]> git.mxchange.org Git - friendica.git/commitdiff
The Diaspora class is now productive
authorMichael Vogel <icarus@dabo.de>
Mon, 14 Mar 2016 22:11:43 +0000 (23:11 +0100)
committerRoland Haeder <roland@mxchange.org>
Sun, 1 May 2016 11:46:08 +0000 (13:46 +0200)
include/diaspora.php
include/diaspora2.php [deleted file]

index 11fe2c9b57dc251762c34c98012475d0e0215bda..75cedeccd1b3254a91b4221702539c755a745050 100644 (file)
 <?php
-
 /**
  * @file include/diaspora.php
- * 
- * @todo GET /people/9aed8882b9f64896/stream
+ * @brief The implementation of the diaspora protocol
  */
 
-require_once('include/crypto.php');
-require_once('include/items.php');
-require_once('include/bb2diaspora.php');
-require_once('include/contact_selectors.php');
-require_once('include/queue_fn.php');
-require_once('include/lock.php');
-require_once('include/threads.php');
-require_once('mod/share.php');
-require_once('include/enotify.php');
-require_once('include/diaspora2.php');
-
-function diaspora_dispatch_public($msg) {
-
-       $enabled = intval(get_config('system','diaspora_enabled'));
-       if(! $enabled) {
-               logger('mod-diaspora: disabled');
-               return;
-       }
-
-       // Use a dummy importer to import the data for the public copy
-       $importer = array("uid" => 0, "page-flags" => PAGE_FREELOVE);
-       $result = diaspora_dispatch($importer,$msg);
-       logger("Dispatcher reported ".$result, LOGGER_DEBUG);
-
-       // Now distribute it to the followers
-       $r = q("SELECT `user`.* FROM `user` WHERE `user`.`uid` IN
-               ( SELECT `contact`.`uid` FROM `contact` WHERE `contact`.`network` = '%s' AND `contact`.`addr` = '%s' )
-               AND `account_expired` = 0 AND `account_removed` = 0 ",
-               dbesc(NETWORK_DIASPORA),
-               dbesc($msg['author'])
-       );
-       if(count($r)) {
-               foreach($r as $rr) {
-                       logger('diaspora_public: delivering to: ' . $rr['username']);
-                       diaspora_dispatch($rr,$msg);
-               }
-       }
-       else
-               logger('diaspora_public: no subscribers for '.$msg["author"].' '.print_r($msg, true));
-}
-
+require_once("include/items.php");
+require_once("include/bb2diaspora.php");
+require_once("include/Scrape.php");
+require_once("include/Contact.php");
+require_once("include/Photo.php");
+require_once("include/socgraph.php");
+require_once("include/group.php");
+require_once("include/xml.php");
+require_once("include/datetime.php");
 
+/**
+ * @brief This class contain functions to create and send Diaspora XML files
+ *
+ */
+class diaspora {
 
-function diaspora_dispatch($importer,$msg,$attempt=1) {
-
-       $ret = 0;
-
-       $enabled = intval(get_config('system','diaspora_enabled'));
-       if(! $enabled) {
-               logger('mod-diaspora: disabled');
-               return;
-       }
-
-       $data = $msg;
+       public static function relay_list() {
 
-       // php doesn't like dashes in variable names
+               $serverdata = get_config("system", "relay_server");
+               if ($serverdata == "")
+                       return array();
 
-       $msg['message'] = str_replace(
-                       array('<activity_streams-photo>','</activity_streams-photo>'),
-                       array('<asphoto>','</asphoto>'),
-                       $msg['message']);
+               $relay = array();
 
+               $servers = explode(",", $serverdata);
 
-       $parsed_xml = parse_xml_string($msg['message'],false);
+               foreach($servers AS $server) {
+                       $server = trim($server);
+                       $batch = $server."/receive/public";
 
-       $xmlbase = $parsed_xml->post;
+                       $relais = q("SELECT `batch`, `id`, `name`,`network` FROM `contact` WHERE `uid` = 0 AND `batch` = '%s' LIMIT 1", dbesc($batch));
 
-       logger('diaspora_dispatch: ' . print_r($xmlbase,true), LOGGER_DEBUG);
+                       if (!$relais) {
+                               $addr = "relay@".str_replace("http://", "", normalise_link($server));
+
+                               $r = q("INSERT INTO `contact` (`uid`, `created`, `name`, `nick`, `addr`, `url`, `nurl`, `batch`, `network`, `rel`, `blocked`, `pending`, `writable`, `name-date`, `uri-date`, `avatar-date`)
+                                       VALUES (0, '%s', '%s', 'relay', '%s', '%s', '%s', '%s', '%s', %d, 0, 0, 1, '%s', '%s', '%s')",
+                                       datetime_convert(),
+                                       dbesc($addr),
+                                       dbesc($addr),
+                                       dbesc($server),
+                                       dbesc(normalise_link($server)),
+                                       dbesc($batch),
+                                       dbesc(NETWORK_DIASPORA),
+                                       intval(CONTACT_IS_FOLLOWER),
+                                       dbesc(datetime_convert()),
+                                       dbesc(datetime_convert()),
+                                       dbesc(datetime_convert())
+                               );
 
+                               $relais = q("SELECT `batch`, `id`, `name`,`network` FROM `contact` WHERE `uid` = 0 AND `batch` = '%s' LIMIT 1", dbesc($batch));
+                               if ($relais)
+                                       $relay[] = $relais[0];
+                       } else
+                               $relay[] = $relais[0];
+               }
 
-       if($xmlbase->request) {
-               $tempfile = tempnam(get_temppath(), "diaspora-request");
-               file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_request($importer,$xmlbase->request);
-       }
-       elseif($xmlbase->status_message) {
-               //$tempfile = tempnam(get_temppath(), "diaspora-status_message");
-               //file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_post($importer,$xmlbase->status_message,$msg);
-       }
-       elseif($xmlbase->profile) {
-               //$tempfile = tempnam(get_temppath(), "diaspora-profile");
-               //file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_profile($importer,$xmlbase->profile,$msg);
-       }
-       elseif($xmlbase->comment) {
-               //$tempfile = tempnam(get_temppath(), "diaspora-comment");
-               //file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_comment($importer,$xmlbase->comment,$msg);
-       }
-       elseif($xmlbase->like) {
-               //$tempfile = tempnam(get_temppath(), "diaspora-like");
-               //file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_like($importer,$xmlbase->like,$msg);
-       }
-       elseif($xmlbase->asphoto) {
-               $tempfile = tempnam(get_temppath(), "diaspora-asphoto");
-               file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_asphoto($importer,$xmlbase->asphoto,$msg);
-       }
-       elseif($xmlbase->reshare) {
-               //$tempfile = tempnam(get_temppath(), "diaspora-reshare");
-               //file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_reshare($importer,$xmlbase->reshare,$msg);
-       }
-       elseif($xmlbase->retraction) {
-               //$tempfile = tempnam(get_temppath(), "diaspora-retraction");
-               //file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_retraction($importer,$xmlbase->retraction,$msg);
+               return $relay;
        }
-       elseif($xmlbase->signed_retraction) {
-               //$tempfile = tempnam(get_temppath(), "diaspora-signed_retraction");
-               //file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_signed_retraction($importer,$xmlbase->signed_retraction,$msg);
-       }
-       elseif($xmlbase->relayable_retraction) {
-               //$tempfile = tempnam(get_temppath(), "diaspora-relayable_retraction");
-               //file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_signed_retraction($importer,$xmlbase->relayable_retraction,$msg);
-       }
-       elseif($xmlbase->photo) {
-               //$tempfile = tempnam(get_temppath(), "diaspora-photo");
-               //file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_photo($importer,$xmlbase->photo,$msg,$attempt);
-       }
-       elseif($xmlbase->conversation) {
-               $tempfile = tempnam(get_temppath(), "diaspora-conversation");
-               file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_conversation($importer,$xmlbase->conversation,$msg);
-       }
-       elseif($xmlbase->message) {
-               $tempfile = tempnam(get_temppath(), "diaspora-message");
-               file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_message($importer,$xmlbase->message,$msg);
-       }
-       elseif($xmlbase->participation) {
-               //$tempfile = tempnam(get_temppath(), "diaspora-participation");
-               //file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_participation($importer,$xmlbase->participation);
-       }
-       elseif($xmlbase->poll_participation) {
-               //$tempfile = tempnam(get_temppath(), "diaspora-poll_participation");
-               //file_put_contents($tempfile, json_encode($data));
-               $ret = diaspora_participation($importer,$xmlbase->poll_participation);
-       }
-       else {
-               $tempfile = tempnam(get_temppath(), "diaspora-unknown");
-               file_put_contents($tempfile, json_encode($data));
-               logger('diaspora_dispatch: unknown message type: ' . print_r($xmlbase,true));
-       }
-       return $ret;
-}
-
-function diaspora_handle_from_contact($contact_id) {
-       $handle = False;
-
-       logger("diaspora_handle_from_contact: contact id is " . $contact_id, LOGGER_DEBUG);
 
-       $r = q("SELECT network, addr, self, url, nick FROM contact WHERE id = %d",
-              intval($contact_id)
-       );
-       if($r) {
-               $contact = $r[0];
+       function repair_signature($signature, $handle = "", $level = 1) {
 
-               logger("diaspora_handle_from_contact: contact 'self' = " . $contact['self'] . " 'url' = " . $contact['url'], LOGGER_DEBUG);
+               if ($signature == "")
+                       return ($signature);
 
-               if($contact['network'] === NETWORK_DIASPORA) {
-                       $handle = $contact['addr'];
+               if (base64_encode(base64_decode(base64_decode($signature))) == base64_decode($signature)) {
+                       $signature = base64_decode($signature);
+                       logger("Repaired double encoded signature from Diaspora/Hubzilla handle ".$handle." - level ".$level, LOGGER_DEBUG);
 
-//                     logger("diaspora_handle_from_contact: contact id is a Diaspora person, handle = " . $handle, LOGGER_DEBUG);
+                       // Do a recursive call to be able to fix even multiple levels
+                       if ($level < 10)
+                               $signature = self::repair_signature($signature, $handle, ++$level);
                }
-               elseif(($contact['network'] === NETWORK_DFRN) || ($contact['self'] == 1)) {
-                       $baseurl_start = strpos($contact['url'],'://') + 3;
-                       $baseurl_length = strpos($contact['url'],'/profile') - $baseurl_start; // allows installations in a subdirectory--not sure how Diaspora will handle
-                       $baseurl = substr($contact['url'], $baseurl_start, $baseurl_length);
-                       $handle = $contact['nick'] . '@' . $baseurl;
 
-//                     logger("diaspora_handle_from_contact: contact id is a DFRN person, handle = " . $handle, LOGGER_DEBUG);
-               }
+               return($signature);
        }
 
-       return $handle;
-}
+       /**
+        * @brief: Decodes incoming Diaspora message
+        *
+        * @param array $importer from user table
+        * @param string $xml urldecoded Diaspora salmon
+        *
+        * @return array
+        * 'message' -> decoded Diaspora XML message
+        * 'author' -> author diaspora handle
+        * 'key' -> author public key (converted to pkcs#8)
+        */
+       function decode($importer, $xml) {
 
-function diaspora_get_contact_by_handle($uid,$handle) {
-       $r = q("SELECT * FROM `contact` WHERE `network` = '%s' AND `uid` = %d AND `addr` = '%s' LIMIT 1",
-               dbesc(NETWORK_DIASPORA),
-               intval($uid),
-               dbesc($handle)
-       );
-       if($r && count($r))
-               return $r[0];
-
-       $handle_parts = explode("@", $handle);
-       $nurl_sql = '%%://' . $handle_parts[1] . '%%/profile/' . $handle_parts[0];
-       $r = q("SELECT * FROM contact WHERE network = '%s' AND uid = %d AND nurl LIKE '%s' LIMIT 1",
-              dbesc(NETWORK_DFRN),
-              intval($uid),
-              dbesc($nurl_sql)
-       );
-       if($r && count($r))
-               return $r[0];
-
-       return false;
-}
+               $public = false;
+               $basedom = parse_xml_string($xml);
 
-function find_diaspora_person_by_handle($handle) {
+               if (!is_object($basedom))
+                       return false;
 
-       $person = false;
-       $update = false;
-       $got_lock = false;
+               $children = $basedom->children('https://joindiaspora.com/protocol');
 
-       $endlessloop = 0;
-       $maxloops = 10;
+               if($children->header) {
+                       $public = true;
+                       $author_link = str_replace('acct:','',$children->header->author_id);
+               } else {
 
-       do {
-               $r = q("select * from fcontact where network = '%s' and addr = '%s' limit 1",
-                       dbesc(NETWORK_DIASPORA),
-                       dbesc($handle)
-               );
-               if(count($r)) {
-                       $person = $r[0];
-                       logger('find_diaspora_person_by handle: in cache ' . print_r($r,true), LOGGER_DEBUG);
+                       $encrypted_header = json_decode(base64_decode($children->encrypted_header));
 
-                       // update record occasionally so it doesn't get stale
-                       $d = strtotime($person['updated'] . ' +00:00');
-                       if($d < strtotime('now - 14 days'))
-                               $update = true;
-               }
+                       $encrypted_aes_key_bundle = base64_decode($encrypted_header->aes_key);
+                       $ciphertext = base64_decode($encrypted_header->ciphertext);
 
+                       $outer_key_bundle = '';
+                       openssl_private_decrypt($encrypted_aes_key_bundle,$outer_key_bundle,$importer['prvkey']);
 
-               // FETCHING PERSON INFORMATION FROM REMOTE SERVER
-               //
-               // If the person isn't in our 'fcontact' table, or if he/she is but
-               // his/her information hasn't been updated for more than 14 days, then
-               // we want to fetch the person's information from the remote server.
-               //
-               // Note that $person isn't changed by this block of code unless the
-               // person's information has been successfully fetched from the remote
-               // server. So if $person was 'false' to begin with (because he/she wasn't
-               // in the local cache), it'll stay false, and if $person held the local
-               // cache information to begin with, it'll keep that information. That way
-               // if there's a problem with the remote fetch, we can at least use our
-               // cached information--it's better than nothing.
-
-               if((! $person) || ($update))  {
-                       // Lock the function to prevent race conditions if multiple items
-                       // come in at the same time from a person who doesn't exist in
-                       // fcontact
-                       //
-                       // Don't loop forever. On the last loop, try to create the contact
-                       // whether the function is locked or not. Maybe the locking thread
-                       // has died or something. At any rate, a duplicate in 'fcontact'
-                       // is a much smaller problem than a deadlocked thread
-                       $got_lock = lock_function('find_diaspora_person_by_handle', false);
-                       if(($endlessloop + 1) >= $maxloops)
-                               $got_lock = true;
-
-                       if($got_lock) {
-                               logger('find_diaspora_person_by_handle: create or refresh', LOGGER_DEBUG);
-                               require_once('include/Scrape.php');
-                               $r = probe_url($handle, PROBE_DIASPORA);
-
-                               // Note that Friendica contacts can return a "Diaspora person"
-                               // if Diaspora connectivity is enabled on their server
-                               if((count($r)) && ($r['network'] === NETWORK_DIASPORA)) {
-                                       add_fcontact($r,$update);
-                                       $person = ($r);
-                               }
+                       $j_outer_key_bundle = json_decode($outer_key_bundle);
 
-                               unlock_function('find_diaspora_person_by_handle');
-                       }
-                       else {
-                               logger('find_diaspora_person_by_handle: couldn\'t lock function', LOGGER_DEBUG);
-                               if(! $person)
-                                       block_on_function_lock('find_diaspora_person_by_handle');
-                       }
-               }
-       } while((! $person) && (! $got_lock) && (++$endlessloop < $maxloops));
-       // We need to try again if the person wasn't in 'fcontact' but the function was locked.
-       // The fact that the function was locked may mean that another process was creating the
-       // person's record. It could also mean another process was creating or updating an unrelated
-       // person.
-       //
-       // At any rate, we need to keep trying until we've either got the person or had a chance to
-       // try to fetch his/her remote information. But we don't want to block on locking the
-       // function, because if the other process is creating the record, then when we acquire the lock
-       // we'll dive right into creating another, duplicate record. We DO want to at least wait
-       // until the lock is released, so we don't flood the database with requests.
-       //
-       // If the person was in the 'fcontact' table, don't try again. It's not worth the time, since
-       // we do have some information for the person
-
-       return $person;
-}
+                       $outer_iv = base64_decode($j_outer_key_bundle->iv);
+                       $outer_key = base64_decode($j_outer_key_bundle->key);
 
+                       $decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $outer_key, $ciphertext, MCRYPT_MODE_CBC, $outer_iv);
 
-function get_diaspora_key($uri) {
-       logger('Fetching diaspora key for: ' . $uri);
 
-       $r = find_diaspora_person_by_handle($uri);
-       if($r)
-               return $r['pubkey'];
-       return '';
-}
+                       $decrypted = pkcs5_unpad($decrypted);
 
+                       /**
+                        * $decrypted now contains something like
+                        *
+                        *  <decrypted_header>
+                        *     <iv>8e+G2+ET8l5BPuW0sVTnQw==</iv>
+                        *     <aes_key>UvSMb4puPeB14STkcDWq+4QE302Edu15oaprAQSkLKU=</aes_key>
+                        *     <author_id>galaxor@diaspora.priateship.org</author_id>
+                        *  </decrypted_header>
+                        */
 
-function diaspora_pubmsg_build($msg,$user,$contact,$prvkey,$pubkey) {
-       $a = get_app();
+                       logger('decrypted: '.$decrypted, LOGGER_DEBUG);
+                       $idom = parse_xml_string($decrypted,false);
 
-       logger('diaspora_pubmsg_build: ' . $msg, LOGGER_DATA);
+                       $inner_iv = base64_decode($idom->iv);
+                       $inner_aes_key = base64_decode($idom->aes_key);
 
+                       $author_link = str_replace('acct:','',$idom->author_id);
+               }
 
-       $handle = $user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
+               $dom = $basedom->children(NAMESPACE_SALMON_ME);
 
-//     $b64_data = base64_encode($msg);
-//     $b64url_data = base64url_encode($b64_data);
+               // figure out where in the DOM tree our data is hiding
 
-       $b64url_data = base64url_encode($msg);
+               if($dom->provenance->data)
+                       $base = $dom->provenance;
+               elseif($dom->env->data)
+                       $base = $dom->env;
+               elseif($dom->data)
+                       $base = $dom;
 
-       $data = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data);
+               if (!$base) {
+                       logger('unable to locate salmon data in xml');
+                       http_status_exit(400);
+               }
 
-       $type = 'application/xml';
-       $encoding = 'base64url';
-       $alg = 'RSA-SHA256';
 
-       $signable_data = $data  . '.' . base64url_encode($type) . '.'
-               . base64url_encode($encoding) . '.' . base64url_encode($alg) ;
+               // Stash the signature away for now. We have to find their key or it won't be good for anything.
+               $signature = base64url_decode($base->sig);
 
-       $signature = rsa_sign($signable_data,$prvkey);
-       $sig = base64url_encode($signature);
+               // unpack the  data
 
-$magic_env = <<< EOT
-<?xml version='1.0' encoding='UTF-8'?>
-<diaspora xmlns="https://joindiaspora.com/protocol" xmlns:me="http://salmon-protocol.org/ns/magic-env" >
-  <header>
-    <author_id>$handle</author_id>
-  </header>
-  <me:env>
-    <me:encoding>base64url</me:encoding>
-    <me:alg>RSA-SHA256</me:alg>
-    <me:data type="application/xml">$data</me:data>
-    <me:sig>$sig</me:sig>
-  </me:env>
-</diaspora>
-EOT;
+               // strip whitespace so our data element will return to one big base64 blob
+               $data = str_replace(array(" ","\t","\r","\n"),array("","","",""),$base->data);
 
-       logger('diaspora_pubmsg_build: magic_env: ' . $magic_env, LOGGER_DATA);
-       return $magic_env;
 
-}
+               // stash away some other stuff for later
 
+               $type = $base->data[0]->attributes()->type[0];
+               $keyhash = $base->sig[0]->attributes()->keyhash[0];
+               $encoding = $base->encoding;
+               $alg = $base->alg;
 
 
+               $signed_data = $data.'.'.base64url_encode($type).'.'.base64url_encode($encoding).'.'.base64url_encode($alg);
 
-function diaspora_msg_build($msg,$user,$contact,$prvkey,$pubkey,$public = false) {
-       $a = get_app();
 
-       if($public)
-               return diaspora_pubmsg_build($msg,$user,$contact,$prvkey,$pubkey);
+               // decode the data
+               $data = base64url_decode($data);
 
-       logger('diaspora_msg_build: ' . $msg, LOGGER_DATA);
 
-       // without a public key nothing will work
+               if($public)
+                       $inner_decrypted = $data;
+               else {
 
-       if(! $pubkey) {
-               logger('diaspora_msg_build: pubkey missing: contact id: ' . $contact['id']);
-               return '';
-       }
+                       // Decode the encrypted blob
 
-       $inner_aes_key = random_string(32);
-       $b_inner_aes_key = base64_encode($inner_aes_key);
-       $inner_iv = random_string(16);
-       $b_inner_iv = base64_encode($inner_iv);
+                       $inner_encrypted = base64_decode($data);
+                       $inner_decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $inner_encrypted, MCRYPT_MODE_CBC, $inner_iv);
+                       $inner_decrypted = pkcs5_unpad($inner_decrypted);
+               }
 
-       $outer_aes_key = random_string(32);
-       $b_outer_aes_key = base64_encode($outer_aes_key);
-       $outer_iv = random_string(16);
-       $b_outer_iv = base64_encode($outer_iv);
+               if (!$author_link) {
+                       logger('Could not retrieve author URI.');
+                       http_status_exit(400);
+               }
+               // Once we have the author URI, go to the web and try to find their public key
+               // (first this will look it up locally if it is in the fcontact cache)
+               // This will also convert diaspora public key from pkcs#1 to pkcs#8
 
-       $handle = $user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
+               logger('Fetching key for '.$author_link);
+               $key = self::key($author_link);
 
-       $padded_data = pkcs5_pad($msg,16);
-       $inner_encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $padded_data, MCRYPT_MODE_CBC, $inner_iv);
+               if (!$key) {
+                       logger('Could not retrieve author key.');
+                       http_status_exit(400);
+               }
 
-       $b64_data = base64_encode($inner_encrypted);
+               $verify = rsa_verify($signed_data,$signature,$key);
 
+               if (!$verify) {
+                       logger('Message did not verify. Discarding.');
+                       http_status_exit(400);
+               }
 
-       $b64url_data = base64url_encode($b64_data);
-       $data = str_replace(array("\n","\r"," ","\t"),array('','','',''),$b64url_data);
+               logger('Message verified.');
 
-       $type = 'application/xml';
-       $encoding = 'base64url';
-       $alg = 'RSA-SHA256';
+               return array('message' => $inner_decrypted, 'author' => $author_link, 'key' => $key);
 
-       $signable_data = $data  . '.' . base64url_encode($type) . '.'
-               . base64url_encode($encoding) . '.' . base64url_encode($alg) ;
+       }
 
-       $signature = rsa_sign($signable_data,$prvkey);
-       $sig = base64url_encode($signature);
 
-$decrypted_header = <<< EOT
-<decrypted_header>
-  <iv>$b_inner_iv</iv>
-  <aes_key>$b_inner_aes_key</aes_key>
-  <author_id>$handle</author_id>
-</decrypted_header>
-EOT;
+       /**
+        * @brief Dispatches public messages and find the fitting receivers
+        *
+        * @param array $msg The post that will be dispatched
+        *
+        * @return bool Was the message accepted?
+        */
+       public static function dispatch_public($msg) {
 
-       $decrypted_header = pkcs5_pad($decrypted_header,16);
+               $enabled = intval(get_config("system", "diaspora_enabled"));
+               if (!$enabled) {
+                       logger("diaspora is disabled");
+                       return false;
+               }
 
-       $ciphertext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $outer_aes_key, $decrypted_header, MCRYPT_MODE_CBC, $outer_iv);
+               // Use a dummy importer to import the data for the public copy
+               $importer = array("uid" => 0, "page-flags" => PAGE_FREELOVE);
+               $item_id = self::dispatch($importer,$msg);
 
-       $outer_json = json_encode(array('iv' => $b_outer_iv,'key' => $b_outer_aes_key));
+               // Now distribute it to the followers
+               $r = q("SELECT `user`.* FROM `user` WHERE `user`.`uid` IN
+                       (SELECT `contact`.`uid` FROM `contact` WHERE `contact`.`network` = '%s' AND `contact`.`addr` = '%s')
+                       AND NOT `account_expired` AND NOT `account_removed`",
+                       dbesc(NETWORK_DIASPORA),
+                       dbesc($msg["author"])
+               );
+               if($r) {
+                       foreach($r as $rr) {
+                               logger("delivering to: ".$rr["username"]);
+                               self::dispatch($rr,$msg);
+                       }
+               } else
+                       logger("No subscribers for ".$msg["author"]." ".print_r($msg, true));
 
-       $encrypted_outer_key_bundle = '';
-       openssl_public_encrypt($outer_json,$encrypted_outer_key_bundle,$pubkey);
+               return $item_id;
+       }
 
-       $b64_encrypted_outer_key_bundle = base64_encode($encrypted_outer_key_bundle);
+       /**
+        * @brief Dispatches the different message types to the different functions
+        *
+        * @param array $importer Array of the importer user
+        * @param array $msg The post that will be dispatched
+        *
+        * @return bool Was the message accepted?
+        */
+       public static function dispatch($importer, $msg) {
 
-       logger('outer_bundle: ' . $b64_encrypted_outer_key_bundle . ' key: ' . $pubkey, LOGGER_DATA);
+               // The sender is the handle of the contact that sent the message.
+               // This will often be different with relayed messages (for example "like" and "comment")
+               $sender = $msg["author"];
 
-       $encrypted_header_json_object = json_encode(array('aes_key' => base64_encode($encrypted_outer_key_bundle), 
-               'ciphertext' => base64_encode($ciphertext)));
-       $cipher_json = base64_encode($encrypted_header_json_object);
+               if (!diaspora::valid_posting($msg, $fields)) {
+                       logger("Invalid posting");
+                       return false;
+               }
 
-       $encrypted_header = '<encrypted_header>' . $cipher_json . '</encrypted_header>';
+               $type = $fields->getName();
 
-$magic_env = <<< EOT
-<?xml version='1.0' encoding='UTF-8'?>
-<diaspora xmlns="https://joindiaspora.com/protocol" xmlns:me="http://salmon-protocol.org/ns/magic-env" >
-  $encrypted_header
-  <me:env>
-    <me:encoding>base64url</me:encoding>
-    <me:alg>RSA-SHA256</me:alg>
-    <me:data type="application/xml">$data</me:data>
-    <me:sig>$sig</me:sig>
-  </me:env>
-</diaspora>
-EOT;
+               logger("Received message type ".$type." from ".$sender." for user ".$importer["uid"], LOGGER_DEBUG);
 
-       logger('diaspora_msg_build: magic_env: ' . $magic_env, LOGGER_DATA);
-       return $magic_env;
+               switch ($type) {
+                       case "account_deletion":
+                               return self::receive_account_deletion($importer, $fields);
 
-}
+                       case "comment":
+                               return self::receive_comment($importer, $sender, $fields);
 
-/**
- *
- * diaspora_decode($importer,$xml)
- *   array $importer -> from user table
- *   string $xml -> urldecoded Diaspora salmon 
- *
- * Returns array
- * 'message' -> decoded Diaspora XML message
- * 'author' -> author diaspora handle
- * 'key' -> author public key (converted to pkcs#8)
- *
- * Author and key are used elsewhere to save a lookup for verifying replies and likes
- */
+                       case "conversation":
+                               return self::receive_conversation($importer, $msg, $fields);
 
+                       case "like":
+                               return self::receive_like($importer, $sender, $fields);
 
-function diaspora_decode($importer,$xml) {
+                       case "message":
+                               return self::receive_message($importer, $fields);
 
-       $tempfile = tempnam(get_temppath(), "diaspora-decode");
-       file_put_contents($tempfile, json_encode(array("importer" => $importer, "xml" => $xml)));
+                       case "participation": // Not implemented
+                               return self::receive_participation($importer, $fields);
 
-       $public = false;
-       $basedom = parse_xml_string($xml);
+                       case "photo": // Not implemented
+                               return self::receive_photo($importer, $fields);
 
-       $children = $basedom->children('https://joindiaspora.com/protocol');
-
-       if($children->header) {
-               $public = true;
-               $author_link = str_replace('acct:','',$children->header->author_id);
-       }
-       else {
+                       case "poll_participation": // Not implemented
+                               return self::receive_poll_participation($importer, $fields);
 
-               $encrypted_header = json_decode(base64_decode($children->encrypted_header));
+                       case "profile":
+                               return self::receive_profile($importer, $fields);
 
-               $encrypted_aes_key_bundle = base64_decode($encrypted_header->aes_key);
-               $ciphertext = base64_decode($encrypted_header->ciphertext);
+                       case "request":
+                               return self::receive_request($importer, $fields);
 
-               $outer_key_bundle = '';
-               openssl_private_decrypt($encrypted_aes_key_bundle,$outer_key_bundle,$importer['prvkey']);
+                       case "reshare":
+                               return self::receive_reshare($importer, $fields);
 
-               $j_outer_key_bundle = json_decode($outer_key_bundle);
+                       case "retraction":
+                               return self::receive_retraction($importer, $sender, $fields);
 
-               $outer_iv = base64_decode($j_outer_key_bundle->iv);
-               $outer_key = base64_decode($j_outer_key_bundle->key);
-
-               $decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $outer_key, $ciphertext, MCRYPT_MODE_CBC, $outer_iv);
+                       case "status_message":
+                               return self::receive_status_message($importer, $fields);
 
+                       default:
+                               logger("Unknown message type ".$type);
+                               return false;
+               }
 
-               $decrypted = pkcs5_unpad($decrypted);
+               return true;
+       }
 
-               /**
-                * $decrypted now contains something like
-                *
-                *  <decrypted_header>
-                *     <iv>8e+G2+ET8l5BPuW0sVTnQw==</iv>
-                *     <aes_key>UvSMb4puPeB14STkcDWq+4QE302Edu15oaprAQSkLKU=</aes_key>
+       /**
+        * @brief Checks if a posting is valid and fetches the data fields.
+        *
+        * This function does not only check the signature.
+        * It also does the conversion between the old and the new diaspora format.
+        *
+        * @param array $msg Array with the XML, the sender handle and the sender signature
+        * @param object $fields SimpleXML object that contains the posting when it is valid
+        *
+        * @return bool Is the posting valid?
+        */
+       private function valid_posting($msg, &$fields) {
 
-***** OBSOLETE
+               $data = parse_xml_string($msg["message"], false);
 
-                *     <author>
-                *       <name>Ryan Hughes</name>
-                *       <uri>acct:galaxor@diaspora.pirateship.org</uri>
-                *     </author>
+               if (!is_object($data))
+                       return false;
 
-***** CURRENT
+               $first_child = $data->getName();
 
-                *     <author_id>galaxor@diaspora.priateship.org</author_id>
+               // Is this the new or the old version?
+               if ($data->getName() == "XML") {
+                       $oldXML = true;
+                       foreach ($data->post->children() as $child)
+                               $element = $child;
+               } else {
+                       $oldXML = false;
+                       $element = $data;
+               }
 
-***** END DIFFS
+               $type = $element->getName();
+               $orig_type = $type;
 
-                *  </decrypted_header>
-                */
+               // All retractions are handled identically from now on.
+               // In the new version there will only be "retraction".
+               if (in_array($type, array("signed_retraction", "relayable_retraction")))
+                       $type = "retraction";
 
-               logger('decrypted: ' . $decrypted, LOGGER_DEBUG);
-               $idom = parse_xml_string($decrypted,false);
+               $fields = new SimpleXMLElement("<".$type."/>");
 
-               $inner_iv = base64_decode($idom->iv);
-               $inner_aes_key = base64_decode($idom->aes_key);
+               $signed_data = "";
 
-               $author_link = str_replace('acct:','',$idom->author_id);
+               foreach ($element->children() AS $fieldname => $entry) {
+                       if ($oldXML) {
+                               // Translation for the old XML structure
+                               if ($fieldname == "diaspora_handle")
+                                       $fieldname = "author";
 
-       }
+                               if ($fieldname == "participant_handles")
+                                       $fieldname = "participants";
 
-       $dom = $basedom->children(NAMESPACE_SALMON_ME);
+                               if (in_array($type, array("like", "participation"))) {
+                                       if ($fieldname == "target_type")
+                                               $fieldname = "parent_type";
+                               }
 
-       // figure out where in the DOM tree our data is hiding
+                               if ($fieldname == "sender_handle")
+                                       $fieldname = "author";
 
-       if($dom->provenance->data)
-               $base = $dom->provenance;
-       elseif($dom->env->data)
-               $base = $dom->env;
-       elseif($dom->data)
-               $base = $dom;
+                               if ($fieldname == "recipient_handle")
+                                       $fieldname = "recipient";
 
-       if(! $base) {
-               logger('mod-diaspora: unable to locate salmon data in xml ');
-               http_status_exit(400);
-       }
+                               if ($fieldname == "root_diaspora_id")
+                                       $fieldname = "root_author";
 
+                               if ($type == "retraction") {
+                                       if ($fieldname == "post_guid")
+                                               $fieldname = "target_guid";
 
-       // Stash the signature away for now. We have to find their key or it won't be good for anything.
-       $signature = base64url_decode($base->sig);
+                                       if ($fieldname == "type")
+                                               $fieldname = "target_type";
+                               }
+                       }
 
-       // unpack the  data
+                       if ($fieldname == "author_signature")
+                               $author_signature = base64_decode($entry);
+                       elseif ($fieldname == "parent_author_signature")
+                               $parent_author_signature = base64_decode($entry);
+                       elseif ($fieldname != "target_author_signature") {
+                               if ($signed_data != "") {
+                                       $signed_data .= ";";
+                                       $signed_data_parent .= ";";
+                               }
 
-       // strip whitespace so our data element will return to one big base64 blob
-       $data = str_replace(array(" ","\t","\r","\n"),array("","","",""),$base->data);
+                               $signed_data .= $entry;
+                       }
+                       if (!in_array($fieldname, array("parent_author_signature", "target_author_signature")) OR
+                               ($orig_type == "relayable_retraction"))
+                               xml::copy($entry, $fields, $fieldname);
+               }
 
+               // This is something that shouldn't happen at all.
+               if (in_array($type, array("status_message", "reshare", "profile")))
+                       if ($msg["author"] != $fields->author) {
+                               logger("Message handle is not the same as envelope sender. Quitting this message.");
+                               return false;
+                       }
 
-       // stash away some other stuff for later
+               // Only some message types have signatures. So we quit here for the other types.
+               if (!in_array($type, array("comment", "message", "like")))
+                       return true;
 
-       $type = $base->data[0]->attributes()->type[0];
-       $keyhash = $base->sig[0]->attributes()->keyhash[0];
-       $encoding = $base->encoding;
-       $alg = $base->alg;
+               // No author_signature? This is a must, so we quit.
+               if (!isset($author_signature))
+                       return false;
 
+               if (isset($parent_author_signature)) {
+                       $key = self::key($msg["author"]);
 
-       $signed_data = $data  . '.' . base64url_encode($type) . '.' . base64url_encode($encoding) . '.' . base64url_encode($alg);
+                       if (!rsa_verify($signed_data, $parent_author_signature, $key, "sha256"))
+                               return false;
+               }
 
+               $key = self::key($fields->author);
 
-       // decode the data
-       $data = base64url_decode($data);
+               return rsa_verify($signed_data, $author_signature, $key, "sha256");
+       }
 
+       /**
+        * @brief Fetches the public key for a given handle
+        *
+        * @param string $handle The handle
+        *
+        * @return string The public key
+        */
+       private function key($handle) {
+               $handle = strval($handle);
 
-       if($public) {
-               $inner_decrypted = $data;
-       }
-       else {
+               logger("Fetching diaspora key for: ".$handle);
 
-               // Decode the encrypted blob
+               $r = self::person_by_handle($handle);
+               if($r)
+                       return $r["pubkey"];
 
-               $inner_encrypted = base64_decode($data);
-               $inner_decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $inner_encrypted, MCRYPT_MODE_CBC, $inner_iv);
-               $inner_decrypted = pkcs5_unpad($inner_decrypted);
+               return "";
        }
 
-       if(! $author_link) {
-               logger('mod-diaspora: Could not retrieve author URI.');
-               http_status_exit(400);
-       }
+       /**
+        * @brief Fetches data for a given handle
+        *
+        * @param string $handle The handle
+        *
+        * @return array the queried data
+        */
+       private function person_by_handle($handle) {
 
-       // Once we have the author URI, go to the web and try to find their public key
-       // (first this will look it up locally if it is in the fcontact cache)
-       // This will also convert diaspora public key from pkcs#1 to pkcs#8
+               $r = q("SELECT * FROM `fcontact` WHERE `network` = '%s' AND `addr` = '%s' LIMIT 1",
+                       dbesc(NETWORK_DIASPORA),
+                       dbesc($handle)
+               );
+               if ($r) {
+                       $person = $r[0];
+                       logger("In cache ".print_r($r,true), LOGGER_DEBUG);
 
-       logger('mod-diaspora: Fetching key for ' . $author_link );
-       $key = get_diaspora_key($author_link);
+                       // update record occasionally so it doesn't get stale
+                       $d = strtotime($person["updated"]." +00:00");
+                       if ($d < strtotime("now - 14 days"))
+                               $update = true;
+               }
 
-       if(! $key) {
-               logger('mod-diaspora: Could not retrieve author key.');
-               http_status_exit(400);
-       }
+               if (!$person OR $update) {
+                       logger("create or refresh", LOGGER_DEBUG);
+                       $r = probe_url($handle, PROBE_DIASPORA);
 
-       $verify = rsa_verify($signed_data,$signature,$key);
+                       // Note that Friendica contacts will return a "Diaspora person"
+                       // if Diaspora connectivity is enabled on their server
+                       if ($r AND ($r["network"] === NETWORK_DIASPORA)) {
+                               self::add_fcontact($r, $update);
+                               $person = $r;
+                       }
+               }
+               return $person;
+       }
+
+       /**
+        * @brief Updates the fcontact table
+        *
+        * @param array $arr The fcontact data
+        * @param bool $update Update or insert?
+        *
+        * @return string The id of the fcontact entry
+        */
+       private function add_fcontact($arr, $update = false) {
+               /// @todo Remove this function from include/network.php
+
+               if($update) {
+                       $r = q("UPDATE `fcontact` SET
+                                       `name` = '%s',
+                                       `photo` = '%s',
+                                       `request` = '%s',
+                                       `nick` = '%s',
+                                       `addr` = '%s',
+                                       `batch` = '%s',
+                                       `notify` = '%s',
+                                       `poll` = '%s',
+                                       `confirm` = '%s',
+                                       `alias` = '%s',
+                                       `pubkey` = '%s',
+                                       `updated` = '%s'
+                               WHERE `url` = '%s' AND `network` = '%s'",
+                                       dbesc($arr["name"]),
+                                       dbesc($arr["photo"]),
+                                       dbesc($arr["request"]),
+                                       dbesc($arr["nick"]),
+                                       dbesc($arr["addr"]),
+                                       dbesc($arr["batch"]),
+                                       dbesc($arr["notify"]),
+                                       dbesc($arr["poll"]),
+                                       dbesc($arr["confirm"]),
+                                       dbesc($arr["alias"]),
+                                       dbesc($arr["pubkey"]),
+                                       dbesc(datetime_convert()),
+                                       dbesc($arr["url"]),
+                                       dbesc($arr["network"])
+                               );
+               } else {
+                       $r = q("INSERT INTO `fcontact` (`url`,`name`,`photo`,`request`,`nick`,`addr`,
+                                       `batch`, `notify`,`poll`,`confirm`,`network`,`alias`,`pubkey`,`updated`)
+                               VALUES ('%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s')",
+                                       dbesc($arr["url"]),
+                                       dbesc($arr["name"]),
+                                       dbesc($arr["photo"]),
+                                       dbesc($arr["request"]),
+                                       dbesc($arr["nick"]),
+                                       dbesc($arr["addr"]),
+                                       dbesc($arr["batch"]),
+                                       dbesc($arr["notify"]),
+                                       dbesc($arr["poll"]),
+                                       dbesc($arr["confirm"]),
+                                       dbesc($arr["network"]),
+                                       dbesc($arr["alias"]),
+                                       dbesc($arr["pubkey"]),
+                                       dbesc(datetime_convert())
+                               );
+               }
 
-       if(! $verify) {
-               logger('mod-diaspora: Message did not verify. Discarding.');
-               http_status_exit(400);
+               return $r;
        }
 
-       logger('mod-diaspora: Message verified.');
+       public static function handle_from_contact($contact_id) {
+               $handle = False;
 
-       return array('message' => $inner_decrypted, 'author' => $author_link, 'key' => $key);
-
-}
+               logger("contact id is ".$contact_id, LOGGER_DEBUG);
 
+               $r = q("SELECT `network`, `addr`, `self`, `url`, `nick` FROM `contact` WHERE `id` = %d",
+                      intval($contact_id)
+               );
+               if($r) {
+                       $contact = $r[0];
+
+                       logger("contact 'self' = ".$contact['self']." 'url' = ".$contact['url'], LOGGER_DEBUG);
+
+                       if($contact['addr'] != "")
+                               $handle = $contact['addr'];
+                       elseif(($contact['network'] === NETWORK_DFRN) || ($contact['self'] == 1)) {
+                               $baseurl_start = strpos($contact['url'],'://') + 3;
+                               $baseurl_length = strpos($contact['url'],'/profile') - $baseurl_start; // allows installations in a subdirectory--not sure how Diaspora will handle
+                               $baseurl = substr($contact['url'], $baseurl_start, $baseurl_length);
+                               $handle = $contact['nick'].'@'.$baseurl;
+                       }
+               }
 
-function diaspora_request($importer,$xml) {
+               return $handle;
+       }
 
-       $a = get_app();
+       private function contact_by_handle($uid, $handle) {
+               $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `addr` = '%s' LIMIT 1",
+                       intval($uid),
+                       dbesc($handle)
+               );
 
-       $sender_handle = unxmlify($xml->sender_handle);
-       $recipient_handle = unxmlify($xml->recipient_handle);
+               if ($r)
+                       return $r[0];
 
-       if(! $sender_handle || ! $recipient_handle)
-               return;
+               $handle_parts = explode("@", $handle);
+               $nurl_sql = "%%://".$handle_parts[1]."%%/profile/".$handle_parts[0];
+               $r = q("SELECT * FROM `contact` WHERE `network` = '%s' AND `uid` = %d AND `nurl` LIKE '%s' LIMIT 1",
+                       dbesc(NETWORK_DFRN),
+                       intval($uid),
+                       dbesc($nurl_sql)
+               );
+               if($r)
+                       return $r[0];
 
-       $contact = diaspora_get_contact_by_handle($importer['uid'],$sender_handle);
+               return false;
+       }
 
-       if($contact) {
+       private function post_allow($importer, $contact, $is_comment = false) {
 
                // perhaps we were already sharing with this person. Now they're sharing with us.
                // That makes us friends.
-
-               if($contact['rel'] == CONTACT_IS_FOLLOWER && in_array($importer['page-flags'], array(PAGE_FREELOVE))) {
+               // Normally this should have handled by getting a request - but this could get lost
+               if($contact["rel"] == CONTACT_IS_FOLLOWER && in_array($importer["page-flags"], array(PAGE_FREELOVE))) {
                        q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d",
                                intval(CONTACT_IS_FRIEND),
-                               intval($contact['id']),
-                               intval($importer['uid'])
+                               intval($contact["id"]),
+                               intval($importer["uid"])
                        );
+                       $contact["rel"] = CONTACT_IS_FRIEND;
+                       logger("defining user ".$contact["nick"]." as friend");
                }
-               // send notification
-
-               $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
-                       intval($importer['uid'])
-               );
 
-               if((count($r)) && (!$r[0]['hide-friends']) && (!$contact['hidden']) && intval(get_pconfig($importer['uid'],'system','post_newfriend'))) {
-                       require_once('include/items.php');
-
-                       $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
-                               intval($importer['uid'])
-                       );
-
-                       // they are not CONTACT_IS_FOLLOWER anymore but that's what we have in the array
-
-                       if(count($self) && $contact['rel'] == CONTACT_IS_FOLLOWER) {
-
-                               $arr = array();
-                               $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $importer['uid']);
-                               $arr['uid'] = $importer['uid'];
-                               $arr['contact-id'] = $self[0]['id'];
-                               $arr['wall'] = 1;
-                               $arr['type'] = 'wall';
-                               $arr['gravity'] = 0;
-                               $arr['origin'] = 1;
-                               $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
-                               $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
-                               $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
-                               $arr['verb'] = ACTIVITY_FRIEND;
-                               $arr['object-type'] = ACTIVITY_OBJ_PERSON;
-
-                               $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
-                               $B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
-                               $BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
-                               $arr['body'] =  sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$Bphoto;
-
-                               $arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
-                                       . '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
-                               $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
-                               $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
-                               $arr['object'] .= '</link></object>' . "\n";
-                               $arr['last-child'] = 1;
-
-                               $arr['allow_cid'] = $user[0]['allow_cid'];
-                               $arr['allow_gid'] = $user[0]['allow_gid'];
-                               $arr['deny_cid']  = $user[0]['deny_cid'];
-                               $arr['deny_gid']  = $user[0]['deny_gid'];
-
-                               $i = item_store($arr);
-                               if($i)
-                               proc_run('php',"include/notifier.php","activity","$i");
-
-                       }
+               if(($contact["blocked"]) || ($contact["readonly"]) || ($contact["archive"]))
+                       return false;
+               if($contact["rel"] == CONTACT_IS_SHARING || $contact["rel"] == CONTACT_IS_FRIEND)
+                       return true;
+               if($contact["rel"] == CONTACT_IS_FOLLOWER)
+                       if(($importer["page-flags"] == PAGE_COMMUNITY) OR $is_comment)
+                               return true;
 
-               }
+               // Messages for the global users are always accepted
+               if ($importer["uid"] == 0)
+                       return true;
 
-               return;
+               return false;
        }
 
-       $ret = find_diaspora_person_by_handle($sender_handle);
-
+       private function allowed_contact_by_handle($importer, $handle, $is_comment = false) {
+               $contact = self::contact_by_handle($importer["uid"], $handle);
+               if (!$contact) {
+                       logger("A Contact for handle ".$handle." and user ".$importer["uid"]." was not found");
+                       return false;
+               }
 
-       if((! count($ret)) || ($ret['network'] != NETWORK_DIASPORA)) {
-               logger('diaspora_request: Cannot resolve diaspora handle ' . $sender_handle . ' for ' . $recipient_handle);
-               return;
+               if (!self::post_allow($importer, $contact, $is_comment)) {
+                       logger("The handle: ".$handle." is not allowed to post to user ".$importer["uid"]);
+                       return false;
+               }
+               return $contact;
        }
 
-       $batch = (($ret['batch']) ? $ret['batch'] : implode('/', array_slice(explode('/',$ret['url']),0,3)) . '/receive/public');
-
-
-
-       $r = q("INSERT INTO `contact` (`uid`, `network`,`addr`,`created`,`url`,`nurl`,`batch`,`name`,`nick`,`photo`,`pubkey`,`notify`,`poll`,`blocked`,`priority`)
-               VALUES ( %d, '%s', '%s', '%s', '%s','%s','%s','%s','%s','%s','%s','%s','%s',%d,%d) ",
-               intval($importer['uid']),
-               dbesc($ret['network']),
-               dbesc($ret['addr']),
-               datetime_convert(),
-               dbesc($ret['url']),
-               dbesc(normalise_link($ret['url'])),
-               dbesc($batch),
-               dbesc($ret['name']),
-               dbesc($ret['nick']),
-               dbesc($ret['photo']),
-               dbesc($ret['pubkey']),
-               dbesc($ret['notify']),
-               dbesc($ret['poll']),
-               1,
-               2
-       );
-
-       // find the contact record we just created
+       private function message_exists($uid, $guid) {
+               $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
+                       intval($uid),
+                       dbesc($guid)
+               );
 
-       $contact_record = diaspora_get_contact_by_handle($importer['uid'],$sender_handle);
+               if($r) {
+                       logger("message ".$guid." already exists for user ".$uid);
+                       return true;
+               }
 
-       if(! $contact_record) {
-               logger('diaspora_request: unable to locate newly created contact record.');
-               return;
+               return false;
        }
 
-       $def_gid = get_default_group($importer['uid'], $ret["network"]);
-       if (intval($def_gid)) {
-               require_once('include/group.php');
-               group_add_member($importer['uid'], '', $contact_record['id'], $def_gid);
+       private function fetch_guid($item) {
+               preg_replace_callback("&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
+                       function ($match) use ($item){
+                               return(self::fetch_guid_sub($match, $item));
+                       },$item["body"]);
        }
 
-       if($importer['page-flags'] == PAGE_NORMAL) {
-
-               $hash = random_string() . (string) time();   // Generate a confirm_key
-
-               $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime` )
-                       VALUES ( %d, %d, %d, %d, '%s', '%s', '%s' )",
-                       intval($importer['uid']),
-                       intval($contact_record['id']),
-                       0,
-                       0,
-                       dbesc( t('Sharing notification from Diaspora network')),
-                       dbesc($hash),
-                       dbesc(datetime_convert())
-               );
+       private function fetch_guid_sub($match, $item) {
+               if (!self::store_by_guid($match[1], $item["author-link"]))
+                       self::store_by_guid($match[1], $item["owner-link"]);
        }
-       else {
 
-               // automatic friend approval
+       private function store_by_guid($guid, $server, $uid = 0) {
+               $serverparts = parse_url($server);
+               $server = $serverparts["scheme"]."://".$serverparts["host"];
 
-               require_once('include/Photo.php');
+               logger("Trying to fetch item ".$guid." from ".$server, LOGGER_DEBUG);
 
-               update_contact_avatar($contact_record['photo'],$importer['uid'],$contact_record['id']);
+               $msg = self::message($guid, $server);
 
-               // technically they are sharing with us (CONTACT_IS_SHARING),
-               // but if our page-type is PAGE_COMMUNITY or PAGE_SOAPBOX
-               // we are going to change the relationship and make them a follower.
+               if (!$msg)
+                       return false;
 
-               if($importer['page-flags'] == PAGE_FREELOVE)
-                       $new_relation = CONTACT_IS_FRIEND;
-               else
-                       $new_relation = CONTACT_IS_FOLLOWER;
-
-               $r = q("UPDATE `contact` SET `rel` = %d,
-                       `name-date` = '%s',
-                       `uri-date` = '%s',
-                       `blocked` = 0,
-                       `pending` = 0,
-                       `writable` = 1
-                       WHERE `id` = %d
-                       ",
-                       intval($new_relation),
-                       dbesc(datetime_convert()),
-                       dbesc(datetime_convert()),
-                       intval($contact_record['id'])
-               );
+               logger("Successfully fetched item ".$guid." from ".$server, LOGGER_DEBUG);
 
-               $u = q("select * from user where uid = %d limit 1",intval($importer['uid']));
-               if($u)
-                       $ret = diaspora_share($u[0],$contact_record);
+               // Now call the dispatcher
+               return self::dispatch_public($msg);
        }
 
-       return;
-}
+       private function message($guid, $server, $level = 0) {
 
-function diaspora_post_allow($importer,$contact, $is_comment = false) {
-
-       // perhaps we were already sharing with this person. Now they're sharing with us.
-       // That makes us friends.
-       // Normally this should have handled by getting a request - but this could get lost
-       if($contact['rel'] == CONTACT_IS_FOLLOWER && in_array($importer['page-flags'], array(PAGE_FREELOVE))) {
-               q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d",
-                       intval(CONTACT_IS_FRIEND),
-                       intval($contact['id']),
-                       intval($importer['uid'])
-               );
-               $contact['rel'] = CONTACT_IS_FRIEND;
-               logger('diaspora_post_allow: defining user '.$contact["nick"].' as friend');
-       }
+               if ($level > 5)
+                       return false;
 
-       if(($contact['blocked']) || ($contact['readonly']) || ($contact['archive']))
-               return false;
-       if($contact['rel'] == CONTACT_IS_SHARING || $contact['rel'] == CONTACT_IS_FRIEND)
-               return true;
-       if($contact['rel'] == CONTACT_IS_FOLLOWER)
-               if(($importer['page-flags'] == PAGE_COMMUNITY) OR $is_comment)
-                       return true;
+               // This will work for Diaspora and newer Friendica servers
+               $source_url = $server."/p/".$guid.".xml";
+               $x = fetch_url($source_url);
+               if(!$x)
+                       return false;
 
-       // Messages for the global users are always accepted
-       if ($importer['uid'] == 0)
-               return true;
+               $source_xml = parse_xml_string($x, false);
 
-       return false;
-}
+               if (!is_object($source_xml))
+                       return false;
 
-function diaspora_is_redmatrix($url) {
-       return(strstr($url, "/channel/"));
-}
+               if ($source_xml->post->reshare) {
+                       // Reshare of a reshare - old Diaspora version
+                       return self::message($source_xml->post->reshare->root_guid, $server, ++$level);
+               } elseif ($source_xml->getName() == "reshare") {
+                       // Reshare of a reshare - new Diaspora version
+                       return self::message($source_xml->root_guid, $server, ++$level);
+               }
 
-function diaspora_plink($addr, $guid) {
-       $r = q("SELECT `url`, `nick`, `network` FROM `fcontact` WHERE `addr`='%s' LIMIT 1", dbesc($addr));
+               $author = "";
 
-       // Fallback
-       if (!$r)
-               return 'https://'.substr($addr,strpos($addr,'@')+1).'/posts/'.$guid;
+               // Fetch the author - for the old and the new Diaspora version
+               if ($source_xml->post->status_message->diaspora_handle)
+                       $author = (string)$source_xml->post->status_message->diaspora_handle;
+               elseif ($source_xml->author AND ($source_xml->getName() == "status_message"))
+                       $author = (string)$source_xml->author;
 
-       // Friendica contacts are often detected as Diaspora contacts in the "fcontact" table
-       // So we try another way as well.
-       $s = q("SELECT `network` FROM `gcontact` WHERE `nurl`='%s' LIMIT 1", dbesc(normalise_link($r[0]["url"])));
-       if ($s)
-               $r[0]["network"] = $s[0]["network"];
+               // If this isn't a "status_message" then quit
+               if (!$author)
+                       return false;
 
-       if ($r[0]["network"] == NETWORK_DFRN)
-               return(str_replace("/profile/".$r[0]["nick"]."/", "/display/".$guid, $r[0]["url"]."/"));
+               $msg = array("message" => $x, "author" => $author);
 
-       if (diaspora_is_redmatrix($r[0]["url"]))
-               return $r[0]["url"]."/?f=&mid=".$guid;
+               $msg["key"] = self::key($msg["author"]);
 
-       return 'https://'.substr($addr,strpos($addr,'@')+1).'/posts/'.$guid;
-}
+               return $msg;
+       }
 
-function diaspora_repair_signature($signature, $handle = "", $level = 1) {
+       private function parent_item($uid, $guid, $author, $contact) {
+               $r = q("SELECT `id`, `body`, `wall`, `uri`, `private`, `origin`,
+                               `author-name`, `author-link`, `author-avatar`,
+                               `owner-name`, `owner-link`, `owner-avatar`
+                       FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
+                       intval($uid), dbesc($guid));
 
-       if ($signature == "")
-               return($signature);
+               if(!$r) {
+                       $result = self::store_by_guid($guid, $contact["url"], $uid);
 
-       if (base64_encode(base64_decode(base64_decode($signature))) == base64_decode($signature)) {
-               $signature = base64_decode($signature);
-               logger("Repaired double encoded signature from Diaspora/Hubzilla handle ".$handle." - level ".$level, LOGGER_DEBUG);
+                       if (!$result) {
+                               $person = self::person_by_handle($author);
+                               $result = self::store_by_guid($guid, $person["url"], $uid);
+                       }
 
-               // Do a recursive call to be able to fix even multiple levels
-               if ($level < 10)
-                       $signature = diaspora_repair_signature($signature, $handle, ++$level);
-       }
+                       if ($result) {
+                               logger("Fetched missing item ".$guid." - result: ".$result, LOGGER_DEBUG);
 
-       return($signature);
-}
+                               $r = q("SELECT `id`, `body`, `wall`, `uri`, `private`, `origin`,
+                                               `author-name`, `author-link`, `author-avatar`,
+                                               `owner-name`, `owner-link`, `owner-avatar`
+                                       FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
+                                       intval($uid), dbesc($guid));
+                       }
+               }
 
-function diaspora_post($importer,$xml,$msg) {
+               if (!$r) {
+                       logger("parent item not found: parent: ".$guid." - user: ".$uid);
+                       return false;
+               } else {
+                       logger("parent item found: parent: ".$guid." - user: ".$uid);
+                       return $r[0];
+               }
+       }
 
-       $a = get_app();
-       $guid = notags(unxmlify($xml->guid));
-       $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
+       private function author_contact_by_url($contact, $person, $uid) {
 
-       if($diaspora_handle != $msg['author']) {
-               logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
-               return 202;
-       }
+               $r = q("SELECT `id`, `network` FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d LIMIT 1",
+                       dbesc(normalise_link($person["url"])), intval($uid));
+               if ($r) {
+                       $cid = $r[0]["id"];
+                       $network = $r[0]["network"];
+               } else {
+                       $cid = $contact["id"];
+                       $network = NETWORK_DIASPORA;
+               }
 
-       $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
-       if(! $contact) {
-               logger('diaspora_post: A Contact for handle '.$diaspora_handle.' and user '.$importer['uid'].' was not found');
-               return 203;
+               return (array("cid" => $cid, "network" => $network));
        }
 
-       if(! diaspora_post_allow($importer,$contact, false)) {
-               logger('diaspora_post: Ignoring this author.');
-               return 202;
+       public static function is_redmatrix($url) {
+               return(strstr($url, "/channel/"));
        }
 
-       $message_id = $diaspora_handle . ':' . $guid;
-       $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-               intval($importer['uid']),
-               dbesc($guid)
-       );
-       if(count($r)) {
-               logger('diaspora_post: message exists: ' . $guid);
-               return 208;
-       }
+       private function plink($addr, $guid) {
+               $r = q("SELECT `url`, `nick`, `network` FROM `fcontact` WHERE `addr`='%s' LIMIT 1", dbesc($addr));
 
-       $created = unxmlify($xml->created_at);
-       $private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
+               // Fallback
+               if (!$r)
+                       return "https://".substr($addr,strpos($addr,"@")+1)."/posts/".$guid;
 
-       $body = diaspora2bb($xml->raw_message);
+               // Friendica contacts are often detected as Diaspora contacts in the "fcontact" table
+               // So we try another way as well.
+               $s = q("SELECT `network` FROM `gcontact` WHERE `nurl`='%s' LIMIT 1", dbesc(normalise_link($r[0]["url"])));
+               if ($s)
+                       $r[0]["network"] = $s[0]["network"];
 
-       $datarray = array();
+               if ($r[0]["network"] == NETWORK_DFRN)
+                       return(str_replace("/profile/".$r[0]["nick"]."/", "/display/".$guid, $r[0]["url"]."/"));
 
-       $datarray["object"] = json_encode($xml);
+               if (self::is_redmatrix($r[0]["url"]))
+                       return $r[0]["url"]."/?f=&mid=".$guid;
 
-       if($xml->photo->remote_photo_path AND $xml->photo->remote_photo_name)
-               $datarray["object-type"] = ACTIVITY_OBJ_PHOTO;
-       else {
-               $datarray['object-type'] = ACTIVITY_OBJ_NOTE;
-               // Add OEmbed and other information to the body
-               if (!diaspora_is_redmatrix($contact['url']))
-                       $body = add_page_info_to_body($body, false, true);
+               return "https://".substr($addr,strpos($addr,"@")+1)."/posts/".$guid;
        }
 
-       $str_tags = '';
+       private function receive_account_deletion($importer, $data) {
+               $author = notags(unxmlify($data->author));
 
-       $cnt = preg_match_all('/@\[url=(.*?)\[\/url\]/ism',$body,$matches,PREG_SET_ORDER);
-       if($cnt) {
-               foreach($matches as $mtch) {
-                       if(strlen($str_tags))
-                               $str_tags .= ',';
-                       $str_tags .= '@[url=' . $mtch[1] . '[/url]';
+               $contact = self::contact_by_handle($importer["uid"], $author);
+               if (!$contact) {
+                       logger("cannot find contact for author: ".$author);
+                       return false;
                }
-       }
-
-       $plink = diaspora_plink($diaspora_handle, $guid);
-
-       $datarray['uid'] = $importer['uid'];
-       $datarray['contact-id'] = $contact['id'];
-       $datarray['wall'] = 0;
-       $datarray['network'] = NETWORK_DIASPORA;
-       $datarray['verb'] = ACTIVITY_POST;
-       $datarray['guid'] = $guid;
-       $datarray['uri'] = $datarray['parent-uri'] = $message_id;
-       $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
-       $datarray['private'] = $private;
-       $datarray['parent'] = 0;
-       $datarray['plink'] = $plink;
-       $datarray['owner-name'] = $contact['name'];
-       $datarray['owner-link'] = $contact['url'];
-       //$datarray['owner-avatar'] = $contact['thumb'];
-       $datarray['owner-avatar'] = ((x($contact,'thumb')) ? $contact['thumb'] : $contact['photo']);
-       $datarray['author-name'] = $contact['name'];
-       $datarray['author-link'] = $contact['url'];
-       $datarray['author-avatar'] = $contact['thumb'];
-       $datarray['body'] = $body;
-       $datarray['tag'] = $str_tags;
-       if ($xml->provider_display_name)
-               $datarray["app"] = unxmlify($xml->provider_display_name);
-       else
-               $datarray['app']  = 'Diaspora';
-
-       // if empty content it might be a photo that hasn't arrived yet. If a photo arrives, we'll make it visible.
-
-       $datarray['visible'] = ((strlen($body)) ? 1 : 0);
-
-       DiasporaFetchGuid($datarray);
-       $message_id = item_store($datarray);
-
-       logger("Stored item with message id ".$message_id, LOGGER_DEBUG);
-
-       return 201;
-
-}
-
-function DiasporaFetchGuid($item) {
-       preg_replace_callback("&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
-               function ($match) use ($item){
-                       return(DiasporaFetchGuidSub($match, $item));
-               },$item["body"]);
-}
-
-function DiasporaFetchGuidSub($match, $item) {
-       $a = get_app();
 
-       if (!diaspora_store_by_guid($match[1], $item["author-link"]))
-               diaspora_store_by_guid($match[1], $item["owner-link"]);
-}
+               // We now remove the contact
+               contact_remove($contact["id"]);
+               return true;
+       }
 
-function diaspora_store_by_guid($guid, $server, $uid = 0) {
-       require_once("include/Contact.php");
+       private function receive_comment($importer, $sender, $data) {
+               $guid = notags(unxmlify($data->guid));
+               $parent_guid = notags(unxmlify($data->parent_guid));
+               $text = unxmlify($data->text);
+               $author = notags(unxmlify($data->author));
 
-       $serverparts = parse_url($server);
-       $server = $serverparts["scheme"]."://".$serverparts["host"];
+               $contact = self::allowed_contact_by_handle($importer, $sender, true);
+               if (!$contact)
+                       return false;
 
-       logger("Trying to fetch item ".$guid." from ".$server, LOGGER_DEBUG);
+               if (self::message_exists($importer["uid"], $guid))
+                       return false;
 
-       $item = diaspora_fetch_message($guid, $server);
+               $parent_item = self::parent_item($importer["uid"], $parent_guid, $author, $contact);
+               if (!$parent_item)
+                       return false;
 
-       if (!$item)
-               return false;
+               $person = self::person_by_handle($author);
+               if (!is_array($person)) {
+                       logger("unable to find author details");
+                       return false;
+               }
 
-       logger("Successfully fetched item ".$guid." from ".$server, LOGGER_DEBUG);
+               // Fetch the contact id - if we know this contact
+               $author_contact = self::author_contact_by_url($contact, $person, $importer["uid"]);
 
-       $body = $item["body"];
-       $str_tags = $item["tag"];
-       $app = $item["app"];
-       $created = $item["created"];
-       $author = $item["author"];
-       $guid = $item["guid"];
-       $private = $item["private"];
-       $object = $item["object"];
-       $objecttype = $item["object-type"];
+               $datarray = array();
 
-       $message_id = $author.':'.$guid;
-       $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-               intval($uid),
-               dbesc($guid)
-       );
-       if(count($r))
-               return $r[0]["id"];
+               $datarray["uid"] = $importer["uid"];
+               $datarray["contact-id"] = $author_contact["cid"];
+               $datarray["network"]  = $author_contact["network"];
 
-       $person = find_diaspora_person_by_handle($author);
+               $datarray["author-name"] = $person["name"];
+               $datarray["author-link"] = $person["url"];
+               $datarray["author-avatar"] = ((x($person,"thumb")) ? $person["thumb"] : $person["photo"]);
 
-       $contact_id = get_contact($person['url'], $uid);
+               $datarray["owner-name"] = $contact["name"];
+               $datarray["owner-link"] = $contact["url"];
+               $datarray["owner-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
 
-       $contacts = q("SELECT * FROM `contact` WHERE `id` = %d", intval($contact_id));
-       $importers = q("SELECT * FROM `user` WHERE `uid` = %d", intval($uid));
+               $datarray["guid"] = $guid;
+               $datarray["uri"] = $author.":".$guid;
 
-       if ($contacts AND $importers)
-               if(!diaspora_post_allow($importers[0],$contacts[0], false)) {
-                       logger('Ignoring author '.$person['url'].' for uid '.$uid);
-                       return false;
-               } else
-                       logger('Author '.$person['url'].' is allowed for uid '.$uid);
-
-       $datarray = array();
-       $datarray['uid'] = $uid;
-       $datarray['contact-id'] = $contact_id;
-       $datarray['wall'] = 0;
-       $datarray['network']  = NETWORK_DIASPORA;
-       $datarray['guid'] = $guid;
-       $datarray['uri'] = $datarray['parent-uri'] = $message_id;
-       $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
-       $datarray['private'] = $private;
-       $datarray['parent'] = 0;
-       $datarray['plink'] = diaspora_plink($author, $guid);
-       $datarray['author-name'] = $person['name'];
-       $datarray['author-link'] = $person['url'];
-       $datarray['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
-       $datarray['owner-name'] = $datarray['author-name'];
-       $datarray['owner-link'] = $datarray['author-link'];
-       $datarray['owner-avatar'] = $datarray['author-avatar'];
-       $datarray['body'] = $body;
-       $datarray['tag'] = $str_tags;
-       $datarray['app']  = $app;
-       $datarray['visible'] = ((strlen($body)) ? 1 : 0);
-       $datarray['object'] = $object;
-       $datarray['object-type'] = $objecttype;
-
-       if ($datarray['contact-id'] == 0)
-               return false;
+               $datarray["type"] = "remote-comment";
+               $datarray["verb"] = ACTIVITY_POST;
+               $datarray["gravity"] = GRAVITY_COMMENT;
+               $datarray["parent-uri"] = $parent_item["uri"];
 
-       DiasporaFetchGuid($datarray);
-       $message_id = item_store($datarray);
+               $datarray["object-type"] = ACTIVITY_OBJ_COMMENT;
+               $datarray["object"] = json_encode($data);
 
-       /// @TODO
-       /// Looking if there is some subscribe mechanism in Diaspora to get all comments for this post
+               $datarray["body"] = diaspora2bb($text);
 
-       return $message_id;
-}
+               self::fetch_guid($datarray);
 
-function diaspora_fetch_message($guid, $server, $level = 0) {
+               $message_id = item_store($datarray);
 
-       if ($level > 5)
-               return false;
+               if ($message_id)
+                       logger("Stored comment ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
 
-       $a = get_app();
+               // If we are the origin of the parent we store the original data and notify our followers
+               if($message_id AND $parent_item["origin"]) {
 
-       // This will not work if the server is not a Diaspora server
-       $source_url = $server.'/p/'.$guid.'.xml';
-       $x = fetch_url($source_url);
-       if(!$x)
-               return false;
+                       // Formerly we stored the signed text, the signature and the author in different fields.
+                       // We now store the raw data so that we are more flexible.
+                       q("INSERT INTO `sign` (`iid`,`signed_text`) VALUES (%d,'%s')",
+                               intval($message_id),
+                               dbesc(json_encode($data))
+                       );
 
-       $x = str_replace(array('<activity_streams-photo>','</activity_streams-photo>'),array('<asphoto>','</asphoto>'),$x);
-       $source_xml = parse_xml_string($x,false);
+                       // notify others
+                       proc_run("php", "include/notifier.php", "comment-import", $message_id);
+               }
 
-       $item = array();
-       $item["app"] = 'Diaspora';
-       $item["guid"] = $guid;
-       $body = "";
+               return $message_id;
+       }
 
-       if ($source_xml->post->status_message->created_at)
-               $item["created"] = unxmlify($source_xml->post->status_message->created_at);
+       private function receive_conversation_message($importer, $contact, $data, $msg, $mesg, $conversation) {
+               $guid = notags(unxmlify($data->guid));
+               $subject = notags(unxmlify($data->subject));
+               $author = notags(unxmlify($data->author));
 
-       if ($source_xml->post->status_message->provider_display_name)
-               $item["app"] = unxmlify($source_xml->post->status_message->provider_display_name);
+               $reply = 0;
 
-       if ($source_xml->post->status_message->diaspora_handle)
-               $item["author"] = unxmlify($source_xml->post->status_message->diaspora_handle);
+               $msg_guid = notags(unxmlify($mesg->guid));
+               $msg_parent_guid = notags(unxmlify($mesg->parent_guid));
+               $msg_parent_author_signature = notags(unxmlify($mesg->parent_author_signature));
+               $msg_author_signature = notags(unxmlify($mesg->author_signature));
+               $msg_text = unxmlify($mesg->text);
+               $msg_created_at = datetime_convert("UTC", "UTC", notags(unxmlify($mesg->created_at)));
+
+               // "diaspora_handle" is the element name from the old version
+               // "author" is the element name from the new version
+               if ($mesg->author)
+                       $msg_author = notags(unxmlify($mesg->author));
+               elseif ($mesg->diaspora_handle)
+                       $msg_author = notags(unxmlify($mesg->diaspora_handle));
+               else
+                       return false;
 
-       if ($source_xml->post->status_message->guid)
-               $item["guid"] = unxmlify($source_xml->post->status_message->guid);
+               $msg_conversation_guid = notags(unxmlify($mesg->conversation_guid));
 
-       $item["private"] = (unxmlify($source_xml->post->status_message->public) == 'false');
-       $item["object"] = json_encode($source_xml->post);
+               if($msg_conversation_guid != $guid) {
+                       logger("message conversation guid does not belong to the current conversation.");
+                       return false;
+               }
 
-       if(strlen($source_xml->post->asphoto->objectId) && ($source_xml->post->asphoto->objectId != 0) && ($source_xml->post->asphoto->image_url)) {
-               $item["object-type"] = ACTIVITY_OBJ_PHOTO;
-               $body = '[url=' . notags(unxmlify($source_xml->post->asphoto->image_url)) . '][img]' . notags(unxmlify($source_xml->post->asphoto->objectId)) . '[/img][/url]' . "\n";
-               $body = scale_external_images($body,false);
-       } elseif($source_xml->post->asphoto->image_url) {
-               $item["object-type"] = ACTIVITY_OBJ_PHOTO;
-               $body = '[img]' . notags(unxmlify($source_xml->post->asphoto->image_url)) . '[/img]' . "\n";
-               $body = scale_external_images($body);
-       } elseif($source_xml->post->status_message) {
-               $body = diaspora2bb($source_xml->post->status_message->raw_message);
+               $body = diaspora2bb($msg_text);
+               $message_uri = $msg_author.":".$msg_guid;
 
-               // Checking for embedded pictures
-               if($source_xml->post->status_message->photo->remote_photo_path AND
-                       $source_xml->post->status_message->photo->remote_photo_name) {
+               $author_signed_data = $msg_guid.";".$msg_parent_guid.";".$msg_text.";".unxmlify($mesg->created_at).";".$msg_author.";".$msg_conversation_guid;
 
-                       $item["object-type"] = ACTIVITY_OBJ_PHOTO;
+               $author_signature = base64_decode($msg_author_signature);
 
-                       $remote_photo_path = notags(unxmlify($source_xml->post->status_message->photo->remote_photo_path));
-                       $remote_photo_name = notags(unxmlify($source_xml->post->status_message->photo->remote_photo_name));
+               if(strcasecmp($msg_author,$msg["author"]) == 0) {
+                       $person = $contact;
+                       $key = $msg["key"];
+               } else {
+                       $person = self::person_by_handle($msg_author);
 
-                       $body = '[img]'.$remote_photo_path.$remote_photo_name.'[/img]'."\n".$body;
+                       if (is_array($person) && x($person, "pubkey"))
+                               $key = $person["pubkey"];
+                       else {
+                               logger("unable to find author details");
+                                       return false;
+                       }
+               }
 
-                       logger('embedded picture link found: '.$body, LOGGER_DEBUG);
-               } else
-                       $item["object-type"] = ACTIVITY_OBJ_NOTE;
-
-               $body = scale_external_images($body);
-
-               // Add OEmbed and other information to the body
-               /// @TODO It could be a repeated redmatrix item
-               /// Then we shouldn't add further data to it
-               if ($item["object-type"] == ACTIVITY_OBJ_NOTE)
-                       $body = add_page_info_to_body($body, false, true);
-
-       } elseif($source_xml->post->reshare) {
-               // Reshare of a reshare
-               return diaspora_fetch_message($source_xml->post->reshare->root_guid, $server, ++$level);
-       } else {
-               // Maybe it is a reshare of a photo that will be delivered at a later time (testing)
-               logger('no content found: '.print_r($source_xml,true));
-               return false;
-       }
+               if (!rsa_verify($author_signed_data, $author_signature, $key, "sha256")) {
+                       logger("verification failed.");
+                       return false;
+               }
 
-       if (trim($body) == "")
-               return false;
+               if($msg_parent_author_signature) {
+                       $owner_signed_data = $msg_guid.";".$msg_parent_guid.";".$msg_text.";".unxmlify($mesg->created_at).";".$msg_author.";".$msg_conversation_guid;
 
-       $item["tag"] = '';
-       $item["body"] = $body;
+                       $parent_author_signature = base64_decode($msg_parent_author_signature);
 
-       return $item;
-}
+                       $key = $msg["key"];
 
-function diaspora_reshare($importer,$xml,$msg) {
+                       if (!rsa_verify($owner_signed_data, $parent_author_signature, $key, "sha256")) {
+                               logger("owner verification failed.");
+                               return false;
+                       }
+               }
 
-       logger('diaspora_reshare: init: ' . print_r($xml,true));
+               $r = q("SELECT `id` FROM `mail` WHERE `uri` = '%s' LIMIT 1",
+                       dbesc($message_uri)
+               );
+               if($r) {
+                       logger("duplicate message already delivered.", LOGGER_DEBUG);
+                       return false;
+               }
 
-       $a = get_app();
-       $guid = notags(unxmlify($xml->guid));
-       $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
+               q("INSERT INTO `mail` (`uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`)
+                       VALUES (%d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
+                       intval($importer["uid"]),
+                       dbesc($msg_guid),
+                       intval($conversation["id"]),
+                       dbesc($person["name"]),
+                       dbesc($person["photo"]),
+                       dbesc($person["url"]),
+                       intval($contact["id"]),
+                       dbesc($subject),
+                       dbesc($body),
+                       0,
+                       0,
+                       dbesc($message_uri),
+                       dbesc($author.":".$guid),
+                       dbesc($msg_created_at)
+               );
 
+               q("UPDATE `conv` SET `updated` = '%s' WHERE `id` = %d",
+                       dbesc(datetime_convert()),
+                       intval($conversation["id"])
+               );
 
-       if($diaspora_handle != $msg['author']) {
-               logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
-               return 202;
+               notification(array(
+                       "type" => NOTIFY_MAIL,
+                       "notify_flags" => $importer["notify-flags"],
+                       "language" => $importer["language"],
+                       "to_name" => $importer["username"],
+                       "to_email" => $importer["email"],
+                       "uid" =>$importer["uid"],
+                       "item" => array("subject" => $subject, "body" => $body),
+                       "source_name" => $person["name"],
+                       "source_link" => $person["url"],
+                       "source_photo" => $person["thumb"],
+                       "verb" => ACTIVITY_POST,
+                       "otype" => "mail"
+               ));
        }
 
-       $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
-       if(! $contact)
-               return;
-
-       if(! diaspora_post_allow($importer,$contact, false)) {
-               logger('diaspora_reshare: Ignoring this author: ' . $diaspora_handle . ' ' . print_r($xml,true));
-               return 202;
-       }
+       private function receive_conversation($importer, $msg, $data) {
+               $guid = notags(unxmlify($data->guid));
+               $subject = notags(unxmlify($data->subject));
+               $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
+               $author = notags(unxmlify($data->author));
+               $participants = notags(unxmlify($data->participants));
 
-       $message_id = $diaspora_handle . ':' . $guid;
-       $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-               intval($importer['uid']),
-               dbesc($guid)
-       );
-       if(count($r)) {
-               logger('diaspora_reshare: message exists: ' . $guid);
-               return;
-       }
+               $messages = $data->message;
 
-       $orig_author = notags(unxmlify($xml->root_diaspora_id));
-       $orig_guid = notags(unxmlify($xml->root_guid));
-       $orig_url = $a->get_baseurl()."/display/".$orig_guid;
-
-       $create_original_post = false;
-
-       // Do we already have this item?
-       $r = q("SELECT `body`, `tag`, `app`, `created`, `plink`, `object`, `object-type`, `uri` FROM `item` WHERE `guid` = '%s' AND `visible` AND NOT `deleted` AND `body` != '' LIMIT 1",
-               dbesc($orig_guid),
-               dbesc(NETWORK_DIASPORA)
-       );
-       if(count($r)) {
-               logger('reshared message '.$orig_guid." reshared by ".$guid.' already exists on system.');
-
-               // Maybe it is already a reshared item?
-               // Then refetch the content, since there can be many side effects with reshared posts from other networks or reshares from reshares
-               require_once('include/api.php');
-               if (api_share_as_retweet($r[0]))
-                       $r = array();
-               else {
-                       $body = $r[0]["body"];
-                       $str_tags = $r[0]["tag"];
-                       $app = $r[0]["app"];
-                       $orig_created = $r[0]["created"];
-                       $orig_plink = $r[0]["plink"];
-                       $orig_uri = $r[0]["uri"];
-                       $object = $r[0]["object"];
-                       $objecttype = $r[0]["object-type"];
+               if (!count($messages)) {
+                       logger("empty conversation");
+                       return false;
                }
-       }
 
-       if (!count($r)) {
-               $body = "";
-               $str_tags = "";
-               $app = "";
+               $contact = self::allowed_contact_by_handle($importer, $msg["author"], true);
+               if (!$contact)
+                       return false;
 
-               $server = 'https://'.substr($orig_author,strpos($orig_author,'@')+1);
-               logger('1st try: reshared message '.$orig_guid." reshared by ".$guid.' will be fetched from original server: '.$server);
-               $item = diaspora_fetch_message($orig_guid, $server);
+               $conversation = null;
 
-               if (!$item) {
-                       $server = 'https://'.substr($diaspora_handle,strpos($diaspora_handle,'@')+1);
-                       logger('2nd try: reshared message '.$orig_guid." reshared by ".$guid." will be fetched from sharer's server: ".$server);
-                       $item = diaspora_fetch_message($orig_guid, $server);
-               }
-               if (!$item) {
-                       $server = 'http://'.substr($orig_author,strpos($orig_author,'@')+1);
-                       logger('3rd try: reshared message '.$orig_guid." reshared by ".$guid.' will be fetched from original server: '.$server);
-                       $item = diaspora_fetch_message($orig_guid, $server);
+               $c = q("SELECT * FROM `conv` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
+                       intval($importer["uid"]),
+                       dbesc($guid)
+               );
+               if($c)
+                       $conversation = $c[0];
+               else {
+                       $r = q("INSERT INTO `conv` (`uid`, `guid`, `creator`, `created`, `updated`, `subject`, `recips`)
+                               VALUES (%d, '%s', '%s', '%s', '%s', '%s', '%s')",
+                               intval($importer["uid"]),
+                               dbesc($guid),
+                               dbesc($author),
+                               dbesc(datetime_convert("UTC", "UTC", $created_at)),
+                               dbesc(datetime_convert()),
+                               dbesc($subject),
+                               dbesc($participants)
+                       );
+                       if($r)
+                               $c = q("SELECT * FROM `conv` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
+                                       intval($importer["uid"]),
+                                       dbesc($guid)
+                               );
+
+                       if($c)
+                               $conversation = $c[0];
                }
-               if (!$item) {
-                       $server = 'http://'.substr($diaspora_handle,strpos($diaspora_handle,'@')+1);
-                       logger('4th try: reshared message '.$orig_guid." reshared by ".$guid." will be fetched from sharer's server: ".$server);
-                       $item = diaspora_fetch_message($orig_guid, $server);
+               if (!$conversation) {
+                       logger("unable to create conversation.");
+                       return;
                }
 
-               if ($item) {
-                       $body = $item["body"];
-                       $str_tags = $item["tag"];
-                       $app = $item["app"];
-                       $orig_created = $item["created"];
-                       $orig_author = $item["author"];
-                       $orig_guid = $item["guid"];
-                       $orig_plink = diaspora_plink($orig_author, $orig_guid);
-                       $orig_uri = $orig_author.':'.$orig_guid;
-                       $create_original_post = ($body != "");
-                       $object = $item["object"];
-                       $objecttype = $item["object-type"];
-               }
-       }
+               foreach($messages as $mesg)
+                       self::receive_conversation_message($importer, $contact, $data, $msg, $mesg, $conversation);
 
-       $plink = diaspora_plink($diaspora_handle, $guid);
-
-       $person = find_diaspora_person_by_handle($orig_author);
-
-       $created = unxmlify($xml->created_at);
-       $private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
-
-       $datarray = array();
-
-       $datarray['uid'] = $importer['uid'];
-       $datarray['contact-id'] = $contact['id'];
-       $datarray['wall'] = 0;
-       $datarray['network']  = NETWORK_DIASPORA;
-       $datarray['guid'] = $guid;
-       $datarray['uri'] = $datarray['parent-uri'] = $message_id;
-       $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
-       $datarray['private'] = $private;
-       $datarray['parent'] = 0;
-       $datarray['plink'] = $plink;
-       $datarray['owner-name'] = $contact['name'];
-       $datarray['owner-link'] = $contact['url'];
-       $datarray['owner-avatar'] = ((x($contact,'thumb')) ? $contact['thumb'] : $contact['photo']);
-       if (!intval(get_config('system','wall-to-wall_share'))) {
-               $prefix = share_header($person['name'], $person['url'], ((x($person,'thumb')) ? $person['thumb'] : $person['photo']), $orig_guid, $orig_created, $orig_url);
-
-               $datarray['author-name'] = $contact['name'];
-               $datarray['author-link'] = $contact['url'];
-               $datarray['author-avatar'] = $contact['thumb'];
-               $datarray['body'] = $prefix.$body."[/share]";
-       } else {
-               // Let reshared messages look like wall-to-wall posts
-               $datarray['author-name'] = $person['name'];
-               $datarray['author-link'] = $person['url'];
-               $datarray['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
-               $datarray['body'] = $body;
+               return true;
        }
 
-       $datarray["object"] = json_encode($xml);
-       $datarray['object-type'] = $objecttype;
-
-       $datarray['tag'] = $str_tags;
-       $datarray['app']  = $app;
-
-       // if empty content it might be a photo that hasn't arrived yet. If a photo arrives, we'll make it visible. (testing)
-       $datarray['visible'] = ((strlen($body)) ? 1 : 0);
-
-       // Store the original item of a reshare
-       if ($create_original_post) {
-               require_once("include/Contact.php");
-
-               $datarray2 = $datarray;
-
-               $datarray2['uid'] = 0;
-               $datarray2['contact-id'] = get_contact($person['url'], 0);
-               $datarray2['guid'] = $orig_guid;
-               $datarray2['uri'] = $datarray2['parent-uri'] = $orig_uri;
-               $datarray2['changed'] = $datarray2['created'] = $datarray2['edited'] = $datarray2['commented'] = $datarray2['received'] = datetime_convert('UTC','UTC',$orig_created);
-               $datarray2['parent'] = 0;
-               $datarray2['plink'] = $orig_plink;
-
-               $datarray2['author-name'] = $person['name'];
-               $datarray2['author-link'] = $person['url'];
-               $datarray2['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
-               $datarray2['owner-name'] = $datarray2['author-name'];
-               $datarray2['owner-link'] = $datarray2['author-link'];
-               $datarray2['owner-avatar'] = $datarray2['author-avatar'];
-               $datarray2['body'] = $body;
-               $datarray2["object"] = $object;
+       private function construct_like_body($contact, $parent_item, $guid) {
+               $bodyverb = t('%1$s likes %2$s\'s %3$s');
 
-               DiasporaFetchGuid($datarray2);
-               $message_id = item_store($datarray2);
+               $ulink = "[url=".$contact["url"]."]".$contact["name"]."[/url]";
+               $alink = "[url=".$parent_item["author-link"]."]".$parent_item["author-name"]."[/url]";
+               $plink = "[url=".App::get_baseurl()."/display/".urlencode($guid)."]".t("status")."[/url]";
 
-               logger("Store original item ".$orig_guid." under message id ".$message_id);
+               return sprintf($bodyverb, $ulink, $alink, $plink);
        }
 
-       DiasporaFetchGuid($datarray);
-       $message_id = item_store($datarray);
+       private function construct_like_object($importer, $parent_item) {
+               $objtype = ACTIVITY_OBJ_NOTE;
+               $link = '<link rel="alternate" type="text/html" href="'.App::get_baseurl()."/display/".$importer["nickname"]."/".$parent_item["id"].'" />';
+               $parent_body = $parent_item["body"];
 
-       return;
-
-}
+               $xmldata = array("object" => array("type" => $objtype,
+                                               "local" => "1",
+                                               "id" => $parent_item["uri"],
+                                               "link" => $link,
+                                               "title" => "",
+                                               "content" => $parent_body));
 
+               return xml::from_array($xmldata, $xml, true);
+       }
 
-function diaspora_asphoto($importer,$xml,$msg) {
-       logger('diaspora_asphoto called');
+       private function receive_like($importer, $sender, $data) {
+               $positive = notags(unxmlify($data->positive));
+               $guid = notags(unxmlify($data->guid));
+               $parent_type = notags(unxmlify($data->parent_type));
+               $parent_guid = notags(unxmlify($data->parent_guid));
+               $author = notags(unxmlify($data->author));
 
-       $a = get_app();
-       $guid = notags(unxmlify($xml->guid));
-       $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
+               // likes on comments aren't supported by Diaspora - only on posts
+               // But maybe this will be supported in the future, so we will accept it.
+               if (!in_array($parent_type, array("Post", "Comment")))
+                       return false;
 
-       if($diaspora_handle != $msg['author']) {
-               logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
-               return 202;
-       }
+               $contact = self::allowed_contact_by_handle($importer, $sender, true);
+               if (!$contact)
+                       return false;
 
-       $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
-       if(! $contact)
-               return;
+               if (self::message_exists($importer["uid"], $guid))
+                       return false;
 
-       if(! diaspora_post_allow($importer,$contact, false)) {
-               logger('diaspora_asphoto: Ignoring this author.');
-               return 202;
-       }
+               $parent_item = self::parent_item($importer["uid"], $parent_guid, $author, $contact);
+               if (!$parent_item)
+                       return false;
 
-       $message_id = $diaspora_handle . ':' . $guid;
-       $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-               intval($importer['uid']),
-               dbesc($guid)
-       );
-       if(count($r)) {
-               logger('diaspora_asphoto: message exists: ' . $guid);
-               return;
-       }
+               $person = self::person_by_handle($author);
+               if (!is_array($person)) {
+                       logger("unable to find author details");
+                       return false;
+               }
 
-       $created = unxmlify($xml->created_at);
-       $private = ((unxmlify($xml->public) == 'false') ? 1 : 0);
+               // Fetch the contact id - if we know this contact
+               $author_contact = self::author_contact_by_url($contact, $person, $importer["uid"]);
 
-       if(strlen($xml->objectId) && ($xml->objectId != 0) && ($xml->image_url)) {
-               $body = '[url=' . notags(unxmlify($xml->image_url)) . '][img]' . notags(unxmlify($xml->objectId)) . '[/img][/url]' . "\n";
-               $body = scale_external_images($body,false);
-       }
-       elseif($xml->image_url) {
-               $body = '[img]' . notags(unxmlify($xml->image_url)) . '[/img]' . "\n";
-               $body = scale_external_images($body);
-       }
-       else {
-               logger('diaspora_asphoto: no photo url found.');
-               return;
-       }
+               // "positive" = "false" would be a Dislike - wich isn't currently supported by Diaspora
+               // We would accept this anyhow.
+               if ($positive === "true")
+                       $verb = ACTIVITY_LIKE;
+               else
+                       $verb = ACTIVITY_DISLIKE;
 
-       $plink = diaspora_plink($diaspora_handle, $guid);
-
-       $datarray = array();
-
-       $datarray['uid'] = $importer['uid'];
-       $datarray['contact-id'] = $contact['id'];
-       $datarray['wall'] = 0;
-       $datarray['network']  = NETWORK_DIASPORA;
-       $datarray['guid'] = $guid;
-       $datarray['uri'] = $datarray['parent-uri'] = $message_id;
-       $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert('UTC','UTC',$created);
-       $datarray['private'] = $private;
-       $datarray['parent'] = 0;
-       $datarray['plink'] = $plink;
-       $datarray['owner-name'] = $contact['name'];
-       $datarray['owner-link'] = $contact['url'];
-       //$datarray['owner-avatar'] = $contact['thumb'];
-       $datarray['owner-avatar'] = ((x($contact,'thumb')) ? $contact['thumb'] : $contact['photo']);
-       $datarray['author-name'] = $contact['name'];
-       $datarray['author-link'] = $contact['url'];
-       $datarray['author-avatar'] = $contact['thumb'];
-       $datarray['body'] = $body;
-       $datarray["object"] = json_encode($xml);
-       $datarray['object-type'] = ACTIVITY_OBJ_PHOTO;
-
-       $datarray['app']  = 'Diaspora/Cubbi.es';
-
-       DiasporaFetchGuid($datarray);
-       $message_id = item_store($datarray);
-
-       //if($message_id) {
-       //      q("update item set plink = '%s' where id = %d",
-       //              dbesc($a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $message_id),
-       //              intval($message_id)
-       //      );
-       //}
-
-       return;
+               $datarray = array();
 
-}
+               $datarray["uid"] = $importer["uid"];
+               $datarray["contact-id"] = $author_contact["cid"];
+               $datarray["network"]  = $author_contact["network"];
 
-function diaspora_comment($importer,$xml,$msg) {
+               $datarray["author-name"] = $person["name"];
+               $datarray["author-link"] = $person["url"];
+               $datarray["author-avatar"] = ((x($person,"thumb")) ? $person["thumb"] : $person["photo"]);
 
-       $a = get_app();
-       $guid = notags(unxmlify($xml->guid));
-       $parent_guid = notags(unxmlify($xml->parent_guid));
-       $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
-       $target_type = notags(unxmlify($xml->target_type));
-       $text = unxmlify($xml->text);
-       $author_signature = notags(unxmlify($xml->author_signature));
+               $datarray["owner-name"] = $contact["name"];
+               $datarray["owner-link"] = $contact["url"];
+               $datarray["owner-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
 
-       $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : '');
+               $datarray["guid"] = $guid;
+               $datarray["uri"] = $author.":".$guid;
 
-       $contact = diaspora_get_contact_by_handle($importer['uid'],$msg['author']);
-       if(! $contact) {
-               logger('diaspora_comment: cannot find contact: ' . $msg['author']);
-               return;
-       }
-
-       if(! diaspora_post_allow($importer,$contact, true)) {
-               logger('diaspora_comment: Ignoring this author.');
-               return 202;
-       }
+               $datarray["type"] = "activity";
+               $datarray["verb"] = $verb;
+               $datarray["gravity"] = GRAVITY_LIKE;
+               $datarray["parent-uri"] = $parent_item["uri"];
 
-       $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-               intval($importer['uid']),
-               dbesc($guid)
-       );
-       if(count($r)) {
-               logger('diaspora_comment: our comment just got relayed back to us (or there was a guid collision) : ' . $guid);
-               return;
-       }
+               $datarray["object-type"] = ACTIVITY_OBJ_NOTE;
+               $datarray["object"] = self::construct_like_object($importer, $parent_item);
 
-       $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-               intval($importer['uid']),
-               dbesc($parent_guid)
-       );
+               $datarray["body"] = self::construct_like_body($contact, $parent_item, $guid);
 
-       if(!count($r)) {
-               $result = diaspora_store_by_guid($parent_guid, $contact['url'], $importer['uid']);
+               $message_id = item_store($datarray);
 
-               if (!$result) {
-                       $person = find_diaspora_person_by_handle($diaspora_handle);
-                       $result = diaspora_store_by_guid($parent_guid, $person['url'], $importer['uid']);
-               }
+               if ($message_id)
+                       logger("Stored like ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
 
-               if ($result) {
-                       logger("Fetched missing item ".$parent_guid." - result: ".$result, LOGGER_DEBUG);
+               // If we are the origin of the parent we store the original data and notify our followers
+               if($message_id AND $parent_item["origin"]) {
 
-                       $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-                               intval($importer['uid']),
-                               dbesc($parent_guid)
+                       // Formerly we stored the signed text, the signature and the author in different fields.
+                       // We now store the raw data so that we are more flexible.
+                       q("INSERT INTO `sign` (`iid`,`signed_text`) VALUES (%d,'%s')",
+                               intval($message_id),
+                               dbesc(json_encode($data))
                        );
+
+                       // notify others
+                       proc_run("php", "include/notifier.php", "comment-import", $message_id);
                }
-       }
 
-       if(! count($r)) {
-               logger('diaspora_comment: parent item not found: parent: ' . $parent_guid . ' item: ' . $guid);
-               return;
+               return $message_id;
        }
-       $parent_item = $r[0];
 
+       private function receive_message($importer, $data) {
+               $guid = notags(unxmlify($data->guid));
+               $parent_guid = notags(unxmlify($data->parent_guid));
+               $text = unxmlify($data->text);
+               $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
+               $author = notags(unxmlify($data->author));
+               $conversation_guid = notags(unxmlify($data->conversation_guid));
 
-       /* How Diaspora performs comment signature checking:
+               $contact = self::allowed_contact_by_handle($importer, $author, true);
+               if (!$contact)
+                       return false;
 
-          - If an item has been sent by the comment author to the top-level post owner to relay on
-            to the rest of the contacts on the top-level post, the top-level post owner should check
-            the author_signature, then create a parent_author_signature before relaying the comment on
-          - If an item has been relayed on by the top-level post owner, the contacts who receive it
-            check only the parent_author_signature. Basically, they trust that the top-level post
-            owner has already verified the authenticity of anything he/she sends out
-          - In either case, the signature that get checked is the signature created by the person
-            who sent the salmon
-       */
+               $conversation = null;
 
-       $signed_data = $guid . ';' . $parent_guid . ';' . $text . ';' . $diaspora_handle;
-       $key = $msg['key'];
+               $c = q("SELECT * FROM `conv` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
+                       intval($importer["uid"]),
+                       dbesc($conversation_guid)
+               );
+               if($c)
+                       $conversation = $c[0];
+               else {
+                       logger("conversation not available.");
+                       return false;
+               }
 
-       if($parent_author_signature) {
-               // If a parent_author_signature exists, then we've received the comment
-               // relayed from the top-level post owner. There's no need to check the
-               // author_signature if the parent_author_signature is valid
+               $reply = 0;
 
-               $parent_author_signature = base64_decode($parent_author_signature);
+               $body = diaspora2bb($text);
+               $message_uri = $author.":".$guid;
 
-               if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
-                       logger('diaspora_comment: top-level owner verification failed.');
-                       return;
+               $person = self::person_by_handle($author);
+               if (!$person) {
+                       logger("unable to find author details");
+                       return false;
                }
-       }
-       else {
-               // If there's no parent_author_signature, then we've received the comment
-               // from the comment creator. In that case, the person is commenting on
-               // our post, so he/she must be a contact of ours and his/her public key
-               // should be in $msg['key']
-
-               $author_signature = base64_decode($author_signature);
 
-               if(! rsa_verify($signed_data,$author_signature,$key,'sha256')) {
-                       logger('diaspora_comment: comment author verification failed.');
-                       return;
+               $r = q("SELECT `id` FROM `mail` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
+                       dbesc($message_uri),
+                       intval($importer["uid"])
+               );
+               if($r) {
+                       logger("duplicate message already delivered.", LOGGER_DEBUG);
+                       return false;
                }
-       }
 
-       // Phew! Everything checks out. Now create an item.
+               q("INSERT INTO `mail` (`uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`)
+                               VALUES ( %d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
+                       intval($importer["uid"]),
+                       dbesc($guid),
+                       intval($conversation["id"]),
+                       dbesc($person["name"]),
+                       dbesc($person["photo"]),
+                       dbesc($person["url"]),
+                       intval($contact["id"]),
+                       dbesc($conversation["subject"]),
+                       dbesc($body),
+                       0,
+                       1,
+                       dbesc($message_uri),
+                       dbesc($author.":".$parent_guid),
+                       dbesc($created_at)
+               );
 
-       // Find the original comment author information.
-       // We need this to make sure we display the comment author
-       // information (name and avatar) correctly.
-       if(strcasecmp($diaspora_handle,$msg['author']) == 0)
-               $person = $contact;
-       else {
-               $person = find_diaspora_person_by_handle($diaspora_handle);
+               q("UPDATE `conv` SET `updated` = '%s' WHERE `id` = %d",
+                       dbesc(datetime_convert()),
+                       intval($conversation["id"])
+               );
 
-               if(! is_array($person)) {
-                       logger('diaspora_comment: unable to find author details');
-                       return;
-               }
+               return true;
        }
 
-       // Fetch the contact id - if we know this contact
-       $r = q("SELECT `id`, `network` FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d LIMIT 1",
-               dbesc(normalise_link($person['url'])), intval($importer['uid']));
-       if ($r) {
-               $cid = $r[0]['id'];
-               $network = $r[0]['network'];
-       } else {
-               $cid = $contact['id'];
-               $network = NETWORK_DIASPORA;
+       private function receive_participation($importer, $data) {
+               // I'm not sure if we can fully support this message type
+               return true;
        }
 
-       $body = diaspora2bb($text);
-       $message_id = $diaspora_handle . ':' . $guid;
-
-       $datarray = array();
-
-       $datarray['uid'] = $importer['uid'];
-       $datarray['contact-id'] = $cid;
-       $datarray['type'] = 'remote-comment';
-       $datarray['wall'] = $parent_item['wall'];
-       $datarray['network']  = $network;
-       $datarray['verb'] = ACTIVITY_POST;
-       $datarray['gravity'] = GRAVITY_COMMENT;
-       $datarray['guid'] = $guid;
-       $datarray['uri'] = $message_id;
-       $datarray['parent-uri'] = $parent_item['uri'];
-
-       // No timestamps for comments? OK, we'll the use current time.
-       $datarray['changed'] = $datarray['created'] = $datarray['edited'] = datetime_convert();
-       $datarray['private'] = $parent_item['private'];
-
-       $datarray['owner-name'] = $parent_item['owner-name'];
-       $datarray['owner-link'] = $parent_item['owner-link'];
-       $datarray['owner-avatar'] = $parent_item['owner-avatar'];
-
-       $datarray['author-name'] = $person['name'];
-       $datarray['author-link'] = $person['url'];
-       $datarray['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
-       $datarray['body'] = $body;
-       $datarray["object"] = json_encode($xml);
-       $datarray["object-type"] = ACTIVITY_OBJ_COMMENT;
-
-       // We can't be certain what the original app is if the message is relayed.
-       if(($parent_item['origin']) && (! $parent_author_signature))
-               $datarray['app']  = 'Diaspora';
-
-       DiasporaFetchGuid($datarray);
-       $message_id = item_store($datarray);
-
-       $datarray['id'] = $message_id;
-
-       //if($message_id) {
-               //q("update item set plink = '%s' where id = %d",
-               //      //dbesc($a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $message_id),
-               //      dbesc($a->get_baseurl().'/display/'.$datarray['guid']),
-               //      intval($message_id)
-               //);
-       //}
-
-       // If we are the origin of the parent we store the original signature and notify our followers
-       if($parent_item['origin']) {
-               $author_signature_base64 = base64_encode($author_signature);
-               $author_signature_base64 = diaspora_repair_signature($author_signature_base64, $diaspora_handle);
-
-               q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
-                       intval($message_id),
-                       dbesc($signed_data),
-                       dbesc($author_signature_base64),
-                       dbesc($diaspora_handle)
-               );
+       private function receive_photo($importer, $data) {
+               // There doesn't seem to be a reason for this function, since the photo data is transmitted in the status message as well
+               return true;
+       }
 
-               // notify others
-               proc_run('php','include/notifier.php','comment-import',$message_id);
+       private function receive_poll_participation($importer, $data) {
+               // We don't support polls by now
+               return true;
        }
 
-       return;
-}
+       private function receive_profile($importer, $data) {
+               $author = notags(unxmlify($data->author));
 
+               $contact = self::contact_by_handle($importer["uid"], $author);
+               if (!$contact)
+                       return;
 
+               $name = unxmlify($data->first_name).((strlen($data->last_name)) ? " ".unxmlify($data->last_name) : "");
+               $image_url = unxmlify($data->image_url);
+               $birthday = unxmlify($data->birthday);
+               $location = diaspora2bb(unxmlify($data->location));
+               $about = diaspora2bb(unxmlify($data->bio));
+               $gender = unxmlify($data->gender);
+               $searchable = (unxmlify($data->searchable) == "true");
+               $nsfw = (unxmlify($data->nsfw) == "true");
+               $tags = unxmlify($data->tag_string);
+
+               $tags = explode("#", $tags);
+
+               $keywords = array();
+               foreach ($tags as $tag) {
+                       $tag = trim(strtolower($tag));
+                       if ($tag != "")
+                               $keywords[] = $tag;
+               }
 
+               $keywords = implode(", ", $keywords);
 
-function diaspora_conversation($importer,$xml,$msg) {
+               $handle_parts = explode("@", $author);
+               $nick = $handle_parts[0];
 
-       $a = get_app();
+               if($name === "")
+                       $name = $handle_parts[0];
 
-       $guid = notags(unxmlify($xml->guid));
-       $subject = notags(unxmlify($xml->subject));
-       $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
-       $participant_handles = notags(unxmlify($xml->participant_handles));
-       $created_at = datetime_convert('UTC','UTC',notags(unxmlify($xml->created_at)));
+               if( preg_match("|^https?://|", $image_url) === 0)
+                       $image_url = "http://".$handle_parts[1].$image_url;
 
-       $parent_uri = $diaspora_handle . ':' . $guid;
+               update_contact_avatar($image_url, $importer["uid"], $contact["id"]);
 
-       $messages = $xml->message;
+               // Generic birthday. We don't know the timezone. The year is irrelevant.
 
-       if(! count($messages)) {
-               logger('diaspora_conversation: empty conversation');
-               return;
-       }
+               $birthday = str_replace("1000", "1901", $birthday);
 
-       $contact = diaspora_get_contact_by_handle($importer['uid'],$msg['author']);
-       if(! $contact) {
-               logger('diaspora_conversation: cannot find contact: ' . $msg['author']);
-               return;
-       }
+               if ($birthday != "")
+                       $birthday = datetime_convert("UTC", "UTC", $birthday, "Y-m-d");
 
-       if(($contact['rel'] == CONTACT_IS_FOLLOWER) || ($contact['blocked']) || ($contact['readonly'])) {
-               logger('diaspora_conversation: Ignoring this author.');
-               return 202;
-       }
+               // this is to prevent multiple birthday notifications in a single year
+               // if we already have a stored birthday and the 'm-d' part hasn't changed, preserve the entry, which will preserve the notify year
 
-       $conversation = null;
-
-       $c = q("select * from conv where uid = %d and guid = '%s' limit 1",
-               intval($importer['uid']),
-               dbesc($guid)
-       );
-       if(count($c))
-               $conversation = $c[0];
-       else {
-               $r = q("insert into conv (uid,guid,creator,created,updated,subject,recips) values(%d, '%s', '%s', '%s', '%s', '%s', '%s') ",
-                       intval($importer['uid']),
-                       dbesc($guid),
-                       dbesc($diaspora_handle),
-                       dbesc(datetime_convert('UTC','UTC',$created_at)),
+               if(substr($birthday,5) === substr($contact["bd"],5))
+                       $birthday = $contact["bd"];
+
+               $r = q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `addr` = '%s', `name-date` = '%s', `bd` = '%s',
+                               `location` = '%s', `about` = '%s', `keywords` = '%s', `gender` = '%s' WHERE `id` = %d AND `uid` = %d",
+                       dbesc($name),
+                       dbesc($nick),
+                       dbesc($author),
                        dbesc(datetime_convert()),
-                       dbesc($subject),
-                       dbesc($participant_handles)
+                       dbesc($birthday),
+                       dbesc($location),
+                       dbesc($about),
+                       dbesc($keywords),
+                       dbesc($gender),
+                       intval($contact["id"]),
+                       intval($importer["uid"])
                );
-               if($r)
-                       $c = q("select * from conv where uid = %d and guid = '%s' limit 1",
-               intval($importer['uid']),
-           dbesc($guid)
-       );
-           if(count($c))
-           $conversation = $c[0];
-       }
-       if(! $conversation) {
-               logger('diaspora_conversation: unable to create conversation.');
-               return;
-       }
-
-       foreach($messages as $mesg) {
-
-               $reply = 0;
 
-               $msg_guid = notags(unxmlify($mesg->guid));
-               $msg_parent_guid = notags(unxmlify($mesg->parent_guid));
-               $msg_parent_author_signature = notags(unxmlify($mesg->parent_author_signature));
-               $msg_author_signature = notags(unxmlify($mesg->author_signature));
-               $msg_text = unxmlify($mesg->text);
-               $msg_created_at = datetime_convert('UTC','UTC',notags(unxmlify($mesg->created_at)));
-               $msg_diaspora_handle = notags(unxmlify($mesg->diaspora_handle));
-               $msg_conversation_guid = notags(unxmlify($mesg->conversation_guid));
-               if($msg_conversation_guid != $guid) {
-                       logger('diaspora_conversation: message conversation guid does not belong to the current conversation. ' . $xml);
-                       continue;
+               if ($searchable) {
+                       poco_check($contact["url"], $name, NETWORK_DIASPORA, $image_url, $about, $location, $gender, $keywords, "",
+                               datetime_convert(), 2, $contact["id"], $importer["uid"]);
                }
 
-               $body = diaspora2bb($msg_text);
-               $message_id = $msg_diaspora_handle . ':' . $msg_guid;
-
-               $author_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($mesg->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid;
+               $gcontact = array("url" => $contact["url"], "network" => NETWORK_DIASPORA, "generation" => 2,
+                                       "photo" => $image_url, "name" => $name, "location" => $location,
+                                       "about" => $about, "birthday" => $birthday, "gender" => $gender,
+                                       "addr" => $author, "nick" => $nick, "keywords" => $keywords,
+                                       "hide" => !$searchable, "nsfw" => $nsfw);
 
-               $author_signature = base64_decode($msg_author_signature);
+               update_gcontact($gcontact);
 
-               if(strcasecmp($msg_diaspora_handle,$msg['author']) == 0) {
-                       $person = $contact;
-                       $key = $msg['key'];
-               }
-               else {
-                       $person = find_diaspora_person_by_handle($msg_diaspora_handle); 
+               logger("Profile of contact ".$contact["id"]." stored for user ".$importer["uid"], LOGGER_DEBUG);
 
-                       if(is_array($person) && x($person,'pubkey'))
-                               $key = $person['pubkey'];
-                       else {
-                               logger('diaspora_conversation: unable to find author details');
-                               continue;
-                       }
-               }
-
-               if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
-                       logger('diaspora_conversation: verification failed.');
-                       continue;
-               }
-
-               if($msg_parent_author_signature) {
-                       $owner_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($mesg->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid;
-
-                       $parent_author_signature = base64_decode($msg_parent_author_signature);
+               return true;
+       }
 
-                       $key = $msg['key'];
+       private function receive_request_make_friend($importer, $contact) {
 
-                       if(! rsa_verify($owner_signed_data,$parent_author_signature,$key,'sha256')) {
-                               logger('diaspora_conversation: owner verification failed.');
-                               continue;
-                       }
-               }
+               $a = get_app();
 
-               $r = q("select id from mail where `uri` = '%s' limit 1",
-                       dbesc($message_id)
-               );
-               if(count($r)) {
-                       logger('diaspora_conversation: duplicate message already delivered.', LOGGER_DEBUG);
-                       continue;
+               if($contact["rel"] == CONTACT_IS_FOLLOWER && in_array($importer["page-flags"], array(PAGE_FREELOVE))) {
+                       q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d",
+                               intval(CONTACT_IS_FRIEND),
+                               intval($contact["id"]),
+                               intval($importer["uid"])
+                       );
                }
+               // send notification
 
-               q("insert into mail ( `uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`) values ( %d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
-                       intval($importer['uid']),
-                       dbesc($msg_guid),
-                       intval($conversation['id']),
-                       dbesc($person['name']),
-                       dbesc($person['photo']),
-                       dbesc($person['url']),
-                       intval($contact['id']),
-                       dbesc($subject),
-                       dbesc($body),
-                       0,
-                       0,
-                       dbesc($message_id),
-                       dbesc($parent_uri),
-                       dbesc($msg_created_at)
-               );
-
-               q("update conv set updated = '%s' where id = %d",
-                       dbesc(datetime_convert()),
-                       intval($conversation['id'])
+               $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
+                       intval($importer["uid"])
                );
 
-               notification(array(
-                       'type' => NOTIFY_MAIL,
-                       'notify_flags' => $importer['notify-flags'],
-                       'language' => $importer['language'],
-                       'to_name' => $importer['username'],
-                       'to_email' => $importer['email'],
-                       'uid' =>$importer['uid'],
-                       'item' => array('subject' => $subject, 'body' => $body),
-                       'source_name' => $person['name'],
-                       'source_link' => $person['url'],
-                       'source_photo' => $person['thumb'],
-                       'verb' => ACTIVITY_POST,
-                       'otype' => 'mail'
-               ));
-       }
+               if($r && !$r[0]["hide-friends"] && !$contact["hidden"] && intval(get_pconfig($importer["uid"], "system", "post_newfriend"))) {
 
-       return;
-}
+                       $self = q("SELECT * FROM `contact` WHERE `self` AND `uid` = %d LIMIT 1",
+                               intval($importer["uid"])
+                       );
 
-function diaspora_message($importer,$xml,$msg) {
+                       // they are not CONTACT_IS_FOLLOWER anymore but that's what we have in the array
 
-       $a = get_app();
+                       if($self && $contact["rel"] == CONTACT_IS_FOLLOWER) {
 
-       $msg_guid = notags(unxmlify($xml->guid));
-       $msg_parent_guid = notags(unxmlify($xml->parent_guid));
-       $msg_parent_author_signature = notags(unxmlify($xml->parent_author_signature));
-       $msg_author_signature = notags(unxmlify($xml->author_signature));
-       $msg_text = unxmlify($xml->text);
-       $msg_created_at = datetime_convert('UTC','UTC',notags(unxmlify($xml->created_at)));
-       $msg_diaspora_handle = notags(unxmlify($xml->diaspora_handle));
-       $msg_conversation_guid = notags(unxmlify($xml->conversation_guid));
+                               $arr = array();
+                               $arr["uri"] = $arr["parent-uri"] = item_new_uri($a->get_hostname(), $importer["uid"]);
+                               $arr["uid"] = $importer["uid"];
+                               $arr["contact-id"] = $self[0]["id"];
+                               $arr["wall"] = 1;
+                               $arr["type"] = 'wall';
+                               $arr["gravity"] = 0;
+                               $arr["origin"] = 1;
+                               $arr["author-name"] = $arr["owner-name"] = $self[0]["name"];
+                               $arr["author-link"] = $arr["owner-link"] = $self[0]["url"];
+                               $arr["author-avatar"] = $arr["owner-avatar"] = $self[0]["thumb"];
+                               $arr["verb"] = ACTIVITY_FRIEND;
+                               $arr["object-type"] = ACTIVITY_OBJ_PERSON;
+
+                               $A = "[url=".$self[0]["url"]."]".$self[0]["name"]."[/url]";
+                               $B = "[url=".$contact["url"]."]".$contact["name"]."[/url]";
+                               $BPhoto = "[url=".$contact["url"]."][img]".$contact["thumb"]."[/img][/url]";
+                               $arr["body"] = sprintf(t("%1$s is now friends with %2$s"), $A, $B)."\n\n\n".$Bphoto;
+
+                               $arr["object"] = "<object><type>".ACTIVITY_OBJ_PERSON."</type><title>".$contact["name"]."</title>"
+                                       ."<id>".$contact["url"]."/".$contact["name"]."</id>";
+                               $arr["object"] .= "<link>".xmlify('<link rel="alternate" type="text/html" href="'.$contact["url"].'" />'."\n");
+                               $arr["object"] .= xmlify('<link rel="photo" type="image/jpeg" href="'.$contact["thumb"].'" />'."\n");
+                               $arr["object"] .= "</link></object>\n";
+                               $arr["last-child"] = 1;
+
+                               $arr["allow_cid"] = $user[0]["allow_cid"];
+                               $arr["allow_gid"] = $user[0]["allow_gid"];
+                               $arr["deny_cid"]  = $user[0]["deny_cid"];
+                               $arr["deny_gid"]  = $user[0]["deny_gid"];
 
-       $parent_uri = $msg_diaspora_handle . ':' . $msg_parent_guid;
+                               $i = item_store($arr);
+                               if($i)
+                                       proc_run("php", "include/notifier.php", "activity", $i);
 
-       $contact = diaspora_get_contact_by_handle($importer['uid'],$msg_diaspora_handle);
-       if(! $contact) {
-               logger('diaspora_message: cannot find contact: ' . $msg_diaspora_handle);
-               return;
-       }
+                       }
 
-       if(($contact['rel'] == CONTACT_IS_FOLLOWER) || ($contact['blocked']) || ($contact['readonly'])) {
-               logger('diaspora_message: Ignoring this author.');
-               return 202;
+               }
        }
 
-       $conversation = null;
-
-       $c = q("select * from conv where uid = %d and guid = '%s' limit 1",
-               intval($importer['uid']),
-               dbesc($msg_conversation_guid)
-       );
-       if(count($c))
-               $conversation = $c[0];
-       else {
-               logger('diaspora_message: conversation not available.');
-               return;
-       }
+       private function receive_request($importer, $data) {
+               $author = unxmlify($data->author);
+               $recipient = unxmlify($data->recipient);
 
-       $reply = 0;
+               if (!$author || !$recipient)
+                       return;
 
-       $body = diaspora2bb($msg_text);
-       $message_id = $msg_diaspora_handle . ':' . $msg_guid;
+               $contact = self::contact_by_handle($importer["uid"],$author);
 
-       $author_signed_data = $msg_guid . ';' . $msg_parent_guid . ';' . $msg_text . ';' . unxmlify($xml->created_at) . ';' . $msg_diaspora_handle . ';' . $msg_conversation_guid;
+               if($contact) {
 
+                       // perhaps we were already sharing with this person. Now they're sharing with us.
+                       // That makes us friends.
 
-       $author_signature = base64_decode($msg_author_signature);
+                       self::receive_request_make_friend($importer, $contact);
+                       return true;
+               }
 
-       $person = find_diaspora_person_by_handle($msg_diaspora_handle);
-       if(is_array($person) && x($person,'pubkey'))
-               $key = $person['pubkey'];
-       else {
-               logger('diaspora_message: unable to find author details');
-               return;
-       }
+               $ret = self::person_by_handle($author);
 
-       if(! rsa_verify($author_signed_data,$author_signature,$key,'sha256')) {
-               logger('diaspora_message: verification failed.');
-               return;
-       }
+               if (!$ret || ($ret["network"] != NETWORK_DIASPORA)) {
+                       logger("Cannot resolve diaspora handle ".$author." for ".$recipient);
+                       return false;
+               }
 
-       $r = q("select id from mail where `uri` = '%s' and uid = %d limit 1",
-               dbesc($message_id),
-               intval($importer['uid'])
-       );
-       if(count($r)) {
-               logger('diaspora_message: duplicate message already delivered.', LOGGER_DEBUG);
-               return;
-       }
+               $batch = (($ret["batch"]) ? $ret["batch"] : implode("/", array_slice(explode("/", $ret["url"]), 0, 3))."/receive/public");
+
+               $r = q("INSERT INTO `contact` (`uid`, `network`,`addr`,`created`,`url`,`nurl`,`batch`,`name`,`nick`,`photo`,`pubkey`,`notify`,`poll`,`blocked`,`priority`)
+                       VALUES (%d, '%s', '%s', '%s', '%s','%s','%s','%s','%s','%s','%s','%s','%s',%d,%d)",
+                       intval($importer["uid"]),
+                       dbesc($ret["network"]),
+                       dbesc($ret["addr"]),
+                       datetime_convert(),
+                       dbesc($ret["url"]),
+                       dbesc(normalise_link($ret["url"])),
+                       dbesc($batch),
+                       dbesc($ret["name"]),
+                       dbesc($ret["nick"]),
+                       dbesc($ret["photo"]),
+                       dbesc($ret["pubkey"]),
+                       dbesc($ret["notify"]),
+                       dbesc($ret["poll"]),
+                       1,
+                       2
+               );
 
-       q("insert into mail ( `uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`) values ( %d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
-               intval($importer['uid']),
-               dbesc($msg_guid),
-               intval($conversation['id']),
-               dbesc($person['name']),
-               dbesc($person['photo']),
-               dbesc($person['url']),
-               intval($contact['id']),
-               dbesc($conversation['subject']),
-               dbesc($body),
-               0,
-               1,
-               dbesc($message_id),
-               dbesc($parent_uri),
-               dbesc($msg_created_at)
-       );
-
-       q("update conv set updated = '%s' where id = %d",
-               dbesc(datetime_convert()),
-               intval($conversation['id'])
-       );
-
-       return;
-}
+               // find the contact record we just created
 
-function diaspora_participation($importer,$xml) {
-       logger("Unsupported message type 'participation' ".print_r($xml, true));
-}
+               $contact_record = self::contact_by_handle($importer["uid"],$author);
 
-function diaspora_photo($importer,$xml,$msg,$attempt=1) {
+               if (!$contact_record) {
+                       logger("unable to locate newly created contact record.");
+                       return;
+               }
 
-       $a = get_app();
+               $g = q("SELECT `def_gid` FROM `user` WHERE `uid` = %d LIMIT 1",
+                       intval($importer["uid"])
+               );
 
-       logger('diaspora_photo: init',LOGGER_DEBUG);
+               if($g && intval($g[0]["def_gid"]))
+                       group_add_member($importer["uid"], "", $contact_record["id"], $g[0]["def_gid"]);
 
-       $remote_photo_path = notags(unxmlify($xml->remote_photo_path));
+               if($importer["page-flags"] == PAGE_NORMAL) {
 
-       $remote_photo_name = notags(unxmlify($xml->remote_photo_name));
+                       $hash = random_string().(string)time();   // Generate a confirm_key
 
-       $status_message_guid = notags(unxmlify($xml->status_message_guid));
+                       $ret = q("INSERT INTO `intro` (`uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
+                               VALUES (%d, %d, %d, %d, '%s', '%s', '%s')",
+                               intval($importer["uid"]),
+                               intval($contact_record["id"]),
+                               0,
+                               0,
+                               dbesc(t("Sharing notification from Diaspora network")),
+                               dbesc($hash),
+                               dbesc(datetime_convert())
+                       );
+               } else {
 
-       $guid = notags(unxmlify($xml->guid));
+                       // automatic friend approval
 
-       $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
+                       update_contact_avatar($contact_record["photo"],$importer["uid"],$contact_record["id"]);
 
-       $public = notags(unxmlify($xml->public));
+                       // technically they are sharing with us (CONTACT_IS_SHARING),
+                       // but if our page-type is PAGE_COMMUNITY or PAGE_SOAPBOX
+                       // we are going to change the relationship and make them a follower.
 
-       $created_at = notags(unxmlify($xml_created_at));
+                       if($importer["page-flags"] == PAGE_FREELOVE)
+                               $new_relation = CONTACT_IS_FRIEND;
+                       else
+                               $new_relation = CONTACT_IS_FOLLOWER;
 
-       logger('diaspora_photo: status_message_guid: ' . $status_message_guid, LOGGER_DEBUG);
+                       $r = q("UPDATE `contact` SET `rel` = %d,
+                               `name-date` = '%s',
+                               `uri-date` = '%s',
+                               `blocked` = 0,
+                               `pending` = 0,
+                               `writable` = 1
+                               WHERE `id` = %d
+                               ",
+                               intval($new_relation),
+                               dbesc(datetime_convert()),
+                               dbesc(datetime_convert()),
+                               intval($contact_record["id"])
+                       );
 
-       $contact = diaspora_get_contact_by_handle($importer['uid'],$msg['author']);
-       if(! $contact) {
-               logger('diaspora_photo: contact record not found: ' . $msg['author'] . ' handle: ' . $diaspora_handle);
-               return;
-       }
+                       $u = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", intval($importer["uid"]));
+                       if($u)
+                               $ret = self::send_share($u[0], $contact_record);
+               }
 
-       if(! diaspora_post_allow($importer,$contact, false)) {
-               logger('diaspora_photo: Ignoring this author.');
-               return 202;
+               return true;
        }
 
-       $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-               intval($importer['uid']),
-               dbesc($status_message_guid)
-       );
-
-/*     deactivated by now since it can lead to multiplicated pictures in posts.
-       if(!count($r)) {
-               $result = diaspora_store_by_guid($status_message_guid, $contact['url'], $importer['uid']);
+       private function original_item($guid, $orig_author, $author) {
 
-               if (!$result) {
-                       $person = find_diaspora_person_by_handle($diaspora_handle);
-                       $result = diaspora_store_by_guid($status_message_guid, $person['url'], $importer['uid']);
-               }
+               // Do we already have this item?
+               $r = q("SELECT `body`, `tag`, `app`, `created`, `object-type`, `uri`, `guid`,
+                               `author-name`, `author-link`, `author-avatar`
+                               FROM `item` WHERE `guid` = '%s' AND `visible` AND NOT `deleted` AND `body` != '' LIMIT 1",
+                       dbesc($guid));
 
-               if ($result) {
-                       logger("Fetched missing item ".$status_message_guid." - result: ".$result, LOGGER_DEBUG);
+               if($r) {
+                       logger("reshared message ".$guid." already exists on system.");
 
-                       $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-                               intval($importer['uid']),
-                               dbesc($status_message_guid)
-                       );
-               }
-       }
-*/
-       if(!count($r)) {
-               if($attempt <= 3) {
-                       q("INSERT INTO dsprphotoq (uid, msg, attempt) VALUES (%d, '%s', %d)",
-                          intval($importer['uid']),
-                          dbesc(serialize($msg)),
-                          intval($attempt + 1)
-                       );
+                       // Maybe it is already a reshared item?
+                       // Then refetch the content, since there can be many side effects with reshared posts from other networks or reshares from reshares
+                       if (self::is_reshare($r[0]["body"]))
+                               $r = array();
+                       else
+                               return $r[0];
                }
 
-               logger('diaspora_photo: attempt = ' . $attempt . '; status message not found: ' . $status_message_guid . ' for photo: ' . $guid);
-               return;
-       }
-
-       $parent_item = $r[0];
+               if (!$r) {
+                       $server = "https://".substr($orig_author, strpos($orig_author, "@") + 1);
+                       logger("1st try: reshared message ".$guid." will be fetched from original server: ".$server);
+                       $item_id = self::store_by_guid($guid, $server);
 
-       $link_text = '[img]' . $remote_photo_path . $remote_photo_name . '[/img]' . "\n";
-
-       $link_text = scale_external_images($link_text, true,
-                                          array($remote_photo_name, 'scaled_full_' . $remote_photo_name));
+                       if (!$item_id) {
+                               $server = "http://".substr($orig_author, strpos($orig_author, "@") + 1);
+                               logger("2nd try: reshared message ".$guid." will be fetched from original server: ".$server);
+                               $item_id = self::store_by_guid($guid, $server);
+                       }
 
-       if(strpos($parent_item['body'],$link_text) === false) {
+                       // Deactivated by now since there is a risk that someone could manipulate postings through this method
+/*                     if (!$item_id) {
+                               $server = "https://".substr($author, strpos($author, "@") + 1);
+                               logger("3rd try: reshared message ".$guid." will be fetched from sharer's server: ".$server);
+                               $item_id = self::store_by_guid($guid, $server);
+                       }
+                       if (!$item_id) {
+                               $server = "http://".substr($author, strpos($author, "@") + 1);
+                               logger("4th try: reshared message ".$guid." will be fetched from sharer's server: ".$server);
+                               $item_id = self::store_by_guid($guid, $server);
+                       }
+*/
+                       if ($item_id) {
+                               $r = q("SELECT `body`, `tag`, `app`, `created`, `object-type`, `uri`, `guid`,
+                                               `author-name`, `author-link`, `author-avatar`
+                                       FROM `item` WHERE `id` = %d AND `visible` AND NOT `deleted` AND `body` != '' LIMIT 1",
+                                       intval($item_id));
 
-               $parent_item['body'] = $link_text . $parent_item['body'];
+                               if ($r)
+                                       return $r[0];
 
-               $r = q("UPDATE `item` SET `body` = '%s', `visible` = 1 WHERE `id` = %d AND `uid` = %d",
-                       dbesc($parent_item['body']),
-                       intval($parent_item['id']),
-                       intval($parent_item['uid'])
-               );
-               put_item_in_cache($parent_item, true);
-               update_thread($parent_item['id']);
+                       }
+               }
+               return false;
        }
 
-       return;
-}
+       private function receive_reshare($importer, $data) {
+               $root_author = notags(unxmlify($data->root_author));
+               $root_guid = notags(unxmlify($data->root_guid));
+               $guid = notags(unxmlify($data->guid));
+               $author = notags(unxmlify($data->author));
+               $public = notags(unxmlify($data->public));
+               $created_at = notags(unxmlify($data->created_at));
 
+               $contact = self::allowed_contact_by_handle($importer, $author, false);
+               if (!$contact)
+                       return false;
 
+               if (self::message_exists($importer["uid"], $guid))
+                       return false;
 
+               $original_item = self::original_item($root_guid, $root_author, $author);
+               if (!$original_item)
+                       return false;
 
-function diaspora_like($importer,$xml,$msg) {
+               $orig_url = App::get_baseurl()."/display/".$original_item["guid"];
 
-       $a = get_app();
-       $guid = notags(unxmlify($xml->guid));
-       $parent_guid = notags(unxmlify($xml->parent_guid));
-       $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
-       $target_type = notags(unxmlify($xml->target_type));
-       $positive = notags(unxmlify($xml->positive));
-       $author_signature = notags(unxmlify($xml->author_signature));
+               $datarray = array();
 
-       $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : '');
+               $datarray["uid"] = $importer["uid"];
+               $datarray["contact-id"] = $contact["id"];
+               $datarray["network"]  = NETWORK_DIASPORA;
 
-       // likes on comments not supported here and likes on photos not supported by Diaspora
+               $datarray["author-name"] = $contact["name"];
+               $datarray["author-link"] = $contact["url"];
+               $datarray["author-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
 
-//     if($target_type !== 'Post')
-//             return;
+               $datarray["owner-name"] = $datarray["author-name"];
+               $datarray["owner-link"] = $datarray["author-link"];
+               $datarray["owner-avatar"] = $datarray["author-avatar"];
 
-       $contact = diaspora_get_contact_by_handle($importer['uid'],$msg['author']);
-       if(! $contact) {
-               logger('diaspora_like: cannot find contact: ' . $msg['author']);
-               return;
-       }
+               $datarray["guid"] = $guid;
+               $datarray["uri"] = $datarray["parent-uri"] = $author.":".$guid;
 
-       if(! diaspora_post_allow($importer,$contact, false)) {
-               logger('diaspora_like: Ignoring this author.');
-               return 202;
-       }
+               $datarray["verb"] = ACTIVITY_POST;
+               $datarray["gravity"] = GRAVITY_PARENT;
 
-       $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-               intval($importer['uid']),
-               dbesc($parent_guid)
-       );
+               $datarray["object"] = json_encode($data);
 
-       if(!count($r)) {
-               $result = diaspora_store_by_guid($parent_guid, $contact['url'], $importer['uid']);
+               $prefix = share_header($original_item["author-name"], $original_item["author-link"], $original_item["author-avatar"],
+                                       $original_item["guid"], $original_item["created"], $orig_url);
+               $datarray["body"] = $prefix.$original_item["body"]."[/share]";
 
-               if (!$result) {
-                       $person = find_diaspora_person_by_handle($diaspora_handle);
-                       $result = diaspora_store_by_guid($parent_guid, $person['url'], $importer['uid']);
-               }
+               $datarray["tag"] = $original_item["tag"];
+               $datarray["app"]  = $original_item["app"];
 
-               if ($result) {
-                       logger("Fetched missing item ".$parent_guid." - result: ".$result, LOGGER_DEBUG);
+               $datarray["plink"] = self::plink($author, $guid);
+               $datarray["private"] = (($public == "false") ? 1 : 0);
+               $datarray["changed"] = $datarray["created"] = $datarray["edited"] = datetime_convert("UTC", "UTC", $created_at);
 
-                       $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-                               intval($importer['uid']),
-                               dbesc($parent_guid)
-                       );
-               }
-       }
+               $datarray["object-type"] = $original_item["object-type"];
 
-       if(! count($r)) {
-               logger('diaspora_like: parent item not found: ' . $guid);
-               return;
-       }
+               self::fetch_guid($datarray);
+               $message_id = item_store($datarray);
 
-       $parent_item = $r[0];
+               if ($message_id)
+                       logger("Stored reshare ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
 
-       $r = q("SELECT * FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-               intval($importer['uid']),
-               dbesc($guid)
-       );
-       if(count($r)) {
-               if($positive === 'true') {
-                       logger('diaspora_like: duplicate like: ' . $guid);
-                       return;
-               }
-               // Note: I don't think "Like" objects with positive = "false" are ever actually used
-               // It looks like "RelayableRetractions" are used for "unlike" instead
-               if($positive === 'false') {
-                       logger('diaspora_like: received a like with positive set to "false"...ignoring');
-/*                     q("UPDATE `item` SET `deleted` = 1 WHERE `id` = %d AND `uid` = %d",
-                               intval($r[0]['id']),
-                               intval($importer['uid'])
-                       );*/
-                       // FIXME--actually don't unless it turns out that Diaspora does indeed send out "false" likes
-                       //  send notification via proc_run()
-                       return;
-               }
+               return $message_id;
        }
-       // Note: I don't think "Like" objects with positive = "false" are ever actually used
-       // It looks like "RelayableRetractions" are used for "unlike" instead
-       if($positive === 'false') {
-               logger('diaspora_like: received a like with positive set to "false"');
-               logger('diaspora_like: unlike received with no corresponding like...ignoring');
-               return;
-       }
-
 
-       /* How Diaspora performs "like" signature checking:
+       private function item_retraction($importer, $contact, $data) {
+               $target_type = notags(unxmlify($data->target_type));
+               $target_guid = notags(unxmlify($data->target_guid));
+               $author = notags(unxmlify($data->author));
 
-          - If an item has been sent by the like author to the top-level post owner to relay on
-            to the rest of the contacts on the top-level post, the top-level post owner should check
-            the author_signature, then create a parent_author_signature before relaying the like on
-          - If an item has been relayed on by the top-level post owner, the contacts who receive it
-            check only the parent_author_signature. Basically, they trust that the top-level post
-            owner has already verified the authenticity of anything he/she sends out
-          - In either case, the signature that get checked is the signature created by the person
-            who sent the salmon
-       */
-
-       // Diaspora has changed the way they are signing the likes.
-       // Just to make sure that we don't miss any likes we will check the old and the current way.
-       $old_signed_data = $guid . ';' . $target_type . ';' . $parent_guid . ';' . $positive . ';' . $diaspora_handle;
+               $person = self::person_by_handle($author);
+               if (!is_array($person)) {
+                       logger("unable to find author detail for ".$author);
+                       return false;
+               }
 
-       $signed_data = $positive . ';' . $guid . ';' . $target_type . ';' . $parent_guid . ';' . $diaspora_handle;
+               $r = q("SELECT `id`, `parent`, `parent-uri`, `author-link` FROM `item` WHERE `guid` = '%s' AND `uid` = %d AND NOT `file` LIKE '%%[%%' LIMIT 1",
+                       dbesc($target_guid),
+                       intval($importer["uid"])
+               );
+               if (!$r)
+                       return false;
 
-       $key = $msg['key'];
+               // Only delete it if the author really fits
+               if (!link_compare($r[0]["author-link"], $person["url"])) {
+                       logger("Item author ".$r[0]["author-link"]." doesn't fit to expected contact ".$person["url"], LOGGER_DEBUG);
+                       return false;
+               }
 
-       if ($parent_author_signature) {
-               // If a parent_author_signature exists, then we've received the like
-               // relayed from the top-level post owner. There's no need to check the
-               // author_signature if the parent_author_signature is valid
+               // Check if the sender is the thread owner
+               $p = q("SELECT `id`, `author-link`, `origin` FROM `item` WHERE `id` = %d",
+                       intval($r[0]["parent"]));
 
-               $parent_author_signature = base64_decode($parent_author_signature);
+               // Only delete it if the parent author really fits
+               if (!link_compare($p[0]["author-link"], $contact["url"]) AND !link_compare($r[0]["author-link"], $contact["url"])) {
+                       logger("Thread author ".$p[0]["author-link"]." and item author ".$r[0]["author-link"]." don't fit to expected contact ".$contact["url"], LOGGER_DEBUG);
+                       return false;
+               }
 
-               if (!rsa_verify($signed_data,$parent_author_signature,$key,'sha256') AND
-                       !rsa_verify($old_signed_data,$parent_author_signature,$key,'sha256')) {
+               // Currently we don't have a central deletion function that we could use in this case. The function "item_drop" doesn't work for that case
+               q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s', `body` = '' , `title` = '' WHERE `id` = %d",
+                       dbesc(datetime_convert()),
+                       dbesc(datetime_convert()),
+                       intval($r[0]["id"])
+               );
+               delete_thread($r[0]["id"], $r[0]["parent-uri"]);
 
-                       logger('diaspora_like: top-level owner verification failed.');
-                       return;
-               }
-       } else {
-               // If there's no parent_author_signature, then we've received the like
-               // from the like creator. In that case, the person is "like"ing
-               // our post, so he/she must be a contact of ours and his/her public key
-               // should be in $msg['key']
+               logger("Deleted target ".$target_guid." (".$r[0]["id"].") from user ".$importer["uid"]." parent: ".$p[0]["id"], LOGGER_DEBUG);
 
-               $author_signature = base64_decode($author_signature);
+               // Now check if the retraction needs to be relayed by us
+               if($p[0]["origin"]) {
 
-               if (!rsa_verify($signed_data,$author_signature,$key,'sha256') AND
-                       !rsa_verify($old_signed_data,$author_signature,$key,'sha256')) {
+                       // Formerly we stored the signed text, the signature and the author in different fields.
+                       // We now store the raw data so that we are more flexible.
+                       q("INSERT INTO `sign` (`retract_iid`,`signed_text`) VALUES (%d,'%s')",
+                               intval($r[0]["id"]),
+                               dbesc(json_encode($data))
+                       );
+                       $s = q("select * from sign where retract_iid = %d", intval($r[0]["id"]));
+                       logger("Stored signatur for item ".$r[0]["id"]." - ".print_r($s, true), LOGGER_DEBUG);
 
-                       logger('diaspora_like: like creator verification failed.');
-                       return;
+                       // notify others
+                       proc_run("php", "include/notifier.php", "drop", $r[0]["id"]);
                }
        }
 
-       // Phew! Everything checks out. Now create an item.
+       private function receive_retraction($importer, $sender, $data) {
+               $target_type = notags(unxmlify($data->target_type));
 
-       // Find the original comment author information.
-       // We need this to make sure we display the comment author
-       // information (name and avatar) correctly.
-       if(strcasecmp($diaspora_handle,$msg['author']) == 0)
-               $person = $contact;
-       else {
-               $person = find_diaspora_person_by_handle($diaspora_handle);
+               $contact = self::contact_by_handle($importer["uid"], $sender);
+               if (!$contact) {
+                       logger("cannot find contact for sender: ".$sender." and user ".$importer["uid"]);
+                       return false;
+               }
 
-               if(! is_array($person)) {
-                       logger('diaspora_like: unable to find author details');
-                       return;
+               logger("Got retraction for ".$target_type.", sender ".$sender." and user ".$importer["uid"], LOGGER_DEBUG);
+
+               switch ($target_type) {
+                       case "Comment":
+                       case "Like":
+                       case "Post": // "Post" will be supported in a future version
+                       case "Reshare":
+                       case "StatusMessage":
+                               return self::item_retraction($importer, $contact, $data);;
+
+                       case "Person":
+                               /// @todo What should we do with an "unshare"?
+                               // Removing the contact isn't correct since we still can read the public items
+                               //contact_remove($contact["id"]);
+                               return true;
+
+                       default:
+                               logger("Unknown target type ".$target_type);
+                               return false;
                }
+               return true;
        }
 
-       $uri = $diaspora_handle . ':' . $guid;
-
-       $activity = ACTIVITY_LIKE;
-       $post_type = (($parent_item['resource-id']) ? t('photo') : t('status'));
-       $objtype = (($parent_item['resource-id']) ? ACTIVITY_OBJ_PHOTO : ACTIVITY_OBJ_NOTE );
-       $link = xmlify('<link rel="alternate" type="text/html" href="' . $a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $parent_item['id'] . '" />' . "\n") ;
-       $body = $parent_item['body'];
-
-       $obj = <<< EOT
-
-       <object>
-               <type>$objtype</type>
-               <local>1</local>
-               <id>{$parent_item['uri']}</id>
-               <link>$link</link>
-               <title></title>
-               <content>$body</content>
-       </object>
-EOT;
-       $bodyverb = t('%1$s likes %2$s\'s %3$s');
-
-       // Fetch the contact id - if we know this contact
-       $r = q("SELECT `id`, `network` FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d LIMIT 1",
-               dbesc(normalise_link($person['url'])), intval($importer['uid']));
-       if ($r) {
-               $cid = $r[0]['id'];
-               $network = $r[0]['network'];
-       } else {
-               $cid = $contact['id'];
-               $network = NETWORK_DIASPORA;
-       }
+       private function receive_status_message($importer, $data) {
 
-       $arr = array();
-
-       $arr['uri'] = $uri;
-       $arr['uid'] = $importer['uid'];
-       $arr['guid'] = $guid;
-       $arr['network']  = $network;
-       $arr['contact-id'] = $cid;
-       $arr['type'] = 'activity';
-       $arr['wall'] = $parent_item['wall'];
-       $arr['gravity'] = GRAVITY_LIKE;
-       $arr['parent'] = $parent_item['id'];
-       $arr['parent-uri'] = $parent_item['uri'];
-
-       $arr['owner-name'] = $parent_item['name'];
-       $arr['owner-link'] = $parent_item['url'];
-       //$arr['owner-avatar'] = $parent_item['thumb'];
-       $arr['owner-avatar'] = ((x($parent_item,'thumb')) ? $parent_item['thumb'] : $parent_item['photo']);
-
-       $arr['author-name'] = $person['name'];
-       $arr['author-link'] = $person['url'];
-       $arr['author-avatar'] = ((x($person,'thumb')) ? $person['thumb'] : $person['photo']);
-
-       $ulink = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
-       $alink = '[url=' . $parent_item['author-link'] . ']' . $parent_item['author-name'] . '[/url]';
-       //$plink = '[url=' . $a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $parent_item['id'] . ']' . $post_type . '[/url]';
-       $plink = '[url='.$a->get_baseurl().'/display/'.urlencode($guid).']'.$post_type.'[/url]';
-       $arr['body'] =  sprintf( $bodyverb, $ulink, $alink, $plink );
-
-       $arr['app']  = 'Diaspora';
-
-       $arr['private'] = $parent_item['private'];
-       $arr['verb'] = $activity;
-       $arr['object-type'] = $objtype;
-       $arr['object'] = $obj;
-       $arr['visible'] = 1;
-       $arr['unseen'] = 1;
-       $arr['last-child'] = 0;
-
-       $message_id = item_store($arr);
-
-
-       //if($message_id) {
-       //      q("update item set plink = '%s' where id = %d",
-       //              //dbesc($a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $message_id),
-       //              dbesc($a->get_baseurl().'/display/'.$guid),
-       //              intval($message_id)
-       //      );
-       //}
-
-       // If we are the origin of the parent we store the original signature and notify our followers
-       if($parent_item['origin']) {
-               $author_signature_base64 = base64_encode($author_signature);
-               $author_signature_base64 = diaspora_repair_signature($author_signature_base64, $diaspora_handle);
-
-               q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
-                       intval($message_id),
-                       dbesc($signed_data),
-                       dbesc($author_signature_base64),
-                       dbesc($diaspora_handle)
-               );
+               $raw_message = unxmlify($data->raw_message);
+               $guid = notags(unxmlify($data->guid));
+               $author = notags(unxmlify($data->author));
+               $public = notags(unxmlify($data->public));
+               $created_at = notags(unxmlify($data->created_at));
+               $provider_display_name = notags(unxmlify($data->provider_display_name));
 
-               // notify others
-               proc_run('php','include/notifier.php','comment-import',$message_id);
-       }
+               /// @todo enable support for polls
+               //if ($data->poll) {
+               //      foreach ($data->poll AS $poll)
+               //              print_r($poll);
+               //      die("poll!\n");
+               //}
+               $contact = self::allowed_contact_by_handle($importer, $author, false);
+               if (!$contact)
+                       return false;
 
-       return;
-}
+               if (self::message_exists($importer["uid"], $guid))
+                       return false;
 
-function diaspora_retraction($importer,$xml) {
+               $address = array();
+               if ($data->location)
+                       foreach ($data->location->children() AS $fieldname => $data)
+                               $address[$fieldname] = notags(unxmlify($data));
 
+               $body = diaspora2bb($raw_message);
 
-       $guid = notags(unxmlify($xml->guid));
-       $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
-       $type = notags(unxmlify($xml->type));
+               $datarray = array();
 
-       $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
-       if(! $contact)
-               return;
+               if ($data->photo) {
+                       foreach ($data->photo AS $photo)
+                               $body = "[img]".$photo->remote_photo_path.$photo->remote_photo_name."[/img]\n".$body;
 
-       if($type === 'Person') {
-               require_once('include/Contact.php');
-               contact_remove($contact['id']);
-       } elseif($type === 'StatusMessage') {
-               $guid = notags(unxmlify($xml->post_guid));
+                       $datarray["object-type"] = ACTIVITY_OBJ_PHOTO;
+               } else {
+                       $datarray["object-type"] = ACTIVITY_OBJ_NOTE;
 
-               $r = q("SELECT * FROM `item` WHERE `guid` = '%s' AND `uid` = %d AND NOT `file` LIKE '%%[%%' LIMIT 1",
-                       dbesc($guid),
-                       intval($importer['uid'])
-               );
-               if(count($r)) {
-                       if(link_compare($r[0]['author-link'],$contact['url'])) {
-                               q("UPDATE `item` SET `deleted` = 1, `changed` = '%s' WHERE `id` = %d",
-                                       dbesc(datetime_convert()),
-                                       intval($r[0]['id'])
-                               );
-                               delete_thread($r[0]['id'], $r[0]['parent-uri']);
-                       }
-               }
-       } elseif($type === 'Post') {
-               $r = q("select * from item where guid = '%s' and uid = %d and not file like '%%[%%' limit 1",
-                       dbesc('guid'),
-                       intval($importer['uid'])
-               );
-               if(count($r)) {
-                       if(link_compare($r[0]['author-link'],$contact['url'])) {
-                               q("update item set `deleted` = 1, `changed` = '%s' where `id` = %d",
-                                       dbesc(datetime_convert()),
-                                       intval($r[0]['id'])
-                               );
-                               delete_thread($r[0]['id'], $r[0]['parent-uri']);
-                       }
+                       // Add OEmbed and other information to the body
+                       if (!self::is_redmatrix($contact["url"]))
+                               $body = add_page_info_to_body($body, false, true);
                }
-       }
 
-       return 202;
-       // NOTREACHED
-}
+               $datarray["uid"] = $importer["uid"];
+               $datarray["contact-id"] = $contact["id"];
+               $datarray["network"] = NETWORK_DIASPORA;
 
-function diaspora_signed_retraction($importer,$xml,$msg) {
+               $datarray["author-name"] = $contact["name"];
+               $datarray["author-link"] = $contact["url"];
+               $datarray["author-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
 
+               $datarray["owner-name"] = $datarray["author-name"];
+               $datarray["owner-link"] = $datarray["author-link"];
+               $datarray["owner-avatar"] = $datarray["author-avatar"];
 
-       $guid = notags(unxmlify($xml->target_guid));
-       $diaspora_handle = notags(unxmlify($xml->sender_handle));
-       $type = notags(unxmlify($xml->target_type));
-       $sig = notags(unxmlify($xml->target_author_signature));
+               $datarray["guid"] = $guid;
+               $datarray["uri"] = $datarray["parent-uri"] = $author.":".$guid;
 
-       $parent_author_signature = (($xml->parent_author_signature) ? notags(unxmlify($xml->parent_author_signature)) : '');
+               $datarray["verb"] = ACTIVITY_POST;
+               $datarray["gravity"] = GRAVITY_PARENT;
 
-       $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
-       if(! $contact) {
-               logger('diaspora_signed_retraction: no contact ' . $diaspora_handle . ' for ' . $importer['uid']);
-               return;
-       }
+               $datarray["object"] = json_encode($data);
 
+               $datarray["body"] = $body;
 
-       $signed_data = $guid . ';' . $type ;
-       $key = $msg['key'];
+               if ($provider_display_name != "")
+                       $datarray["app"] = $provider_display_name;
 
-       /* How Diaspora performs relayable_retraction signature checking:
+               $datarray["plink"] = self::plink($author, $guid);
+               $datarray["private"] = (($public == "false") ? 1 : 0);
+               $datarray["changed"] = $datarray["created"] = $datarray["edited"] = datetime_convert("UTC", "UTC", $created_at);
 
-          - If an item has been sent by the item author to the top-level post owner to relay on
-            to the rest of the contacts on the top-level post, the top-level post owner checks
-            the author_signature, then creates a parent_author_signature before relaying the item on
-          - If an item has been relayed on by the top-level post owner, the contacts who receive it
-            check only the parent_author_signature. Basically, they trust that the top-level post
-            owner has already verified the authenticity of anything he/she sends out
-          - In either case, the signature that get checked is the signature created by the person
-            who sent the salmon
-       */
+               if (isset($address["address"]))
+                       $datarray["location"] = $address["address"];
 
-       if($parent_author_signature) {
+               if (isset($address["lat"]) AND isset($address["lng"]))
+                       $datarray["coord"] = $address["lat"]." ".$address["lng"];
 
-               $parent_author_signature = base64_decode($parent_author_signature);
+               self::fetch_guid($datarray);
+               $message_id = item_store($datarray);
 
-               if(! rsa_verify($signed_data,$parent_author_signature,$key,'sha256')) {
-                       logger('diaspora_signed_retraction: top-level post owner verification failed');
-                       return;
-               }
+               if ($message_id)
+                       logger("Stored item ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
 
-       } else {
+               return $message_id;
+       }
 
-               $sig_decode = base64_decode($sig);
+       /******************************************************************************************
+        * Here are all the functions that are needed to transmit data with the Diaspora protocol *
+        ******************************************************************************************/
 
-               if(! rsa_verify($signed_data,$sig_decode,$key,'sha256')) {
-                       logger('diaspora_signed_retraction: retraction owner verification failed.' . print_r($msg,true));
-                       return;
-               }
-       }
+       private function my_handle($me) {
+               if ($contact["addr"] != "")
+                       return $contact["addr"];
 
-       if($type === 'StatusMessage' || $type === 'Comment' || $type === 'Like') {
-               $r = q("select * from item where guid = '%s' and uid = %d and not file like '%%[%%' limit 1",
-                       dbesc($guid),
-                       intval($importer['uid'])
-               );
-               if(count($r)) {
-                       if(link_compare($r[0]['author-link'],$contact['url'])) {
-                               q("update item set `deleted` = 1, `edited` = '%s', `changed` = '%s', `body` = '' , `title` = '' where `id` = %d",
-                                       dbesc(datetime_convert()),
-                                       dbesc(datetime_convert()),
-                                       intval($r[0]['id'])
-                               );
-                               delete_thread($r[0]['id'], $r[0]['parent-uri']);
-
-                               // Now check if the retraction needs to be relayed by us
-                               //
-                               // The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always
-                               // return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent.
-                               // The only item with `parent` and `id` as the parent id is the parent item.
-                               $p = q("SELECT `origin` FROM `item` WHERE `parent` = %d AND `id` = %d LIMIT 1",
-                                       intval($r[0]['parent']),
-                                       intval($r[0]['parent'])
-                               );
-                               if(count($p)) {
-                                       if($p[0]['origin']) {
-                                               q("insert into sign (`retract_iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
-                                                       $r[0]['id'],
-                                                       dbesc($signed_data),
-                                                       dbesc($sig),
-                                                       dbesc($diaspora_handle)
-                                               );
-
-                                               // the existence of parent_author_signature would have meant the parent_author or owner
-                                               // is already relaying.
-                                               logger('diaspora_signed_retraction: relaying relayable_retraction');
-
-                                               proc_run('php','include/notifier.php','drop',$r[0]['id']);
-                                       }
-                               }
-                       }
-               }
+               // Normally we should have a filled "addr" field - but in the past this wasn't the case
+               // So - just in case - we build the the address here.
+               return $me["nickname"]."@".substr(App::get_baseurl(), strpos(App::get_baseurl(),"://") + 3);
        }
-       else
-               logger('diaspora_signed_retraction: unknown type: ' . $type);
 
-       return 202;
-       // NOTREACHED
-}
+       private function build_public_message($msg, $user, $contact, $prvkey, $pubkey) {
 
-function diaspora_profile($importer,$xml,$msg) {
+               logger("Message: ".$msg, LOGGER_DATA);
 
-       $a = get_app();
-       $diaspora_handle = notags(unxmlify($xml->diaspora_handle));
+               $handle = self::my_handle($user);
 
+               $b64url_data = base64url_encode($msg);
 
-       if($diaspora_handle != $msg['author']) {
-               logger('diaspora_post: Potential forgery. Message handle is not the same as envelope sender.');
-               return 202;
-       }
+               $data = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data);
 
-       $contact = diaspora_get_contact_by_handle($importer['uid'],$diaspora_handle);
-       if(! $contact)
-               return;
-
-       //if($contact['blocked']) {
-       //      logger('diaspora_post: Ignoring this author.');
-       //      return 202;
-       //}
-
-       $name = unxmlify($xml->first_name) . ((strlen($xml->last_name)) ? ' ' . unxmlify($xml->last_name) : '');
-       $image_url = unxmlify($xml->image_url);
-       $birthday = unxmlify($xml->birthday);
-       $location = diaspora2bb(unxmlify($xml->location));
-       $about = diaspora2bb(unxmlify($xml->bio));
-       $gender = unxmlify($xml->gender);
-       $searchable = (unxmlify($xml->searchable) == "true");
-       $nsfw = (unxmlify($xml->nsfw) == "true");
-       $tags = unxmlify($xml->tag_string);
-
-       $tags = explode("#", $tags);
-
-       $keywords = array();
-       foreach ($tags as $tag) {
-               $tag = trim(strtolower($tag));
-               if ($tag != "")
-                       $keywords[] = $tag;
-       }
+               $type = "application/xml";
+               $encoding = "base64url";
+               $alg = "RSA-SHA256";
 
-       $keywords = implode(", ", $keywords);
+               $signable_data = $data.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg);
 
-       $handle_parts = explode("@", $diaspora_handle);
-       $nick = $handle_parts[0];
+               $signature = rsa_sign($signable_data,$prvkey);
+               $sig = base64url_encode($signature);
 
-       if($name === '') {
-               $name = $handle_parts[0];
-       }
+               $xmldata = array("diaspora" => array("header" => array("author_id" => $handle),
+                                               "me:env" => array("me:encoding" => "base64url",
+                                                               "me:alg" => "RSA-SHA256",
+                                                               "me:data" => $data,
+                                                               "@attributes" => array("type" => "application/xml"),
+                                                               "me:sig" => $sig)));
 
-       if( preg_match("|^https?://|", $image_url) === 0) {
-               $image_url = "http://" . $handle_parts[1] . $image_url;
+               $namespaces = array("" => "https://joindiaspora.com/protocol",
+                               "me" => "http://salmon-protocol.org/ns/magic-env");
+
+               $magic_env = xml::from_array($xmldata, $xml, false, $namespaces);
+
+               logger("magic_env: ".$magic_env, LOGGER_DATA);
+               return $magic_env;
        }
 
-/*     $r = q("SELECT DISTINCT ( `resource-id` ) FROM `photo` WHERE  `uid` = %d AND `contact-id` = %d AND `album` = 'Contact Photos' ",
-               intval($importer['uid']),
-               intval($contact['id'])
-       );
-       $oldphotos = ((count($r)) ? $r : null);*/
+       private function build_private_message($msg, $user, $contact, $prvkey, $pubkey) {
 
-       require_once('include/Photo.php');
+               logger("Message: ".$msg, LOGGER_DATA);
 
-       update_contact_avatar($image_url,$importer['uid'],$contact['id']);
+               // without a public key nothing will work
 
-       // Generic birthday. We don't know the timezone. The year is irrelevant.
+               if (!$pubkey) {
+                       logger("pubkey missing: contact id: ".$contact["id"]);
+                       return false;
+               }
 
-       $birthday = str_replace('1000','1901',$birthday);
+               $inner_aes_key = random_string(32);
+               $b_inner_aes_key = base64_encode($inner_aes_key);
+               $inner_iv = random_string(16);
+               $b_inner_iv = base64_encode($inner_iv);
 
-       if ($birthday != "")
-               $birthday = datetime_convert('UTC','UTC',$birthday,'Y-m-d');
+               $outer_aes_key = random_string(32);
+               $b_outer_aes_key = base64_encode($outer_aes_key);
+               $outer_iv = random_string(16);
+               $b_outer_iv = base64_encode($outer_iv);
 
-       // this is to prevent multiple birthday notifications in a single year
-       // if we already have a stored birthday and the 'm-d' part hasn't changed, preserve the entry, which will preserve the notify year
+               $handle = self::my_handle($user);
 
-       if(substr($birthday,5) === substr($contact['bd'],5))
-               $birthday = $contact['bd'];
+               $padded_data = pkcs5_pad($msg,16);
+               $inner_encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $padded_data, MCRYPT_MODE_CBC, $inner_iv);
 
-       /// @TODO Update name on item['author-name'] if the name changed. See consume_feed()
-       /// (Not doing this currently because D* protocol is scheduled for revision soon).
+               $b64_data = base64_encode($inner_encrypted);
 
-       $r = q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `addr` = '%s', `name-date` = '%s', `bd` = '%s',
-                       `location` = '%s', `about` = '%s', `keywords` = '%s', `gender` = '%s' WHERE `id` = %d AND `uid` = %d",
-               dbesc($name),
-               dbesc($nick),
-               dbesc($diaspora_handle),
-               dbesc(datetime_convert()),
-               dbesc($birthday),
-               dbesc($location),
-               dbesc($about),
-               dbesc($keywords),
-               dbesc($gender),
-               intval($contact['id']),
-               intval($importer['uid'])
-       );
 
-       if ($searchable) {
-               require_once('include/socgraph.php');
-               poco_check($contact['url'], $name, NETWORK_DIASPORA, $image_url, $about, $location, $gender, $keywords, "",
-                       datetime_convert(), 2, $contact['id'], $importer['uid']);
-       }
+               $b64url_data = base64url_encode($b64_data);
+               $data = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data);
 
-       update_gcontact(array("url" => $contact['url'], "network" => NETWORK_DIASPORA, "generation" => 2,
-                               "photo" => $image_url, "name" => $name, "location" => $location,
-                               "about" => $about, "birthday" => $birthday, "gender" => $gender,
-                               "addr" => $diaspora_handle, "nick" => $nick, "keywords" => $keywords,
-                               "hide" => !$searchable, "nsfw" => $nsfw));
-
-/*     if($r) {
-               if($oldphotos) {
-                       foreach($oldphotos as $ph) {
-                               q("DELETE FROM `photo` WHERE `uid` = %d AND `contact-id` = %d AND `album` = 'Contact Photos' AND `resource-id` = '%s' ",
-                                       intval($importer['uid']),
-                                       intval($contact['id']),
-                                       dbesc($ph['resource-id'])
-                               );
-                       }
-               }
-       }       */
+               $type = "application/xml";
+               $encoding = "base64url";
+               $alg = "RSA-SHA256";
 
-       return;
+               $signable_data = $data.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg);
 
-}
+               $signature = rsa_sign($signable_data,$prvkey);
+               $sig = base64url_encode($signature);
 
-function diaspora_share($me,$contact) {
-       $a = get_app();
-       $myaddr = $me['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
-       $theiraddr = $contact['addr'];
+               $xmldata = array("decrypted_header" => array("iv" => $b_inner_iv,
+                                                       "aes_key" => $b_inner_aes_key,
+                                                       "author_id" => $handle));
 
-       $tpl = get_markup_template('diaspora_share.tpl');
-       $msg = replace_macros($tpl, array(
-               '$sender' => $myaddr,
-               '$recipient' => $theiraddr
-       ));
+               $decrypted_header = xml::from_array($xmldata, $xml, true);
+               $decrypted_header = pkcs5_pad($decrypted_header,16);
 
-       $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey'])));
-       //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey']));
+               $ciphertext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $outer_aes_key, $decrypted_header, MCRYPT_MODE_CBC, $outer_iv);
 
-       return(diaspora_transmit($owner,$contact,$slap, false));
-}
+               $outer_json = json_encode(array("iv" => $b_outer_iv, "key" => $b_outer_aes_key));
 
-function diaspora_unshare($me,$contact) {
+               $encrypted_outer_key_bundle = "";
+               openssl_public_encrypt($outer_json, $encrypted_outer_key_bundle, $pubkey);
 
-       $a = get_app();
-       $myaddr = $me['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
+               $b64_encrypted_outer_key_bundle = base64_encode($encrypted_outer_key_bundle);
 
-       $tpl = get_markup_template('diaspora_retract.tpl');
-       $msg = replace_macros($tpl, array(
-               '$guid'   => $me['guid'],
-               '$type'   => 'Person',
-               '$handle' => $myaddr
-       ));
+               logger("outer_bundle: ".$b64_encrypted_outer_key_bundle." key: ".$pubkey, LOGGER_DATA);
 
-       $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey'])));
-       //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$me,$contact,$me['prvkey'],$contact['pubkey']));
+               $encrypted_header_json_object = json_encode(array("aes_key" => base64_encode($encrypted_outer_key_bundle),
+                                                               "ciphertext" => base64_encode($ciphertext)));
+               $cipher_json = base64_encode($encrypted_header_json_object);
 
-       return(diaspora_transmit($owner,$contact,$slap, false));
+               $xmldata = array("diaspora" => array("encrypted_header" => $cipher_json,
+                                               "me:env" => array("me:encoding" => "base64url",
+                                                               "me:alg" => "RSA-SHA256",
+                                                               "me:data" => $data,
+                                                               "@attributes" => array("type" => "application/xml"),
+                                                               "me:sig" => $sig)));
 
-}
+               $namespaces = array("" => "https://joindiaspora.com/protocol",
+                               "me" => "http://salmon-protocol.org/ns/magic-env");
+
+               $magic_env = xml::from_array($xmldata, $xml, false, $namespaces);
 
+               logger("magic_env: ".$magic_env, LOGGER_DATA);
+               return $magic_env;
+       }
 
-function diaspora_send_status($item,$owner,$contact,$public_batch = false) {
+       private function build_message($msg, $user, $contact, $prvkey, $pubkey, $public = false) {
 
-       $a = get_app();
-       $myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
-       $theiraddr = $contact['addr'];
+               if ($public)
+                       $magic_env =  self::build_public_message($msg,$user,$contact,$prvkey,$pubkey);
+               else
+                       $magic_env =  self::build_private_message($msg,$user,$contact,$prvkey,$pubkey);
 
-       $images = array();
+               // The data that will be transmitted is double encoded via "urlencode", strange ...
+               $slap = "xml=".urlencode(urlencode($magic_env));
+               return $slap;
+       }
 
-       $title = $item['title'];
-       $body = $item['body'];
+       private function signature($owner, $message) {
+               $sigmsg = $message;
+               unset($sigmsg["author_signature"]);
+               unset($sigmsg["parent_author_signature"]);
 
-/*
-       // We're trying to match Diaspora's split message/photo protocol but
-       // all the photos are displayed on D* as links and not img's - even
-       // though we're sending pretty much precisely what they send us when
-       // doing the same operation.  
-       // Commented out for now, we'll use bb2diaspora to convert photos to markdown
-       // which seems to get through intact.
+               $signed_text = implode(";", $sigmsg);
 
-       $cnt = preg_match_all('|\[img\](.*?)\[\/img\]|',$body,$matches,PREG_SET_ORDER);
-       if($cnt) {
-               foreach($matches as $mtch) {
-                       $detail = array();
-                       $detail['str'] = $mtch[0];
-                       $detail['path'] = dirname($mtch[1]) . '/';
-                       $detail['file'] = basename($mtch[1]);
-                       $detail['guid'] = $item['guid'];
-                       $detail['handle'] = $myaddr;
-                       $images[] = $detail;
-                       $body = str_replace($detail['str'],$mtch[1],$body);
-               }
+               return base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256"));
        }
-*/
 
-       //if(strlen($title))
-       //      $body = "[b]".html_entity_decode($title)."[/b]\n\n".$body;
+       public static function transmit($owner, $contact, $slap, $public_batch, $queue_run=false, $guid = "") {
+
+               $a = get_app();
+
+               $enabled = intval(get_config("system", "diaspora_enabled"));
+               if(!$enabled)
+                       return 200;
 
-       // convert to markdown
-       $body = xmlify(html_entity_decode(bb2diaspora($body)));
-       //$body = bb2diaspora($body);
+               $logid = random_string(4);
+               $dest_url = (($public_batch) ? $contact["batch"] : $contact["notify"]);
+               if (!$dest_url) {
+                       logger("no url for contact: ".$contact["id"]." batch mode =".$public_batch);
+                       return 0;
+               }
 
-       // Adding the title
-       if(strlen($title))
-               $body = "## ".html_entity_decode($title)."\n\n".$body;
+               logger("transmit: ".$logid."-".$guid." ".$dest_url);
 
-       if($item['attach']) {
-               $cnt = preg_match_all('/href=\"(.*?)\"(.*?)title=\"(.*?)\"/ism',$item['attach'],$matches,PREG_SET_ORDER);
-               if(cnt) {
-                       $body .= "\n" . t('Attachments:') . "\n";
-                       foreach($matches as $mtch) {
-                               $body .= '[' . $mtch[3] . '](' . $mtch[1] . ')' . "\n";
+               if (!$queue_run && was_recently_delayed($contact["id"])) {
+                       $return_code = 0;
+               } else {
+                       if (!intval(get_config("system", "diaspora_test"))) {
+                               post_url($dest_url."/", $slap);
+                               $return_code = $a->get_curl_code();
+                       } else {
+                               logger("test_mode");
+                               return 200;
                        }
                }
-       }
 
+               logger("transmit: ".$logid."-".$guid." returns: ".$return_code);
 
-       $public = (($item['private']) ? 'false' : 'true');
+               if(!$return_code || (($return_code == 503) && (stristr($a->get_curl_headers(), "retry-after")))) {
+                       logger("queue message");
 
-       require_once('include/datetime.php');
-       $created = datetime_convert('UTC','UTC',$item['created'],'Y-m-d H:i:s \U\T\C');
+                       $r = q("SELECT `id` FROM `queue` WHERE `cid` = %d AND `network` = '%s' AND `content` = '%s' AND `batch` = %d LIMIT 1",
+                               intval($contact["id"]),
+                               dbesc(NETWORK_DIASPORA),
+                               dbesc($slap),
+                               intval($public_batch)
+                       );
+                       if($r) {
+                               logger("add_to_queue ignored - identical item already in queue");
+                       } else {
+                               // queue message for redelivery
+                               add_to_queue($contact["id"], NETWORK_DIASPORA, $slap, $public_batch);
+                       }
+               }
 
-       // Detect a share element and do a reshare
-       // see: https://github.com/Raven24/diaspora-federation/blob/master/lib/diaspora-federation/entities/reshare.rb
-       if (!$item['private'] AND ($ret = diaspora_is_reshare($item["body"]))) {
-               $tpl = get_markup_template('diaspora_reshare.tpl');
-               $msg = replace_macros($tpl, array(
-                       '$root_handle' => xmlify($ret['root_handle']),
-                       '$root_guid' => $ret['root_guid'],
-                       '$guid' => $item['guid'],
-                       '$handle' => xmlify($myaddr),
-                       '$public' => $public,
-                       '$created' => $created,
-                       '$provider' => $item["app"]
-               ));
-       } else {
-               $tpl = get_markup_template('diaspora_post.tpl');
-               $msg = replace_macros($tpl, array(
-                       '$body' => $body,
-                       '$guid' => $item['guid'],
-                       '$handle' => xmlify($myaddr),
-                       '$public' => $public,
-                       '$created' => $created,
-                       '$provider' => $item["app"]
-               ));
+               return(($return_code) ? $return_code : (-1));
        }
 
-       logger('diaspora_send_status: '.$owner['username'].' -> '.$contact['name'].' base message: '.$msg, LOGGER_DATA);
-       logger('send guid '.$item['guid'], LOGGER_DEBUG);
-
-       $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
-       //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
 
-       $return_code = diaspora_transmit($owner,$contact,$slap,$public_batch,false,$item['guid']);
+       private function build_and_transmit($owner, $contact, $type, $message, $public_batch = false, $guid = "", $spool = false) {
 
-       logger('diaspora_send_status: guid: '.$item['guid'].' result '.$return_code, LOGGER_DEBUG);
+               $data = array("XML" => array("post" => array($type => $message)));
 
-       if(count($images)) {
-               diaspora_send_images($item,$owner,$contact,$images,$public_batch);
-       }
+               $msg = xml::from_array($data, $xml);
 
-       return $return_code;
-}
+               logger('message: '.$msg, LOGGER_DATA);
+               logger('send guid '.$guid, LOGGER_DEBUG);
 
-function diaspora_is_reshare($body) {
-       $body = trim($body);
+               $slap = self::build_message($msg, $owner, $contact, $owner['uprvkey'], $contact['pubkey'], $public_batch);
 
-       // Skip if it isn't a pure repeated messages
-       // Does it start with a share?
-       if (strpos($body, "[share") > 0)
-               return(false);
+               if ($spool) {
+                       add_to_queue($contact['id'], NETWORK_DIASPORA, $slap, $public_batch);
+                       return true;
+               } else
+                       $return_code = self::transmit($owner, $contact, $slap, $public_batch, false, $guid);
 
-       // Does it end with a share?
-       if (strlen($body) > (strrpos($body, "[/share]") + 8))
-               return(false);
+               logger("guid: ".$item["guid"]." result ".$return_code, LOGGER_DEBUG);
 
-       $attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism","$1",$body);
-       // Skip if there is no shared message in there
-       if ($body == $attributes)
-               return(false);
+               return $return_code;
+       }
 
-       $guid = "";
-       preg_match("/guid='(.*?)'/ism", $attributes, $matches);
-       if ($matches[1] != "")
-               $guid = $matches[1];
+       public static function send_share($owner,$contact) {
 
-       preg_match('/guid="(.*?)"/ism', $attributes, $matches);
-       if ($matches[1] != "")
-               $guid = $matches[1];
+               $message = array("sender_handle" => self::my_handle($owner),
+                               "recipient_handle" => $contact["addr"]);
 
-       if ($guid != "") {
-               $r = q("SELECT `contact-id` FROM `item` WHERE `guid` = '%s' AND `network` IN ('%s', '%s') LIMIT 1",
-                       dbesc($guid), NETWORK_DFRN, NETWORK_DIASPORA);
-               if ($r) {
-                       $ret= array();
-                       $ret["root_handle"] = diaspora_handle_from_contact($r[0]["contact-id"]);
-                       $ret["root_guid"] = $guid;
-                       return($ret);
-               }
+               return self::build_and_transmit($owner, $contact, "request", $message);
        }
 
-       $profile = "";
-       preg_match("/profile='(.*?)'/ism", $attributes, $matches);
-       if ($matches[1] != "")
-               $profile = $matches[1];
+       public static function send_unshare($owner,$contact) {
 
-       preg_match('/profile="(.*?)"/ism', $attributes, $matches);
-       if ($matches[1] != "")
-               $profile = $matches[1];
+               $message = array("post_guid" => $owner["guid"],
+                               "diaspora_handle" => self::my_handle($owner),
+                               "type" => "Person");
 
-       $ret= array();
+               return self::build_and_transmit($owner, $contact, "retraction", $message);
+       }
 
-       $ret["root_handle"] = preg_replace("=https?://(.*)/u/(.*)=ism", "$2@$1", $profile);
-       if (($ret["root_handle"] == $profile) OR ($ret["root_handle"] == ""))
-               return(false);
+       public static function is_reshare($body) {
+               $body = trim($body);
 
-       $link = "";
-       preg_match("/link='(.*?)'/ism", $attributes, $matches);
-       if ($matches[1] != "")
-               $link = $matches[1];
+               // Skip if it isn't a pure repeated messages
+               // Does it start with a share?
+               if (strpos($body, "[share") > 0)
+                       return(false);
 
-       preg_match('/link="(.*?)"/ism', $attributes, $matches);
-       if ($matches[1] != "")
-               $link = $matches[1];
+               // Does it end with a share?
+               if (strlen($body) > (strrpos($body, "[/share]") + 8))
+                       return(false);
 
-       $ret["root_guid"] = preg_replace("=https?://(.*)/posts/(.*)=ism", "$2", $link);
-       if (($ret["root_guid"] == $link) OR ($ret["root_guid"] == ""))
-               return(false);
+               $attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism","$1",$body);
+               // Skip if there is no shared message in there
+               if ($body == $attributes)
+                       return(false);
 
-       return($ret);
-}
+               $guid = "";
+               preg_match("/guid='(.*?)'/ism", $attributes, $matches);
+               if ($matches[1] != "")
+                       $guid = $matches[1];
 
-function diaspora_send_images($item,$owner,$contact,$images,$public_batch = false) {
-       $a = get_app();
-       if(! count($images))
-               return;
-       $mysite = substr($a->get_baseurl(),strpos($a->get_baseurl(),'://') + 3) . '/photo';
-
-       $tpl = get_markup_template('diaspora_photo.tpl');
-       foreach($images as $image) {
-               if(! stristr($image['path'],$mysite))
-                       continue;
-               $resource = str_replace('.jpg','',$image['file']);
-               $resource = substr($resource,0,strpos($resource,'-'));
-
-               $r = q("select * from photo where `resource-id` = '%s' and `uid` = %d limit 1",
-                       dbesc($resource),
-                       intval($owner['uid'])
-               );
-               if(! count($r))
-                       continue;
-               $public = (($r[0]['allow_cid'] || $r[0]['allow_gid'] || $r[0]['deny_cid'] || $r[0]['deny_gid']) ? 'false' : 'true' );
-               $msg = replace_macros($tpl,array(
-                       '$path' => xmlify($image['path']),
-                       '$filename' => xmlify($image['file']),
-                       '$msg_guid' => xmlify($image['guid']),
-                       '$guid' => xmlify($r[0]['guid']),
-                       '$handle' => xmlify($image['handle']),
-                       '$public' => xmlify($public),
-                       '$created_at' => xmlify(datetime_convert('UTC','UTC',$r[0]['created'],'Y-m-d H:i:s \U\T\C'))
-               ));
+               preg_match('/guid="(.*?)"/ism', $attributes, $matches);
+               if ($matches[1] != "")
+                       $guid = $matches[1];
 
+               if ($guid != "") {
+                       $r = q("SELECT `contact-id` FROM `item` WHERE `guid` = '%s' AND `network` IN ('%s', '%s') LIMIT 1",
+                               dbesc($guid), NETWORK_DFRN, NETWORK_DIASPORA);
+                       if ($r) {
+                               $ret= array();
+                               $ret["root_handle"] = self::handle_from_contact($r[0]["contact-id"]);
+                               $ret["root_guid"] = $guid;
+                               return($ret);
+                       }
+               }
 
-               logger('diaspora_send_photo: base message: ' . $msg, LOGGER_DATA);
-               logger('send guid '.$r[0]['guid'], LOGGER_DEBUG);
+               $profile = "";
+               preg_match("/profile='(.*?)'/ism", $attributes, $matches);
+               if ($matches[1] != "")
+                       $profile = $matches[1];
 
-               $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
-               //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
+               preg_match('/profile="(.*?)"/ism', $attributes, $matches);
+               if ($matches[1] != "")
+                       $profile = $matches[1];
 
-               diaspora_transmit($owner,$contact,$slap,$public_batch,false,$r[0]['guid']);
-       }
+               $ret= array();
 
-}
+               $ret["root_handle"] = preg_replace("=https?://(.*)/u/(.*)=ism", "$2@$1", $profile);
+               if (($ret["root_handle"] == $profile) OR ($ret["root_handle"] == ""))
+                       return(false);
 
-function diaspora_send_followup($item,$owner,$contact,$public_batch = false) {
+               $link = "";
+               preg_match("/link='(.*?)'/ism", $attributes, $matches);
+               if ($matches[1] != "")
+                       $link = $matches[1];
 
-       $a = get_app();
-       $myaddr = $owner['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
-//     $theiraddr = $contact['addr'];
+               preg_match('/link="(.*?)"/ism', $attributes, $matches);
+               if ($matches[1] != "")
+                       $link = $matches[1];
 
-       // Diaspora doesn't support threaded comments, but some
-       // versions of Diaspora (i.e. Diaspora-pistos) support
-       // likes on comments
-       if($item['verb'] === ACTIVITY_LIKE && $item['thr-parent']) {
-               $p = q("select guid, type, uri, `parent-uri` from item where uri = '%s' limit 1",
-                       dbesc($item['thr-parent'])
-                     );
-       }
-       else {
-               // The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always
-               // return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent.
-               // The only item with `parent` and `id` as the parent id is the parent item.
-               $p = q("select guid, type, uri, `parent-uri` from item where parent = %d and id = %d limit 1",
-                       intval($item['parent']),
-                       intval($item['parent'])
-               );
-       }
-       if(count($p))
-               $parent = $p[0];
-       else
-               return;
-
-       if($item['verb'] === ACTIVITY_LIKE) {
-               $tpl = get_markup_template('diaspora_like.tpl');
-               $like = true;
-               $target_type = ( $parent['uri'] === $parent['parent-uri']  ? 'Post' : 'Comment');
-//             $target_type = (strpos($parent['type'], 'comment') ? 'Comment' : 'Post');
-//             $positive = (($item['deleted']) ? 'false' : 'true');
-               $positive = 'true';
-
-               if(($item['deleted']))
-                       logger('diaspora_send_followup: received deleted "like". Those should go to diaspora_send_retraction');
-       }
-       else {
-               $tpl = get_markup_template('diaspora_comment.tpl');
-               $like = false;
+               $ret["root_guid"] = preg_replace("=https?://(.*)/posts/(.*)=ism", "$2", $link);
+               if (($ret["root_guid"] == $link) OR ($ret["root_guid"] == ""))
+                       return(false);
+               return($ret);
        }
 
-       $text = html_entity_decode(bb2diaspora($item['body']));
+       public static function send_status($item, $owner, $contact, $public_batch = false) {
 
-       // sign it
+               $myaddr = self::my_handle($owner);
 
-       if($like)
-               $signed_text =  $positive . ';' . $item['guid'] . ';' . $target_type . ';' . $parent['guid'] . ';' . $myaddr;
-       else
-               $signed_text = $item['guid'] . ';' . $parent['guid'] . ';' . $text . ';' . $myaddr;
+               $public = (($item["private"]) ? "false" : "true");
 
-       $authorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
+               $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d H:i:s \U\T\C');
 
-       $msg = replace_macros($tpl,array(
-               '$guid' => xmlify($item['guid']),
-               '$parent_guid' => xmlify($parent['guid']),
-               '$target_type' =>xmlify($target_type),
-               '$authorsig' => xmlify($authorsig),
-               '$body' => xmlify($text),
-               '$positive' => xmlify($positive),
-               '$handle' => xmlify($myaddr)
-       ));
+               // Detect a share element and do a reshare
+               if (!$item['private'] AND ($ret = self::is_reshare($item["body"]))) {
+                       $message = array("root_diaspora_id" => $ret["root_handle"],
+                                       "root_guid" => $ret["root_guid"],
+                                       "guid" => $item["guid"],
+                                       "diaspora_handle" => $myaddr,
+                                       "public" => $public,
+                                       "created_at" => $created,
+                                       "provider_display_name" => $item["app"]);
 
-       logger('diaspora_followup: base message: ' . $msg, LOGGER_DATA);
-       logger('send guid '.$item['guid'], LOGGER_DEBUG);
+                       $type = "reshare";
+               } else {
+                       $title = $item["title"];
+                       $body = $item["body"];
 
-       $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
-       //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
+                       // convert to markdown
+                       $body = html_entity_decode(bb2diaspora($body));
 
-       return(diaspora_transmit($owner,$contact,$slap,$public_batch,false,$item['guid']));
-}
+                       // Adding the title
+                       if(strlen($title))
+                               $body = "## ".html_entity_decode($title)."\n\n".$body;
 
+                       if ($item["attach"]) {
+                               $cnt = preg_match_all('/href=\"(.*?)\"(.*?)title=\"(.*?)\"/ism', $item["attach"], $matches, PREG_SET_ORDER);
+                               if(cnt) {
+                                       $body .= "\n".t("Attachments:")."\n";
+                                       foreach($matches as $mtch)
+                                               $body .= "[".$mtch[3]."](".$mtch[1].")\n";
+                               }
+                       }
 
-function diaspora_send_relay($item,$owner,$contact,$public_batch = false) {
+                       $location = array();
 
+                       if ($item["location"] != "")
+                               $location["address"] = $item["location"];
 
-       $a = get_app();
-       $myaddr = $owner['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
-//     $theiraddr = $contact['addr'];
+                       if ($item["coord"] != "") {
+                               $coord = explode(" ", $item["coord"]);
+                               $location["lat"] = $coord[0];
+                               $location["lng"] = $coord[1];
+                       }
 
-       // Diaspora doesn't support threaded comments, but some
-       // versions of Diaspora (i.e. Diaspora-pistos) support
-       // likes on comments
-       if($item['verb'] === ACTIVITY_LIKE && $item['thr-parent']) {
-               $p = q("select guid, type, uri, `parent-uri` from item where uri = '%s' limit 1",
-                       dbesc($item['thr-parent'])
-                     );
-       }
-       else {
-               // The first item in the `item` table with the parent id is the parent. However, MySQL doesn't always
-               // return the items ordered by `item`.`id`, in which case the wrong item is chosen as the parent.
-               // The only item with `parent` and `id` as the parent id is the parent item.
-               $p = q("select guid, type, uri, `parent-uri` from item where parent = %d and id = %d limit 1",
-                      intval($item['parent']),
-                      intval($item['parent'])
-                     );
-       }
-       if(count($p))
-               $parent = $p[0];
-       else
-               return;
+                       $message = array("raw_message" => $body,
+                                       "location" => $location,
+                                       "guid" => $item["guid"],
+                                       "diaspora_handle" => $myaddr,
+                                       "public" => $public,
+                                       "created_at" => $created,
+                                       "provider_display_name" => $item["app"]);
 
-       $like = false;
-       $relay_retract = false;
-       $sql_sign_id = 'iid';
-       if( $item['deleted']) {
-               $relay_retract = true;
+                       if (count($location) == 0)
+                               unset($message["location"]);
 
-               $target_type = ( ($item['verb'] === ACTIVITY_LIKE) ? 'Like' : 'Comment');
+                       $type = "status_message";
+               }
 
-               $sql_sign_id = 'retract_iid';
-               $tpl = get_markup_template('diaspora_relayable_retraction.tpl');
+               return self::build_and_transmit($owner, $contact, $type, $message, $public_batch, $item["guid"]);
        }
-       elseif($item['verb'] === ACTIVITY_LIKE) {
-               $like = true;
 
-               $target_type = ( $parent['uri'] === $parent['parent-uri']  ? 'Post' : 'Comment');
-//             $positive = (($item['deleted']) ? 'false' : 'true');
-               $positive = 'true';
+       private function construct_like($item, $owner) {
 
-               $tpl = get_markup_template('diaspora_like_relay.tpl');
-       }
-       else { // item is a comment
-               $tpl = get_markup_template('diaspora_comment_relay.tpl');
-       }
+               $myaddr = self::my_handle($owner);
 
+               $p = q("SELECT `guid`, `uri`, `parent-uri` FROM `item` WHERE `uri` = '%s' LIMIT 1",
+                       dbesc($item["thr-parent"]));
+               if(!$p)
+                       return false;
 
-       // fetch the original signature if the relayable was created by a Diaspora
-       // or DFRN user. Relayables for other networks are not supported.
-
-       $r = q("SELECT `signed_text`, `signature`, `signer` FROM `sign` WHERE " . $sql_sign_id . " = %d LIMIT 1",
-               intval($item['id'])
-       );
-       if(count($r)) {
-               $orig_sign = $r[0];
-               $signed_text = $orig_sign['signed_text'];
-               $authorsig = $orig_sign['signature'];
-               $handle = $orig_sign['signer'];
+               $parent = $p[0];
 
-               // Split the signed text
-               $signed_parts = explode(";", $signed_text);
+               $target_type = ($parent["uri"] === $parent["parent-uri"] ? "Post" : "Comment");
+               $positive = "true";
 
-               // Remove the parent guid
-               array_shift($signed_parts);
+               return(array("positive" => $positive,
+                               "guid" => $item["guid"],
+                               "target_type" => $target_type,
+                               "parent_guid" => $parent["guid"],
+                               "author_signature" => $authorsig,
+                               "diaspora_handle" => $myaddr));
+       }
 
-               // Remove the comment guid
-               array_shift($signed_parts);
+       private function construct_comment($item, $owner) {
 
-               // Remove the handle
-               array_pop($signed_parts);
+               $myaddr = self::my_handle($owner);
 
-               // Glue the parts together
-               $text = implode(";", $signed_parts);
-       }
-       else {
-               // This part is meant for cases where we don't have the signatur. (Which shouldn't happen with posts from Diaspora and Friendica)
-               // This means that the comment won't be accepted by newer Diaspora servers
+               $p = q("SELECT `guid` FROM `item` WHERE `parent` = %d AND `id` = %d LIMIT 1",
+                       intval($item["parent"]),
+                       intval($item["parent"])
+               );
 
-               $body = $item['body'];
-               $text = html_entity_decode(bb2diaspora($body));
+               if (!$p)
+                       return false;
 
-               $handle = diaspora_handle_from_contact($item['contact-id']);
-               if(! $handle)
-                       return;
+               $parent = $p[0];
 
-               if($relay_retract)
-                       $signed_text = $item['guid'] . ';' . $target_type;
-               elseif($like)
-                       $signed_text = $item['guid'] . ';' . $target_type . ';' . $parent['guid'] . ';' . $positive . ';' . $handle;
-               else
-                       $signed_text = $item['guid'] . ';' . $parent['guid'] . ';' . $text . ';' . $handle;
+               $text = html_entity_decode(bb2diaspora($item["body"]));
 
-               $authorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
+               return(array("guid" => $item["guid"],
+                               "parent_guid" => $parent["guid"],
+                               "author_signature" => "",
+                               "text" => $text,
+                               "diaspora_handle" => $myaddr));
        }
 
-       // Sign the relayable with the top-level owner's signature
-       $parentauthorsig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
-
-       $msg = replace_macros($tpl,array(
-               '$guid' => xmlify($item['guid']),
-               '$parent_guid' => xmlify($parent['guid']),
-               '$target_type' =>xmlify($target_type),
-               '$authorsig' => xmlify($authorsig),
-               '$parentsig' => xmlify($parentauthorsig),
-               '$body' => xmlify($text),
-               '$positive' => xmlify($positive),
-               '$handle' => xmlify($handle)
-       ));
+       public static function send_followup($item,$owner,$contact,$public_batch = false) {
 
-       logger('diaspora_send_relay: base message: ' . $msg, LOGGER_DATA);
-       logger('send guid '.$item['guid'], LOGGER_DEBUG);
-
-       $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
-       //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
+               if($item['verb'] === ACTIVITY_LIKE) {
+                       $message = self::construct_like($item, $owner);
+                       $type = "like";
+               } else {
+                       $message = self::construct_comment($item, $owner);
+                       $type = "comment";
+               }
 
-       return(diaspora_transmit($owner,$contact,$slap,$public_batch,false,$item['guid']));
+               if (!$message)
+                       return false;
 
-}
+               $message["author_signature"] = self::signature($owner, $message);
 
+               return self::build_and_transmit($owner, $contact, $type, $message, $public_batch, $item["guid"]);
+       }
 
+       private function message_from_signatur($item, $signature) {
 
-function diaspora_send_retraction($item,$owner,$contact,$public_batch = false) {
+               // Split the signed text
+               $signed_parts = explode(";", $signature['signed_text']);
+
+               if ($item["deleted"])
+                       $message = array("parent_author_signature" => "",
+                                       "target_guid" => $signed_parts[0],
+                                       "target_type" => $signed_parts[1],
+                                       "sender_handle" => $signature['signer'],
+                                       "target_author_signature" => $signature['signature']);
+               elseif ($item['verb'] === ACTIVITY_LIKE)
+                       $message = array("positive" => $signed_parts[0],
+                                       "guid" => $signed_parts[1],
+                                       "target_type" => $signed_parts[2],
+                                       "parent_guid" => $signed_parts[3],
+                                       "parent_author_signature" => "",
+                                       "author_signature" => $signature['signature'],
+                                       "diaspora_handle" => $signed_parts[4]);
+               else {
+                       // Remove the comment guid
+                       $guid = array_shift($signed_parts);
 
-       $a = get_app();
-       $myaddr = $owner['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
+                       // Remove the parent guid
+                       $parent_guid = array_shift($signed_parts);
 
-       // Check whether the retraction is for a top-level post or whether it's a relayable
-       if( $item['uri'] !== $item['parent-uri'] ) {
+                       // Remove the handle
+                       $handle = array_pop($signed_parts);
 
-               $tpl = get_markup_template('diaspora_relay_retraction.tpl');
-               $target_type = (($item['verb'] === ACTIVITY_LIKE) ? 'Like' : 'Comment');
-       }
-       else {
+                       // Glue the parts together
+                       $text = implode(";", $signed_parts);
 
-               $tpl = get_markup_template('diaspora_signed_retract.tpl');
-               $target_type = 'StatusMessage';
+                       $message = array("guid" => $guid,
+                                       "parent_guid" => $parent_guid,
+                                       "parent_author_signature" => "",
+                                       "author_signature" => $signature['signature'],
+                                       "text" => implode(";", $signed_parts),
+                                       "diaspora_handle" => $handle);
+               }
+               return $message;
        }
 
-       $signed_text = $item['guid'] . ';' . $target_type;
+       public static function send_relay($item, $owner, $contact, $public_batch = false) {
 
-       $msg = replace_macros($tpl, array(
-               '$guid'   => xmlify($item['guid']),
-               '$type'   => xmlify($target_type),
-               '$handle' => xmlify($myaddr),
-               '$signature' => xmlify(base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256')))
-       ));
-
-       logger('send guid '.$item['guid'], LOGGER_DEBUG);
-
-       $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch)));
-       //$slap = 'xml=' . urlencode(diaspora_msg_build($msg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],$public_batch));
-
-       return(diaspora_transmit($owner,$contact,$slap,$public_batch,false,$item['guid']));
-}
+               if ($item["deleted"]) {
+                       $sql_sign_id = "retract_iid";
+                       $type = "relayable_retraction";
+               } elseif ($item['verb'] === ACTIVITY_LIKE) {
+                       $sql_sign_id = "iid";
+                       $type = "like";
+               } else {
+                       $sql_sign_id = "iid";
+                       $type = "comment";
+               }
 
-function diaspora_send_mail($item,$owner,$contact) {
+               logger("Got relayable data ".$type." for item ".$item["guid"]." (".$item["id"].")", LOGGER_DEBUG);
 
-       $a = get_app();
-       $myaddr = $owner['nickname'] . '@' .  substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
+               // fetch the original signature
 
-       $r = q("select * from conv where id = %d and uid = %d limit 1",
-               intval($item['convid']),
-               intval($item['uid'])
-       );
+               $r = q("SELECT `signed_text`, `signature`, `signer` FROM `sign` WHERE `".$sql_sign_id."` = %d LIMIT 1",
+                       intval($item["id"]));
 
-       if(! count($r)) {
-               logger('diaspora_send_mail: conversation not found.');
-               return;
-       }
-       $cnv = $r[0];
-
-       $conv = array(
-               'guid' => xmlify($cnv['guid']),
-               'subject' => xmlify($cnv['subject']),
-               'created_at' => xmlify(datetime_convert('UTC','UTC',$cnv['created'],'Y-m-d H:i:s \U\T\C')),
-               'diaspora_handle' => xmlify($cnv['creator']),
-               'participant_handles' => xmlify($cnv['recips'])
-       );
-
-       $body = bb2diaspora($item['body']);
-       $created = datetime_convert('UTC','UTC',$item['created'],'Y-m-d H:i:s \U\T\C');
-
-       $signed_text =  $item['guid'] . ';' . $cnv['guid'] . ';' . $body .  ';'
-               . $created . ';' . $myaddr . ';' . $cnv['guid'];
-
-       $sig = base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256'));
-
-       $msg = array(
-               'guid' => xmlify($item['guid']),
-               'parent_guid' => xmlify($cnv['guid']),
-               'parent_author_signature' => xmlify($sig),
-               'author_signature' => xmlify($sig),
-               'text' => xmlify($body),
-               'created_at' => xmlify($created),
-               'diaspora_handle' => xmlify($myaddr),
-               'conversation_guid' => xmlify($cnv['guid'])
-       );
-
-       if($item['reply']) {
-               $tpl = get_markup_template('diaspora_message.tpl');
-               $xmsg = replace_macros($tpl, array('$msg' => $msg));
-       }
-       else {
-               $conv['messages'] = array($msg);
-               $tpl = get_markup_template('diaspora_conversation.tpl');
-               $xmsg = replace_macros($tpl, array('$conv' => $conv));
-       }
+               if (!$r)
+                       return self::send_followup($item, $owner, $contact, $public_batch);
 
-       logger('diaspora_conversation: ' . print_r($xmsg,true), LOGGER_DATA);
-       logger('send guid '.$item['guid'], LOGGER_DEBUG);
+               $signature = $r[0];
 
-       $slap = 'xml=' . urlencode(urlencode(diaspora_msg_build($xmsg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],false)));
-       //$slap = 'xml=' . urlencode(diaspora_msg_build($xmsg,$owner,$contact,$owner['uprvkey'],$contact['pubkey'],false));
+               // Old way - is used by the internal Friendica functions
+               /// @todo Change all signatur storing functions to the new format
+               if ($signature['signed_text'] AND $signature['signature'] AND $signature['signer'])
+                       $message = self::message_from_signatur($item, $signature);
+               else {// New way
+                       $msg = json_decode($signature['signed_text'], true);
 
-       return(diaspora_transmit($owner,$contact,$slap,false,false,$item['guid']));
+                       $message = array();
+                       foreach ($msg AS $field => $data) {
+                               if (!$item["deleted"]) {
+                                       if ($field == "author")
+                                               $field = "diaspora_handle";
+                                       if ($field == "parent_type")
+                                               $field = "target_type";
+                               }
 
+                               $message[$field] = $data;
+                       }
+               }
 
-}
+               if ($item["deleted"]) {
+                       $signed_text = $message["target_guid"].';'.$message["target_type"];
+                       $message["parent_author_signature"] = base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256"));
+               } else
+                       $message["parent_author_signature"] = self::signature($owner, $message);
 
-function diaspora_transmit($owner,$contact,$slap,$public_batch,$queue_run=false,$guid = "") {
+               logger("Relayed data ".print_r($message, true), LOGGER_DEBUG);
 
-       $enabled = intval(get_config('system','diaspora_enabled'));
-       if(! $enabled) {
-               return 200;
+               return self::build_and_transmit($owner, $contact, $type, $message, $public_batch, $item["guid"]);
        }
 
-       $a = get_app();
-       $logid = random_string(4);
-       $dest_url = (($public_batch) ? $contact['batch'] : $contact['notify']);
-       if(! $dest_url) {
-               logger('diaspora_transmit: no url for contact: ' . $contact['id'] . ' batch mode =' . $public_batch);
-               return 0;
-       }
+       public static function send_retraction($item, $owner, $contact, $public_batch = false) {
 
-       logger('diaspora_transmit: '.$logid.'-'.$guid.' '.$dest_url);
+               $myaddr = self::my_handle($owner);
 
-       if( (! $queue_run) && (was_recently_delayed($contact['id'])) ) {
-               $return_code = 0;
-       }
-       else {
-               if (!intval(get_config('system','diaspora_test'))) {
-                       post_url($dest_url . '/', $slap);
-                       $return_code = $a->get_curl_code();
+               // Check whether the retraction is for a top-level post or whether it's a relayable
+               if ($item["uri"] !== $item["parent-uri"]) {
+                       $msg_type = "relayable_retraction";
+                       $target_type = (($item["verb"] === ACTIVITY_LIKE) ? "Like" : "Comment");
                } else {
-                       logger('diaspora_transmit: test_mode');
-                       return 200;
+                       $msg_type = "signed_retraction";
+                       $target_type = "StatusMessage";
                }
+
+               $signed_text = $item["guid"].";".$target_type;
+
+               $message = array("target_guid" => $item['guid'],
+                               "target_type" => $target_type,
+                               "sender_handle" => $myaddr,
+                               "target_author_signature" => base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256')));
+
+               return self::build_and_transmit($owner, $contact, $msg_type, $message, $public_batch, $item["guid"]);
        }
 
-       logger('diaspora_transmit: '.$logid.'-'.$guid.' returns: '.$return_code);
+       public static function send_mail($item, $owner, $contact) {
 
-       if((! $return_code) || (($return_code == 503) && (stristr($a->get_curl_headers(),'retry-after')))) {
-               logger('diaspora_transmit: queue message');
+               $myaddr = self::my_handle($owner);
 
-               $r = q("SELECT id from queue where cid = %d and network = '%s' and content = '%s' and batch = %d limit 1",
-                       intval($contact['id']),
-                       dbesc(NETWORK_DIASPORA),
-                       dbesc($slap),
-                       intval($public_batch)
+               $r = q("SELECT * FROM `conv` WHERE `id` = %d AND `uid` = %d LIMIT 1",
+                       intval($item["convid"]),
+                       intval($item["uid"])
                );
-               if(count($r)) {
-                       logger('diaspora_transmit: add_to_queue ignored - identical item already in queue');
-               }
-               else {
-                       // queue message for redelivery
-                       add_to_queue($contact['id'],NETWORK_DIASPORA,$slap,$public_batch);
-               }
-       }
 
+               if (!$r) {
+                       logger("conversation not found.");
+                       return;
+               }
+               $cnv = $r[0];
+
+               $conv = array(
+                       "guid" => $cnv["guid"],
+                       "subject" => $cnv["subject"],
+                       "created_at" => datetime_convert("UTC", "UTC", $cnv['created'], 'Y-m-d H:i:s \U\T\C'),
+                       "diaspora_handle" => $cnv["creator"],
+                       "participant_handles" => $cnv["recips"]
+               );
 
-       return(($return_code) ? $return_code : (-1));
-}
+               $body = bb2diaspora($item["body"]);
+               $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d H:i:s \U\T\C');
+
+               $signed_text = $item["guid"].";".$cnv["guid"].";".$body.";".$created.";".$myaddr.";".$cnv['guid'];
+               $sig = base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256"));
+
+               $msg = array(
+                       "guid" => $item["guid"],
+                       "parent_guid" => $cnv["guid"],
+                       "parent_author_signature" => $sig,
+                       "author_signature" => $sig,
+                       "text" => $body,
+                       "created_at" => $created,
+                       "diaspora_handle" => $myaddr,
+                       "conversation_guid" => $cnv["guid"]
+               );
 
-function diaspora_fetch_relay() {
+               if ($item["reply"]) {
+                       $message = $msg;
+                       $type = "message";
+               } else {
+                       $message = array("guid" => $cnv["guid"],
+                                       "subject" => $cnv["subject"],
+                                       "created_at" => datetime_convert("UTC", "UTC", $cnv['created'], 'Y-m-d H:i:s \U\T\C'),
+                                       "message" => $msg,
+                                       "diaspora_handle" => $cnv["creator"],
+                                       "participant_handles" => $cnv["recips"]);
+
+                       $type = "conversation";
+               }
 
-       $serverdata = get_config("system", "relay_server");
-       if ($serverdata == "")
-               return array();
+               return self::build_and_transmit($owner, $contact, $type, $message, false, $item["guid"]);
+       }
 
-       $relay = array();
+       public static function send_profile($uid) {
 
-       $servers = explode(",", $serverdata);
+               if (!$uid)
+                       return;
 
-       foreach($servers AS $server) {
-               $server = trim($server);
-               $batch = $server."/receive/public";
+               $recips = q("SELECT `id`,`name`,`network`,`pubkey`,`notify` FROM `contact` WHERE `network` = '%s'
+                       AND `uid` = %d AND `rel` != %d",
+                       dbesc(NETWORK_DIASPORA),
+                       intval($uid),
+                       intval(CONTACT_IS_SHARING)
+               );
+               if (!$recips)
+                       return;
 
-               $relais = q("SELECT `batch`, `id`, `name`,`network` FROM `contact` WHERE `uid` = 0 AND `batch` = '%s' LIMIT 1", dbesc($batch));
+               $r = q("SELECT `profile`.`uid` AS `profile_uid`, `profile`.* , `user`.*, `user`.`prvkey` AS `uprvkey`, `contact`.`addr`
+                       FROM `profile`
+                       INNER JOIN `user` ON `profile`.`uid` = `user`.`uid`
+                       INNER JOIN `contact` ON `profile`.`uid` = `contact`.`uid`
+                       WHERE `user`.`uid` = %d AND `profile`.`is-default` AND `contact`.`self` LIMIT 1",
+                       intval($uid)
+               );
 
-               if (!$relais) {
-                       $addr = "relay@".str_replace("http://", "", normalise_link($server));
+               if (!$r)
+                       return;
 
-                       $r = q("INSERT INTO `contact` (`uid`, `created`, `name`, `nick`, `addr`, `url`, `nurl`, `batch`, `network`, `rel`, `blocked`, `pending`, `writable`, `name-date`, `uri-date`, `avatar-date`)
-                               VALUES (0, '%s', '%s', 'relay', '%s', '%s', '%s', '%s', '%s', %d, 0, 0, 1, '%s', '%s', '%s')",
-                               datetime_convert(),
-                               dbesc($addr),
-                               dbesc($addr),
-                               dbesc($server),
-                               dbesc(normalise_link($server)),
-                               dbesc($batch),
-                               dbesc(NETWORK_DIASPORA),
-                               intval(CONTACT_IS_FOLLOWER),
-                               dbesc(datetime_convert()),
-                               dbesc(datetime_convert()),
-                               dbesc(datetime_convert())
-                       );
+               $profile = $r[0];
+
+               $handle = $profile["addr"];
+               $first = ((strpos($profile['name'],' ')
+                       ? trim(substr($profile['name'],0,strpos($profile['name'],' '))) : $profile['name']));
+               $last = (($first === $profile['name']) ? '' : trim(substr($profile['name'], strlen($first))));
+               $large = App::get_baseurl().'/photo/custom/300/'.$profile['uid'].'.jpg';
+               $medium = App::get_baseurl().'/photo/custom/100/'.$profile['uid'].'.jpg';
+               $small = App::get_baseurl().'/photo/custom/50/'  .$profile['uid'].'.jpg';
+               $searchable = (($profile['publish'] && $profile['net-publish']) ? 'true' : 'false');
+
+               if ($searchable === 'true') {
+                       $dob = '1000-00-00';
+
+                       if (($profile['dob']) && ($profile['dob'] != '0000-00-00'))
+                               $dob = ((intval($profile['dob'])) ? intval($profile['dob']) : '1000') .'-'. datetime_convert('UTC','UTC',$profile['dob'],'m-d');
+
+                       $about = $profile['about'];
+                       $about = strip_tags(bbcode($about));
+
+                       $location = formatted_location($profile);
+                       $tags = '';
+                       if ($profile['pub_keywords']) {
+                               $kw = str_replace(',',' ',$profile['pub_keywords']);
+                               $kw = str_replace('  ',' ',$kw);
+                               $arr = explode(' ',$profile['pub_keywords']);
+                               if (count($arr)) {
+                                       for($x = 0; $x < 5; $x ++) {
+                                               if (trim($arr[$x]))
+                                                       $tags .= '#'. trim($arr[$x]) .' ';
+                                       }
+                               }
+                       }
+                       $tags = trim($tags);
+               }
 
-                       $relais = q("SELECT `batch`, `id`, `name`,`network` FROM `contact` WHERE `uid` = 0 AND `batch` = '%s' LIMIT 1", dbesc($batch));
-                       if ($relais)
-                               $relay[] = $relais[0];
-               } else
-                       $relay[] = $relais[0];
+               $message = array("diaspora_handle" => $handle,
+                               "first_name" => $first,
+                               "last_name" => $last,
+                               "image_url" => $large,
+                               "image_url_medium" => $medium,
+                               "image_url_small" => $small,
+                               "birthday" => $dob,
+                               "gender" => $profile['gender'],
+                               "bio" => $about,
+                               "location" => $location,
+                               "searchable" => $searchable,
+                               "tag_string" => $tags);
+
+               foreach($recips as $recip)
+                       self::build_and_transmit($profile, $recip, "profile", $message, false, "", true);
        }
-
-       return $relay;
 }
+?>
diff --git a/include/diaspora2.php b/include/diaspora2.php
deleted file mode 100644 (file)
index 75cedec..0000000
+++ /dev/null
@@ -1,2553 +0,0 @@
-<?php
-/**
- * @file include/diaspora.php
- * @brief The implementation of the diaspora protocol
- */
-
-require_once("include/items.php");
-require_once("include/bb2diaspora.php");
-require_once("include/Scrape.php");
-require_once("include/Contact.php");
-require_once("include/Photo.php");
-require_once("include/socgraph.php");
-require_once("include/group.php");
-require_once("include/xml.php");
-require_once("include/datetime.php");
-
-/**
- * @brief This class contain functions to create and send Diaspora XML files
- *
- */
-class diaspora {
-
-       public static function relay_list() {
-
-               $serverdata = get_config("system", "relay_server");
-               if ($serverdata == "")
-                       return array();
-
-               $relay = array();
-
-               $servers = explode(",", $serverdata);
-
-               foreach($servers AS $server) {
-                       $server = trim($server);
-                       $batch = $server."/receive/public";
-
-                       $relais = q("SELECT `batch`, `id`, `name`,`network` FROM `contact` WHERE `uid` = 0 AND `batch` = '%s' LIMIT 1", dbesc($batch));
-
-                       if (!$relais) {
-                               $addr = "relay@".str_replace("http://", "", normalise_link($server));
-
-                               $r = q("INSERT INTO `contact` (`uid`, `created`, `name`, `nick`, `addr`, `url`, `nurl`, `batch`, `network`, `rel`, `blocked`, `pending`, `writable`, `name-date`, `uri-date`, `avatar-date`)
-                                       VALUES (0, '%s', '%s', 'relay', '%s', '%s', '%s', '%s', '%s', %d, 0, 0, 1, '%s', '%s', '%s')",
-                                       datetime_convert(),
-                                       dbesc($addr),
-                                       dbesc($addr),
-                                       dbesc($server),
-                                       dbesc(normalise_link($server)),
-                                       dbesc($batch),
-                                       dbesc(NETWORK_DIASPORA),
-                                       intval(CONTACT_IS_FOLLOWER),
-                                       dbesc(datetime_convert()),
-                                       dbesc(datetime_convert()),
-                                       dbesc(datetime_convert())
-                               );
-
-                               $relais = q("SELECT `batch`, `id`, `name`,`network` FROM `contact` WHERE `uid` = 0 AND `batch` = '%s' LIMIT 1", dbesc($batch));
-                               if ($relais)
-                                       $relay[] = $relais[0];
-                       } else
-                               $relay[] = $relais[0];
-               }
-
-               return $relay;
-       }
-
-       function repair_signature($signature, $handle = "", $level = 1) {
-
-               if ($signature == "")
-                       return ($signature);
-
-               if (base64_encode(base64_decode(base64_decode($signature))) == base64_decode($signature)) {
-                       $signature = base64_decode($signature);
-                       logger("Repaired double encoded signature from Diaspora/Hubzilla handle ".$handle." - level ".$level, LOGGER_DEBUG);
-
-                       // Do a recursive call to be able to fix even multiple levels
-                       if ($level < 10)
-                               $signature = self::repair_signature($signature, $handle, ++$level);
-               }
-
-               return($signature);
-       }
-
-       /**
-        * @brief: Decodes incoming Diaspora message
-        *
-        * @param array $importer from user table
-        * @param string $xml urldecoded Diaspora salmon
-        *
-        * @return array
-        * 'message' -> decoded Diaspora XML message
-        * 'author' -> author diaspora handle
-        * 'key' -> author public key (converted to pkcs#8)
-        */
-       function decode($importer, $xml) {
-
-               $public = false;
-               $basedom = parse_xml_string($xml);
-
-               if (!is_object($basedom))
-                       return false;
-
-               $children = $basedom->children('https://joindiaspora.com/protocol');
-
-               if($children->header) {
-                       $public = true;
-                       $author_link = str_replace('acct:','',$children->header->author_id);
-               } else {
-
-                       $encrypted_header = json_decode(base64_decode($children->encrypted_header));
-
-                       $encrypted_aes_key_bundle = base64_decode($encrypted_header->aes_key);
-                       $ciphertext = base64_decode($encrypted_header->ciphertext);
-
-                       $outer_key_bundle = '';
-                       openssl_private_decrypt($encrypted_aes_key_bundle,$outer_key_bundle,$importer['prvkey']);
-
-                       $j_outer_key_bundle = json_decode($outer_key_bundle);
-
-                       $outer_iv = base64_decode($j_outer_key_bundle->iv);
-                       $outer_key = base64_decode($j_outer_key_bundle->key);
-
-                       $decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $outer_key, $ciphertext, MCRYPT_MODE_CBC, $outer_iv);
-
-
-                       $decrypted = pkcs5_unpad($decrypted);
-
-                       /**
-                        * $decrypted now contains something like
-                        *
-                        *  <decrypted_header>
-                        *     <iv>8e+G2+ET8l5BPuW0sVTnQw==</iv>
-                        *     <aes_key>UvSMb4puPeB14STkcDWq+4QE302Edu15oaprAQSkLKU=</aes_key>
-                        *     <author_id>galaxor@diaspora.priateship.org</author_id>
-                        *  </decrypted_header>
-                        */
-
-                       logger('decrypted: '.$decrypted, LOGGER_DEBUG);
-                       $idom = parse_xml_string($decrypted,false);
-
-                       $inner_iv = base64_decode($idom->iv);
-                       $inner_aes_key = base64_decode($idom->aes_key);
-
-                       $author_link = str_replace('acct:','',$idom->author_id);
-               }
-
-               $dom = $basedom->children(NAMESPACE_SALMON_ME);
-
-               // figure out where in the DOM tree our data is hiding
-
-               if($dom->provenance->data)
-                       $base = $dom->provenance;
-               elseif($dom->env->data)
-                       $base = $dom->env;
-               elseif($dom->data)
-                       $base = $dom;
-
-               if (!$base) {
-                       logger('unable to locate salmon data in xml');
-                       http_status_exit(400);
-               }
-
-
-               // Stash the signature away for now. We have to find their key or it won't be good for anything.
-               $signature = base64url_decode($base->sig);
-
-               // unpack the  data
-
-               // strip whitespace so our data element will return to one big base64 blob
-               $data = str_replace(array(" ","\t","\r","\n"),array("","","",""),$base->data);
-
-
-               // stash away some other stuff for later
-
-               $type = $base->data[0]->attributes()->type[0];
-               $keyhash = $base->sig[0]->attributes()->keyhash[0];
-               $encoding = $base->encoding;
-               $alg = $base->alg;
-
-
-               $signed_data = $data.'.'.base64url_encode($type).'.'.base64url_encode($encoding).'.'.base64url_encode($alg);
-
-
-               // decode the data
-               $data = base64url_decode($data);
-
-
-               if($public)
-                       $inner_decrypted = $data;
-               else {
-
-                       // Decode the encrypted blob
-
-                       $inner_encrypted = base64_decode($data);
-                       $inner_decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $inner_encrypted, MCRYPT_MODE_CBC, $inner_iv);
-                       $inner_decrypted = pkcs5_unpad($inner_decrypted);
-               }
-
-               if (!$author_link) {
-                       logger('Could not retrieve author URI.');
-                       http_status_exit(400);
-               }
-               // Once we have the author URI, go to the web and try to find their public key
-               // (first this will look it up locally if it is in the fcontact cache)
-               // This will also convert diaspora public key from pkcs#1 to pkcs#8
-
-               logger('Fetching key for '.$author_link);
-               $key = self::key($author_link);
-
-               if (!$key) {
-                       logger('Could not retrieve author key.');
-                       http_status_exit(400);
-               }
-
-               $verify = rsa_verify($signed_data,$signature,$key);
-
-               if (!$verify) {
-                       logger('Message did not verify. Discarding.');
-                       http_status_exit(400);
-               }
-
-               logger('Message verified.');
-
-               return array('message' => $inner_decrypted, 'author' => $author_link, 'key' => $key);
-
-       }
-
-
-       /**
-        * @brief Dispatches public messages and find the fitting receivers
-        *
-        * @param array $msg The post that will be dispatched
-        *
-        * @return bool Was the message accepted?
-        */
-       public static function dispatch_public($msg) {
-
-               $enabled = intval(get_config("system", "diaspora_enabled"));
-               if (!$enabled) {
-                       logger("diaspora is disabled");
-                       return false;
-               }
-
-               // Use a dummy importer to import the data for the public copy
-               $importer = array("uid" => 0, "page-flags" => PAGE_FREELOVE);
-               $item_id = self::dispatch($importer,$msg);
-
-               // Now distribute it to the followers
-               $r = q("SELECT `user`.* FROM `user` WHERE `user`.`uid` IN
-                       (SELECT `contact`.`uid` FROM `contact` WHERE `contact`.`network` = '%s' AND `contact`.`addr` = '%s')
-                       AND NOT `account_expired` AND NOT `account_removed`",
-                       dbesc(NETWORK_DIASPORA),
-                       dbesc($msg["author"])
-               );
-               if($r) {
-                       foreach($r as $rr) {
-                               logger("delivering to: ".$rr["username"]);
-                               self::dispatch($rr,$msg);
-                       }
-               } else
-                       logger("No subscribers for ".$msg["author"]." ".print_r($msg, true));
-
-               return $item_id;
-       }
-
-       /**
-        * @brief Dispatches the different message types to the different functions
-        *
-        * @param array $importer Array of the importer user
-        * @param array $msg The post that will be dispatched
-        *
-        * @return bool Was the message accepted?
-        */
-       public static function dispatch($importer, $msg) {
-
-               // The sender is the handle of the contact that sent the message.
-               // This will often be different with relayed messages (for example "like" and "comment")
-               $sender = $msg["author"];
-
-               if (!diaspora::valid_posting($msg, $fields)) {
-                       logger("Invalid posting");
-                       return false;
-               }
-
-               $type = $fields->getName();
-
-               logger("Received message type ".$type." from ".$sender." for user ".$importer["uid"], LOGGER_DEBUG);
-
-               switch ($type) {
-                       case "account_deletion":
-                               return self::receive_account_deletion($importer, $fields);
-
-                       case "comment":
-                               return self::receive_comment($importer, $sender, $fields);
-
-                       case "conversation":
-                               return self::receive_conversation($importer, $msg, $fields);
-
-                       case "like":
-                               return self::receive_like($importer, $sender, $fields);
-
-                       case "message":
-                               return self::receive_message($importer, $fields);
-
-                       case "participation": // Not implemented
-                               return self::receive_participation($importer, $fields);
-
-                       case "photo": // Not implemented
-                               return self::receive_photo($importer, $fields);
-
-                       case "poll_participation": // Not implemented
-                               return self::receive_poll_participation($importer, $fields);
-
-                       case "profile":
-                               return self::receive_profile($importer, $fields);
-
-                       case "request":
-                               return self::receive_request($importer, $fields);
-
-                       case "reshare":
-                               return self::receive_reshare($importer, $fields);
-
-                       case "retraction":
-                               return self::receive_retraction($importer, $sender, $fields);
-
-                       case "status_message":
-                               return self::receive_status_message($importer, $fields);
-
-                       default:
-                               logger("Unknown message type ".$type);
-                               return false;
-               }
-
-               return true;
-       }
-
-       /**
-        * @brief Checks if a posting is valid and fetches the data fields.
-        *
-        * This function does not only check the signature.
-        * It also does the conversion between the old and the new diaspora format.
-        *
-        * @param array $msg Array with the XML, the sender handle and the sender signature
-        * @param object $fields SimpleXML object that contains the posting when it is valid
-        *
-        * @return bool Is the posting valid?
-        */
-       private function valid_posting($msg, &$fields) {
-
-               $data = parse_xml_string($msg["message"], false);
-
-               if (!is_object($data))
-                       return false;
-
-               $first_child = $data->getName();
-
-               // Is this the new or the old version?
-               if ($data->getName() == "XML") {
-                       $oldXML = true;
-                       foreach ($data->post->children() as $child)
-                               $element = $child;
-               } else {
-                       $oldXML = false;
-                       $element = $data;
-               }
-
-               $type = $element->getName();
-               $orig_type = $type;
-
-               // All retractions are handled identically from now on.
-               // In the new version there will only be "retraction".
-               if (in_array($type, array("signed_retraction", "relayable_retraction")))
-                       $type = "retraction";
-
-               $fields = new SimpleXMLElement("<".$type."/>");
-
-               $signed_data = "";
-
-               foreach ($element->children() AS $fieldname => $entry) {
-                       if ($oldXML) {
-                               // Translation for the old XML structure
-                               if ($fieldname == "diaspora_handle")
-                                       $fieldname = "author";
-
-                               if ($fieldname == "participant_handles")
-                                       $fieldname = "participants";
-
-                               if (in_array($type, array("like", "participation"))) {
-                                       if ($fieldname == "target_type")
-                                               $fieldname = "parent_type";
-                               }
-
-                               if ($fieldname == "sender_handle")
-                                       $fieldname = "author";
-
-                               if ($fieldname == "recipient_handle")
-                                       $fieldname = "recipient";
-
-                               if ($fieldname == "root_diaspora_id")
-                                       $fieldname = "root_author";
-
-                               if ($type == "retraction") {
-                                       if ($fieldname == "post_guid")
-                                               $fieldname = "target_guid";
-
-                                       if ($fieldname == "type")
-                                               $fieldname = "target_type";
-                               }
-                       }
-
-                       if ($fieldname == "author_signature")
-                               $author_signature = base64_decode($entry);
-                       elseif ($fieldname == "parent_author_signature")
-                               $parent_author_signature = base64_decode($entry);
-                       elseif ($fieldname != "target_author_signature") {
-                               if ($signed_data != "") {
-                                       $signed_data .= ";";
-                                       $signed_data_parent .= ";";
-                               }
-
-                               $signed_data .= $entry;
-                       }
-                       if (!in_array($fieldname, array("parent_author_signature", "target_author_signature")) OR
-                               ($orig_type == "relayable_retraction"))
-                               xml::copy($entry, $fields, $fieldname);
-               }
-
-               // This is something that shouldn't happen at all.
-               if (in_array($type, array("status_message", "reshare", "profile")))
-                       if ($msg["author"] != $fields->author) {
-                               logger("Message handle is not the same as envelope sender. Quitting this message.");
-                               return false;
-                       }
-
-               // Only some message types have signatures. So we quit here for the other types.
-               if (!in_array($type, array("comment", "message", "like")))
-                       return true;
-
-               // No author_signature? This is a must, so we quit.
-               if (!isset($author_signature))
-                       return false;
-
-               if (isset($parent_author_signature)) {
-                       $key = self::key($msg["author"]);
-
-                       if (!rsa_verify($signed_data, $parent_author_signature, $key, "sha256"))
-                               return false;
-               }
-
-               $key = self::key($fields->author);
-
-               return rsa_verify($signed_data, $author_signature, $key, "sha256");
-       }
-
-       /**
-        * @brief Fetches the public key for a given handle
-        *
-        * @param string $handle The handle
-        *
-        * @return string The public key
-        */
-       private function key($handle) {
-               $handle = strval($handle);
-
-               logger("Fetching diaspora key for: ".$handle);
-
-               $r = self::person_by_handle($handle);
-               if($r)
-                       return $r["pubkey"];
-
-               return "";
-       }
-
-       /**
-        * @brief Fetches data for a given handle
-        *
-        * @param string $handle The handle
-        *
-        * @return array the queried data
-        */
-       private function person_by_handle($handle) {
-
-               $r = q("SELECT * FROM `fcontact` WHERE `network` = '%s' AND `addr` = '%s' LIMIT 1",
-                       dbesc(NETWORK_DIASPORA),
-                       dbesc($handle)
-               );
-               if ($r) {
-                       $person = $r[0];
-                       logger("In cache ".print_r($r,true), LOGGER_DEBUG);
-
-                       // update record occasionally so it doesn't get stale
-                       $d = strtotime($person["updated"]." +00:00");
-                       if ($d < strtotime("now - 14 days"))
-                               $update = true;
-               }
-
-               if (!$person OR $update) {
-                       logger("create or refresh", LOGGER_DEBUG);
-                       $r = probe_url($handle, PROBE_DIASPORA);
-
-                       // Note that Friendica contacts will return a "Diaspora person"
-                       // if Diaspora connectivity is enabled on their server
-                       if ($r AND ($r["network"] === NETWORK_DIASPORA)) {
-                               self::add_fcontact($r, $update);
-                               $person = $r;
-                       }
-               }
-               return $person;
-       }
-
-       /**
-        * @brief Updates the fcontact table
-        *
-        * @param array $arr The fcontact data
-        * @param bool $update Update or insert?
-        *
-        * @return string The id of the fcontact entry
-        */
-       private function add_fcontact($arr, $update = false) {
-               /// @todo Remove this function from include/network.php
-
-               if($update) {
-                       $r = q("UPDATE `fcontact` SET
-                                       `name` = '%s',
-                                       `photo` = '%s',
-                                       `request` = '%s',
-                                       `nick` = '%s',
-                                       `addr` = '%s',
-                                       `batch` = '%s',
-                                       `notify` = '%s',
-                                       `poll` = '%s',
-                                       `confirm` = '%s',
-                                       `alias` = '%s',
-                                       `pubkey` = '%s',
-                                       `updated` = '%s'
-                               WHERE `url` = '%s' AND `network` = '%s'",
-                                       dbesc($arr["name"]),
-                                       dbesc($arr["photo"]),
-                                       dbesc($arr["request"]),
-                                       dbesc($arr["nick"]),
-                                       dbesc($arr["addr"]),
-                                       dbesc($arr["batch"]),
-                                       dbesc($arr["notify"]),
-                                       dbesc($arr["poll"]),
-                                       dbesc($arr["confirm"]),
-                                       dbesc($arr["alias"]),
-                                       dbesc($arr["pubkey"]),
-                                       dbesc(datetime_convert()),
-                                       dbesc($arr["url"]),
-                                       dbesc($arr["network"])
-                               );
-               } else {
-                       $r = q("INSERT INTO `fcontact` (`url`,`name`,`photo`,`request`,`nick`,`addr`,
-                                       `batch`, `notify`,`poll`,`confirm`,`network`,`alias`,`pubkey`,`updated`)
-                               VALUES ('%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s','%s')",
-                                       dbesc($arr["url"]),
-                                       dbesc($arr["name"]),
-                                       dbesc($arr["photo"]),
-                                       dbesc($arr["request"]),
-                                       dbesc($arr["nick"]),
-                                       dbesc($arr["addr"]),
-                                       dbesc($arr["batch"]),
-                                       dbesc($arr["notify"]),
-                                       dbesc($arr["poll"]),
-                                       dbesc($arr["confirm"]),
-                                       dbesc($arr["network"]),
-                                       dbesc($arr["alias"]),
-                                       dbesc($arr["pubkey"]),
-                                       dbesc(datetime_convert())
-                               );
-               }
-
-               return $r;
-       }
-
-       public static function handle_from_contact($contact_id) {
-               $handle = False;
-
-               logger("contact id is ".$contact_id, LOGGER_DEBUG);
-
-               $r = q("SELECT `network`, `addr`, `self`, `url`, `nick` FROM `contact` WHERE `id` = %d",
-                      intval($contact_id)
-               );
-               if($r) {
-                       $contact = $r[0];
-
-                       logger("contact 'self' = ".$contact['self']." 'url' = ".$contact['url'], LOGGER_DEBUG);
-
-                       if($contact['addr'] != "")
-                               $handle = $contact['addr'];
-                       elseif(($contact['network'] === NETWORK_DFRN) || ($contact['self'] == 1)) {
-                               $baseurl_start = strpos($contact['url'],'://') + 3;
-                               $baseurl_length = strpos($contact['url'],'/profile') - $baseurl_start; // allows installations in a subdirectory--not sure how Diaspora will handle
-                               $baseurl = substr($contact['url'], $baseurl_start, $baseurl_length);
-                               $handle = $contact['nick'].'@'.$baseurl;
-                       }
-               }
-
-               return $handle;
-       }
-
-       private function contact_by_handle($uid, $handle) {
-               $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `addr` = '%s' LIMIT 1",
-                       intval($uid),
-                       dbesc($handle)
-               );
-
-               if ($r)
-                       return $r[0];
-
-               $handle_parts = explode("@", $handle);
-               $nurl_sql = "%%://".$handle_parts[1]."%%/profile/".$handle_parts[0];
-               $r = q("SELECT * FROM `contact` WHERE `network` = '%s' AND `uid` = %d AND `nurl` LIKE '%s' LIMIT 1",
-                       dbesc(NETWORK_DFRN),
-                       intval($uid),
-                       dbesc($nurl_sql)
-               );
-               if($r)
-                       return $r[0];
-
-               return false;
-       }
-
-       private function post_allow($importer, $contact, $is_comment = false) {
-
-               // perhaps we were already sharing with this person. Now they're sharing with us.
-               // That makes us friends.
-               // Normally this should have handled by getting a request - but this could get lost
-               if($contact["rel"] == CONTACT_IS_FOLLOWER && in_array($importer["page-flags"], array(PAGE_FREELOVE))) {
-                       q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d",
-                               intval(CONTACT_IS_FRIEND),
-                               intval($contact["id"]),
-                               intval($importer["uid"])
-                       );
-                       $contact["rel"] = CONTACT_IS_FRIEND;
-                       logger("defining user ".$contact["nick"]." as friend");
-               }
-
-               if(($contact["blocked"]) || ($contact["readonly"]) || ($contact["archive"]))
-                       return false;
-               if($contact["rel"] == CONTACT_IS_SHARING || $contact["rel"] == CONTACT_IS_FRIEND)
-                       return true;
-               if($contact["rel"] == CONTACT_IS_FOLLOWER)
-                       if(($importer["page-flags"] == PAGE_COMMUNITY) OR $is_comment)
-                               return true;
-
-               // Messages for the global users are always accepted
-               if ($importer["uid"] == 0)
-                       return true;
-
-               return false;
-       }
-
-       private function allowed_contact_by_handle($importer, $handle, $is_comment = false) {
-               $contact = self::contact_by_handle($importer["uid"], $handle);
-               if (!$contact) {
-                       logger("A Contact for handle ".$handle." and user ".$importer["uid"]." was not found");
-                       return false;
-               }
-
-               if (!self::post_allow($importer, $contact, $is_comment)) {
-                       logger("The handle: ".$handle." is not allowed to post to user ".$importer["uid"]);
-                       return false;
-               }
-               return $contact;
-       }
-
-       private function message_exists($uid, $guid) {
-               $r = q("SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-                       intval($uid),
-                       dbesc($guid)
-               );
-
-               if($r) {
-                       logger("message ".$guid." already exists for user ".$uid);
-                       return true;
-               }
-
-               return false;
-       }
-
-       private function fetch_guid($item) {
-               preg_replace_callback("&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
-                       function ($match) use ($item){
-                               return(self::fetch_guid_sub($match, $item));
-                       },$item["body"]);
-       }
-
-       private function fetch_guid_sub($match, $item) {
-               if (!self::store_by_guid($match[1], $item["author-link"]))
-                       self::store_by_guid($match[1], $item["owner-link"]);
-       }
-
-       private function store_by_guid($guid, $server, $uid = 0) {
-               $serverparts = parse_url($server);
-               $server = $serverparts["scheme"]."://".$serverparts["host"];
-
-               logger("Trying to fetch item ".$guid." from ".$server, LOGGER_DEBUG);
-
-               $msg = self::message($guid, $server);
-
-               if (!$msg)
-                       return false;
-
-               logger("Successfully fetched item ".$guid." from ".$server, LOGGER_DEBUG);
-
-               // Now call the dispatcher
-               return self::dispatch_public($msg);
-       }
-
-       private function message($guid, $server, $level = 0) {
-
-               if ($level > 5)
-                       return false;
-
-               // This will work for Diaspora and newer Friendica servers
-               $source_url = $server."/p/".$guid.".xml";
-               $x = fetch_url($source_url);
-               if(!$x)
-                       return false;
-
-               $source_xml = parse_xml_string($x, false);
-
-               if (!is_object($source_xml))
-                       return false;
-
-               if ($source_xml->post->reshare) {
-                       // Reshare of a reshare - old Diaspora version
-                       return self::message($source_xml->post->reshare->root_guid, $server, ++$level);
-               } elseif ($source_xml->getName() == "reshare") {
-                       // Reshare of a reshare - new Diaspora version
-                       return self::message($source_xml->root_guid, $server, ++$level);
-               }
-
-               $author = "";
-
-               // Fetch the author - for the old and the new Diaspora version
-               if ($source_xml->post->status_message->diaspora_handle)
-                       $author = (string)$source_xml->post->status_message->diaspora_handle;
-               elseif ($source_xml->author AND ($source_xml->getName() == "status_message"))
-                       $author = (string)$source_xml->author;
-
-               // If this isn't a "status_message" then quit
-               if (!$author)
-                       return false;
-
-               $msg = array("message" => $x, "author" => $author);
-
-               $msg["key"] = self::key($msg["author"]);
-
-               return $msg;
-       }
-
-       private function parent_item($uid, $guid, $author, $contact) {
-               $r = q("SELECT `id`, `body`, `wall`, `uri`, `private`, `origin`,
-                               `author-name`, `author-link`, `author-avatar`,
-                               `owner-name`, `owner-link`, `owner-avatar`
-                       FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-                       intval($uid), dbesc($guid));
-
-               if(!$r) {
-                       $result = self::store_by_guid($guid, $contact["url"], $uid);
-
-                       if (!$result) {
-                               $person = self::person_by_handle($author);
-                               $result = self::store_by_guid($guid, $person["url"], $uid);
-                       }
-
-                       if ($result) {
-                               logger("Fetched missing item ".$guid." - result: ".$result, LOGGER_DEBUG);
-
-                               $r = q("SELECT `id`, `body`, `wall`, `uri`, `private`, `origin`,
-                                               `author-name`, `author-link`, `author-avatar`,
-                                               `owner-name`, `owner-link`, `owner-avatar`
-                                       FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-                                       intval($uid), dbesc($guid));
-                       }
-               }
-
-               if (!$r) {
-                       logger("parent item not found: parent: ".$guid." - user: ".$uid);
-                       return false;
-               } else {
-                       logger("parent item found: parent: ".$guid." - user: ".$uid);
-                       return $r[0];
-               }
-       }
-
-       private function author_contact_by_url($contact, $person, $uid) {
-
-               $r = q("SELECT `id`, `network` FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d LIMIT 1",
-                       dbesc(normalise_link($person["url"])), intval($uid));
-               if ($r) {
-                       $cid = $r[0]["id"];
-                       $network = $r[0]["network"];
-               } else {
-                       $cid = $contact["id"];
-                       $network = NETWORK_DIASPORA;
-               }
-
-               return (array("cid" => $cid, "network" => $network));
-       }
-
-       public static function is_redmatrix($url) {
-               return(strstr($url, "/channel/"));
-       }
-
-       private function plink($addr, $guid) {
-               $r = q("SELECT `url`, `nick`, `network` FROM `fcontact` WHERE `addr`='%s' LIMIT 1", dbesc($addr));
-
-               // Fallback
-               if (!$r)
-                       return "https://".substr($addr,strpos($addr,"@")+1)."/posts/".$guid;
-
-               // Friendica contacts are often detected as Diaspora contacts in the "fcontact" table
-               // So we try another way as well.
-               $s = q("SELECT `network` FROM `gcontact` WHERE `nurl`='%s' LIMIT 1", dbesc(normalise_link($r[0]["url"])));
-               if ($s)
-                       $r[0]["network"] = $s[0]["network"];
-
-               if ($r[0]["network"] == NETWORK_DFRN)
-                       return(str_replace("/profile/".$r[0]["nick"]."/", "/display/".$guid, $r[0]["url"]."/"));
-
-               if (self::is_redmatrix($r[0]["url"]))
-                       return $r[0]["url"]."/?f=&mid=".$guid;
-
-               return "https://".substr($addr,strpos($addr,"@")+1)."/posts/".$guid;
-       }
-
-       private function receive_account_deletion($importer, $data) {
-               $author = notags(unxmlify($data->author));
-
-               $contact = self::contact_by_handle($importer["uid"], $author);
-               if (!$contact) {
-                       logger("cannot find contact for author: ".$author);
-                       return false;
-               }
-
-               // We now remove the contact
-               contact_remove($contact["id"]);
-               return true;
-       }
-
-       private function receive_comment($importer, $sender, $data) {
-               $guid = notags(unxmlify($data->guid));
-               $parent_guid = notags(unxmlify($data->parent_guid));
-               $text = unxmlify($data->text);
-               $author = notags(unxmlify($data->author));
-
-               $contact = self::allowed_contact_by_handle($importer, $sender, true);
-               if (!$contact)
-                       return false;
-
-               if (self::message_exists($importer["uid"], $guid))
-                       return false;
-
-               $parent_item = self::parent_item($importer["uid"], $parent_guid, $author, $contact);
-               if (!$parent_item)
-                       return false;
-
-               $person = self::person_by_handle($author);
-               if (!is_array($person)) {
-                       logger("unable to find author details");
-                       return false;
-               }
-
-               // Fetch the contact id - if we know this contact
-               $author_contact = self::author_contact_by_url($contact, $person, $importer["uid"]);
-
-               $datarray = array();
-
-               $datarray["uid"] = $importer["uid"];
-               $datarray["contact-id"] = $author_contact["cid"];
-               $datarray["network"]  = $author_contact["network"];
-
-               $datarray["author-name"] = $person["name"];
-               $datarray["author-link"] = $person["url"];
-               $datarray["author-avatar"] = ((x($person,"thumb")) ? $person["thumb"] : $person["photo"]);
-
-               $datarray["owner-name"] = $contact["name"];
-               $datarray["owner-link"] = $contact["url"];
-               $datarray["owner-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
-
-               $datarray["guid"] = $guid;
-               $datarray["uri"] = $author.":".$guid;
-
-               $datarray["type"] = "remote-comment";
-               $datarray["verb"] = ACTIVITY_POST;
-               $datarray["gravity"] = GRAVITY_COMMENT;
-               $datarray["parent-uri"] = $parent_item["uri"];
-
-               $datarray["object-type"] = ACTIVITY_OBJ_COMMENT;
-               $datarray["object"] = json_encode($data);
-
-               $datarray["body"] = diaspora2bb($text);
-
-               self::fetch_guid($datarray);
-
-               $message_id = item_store($datarray);
-
-               if ($message_id)
-                       logger("Stored comment ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
-
-               // If we are the origin of the parent we store the original data and notify our followers
-               if($message_id AND $parent_item["origin"]) {
-
-                       // Formerly we stored the signed text, the signature and the author in different fields.
-                       // We now store the raw data so that we are more flexible.
-                       q("INSERT INTO `sign` (`iid`,`signed_text`) VALUES (%d,'%s')",
-                               intval($message_id),
-                               dbesc(json_encode($data))
-                       );
-
-                       // notify others
-                       proc_run("php", "include/notifier.php", "comment-import", $message_id);
-               }
-
-               return $message_id;
-       }
-
-       private function receive_conversation_message($importer, $contact, $data, $msg, $mesg, $conversation) {
-               $guid = notags(unxmlify($data->guid));
-               $subject = notags(unxmlify($data->subject));
-               $author = notags(unxmlify($data->author));
-
-               $reply = 0;
-
-               $msg_guid = notags(unxmlify($mesg->guid));
-               $msg_parent_guid = notags(unxmlify($mesg->parent_guid));
-               $msg_parent_author_signature = notags(unxmlify($mesg->parent_author_signature));
-               $msg_author_signature = notags(unxmlify($mesg->author_signature));
-               $msg_text = unxmlify($mesg->text);
-               $msg_created_at = datetime_convert("UTC", "UTC", notags(unxmlify($mesg->created_at)));
-
-               // "diaspora_handle" is the element name from the old version
-               // "author" is the element name from the new version
-               if ($mesg->author)
-                       $msg_author = notags(unxmlify($mesg->author));
-               elseif ($mesg->diaspora_handle)
-                       $msg_author = notags(unxmlify($mesg->diaspora_handle));
-               else
-                       return false;
-
-               $msg_conversation_guid = notags(unxmlify($mesg->conversation_guid));
-
-               if($msg_conversation_guid != $guid) {
-                       logger("message conversation guid does not belong to the current conversation.");
-                       return false;
-               }
-
-               $body = diaspora2bb($msg_text);
-               $message_uri = $msg_author.":".$msg_guid;
-
-               $author_signed_data = $msg_guid.";".$msg_parent_guid.";".$msg_text.";".unxmlify($mesg->created_at).";".$msg_author.";".$msg_conversation_guid;
-
-               $author_signature = base64_decode($msg_author_signature);
-
-               if(strcasecmp($msg_author,$msg["author"]) == 0) {
-                       $person = $contact;
-                       $key = $msg["key"];
-               } else {
-                       $person = self::person_by_handle($msg_author);
-
-                       if (is_array($person) && x($person, "pubkey"))
-                               $key = $person["pubkey"];
-                       else {
-                               logger("unable to find author details");
-                                       return false;
-                       }
-               }
-
-               if (!rsa_verify($author_signed_data, $author_signature, $key, "sha256")) {
-                       logger("verification failed.");
-                       return false;
-               }
-
-               if($msg_parent_author_signature) {
-                       $owner_signed_data = $msg_guid.";".$msg_parent_guid.";".$msg_text.";".unxmlify($mesg->created_at).";".$msg_author.";".$msg_conversation_guid;
-
-                       $parent_author_signature = base64_decode($msg_parent_author_signature);
-
-                       $key = $msg["key"];
-
-                       if (!rsa_verify($owner_signed_data, $parent_author_signature, $key, "sha256")) {
-                               logger("owner verification failed.");
-                               return false;
-                       }
-               }
-
-               $r = q("SELECT `id` FROM `mail` WHERE `uri` = '%s' LIMIT 1",
-                       dbesc($message_uri)
-               );
-               if($r) {
-                       logger("duplicate message already delivered.", LOGGER_DEBUG);
-                       return false;
-               }
-
-               q("INSERT INTO `mail` (`uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`)
-                       VALUES (%d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
-                       intval($importer["uid"]),
-                       dbesc($msg_guid),
-                       intval($conversation["id"]),
-                       dbesc($person["name"]),
-                       dbesc($person["photo"]),
-                       dbesc($person["url"]),
-                       intval($contact["id"]),
-                       dbesc($subject),
-                       dbesc($body),
-                       0,
-                       0,
-                       dbesc($message_uri),
-                       dbesc($author.":".$guid),
-                       dbesc($msg_created_at)
-               );
-
-               q("UPDATE `conv` SET `updated` = '%s' WHERE `id` = %d",
-                       dbesc(datetime_convert()),
-                       intval($conversation["id"])
-               );
-
-               notification(array(
-                       "type" => NOTIFY_MAIL,
-                       "notify_flags" => $importer["notify-flags"],
-                       "language" => $importer["language"],
-                       "to_name" => $importer["username"],
-                       "to_email" => $importer["email"],
-                       "uid" =>$importer["uid"],
-                       "item" => array("subject" => $subject, "body" => $body),
-                       "source_name" => $person["name"],
-                       "source_link" => $person["url"],
-                       "source_photo" => $person["thumb"],
-                       "verb" => ACTIVITY_POST,
-                       "otype" => "mail"
-               ));
-       }
-
-       private function receive_conversation($importer, $msg, $data) {
-               $guid = notags(unxmlify($data->guid));
-               $subject = notags(unxmlify($data->subject));
-               $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
-               $author = notags(unxmlify($data->author));
-               $participants = notags(unxmlify($data->participants));
-
-               $messages = $data->message;
-
-               if (!count($messages)) {
-                       logger("empty conversation");
-                       return false;
-               }
-
-               $contact = self::allowed_contact_by_handle($importer, $msg["author"], true);
-               if (!$contact)
-                       return false;
-
-               $conversation = null;
-
-               $c = q("SELECT * FROM `conv` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-                       intval($importer["uid"]),
-                       dbesc($guid)
-               );
-               if($c)
-                       $conversation = $c[0];
-               else {
-                       $r = q("INSERT INTO `conv` (`uid`, `guid`, `creator`, `created`, `updated`, `subject`, `recips`)
-                               VALUES (%d, '%s', '%s', '%s', '%s', '%s', '%s')",
-                               intval($importer["uid"]),
-                               dbesc($guid),
-                               dbesc($author),
-                               dbesc(datetime_convert("UTC", "UTC", $created_at)),
-                               dbesc(datetime_convert()),
-                               dbesc($subject),
-                               dbesc($participants)
-                       );
-                       if($r)
-                               $c = q("SELECT * FROM `conv` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-                                       intval($importer["uid"]),
-                                       dbesc($guid)
-                               );
-
-                       if($c)
-                               $conversation = $c[0];
-               }
-               if (!$conversation) {
-                       logger("unable to create conversation.");
-                       return;
-               }
-
-               foreach($messages as $mesg)
-                       self::receive_conversation_message($importer, $contact, $data, $msg, $mesg, $conversation);
-
-               return true;
-       }
-
-       private function construct_like_body($contact, $parent_item, $guid) {
-               $bodyverb = t('%1$s likes %2$s\'s %3$s');
-
-               $ulink = "[url=".$contact["url"]."]".$contact["name"]."[/url]";
-               $alink = "[url=".$parent_item["author-link"]."]".$parent_item["author-name"]."[/url]";
-               $plink = "[url=".App::get_baseurl()."/display/".urlencode($guid)."]".t("status")."[/url]";
-
-               return sprintf($bodyverb, $ulink, $alink, $plink);
-       }
-
-       private function construct_like_object($importer, $parent_item) {
-               $objtype = ACTIVITY_OBJ_NOTE;
-               $link = '<link rel="alternate" type="text/html" href="'.App::get_baseurl()."/display/".$importer["nickname"]."/".$parent_item["id"].'" />';
-               $parent_body = $parent_item["body"];
-
-               $xmldata = array("object" => array("type" => $objtype,
-                                               "local" => "1",
-                                               "id" => $parent_item["uri"],
-                                               "link" => $link,
-                                               "title" => "",
-                                               "content" => $parent_body));
-
-               return xml::from_array($xmldata, $xml, true);
-       }
-
-       private function receive_like($importer, $sender, $data) {
-               $positive = notags(unxmlify($data->positive));
-               $guid = notags(unxmlify($data->guid));
-               $parent_type = notags(unxmlify($data->parent_type));
-               $parent_guid = notags(unxmlify($data->parent_guid));
-               $author = notags(unxmlify($data->author));
-
-               // likes on comments aren't supported by Diaspora - only on posts
-               // But maybe this will be supported in the future, so we will accept it.
-               if (!in_array($parent_type, array("Post", "Comment")))
-                       return false;
-
-               $contact = self::allowed_contact_by_handle($importer, $sender, true);
-               if (!$contact)
-                       return false;
-
-               if (self::message_exists($importer["uid"], $guid))
-                       return false;
-
-               $parent_item = self::parent_item($importer["uid"], $parent_guid, $author, $contact);
-               if (!$parent_item)
-                       return false;
-
-               $person = self::person_by_handle($author);
-               if (!is_array($person)) {
-                       logger("unable to find author details");
-                       return false;
-               }
-
-               // Fetch the contact id - if we know this contact
-               $author_contact = self::author_contact_by_url($contact, $person, $importer["uid"]);
-
-               // "positive" = "false" would be a Dislike - wich isn't currently supported by Diaspora
-               // We would accept this anyhow.
-               if ($positive === "true")
-                       $verb = ACTIVITY_LIKE;
-               else
-                       $verb = ACTIVITY_DISLIKE;
-
-               $datarray = array();
-
-               $datarray["uid"] = $importer["uid"];
-               $datarray["contact-id"] = $author_contact["cid"];
-               $datarray["network"]  = $author_contact["network"];
-
-               $datarray["author-name"] = $person["name"];
-               $datarray["author-link"] = $person["url"];
-               $datarray["author-avatar"] = ((x($person,"thumb")) ? $person["thumb"] : $person["photo"]);
-
-               $datarray["owner-name"] = $contact["name"];
-               $datarray["owner-link"] = $contact["url"];
-               $datarray["owner-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
-
-               $datarray["guid"] = $guid;
-               $datarray["uri"] = $author.":".$guid;
-
-               $datarray["type"] = "activity";
-               $datarray["verb"] = $verb;
-               $datarray["gravity"] = GRAVITY_LIKE;
-               $datarray["parent-uri"] = $parent_item["uri"];
-
-               $datarray["object-type"] = ACTIVITY_OBJ_NOTE;
-               $datarray["object"] = self::construct_like_object($importer, $parent_item);
-
-               $datarray["body"] = self::construct_like_body($contact, $parent_item, $guid);
-
-               $message_id = item_store($datarray);
-
-               if ($message_id)
-                       logger("Stored like ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
-
-               // If we are the origin of the parent we store the original data and notify our followers
-               if($message_id AND $parent_item["origin"]) {
-
-                       // Formerly we stored the signed text, the signature and the author in different fields.
-                       // We now store the raw data so that we are more flexible.
-                       q("INSERT INTO `sign` (`iid`,`signed_text`) VALUES (%d,'%s')",
-                               intval($message_id),
-                               dbesc(json_encode($data))
-                       );
-
-                       // notify others
-                       proc_run("php", "include/notifier.php", "comment-import", $message_id);
-               }
-
-               return $message_id;
-       }
-
-       private function receive_message($importer, $data) {
-               $guid = notags(unxmlify($data->guid));
-               $parent_guid = notags(unxmlify($data->parent_guid));
-               $text = unxmlify($data->text);
-               $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
-               $author = notags(unxmlify($data->author));
-               $conversation_guid = notags(unxmlify($data->conversation_guid));
-
-               $contact = self::allowed_contact_by_handle($importer, $author, true);
-               if (!$contact)
-                       return false;
-
-               $conversation = null;
-
-               $c = q("SELECT * FROM `conv` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
-                       intval($importer["uid"]),
-                       dbesc($conversation_guid)
-               );
-               if($c)
-                       $conversation = $c[0];
-               else {
-                       logger("conversation not available.");
-                       return false;
-               }
-
-               $reply = 0;
-
-               $body = diaspora2bb($text);
-               $message_uri = $author.":".$guid;
-
-               $person = self::person_by_handle($author);
-               if (!$person) {
-                       logger("unable to find author details");
-                       return false;
-               }
-
-               $r = q("SELECT `id` FROM `mail` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
-                       dbesc($message_uri),
-                       intval($importer["uid"])
-               );
-               if($r) {
-                       logger("duplicate message already delivered.", LOGGER_DEBUG);
-                       return false;
-               }
-
-               q("INSERT INTO `mail` (`uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`)
-                               VALUES ( %d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
-                       intval($importer["uid"]),
-                       dbesc($guid),
-                       intval($conversation["id"]),
-                       dbesc($person["name"]),
-                       dbesc($person["photo"]),
-                       dbesc($person["url"]),
-                       intval($contact["id"]),
-                       dbesc($conversation["subject"]),
-                       dbesc($body),
-                       0,
-                       1,
-                       dbesc($message_uri),
-                       dbesc($author.":".$parent_guid),
-                       dbesc($created_at)
-               );
-
-               q("UPDATE `conv` SET `updated` = '%s' WHERE `id` = %d",
-                       dbesc(datetime_convert()),
-                       intval($conversation["id"])
-               );
-
-               return true;
-       }
-
-       private function receive_participation($importer, $data) {
-               // I'm not sure if we can fully support this message type
-               return true;
-       }
-
-       private function receive_photo($importer, $data) {
-               // There doesn't seem to be a reason for this function, since the photo data is transmitted in the status message as well
-               return true;
-       }
-
-       private function receive_poll_participation($importer, $data) {
-               // We don't support polls by now
-               return true;
-       }
-
-       private function receive_profile($importer, $data) {
-               $author = notags(unxmlify($data->author));
-
-               $contact = self::contact_by_handle($importer["uid"], $author);
-               if (!$contact)
-                       return;
-
-               $name = unxmlify($data->first_name).((strlen($data->last_name)) ? " ".unxmlify($data->last_name) : "");
-               $image_url = unxmlify($data->image_url);
-               $birthday = unxmlify($data->birthday);
-               $location = diaspora2bb(unxmlify($data->location));
-               $about = diaspora2bb(unxmlify($data->bio));
-               $gender = unxmlify($data->gender);
-               $searchable = (unxmlify($data->searchable) == "true");
-               $nsfw = (unxmlify($data->nsfw) == "true");
-               $tags = unxmlify($data->tag_string);
-
-               $tags = explode("#", $tags);
-
-               $keywords = array();
-               foreach ($tags as $tag) {
-                       $tag = trim(strtolower($tag));
-                       if ($tag != "")
-                               $keywords[] = $tag;
-               }
-
-               $keywords = implode(", ", $keywords);
-
-               $handle_parts = explode("@", $author);
-               $nick = $handle_parts[0];
-
-               if($name === "")
-                       $name = $handle_parts[0];
-
-               if( preg_match("|^https?://|", $image_url) === 0)
-                       $image_url = "http://".$handle_parts[1].$image_url;
-
-               update_contact_avatar($image_url, $importer["uid"], $contact["id"]);
-
-               // Generic birthday. We don't know the timezone. The year is irrelevant.
-
-               $birthday = str_replace("1000", "1901", $birthday);
-
-               if ($birthday != "")
-                       $birthday = datetime_convert("UTC", "UTC", $birthday, "Y-m-d");
-
-               // this is to prevent multiple birthday notifications in a single year
-               // if we already have a stored birthday and the 'm-d' part hasn't changed, preserve the entry, which will preserve the notify year
-
-               if(substr($birthday,5) === substr($contact["bd"],5))
-                       $birthday = $contact["bd"];
-
-               $r = q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `addr` = '%s', `name-date` = '%s', `bd` = '%s',
-                               `location` = '%s', `about` = '%s', `keywords` = '%s', `gender` = '%s' WHERE `id` = %d AND `uid` = %d",
-                       dbesc($name),
-                       dbesc($nick),
-                       dbesc($author),
-                       dbesc(datetime_convert()),
-                       dbesc($birthday),
-                       dbesc($location),
-                       dbesc($about),
-                       dbesc($keywords),
-                       dbesc($gender),
-                       intval($contact["id"]),
-                       intval($importer["uid"])
-               );
-
-               if ($searchable) {
-                       poco_check($contact["url"], $name, NETWORK_DIASPORA, $image_url, $about, $location, $gender, $keywords, "",
-                               datetime_convert(), 2, $contact["id"], $importer["uid"]);
-               }
-
-               $gcontact = array("url" => $contact["url"], "network" => NETWORK_DIASPORA, "generation" => 2,
-                                       "photo" => $image_url, "name" => $name, "location" => $location,
-                                       "about" => $about, "birthday" => $birthday, "gender" => $gender,
-                                       "addr" => $author, "nick" => $nick, "keywords" => $keywords,
-                                       "hide" => !$searchable, "nsfw" => $nsfw);
-
-               update_gcontact($gcontact);
-
-               logger("Profile of contact ".$contact["id"]." stored for user ".$importer["uid"], LOGGER_DEBUG);
-
-               return true;
-       }
-
-       private function receive_request_make_friend($importer, $contact) {
-
-               $a = get_app();
-
-               if($contact["rel"] == CONTACT_IS_FOLLOWER && in_array($importer["page-flags"], array(PAGE_FREELOVE))) {
-                       q("UPDATE `contact` SET `rel` = %d, `writable` = 1 WHERE `id` = %d AND `uid` = %d",
-                               intval(CONTACT_IS_FRIEND),
-                               intval($contact["id"]),
-                               intval($importer["uid"])
-                       );
-               }
-               // send notification
-
-               $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
-                       intval($importer["uid"])
-               );
-
-               if($r && !$r[0]["hide-friends"] && !$contact["hidden"] && intval(get_pconfig($importer["uid"], "system", "post_newfriend"))) {
-
-                       $self = q("SELECT * FROM `contact` WHERE `self` AND `uid` = %d LIMIT 1",
-                               intval($importer["uid"])
-                       );
-
-                       // they are not CONTACT_IS_FOLLOWER anymore but that's what we have in the array
-
-                       if($self && $contact["rel"] == CONTACT_IS_FOLLOWER) {
-
-                               $arr = array();
-                               $arr["uri"] = $arr["parent-uri"] = item_new_uri($a->get_hostname(), $importer["uid"]);
-                               $arr["uid"] = $importer["uid"];
-                               $arr["contact-id"] = $self[0]["id"];
-                               $arr["wall"] = 1;
-                               $arr["type"] = 'wall';
-                               $arr["gravity"] = 0;
-                               $arr["origin"] = 1;
-                               $arr["author-name"] = $arr["owner-name"] = $self[0]["name"];
-                               $arr["author-link"] = $arr["owner-link"] = $self[0]["url"];
-                               $arr["author-avatar"] = $arr["owner-avatar"] = $self[0]["thumb"];
-                               $arr["verb"] = ACTIVITY_FRIEND;
-                               $arr["object-type"] = ACTIVITY_OBJ_PERSON;
-
-                               $A = "[url=".$self[0]["url"]."]".$self[0]["name"]."[/url]";
-                               $B = "[url=".$contact["url"]."]".$contact["name"]."[/url]";
-                               $BPhoto = "[url=".$contact["url"]."][img]".$contact["thumb"]."[/img][/url]";
-                               $arr["body"] = sprintf(t("%1$s is now friends with %2$s"), $A, $B)."\n\n\n".$Bphoto;
-
-                               $arr["object"] = "<object><type>".ACTIVITY_OBJ_PERSON."</type><title>".$contact["name"]."</title>"
-                                       ."<id>".$contact["url"]."/".$contact["name"]."</id>";
-                               $arr["object"] .= "<link>".xmlify('<link rel="alternate" type="text/html" href="'.$contact["url"].'" />'."\n");
-                               $arr["object"] .= xmlify('<link rel="photo" type="image/jpeg" href="'.$contact["thumb"].'" />'."\n");
-                               $arr["object"] .= "</link></object>\n";
-                               $arr["last-child"] = 1;
-
-                               $arr["allow_cid"] = $user[0]["allow_cid"];
-                               $arr["allow_gid"] = $user[0]["allow_gid"];
-                               $arr["deny_cid"]  = $user[0]["deny_cid"];
-                               $arr["deny_gid"]  = $user[0]["deny_gid"];
-
-                               $i = item_store($arr);
-                               if($i)
-                                       proc_run("php", "include/notifier.php", "activity", $i);
-
-                       }
-
-               }
-       }
-
-       private function receive_request($importer, $data) {
-               $author = unxmlify($data->author);
-               $recipient = unxmlify($data->recipient);
-
-               if (!$author || !$recipient)
-                       return;
-
-               $contact = self::contact_by_handle($importer["uid"],$author);
-
-               if($contact) {
-
-                       // perhaps we were already sharing with this person. Now they're sharing with us.
-                       // That makes us friends.
-
-                       self::receive_request_make_friend($importer, $contact);
-                       return true;
-               }
-
-               $ret = self::person_by_handle($author);
-
-               if (!$ret || ($ret["network"] != NETWORK_DIASPORA)) {
-                       logger("Cannot resolve diaspora handle ".$author." for ".$recipient);
-                       return false;
-               }
-
-               $batch = (($ret["batch"]) ? $ret["batch"] : implode("/", array_slice(explode("/", $ret["url"]), 0, 3))."/receive/public");
-
-               $r = q("INSERT INTO `contact` (`uid`, `network`,`addr`,`created`,`url`,`nurl`,`batch`,`name`,`nick`,`photo`,`pubkey`,`notify`,`poll`,`blocked`,`priority`)
-                       VALUES (%d, '%s', '%s', '%s', '%s','%s','%s','%s','%s','%s','%s','%s','%s',%d,%d)",
-                       intval($importer["uid"]),
-                       dbesc($ret["network"]),
-                       dbesc($ret["addr"]),
-                       datetime_convert(),
-                       dbesc($ret["url"]),
-                       dbesc(normalise_link($ret["url"])),
-                       dbesc($batch),
-                       dbesc($ret["name"]),
-                       dbesc($ret["nick"]),
-                       dbesc($ret["photo"]),
-                       dbesc($ret["pubkey"]),
-                       dbesc($ret["notify"]),
-                       dbesc($ret["poll"]),
-                       1,
-                       2
-               );
-
-               // find the contact record we just created
-
-               $contact_record = self::contact_by_handle($importer["uid"],$author);
-
-               if (!$contact_record) {
-                       logger("unable to locate newly created contact record.");
-                       return;
-               }
-
-               $g = q("SELECT `def_gid` FROM `user` WHERE `uid` = %d LIMIT 1",
-                       intval($importer["uid"])
-               );
-
-               if($g && intval($g[0]["def_gid"]))
-                       group_add_member($importer["uid"], "", $contact_record["id"], $g[0]["def_gid"]);
-
-               if($importer["page-flags"] == PAGE_NORMAL) {
-
-                       $hash = random_string().(string)time();   // Generate a confirm_key
-
-                       $ret = q("INSERT INTO `intro` (`uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
-                               VALUES (%d, %d, %d, %d, '%s', '%s', '%s')",
-                               intval($importer["uid"]),
-                               intval($contact_record["id"]),
-                               0,
-                               0,
-                               dbesc(t("Sharing notification from Diaspora network")),
-                               dbesc($hash),
-                               dbesc(datetime_convert())
-                       );
-               } else {
-
-                       // automatic friend approval
-
-                       update_contact_avatar($contact_record["photo"],$importer["uid"],$contact_record["id"]);
-
-                       // technically they are sharing with us (CONTACT_IS_SHARING),
-                       // but if our page-type is PAGE_COMMUNITY or PAGE_SOAPBOX
-                       // we are going to change the relationship and make them a follower.
-
-                       if($importer["page-flags"] == PAGE_FREELOVE)
-                               $new_relation = CONTACT_IS_FRIEND;
-                       else
-                               $new_relation = CONTACT_IS_FOLLOWER;
-
-                       $r = q("UPDATE `contact` SET `rel` = %d,
-                               `name-date` = '%s',
-                               `uri-date` = '%s',
-                               `blocked` = 0,
-                               `pending` = 0,
-                               `writable` = 1
-                               WHERE `id` = %d
-                               ",
-                               intval($new_relation),
-                               dbesc(datetime_convert()),
-                               dbesc(datetime_convert()),
-                               intval($contact_record["id"])
-                       );
-
-                       $u = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", intval($importer["uid"]));
-                       if($u)
-                               $ret = self::send_share($u[0], $contact_record);
-               }
-
-               return true;
-       }
-
-       private function original_item($guid, $orig_author, $author) {
-
-               // Do we already have this item?
-               $r = q("SELECT `body`, `tag`, `app`, `created`, `object-type`, `uri`, `guid`,
-                               `author-name`, `author-link`, `author-avatar`
-                               FROM `item` WHERE `guid` = '%s' AND `visible` AND NOT `deleted` AND `body` != '' LIMIT 1",
-                       dbesc($guid));
-
-               if($r) {
-                       logger("reshared message ".$guid." already exists on system.");
-
-                       // Maybe it is already a reshared item?
-                       // Then refetch the content, since there can be many side effects with reshared posts from other networks or reshares from reshares
-                       if (self::is_reshare($r[0]["body"]))
-                               $r = array();
-                       else
-                               return $r[0];
-               }
-
-               if (!$r) {
-                       $server = "https://".substr($orig_author, strpos($orig_author, "@") + 1);
-                       logger("1st try: reshared message ".$guid." will be fetched from original server: ".$server);
-                       $item_id = self::store_by_guid($guid, $server);
-
-                       if (!$item_id) {
-                               $server = "http://".substr($orig_author, strpos($orig_author, "@") + 1);
-                               logger("2nd try: reshared message ".$guid." will be fetched from original server: ".$server);
-                               $item_id = self::store_by_guid($guid, $server);
-                       }
-
-                       // Deactivated by now since there is a risk that someone could manipulate postings through this method
-/*                     if (!$item_id) {
-                               $server = "https://".substr($author, strpos($author, "@") + 1);
-                               logger("3rd try: reshared message ".$guid." will be fetched from sharer's server: ".$server);
-                               $item_id = self::store_by_guid($guid, $server);
-                       }
-                       if (!$item_id) {
-                               $server = "http://".substr($author, strpos($author, "@") + 1);
-                               logger("4th try: reshared message ".$guid." will be fetched from sharer's server: ".$server);
-                               $item_id = self::store_by_guid($guid, $server);
-                       }
-*/
-                       if ($item_id) {
-                               $r = q("SELECT `body`, `tag`, `app`, `created`, `object-type`, `uri`, `guid`,
-                                               `author-name`, `author-link`, `author-avatar`
-                                       FROM `item` WHERE `id` = %d AND `visible` AND NOT `deleted` AND `body` != '' LIMIT 1",
-                                       intval($item_id));
-
-                               if ($r)
-                                       return $r[0];
-
-                       }
-               }
-               return false;
-       }
-
-       private function receive_reshare($importer, $data) {
-               $root_author = notags(unxmlify($data->root_author));
-               $root_guid = notags(unxmlify($data->root_guid));
-               $guid = notags(unxmlify($data->guid));
-               $author = notags(unxmlify($data->author));
-               $public = notags(unxmlify($data->public));
-               $created_at = notags(unxmlify($data->created_at));
-
-               $contact = self::allowed_contact_by_handle($importer, $author, false);
-               if (!$contact)
-                       return false;
-
-               if (self::message_exists($importer["uid"], $guid))
-                       return false;
-
-               $original_item = self::original_item($root_guid, $root_author, $author);
-               if (!$original_item)
-                       return false;
-
-               $orig_url = App::get_baseurl()."/display/".$original_item["guid"];
-
-               $datarray = array();
-
-               $datarray["uid"] = $importer["uid"];
-               $datarray["contact-id"] = $contact["id"];
-               $datarray["network"]  = NETWORK_DIASPORA;
-
-               $datarray["author-name"] = $contact["name"];
-               $datarray["author-link"] = $contact["url"];
-               $datarray["author-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
-
-               $datarray["owner-name"] = $datarray["author-name"];
-               $datarray["owner-link"] = $datarray["author-link"];
-               $datarray["owner-avatar"] = $datarray["author-avatar"];
-
-               $datarray["guid"] = $guid;
-               $datarray["uri"] = $datarray["parent-uri"] = $author.":".$guid;
-
-               $datarray["verb"] = ACTIVITY_POST;
-               $datarray["gravity"] = GRAVITY_PARENT;
-
-               $datarray["object"] = json_encode($data);
-
-               $prefix = share_header($original_item["author-name"], $original_item["author-link"], $original_item["author-avatar"],
-                                       $original_item["guid"], $original_item["created"], $orig_url);
-               $datarray["body"] = $prefix.$original_item["body"]."[/share]";
-
-               $datarray["tag"] = $original_item["tag"];
-               $datarray["app"]  = $original_item["app"];
-
-               $datarray["plink"] = self::plink($author, $guid);
-               $datarray["private"] = (($public == "false") ? 1 : 0);
-               $datarray["changed"] = $datarray["created"] = $datarray["edited"] = datetime_convert("UTC", "UTC", $created_at);
-
-               $datarray["object-type"] = $original_item["object-type"];
-
-               self::fetch_guid($datarray);
-               $message_id = item_store($datarray);
-
-               if ($message_id)
-                       logger("Stored reshare ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
-
-               return $message_id;
-       }
-
-       private function item_retraction($importer, $contact, $data) {
-               $target_type = notags(unxmlify($data->target_type));
-               $target_guid = notags(unxmlify($data->target_guid));
-               $author = notags(unxmlify($data->author));
-
-               $person = self::person_by_handle($author);
-               if (!is_array($person)) {
-                       logger("unable to find author detail for ".$author);
-                       return false;
-               }
-
-               $r = q("SELECT `id`, `parent`, `parent-uri`, `author-link` FROM `item` WHERE `guid` = '%s' AND `uid` = %d AND NOT `file` LIKE '%%[%%' LIMIT 1",
-                       dbesc($target_guid),
-                       intval($importer["uid"])
-               );
-               if (!$r)
-                       return false;
-
-               // Only delete it if the author really fits
-               if (!link_compare($r[0]["author-link"], $person["url"])) {
-                       logger("Item author ".$r[0]["author-link"]." doesn't fit to expected contact ".$person["url"], LOGGER_DEBUG);
-                       return false;
-               }
-
-               // Check if the sender is the thread owner
-               $p = q("SELECT `id`, `author-link`, `origin` FROM `item` WHERE `id` = %d",
-                       intval($r[0]["parent"]));
-
-               // Only delete it if the parent author really fits
-               if (!link_compare($p[0]["author-link"], $contact["url"]) AND !link_compare($r[0]["author-link"], $contact["url"])) {
-                       logger("Thread author ".$p[0]["author-link"]." and item author ".$r[0]["author-link"]." don't fit to expected contact ".$contact["url"], LOGGER_DEBUG);
-                       return false;
-               }
-
-               // Currently we don't have a central deletion function that we could use in this case. The function "item_drop" doesn't work for that case
-               q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s', `body` = '' , `title` = '' WHERE `id` = %d",
-                       dbesc(datetime_convert()),
-                       dbesc(datetime_convert()),
-                       intval($r[0]["id"])
-               );
-               delete_thread($r[0]["id"], $r[0]["parent-uri"]);
-
-               logger("Deleted target ".$target_guid." (".$r[0]["id"].") from user ".$importer["uid"]." parent: ".$p[0]["id"], LOGGER_DEBUG);
-
-               // Now check if the retraction needs to be relayed by us
-               if($p[0]["origin"]) {
-
-                       // Formerly we stored the signed text, the signature and the author in different fields.
-                       // We now store the raw data so that we are more flexible.
-                       q("INSERT INTO `sign` (`retract_iid`,`signed_text`) VALUES (%d,'%s')",
-                               intval($r[0]["id"]),
-                               dbesc(json_encode($data))
-                       );
-                       $s = q("select * from sign where retract_iid = %d", intval($r[0]["id"]));
-                       logger("Stored signatur for item ".$r[0]["id"]." - ".print_r($s, true), LOGGER_DEBUG);
-
-                       // notify others
-                       proc_run("php", "include/notifier.php", "drop", $r[0]["id"]);
-               }
-       }
-
-       private function receive_retraction($importer, $sender, $data) {
-               $target_type = notags(unxmlify($data->target_type));
-
-               $contact = self::contact_by_handle($importer["uid"], $sender);
-               if (!$contact) {
-                       logger("cannot find contact for sender: ".$sender." and user ".$importer["uid"]);
-                       return false;
-               }
-
-               logger("Got retraction for ".$target_type.", sender ".$sender." and user ".$importer["uid"], LOGGER_DEBUG);
-
-               switch ($target_type) {
-                       case "Comment":
-                       case "Like":
-                       case "Post": // "Post" will be supported in a future version
-                       case "Reshare":
-                       case "StatusMessage":
-                               return self::item_retraction($importer, $contact, $data);;
-
-                       case "Person":
-                               /// @todo What should we do with an "unshare"?
-                               // Removing the contact isn't correct since we still can read the public items
-                               //contact_remove($contact["id"]);
-                               return true;
-
-                       default:
-                               logger("Unknown target type ".$target_type);
-                               return false;
-               }
-               return true;
-       }
-
-       private function receive_status_message($importer, $data) {
-
-               $raw_message = unxmlify($data->raw_message);
-               $guid = notags(unxmlify($data->guid));
-               $author = notags(unxmlify($data->author));
-               $public = notags(unxmlify($data->public));
-               $created_at = notags(unxmlify($data->created_at));
-               $provider_display_name = notags(unxmlify($data->provider_display_name));
-
-               /// @todo enable support for polls
-               //if ($data->poll) {
-               //      foreach ($data->poll AS $poll)
-               //              print_r($poll);
-               //      die("poll!\n");
-               //}
-               $contact = self::allowed_contact_by_handle($importer, $author, false);
-               if (!$contact)
-                       return false;
-
-               if (self::message_exists($importer["uid"], $guid))
-                       return false;
-
-               $address = array();
-               if ($data->location)
-                       foreach ($data->location->children() AS $fieldname => $data)
-                               $address[$fieldname] = notags(unxmlify($data));
-
-               $body = diaspora2bb($raw_message);
-
-               $datarray = array();
-
-               if ($data->photo) {
-                       foreach ($data->photo AS $photo)
-                               $body = "[img]".$photo->remote_photo_path.$photo->remote_photo_name."[/img]\n".$body;
-
-                       $datarray["object-type"] = ACTIVITY_OBJ_PHOTO;
-               } else {
-                       $datarray["object-type"] = ACTIVITY_OBJ_NOTE;
-
-                       // Add OEmbed and other information to the body
-                       if (!self::is_redmatrix($contact["url"]))
-                               $body = add_page_info_to_body($body, false, true);
-               }
-
-               $datarray["uid"] = $importer["uid"];
-               $datarray["contact-id"] = $contact["id"];
-               $datarray["network"] = NETWORK_DIASPORA;
-
-               $datarray["author-name"] = $contact["name"];
-               $datarray["author-link"] = $contact["url"];
-               $datarray["author-avatar"] = ((x($contact,"thumb")) ? $contact["thumb"] : $contact["photo"]);
-
-               $datarray["owner-name"] = $datarray["author-name"];
-               $datarray["owner-link"] = $datarray["author-link"];
-               $datarray["owner-avatar"] = $datarray["author-avatar"];
-
-               $datarray["guid"] = $guid;
-               $datarray["uri"] = $datarray["parent-uri"] = $author.":".$guid;
-
-               $datarray["verb"] = ACTIVITY_POST;
-               $datarray["gravity"] = GRAVITY_PARENT;
-
-               $datarray["object"] = json_encode($data);
-
-               $datarray["body"] = $body;
-
-               if ($provider_display_name != "")
-                       $datarray["app"] = $provider_display_name;
-
-               $datarray["plink"] = self::plink($author, $guid);
-               $datarray["private"] = (($public == "false") ? 1 : 0);
-               $datarray["changed"] = $datarray["created"] = $datarray["edited"] = datetime_convert("UTC", "UTC", $created_at);
-
-               if (isset($address["address"]))
-                       $datarray["location"] = $address["address"];
-
-               if (isset($address["lat"]) AND isset($address["lng"]))
-                       $datarray["coord"] = $address["lat"]." ".$address["lng"];
-
-               self::fetch_guid($datarray);
-               $message_id = item_store($datarray);
-
-               if ($message_id)
-                       logger("Stored item ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
-
-               return $message_id;
-       }
-
-       /******************************************************************************************
-        * Here are all the functions that are needed to transmit data with the Diaspora protocol *
-        ******************************************************************************************/
-
-       private function my_handle($me) {
-               if ($contact["addr"] != "")
-                       return $contact["addr"];
-
-               // Normally we should have a filled "addr" field - but in the past this wasn't the case
-               // So - just in case - we build the the address here.
-               return $me["nickname"]."@".substr(App::get_baseurl(), strpos(App::get_baseurl(),"://") + 3);
-       }
-
-       private function build_public_message($msg, $user, $contact, $prvkey, $pubkey) {
-
-               logger("Message: ".$msg, LOGGER_DATA);
-
-               $handle = self::my_handle($user);
-
-               $b64url_data = base64url_encode($msg);
-
-               $data = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data);
-
-               $type = "application/xml";
-               $encoding = "base64url";
-               $alg = "RSA-SHA256";
-
-               $signable_data = $data.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg);
-
-               $signature = rsa_sign($signable_data,$prvkey);
-               $sig = base64url_encode($signature);
-
-               $xmldata = array("diaspora" => array("header" => array("author_id" => $handle),
-                                               "me:env" => array("me:encoding" => "base64url",
-                                                               "me:alg" => "RSA-SHA256",
-                                                               "me:data" => $data,
-                                                               "@attributes" => array("type" => "application/xml"),
-                                                               "me:sig" => $sig)));
-
-               $namespaces = array("" => "https://joindiaspora.com/protocol",
-                               "me" => "http://salmon-protocol.org/ns/magic-env");
-
-               $magic_env = xml::from_array($xmldata, $xml, false, $namespaces);
-
-               logger("magic_env: ".$magic_env, LOGGER_DATA);
-               return $magic_env;
-       }
-
-       private function build_private_message($msg, $user, $contact, $prvkey, $pubkey) {
-
-               logger("Message: ".$msg, LOGGER_DATA);
-
-               // without a public key nothing will work
-
-               if (!$pubkey) {
-                       logger("pubkey missing: contact id: ".$contact["id"]);
-                       return false;
-               }
-
-               $inner_aes_key = random_string(32);
-               $b_inner_aes_key = base64_encode($inner_aes_key);
-               $inner_iv = random_string(16);
-               $b_inner_iv = base64_encode($inner_iv);
-
-               $outer_aes_key = random_string(32);
-               $b_outer_aes_key = base64_encode($outer_aes_key);
-               $outer_iv = random_string(16);
-               $b_outer_iv = base64_encode($outer_iv);
-
-               $handle = self::my_handle($user);
-
-               $padded_data = pkcs5_pad($msg,16);
-               $inner_encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $inner_aes_key, $padded_data, MCRYPT_MODE_CBC, $inner_iv);
-
-               $b64_data = base64_encode($inner_encrypted);
-
-
-               $b64url_data = base64url_encode($b64_data);
-               $data = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data);
-
-               $type = "application/xml";
-               $encoding = "base64url";
-               $alg = "RSA-SHA256";
-
-               $signable_data = $data.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg);
-
-               $signature = rsa_sign($signable_data,$prvkey);
-               $sig = base64url_encode($signature);
-
-               $xmldata = array("decrypted_header" => array("iv" => $b_inner_iv,
-                                                       "aes_key" => $b_inner_aes_key,
-                                                       "author_id" => $handle));
-
-               $decrypted_header = xml::from_array($xmldata, $xml, true);
-               $decrypted_header = pkcs5_pad($decrypted_header,16);
-
-               $ciphertext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $outer_aes_key, $decrypted_header, MCRYPT_MODE_CBC, $outer_iv);
-
-               $outer_json = json_encode(array("iv" => $b_outer_iv, "key" => $b_outer_aes_key));
-
-               $encrypted_outer_key_bundle = "";
-               openssl_public_encrypt($outer_json, $encrypted_outer_key_bundle, $pubkey);
-
-               $b64_encrypted_outer_key_bundle = base64_encode($encrypted_outer_key_bundle);
-
-               logger("outer_bundle: ".$b64_encrypted_outer_key_bundle." key: ".$pubkey, LOGGER_DATA);
-
-               $encrypted_header_json_object = json_encode(array("aes_key" => base64_encode($encrypted_outer_key_bundle),
-                                                               "ciphertext" => base64_encode($ciphertext)));
-               $cipher_json = base64_encode($encrypted_header_json_object);
-
-               $xmldata = array("diaspora" => array("encrypted_header" => $cipher_json,
-                                               "me:env" => array("me:encoding" => "base64url",
-                                                               "me:alg" => "RSA-SHA256",
-                                                               "me:data" => $data,
-                                                               "@attributes" => array("type" => "application/xml"),
-                                                               "me:sig" => $sig)));
-
-               $namespaces = array("" => "https://joindiaspora.com/protocol",
-                               "me" => "http://salmon-protocol.org/ns/magic-env");
-
-               $magic_env = xml::from_array($xmldata, $xml, false, $namespaces);
-
-               logger("magic_env: ".$magic_env, LOGGER_DATA);
-               return $magic_env;
-       }
-
-       private function build_message($msg, $user, $contact, $prvkey, $pubkey, $public = false) {
-
-               if ($public)
-                       $magic_env =  self::build_public_message($msg,$user,$contact,$prvkey,$pubkey);
-               else
-                       $magic_env =  self::build_private_message($msg,$user,$contact,$prvkey,$pubkey);
-
-               // The data that will be transmitted is double encoded via "urlencode", strange ...
-               $slap = "xml=".urlencode(urlencode($magic_env));
-               return $slap;
-       }
-
-       private function signature($owner, $message) {
-               $sigmsg = $message;
-               unset($sigmsg["author_signature"]);
-               unset($sigmsg["parent_author_signature"]);
-
-               $signed_text = implode(";", $sigmsg);
-
-               return base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256"));
-       }
-
-       public static function transmit($owner, $contact, $slap, $public_batch, $queue_run=false, $guid = "") {
-
-               $a = get_app();
-
-               $enabled = intval(get_config("system", "diaspora_enabled"));
-               if(!$enabled)
-                       return 200;
-
-               $logid = random_string(4);
-               $dest_url = (($public_batch) ? $contact["batch"] : $contact["notify"]);
-               if (!$dest_url) {
-                       logger("no url for contact: ".$contact["id"]." batch mode =".$public_batch);
-                       return 0;
-               }
-
-               logger("transmit: ".$logid."-".$guid." ".$dest_url);
-
-               if (!$queue_run && was_recently_delayed($contact["id"])) {
-                       $return_code = 0;
-               } else {
-                       if (!intval(get_config("system", "diaspora_test"))) {
-                               post_url($dest_url."/", $slap);
-                               $return_code = $a->get_curl_code();
-                       } else {
-                               logger("test_mode");
-                               return 200;
-                       }
-               }
-
-               logger("transmit: ".$logid."-".$guid." returns: ".$return_code);
-
-               if(!$return_code || (($return_code == 503) && (stristr($a->get_curl_headers(), "retry-after")))) {
-                       logger("queue message");
-
-                       $r = q("SELECT `id` FROM `queue` WHERE `cid` = %d AND `network` = '%s' AND `content` = '%s' AND `batch` = %d LIMIT 1",
-                               intval($contact["id"]),
-                               dbesc(NETWORK_DIASPORA),
-                               dbesc($slap),
-                               intval($public_batch)
-                       );
-                       if($r) {
-                               logger("add_to_queue ignored - identical item already in queue");
-                       } else {
-                               // queue message for redelivery
-                               add_to_queue($contact["id"], NETWORK_DIASPORA, $slap, $public_batch);
-                       }
-               }
-
-               return(($return_code) ? $return_code : (-1));
-       }
-
-
-       private function build_and_transmit($owner, $contact, $type, $message, $public_batch = false, $guid = "", $spool = false) {
-
-               $data = array("XML" => array("post" => array($type => $message)));
-
-               $msg = xml::from_array($data, $xml);
-
-               logger('message: '.$msg, LOGGER_DATA);
-               logger('send guid '.$guid, LOGGER_DEBUG);
-
-               $slap = self::build_message($msg, $owner, $contact, $owner['uprvkey'], $contact['pubkey'], $public_batch);
-
-               if ($spool) {
-                       add_to_queue($contact['id'], NETWORK_DIASPORA, $slap, $public_batch);
-                       return true;
-               } else
-                       $return_code = self::transmit($owner, $contact, $slap, $public_batch, false, $guid);
-
-               logger("guid: ".$item["guid"]." result ".$return_code, LOGGER_DEBUG);
-
-               return $return_code;
-       }
-
-       public static function send_share($owner,$contact) {
-
-               $message = array("sender_handle" => self::my_handle($owner),
-                               "recipient_handle" => $contact["addr"]);
-
-               return self::build_and_transmit($owner, $contact, "request", $message);
-       }
-
-       public static function send_unshare($owner,$contact) {
-
-               $message = array("post_guid" => $owner["guid"],
-                               "diaspora_handle" => self::my_handle($owner),
-                               "type" => "Person");
-
-               return self::build_and_transmit($owner, $contact, "retraction", $message);
-       }
-
-       public static function is_reshare($body) {
-               $body = trim($body);
-
-               // Skip if it isn't a pure repeated messages
-               // Does it start with a share?
-               if (strpos($body, "[share") > 0)
-                       return(false);
-
-               // Does it end with a share?
-               if (strlen($body) > (strrpos($body, "[/share]") + 8))
-                       return(false);
-
-               $attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism","$1",$body);
-               // Skip if there is no shared message in there
-               if ($body == $attributes)
-                       return(false);
-
-               $guid = "";
-               preg_match("/guid='(.*?)'/ism", $attributes, $matches);
-               if ($matches[1] != "")
-                       $guid = $matches[1];
-
-               preg_match('/guid="(.*?)"/ism', $attributes, $matches);
-               if ($matches[1] != "")
-                       $guid = $matches[1];
-
-               if ($guid != "") {
-                       $r = q("SELECT `contact-id` FROM `item` WHERE `guid` = '%s' AND `network` IN ('%s', '%s') LIMIT 1",
-                               dbesc($guid), NETWORK_DFRN, NETWORK_DIASPORA);
-                       if ($r) {
-                               $ret= array();
-                               $ret["root_handle"] = self::handle_from_contact($r[0]["contact-id"]);
-                               $ret["root_guid"] = $guid;
-                               return($ret);
-                       }
-               }
-
-               $profile = "";
-               preg_match("/profile='(.*?)'/ism", $attributes, $matches);
-               if ($matches[1] != "")
-                       $profile = $matches[1];
-
-               preg_match('/profile="(.*?)"/ism', $attributes, $matches);
-               if ($matches[1] != "")
-                       $profile = $matches[1];
-
-               $ret= array();
-
-               $ret["root_handle"] = preg_replace("=https?://(.*)/u/(.*)=ism", "$2@$1", $profile);
-               if (($ret["root_handle"] == $profile) OR ($ret["root_handle"] == ""))
-                       return(false);
-
-               $link = "";
-               preg_match("/link='(.*?)'/ism", $attributes, $matches);
-               if ($matches[1] != "")
-                       $link = $matches[1];
-
-               preg_match('/link="(.*?)"/ism', $attributes, $matches);
-               if ($matches[1] != "")
-                       $link = $matches[1];
-
-               $ret["root_guid"] = preg_replace("=https?://(.*)/posts/(.*)=ism", "$2", $link);
-               if (($ret["root_guid"] == $link) OR ($ret["root_guid"] == ""))
-                       return(false);
-               return($ret);
-       }
-
-       public static function send_status($item, $owner, $contact, $public_batch = false) {
-
-               $myaddr = self::my_handle($owner);
-
-               $public = (($item["private"]) ? "false" : "true");
-
-               $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d H:i:s \U\T\C');
-
-               // Detect a share element and do a reshare
-               if (!$item['private'] AND ($ret = self::is_reshare($item["body"]))) {
-                       $message = array("root_diaspora_id" => $ret["root_handle"],
-                                       "root_guid" => $ret["root_guid"],
-                                       "guid" => $item["guid"],
-                                       "diaspora_handle" => $myaddr,
-                                       "public" => $public,
-                                       "created_at" => $created,
-                                       "provider_display_name" => $item["app"]);
-
-                       $type = "reshare";
-               } else {
-                       $title = $item["title"];
-                       $body = $item["body"];
-
-                       // convert to markdown
-                       $body = html_entity_decode(bb2diaspora($body));
-
-                       // Adding the title
-                       if(strlen($title))
-                               $body = "## ".html_entity_decode($title)."\n\n".$body;
-
-                       if ($item["attach"]) {
-                               $cnt = preg_match_all('/href=\"(.*?)\"(.*?)title=\"(.*?)\"/ism', $item["attach"], $matches, PREG_SET_ORDER);
-                               if(cnt) {
-                                       $body .= "\n".t("Attachments:")."\n";
-                                       foreach($matches as $mtch)
-                                               $body .= "[".$mtch[3]."](".$mtch[1].")\n";
-                               }
-                       }
-
-                       $location = array();
-
-                       if ($item["location"] != "")
-                               $location["address"] = $item["location"];
-
-                       if ($item["coord"] != "") {
-                               $coord = explode(" ", $item["coord"]);
-                               $location["lat"] = $coord[0];
-                               $location["lng"] = $coord[1];
-                       }
-
-                       $message = array("raw_message" => $body,
-                                       "location" => $location,
-                                       "guid" => $item["guid"],
-                                       "diaspora_handle" => $myaddr,
-                                       "public" => $public,
-                                       "created_at" => $created,
-                                       "provider_display_name" => $item["app"]);
-
-                       if (count($location) == 0)
-                               unset($message["location"]);
-
-                       $type = "status_message";
-               }
-
-               return self::build_and_transmit($owner, $contact, $type, $message, $public_batch, $item["guid"]);
-       }
-
-       private function construct_like($item, $owner) {
-
-               $myaddr = self::my_handle($owner);
-
-               $p = q("SELECT `guid`, `uri`, `parent-uri` FROM `item` WHERE `uri` = '%s' LIMIT 1",
-                       dbesc($item["thr-parent"]));
-               if(!$p)
-                       return false;
-
-               $parent = $p[0];
-
-               $target_type = ($parent["uri"] === $parent["parent-uri"] ? "Post" : "Comment");
-               $positive = "true";
-
-               return(array("positive" => $positive,
-                               "guid" => $item["guid"],
-                               "target_type" => $target_type,
-                               "parent_guid" => $parent["guid"],
-                               "author_signature" => $authorsig,
-                               "diaspora_handle" => $myaddr));
-       }
-
-       private function construct_comment($item, $owner) {
-
-               $myaddr = self::my_handle($owner);
-
-               $p = q("SELECT `guid` FROM `item` WHERE `parent` = %d AND `id` = %d LIMIT 1",
-                       intval($item["parent"]),
-                       intval($item["parent"])
-               );
-
-               if (!$p)
-                       return false;
-
-               $parent = $p[0];
-
-               $text = html_entity_decode(bb2diaspora($item["body"]));
-
-               return(array("guid" => $item["guid"],
-                               "parent_guid" => $parent["guid"],
-                               "author_signature" => "",
-                               "text" => $text,
-                               "diaspora_handle" => $myaddr));
-       }
-
-       public static function send_followup($item,$owner,$contact,$public_batch = false) {
-
-               if($item['verb'] === ACTIVITY_LIKE) {
-                       $message = self::construct_like($item, $owner);
-                       $type = "like";
-               } else {
-                       $message = self::construct_comment($item, $owner);
-                       $type = "comment";
-               }
-
-               if (!$message)
-                       return false;
-
-               $message["author_signature"] = self::signature($owner, $message);
-
-               return self::build_and_transmit($owner, $contact, $type, $message, $public_batch, $item["guid"]);
-       }
-
-       private function message_from_signatur($item, $signature) {
-
-               // Split the signed text
-               $signed_parts = explode(";", $signature['signed_text']);
-
-               if ($item["deleted"])
-                       $message = array("parent_author_signature" => "",
-                                       "target_guid" => $signed_parts[0],
-                                       "target_type" => $signed_parts[1],
-                                       "sender_handle" => $signature['signer'],
-                                       "target_author_signature" => $signature['signature']);
-               elseif ($item['verb'] === ACTIVITY_LIKE)
-                       $message = array("positive" => $signed_parts[0],
-                                       "guid" => $signed_parts[1],
-                                       "target_type" => $signed_parts[2],
-                                       "parent_guid" => $signed_parts[3],
-                                       "parent_author_signature" => "",
-                                       "author_signature" => $signature['signature'],
-                                       "diaspora_handle" => $signed_parts[4]);
-               else {
-                       // Remove the comment guid
-                       $guid = array_shift($signed_parts);
-
-                       // Remove the parent guid
-                       $parent_guid = array_shift($signed_parts);
-
-                       // Remove the handle
-                       $handle = array_pop($signed_parts);
-
-                       // Glue the parts together
-                       $text = implode(";", $signed_parts);
-
-                       $message = array("guid" => $guid,
-                                       "parent_guid" => $parent_guid,
-                                       "parent_author_signature" => "",
-                                       "author_signature" => $signature['signature'],
-                                       "text" => implode(";", $signed_parts),
-                                       "diaspora_handle" => $handle);
-               }
-               return $message;
-       }
-
-       public static function send_relay($item, $owner, $contact, $public_batch = false) {
-
-               if ($item["deleted"]) {
-                       $sql_sign_id = "retract_iid";
-                       $type = "relayable_retraction";
-               } elseif ($item['verb'] === ACTIVITY_LIKE) {
-                       $sql_sign_id = "iid";
-                       $type = "like";
-               } else {
-                       $sql_sign_id = "iid";
-                       $type = "comment";
-               }
-
-               logger("Got relayable data ".$type." for item ".$item["guid"]." (".$item["id"].")", LOGGER_DEBUG);
-
-               // fetch the original signature
-
-               $r = q("SELECT `signed_text`, `signature`, `signer` FROM `sign` WHERE `".$sql_sign_id."` = %d LIMIT 1",
-                       intval($item["id"]));
-
-               if (!$r)
-                       return self::send_followup($item, $owner, $contact, $public_batch);
-
-               $signature = $r[0];
-
-               // Old way - is used by the internal Friendica functions
-               /// @todo Change all signatur storing functions to the new format
-               if ($signature['signed_text'] AND $signature['signature'] AND $signature['signer'])
-                       $message = self::message_from_signatur($item, $signature);
-               else {// New way
-                       $msg = json_decode($signature['signed_text'], true);
-
-                       $message = array();
-                       foreach ($msg AS $field => $data) {
-                               if (!$item["deleted"]) {
-                                       if ($field == "author")
-                                               $field = "diaspora_handle";
-                                       if ($field == "parent_type")
-                                               $field = "target_type";
-                               }
-
-                               $message[$field] = $data;
-                       }
-               }
-
-               if ($item["deleted"]) {
-                       $signed_text = $message["target_guid"].';'.$message["target_type"];
-                       $message["parent_author_signature"] = base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256"));
-               } else
-                       $message["parent_author_signature"] = self::signature($owner, $message);
-
-               logger("Relayed data ".print_r($message, true), LOGGER_DEBUG);
-
-               return self::build_and_transmit($owner, $contact, $type, $message, $public_batch, $item["guid"]);
-       }
-
-       public static function send_retraction($item, $owner, $contact, $public_batch = false) {
-
-               $myaddr = self::my_handle($owner);
-
-               // Check whether the retraction is for a top-level post or whether it's a relayable
-               if ($item["uri"] !== $item["parent-uri"]) {
-                       $msg_type = "relayable_retraction";
-                       $target_type = (($item["verb"] === ACTIVITY_LIKE) ? "Like" : "Comment");
-               } else {
-                       $msg_type = "signed_retraction";
-                       $target_type = "StatusMessage";
-               }
-
-               $signed_text = $item["guid"].";".$target_type;
-
-               $message = array("target_guid" => $item['guid'],
-                               "target_type" => $target_type,
-                               "sender_handle" => $myaddr,
-                               "target_author_signature" => base64_encode(rsa_sign($signed_text,$owner['uprvkey'],'sha256')));
-
-               return self::build_and_transmit($owner, $contact, $msg_type, $message, $public_batch, $item["guid"]);
-       }
-
-       public static function send_mail($item, $owner, $contact) {
-
-               $myaddr = self::my_handle($owner);
-
-               $r = q("SELECT * FROM `conv` WHERE `id` = %d AND `uid` = %d LIMIT 1",
-                       intval($item["convid"]),
-                       intval($item["uid"])
-               );
-
-               if (!$r) {
-                       logger("conversation not found.");
-                       return;
-               }
-               $cnv = $r[0];
-
-               $conv = array(
-                       "guid" => $cnv["guid"],
-                       "subject" => $cnv["subject"],
-                       "created_at" => datetime_convert("UTC", "UTC", $cnv['created'], 'Y-m-d H:i:s \U\T\C'),
-                       "diaspora_handle" => $cnv["creator"],
-                       "participant_handles" => $cnv["recips"]
-               );
-
-               $body = bb2diaspora($item["body"]);
-               $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d H:i:s \U\T\C');
-
-               $signed_text = $item["guid"].";".$cnv["guid"].";".$body.";".$created.";".$myaddr.";".$cnv['guid'];
-               $sig = base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256"));
-
-               $msg = array(
-                       "guid" => $item["guid"],
-                       "parent_guid" => $cnv["guid"],
-                       "parent_author_signature" => $sig,
-                       "author_signature" => $sig,
-                       "text" => $body,
-                       "created_at" => $created,
-                       "diaspora_handle" => $myaddr,
-                       "conversation_guid" => $cnv["guid"]
-               );
-
-               if ($item["reply"]) {
-                       $message = $msg;
-                       $type = "message";
-               } else {
-                       $message = array("guid" => $cnv["guid"],
-                                       "subject" => $cnv["subject"],
-                                       "created_at" => datetime_convert("UTC", "UTC", $cnv['created'], 'Y-m-d H:i:s \U\T\C'),
-                                       "message" => $msg,
-                                       "diaspora_handle" => $cnv["creator"],
-                                       "participant_handles" => $cnv["recips"]);
-
-                       $type = "conversation";
-               }
-
-               return self::build_and_transmit($owner, $contact, $type, $message, false, $item["guid"]);
-       }
-
-       public static function send_profile($uid) {
-
-               if (!$uid)
-                       return;
-
-               $recips = q("SELECT `id`,`name`,`network`,`pubkey`,`notify` FROM `contact` WHERE `network` = '%s'
-                       AND `uid` = %d AND `rel` != %d",
-                       dbesc(NETWORK_DIASPORA),
-                       intval($uid),
-                       intval(CONTACT_IS_SHARING)
-               );
-               if (!$recips)
-                       return;
-
-               $r = q("SELECT `profile`.`uid` AS `profile_uid`, `profile`.* , `user`.*, `user`.`prvkey` AS `uprvkey`, `contact`.`addr`
-                       FROM `profile`
-                       INNER JOIN `user` ON `profile`.`uid` = `user`.`uid`
-                       INNER JOIN `contact` ON `profile`.`uid` = `contact`.`uid`
-                       WHERE `user`.`uid` = %d AND `profile`.`is-default` AND `contact`.`self` LIMIT 1",
-                       intval($uid)
-               );
-
-               if (!$r)
-                       return;
-
-               $profile = $r[0];
-
-               $handle = $profile["addr"];
-               $first = ((strpos($profile['name'],' ')
-                       ? trim(substr($profile['name'],0,strpos($profile['name'],' '))) : $profile['name']));
-               $last = (($first === $profile['name']) ? '' : trim(substr($profile['name'], strlen($first))));
-               $large = App::get_baseurl().'/photo/custom/300/'.$profile['uid'].'.jpg';
-               $medium = App::get_baseurl().'/photo/custom/100/'.$profile['uid'].'.jpg';
-               $small = App::get_baseurl().'/photo/custom/50/'  .$profile['uid'].'.jpg';
-               $searchable = (($profile['publish'] && $profile['net-publish']) ? 'true' : 'false');
-
-               if ($searchable === 'true') {
-                       $dob = '1000-00-00';
-
-                       if (($profile['dob']) && ($profile['dob'] != '0000-00-00'))
-                               $dob = ((intval($profile['dob'])) ? intval($profile['dob']) : '1000') .'-'. datetime_convert('UTC','UTC',$profile['dob'],'m-d');
-
-                       $about = $profile['about'];
-                       $about = strip_tags(bbcode($about));
-
-                       $location = formatted_location($profile);
-                       $tags = '';
-                       if ($profile['pub_keywords']) {
-                               $kw = str_replace(',',' ',$profile['pub_keywords']);
-                               $kw = str_replace('  ',' ',$kw);
-                               $arr = explode(' ',$profile['pub_keywords']);
-                               if (count($arr)) {
-                                       for($x = 0; $x < 5; $x ++) {
-                                               if (trim($arr[$x]))
-                                                       $tags .= '#'. trim($arr[$x]) .' ';
-                                       }
-                               }
-                       }
-                       $tags = trim($tags);
-               }
-
-               $message = array("diaspora_handle" => $handle,
-                               "first_name" => $first,
-                               "last_name" => $last,
-                               "image_url" => $large,
-                               "image_url_medium" => $medium,
-                               "image_url_small" => $small,
-                               "birthday" => $dob,
-                               "gender" => $profile['gender'],
-                               "bio" => $about,
-                               "location" => $location,
-                               "searchable" => $searchable,
-                               "tag_string" => $tags);
-
-               foreach($recips as $recip)
-                       self::build_and_transmit($profile, $recip, "profile", $message, false, "", true);
-       }
-}
-?>