]> git.mxchange.org Git - friendica.git/blobdiff - src/Protocol/Diaspora.php
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[friendica.git] / src / Protocol / Diaspora.php
index 6ef529b7fef8714e37ee9014b35c1e5aa82236c9..b5ecfcefcc9d16f1b934fdd7d8d87e735249e1b2 100644 (file)
@@ -16,10 +16,12 @@ use Friendica\Core\Cache;
 use Friendica\Core\Config;
 use Friendica\Core\L10n;
 use Friendica\Core\PConfig;
+use Friendica\Core\Protocol;
 use Friendica\Core\System;
 use Friendica\Core\Worker;
-use Friendica\Database\DBM;
+use Friendica\Database\DBA;
 use Friendica\Model\Contact;
+use Friendica\Model\Conversation;
 use Friendica\Model\GContact;
 use Friendica\Model\Group;
 use Friendica\Model\Item;
@@ -29,10 +31,9 @@ use Friendica\Model\User;
 use Friendica\Network\Probe;
 use Friendica\Util\Crypto;
 use Friendica\Util\DateTimeFormat;
+use Friendica\Util\Map;
 use Friendica\Util\Network;
 use Friendica\Util\XML;
-use Friendica\Util\Map;
-use dba;
 use SimpleXMLElement;
 
 require_once 'include/dba.php';
@@ -54,13 +55,14 @@ class Diaspora
         *
         * @return array of relay servers
         */
-       public static function relayList($item_id, $contacts = [])
+       public static function relayList($item_id, array $contacts = [])
        {
                $serverlist = [];
 
                // Fetching relay servers
                $serverdata = Config::get("system", "relay_server");
-               if ($serverdata != "") {
+
+               if (!empty($serverdata)) {
                        $servers = explode(",", $serverdata);
                        foreach ($servers as $server) {
                                $serverlist[$server] = trim($server);
@@ -70,37 +72,37 @@ class Diaspora
                if (Config::get("system", "relay_directly", false)) {
                        // We distribute our stuff based on the parent to ensure that the thread will be complete
                        $parent = Item::selectFirst(['parent'], ['id' => $item_id]);
-                       if (!DBM::is_result($parent)) {
+                       if (!DBA::isResult($parent)) {
                                return;
                        }
 
                        // Servers that want to get all content
-                       $servers = dba::select('gserver', ['url'], ['relay-subscribe' => true, 'relay-scope' => 'all']);
-                       while ($server = dba::fetch($servers)) {
+                       $servers = DBA::select('gserver', ['url'], ['relay-subscribe' => true, 'relay-scope' => 'all']);
+                       while ($server = DBA::fetch($servers)) {
                                $serverlist[$server['url']] = $server['url'];
                        }
 
                        // All tags of the current post
                        $condition = ['otype' => TERM_OBJ_POST, 'type' => TERM_HASHTAG, 'oid' => $parent['parent']];
-                       $tags = dba::select('term', ['term'], $condition);
+                       $tags = DBA::select('term', ['term'], $condition);
                        $taglist = [];
-                       while ($tag = dba::fetch($tags)) {
+                       while ($tag = DBA::fetch($tags)) {
                                $taglist[] = $tag['term'];
                        }
 
                        // All servers who wants content with this tag
                        $tagserverlist = [];
                        if (!empty($taglist)) {
-                               $tagserver = dba::select('gserver-tag', ['gserver-id'], ['tag' => $taglist]);
-                               while ($server = dba::fetch($tagserver)) {
+                               $tagserver = DBA::select('gserver-tag', ['gserver-id'], ['tag' => $taglist]);
+                               while ($server = DBA::fetch($tagserver)) {
                                        $tagserverlist[] = $server['gserver-id'];
                                }
                        }
 
                        // All adresses with the given id
                        if (!empty($tagserverlist)) {
-                               $servers = dba::select('gserver', ['url'], ['relay-subscribe' => true, 'relay-scope' => 'tags', 'id' => $tagserverlist]);
-                               while ($server = dba::fetch($servers)) {
+                               $servers = DBA::select('gserver', ['url'], ['relay-subscribe' => true, 'relay-scope' => 'tags', 'id' => $tagserverlist]);
+                               while ($server = DBA::fetch($servers)) {
                                        $serverlist[$server['url']] = $server['url'];
                                }
                        }
@@ -144,10 +146,10 @@ class Diaspora
 
                // Fetch the relay contact
                $condition = ['uid' => 0, 'nurl' => normalise_link($server_url),
-                       'contact-type' => ACCOUNT_TYPE_RELAY];
-               $contact = dba::selectFirst('contact', $fields, $condition);
+                       'contact-type' => Contact::ACCOUNT_TYPE_RELAY];
+               $contact = DBA::selectFirst('contact', $fields, $condition);
 
-               if (DBM::is_result($contact)) {
+               if (DBA::isResult($contact)) {
                        if ($contact['archive'] || $contact['blocked']) {
                                return false;
                        }
@@ -155,8 +157,8 @@ class Diaspora
                } else {
                        self::setRelayContact($server_url);
 
-                       $contact = dba::selectFirst('contact', $fields, $condition);
-                       if (DBM::is_result($contact)) {
+                       $contact = DBA::selectFirst('contact', $fields, $condition);
+                       if (DBA::isResult($contact)) {
                                return $contact;
                        }
                }
@@ -171,25 +173,25 @@ class Diaspora
         * @param string $server_url The url of the server
         * @param array $network_fields Optional network specific fields
         */
-       public static function setRelayContact($server_url, $network_fields = [])
+       public static function setRelayContact($server_url, array $network_fields = [])
        {
                $fields = ['created' => DateTimeFormat::utcNow(),
                        'name' => 'relay', 'nick' => 'relay',
-                       'url' => $server_url, 'network' => NETWORK_DIASPORA,
+                       'url' => $server_url, 'network' => Protocol::DIASPORA,
                        'batch' => $server_url . '/receive/public',
-                       'rel' => CONTACT_IS_FOLLOWER, 'blocked' => false,
+                       'rel' => Contact::FOLLOWER, 'blocked' => false,
                        'pending' => false, 'writable' => true];
 
                $fields = array_merge($fields, $network_fields);
 
                $condition = ['uid' => 0, 'nurl' => normalise_link($server_url),
-                       'contact-type' => ACCOUNT_TYPE_RELAY];
+                       'contact-type' => Contact::ACCOUNT_TYPE_RELAY];
 
-               if (dba::exists('contact', $condition)) {
+               if (DBA::exists('contact', $condition)) {
                        unset($fields['created']);
                }
 
-               dba::update('contact', $fields, $condition, true);
+               DBA::update('contact', $fields, $condition, true);
        }
 
        /**
@@ -204,15 +206,15 @@ class Diaspora
         *
         * @return array of relay servers
         */
-       public static function participantsForThread($thread, $contacts)
+       public static function participantsForThread($thread, array $contacts)
        {
-               $r = dba::p("SELECT `contact`.`batch`, `contact`.`id`, `contact`.`name`, `contact`.`network`,
+               $r = DBA::p("SELECT `contact`.`batch`, `contact`.`id`, `contact`.`name`, `contact`.`network`,
                                `fcontact`.`batch` AS `fbatch`, `fcontact`.`network` AS `fnetwork` FROM `participation`
                                INNER JOIN `contact` ON `contact`.`id` = `participation`.`cid`
                                INNER JOIN `fcontact` ON `fcontact`.`id` = `participation`.`fid`
                                WHERE `participation`.`iid` = ?", $thread);
 
-               while ($contact = dba::fetch($r)) {
+               while ($contact = DBA::fetch($r)) {
                        if (!empty($contact['fnetwork'])) {
                                $contact['network'] = $contact['fnetwork'];
                        }
@@ -234,7 +236,7 @@ class Diaspora
                                $contacts[] = $contact;
                        }
                }
-               dba::close($r);
+               DBA::close($r);
 
                return $contacts;
        }
@@ -363,15 +365,16 @@ class Diaspora
        /**
         * @brief: Decodes incoming Diaspora message in the new format
         *
-        * @param array  $importer Array of the importer user
-        * @param string $raw      raw post message
+        * @param array   $importer Array of the importer user
+        * @param string  $raw      raw post message
+        * @param boolean $no_exit  Don't do an http exit on error
         *
         * @return array
         * 'message' -> decoded Diaspora XML message
         * 'author' -> author diaspora handle
         * 'key' -> author public key (converted to pkcs#8)
         */
-       public static function decodeRaw($importer, $raw)
+       public static function decodeRaw(array $importer, $raw, $no_exit = false)
        {
                $data = json_decode($raw);
 
@@ -386,7 +389,11 @@ class Diaspora
 
                        if (!is_object($j_outer_key_bundle)) {
                                logger('Outer Salmon did not verify. Discarding.');
-                               System::httpExit(400);
+                               if ($no_exit) {
+                                       return false;
+                               } else {
+                                       System::httpExit(400);
+                               }
                        }
 
                        $outer_iv = base64_decode($j_outer_key_bundle->iv);
@@ -401,7 +408,11 @@ class Diaspora
 
                if (!is_object($basedom)) {
                        logger('Received data does not seem to be an XML. Discarding. '.$xml);
-                       System::httpExit(400);
+                       if ($no_exit) {
+                               return false;
+                       } else {
+                               System::httpExit(400);
+                       }
                }
 
                $base = $basedom->children(NAMESPACE_SALMON_ME);
@@ -423,19 +434,31 @@ class Diaspora
                $author_addr = base64_decode($key_id);
                if ($author_addr == '') {
                        logger('No author could be decoded. Discarding. Message: ' . $xml);
-                       System::httpExit(400);
+                       if ($no_exit) {
+                               return false;
+                       } else {
+                               System::httpExit(400);
+                       }
                }
 
                $key = self::key($author_addr);
                if ($key == '') {
                        logger("Couldn't get a key for handle " . $author_addr . ". Discarding.");
-                       System::httpExit(400);
+                       if ($no_exit) {
+                               return false;
+                       } else {
+                               System::httpExit(400);
+                       }
                }
 
                $verify = Crypto::rsaVerify($signed_data, $signature, $key);
                if (!$verify) {
                        logger('Message did not verify. Discarding.');
-                       System::httpExit(400);
+                       if ($no_exit) {
+                               return false;
+                       } else {
+                               System::httpExit(400);
+                       }
                }
 
                return ['message' => (string)base64url_decode($base->data),
@@ -454,7 +477,7 @@ class Diaspora
         * 'author' -> author diaspora handle
         * 'key' -> author public key (converted to pkcs#8)
         */
-       public static function decode($importer, $xml)
+       public static function decode(array $importer, $xml)
        {
                $public = false;
                $basedom = XML::parseString($xml);
@@ -604,7 +627,7 @@ class Diaspora
                        return false;
                }
 
-               $importer = ["uid" => 0, "page-flags" => PAGE_FREELOVE];
+               $importer = ["uid" => 0, "page-flags" => Contact::PAGE_FREELOVE];
                $success = self::dispatch($importer, $msg, $fields);
 
                return $success;
@@ -619,7 +642,7 @@ class Diaspora
         *
         * @return int The message id of the generated message, "true" or "false" if there was an error
         */
-       public static function dispatch($importer, $msg, $fields = null)
+       public static function dispatch(array $importer, $msg, $fields = null)
        {
                // 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")
@@ -898,8 +921,8 @@ class Diaspora
        {
                $update = false;
 
-               $person = dba::selectFirst('fcontact', [], ['network' => NETWORK_DIASPORA, 'addr' => $handle]);
-               if (DBM::is_result($person)) {
+               $person = DBA::selectFirst('fcontact', [], ['network' => Protocol::DIASPORA, 'addr' => $handle]);
+               if (DBA::isResult($person)) {
                        logger("In cache " . print_r($person, true), LOGGER_DEBUG);
 
                        // update record occasionally so it doesn't get stale
@@ -913,18 +936,18 @@ class Diaspora
                        }
                }
 
-               if (!DBM::is_result($person) || $update) {
+               if (!DBA::isResult($person) || $update) {
                        logger("create or refresh", LOGGER_DEBUG);
-                       $r = Probe::uri($handle, NETWORK_DIASPORA);
+                       $r = Probe::uri($handle, Protocol::DIASPORA);
 
                        // Note that Friendica contacts will return a "Diaspora person"
                        // if Diaspora connectivity is enabled on their server
-                       if ($r && ($r["network"] === NETWORK_DIASPORA)) {
+                       if ($r && ($r["network"] === Protocol::DIASPORA)) {
                                self::updateFContact($r);
 
                                // Fetch the updated or added contact
-                               $person = dba::selectFirst('fcontact', [], ['network' => NETWORK_DIASPORA, 'addr' => $handle]);
-                               if (!DBM::is_result($person)) {
+                               $person = DBA::selectFirst('fcontact', [], ['network' => Protocol::DIASPORA, 'addr' => $handle]);
+                               if (!DBA::isResult($person)) {
                                        $person = $r;
                                }
                        }
@@ -950,7 +973,7 @@ class Diaspora
 
                $condition = ['url' => $arr["url"], 'network' => $arr["network"]];
 
-               dba::update('fcontact', $fields, $condition, true);
+               DBA::update('fcontact', $fields, $condition, true);
        }
 
        /**
@@ -968,13 +991,10 @@ class Diaspora
                logger("contact id is ".$contact_id." - pcontact id is ".$pcontact_id, LOGGER_DEBUG);
 
                if ($pcontact_id != 0) {
-                       $r = q(
-                               "SELECT `addr` FROM `contact` WHERE `id` = %d AND `addr` != ''",
-                               intval($pcontact_id)
-                       );
+                       $contact = DBA::selectFirst('contact', ['addr'], ['id' => $pcontact_id]);
 
-                       if (DBM::is_result($r)) {
-                               return strtolower($r[0]["addr"]);
+                       if (DBA::isResult($contact) && !empty($contact["addr"])) {
+                               return strtolower($contact["addr"]);
                        }
                }
 
@@ -983,7 +1003,7 @@ class Diaspora
                        intval($contact_id)
                );
 
-               if (DBM::is_result($r)) {
+               if (DBA::isResult($r)) {
                        $contact = $r[0];
 
                        logger("contact 'self' = ".$contact['self']." 'url' = ".$contact['url'], LOGGER_DEBUG);
@@ -1016,11 +1036,11 @@ class Diaspora
 
                $r = q(
                        "SELECT `url` FROM `fcontact` WHERE `url` != '' AND `network` = '%s' AND `guid` = '%s'",
-                       dbesc(NETWORK_DIASPORA),
-                       dbesc($fcontact_guid)
+                       DBA::escape(Protocol::DIASPORA),
+                       DBA::escape($fcontact_guid)
                );
 
-               if (DBM::is_result($r)) {
+               if (DBA::isResult($r)) {
                        return $r[0]['url'];
                }
 
@@ -1039,46 +1059,26 @@ class Diaspora
         */
        private static function contactByHandle($uid, $handle)
        {
-               // First do a direct search on the contact table
-               $r = q(
-                       "SELECT * FROM `contact` WHERE `uid` = %d AND `addr` = '%s' LIMIT 1",
-                       intval($uid),
-                       dbesc($handle)
-               );
-
-               if (DBM::is_result($r)) {
-                       return $r[0];
-               } else {
-                       /*
-                        * We haven't found it?
-                        * We use another function for it that will possibly create a contact entry.
-                        */
-                       $cid = Contact::getIdForURL($handle, $uid);
-
-                       if ($cid > 0) {
-                               /// @TODO Contact retrieval should be encapsulated into an "entity" class like `Contact`
-                               $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1", intval($cid));
+               $cid = Contact::getIdForURL($handle, $uid);
+               if (!$cid) {
+                       $handle_parts = explode("@", $handle);
+                       $nurl_sql = "%%://" . $handle_parts[1] . "%%/profile/" . $handle_parts[0];
+                       $cid = Contact::getIdForURL($nurl_sql, $uid);
+               }
 
-                               if (DBM::is_result($r)) {
-                                       return $r[0];
-                               }
-                       }
+               if (!$cid) {
+                       logger("Haven't found a contact for user " . $uid . " and handle " . $handle, LOGGER_DEBUG);
+                       return false;
                }
 
-               $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($nurl_sql)
-               );
-               if (DBM::is_result($r)) {
-                       return $r[0];
+               $contact = DBA::selectFirst('contact', [], ['id' => $cid]);
+               if (!DBA::isResult($contact)) {
+                       // This here shouldn't happen at all
+                       logger("Haven't found a contact for user " . $uid . " and handle " . $handle, LOGGER_DEBUG);
+                       return false;
                }
 
-               logger("Haven't found contact for user ".$uid." and handle ".$handle, LOGGER_DEBUG);
-               return false;
+               return $contact;
        }
 
        /**
@@ -1090,7 +1090,7 @@ class Diaspora
         *
         * @return bool is the contact allowed to post?
         */
-       private static function postAllow($importer, $contact, $is_comment = false)
+       private static function postAllow(array $importer, array $contact, $is_comment = false)
        {
                /*
                 * Perhaps we were already sharing with this person. Now they're sharing with us.
@@ -1099,14 +1099,14 @@ class Diaspora
                 */
                // It is deactivated by now, due to side effects. See issue https://github.com/friendica/friendica/pull/4033
                // It is not removed by now. Possibly the code is needed?
-               //if (!$is_comment && $contact["rel"] == CONTACT_IS_FOLLOWER && in_array($importer["page-flags"], array(PAGE_FREELOVE))) {
-               //      dba::update(
+               //if (!$is_comment && $contact["rel"] == Contact::FOLLOWER && in_array($importer["page-flags"], array(Contact::PAGE_FREELOVE))) {
+               //      DBA::update(
                //              'contact',
-               //              array('rel' => CONTACT_IS_FRIEND, 'writable' => true),
+               //              array('rel' => Contact::FRIEND, 'writable' => true),
                //              array('id' => $contact["id"], 'uid' => $contact["uid"])
                //      );
                //
-               //      $contact["rel"] = CONTACT_IS_FRIEND;
+               //      $contact["rel"] = Contact::FRIEND;
                //      logger("defining user ".$contact["nick"]." as friend");
                //}
 
@@ -1115,11 +1115,11 @@ class Diaspora
                        // Maybe blocked, don't accept.
                        return false;
                        // We are following this person?
-               } elseif (($contact["rel"] == CONTACT_IS_SHARING) || ($contact["rel"] == CONTACT_IS_FRIEND)) {
+               } elseif (($contact["rel"] == Contact::SHARING) || ($contact["rel"] == Contact::FRIEND)) {
                        // Yes, then it is fine.
                        return true;
                        // Is it a post to a community?
-               } elseif (($contact["rel"] == CONTACT_IS_FOLLOWER) && in_array($importer["page-flags"], [PAGE_COMMUNITY, PAGE_PRVGROUP])) {
+               } elseif (($contact["rel"] == Contact::FOLLOWER) && in_array($importer["page-flags"], [Contact::PAGE_COMMUNITY, Contact::PAGE_PRVGROUP])) {
                        // That's good
                        return true;
                        // Is the message a global user or a comment?
@@ -1140,13 +1140,15 @@ class Diaspora
         *
         * @return array The contact data
         */
-       private static function allowedContactByHandle($importer, $handle, $is_comment = false)
+       private static function allowedContactByHandle(array $importer, $handle, $is_comment = false)
        {
                $contact = self::contactByHandle($importer["uid"], $handle);
                if (!$contact) {
                        logger("A Contact for handle ".$handle." and user ".$importer["uid"]." was not found");
                        // If a contact isn't found, we accept it anyway if it is a comment
-                       if ($is_comment) {
+                       if ($is_comment && ($importer["uid"] != 0)) {
+                               return self::contactByHandle(0, $handle);
+                       } elseif ($is_comment) {
                                return $importer;
                        } else {
                                return false;
@@ -1171,7 +1173,7 @@ class Diaspora
        private static function messageExists($uid, $guid)
        {
                $item = Item::selectFirst(['id'], ['uid' => $uid, 'guid' => $guid]);
-               if (DBM::is_result($item)) {
+               if (DBA::isResult($item)) {
                        logger("message ".$guid." already exists for user ".$uid);
                        return $item["id"];
                }
@@ -1185,7 +1187,7 @@ class Diaspora
         * @param array $item The item array
         * @return void
         */
-       private static function fetchGuid($item)
+       private static function fetchGuid(array $item)
        {
                $expression = "=diaspora://.*?/post/([0-9A-Za-z\-_@.:]{15,254}[0-9A-Za-z])=ism";
                preg_replace_callback(
@@ -1267,6 +1269,11 @@ class Diaspora
        private static function storeByGuid($guid, $server, $uid = 0)
        {
                $serverparts = parse_url($server);
+
+               if (empty($serverparts["host"]) || empty($serverparts["scheme"])) {
+                       return false;
+               }
+
                $server = $serverparts["scheme"]."://".$serverparts["host"];
 
                logger("Trying to fetch item ".$guid." from ".$server, LOGGER_DEBUG);
@@ -1349,7 +1356,7 @@ class Diaspora
                $author = "";
 
                // Fetch the author - for the old and the new Diaspora version
-               if ($source_xml->post->status_message->diaspora_handle) {
+               if ($source_xml->post->status_message && $source_xml->post->status_message->diaspora_handle) {
                        $author = (string)$source_xml->post->status_message->diaspora_handle;
                } elseif ($source_xml->author && ($source_xml->getName() == "status_message")) {
                        $author = (string)$source_xml->author;
@@ -1378,7 +1385,7 @@ class Diaspora
         *
         * @return array the item record
         */
-       private static function parentItem($uid, $guid, $author, $contact)
+       private static function parentItem($uid, $guid, $author, array $contact)
        {
                $fields = ['id', 'parent', 'body', 'wall', 'uri', 'guid', 'private', 'origin',
                        'author-name', 'author-link', 'author-avatar',
@@ -1386,12 +1393,13 @@ class Diaspora
                $condition = ['uid' => $uid, 'guid' => $guid];
                $item = Item::selectFirst($fields, $condition);
 
-               if (!DBM::is_result($item)) {
-                       $result = self::storeByGuid($guid, $contact["url"], $uid);
+               if (!DBA::isResult($item)) {
+                       $person = self::personByHandle($author);
+                       $result = self::storeByGuid($guid, $person["url"], $uid);
 
-                       if (!$result) {
-                               $person = self::personByHandle($author);
-                               $result = self::storeByGuid($guid, $person["url"], $uid);
+                       // We don't have an url for items that arrived at the public dispatcher
+                       if (!$result && !empty($contact["url"])) {
+                               $result = self::storeByGuid($guid, $contact["url"], $uid);
                        }
 
                        if ($result) {
@@ -1401,7 +1409,7 @@ class Diaspora
                        }
                }
 
-               if (!DBM::is_result($item)) {
+               if (!DBA::isResult($item)) {
                        logger("parent item not found: parent: ".$guid." - user: ".$uid);
                        return false;
                } else {
@@ -1424,13 +1432,13 @@ class Diaspora
        private static function authorContactByUrl($def_contact, $person, $uid)
        {
                $condition = ['nurl' => normalise_link($person["url"]), 'uid' => $uid];
-               $contact = dba::selectFirst('contact', ['id', 'network'], $condition);
-               if (DBM::is_result($contact)) {
+               $contact = DBA::selectFirst('contact', ['id', 'network'], $condition);
+               if (DBA::isResult($contact)) {
                        $cid = $contact["id"];
                        $network = $contact["network"];
                } else {
                        $cid = $def_contact["id"];
-                       $network = NETWORK_DIASPORA;
+                       $network = Protocol::DIASPORA;
                }
 
                return ["cid" => $cid, "network" => $network];
@@ -1470,7 +1478,7 @@ class Diaspora
                        }
                }
 
-               if ($contact["network"] == NETWORK_DFRN) {
+               if ($contact["network"] == Protocol::DFRN) {
                        return str_replace("/profile/" . $contact["nick"] . "/", "/display/" . $guid, $contact["url"] . "/");
                }
 
@@ -1493,7 +1501,7 @@ class Diaspora
         *
         * @return bool Success
         */
-       private static function receiveAccountMigration($importer, $data)
+       private static function receiveAccountMigration(array $importer, $data)
        {
                $old_handle = notags(unxmlify($data->author));
                $new_handle = notags(unxmlify($data->profile->author));
@@ -1520,7 +1528,7 @@ class Diaspora
 
                // change the technical stuff in contact and gcontact
                $data = Probe::uri($new_handle);
-               if ($data['network'] == NETWORK_PHANTOM) {
+               if ($data['network'] == Protocol::PHANTOM) {
                        logger('Account for '.$new_handle." couldn't be probed.");
                        return false;
                }
@@ -1531,7 +1539,7 @@ class Diaspora
                                'notify' => $data['notify'], 'poll' => $data['poll'],
                                'network' => $data['network']];
 
-               dba::update('contact', $fields, ['addr' => $old_handle]);
+               DBA::update('contact', $fields, ['addr' => $old_handle]);
 
                $fields = ['url' => $data['url'], 'nurl' => normalise_link($data['url']),
                                'name' => $data['name'], 'nick' => $data['nick'],
@@ -1539,17 +1547,10 @@ class Diaspora
                                'notify' => $data['notify'], 'photo' => $data['photo'],
                                'server_url' => $data['baseurl'], 'network' => $data['network']];
 
-               dba::update('gcontact', $fields, ['addr' => $old_handle]);
+               DBA::update('gcontact', $fields, ['addr' => $old_handle]);
 
                logger('Contacts are updated.');
 
-               // update items
-               // This is an extreme performance killer
-               Item::update(['owner-link' => $data["url"]], ['owner-link' => $contact["url"], 'uid' => $importer["uid"]]);
-               Item::update(['author-link' => $data["url"]], ['author-link' => $contact["url"], 'uid' => $importer["uid"]]);
-
-               logger('Items are updated.');
-
                return true;
        }
 
@@ -1564,12 +1565,12 @@ class Diaspora
        {
                $author = notags(unxmlify($data->author));
 
-               $contacts = dba::select('contact', ['id'], ['addr' => $author]);
-               while ($contact = dba::fetch($contacts)) {
+               $contacts = DBA::select('contact', ['id'], ['addr' => $author]);
+               while ($contact = DBA::fetch($contacts)) {
                        Contact::remove($contact["id"]);
                }
 
-               dba::delete('gcontact', ['addr' => $author]);
+               DBA::delete('gcontact', ['addr' => $author]);
 
                logger('Removed contacts for ' . $author);
 
@@ -1588,20 +1589,16 @@ class Diaspora
        private static function getUriFromGuid($author, $guid, $onlyfound = false)
        {
                $item = Item::selectFirst(['uri'], ['guid' => $guid]);
-               if (DBM::is_result($item)) {
+               if (DBA::isResult($item)) {
                        return $item["uri"];
                } elseif (!$onlyfound) {
-                       $contact = Contact::getDetailsByAddr($author, 0);
-                       if (!empty($contact['network'])) {
-                               $prefix = 'urn:X-' . $contact['network'] . ':';
-                       } else {
-                               // This fallback should happen most unlikely
-                               $prefix = 'urn:X-dspr:';
-                       }
+                       $person = self::personByHandle($author);
 
-                       $author_parts = explode('@', $author);
+                       $parts = parse_url($person['url']);
+                       unset($parts['path']);
+                       $host_url = Network::unparseURL($parts);
 
-                       return $prefix . $author_parts[1] . ':' . $author_parts[0] . ':'. $guid;
+                       return $host_url . '/objects/' . $guid;
                }
 
                return "";
@@ -1618,7 +1615,7 @@ class Diaspora
        private static function getGuidFromUri($uri, $uid)
        {
                $item = Item::selectFirst(['guid'], ['uri' => $uri, 'uid' => $uid]);
-               if (DBM::is_result($item)) {
+               if (DBA::isResult($item)) {
                        return $item["guid"];
                } else {
                        return false;
@@ -1635,10 +1632,10 @@ class Diaspora
        private static function importerForGuid($guid)
        {
                $item = Item::selectFirst(['uid'], ['origin' => true, 'guid' => $guid]);
-               if (DBM::is_result($item)) {
+               if (DBA::isResult($item)) {
                        logger("Found user ".$item['uid']." as owner of item ".$guid, LOGGER_DEBUG);
-                       $contact = dba::selectFirst('contact', [], ['self' => true, 'uid' => $item['uid']]);
-                       if (DBM::is_result($contact)) {
+                       $contact = DBA::selectFirst('contact', [], ['self' => true, 'uid' => $item['uid']]);
+                       if (DBA::isResult($contact)) {
                                return $contact;
                        }
                }
@@ -1655,7 +1652,7 @@ class Diaspora
         *
         * @return int The message id of the generated comment or "false" if there was an error
         */
-       private static function receiveComment($importer, $sender, $data, $xml)
+       private static function receiveComment(array $importer, $sender, $data, $xml)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
@@ -1714,7 +1711,6 @@ class Diaspora
                $datarray["guid"] = $guid;
                $datarray["uri"] = self::getUriFromGuid($author, $guid);
 
-               $datarray["type"] = "remote-comment";
                $datarray["verb"] = ACTIVITY_POST;
                $datarray["gravity"] = GRAVITY_COMMENT;
 
@@ -1726,7 +1722,7 @@ class Diaspora
 
                $datarray["object-type"] = ACTIVITY_OBJ_COMMENT;
 
-               $datarray["protocol"] = PROTOCOL_DIASPORA;
+               $datarray["protocol"] = Conversation::PARCEL_DIASPORA;
                $datarray["source"] = $xml;
 
                $datarray["changed"] = $datarray["created"] = $datarray["edited"] = $created_at;
@@ -1773,7 +1769,7 @@ class Diaspora
         *
         * @return bool "true" if it was successful
         */
-       private static function receiveConversationMessage($importer, $contact, $data, $msg, $mesg, $conversation)
+       private static function receiveConversationMessage(array $importer, array $contact, $data, $msg, $mesg, $conversation)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
@@ -1804,14 +1800,9 @@ class Diaspora
 
                $person = self::personByHandle($msg_author);
 
-               dba::lock('mail');
+               DBA::lock('mail');
 
-               $r = q(
-                       "SELECT `id` FROM `mail` WHERE `guid` = '%s' AND `uid` = %d LIMIT 1",
-                       dbesc($msg_guid),
-                       intval($importer["uid"])
-               );
-               if (DBM::is_result($r)) {
+               if (DBA::exists('mail', ['guid' => $msg_guid, 'uid' => $importer["uid"]])) {
                        logger("duplicate message already delivered.", LOGGER_DEBUG);
                        return false;
                }
@@ -1820,24 +1811,24 @@ class Diaspora
                        "INSERT INTO `mail` (`uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`)
                        VALUES (%d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
                        intval($importer["uid"]),
-                       dbesc($msg_guid),
+                       DBA::escape($msg_guid),
                        intval($conversation["id"]),
-                       dbesc($person["name"]),
-                       dbesc($person["photo"]),
-                       dbesc($person["url"]),
+                       DBA::escape($person["name"]),
+                       DBA::escape($person["photo"]),
+                       DBA::escape($person["url"]),
                        intval($contact["id"]),
-                       dbesc($subject),
-                       dbesc($body),
+                       DBA::escape($subject),
+                       DBA::escape($body),
                        0,
                        0,
-                       dbesc($message_uri),
-                       dbesc($author.":".$guid),
-                       dbesc($msg_created_at)
+                       DBA::escape($message_uri),
+                       DBA::escape($author.":".$guid),
+                       DBA::escape($msg_created_at)
                );
 
-               dba::unlock();
+               DBA::unlock();
 
-               dba::update('conv', ['updated' => DateTimeFormat::utcNow()], ['id' => $conversation["id"]]);
+               DBA::update('conv', ['updated' => DateTimeFormat::utcNow()], ['id' => $conversation["id"]]);
 
                notification(
                        [
@@ -1847,10 +1838,10 @@ class Diaspora
                        "to_name" => $importer["username"],
                        "to_email" => $importer["email"],
                        "uid" =>$importer["uid"],
-                       "item" => ["subject" => $subject, "body" => $body],
+                       "item" => ["id" => $conversation["id"], "title" => $subject, "subject" => $subject, "body" => $body],
                        "source_name" => $person["name"],
                        "source_link" => $person["url"],
-                       "source_photo" => $person["thumb"],
+                       "source_photo" => $person["photo"],
                        "verb" => ACTIVITY_POST,
                        "otype" => "mail"]
                );
@@ -1866,7 +1857,7 @@ class Diaspora
         *
         * @return bool Success
         */
-       private static function receiveConversation($importer, $msg, $data)
+       private static function receiveConversation(array $importer, $msg, $data)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
@@ -1886,37 +1877,21 @@ class Diaspora
                        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 {
+               $conversation = DBA::selectFirst('conv', [], ['uid' => $importer["uid"], 'guid' => $guid]);
+               if (!DBA::isResult($conversation)) {
                        $r = q(
                                "INSERT INTO `conv` (`uid`, `guid`, `creator`, `created`, `updated`, `subject`, `recips`)
                                VALUES (%d, '%s', '%s', '%s', '%s', '%s', '%s')",
                                intval($importer["uid"]),
-                               dbesc($guid),
-                               dbesc($author),
-                               dbesc($created_at),
-                               dbesc(DateTimeFormat::utcNow()),
-                               dbesc($subject),
-                               dbesc($participants)
+                               DBA::escape($guid),
+                               DBA::escape($author),
+                               DBA::escape($created_at),
+                               DBA::escape(DateTimeFormat::utcNow()),
+                               DBA::escape($subject),
+                               DBA::escape($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];
+                               $conversation = DBA::selectFirst('conv', [], ['uid' => $importer["uid"], 'guid' => $guid]);
                        }
                }
                if (!$conversation) {
@@ -1931,50 +1906,6 @@ class Diaspora
                return true;
        }
 
-       /**
-        * @brief Creates the body for a "like" message
-        *
-        * @param array  $contact     The contact that send us the "like"
-        * @param array  $parent_item The item array of the parent item
-        * @param string $guid        message guid
-        *
-        * @return string the body
-        */
-       private static function constructLikeBody($contact, $parent_item, $guid)
-       {
-               $bodyverb = L10n::t('%1$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]";
-               $plink = "[url=".System::baseUrl()."/display/".urlencode($guid)."]".L10n::t("status")."[/url]";
-
-               return sprintf($bodyverb, $ulink, $alink, $plink);
-       }
-
-       /**
-        * @brief Creates a XML object for a "like"
-        *
-        * @param array $importer    Array of the importer user
-        * @param array $parent_item The item array of the parent item
-        *
-        * @return string The XML
-        */
-       private static function constructLikeObject($importer, $parent_item)
-       {
-               $objtype = ACTIVITY_OBJ_NOTE;
-               $link = '<link rel="alternate" type="text/html" href="'.System::baseUrl()."/display/".$importer["nickname"]."/".$parent_item["id"].'" />';
-               $parent_body = $parent_item["body"];
-
-               $xmldata = ["object" => ["type" => $objtype,
-                                               "local" => "1",
-                                               "id" => $parent_item["uri"],
-                                               "link" => $link,
-                                               "title" => "",
-                                               "content" => $parent_body]];
-
-               return XML::fromArray($xmldata, $xml, true);
-       }
-
        /**
         * @brief Processes "like" messages
         *
@@ -1984,7 +1915,7 @@ class Diaspora
         *
         * @return int The message id of the generated like or "false" if there was an error
         */
-       private static function receiveLike($importer, $sender, $data)
+       private static function receiveLike(array $importer, $sender, $data)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
@@ -2032,30 +1963,28 @@ class Diaspora
 
                $datarray = [];
 
-               $datarray["protocol"] = PROTOCOL_DIASPORA;
+               $datarray["protocol"] = Conversation::PARCEL_DIASPORA;
 
                $datarray["uid"] = $importer["uid"];
                $datarray["contact-id"] = $author_contact["cid"];
                $datarray["network"]  = $author_contact["network"];
 
-               $datarray["author-link"] = $person["url"];
-               $datarray["author-id"] = Contact::getIdForURL($person["url"], 0);
-
-               $datarray["owner-link"] = $contact["url"];
-               $datarray["owner-id"] = Contact::getIdForURL($contact["url"], 0);
+               $datarray["owner-link"] = $datarray["author-link"] = $person["url"];
+               $datarray["owner-id"] = $datarray["author-id"] = Contact::getIdForURL($person["url"], 0);
 
                $datarray["guid"] = $guid;
                $datarray["uri"] = self::getUriFromGuid($author, $guid);
 
-               $datarray["type"] = "activity";
                $datarray["verb"] = $verb;
                $datarray["gravity"] = GRAVITY_ACTIVITY;
                $datarray["parent-uri"] = $parent_item["uri"];
 
                $datarray["object-type"] = ACTIVITY_OBJ_NOTE;
-               $datarray["object"] = self::constructLikeObject($importer, $parent_item);
 
-               $datarray["body"] = self::constructLikeBody($contact, $parent_item, $guid);
+               $datarray["body"] = $verb;
+
+               // Diaspora doesn't provide a date for likes
+               $datarray["changed"] = $datarray["created"] = $datarray["edited"] = DateTimeFormat::utcNow();
 
                // like on comments have the comment as parent. So we need to fetch the toplevel parent
                if ($parent_item["id"] != $parent_item["parent"]) {
@@ -2095,7 +2024,7 @@ class Diaspora
         *
         * @return bool Success?
         */
-       private static function receiveMessage($importer, $data)
+       private static function receiveMessage(array $importer, $data)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
@@ -2110,14 +2039,10 @@ class Diaspora
 
                $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 {
+               $condition = ['uid' => $importer["uid"], 'guid' => $conversation_guid];
+               $conversation = DBA::selectFirst('conv', [], $condition);
+
+               if (!DBA::isResult($conversation)) {
                        logger("conversation not available.");
                        return false;
                }
@@ -2134,14 +2059,9 @@ class Diaspora
 
                $body = self::replacePeopleGuid($body, $person["url"]);
 
-               dba::lock('mail');
+               DBA::lock('mail');
 
-               $r = q(
-                       "SELECT `id` FROM `mail` WHERE `guid` = '%s' AND `uid` = %d LIMIT 1",
-                       dbesc($guid),
-                       intval($importer["uid"])
-               );
-               if (DBM::is_result($r)) {
+               if (DBA::exists('mail', ['guid' => $guid, 'uid' => $importer["uid"]])) {
                        logger("duplicate message already delivered.", LOGGER_DEBUG);
                        return false;
                }
@@ -2150,24 +2070,24 @@ class Diaspora
                        "INSERT INTO `mail` (`uid`, `guid`, `convid`, `from-name`,`from-photo`,`from-url`,`contact-id`,`title`,`body`,`seen`,`reply`,`uri`,`parent-uri`,`created`)
                                VALUES ( %d, '%s', %d, '%s', '%s', '%s', %d, '%s', '%s', %d, %d, '%s','%s','%s')",
                        intval($importer["uid"]),
-                       dbesc($guid),
+                       DBA::escape($guid),
                        intval($conversation["id"]),
-                       dbesc($person["name"]),
-                       dbesc($person["photo"]),
-                       dbesc($person["url"]),
+                       DBA::escape($person["name"]),
+                       DBA::escape($person["photo"]),
+                       DBA::escape($person["url"]),
                        intval($contact["id"]),
-                       dbesc($conversation["subject"]),
-                       dbesc($body),
+                       DBA::escape($conversation["subject"]),
+                       DBA::escape($body),
                        0,
                        1,
-                       dbesc($message_uri),
-                       dbesc($author.":".$conversation["guid"]),
-                       dbesc($created_at)
+                       DBA::escape($message_uri),
+                       DBA::escape($author.":".$conversation["guid"]),
+                       DBA::escape($created_at)
                );
 
-               dba::unlock();
+               DBA::unlock();
 
-               dba::update('conv', ['updated' => DateTimeFormat::utcNow()], ['id' => $conversation["id"]]);
+               DBA::update('conv', ['updated' => DateTimeFormat::utcNow()], ['id' => $conversation["id"]]);
                return true;
        }
 
@@ -2179,7 +2099,7 @@ class Diaspora
         *
         * @return bool always true
         */
-       private static function receiveParticipation($importer, $data)
+       private static function receiveParticipation(array $importer, $data)
        {
                $author = strtolower(notags(unxmlify($data->author)));
                $parent_guid = notags(unxmlify($data->parent_guid));
@@ -2197,7 +2117,7 @@ class Diaspora
                }
 
                $item = Item::selectFirst(['id'], ['guid' => $parent_guid, 'origin' => true, 'private' => false]);
-               if (!DBM::is_result($item)) {
+               if (!DBA::isResult($item)) {
                        logger('Item not found, no origin or private: '.$parent_guid);
                        return false;
                }
@@ -2212,12 +2132,12 @@ class Diaspora
 
                logger('Received participation for ID: '.$item['id'].' - Contact: '.$contact_id.' - Server: '.$server, LOGGER_DEBUG);
 
-               if (!dba::exists('participation', ['iid' => $item['id'], 'server' => $server])) {
-                       dba::insert('participation', ['iid' => $item['id'], 'cid' => $contact_id, 'fid' => $person['id'], 'server' => $server]);
+               if (!DBA::exists('participation', ['iid' => $item['id'], 'server' => $server])) {
+                       DBA::insert('participation', ['iid' => $item['id'], 'cid' => $contact_id, 'fid' => $person['id'], 'server' => $server]);
                }
 
                // Send all existing comments and likes to the requesting server
-               $comments = Item::select(['id', 'verb', 'self'], ['parent' => $item['id']]);
+               $comments = Item::select(['id', 'parent', 'verb', 'self'], ['parent' => $item['id']]);
                while ($comment = Item::fetch($comments)) {
                        if ($comment['id'] == $comment['parent']) {
                                continue;
@@ -2230,7 +2150,7 @@ class Diaspora
                        logger("Send ".$cmd." for item ".$comment['id']." to contact ".$contact_id, LOGGER_DEBUG);
                        Worker::add(PRIORITY_HIGH, 'Delivery', $cmd, $comment['id'], $contact_id);
                }
-               dba::close($comments);
+               DBA::close($comments);
 
                return true;
        }
@@ -2243,7 +2163,7 @@ class Diaspora
         *
         * @return bool always true
         */
-       private static function receivePhoto($importer, $data)
+       private static function receivePhoto(array $importer, $data)
        {
                // There doesn't seem to be a reason for this function,
                // since the photo data is transmitted in the status message as well
@@ -2258,7 +2178,7 @@ class Diaspora
         *
         * @return bool always true
         */
-       private static function receivePollParticipation($importer, $data)
+       private static function receivePollParticipation(array $importer, $data)
        {
                // We don't support polls by now
                return true;
@@ -2272,7 +2192,7 @@ class Diaspora
         *
         * @return bool Success
         */
-       private static function receiveProfile($importer, $data)
+       private static function receiveProfile(array $importer, $data)
        {
                $author = strtolower(notags(unxmlify($data->author)));
 
@@ -2341,9 +2261,9 @@ class Diaspora
                        $fields['bd'] = $birthday;
                }
 
-               dba::update('contact', $fields, ['id' => $contact['id']]);
+               DBA::update('contact', $fields, ['id' => $contact['id']]);
 
-               $gcontact = ["url" => $contact["url"], "network" => NETWORK_DIASPORA, "generation" => 2,
+               $gcontact = ["url" => $contact["url"], "network" => Protocol::DIASPORA, "generation" => 2,
                                        "photo" => $image_url, "name" => $name, "location" => $location,
                                        "about" => $about, "birthday" => $birthday, "gender" => $gender,
                                        "addr" => $author, "nick" => $nick, "keywords" => $keywords,
@@ -2365,14 +2285,14 @@ class Diaspora
         * @param array $contact  The contact that send the request
         * @return void
         */
-       private static function receiveRequestMakeFriend($importer, $contact)
+       private static function receiveRequestMakeFriend(array $importer, array $contact)
        {
                $a = get_app();
 
-               if ($contact["rel"] == CONTACT_IS_SHARING) {
-                       dba::update(
+               if ($contact["rel"] == Contact::SHARING) {
+                       DBA::update(
                                'contact',
-                               ['rel' => CONTACT_IS_FRIEND, 'writable' => true],
+                               ['rel' => Contact::FRIEND, 'writable' => true],
                                ['id' => $contact["id"], 'uid' => $importer["uid"]]
                        );
                }
@@ -2386,7 +2306,7 @@ class Diaspora
         *
         * @return bool Success
         */
-       private static function receiveContactRequest($importer, $data)
+       private static function receiveContactRequest(array $importer, $data)
        {
                $author = unxmlify($data->author);
                $recipient = unxmlify($data->recipient);
@@ -2423,11 +2343,11 @@ class Diaspora
 
                                // If we are now friends, we are sending a share message.
                                // Normally we needn't to do so, but the first message could have been vanished.
-                               if (in_array($contact["rel"], [CONTACT_IS_FRIEND])) {
-                                       $u = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", intval($importer["uid"]));
-                                       if ($u) {
+                               if (in_array($contact["rel"], [Contact::FRIEND])) {
+                                       $user = DBA::selectFirst('user', [], ['uid' => $importer["uid"]]);
+                                       if (DBA::isResult($user)) {
                                                logger("Sending share message to author ".$author." - Contact: ".$contact["id"]." - User: ".$importer["uid"], LOGGER_DEBUG);
-                                               $ret = self::sendShare($u[0], $contact);
+                                               $ret = self::sendShare($user, $contact);
                                        }
                                }
                                return true;
@@ -2438,7 +2358,7 @@ class Diaspora
                        }
                }
 
-               if (!$following && $sharing && in_array($importer["page-flags"], [PAGE_SOAPBOX, PAGE_NORMAL])) {
+               if (!$following && $sharing && in_array($importer["page-flags"], [Contact::PAGE_SOAPBOX, Contact::PAGE_NORMAL])) {
                        logger("Author ".$author." wants to share with us - but doesn't want to listen. Request is ignored.", LOGGER_DEBUG);
                        return false;
                } elseif (!$following && !$sharing) {
@@ -2454,7 +2374,7 @@ class Diaspora
 
                $ret = self::personByHandle($author);
 
-               if (!$ret || ($ret["network"] != NETWORK_DIASPORA)) {
+               if (!$ret || ($ret["network"] != Protocol::DIASPORA)) {
                        logger("Cannot resolve diaspora handle ".$author." for ".$recipient);
                        return false;
                }
@@ -2465,18 +2385,18 @@ class Diaspora
                        "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($ret["addr"]),
+                       DBA::escape($ret["network"]),
+                       DBA::escape($ret["addr"]),
                        DateTimeFormat::utcNow(),
-                       dbesc($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"]),
+                       DBA::escape($ret["url"]),
+                       DBA::escape(normalise_link($ret["url"])),
+                       DBA::escape($batch),
+                       DBA::escape($ret["name"]),
+                       DBA::escape($ret["nick"]),
+                       DBA::escape($ret["photo"]),
+                       DBA::escape($ret["pubkey"]),
+                       DBA::escape($ret["notify"]),
+                       DBA::escape($ret["poll"]),
                        1,
                        2
                );
@@ -2496,7 +2416,7 @@ class Diaspora
 
                Contact::updateAvatar($ret["photo"], $importer['uid'], $contact_record["id"], true);
 
-               if (in_array($importer["page-flags"], [PAGE_NORMAL, PAGE_PRVGROUP])) {
+               if (in_array($importer["page-flags"], [Contact::PAGE_NORMAL, Contact::PAGE_PRVGROUP])) {
                        logger("Sending intra message for author ".$author.".", LOGGER_DEBUG);
 
                        $hash = random_string().(string)time();   // Generate a confirm_key
@@ -2508,9 +2428,9 @@ class Diaspora
                                intval($contact_record["id"]),
                                0,
                                0,
-                               dbesc(L10n::t("Sharing notification from Diaspora network")),
-                               dbesc($hash),
-                               dbesc(DateTimeFormat::utcNow())
+                               DBA::escape(L10n::t("Sharing notification from Diaspora network")),
+                               DBA::escape($hash),
+                               DBA::escape(DateTimeFormat::utcNow())
                        );
                } else {
                        // automatic friend approval
@@ -2519,16 +2439,17 @@ class Diaspora
 
                        Contact::updateAvatar($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) && $sharing && $following) {
-                               $new_relation = CONTACT_IS_FRIEND;
-                       } elseif (($importer["page-flags"] == PAGE_FREELOVE) && $sharing) {
-                               $new_relation = CONTACT_IS_SHARING;
+                       /*
+                        * technically they are sharing with us (Contact::SHARING),
+                        * but if our page-type is Profile::PAGE_COMMUNITY or Profile::PAGE_SOAPBOX
+                        * we are going to change the relationship and make them a follower.
+                        */
+                       if (($importer["page-flags"] == Contact::PAGE_FREELOVE) && $sharing && $following) {
+                               $new_relation = Contact::FRIEND;
+                       } elseif (($importer["page-flags"] == Contact::PAGE_FREELOVE) && $sharing) {
+                               $new_relation = Contact::SHARING;
                        } else {
-                               $new_relation = CONTACT_IS_FOLLOWER;
+                               $new_relation = Contact::FOLLOWER;
                        }
 
                        $r = q(
@@ -2541,15 +2462,15 @@ class Diaspora
                                WHERE `id` = %d
                                ",
                                intval($new_relation),
-                               dbesc(DateTimeFormat::utcNow()),
-                               dbesc(DateTimeFormat::utcNow()),
+                               DBA::escape(DateTimeFormat::utcNow()),
+                               DBA::escape(DateTimeFormat::utcNow()),
                                intval($contact_record["id"])
                        );
 
-                       $u = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", intval($importer["uid"]));
-                       if ($u) {
+                       $user = DBA::selectFirst('user', [], ['uid' => $importer["uid"]]);
+                       if (DBA::isResult($user)) {
                                logger("Sending share message (Relation: ".$new_relation.") to author ".$author." - Contact: ".$contact_record["id"]." - User: ".$importer["uid"], LOGGER_DEBUG);
-                               $ret = self::sendShare($u[0], $contact_record);
+                               $ret = self::sendShare($user, $contact_record);
 
                                // Send the profile data, maybe it weren't transmitted before
                                self::sendProfile($importer["uid"], [$contact_record]);
@@ -2581,7 +2502,7 @@ class Diaspora
                $condition = ['guid' => $guid, 'visible' => true, 'deleted' => false, 'private' => false];
                $item = Item::selectFirst($fields, $condition);
 
-               if (DBM::is_result($item)) {
+               if (DBA::isResult($item)) {
                        logger("reshared message ".$guid." already exists on system.");
 
                        // Maybe it is already a reshared item?
@@ -2603,7 +2524,7 @@ class Diaspora
                        }
                }
 
-               if (!DBM::is_result($item)) {
+               if (!DBA::isResult($item)) {
                        if (empty($orig_author)) {
                                logger('Empty author for guid ' . $guid . '. Quitting.');
                                return false;
@@ -2625,7 +2546,7 @@ class Diaspora
                                $condition = ['guid' => $guid, 'visible' => true, 'deleted' => false, 'private' => false];
                                $item = Item::selectFirst($fields, $condition);
 
-                               if (DBM::is_result($item)) {
+                               if (DBA::isResult($item)) {
                                        // If it is a reshared post from another network then reformat to avoid display problems with two share elements
                                        if (self::isReshare($item["body"], false)) {
                                                $item["body"] = Markdown::toBBCode(BBCode::toMarkdown($item["body"]));
@@ -2648,7 +2569,7 @@ class Diaspora
         *
         * @return int the message id
         */
-       private static function receiveReshare($importer, $data, $xml)
+       private static function receiveReshare(array $importer, $data, $xml)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
@@ -2679,7 +2600,7 @@ class Diaspora
 
                $datarray["uid"] = $importer["uid"];
                $datarray["contact-id"] = $contact["id"];
-               $datarray["network"]  = NETWORK_DIASPORA;
+               $datarray["network"]  = Protocol::DIASPORA;
 
                $datarray["author-link"] = $contact["url"];
                $datarray["author-id"] = Contact::getIdForURL($contact["url"], 0);
@@ -2693,7 +2614,7 @@ class Diaspora
                $datarray["verb"] = ACTIVITY_POST;
                $datarray["gravity"] = GRAVITY_PARENT;
 
-               $datarray["protocol"] = PROTOCOL_DIASPORA;
+               $datarray["protocol"] = Conversation::PARCEL_DIASPORA;
                $datarray["source"] = $xml;
 
                $prefix = share_header(
@@ -2740,7 +2661,7 @@ class Diaspora
         *
         * @return bool success
         */
-       private static function itemRetraction($importer, $contact, $data)
+       private static function itemRetraction(array $importer, array $contact, $data)
        {
                $author = notags(unxmlify($data->author));
                $target_guid = notags(unxmlify($data->target_guid));
@@ -2757,21 +2678,27 @@ class Diaspora
                }
 
                // Fetch items that are about to be deleted
-               $fields = ['uid', 'id', 'parent', 'parent-uri', 'author-link'];
+               $fields = ['uid', 'id', 'parent', 'parent-uri', 'author-link', 'file'];
 
                // When we receive a public retraction, we delete every item that we find.
                if ($importer['uid'] == 0) {
-                       $condition = ["`guid` = ? AND NOT `file` LIKE '%%[%%' AND NOT `deleted`", $target_guid];
+                       $condition = ['guid' => $target_guid, 'deleted' => false];
                } else {
-                       $condition = ["`guid` = ? AND `uid` = ? AND NOT `file` LIKE '%%[%%' AND NOT `deleted`", $target_guid, $importer['uid']];
+                       $condition = ['guid' => $target_guid, 'deleted' => false, 'uid' => $importer['uid']];
                }
+
                $r = Item::select($fields, $condition);
-               if (!DBM::is_result($r)) {
+               if (!DBA::isResult($r)) {
                        logger("Target guid ".$target_guid." was not found on this system for user ".$importer['uid'].".");
                        return false;
                }
 
                while ($item = Item::fetch($r)) {
+                       if (strstr($item['file'], '[')) {
+                               logger("Target guid " . $target_guid . " for user " . $item['uid'] . " is filed. So it won't be deleted.", LOGGER_DEBUG);
+                               continue;
+                       }
+
                        // Fetch the parent item
                        $parent = Item::selectFirst(['author-link'], ['id' => $item["parent"]]);
 
@@ -2798,7 +2725,7 @@ class Diaspora
         *
         * @return bool Success
         */
-       private static function receiveRetraction($importer, $sender, $data)
+       private static function receiveRetraction(array $importer, $sender, $data)
        {
                $target_type = notags(unxmlify($data->target_type));
 
@@ -2808,6 +2735,10 @@ class Diaspora
                        return false;
                }
 
+               if (!$contact) {
+                       $contact = [];
+               }
+
                logger("Got retraction for ".$target_type.", sender ".$sender." and user ".$importer["uid"], LOGGER_DEBUG);
 
                switch ($target_type) {
@@ -2839,7 +2770,7 @@ class Diaspora
         *
         * @return int The message id of the newly created item
         */
-       private static function receiveStatusMessage($importer, $data, $xml)
+       private static function receiveStatusMessage(array $importer, SimpleXMLElement $data, $xml)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
@@ -2897,7 +2828,7 @@ class Diaspora
 
                $datarray["uid"] = $importer["uid"];
                $datarray["contact-id"] = $contact["id"];
-               $datarray["network"] = NETWORK_DIASPORA;
+               $datarray["network"] = Protocol::DIASPORA;
 
                $datarray["author-link"] = $contact["url"];
                $datarray["author-id"] = Contact::getIdForURL($contact["url"], 0);
@@ -2911,7 +2842,7 @@ class Diaspora
                $datarray["verb"] = ACTIVITY_POST;
                $datarray["gravity"] = GRAVITY_PARENT;
 
-               $datarray["protocol"] = PROTOCOL_DIASPORA;
+               $datarray["protocol"] = Conversation::PARCEL_DIASPORA;
                $datarray["source"] = $xml;
 
                $datarray["body"] = self::replacePeopleGuid($body, $contact["url"]);
@@ -2959,9 +2890,9 @@ class Diaspora
         *
         * @return string the handle in the format user@domain.tld
         */
-       private static function myHandle($contact)
+       private static function myHandle(array $contact)
        {
-               if ($contact["addr"] != "") {
+               if (!empty($contact["addr"])) {
                        return $contact["addr"];
                }
 
@@ -2973,7 +2904,7 @@ class Diaspora
                        $nick = $contact["nick"];
                }
 
-               return $nick."@".substr(System::baseUrl(), strpos(System::baseUrl(), "://") + 3);
+               return $nick . "@" . substr(System::baseUrl(), strpos(System::baseUrl(), "://") + 3);
        }
 
 
@@ -2988,7 +2919,7 @@ class Diaspora
         *
         * @return string The encrypted data
         */
-       public static function encodePrivateData($msg, $user, $contact, $prvkey, $pubkey)
+       public static function encodePrivateData($msg, array $user, array $contact, $prvkey, $pubkey)
        {
                logger("Message: ".$msg, LOGGER_DATA);
 
@@ -3026,7 +2957,7 @@ class Diaspora
         *
         * @return string The envelope
         */
-       public static function buildMagicEnvelope($msg, $user)
+       public static function buildMagicEnvelope($msg, array $user)
        {
                $b64url_data = base64url_encode($msg);
                $data = str_replace(["\n", "\r", " ", "\t"], ["", "", "", ""], $b64url_data);
@@ -3069,7 +3000,7 @@ class Diaspora
         *
         * @return string The message that will be transmitted to other servers
         */
-       public static function buildMessage($msg, $user, $contact, $prvkey, $pubkey, $public = false)
+       public static function buildMessage($msg, array $user, array $contact, $prvkey, $pubkey, $public = false)
        {
                // The message is put into an envelope with the sender's signature
                $envelope = self::buildMagicEnvelope($msg, $user);
@@ -3113,7 +3044,7 @@ class Diaspora
         *
         * @return int Result of the transmission
         */
-       public static function transmit($owner, $contact, $envelope, $public_batch, $queue_run = false, $guid = "", $no_queue = false)
+       public static function transmit(array $owner, array $contact, $envelope, $public_batch, $queue_run = false, $guid = "", $no_queue = false)
        {
                $a = get_app();
 
@@ -3159,10 +3090,10 @@ class Diaspora
                logger("transmit: ".$logid."-".$guid." to ".$dest_url." returns: ".$return_code);
 
                if (!$return_code || (($return_code == 503) && (stristr($a->get_curl_headers(), "retry-after")))) {
-                       if (!$no_queue && ($contact['contact-type'] != ACCOUNT_TYPE_RELAY)) {
+                       if (!$no_queue && !empty($contact['contact-type']) && ($contact['contact-type'] != Contact::ACCOUNT_TYPE_RELAY)) {
                                logger("queue message");
                                // queue message for redelivery
-                               Queue::add($contact["id"], NETWORK_DIASPORA, $envelope, $public_batch, $guid);
+                               Queue::add($contact["id"], Protocol::DIASPORA, $envelope, $public_batch, $guid);
                        }
 
                        // The message could not be delivered. We mark the contact as "dead"
@@ -3204,7 +3135,7 @@ class Diaspora
         *
         * @return int Result of the transmission
         */
-       private static function buildAndTransmit($owner, $contact, $type, $message, $public_batch = false, $guid = "", $spool = false)
+       private static function buildAndTransmit(array $owner, array $contact, $type, $message, $public_batch = false, $guid = "", $spool = false)
        {
                $msg = self::buildPostXml($type, $message);
 
@@ -3212,14 +3143,14 @@ class Diaspora
                logger('send guid '.$guid, LOGGER_DEBUG);
 
                // Fallback if the private key wasn't transmitted in the expected field
-               if ($owner['uprvkey'] == "") {
+               if (empty($owner['uprvkey'])) {
                        $owner['uprvkey'] = $owner['prvkey'];
                }
 
                $envelope = self::buildMessage($msg, $owner, $contact, $owner['uprvkey'], $contact['pubkey'], $public_batch);
 
                if ($spool) {
-                       Queue::add($contact['id'], NETWORK_DIASPORA, $envelope, $public_batch, $guid);
+                       Queue::add($contact['id'], Protocol::DIASPORA, $envelope, $public_batch, $guid);
                        return true;
                } else {
                        $return_code = self::transmit($owner, $contact, $envelope, $public_batch, false, $guid);
@@ -3238,7 +3169,7 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       private static function sendParticipation($contact, $item)
+       private static function sendParticipation(array $contact, array $item)
        {
                // Don't send notifications for private postings
                if ($item['private']) {
@@ -3257,7 +3188,7 @@ class Diaspora
                // If the item belongs to a user, we take this user id.
                if ($item['uid'] == 0) {
                        $condition = ['verified' => true, 'blocked' => false, 'account_removed' => false, 'account_expired' => false];
-                       $first_user = dba::selectFirst('user', ['uid'], $condition);
+                       $first_user = DBA::selectFirst('user', ['uid'], $condition);
                        $owner = User::getOwnerDataById($first_user['uid']);
                } else {
                        $owner = User::getOwnerDataById($item['uid']);
@@ -3266,7 +3197,7 @@ class Diaspora
                $author = self::myHandle($owner);
 
                $message = ["author" => $author,
-                               "guid" => get_guid(32),
+                               "guid" => System::createUUID(),
                                "parent_type" => "Post",
                                "parent_guid" => $item["guid"]];
 
@@ -3287,7 +3218,7 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function sendAccountMigration($owner, $contact, $uid)
+       public static function sendAccountMigration(array $owner, array $contact, $uid)
        {
                $old_handle = PConfig::get($uid, 'system', 'previous_addr');
                $profile = self::createProfileData($uid);
@@ -3312,7 +3243,7 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function sendShare($owner, $contact)
+       public static function sendShare(array $owner, array $contact)
        {
                /**
                 * @todo support the different possible combinations of "following" and "sharing"
@@ -3323,13 +3254,15 @@ class Diaspora
 
                /*
                switch ($contact["rel"]) {
-                       case CONTACT_IS_FRIEND:
+                       case Contact::FRIEND:
                                $following = true;
                                $sharing = true;
-                       case CONTACT_IS_SHARING:
+
+                       case Contact::SHARING:
                                $following = false;
                                $sharing = true;
-                       case CONTACT_IS_FOLLOWER:
+
+                       case Contact::FOLLOWER:
                                $following = true;
                                $sharing = false;
                }
@@ -3353,7 +3286,7 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function sendUnshare($owner, $contact)
+       public static function sendUnshare(array $owner, array $contact)
        {
                $message = ["author" => self::myHandle($owner),
                                "recipient" => $contact["addr"],
@@ -3398,19 +3331,19 @@ class Diaspora
 
                $guid = "";
                preg_match("/guid='(.*?)'/ism", $attributes, $matches);
-               if ($matches[1] != "") {
+               if (!empty($matches[1])) {
                        $guid = $matches[1];
                }
 
                preg_match('/guid="(.*?)"/ism', $attributes, $matches);
-               if ($matches[1] != "") {
+               if (!empty($matches[1])) {
                        $guid = $matches[1];
                }
 
                if (($guid != "") && $complete) {
-                       $condition = ['guid' => $guid, 'network' => [NETWORK_DFRN, NETWORK_DIASPORA]];
+                       $condition = ['guid' => $guid, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
                        $item = Item::selectFirst(['contact-id'], $condition);
-                       if (DBM::is_result($item)) {
+                       if (DBA::isResult($item)) {
                                $ret= [];
                                $ret["root_handle"] = self::handleFromContact($item["contact-id"]);
                                $ret["root_guid"] = $guid;
@@ -3428,12 +3361,12 @@ class Diaspora
 
                $profile = "";
                preg_match("/profile='(.*?)'/ism", $attributes, $matches);
-               if ($matches[1] != "") {
+               if (!empty($matches[1])) {
                        $profile = $matches[1];
                }
 
                preg_match('/profile="(.*?)"/ism', $attributes, $matches);
-               if ($matches[1] != "") {
+               if (!empty($matches[1])) {
                        $profile = $matches[1];
                }
 
@@ -3463,7 +3396,7 @@ class Diaspora
        private static function buildEvent($event_id)
        {
                $r = q("SELECT `guid`, `uid`, `start`, `finish`, `nofinish`, `summary`, `desc`, `location`, `adjust` FROM `event` WHERE `id` = %d", intval($event_id));
-               if (!DBM::is_result($r)) {
+               if (!DBA::isResult($r)) {
                        return [];
                }
 
@@ -3472,14 +3405,14 @@ class Diaspora
                $eventdata = [];
 
                $r = q("SELECT `timezone` FROM `user` WHERE `uid` = %d", intval($event['uid']));
-               if (!DBM::is_result($r)) {
+               if (!DBA::isResult($r)) {
                        return [];
                }
 
                $user = $r[0];
 
                $r = q("SELECT `addr`, `nick` FROM `contact` WHERE `uid` = %d AND `self`", intval($event['uid']));
-               if (!DBM::is_result($r)) {
+               if (!DBA::isResult($r)) {
                        return [];
                }
 
@@ -3545,7 +3478,7 @@ class Diaspora
         * 'type' -> Message type ("status_message" or "reshare")
         * 'message' -> Array of XML elements of the status
         */
-       public static function buildStatus($item, $owner)
+       public static function buildStatus(array $item, array $owner)
        {
                $cachekey = "diaspora:buildStatus:".$item['guid'];
 
@@ -3556,7 +3489,7 @@ class Diaspora
 
                $myaddr = self::myHandle($owner);
 
-               $public = (($item["private"]) ? "false" : "true");
+               $public = ($item["private"] ? "false" : "true");
 
                $created = DateTimeFormat::utc($item["created"], DateTimeFormat::ATOM);
 
@@ -3591,7 +3524,7 @@ class Diaspora
 
                        if ($item["attach"]) {
                                $cnt = preg_match_all('/href=\"(.*?)\"(.*?)title=\"(.*?)\"/ism', $item["attach"], $matches, PREG_SET_ORDER);
-                               if (cnt) {
+                               if ($cnt) {
                                        $body .= "\n".L10n::t("Attachments:")."\n";
                                        foreach ($matches as $mtch) {
                                                $body .= "[".$mtch[3]."](".$mtch[1].")\n";
@@ -3659,7 +3592,7 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function sendStatus($item, $owner, $contact, $public_batch = false)
+       public static function sendStatus(array $item, array $owner, array $contact, $public_batch = false)
        {
                $status = self::buildStatus($item, $owner);
 
@@ -3674,10 +3607,10 @@ class Diaspora
         *
         * @return array The data for a "like"
         */
-       private static function constructLike($item, $owner)
+       private static function constructLike(array $item, array $owner)
        {
                $parent = Item::selectFirst(['guid', 'uri', 'parent-uri'], ['uri' => $item["thr-parent"]]);
-               if (!DBM::is_result($parent)) {
+               if (!DBA::isResult($parent)) {
                        return false;
                }
 
@@ -3705,10 +3638,10 @@ class Diaspora
         *
         * @return array The data for an "EventParticipation"
         */
-       private static function constructAttend($item, $owner)
+       private static function constructAttend(array $item, array $owner)
        {
                $parent = Item::selectFirst(['guid', 'uri', 'parent-uri'], ['uri' => $item["thr-parent"]]);
-               if (!DBM::is_result($parent)) {
+               if (!DBA::isResult($parent)) {
                        return false;
                }
 
@@ -3742,7 +3675,7 @@ class Diaspora
         *
         * @return array The data for a comment
         */
-       private static function constructComment($item, $owner)
+       private static function constructComment(array $item, array $owner)
        {
                $cachekey = "diaspora:constructComment:".$item['guid'];
 
@@ -3752,7 +3685,7 @@ class Diaspora
                }
 
                $parent = Item::selectFirst(['guid'], ['id' => $item["parent"], 'parent' => $item["parent"]]);
-               if (!DBM::is_result($parent)) {
+               if (!DBA::isResult($parent)) {
                        return false;
                }
 
@@ -3786,7 +3719,7 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function sendFollowup($item, $owner, $contact, $public_batch = false)
+       public static function sendFollowup(array $item, array $owner, array $contact, $public_batch = false)
        {
                if (in_array($item['verb'], [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE])) {
                        $message = self::constructAttend($item, $owner);
@@ -3816,7 +3749,7 @@ class Diaspora
         *
         * @return string The message
         */
-       private static function messageFromSignature($item, $signature)
+       private static function messageFromSignature(array $item, array $signature)
        {
                // Split the signed text
                $signed_parts = explode(";", $signature['signed_text']);
@@ -3866,7 +3799,7 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function sendRelay($item, $owner, $contact, $public_batch = false)
+       public static function sendRelay(array $item, array $owner, array $contact, $public_batch = false)
        {
                if ($item["deleted"]) {
                        return self::sendRetraction($item, $owner, $contact, $public_batch, true);
@@ -3879,19 +3812,13 @@ class Diaspora
                logger("Got relayable data ".$type." for item ".$item["guid"]." (".$item["id"].")", LOGGER_DEBUG);
 
                // fetch the original signature
-
-               $r = q(
-                       "SELECT `signed_text`, `signature`, `signer` FROM `sign` WHERE `iid` = %d LIMIT 1",
-                       intval($item["id"])
-               );
-
-               if (!$r) {
+               $fields = ['signed_text', 'signature', 'signer'];
+               $signature = DBA::selectFirst('sign', $fields, ['iid' => $item["id"]]);
+               if (!DBA::isResult($signature)) {
                        logger("Couldn't fetch signatur for item ".$item["guid"]." (".$item["id"].")", LOGGER_DEBUG);
                        return false;
                }
 
-               $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'] && $signature['signature'] && $signature['signer']) {
@@ -3936,7 +3863,7 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function sendRetraction($item, $owner, $contact, $public_batch = false, $relay = false)
+       public static function sendRetraction(array $item, array $owner, array $contact, $public_batch = false, $relay = false)
        {
                $itemaddr = self::handleFromContact($item["contact-id"], $item["author-id"]);
 
@@ -3968,21 +3895,15 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function sendMail($item, $owner, $contact)
+       public static function sendMail(array $item, array $owner, array $contact)
        {
                $myaddr = self::myHandle($owner);
 
-               $r = q(
-                       "SELECT * FROM `conv` WHERE `id` = %d AND `uid` = %d LIMIT 1",
-                       intval($item["convid"]),
-                       intval($item["uid"])
-               );
-
-               if (!DBM::is_result($r)) {
+               $cnv = DBA::selectFirst('conv', [], ['id' => $item["convid"], 'uid' => $item["uid"]]);
+               if (!DBA::isResult($cnv)) {
                        logger("conversation not found.");
                        return;
                }
-               $cnv = $r[0];
 
                $conv = [
                        "author" => $cnv["creator"],
@@ -4137,7 +4058,7 @@ class Diaspora
                                $arr = explode(' ', $profile['pub_keywords']);
                                if (count($arr)) {
                                        for ($x = 0; $x < 5; $x ++) {
-                                               if (trim($arr[$x])) {
+                                               if (!empty($arr[$x])) {
                                                        $tags .= '#'. trim($arr[$x]) .' ';
                                                }
                                        }
@@ -4183,9 +4104,9 @@ class Diaspora
                        $recips = q(
                                "SELECT `id`,`name`,`network`,`pubkey`,`notify` FROM `contact` WHERE `network` = '%s'
                                AND `uid` = %d AND `rel` != %d",
-                               dbesc(NETWORK_DIASPORA),
+                               DBA::escape(Protocol::DIASPORA),
                                intval($uid),
-                               intval(CONTACT_IS_SHARING)
+                               intval(Contact::SHARING)
                        );
                }
 
@@ -4209,7 +4130,7 @@ class Diaspora
         *
         * @return bool Success
         */
-       public static function storeLikeSignature($contact, $post_id)
+       public static function storeLikeSignature(array $contact, $post_id)
        {
                // Is the contact the owner? Then fetch the private key
                if (!$contact['self'] || ($contact['uid'] == 0)) {
@@ -4217,15 +4138,15 @@ class Diaspora
                        return false;
                }
 
-               $r = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1", intval($contact['uid']));
-               if (!DBM::is_result($r)) {
+               $user = DBA::selectFirst('user', ['prvkey'], ['uid' => $contact["uid"]]);
+               if (!DBA::isResult($user)) {
                        return false;
                }
 
-               $contact["uprvkey"] = $r[0]['prvkey'];
+               $contact["uprvkey"] = $user['prvkey'];
 
                $item = Item::selectFirst([], ['id' => $post_id]);
-               if (!DBM::is_result($item)) {
+               if (!DBA::isResult($item)) {
                        return false;
                }
 
@@ -4244,7 +4165,7 @@ class Diaspora
                 * Now store the signature more flexible to dynamically support new fields.
                 * This will break Diaspora compatibility with Friendica versions prior to 3.5.
                 */
-               dba::insert('sign', ['iid' => $post_id, 'signed_text' => json_encode($message)]);
+               DBA::insert('sign', ['iid' => $post_id, 'signed_text' => json_encode($message)]);
 
                logger('Stored diaspora like signature');
                return true;
@@ -4260,7 +4181,7 @@ class Diaspora
         *
         * @return bool Success
         */
-       public static function storeCommentSignature($item, $contact, $uprvkey, $message_id)
+       public static function storeCommentSignature(array $item, array $contact, $uprvkey, $message_id)
        {
                if ($uprvkey == "") {
                        logger('No private key, so not storing comment signature', LOGGER_DEBUG);
@@ -4280,7 +4201,7 @@ class Diaspora
                 * Now store the signature more flexible to dynamically support new fields.
                 * This will break Diaspora compatibility with Friendica versions prior to 3.5.
                 */
-               dba::insert('sign', ['iid' => $message_id, 'signed_text' => json_encode($message)]);
+               DBA::insert('sign', ['iid' => $message_id, 'signed_text' => json_encode($message)]);
 
                logger('Stored diaspora comment signature');
                return true;