]> git.mxchange.org Git - friendica.git/blobdiff - src/Protocol/Diaspora.php
Use short form array syntax everywhere
[friendica.git] / src / Protocol / Diaspora.php
index 4d91f8b1c0661946f183676a6e15e567fc1e6c73..f8e4f35c18d62f5d05a3df011ed4280295488312 100644 (file)
@@ -1,6 +1,6 @@
 <?php
 /**
- * @file include/diaspora.php
+ * @file src/Protocol/diaspora.php
  * @brief The implementation of the diaspora protocol
  *
  * The new protocol is described here: http://diaspora.github.io/diaspora_federation/index.html
@@ -16,19 +16,21 @@ use Friendica\Core\Config;
 use Friendica\Core\PConfig;
 use Friendica\Core\Worker;
 use Friendica\Database\DBM;
-use Friendica\Model\GlobalContact;
+use Friendica\Model\Contact;
+use Friendica\Model\GContact;
+use Friendica\Model\Group;
+use Friendica\Model\Profile;
+use Friendica\Model\User;
 use Friendica\Network\Probe;
-use Friendica\Object\Contact;
-use Friendica\Object\Profile;
+use Friendica\Util\Crypto;
 use Friendica\Util\XML;
 
 use dba;
 use SimpleXMLElement;
 
+require_once 'include/dba.php';
 require_once 'include/items.php';
 require_once 'include/bb2diaspora.php';
-require_once 'include/Photo.php';
-require_once 'include/group.php';
 require_once 'include/datetime.php';
 require_once 'include/queue_fn.php';
 
@@ -38,7 +40,6 @@ require_once 'include/queue_fn.php';
  */
 class Diaspora
 {
-
        /**
         * @brief Return a list of relay servers
         *
@@ -50,10 +51,10 @@ class Diaspora
        {
                $serverdata = Config::get("system", "relay_server");
                if ($serverdata == "") {
-                       return array();
+                       return [];
                }
 
-               $relay = array();
+               $relay = [];
 
                $servers = explode(",", $serverdata);
 
@@ -98,6 +99,53 @@ class Diaspora
                return $relay;
        }
 
+       /**
+        * @brief Return a list of participating contacts for a thread
+        *
+        * This is used for the participation feature.
+        * One of the parameters is a contact array.
+        * This is done to avoid duplicates.
+        *
+        * @param integer $thread   The id of the thread
+        * @param array   $contacts The previously fetched contacts
+        *
+        * @return array of relay servers
+        */
+       public static function participantsForThread($thread, $contacts)
+       {
+               $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($r)) {
+                       if (!empty($contact['fnetwork'])) {
+                               $contact['network'] = $contact['fnetwork'];
+                       }
+                       unset($contact['fnetwork']);
+
+                       if (empty($contact['batch']) && !empty($contact['fbatch'])) {
+                               $contact['batch'] = $contact['fbatch'];
+                       }
+                       unset($contact['fbatch']);
+
+                       $exists = false;
+                       foreach ($contacts as $entry) {
+                               if ($entry['batch'] == $contact['batch']) {
+                                       $exists = true;
+                               }
+                       }
+
+                       if (!$exists) {
+                               $contacts[] = $contact;
+                       }
+               }
+               dba::close($r);
+
+               return $contacts;
+       }
+
        /**
         * @brief repairs a signature that was double encoded
         *
@@ -167,13 +215,13 @@ class Diaspora
                }
 
                $b64url_data = base64url_encode($data);
-               $msg = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data);
+               $msg = str_replace(["\n", "\r", " ", "\t"], ["", "", "", ""], $b64url_data);
 
                $signable_data = $msg.".".base64url_encode($type).".".base64url_encode($encoding).".".base64url_encode($alg);
 
                $key = self::key($handle);
 
-               $verify = rsa_verify($signable_data, $sig, $key);
+               $verify = Crypto::rsaVerify($signable_data, $sig, $key);
                if (!$verify) {
                        logger('Message did not verify. Discarding.');
                        return false;
@@ -257,7 +305,7 @@ class Diaspora
                $base = $basedom->children(NAMESPACE_SALMON_ME);
 
                // Not sure if this cleaning is needed
-               $data = str_replace(array(" ", "\t", "\r", "\n"), array("", "", "", ""), $base->data);
+               $data = str_replace([" ", "\t", "\r", "\n"], ["", "", "", ""], $base->data);
 
                // Build the signed data
                $type = $base->data[0]->attributes()->type[0];
@@ -273,15 +321,15 @@ class Diaspora
                $author_addr = base64_decode($key_id);
                $key = self::key($author_addr);
 
-               $verify = rsa_verify($signed_data, $signature, $key);
+               $verify = Crypto::rsaVerify($signed_data, $signature, $key);
                if (!$verify) {
                        logger('Message did not verify. Discarding.');
                        http_status_exit(400);
                }
 
-               return array('message' => (string)base64url_decode($base->data),
+               return ['message' => (string)base64url_decode($base->data),
                                'author' => unxmlify($author_addr),
-                               'key' => (string)$key);
+                               'key' => (string)$key];
        }
 
        /**
@@ -364,7 +412,7 @@ class Diaspora
                // 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);
+               $data = str_replace([" ", "\t", "\r", "\n"], ["", "", "", ""], $base->data);
 
 
                // stash away some other stuff for later
@@ -406,7 +454,7 @@ class Diaspora
                        http_status_exit(400);
                }
 
-               $verify = rsa_verify($signed_data, $signature, $key);
+               $verify = Crypto::rsaVerify($signed_data, $signature, $key);
 
                if (!$verify) {
                        logger('Message did not verify. Discarding.');
@@ -415,9 +463,9 @@ class Diaspora
 
                logger('Message verified.');
 
-               return array('message' => (string)$inner_decrypted,
+               return ['message' => (string)$inner_decrypted,
                                'author' => unxmlify($author_link),
-                               'key' => (string)$key);
+                               'key' => (string)$key];
        }
 
 
@@ -456,11 +504,11 @@ class Diaspora
 
                // Process item retractions. This has to be done separated from the other stuff,
                // since retractions for comments could come even from non followers.
-               if (!empty($fields) && in_array($fields->getName(), array('retraction'))) {
+               if (!empty($fields) && in_array($fields->getName(), ['retraction'])) {
                        $target = notags(unxmlify($fields->target_type));
-                       if (in_array($target, array("Comment", "Like", "Post", "Reshare", "StatusMessage"))) {
+                       if (in_array($target, ["Comment", "Like", "Post", "Reshare", "StatusMessage"])) {
                                logger('processing retraction for '.$target, LOGGER_DEBUG);
-                               $importer = array("uid" => 0, "page-flags" => PAGE_FREELOVE);
+                               $importer = ["uid" => 0, "page-flags" => PAGE_FREELOVE];
                                $message_id = self::dispatch($importer, $msg, $fields);
                                return $message_id;
                        }
@@ -484,7 +532,7 @@ class Diaspora
                        logger("Unwanted message from ".$msg["author"]." send by ".$_SERVER["REMOTE_ADDR"]." with ".$_SERVER["HTTP_USER_AGENT"].": ".print_r($msg, true), LOGGER_DEBUG);
                } else {
                        // Use a dummy importer to import the data for the public copy
-                       $importer = array("uid" => 0, "page-flags" => PAGE_FREELOVE);
+                       $importer = ["uid" => 0, "page-flags" => PAGE_FREELOVE];
                        $message_id = self::dispatch($importer, $msg, $fields);
                }
 
@@ -541,7 +589,7 @@ class Diaspora
                        case "message":
                                return self::receiveMessage($importer, $fields);
 
-                       case "participation": // Not implemented
+                       case "participation":
                                return self::receiveParticipation($importer, $fields);
 
                        case "photo": // Not implemented
@@ -609,7 +657,7 @@ class Diaspora
 
                // All retractions are handled identically from now on.
                // In the new version there will only be "retraction".
-               if (in_array($type, array("signed_retraction", "relayable_retraction")))
+               if (in_array($type, ["signed_retraction", "relayable_retraction"]))
                        $type = "retraction";
 
                if ($type == "request") {
@@ -629,7 +677,7 @@ class Diaspora
                                if ($fieldname == "participant_handles") {
                                        $fieldname = "participants";
                                }
-                               if (in_array($type, array("like", "participation"))) {
+                               if (in_array($type, ["like", "participation"])) {
                                        if ($fieldname == "target_type") {
                                                $fieldname = "parent_type";
                                        }
@@ -662,15 +710,14 @@ class Diaspora
                                $author_signature = base64_decode($entry);
                        } elseif (($fieldname == "parent_author_signature") && ($entry != "")) {
                                $parent_author_signature = base64_decode($entry);
-                       } elseif (!in_array($fieldname, array("author_signature", "parent_author_signature", "target_author_signature"))) {
+                       } elseif (!in_array($fieldname, ["author_signature", "parent_author_signature", "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"))
+                       if (!in_array($fieldname, ["parent_author_signature", "target_author_signature"])
                                || ($orig_type == "relayable_retraction")
                        ) {
                                XML::copy($entry, $fields, $fieldname);
@@ -678,7 +725,7 @@ class Diaspora
                }
 
                // This is something that shouldn't happen at all.
-               if (in_array($type, array("status_message", "reshare", "profile"))) {
+               if (in_array($type, ["status_message", "reshare", "profile"])) {
                        if ($msg["author"] != $fields->author) {
                                logger("Message handle is not the same as envelope sender. Quitting this message.");
                                return false;
@@ -686,8 +733,8 @@ class Diaspora
                }
 
                // Only some message types have signatures. So we quit here for the other types.
-               if (!in_array($type, array("comment", "like"))) {
-                       return array("fields" => $fields, "relayed" => false);
+               if (!in_array($type, ["comment", "like"])) {
+                       return ["fields" => $fields, "relayed" => false];
                }
                // No author_signature? This is a must, so we quit.
                if (!isset($author_signature)) {
@@ -700,7 +747,7 @@ class Diaspora
 
                        $key = self::key($msg["author"]);
 
-                       if (!rsa_verify($signed_data, $parent_author_signature, $key, "sha256")) {
+                       if (!Crypto::rsaVerify($signed_data, $parent_author_signature, $key, "sha256")) {
                                logger("No valid parent author signature for parent author ".$msg["author"]. " in type ".$type." - signed data: ".$signed_data." - Message: ".$msg["message"]." - Signature ".$parent_author_signature, LOGGER_DEBUG);
                                return false;
                        }
@@ -710,11 +757,11 @@ class Diaspora
 
                $key = self::key($fields->author);
 
-               if (!rsa_verify($signed_data, $author_signature, $key, "sha256")) {
+               if (!Crypto::rsaVerify($signed_data, $author_signature, $key, "sha256")) {
                        logger("No valid author signature for author ".$fields->author. " in type ".$type." - signed data: ".$signed_data." - Message: ".$msg["message"]." - Signature ".$author_signature, LOGGER_DEBUG);
                        return false;
                } else {
-                       return array("fields" => $fields, "relayed" => $relayed);
+                       return ["fields" => $fields, "relayed" => $relayed];
                }
        }
 
@@ -928,10 +975,12 @@ class Diaspora
        /**
         * @brief Get a contact id for a given handle
         *
+        * @todo Move to Friendica\Model\Contact
+        *
         * @param int    $uid    The user id
         * @param string $handle The handle in the format user@domain.tld
         *
-        * @return The contact id
+        * @return int Contact id
         */
        private static function contactByHandle($uid, $handle)
        {
@@ -993,16 +1042,18 @@ class Diaspora
                 * That makes us friends.
                 * Normally this should have handled by getting a request - but this could get lost
                 */
-               if ($contact["rel"] == CONTACT_IS_FOLLOWER && in_array($importer["page-flags"], array(PAGE_FREELOVE))) {
-                       dba::update(
-                               'contact',
-                               array('rel' => CONTACT_IS_FRIEND, 'writable' => true),
-                               array('id' => $contact["id"], 'uid' => $contact["uid"])
-                       );
-
-                       $contact["rel"] = CONTACT_IS_FRIEND;
-                       logger("defining user ".$contact["nick"]." as friend");
-               }
+               // 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(
+               //              'contact',
+               //              array('rel' => CONTACT_IS_FRIEND, 'writable' => true),
+               //              array('id' => $contact["id"], 'uid' => $contact["uid"])
+               //      );
+               //
+               //      $contact["rel"] = CONTACT_IS_FRIEND;
+               //      logger("defining user ".$contact["nick"]." as friend");
+               //}
 
                // We don't seem to like that person
                if ($contact["blocked"] || $contact["readonly"] || $contact["archive"]) {
@@ -1090,7 +1141,7 @@ class Diaspora
                preg_replace_callback(
                        $expression,
                        function ($match) use ($item) {
-                               return self::fetchGuidSub($match, $item);
+                               self::fetchGuidSub($match, $item);
                        },
                        $item["body"]
                );
@@ -1098,7 +1149,7 @@ class Diaspora
                preg_replace_callback(
                        "&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
                        function ($match) use ($item) {
-                               return self::fetchGuidSub($match, $item);
+                               self::fetchGuidSub($match, $item);
                        },
                        $item["body"]
                );
@@ -1111,7 +1162,7 @@ class Diaspora
         * @param string $body        The item body to replace links from
         * @param string $author_link The author link for missing local contact fallback
         *
-        * @return the replaced string
+        * @return string the replaced string
         */
        public static function replacePeopleGuid($body, $author_link)
        {
@@ -1260,7 +1311,7 @@ class Diaspora
                        return false;
                }
 
-               $msg = array("message" => $x, "author" => $author);
+               $msg = ["message" => $x, "author" => $author];
 
                $msg["key"] = self::key($msg["author"]);
 
@@ -1340,16 +1391,12 @@ class Diaspora
                if ($r) {
                        $cid = $r[0]["id"];
                        $network = $r[0]["network"];
-
-                       // We are receiving content from a user that possibly is about to be terminated
-                       // This means the user is vital, so we remove a possible termination date.
-                       Contact::unmarkForArchival($r[0]);
                } else {
                        $cid = $contact["id"];
                        $network = NETWORK_DIASPORA;
                }
 
-               return array("cid" => $cid, "network" => $network);
+               return ["cid" => $cid, "network" => $network];
        }
 
        /**
@@ -1433,7 +1480,7 @@ class Diaspora
                // Check signature
                $signed_text = 'AccountMigration:'.$old_handle.':'.$new_handle;
                $key = self::key($old_handle);
-               if (!rsa_verify($signed_text, $signature, $key, "sha256")) {
+               if (!Crypto::rsaVerify($signed_text, $signature, $key, "sha256")) {
                        logger('No valid signature for migration.');
                        return false;
                }
@@ -1448,30 +1495,30 @@ class Diaspora
                        return false;
                }
 
-               $fields = array('url' => $data['url'], 'nurl' => normalise_link($data['url']),
+               $fields = ['url' => $data['url'], 'nurl' => normalise_link($data['url']),
                                'name' => $data['name'], 'nick' => $data['nick'],
                                'addr' => $data['addr'], 'batch' => $data['batch'],
                                'notify' => $data['notify'], 'poll' => $data['poll'],
-                               'network' => $data['network']);
+                               'network' => $data['network']];
 
-               dba::update('contact', $fields, array('addr' => $old_handle));
+               dba::update('contact', $fields, ['addr' => $old_handle]);
 
-               $fields = array('url' => $data['url'], 'nurl' => normalise_link($data['url']),
+               $fields = ['url' => $data['url'], 'nurl' => normalise_link($data['url']),
                                'name' => $data['name'], 'nick' => $data['nick'],
                                'addr' => $data['addr'], 'connect' => $data['addr'],
                                'notify' => $data['notify'], 'photo' => $data['photo'],
-                               'server_url' => $data['baseurl'], 'network' => $data['network']);
+                               'server_url' => $data['baseurl'], 'network' => $data['network']];
 
-               dba::update('gcontact', $fields, array('addr' => $old_handle));
+               dba::update('gcontact', $fields, ['addr' => $old_handle]);
 
                logger('Contacts are updated.');
 
                // update items
                /// @todo This is an extreme performance killer
-               $fields = array(
-                       'owner-link' => array($contact["url"], $data["url"]),
-                       'author-link' => array($contact["url"], $data["url"]),
-               );
+               $fields = [
+                       'owner-link' => [$contact["url"], $data["url"]],
+                       'author-link' => [$contact["url"], $data["url"]],
+               ];
                foreach ($fields as $n => $f) {
                        $r = q(
                                "SELECT `id` FROM `item` WHERE `%s` = '%s' AND `uid` = %d LIMIT 1",
@@ -1640,7 +1687,7 @@ class Diaspora
                // Fetch the contact id - if we know this contact
                $author_contact = self::authorContactByUrl($contact, $person, $importer["uid"]);
 
-               $datarray = array();
+               $datarray = [];
 
                $datarray["uid"] = $importer["uid"];
                $datarray["contact-id"] = $author_contact["cid"];
@@ -1696,7 +1743,7 @@ class Diaspora
                if ($message_id && $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.
-                       dba::insert('sign', array('iid' => $message_id, 'signed_text' => json_encode($data)));
+                       dba::insert('sign', ['iid' => $message_id, 'signed_text' => json_encode($data)]);
 
                        // notify others
                        Worker::add(PRIORITY_HIGH, "Notifier", "comment-import", $message_id);
@@ -1781,22 +1828,22 @@ class Diaspora
 
                dba::unlock();
 
-               dba::update('conv', array('updated' => datetime_convert()), array('id' => $conversation["id"]));
+               dba::update('conv', ['updated' => datetime_convert()], ['id' => $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),
+                       "item" => ["subject" => $subject, "body" => $body],
                        "source_name" => $person["name"],
                        "source_link" => $person["url"],
                        "source_photo" => $person["thumb"],
                        "verb" => ACTIVITY_POST,
-                       "otype" => "mail")
+                       "otype" => "mail"]
                );
                return true;
        }
@@ -1909,12 +1956,12 @@ class Diaspora
                $link = '<link rel="alternate" type="text/html" href="'.System::baseUrl()."/display/".$importer["nickname"]."/".$parent_item["id"].'" />';
                $parent_body = $parent_item["body"];
 
-               $xmldata = array("object" => array("type" => $objtype,
+               $xmldata = ["object" => ["type" => $objtype,
                                                "local" => "1",
                                                "id" => $parent_item["uri"],
                                                "link" => $link,
                                                "title" => "",
-                                               "content" => $parent_body));
+                                               "content" => $parent_body]];
 
                return XML::fromArray($xmldata, $xml, true);
        }
@@ -1938,7 +1985,7 @@ class Diaspora
 
                // 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($parent_type, array("Post", "Comment"))) {
+               if (!in_array($parent_type, ["Post", "Comment"])) {
                        return false;
                }
 
@@ -1974,7 +2021,7 @@ class Diaspora
                        $verb = ACTIVITY_DISLIKE;
                }
 
-               $datarray = array();
+               $datarray = [];
 
                $datarray["protocol"] = PROTOCOL_DIASPORA;
 
@@ -2015,7 +2062,7 @@ class Diaspora
 
                // like on comments have the comment as parent. So we need to fetch the toplevel parent
                if ($parent_item["id"] != $parent_item["parent"]) {
-                       $toplevel = dba::select('item', array('origin'), array('id' => $parent_item["parent"]), array('limit' => 1));
+                       $toplevel = dba::selectFirst('item', ['origin'], ['id' => $parent_item["parent"]]);
                        $origin = $toplevel["origin"];
                } else {
                        $origin = $parent_item["origin"];
@@ -2025,7 +2072,7 @@ class Diaspora
                if ($message_id && $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.
-                       dba::insert('sign', array('iid' => $message_id, 'signed_text' => json_encode($data)));
+                       dba::insert('sign', ['iid' => $message_id, 'signed_text' => json_encode($data)]);
 
                        // notify others
                        Worker::add(PRIORITY_HIGH, "Notifier", "comment-import", $message_id);
@@ -2114,7 +2161,7 @@ class Diaspora
 
                dba::unlock();
 
-               dba::update('conv', array('updated' => datetime_convert()), array('id' => $conversation["id"]));
+               dba::update('conv', ['updated' => datetime_convert()], ['id' => $conversation["id"]]);
                return true;
        }
 
@@ -2128,7 +2175,54 @@ class Diaspora
         */
        private static function receiveParticipation($importer, $data)
        {
-               // I'm not sure if we can fully support this message type
+               $author = strtolower(notags(unxmlify($data->author)));
+               $parent_guid = notags(unxmlify($data->parent_guid));
+
+               $contact_id = Contact::getIdForURL($author);
+               if (!$contact_id) {
+                       logger('Contact not found: '.$author);
+                       return false;
+               }
+
+               $person = self::personByHandle($author);
+               if (!is_array($person)) {
+                       logger("Person not found: ".$author);
+                       return false;
+               }
+
+               $item = dba::selectFirst('item', ['id'], ['guid' => $parent_guid, 'origin' => true, 'private' => false]);
+               if (!DBM::is_result($item)) {
+                       logger('Item not found, no origin or private: '.$parent_guid);
+                       return false;
+               }
+
+               $author_parts = explode('@', $author);
+               if (isset($author_parts[1])) {
+                       $server = $author_parts[1];
+               } else {
+                       // Should never happen
+                       $server = $author;
+               }
+
+               logger('Received participation for ID: '.$item['id'].' - Contact: '.$contact_id.' - Server: '.$server, LOGGER_DEBUG);
+               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 = dba::p("SELECT `item`.`id`, `item`.`verb`, `contact`.`self`
+                               FROM `item`
+                               INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
+                               WHERE `item`.`parent` = ? AND `item`.`id` != `item`.`parent`", $item['id']);
+               while ($comment = dba::fetch($comments)) {
+                       if ($comment['verb'] == ACTIVITY_POST) {
+                               $cmd = $comment['self'] ? 'comment-new' : 'comment-import';
+                       } else {
+                               $cmd = $comment['self'] ? 'like' : 'comment-import';
+                       }
+                       logger("Send ".$cmd." for item ".$comment['id']." to contact ".$contact_id, LOGGER_DEBUG);
+                       Worker::add(PRIORITY_HIGH, 'Delivery', $cmd, $comment['id'], $contact_id);
+               }
+               dba::close($comments);
+
                return true;
        }
 
@@ -2190,7 +2284,7 @@ class Diaspora
 
                $tags = explode("#", $tags);
 
-               $keywords = array();
+               $keywords = [];
                foreach ($tags as $tag) {
                        $tag = trim(strtolower($tag));
                        if ($tag != "") {
@@ -2211,7 +2305,7 @@ class Diaspora
                        $image_url = "http://".$handle_parts[1].$image_url;
                }
 
-               update_contact_avatar($image_url, $importer["uid"], $contact["id"]);
+               Contact::updateAvatar($image_url, $importer["uid"], $contact["id"]);
 
                // Generic birthday. We don't know the timezone. The year is irrelevant.
 
@@ -2244,15 +2338,15 @@ class Diaspora
                        intval($importer["uid"])
                );
 
-               $gcontact = array("url" => $contact["url"], "network" => NETWORK_DIASPORA, "generation" => 2,
+               $gcontact = ["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" => $nsfw);
+                                       "hide" => !$searchable, "nsfw" => $nsfw];
 
-               $gcid = GlobalContact::update($gcontact);
+               $gcid = GContact::update($gcontact);
 
-               GlobalContact::link($gcid, $importer["uid"], $contact["id"]);
+               GContact::link($gcid, $importer["uid"], $contact["id"]);
 
                logger("Profile of contact ".$contact["id"]." stored for user ".$importer["uid"], LOGGER_DEBUG);
 
@@ -2273,8 +2367,8 @@ class Diaspora
                if ($contact["rel"] == CONTACT_IS_SHARING) {
                        dba::update(
                                'contact',
-                               array('rel' => CONTACT_IS_FRIEND, 'writable' => true),
-                               array('id' => $contact["id"], 'uid' => $importer["uid"])
+                               ['rel' => CONTACT_IS_FRIEND, 'writable' => true],
+                               ['id' => $contact["id"], 'uid' => $importer["uid"]]
                        );
                }
                // send notification
@@ -2293,7 +2387,7 @@ class Diaspora
                        // 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 = [];
                                $arr["protocol"] = PROTOCOL_DIASPORA;
                                $arr["uri"] = $arr["parent-uri"] = item_new_uri($a->get_hostname(), $importer["uid"]);
                                $arr["uid"] = $importer["uid"];
@@ -2311,16 +2405,18 @@ class Diaspora
                                $A = "[url=".$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;
+                               $arr["body"] = sprintf(t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$BPhoto;
 
                                $arr["object"] = self::constructNewFriendObject($contact);
 
                                $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"];
+                               $user = dba::selectFirst('user', ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'], ['uid' => $importer["uid"]]);
+
+                               $arr["allow_cid"] = $user["allow_cid"];
+                               $arr["allow_gid"] = $user["allow_gid"];
+                               $arr["deny_cid"]  = $user["deny_cid"];
+                               $arr["deny_gid"]  = $user["deny_gid"];
 
                                $i = item_store($arr);
                                if ($i) {
@@ -2343,10 +2439,10 @@ class Diaspora
                $link = '<link rel="alternate" type="text/html" href="'.$contact["url"].'" />'."\n".
                        '<link rel="photo" type="image/jpeg" href="'.$contact["thumb"].'" />'."\n";
 
-               $xmldata = array("object" => array("type" => $objtype,
+               $xmldata = ["object" => ["type" => $objtype,
                                                "title" => $contact["name"],
                                                "id" => $contact["url"]."/".$contact["name"],
-                                               "link" => $link));
+                                               "link" => $link]];
 
                return XML::fromArray($xmldata, $xml, true);
        }
@@ -2396,7 +2492,7 @@ 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($contact["rel"], array(CONTACT_IS_FRIEND))) {
+                               if (in_array($contact["rel"], [CONTACT_IS_FRIEND])) {
                                        $u = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", intval($importer["uid"]));
                                        if ($u) {
                                                logger("Sending share message to author ".$author." - Contact: ".$contact["id"]." - User: ".$importer["uid"], LOGGER_DEBUG);
@@ -2411,7 +2507,7 @@ class Diaspora
                        }
                }
 
-               if (!$following && $sharing && in_array($importer["page-flags"], array(PAGE_SOAPBOX, PAGE_NORMAL))) {
+               if (!$following && $sharing && in_array($importer["page-flags"], [PAGE_SOAPBOX, 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) {
@@ -2465,13 +2561,9 @@ class Diaspora
 
                logger("Author ".$author." was added as contact number ".$contact_record["id"].".", LOGGER_DEBUG);
 
-               $def_gid = get_default_group($importer['uid'], $ret["network"]);
-
-               if (intval($def_gid)) {
-                       group_add_member($importer["uid"], "", $contact_record["id"], $def_gid);
-               }
+               Group::addMember(User::getDefaultGroup($importer['uid'], $ret["network"]), $contact_record['id']);
 
-               update_contact_avatar($ret["photo"], $importer['uid'], $contact_record["id"], true);
+               Contact::updateAvatar($ret["photo"], $importer['uid'], $contact_record["id"], true);
 
                if ($importer["page-flags"] == PAGE_NORMAL) {
                        logger("Sending intra message for author ".$author.".", LOGGER_DEBUG);
@@ -2494,7 +2586,7 @@ class Diaspora
 
                        logger("Does an automatic friend approval for author ".$author.".", LOGGER_DEBUG);
 
-                       update_contact_avatar($contact_record["photo"], $importer["uid"], $contact_record["id"]);
+                       Contact::updateAvatar($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
@@ -2529,7 +2621,7 @@ class Diaspora
                                $ret = self::sendShare($u[0], $contact_record);
 
                                // Send the profile data, maybe it weren't transmitted before
-                               self::sendProfile($importer["uid"], array($contact_record));
+                               self::sendProfile($importer["uid"], [$contact_record]);
                        }
                }
 
@@ -2562,7 +2654,7 @@ class Diaspora
                        // Then refetch the content, if it is a reshare from a reshare.
                        // If it is a reshared post from another network then reformat to avoid display problems with two share elements
                        if (self::isReshare($r[0]["body"], true)) {
-                               $r = array();
+                               $r = [];
                        } elseif (self::isReshare($r[0]["body"], false) || strstr($r[0]["body"], "[share")) {
                                $r[0]["body"] = diaspora2bb(bb2diaspora($r[0]["body"]));
 
@@ -2646,7 +2738,7 @@ class Diaspora
 
                $orig_url = System::baseUrl()."/display/".$original_item["guid"];
 
-               $datarray = array();
+               $datarray = [];
 
                $datarray["uid"] = $importer["uid"];
                $datarray["contact-id"] = $contact["id"];
@@ -2691,6 +2783,8 @@ class Diaspora
                self::fetchGuid($datarray);
                $message_id = item_store($datarray);
 
+               self::sendParticipation($contact, $datarray);
+
                if ($message_id) {
                        logger("Stored reshare ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
                        return true;
@@ -2725,13 +2819,13 @@ class Diaspora
                }
 
                // Fetch items that are about to be deleted
-               $fields = array('uid', 'id', 'parent', 'parent-uri', 'author-link');
+               $fields = ['uid', 'id', 'parent', 'parent-uri', 'author-link'];
 
                // When we receive a public retraction, we delete every item that we find.
                if ($importer['uid'] == 0) {
-                       $condition = array("`guid` = ? AND NOT `file` LIKE '%%[%%' AND NOT `deleted`", $target_guid);
+                       $condition = ["`guid` = ? AND NOT `file` LIKE '%%[%%' AND NOT `deleted`", $target_guid];
                } else {
-                       $condition = array("`guid` = ? AND `uid` = ? AND NOT `file` LIKE '%%[%%' AND NOT `deleted`", $target_guid, $importer['uid']);
+                       $condition = ["`guid` = ? AND `uid` = ? AND NOT `file` LIKE '%%[%%' AND NOT `deleted`", $target_guid, $importer['uid']];
                }
                $r = dba::select('item', $fields, $condition);
                if (!DBM::is_result($r)) {
@@ -2741,7 +2835,7 @@ class Diaspora
 
                while ($item = dba::fetch($r)) {
                        // Fetch the parent item
-                       $parent = dba::select('item', array('author-link', 'origin'), array('id' => $item["parent"]), array('limit' => 1));
+                       $parent = dba::selectFirst('item', ['author-link', 'origin'], ['id' => $item["parent"]]);
 
                        // Only delete it if the parent author really fits
                        if (!link_compare($parent["author-link"], $contact["url"]) && !link_compare($item["author-link"], $contact["url"])) {
@@ -2753,13 +2847,13 @@ class Diaspora
                        // The function "item_drop" doesn't work for that case
                        dba::update(
                                'item',
-                               array(
+                               [
                                        'deleted' => true,
                                        'title' => '',
                                        'body' => '',
                                        'edited' => datetime_convert(),
-                                       'changed' => datetime_convert()),
-                               array('id' => $item["id"])
+                                       'changed' => datetime_convert()],
+                               ['id' => $item["id"]]
                        );
 
                        // Delete the thread - if it is a starting post and not a comment
@@ -2793,7 +2887,7 @@ class Diaspora
                $target_type = notags(unxmlify($data->target_type));
 
                $contact = self::contactByHandle($importer["uid"], $sender);
-               if (!$contact && (in_array($target_type, array("Contact", "Person")))) {
+               if (!$contact && (in_array($target_type, ["Contact", "Person"]))) {
                        logger("cannot find contact for sender: ".$sender." and user ".$importer["uid"]);
                        return false;
                }
@@ -2850,7 +2944,7 @@ class Diaspora
                        return true;
                }
 
-               $address = array();
+               $address = [];
                if ($data->location) {
                        foreach ($data->location->children() as $fieldname => $data) {
                                $address[$fieldname] = notags(unxmlify($data));
@@ -2859,7 +2953,7 @@ class Diaspora
 
                $body = diaspora2bb($text);
 
-               $datarray = array();
+               $datarray = [];
 
                // Attach embedded pictures to the body
                if ($data->photo) {
@@ -2929,6 +3023,8 @@ class Diaspora
                self::fetchGuid($datarray);
                $message_id = item_store($datarray);
 
+               self::sendParticipation($contact, $datarray);
+
                if ($message_id) {
                        logger("Stored item ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
                        return true;
@@ -2994,14 +3090,14 @@ class Diaspora
 
                $ciphertext = self::aesEncrypt($aes_key, $iv, $msg);
 
-               $json = json_encode(array("iv" => $b_iv, "key" => $b_aes_key));
+               $json = json_encode(["iv" => $b_iv, "key" => $b_aes_key]);
 
                $encrypted_key_bundle = "";
                openssl_public_encrypt($json, $encrypted_key_bundle, $pubkey);
 
                $json_object = json_encode(
-                       array("aes_key" => base64_encode($encrypted_key_bundle),
-                                       "encrypted_magic_envelope" => base64_encode($ciphertext))
+                       ["aes_key" => base64_encode($encrypted_key_bundle),
+                                       "encrypted_magic_envelope" => base64_encode($ciphertext)]
                );
 
                return $json_object;
@@ -3018,7 +3114,7 @@ class Diaspora
        public static function buildMagicEnvelope($msg, $user)
        {
                $b64url_data = base64url_encode($msg);
-               $data = str_replace(array("\n", "\r", " ", "\t"), array("", "", "", ""), $b64url_data);
+               $data = str_replace(["\n", "\r", " ", "\t"], ["", "", "", ""], $b64url_data);
 
                $key_id = base64url_encode(self::myHandle($user));
                $type = "application/xml";
@@ -3031,17 +3127,17 @@ class Diaspora
                        $user['uprvkey'] = $user['prvkey'];
                }
 
-               $signature = rsa_sign($signable_data, $user["uprvkey"]);
+               $signature = Crypto::rsaSign($signable_data, $user["uprvkey"]);
                $sig = base64url_encode($signature);
 
-               $xmldata = array("me:env" => array("me:data" => $data,
-                                                       "@attributes" => array("type" => $type),
+               $xmldata = ["me:env" => ["me:data" => $data,
+                                                       "@attributes" => ["type" => $type],
                                                        "me:encoding" => $encoding,
                                                        "me:alg" => $alg,
                                                        "me:sig" => $sig,
-                                                       "@attributes2" => array("key_id" => $key_id)));
+                                                       "@attributes2" => ["key_id" => $key_id]]];
 
-               $namespaces = array("me" => "http://salmon-protocol.org/ns/magic-env");
+               $namespaces = ["me" => "http://salmon-protocol.org/ns/magic-env"];
 
                return XML::fromArray($xmldata, $xml, false, $namespaces);
        }
@@ -3087,7 +3183,7 @@ class Diaspora
 
                $signed_text = implode(";", $sigmsg);
 
-               return base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256"));
+               return base64_encode(Crypto::rsaSign($signed_text, $owner["uprvkey"], "sha256"));
        }
 
        /**
@@ -3112,7 +3208,15 @@ class Diaspora
                }
 
                $logid = random_string(4);
-               $dest_url = (($public_batch) ? $contact["batch"] : $contact["notify"]);
+               $dest_url = ($public_batch ? $contact["batch"] : $contact["notify"]);
+
+               // Fetch the fcontact entry when there is missing data
+               // Will possibly happen when data is transmitted to a DFRN contact
+               if (empty($dest_url) && !empty($contact['addr'])) {
+                       $fcontact = self::personByHandle($contact['addr']);
+                       $dest_url = ($public_batch ? $fcontact["batch"] : $fcontact["notify"]);
+               }
+
                if (!$dest_url) {
                        logger("no url for contact: ".$contact["id"]." batch mode =".$public_batch);
                        return 0;
@@ -3126,7 +3230,7 @@ class Diaspora
                        if (!intval(Config::get("system", "diaspora_test"))) {
                                $content_type = (($public_batch) ? "application/magic-envelope+xml" : "application/json");
 
-                               post_url($dest_url."/", $envelope, array("Content-Type: ".$content_type));
+                               post_url($dest_url."/", $envelope, ["Content-Type: ".$content_type]);
                                $return_code = $a->get_curl_code();
                        } else {
                                logger("test_mode");
@@ -3174,7 +3278,7 @@ class Diaspora
         */
        public static function buildPostXml($type, $message)
        {
-               $data = array($type => $message);
+               $data = [$type => $message];
 
                return XML::fromArray($data, $xml);
        }
@@ -3213,11 +3317,59 @@ class Diaspora
                        $return_code = self::transmit($owner, $contact, $envelope, $public_batch, false, $guid);
                }
 
-               logger("guid: ".$item["guid"]." result ".$return_code, LOGGER_DEBUG);
+               logger("guid: ".$guid." result ".$return_code, LOGGER_DEBUG);
 
                return $return_code;
        }
 
+       /**
+        * @brief sends a participation (Used to get all further updates)
+        *
+        * @param array $contact Target of the communication
+        * @param array $item    Item array
+        *
+        * @return int The result of the transmission
+        */
+       private static function sendParticipation($contact, $item)
+       {
+               // Don't send notifications for private postings
+               if ($item['private']) {
+                       return;
+               }
+
+               $cachekey = "diaspora:sendParticipation:".$item['guid'];
+
+               $result = Cache::get($cachekey);
+               if (!is_null($result)) {
+                       return;
+               }
+
+               // Fetch some user id to have a valid handle to transmit the participation.
+               // In fact it doesn't matter which user sends this - but it is needed by the protocol.
+               // If the item belongs to a user, we take this user id.
+               if ($item['uid'] == 0) {
+                       $condition = ['verified' => true, 'blocked' => false, 'account_removed' => false, 'account_expired' => false];
+                       $first_user = dba::selectFirst('user', ['uid'], $condition);
+                       $owner = User::getOwnerDataById($first_user['uid']);
+               } else {
+                       $owner = User::getOwnerDataById($item['uid']);
+               }
+
+               $author = self::myHandle($owner);
+
+               $message = ["author" => $author,
+                               "guid" => get_guid(32),
+                               "parent_type" => "Post",
+                               "parent_guid" => $item["guid"]];
+
+               logger("Send participation for ".$item["guid"]." by ".$author, LOGGER_DEBUG);
+
+               // It doesn't matter what we store, we only want to avoid sending repeated notifications for the same item
+               Cache::set($cachekey, $item["guid"], CACHE_QUARTER_HOUR);
+
+               return self::buildAndTransmit($owner, $contact, "participation", $message);
+       }
+
        /**
         * @brief sends an account migration
         *
@@ -3233,11 +3385,11 @@ class Diaspora
                $profile = self::createProfileData($uid);
 
                $signed_text = 'AccountMigration:'.$old_handle.':'.$profile['author'];
-               $signature = base64_encode(rsa_sign($signed_text, $owner["uprvkey"], "sha256"));
+               $signature = base64_encode(Crypto::rsaSign($signed_text, $owner["uprvkey"], "sha256"));
 
-               $message = array("author" => $old_handle,
+               $message = ["author" => $old_handle,
                                "profile" => $profile,
-                               "signature" => $signature);
+                               "signature" => $signature];
 
                logger("Send account migration ".print_r($message, true), LOGGER_DEBUG);
 
@@ -3275,10 +3427,10 @@ class Diaspora
                }
                */
 
-               $message = array("author" => self::myHandle($owner),
+               $message = ["author" => self::myHandle($owner),
                                "recipient" => $contact["addr"],
                                "following" => "true",
-                               "sharing" => "true");
+                               "sharing" => "true"];
 
                logger("Send share ".print_r($message, true), LOGGER_DEBUG);
 
@@ -3295,10 +3447,10 @@ class Diaspora
         */
        public static function sendUnshare($owner, $contact)
        {
-               $message = array("author" => self::myHandle($owner),
+               $message = ["author" => self::myHandle($owner),
                                "recipient" => $contact["addr"],
                                "following" => "false",
-                               "sharing" => "false");
+                               "sharing" => "false"];
 
                logger("Send unshare ".print_r($message, true), LOGGER_DEBUG);
 
@@ -3358,7 +3510,7 @@ class Diaspora
                                NETWORK_DIASPORA
                        );
                        if ($r) {
-                               $ret= array();
+                               $ret= [];
                                $ret["root_handle"] = self::handleFromContact($r[0]["contact-id"]);
                                $ret["root_guid"] = $guid;
                                return($ret);
@@ -3376,7 +3528,7 @@ class Diaspora
                        $profile = $matches[1];
                }
 
-               $ret= array();
+               $ret= [];
 
                $ret["root_handle"] = preg_replace("=https?://(.*)/u/(.*)=ism", "$2@$1", $profile);
                if (($ret["root_handle"] == $profile) || ($ret["root_handle"] == "")) {
@@ -3413,23 +3565,23 @@ class Diaspora
        {
                $r = q("SELECT `guid`, `uid`, `start`, `finish`, `nofinish`, `summary`, `desc`, `location`, `adjust` FROM `event` WHERE `id` = %d", intval($event_id));
                if (!DBM::is_result($r)) {
-                       return array();
+                       return [];
                }
 
                $event = $r[0];
 
-               $eventdata = array();
+               $eventdata = [];
 
                $r = q("SELECT `timezone` FROM `user` WHERE `uid` = %d", intval($event['uid']));
                if (!DBM::is_result($r)) {
-                       return array();
+                       return [];
                }
 
                $user = $r[0];
 
                $r = q("SELECT `addr`, `nick` FROM `contact` WHERE `uid` = %d AND `self`", intval($event['uid']));
                if (!DBM::is_result($r)) {
-                       return array();
+                       return [];
                }
 
                $owner = $r[0];
@@ -3466,7 +3618,7 @@ class Diaspora
                        $eventdata['description'] = html_entity_decode(bb2diaspora($event['desc']));
                }
                if ($event['location']) {
-                       $location = array();
+                       $location = [];
                        $location["address"] = html_entity_decode(bb2diaspora($event['location']));
                        $location["lat"] = 0;
                        $location["lng"] = 0;
@@ -3503,13 +3655,13 @@ class Diaspora
 
                // Detect a share element and do a reshare
                if (!$item['private'] && ($ret = self::isReshare($item["body"]))) {
-                       $message = array("author" => $myaddr,
+                       $message = ["author" => $myaddr,
                                        "guid" => $item["guid"],
                                        "created_at" => $created,
                                        "root_author" => $ret["root_handle"],
                                        "root_guid" => $ret["root_guid"],
                                        "provider_display_name" => $item["app"],
-                                       "public" => $public);
+                                       "public" => $public];
 
                        $type = "reshare";
                } else {
@@ -3534,7 +3686,7 @@ class Diaspora
                                }
                        }
 
-                       $location = array();
+                       $location = [];
 
                        if ($item["location"] != "")
                                $location["address"] = $item["location"];
@@ -3545,13 +3697,13 @@ class Diaspora
                                $location["lng"] = $coord[1];
                        }
 
-                       $message = array("author" => $myaddr,
+                       $message = ["author" => $myaddr,
                                        "guid" => $item["guid"],
                                        "created_at" => $created,
                                        "public" => $public,
                                        "text" => $body,
                                        "provider_display_name" => $item["app"],
-                                       "location" => $location);
+                                       "location" => $location];
 
                        // Diaspora rejects messages when they contain a location without "lat" or "lng"
                        if (!isset($location["lat"]) || !isset($location["lng"])) {
@@ -3571,7 +3723,7 @@ class Diaspora
                        $type = "status_message";
                }
 
-               $msg = array("type" => $type, "message" => $message);
+               $msg = ["type" => $type, "message" => $message];
 
                Cache::set($cachekey, $msg, CACHE_QUARTER_HOUR);
 
@@ -3622,12 +3774,12 @@ class Diaspora
                        $positive = "false";
                }
 
-               return(array("author" => self::myHandle($owner),
+               return(["author" => self::myHandle($owner),
                                "guid" => $item["guid"],
                                "parent_guid" => $parent["guid"],
                                "parent_type" => $target_type,
                                "positive" => $positive,
-                               "author_signature" => ""));
+                               "author_signature" => ""]);
        }
 
        /**
@@ -3665,11 +3817,11 @@ class Diaspora
                                return false;
                }
 
-               return(array("author" => self::myHandle($owner),
+               return(["author" => self::myHandle($owner),
                                "guid" => $item["guid"],
                                "parent_guid" => $parent["guid"],
                                "status" => $attend_answer,
-                               "author_signature" => ""));
+                               "author_signature" => ""]);
        }
 
        /**
@@ -3704,12 +3856,12 @@ class Diaspora
                $text = html_entity_decode(bb2diaspora($item["body"]));
                $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d\TH:i:s\Z');
 
-               $comment = array("author" => self::myHandle($owner),
+               $comment = ["author" => self::myHandle($owner),
                                "guid" => $item["guid"],
                                "created_at" => $created,
                                "parent_guid" => $parent["guid"],
                                "text" => $text,
-                               "author_signature" => "");
+                               "author_signature" => ""];
 
                // Send the thread parent guid only if it is a threaded comment
                if ($item['thr-parent'] != $item['parent-uri']) {
@@ -3733,10 +3885,10 @@ class Diaspora
         */
        public static function sendFollowup($item, $owner, $contact, $public_batch = false)
        {
-               if (in_array($item['verb'], array(ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE))) {
+               if (in_array($item['verb'], [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE])) {
                        $message = self::constructAttend($item, $owner);
                        $type = "event_participation";
-               } elseif (in_array($item["verb"], array(ACTIVITY_LIKE, ACTIVITY_DISLIKE))) {
+               } elseif (in_array($item["verb"], [ACTIVITY_LIKE, ACTIVITY_DISLIKE])) {
                        $message = self::constructLike($item, $owner);
                        $type = "like";
                } else {
@@ -3767,17 +3919,17 @@ class Diaspora
                $signed_parts = explode(";", $signature['signed_text']);
 
                if ($item["deleted"]) {
-                       $message = array("author" => $signature['signer'],
+                       $message = ["author" => $signature['signer'],
                                        "target_guid" => $signed_parts[0],
-                                       "target_type" => $signed_parts[1]);
-               } elseif (in_array($item["verb"], array(ACTIVITY_LIKE, ACTIVITY_DISLIKE))) {
-                       $message = array("author" => $signed_parts[4],
+                                       "target_type" => $signed_parts[1]];
+               } elseif (in_array($item["verb"], [ACTIVITY_LIKE, ACTIVITY_DISLIKE])) {
+                       $message = ["author" => $signed_parts[4],
                                        "guid" => $signed_parts[1],
                                        "parent_guid" => $signed_parts[3],
                                        "parent_type" => $signed_parts[2],
                                        "positive" => $signed_parts[0],
                                        "author_signature" => $signature['signature'],
-                                       "parent_author_signature" => "");
+                                       "parent_author_signature" => ""];
                } else {
                        // Remove the comment guid
                        $guid = array_shift($signed_parts);
@@ -3791,12 +3943,12 @@ class Diaspora
                        // Glue the parts together
                        $text = implode(";", $signed_parts);
 
-                       $message = array("author" => $handle,
+                       $message = ["author" => $handle,
                                        "guid" => $guid,
                                        "parent_guid" => $parent_guid,
                                        "text" => implode(";", $signed_parts),
                                        "author_signature" => $signature['signature'],
-                                       "parent_author_signature" => "");
+                                       "parent_author_signature" => ""];
                }
                return $message;
        }
@@ -3815,7 +3967,7 @@ class Diaspora
        {
                if ($item["deleted"]) {
                        return self::sendRetraction($item, $owner, $contact, $public_batch, true);
-               } elseif (in_array($item["verb"], array(ACTIVITY_LIKE, ACTIVITY_DISLIKE))) {
+               } elseif (in_array($item["verb"], [ACTIVITY_LIKE, ACTIVITY_DISLIKE])) {
                        $type = "like";
                } else {
                        $type = "comment";
@@ -3844,7 +3996,7 @@ class Diaspora
                } else {// New way
                        $msg = json_decode($signature['signed_text'], true);
 
-                       $message = array();
+                       $message = [];
                        if (is_array($msg)) {
                                foreach ($msg as $field => $data) {
                                        if (!$item["deleted"]) {
@@ -3889,15 +4041,15 @@ class Diaspora
 
                if ($item['id'] == $item['parent']) {
                        $target_type = "Post";
-               } elseif (in_array($item["verb"], array(ACTIVITY_LIKE, ACTIVITY_DISLIKE))) {
+               } elseif (in_array($item["verb"], [ACTIVITY_LIKE, ACTIVITY_DISLIKE])) {
                        $target_type = "Like";
                } else {
                        $target_type = "Comment";
                }
 
-               $message = array("author" => $itemaddr,
+               $message = ["author" => $itemaddr,
                                "target_guid" => $item['guid'],
-                               "target_type" => $target_type);
+                               "target_type" => $target_type];
 
                logger("Got message ".print_r($message, true), LOGGER_DEBUG);
 
@@ -3929,36 +4081,36 @@ class Diaspora
                }
                $cnv = $r[0];
 
-               $conv = array(
+               $conv = [
                        "author" => $cnv["creator"],
                        "guid" => $cnv["guid"],
                        "subject" => $cnv["subject"],
                        "created_at" => datetime_convert("UTC", "UTC", $cnv['created'], 'Y-m-d\TH:i:s\Z'),
                        "participants" => $cnv["recips"]
-               );
+               ];
 
                $body = bb2diaspora($item["body"]);
                $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d\TH:i:s\Z');
 
-               $msg = array(
+               $msg = [
                        "author" => $myaddr,
                        "guid" => $item["guid"],
                        "conversation_guid" => $cnv["guid"],
                        "text" => $body,
                        "created_at" => $created,
-               );
+               ];
 
                if ($item["reply"]) {
                        $message = $msg;
                        $type = "message";
                } else {
-                       $message = array(
+                       $message = [
                                        "author" => $cnv["creator"],
                                        "guid" => $cnv["guid"],
                                        "subject" => $cnv["subject"],
                                        "created_at" => datetime_convert("UTC", "UTC", $cnv['created'], 'Y-m-d\TH:i:s\Z'),
                                        "participants" => $cnv["recips"],
-                                       "message" => $msg);
+                                       "message" => $msg];
 
                        $type = "conversation";
                }
@@ -3966,6 +4118,62 @@ class Diaspora
                return self::buildAndTransmit($owner, $contact, $type, $message, false, $item["guid"]);
        }
 
+       /**
+        * @brief Split a name into first name and last name
+        *
+        * @param string $name The name
+        *
+        * @return array The array with "first" and "last"
+        */
+       public static function splitName($name) {
+               $name = trim($name);
+
+               // Is the name longer than 64 characters? Then cut the rest of it.
+               if (strlen($name) > 64) {
+                       if ((strpos($name, ' ') <= 64) && (strpos($name, ' ') !== false)) {
+                               $name = trim(substr($name, 0, strrpos(substr($name, 0, 65), ' ')));
+                       } else {
+                               $name = substr($name, 0, 64);
+                       }
+               }
+
+               // Take the first word as first name
+               $first = ((strpos($name, ' ') ? trim(substr($name, 0, strpos($name, ' '))) : $name));
+               $last = (($first === $name) ? '' : trim(substr($name, strlen($first))));
+               if ((strlen($first) < 32) && (strlen($last) < 32)) {
+                       return ['first' => $first, 'last' => $last];
+               }
+
+               // Take the last word as last name
+               $first = ((strrpos($name, ' ') ? trim(substr($name, 0, strrpos($name, ' '))) : $name));
+               $last = (($first === $name) ? '' : trim(substr($name, strlen($first))));
+
+               if ((strlen($first) < 32) && (strlen($last) < 32)) {
+                       return ['first' => $first, 'last' => $last];
+               }
+
+               // Take the first 32 characters if there is no space in the first 32 characters
+               if ((strpos($name, ' ') > 32) || (strpos($name, ' ') === false)) {
+                       $first = substr($name, 0, 32);
+                       $last = substr($name, 32);
+                       return ['first' => $first, 'last' => $last];
+               }
+
+               $first = trim(substr($name, 0, strrpos(substr($name, 0, 33), ' ')));
+               $last = (($first === $name) ? '' : trim(substr($name, strlen($first))));
+
+               // Check if the last name is longer than 32 characters
+               if (strlen($last) > 32) {
+                       if (strpos($last, ' ') <= 32) {
+                               $last = trim(substr($last, 0, strrpos(substr($last, 0, 33), ' ')));
+                       } else {
+                               $last = substr($last, 0, 32);
+                       }
+               }
+
+               return ['first' => $first, 'last' => $last];
+       }
+
        /**
         * @brief Create profile data
         *
@@ -3985,15 +4193,16 @@ class Diaspora
                );
 
                if (!$r) {
-                       return array();
+                       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))));
+
+               $split_name = self::splitName($profile['name']);
+               $first = $split_name['first'];
+               $last = $split_name['last'];
+
                $large = System::baseUrl().'/photo/custom/300/'.$profile['uid'].'.jpg';
                $medium = System::baseUrl().'/photo/custom/100/'.$profile['uid'].'.jpg';
                $small = System::baseUrl().'/photo/custom/50/'  .$profile['uid'].'.jpg';
@@ -4026,7 +4235,7 @@ class Diaspora
                        $tags = trim($tags);
                }
 
-               return array("author" => $handle,
+               return ["author" => $handle,
                                "first_name" => $first,
                                "last_name" => $last,
                                "image_url" => $large,
@@ -4038,7 +4247,7 @@ class Diaspora
                                "location" => $location,
                                "searchable" => $searchable,
                                "nsfw" => "false",
-                               "tag_string" => $tags);
+                               "tag_string" => $tags];
        }
 
        /**
@@ -4054,6 +4263,11 @@ class Diaspora
                        return;
                }
 
+               $owner = User::getOwnerDataById($uid);
+               if (!$owner) {
+                       return;
+               }
+
                if (!$recips) {
                        $recips = q(
                                "SELECT `id`,`name`,`network`,`pubkey`,`notify` FROM `contact` WHERE `network` = '%s'
@@ -4072,7 +4286,7 @@ class Diaspora
 
                foreach ($recips as $recip) {
                        logger("Send updated profile data for user ".$uid." to contact ".$recip["id"], LOGGER_DEBUG);
-                       self::buildAndTransmit($profile, $recip, "profile", $message, false, "", true);
+                       self::buildAndTransmit($owner, $recip, "profile", $message, false, "", true);
                }
        }
 
@@ -4104,18 +4318,22 @@ class Diaspora
                        return false;
                }
 
-               if (!in_array($r[0]["verb"], array(ACTIVITY_LIKE, ACTIVITY_DISLIKE))) {
+               if (!in_array($r[0]["verb"], [ACTIVITY_LIKE, ACTIVITY_DISLIKE])) {
                        return false;
                }
 
                $message = self::constructLike($r[0], $contact);
+               if ($message === false) {
+                       return false;
+               }
+
                $message["author_signature"] = self::signature($contact, $message);
 
                /*
                 * 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', array('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;
@@ -4141,13 +4359,17 @@ class Diaspora
                $contact["uprvkey"] = $uprvkey;
 
                $message = self::constructComment($item, $contact);
+               if ($message === false) {
+                       return false;
+               }
+
                $message["author_signature"] = self::signature($contact, $message);
 
                /*
                 * 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', array('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;