]> git.mxchange.org Git - friendica.git/blobdiff - src/Protocol/Diaspora.php
Rename BBCode::removeAbstract() to BBCode::stripAbstract()
[friendica.git] / src / Protocol / Diaspora.php
index 1a320d14e2e07bd2867c300fbf9c32e903c17028..bd66f487ac597f2f4d4083f7f1463cf0c8b43b8d 100644 (file)
@@ -1,36 +1,39 @@
 <?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
  * This implementation here interprets the old and the new protocol and sends the new one.
- * In the future we will remove most stuff from "valid_posting" and interpret only the new protocol.
+ * In the future we will remove most stuff from "validPosting" and interpret only the new protocol.
  */
 namespace Friendica\Protocol;
 
-use Friendica\App;
-use Friendica\Core\System;
 use Friendica\Core\Cache;
 use Friendica\Core\Config;
+use Friendica\Core\L10n;
 use Friendica\Core\PConfig;
+use Friendica\Core\System;
 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\Item;
+use Friendica\Model\Profile;
+use Friendica\Model\Queue;
+use Friendica\Model\User;
 use Friendica\Network\Probe;
-use Friendica\Object\Contact;
-use Friendica\Object\Profile;
+use Friendica\Util\Crypto;
+use Friendica\Util\DateTimeFormat;
+use Friendica\Util\Network;
 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';
 
 /**
  * @brief This class contain functions to create and send Diaspora XML files
@@ -38,7 +41,6 @@ require_once 'include/queue_fn.php';
  */
 class Diaspora
 {
-
        /**
         * @brief Return a list of relay servers
         *
@@ -46,14 +48,14 @@ class Diaspora
         *
         * @return array of relay servers
         */
-       public static function relay_list()
+       public static function relayList()
        {
                $serverdata = Config::get("system", "relay_server");
                if ($serverdata == "") {
-                       return array();
+                       return [];
                }
 
-               $relay = array();
+               $relay = [];
 
                $servers = explode(",", $serverdata);
 
@@ -73,7 +75,7 @@ class Diaspora
                                $r = q(
                                        "INSERT INTO `contact` (`uid`, `created`, `name`, `nick`, `addr`, `url`, `nurl`, `batch`, `network`, `rel`, `blocked`, `pending`, `writable`, `name-date`, `uri-date`, `avatar-date`)
                                        VALUES (0, '%s', '%s', 'relay', '%s', '%s', '%s', '%s', '%s', %d, 0, 0, 1, '%s', '%s', '%s')",
-                                       datetime_convert(),
+                                       DateTimeFormat::utcNow(),
                                        dbesc($addr),
                                        dbesc($addr),
                                        dbesc($server),
@@ -81,9 +83,9 @@ class Diaspora
                                        dbesc($batch),
                                        dbesc(NETWORK_DIASPORA),
                                        intval(CONTACT_IS_FOLLOWER),
-                                       dbesc(datetime_convert()),
-                                       dbesc(datetime_convert()),
-                                       dbesc(datetime_convert())
+                                       dbesc(DateTimeFormat::utcNow()),
+                                       dbesc(DateTimeFormat::utcNow()),
+                                       dbesc(DateTimeFormat::utcNow())
                                );
 
                                $relais = q("SELECT `batch`, `id`, `name`,`network` FROM `contact` WHERE `uid` = 0 AND `batch` = '%s' LIMIT 1", dbesc($batch));
@@ -98,6 +100,53 @@ 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 $contacts;
+       }
+
        /**
         * @brief repairs a signature that was double encoded
         *
@@ -109,7 +158,7 @@ class Diaspora
         *
         * @return string the repaired signature
         */
-       private static function repair_signature($signature, $handle = "", $level = 1)
+       private static function repairSignature($signature, $handle = "", $level = 1)
        {
                if ($signature == "") {
                        return ($signature);
@@ -121,7 +170,7 @@ class Diaspora
 
                        // Do a recursive call to be able to fix even multiple levels
                        if ($level < 10) {
-                               $signature = self::repair_signature($signature, $handle, ++$level);
+                               $signature = self::repairSignature($signature, $handle, ++$level);
                        }
                }
 
@@ -135,9 +184,9 @@ class Diaspora
         *
         * @return string verified data
         */
-       private static function verify_magic_envelope($envelope)
+       private static function verifyMagicEnvelope($envelope)
        {
-               $basedom = parse_xml_string($envelope);
+               $basedom = XML::parseString($envelope);
 
                if (!is_object($basedom)) {
                        logger("Envelope is no XML file");
@@ -167,13 +216,13 @@ 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;
@@ -191,7 +240,7 @@ class Diaspora
         *
         * @return string encrypted data
         */
-       private static function aes_encrypt($key, $iv, $data)
+       private static function aesEncrypt($key, $iv, $data)
        {
                return openssl_encrypt($data, 'aes-256-cbc', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
        }
@@ -205,7 +254,7 @@ class Diaspora
         *
         * @return string decrypted data
         */
-       private static function aes_decrypt($key, $iv, $encrypted)
+       private static function aesDecrypt($key, $iv, $encrypted)
        {
                return openssl_decrypt($encrypted, 'aes-256-cbc', str_pad($key, 32, "\0"), OPENSSL_RAW_DATA, str_pad($iv, 16, "\0"));
        }
@@ -221,7 +270,7 @@ class Diaspora
         * 'author' -> author diaspora handle
         * 'key' -> author public key (converted to pkcs#8)
         */
-       public static function decode_raw($importer, $raw)
+       public static function decodeRaw($importer, $raw)
        {
                $data = json_decode($raw);
 
@@ -236,28 +285,28 @@ class Diaspora
 
                        if (!is_object($j_outer_key_bundle)) {
                                logger('Outer Salmon did not verify. Discarding.');
-                               http_status_exit(400);
+                               System::httpExit(400);
                        }
 
                        $outer_iv = base64_decode($j_outer_key_bundle->iv);
                        $outer_key = base64_decode($j_outer_key_bundle->key);
 
-                       $xml = self::aes_decrypt($outer_key, $outer_iv, $ciphertext);
+                       $xml = self::aesDecrypt($outer_key, $outer_iv, $ciphertext);
                } else {
                        $xml = $raw;
                }
 
-               $basedom = parse_xml_string($xml);
+               $basedom = XML::parseString($xml);
 
                if (!is_object($basedom)) {
                        logger('Received data does not seem to be an XML. Discarding. '.$xml);
-                       http_status_exit(400);
+                       System::httpExit(400);
                }
 
                $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 +322,15 @@ 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);
+                       System::httpExit(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];
        }
 
        /**
@@ -298,7 +347,7 @@ class Diaspora
        public static function decode($importer, $xml)
        {
                $public = false;
-               $basedom = parse_xml_string($xml);
+               $basedom = XML::parseString($xml);
 
                if (!is_object($basedom)) {
                        logger("XML is not parseable.");
@@ -329,10 +378,10 @@ class Diaspora
                        $outer_iv = base64_decode($j_outer_key_bundle->iv);
                        $outer_key = base64_decode($j_outer_key_bundle->key);
 
-                       $decrypted = self::aes_decrypt($outer_key, $outer_iv, $ciphertext);
+                       $decrypted = self::aesDecrypt($outer_key, $outer_iv, $ciphertext);
 
                        logger('decrypted: '.$decrypted, LOGGER_DEBUG);
-                       $idom = parse_xml_string($decrypted);
+                       $idom = XML::parseString($decrypted);
 
                        $inner_iv = base64_decode($idom->iv);
                        $inner_aes_key = base64_decode($idom->aes_key);
@@ -354,7 +403,7 @@ class Diaspora
 
                if (!$base) {
                        logger('unable to locate salmon data in xml');
-                       http_status_exit(400);
+                       System::httpExit(400);
                }
 
 
@@ -364,7 +413,7 @@ 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
@@ -387,12 +436,12 @@ class Diaspora
                } else {
                        // Decode the encrypted blob
                        $inner_encrypted = base64_decode($data);
-                       $inner_decrypted = self::aes_decrypt($inner_aes_key, $inner_iv, $inner_encrypted);
+                       $inner_decrypted = self::aesDecrypt($inner_aes_key, $inner_iv, $inner_encrypted);
                }
 
                if (!$author_link) {
                        logger('Could not retrieve author URI.');
-                       http_status_exit(400);
+                       System::httpExit(400);
                }
                // Once we have the author URI, go to the web and try to find their public key
                // (first this will look it up locally if it is in the fcontact cache)
@@ -403,21 +452,21 @@ class Diaspora
 
                if (!$key) {
                        logger('Could not retrieve author key.');
-                       http_status_exit(400);
+                       System::httpExit(400);
                }
 
-               $verify = rsa_verify($signed_data, $signature, $key);
+               $verify = Crypto::rsaVerify($signed_data, $signature, $key);
 
                if (!$verify) {
                        logger('Message did not verify. Discarding.');
-                       http_status_exit(400);
+                       System::httpExit(400);
                }
 
                logger('Message verified.');
 
-               return array('message' => (string)$inner_decrypted,
+               return ['message' => (string)$inner_decrypted,
                                'author' => unxmlify($author_link),
-                               'key' => (string)$key);
+                               'key' => (string)$key];
        }
 
 
@@ -428,7 +477,7 @@ class Diaspora
         *
         * @return int The message id of the generated message, "true" or "false" if there was an error
         */
-       public static function dispatch_public($msg)
+       public static function dispatchPublic($msg)
        {
                $enabled = intval(Config::get("system", "diaspora_enabled"));
                if (!$enabled) {
@@ -436,7 +485,7 @@ class Diaspora
                        return false;
                }
 
-               if (!($postdata = self::valid_posting($msg))) {
+               if (!($postdata = self::validPosting($msg))) {
                        logger("Invalid posting");
                        return false;
                }
@@ -446,7 +495,7 @@ class Diaspora
                // Is it a an action (comment, like, ...) for our own post?
                if (isset($fields->parent_guid) && !$postdata["relayed"]) {
                        $guid = notags(unxmlify($fields->parent_guid));
-                       $importer = self::importer_for_guid($guid);
+                       $importer = self::importerForGuid($guid);
                        if (is_array($importer)) {
                                logger("delivering to origin: ".$importer["name"]);
                                $message_id = self::dispatch($importer, $msg, $fields);
@@ -456,11 +505,11 @@ 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 $message_id;
                        }
@@ -484,7 +533,7 @@ class Diaspora
                        logger("Unwanted message from ".$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);
                }
 
@@ -508,7 +557,7 @@ class Diaspora
 
                // This is only needed for private postings since this is already done for public ones before
                if (is_null($fields)) {
-                       if (!($postdata = self::valid_posting($msg))) {
+                       if (!($postdata = self::validPosting($msg))) {
                                logger("Invalid posting");
                                return false;
                        }
@@ -524,43 +573,43 @@ class Diaspora
                                return self::receiveAccountMigration($importer, $fields);
 
                        case "account_deletion":
-                               return self::receive_account_deletion($importer, $fields);
+                               return self::receiveAccountDeletion($importer, $fields);
 
                        case "comment":
-                               return self::receive_comment($importer, $sender, $fields, $msg["message"]);
+                               return self::receiveComment($importer, $sender, $fields, $msg["message"]);
 
                        case "contact":
-                               return self::receive_contact_request($importer, $fields);
+                               return self::receiveContactRequest($importer, $fields);
 
                        case "conversation":
-                               return self::receive_conversation($importer, $msg, $fields);
+                               return self::receiveConversation($importer, $msg, $fields);
 
                        case "like":
-                               return self::receive_like($importer, $sender, $fields);
+                               return self::receiveLike($importer, $sender, $fields);
 
                        case "message":
-                               return self::receive_message($importer, $fields);
+                               return self::receiveMessage($importer, $fields);
 
-                       case "participation": // Not implemented
-                               return self::receive_participation($importer, $fields);
+                       case "participation":
+                               return self::receiveParticipation($importer, $fields);
 
                        case "photo": // Not implemented
-                               return self::receive_photo($importer, $fields);
+                               return self::receivePhoto($importer, $fields);
 
                        case "poll_participation": // Not implemented
-                               return self::receive_poll_participation($importer, $fields);
+                               return self::receivePollParticipation($importer, $fields);
 
                        case "profile":
-                               return self::receive_profile($importer, $fields);
+                               return self::receiveProfile($importer, $fields);
 
                        case "reshare":
-                               return self::receive_reshare($importer, $fields, $msg["message"]);
+                               return self::receiveReshare($importer, $fields, $msg["message"]);
 
                        case "retraction":
-                               return self::receive_retraction($importer, $sender, $fields);
+                               return self::receiveRetraction($importer, $sender, $fields);
 
                        case "status_message":
-                               return self::receive_status_message($importer, $fields, $msg["message"]);
+                               return self::receiveStatusMessage($importer, $fields, $msg["message"]);
 
                        default:
                                logger("Unknown message type ".$type);
@@ -580,9 +629,9 @@ class Diaspora
         *
         * @return bool|array If the posting is valid then an array with an SimpleXML object is returned
         */
-       private static function valid_posting($msg)
+       private static function validPosting($msg)
        {
-               $data = parse_xml_string($msg["message"]);
+               $data = XML::parseString($msg["message"]);
 
                if (!is_object($data)) {
                        logger("No valid XML ".$msg["message"], LOGGER_DEBUG);
@@ -609,7 +658,7 @@ 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 ($type == "request") {
@@ -629,7 +678,7 @@ class Diaspora
                                if ($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 +711,14 @@ 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 +726,7 @@ 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 +734,8 @@ 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 +748,7 @@ 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 +758,11 @@ 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];
                }
        }
 
@@ -731,7 +779,7 @@ class Diaspora
 
                logger("Fetching diaspora key for: ".$handle);
 
-               $r = self::person_by_handle($handle);
+               $r = self::personByHandle($handle);
                if ($r) {
                        return $r["pubkey"];
                }
@@ -746,7 +794,7 @@ class Diaspora
         *
         * @return array the queried data
         */
-       public static function person_by_handle($handle)
+       public static function personByHandle($handle)
        {
                $r = q(
                        "SELECT * FROM `fcontact` WHERE `network` = '%s' AND `addr` = '%s' LIMIT 1",
@@ -775,7 +823,7 @@ class Diaspora
                        // Note that Friendica contacts will return a "Diaspora person"
                        // if Diaspora connectivity is enabled on their server
                        if ($r && ($r["network"] === NETWORK_DIASPORA)) {
-                               self::add_fcontact($r, $update);
+                               self::addFContact($r, $update);
                                $person = $r;
                        }
                }
@@ -790,7 +838,7 @@ class Diaspora
         *
         * @return string The id of the fcontact entry
         */
-       private static function add_fcontact($arr, $update = false)
+       private static function addFContact($arr, $update = false)
        {
                if ($update) {
                        $r = q(
@@ -821,7 +869,7 @@ class Diaspora
                                dbesc($arr["confirm"]),
                                dbesc($arr["alias"]),
                                dbesc($arr["pubkey"]),
-                               dbesc(datetime_convert()),
+                               dbesc(DateTimeFormat::utcNow()),
                                dbesc($arr["url"]),
                                dbesc($arr["network"])
                        );
@@ -844,7 +892,7 @@ class Diaspora
                                dbesc($arr["network"]),
                                dbesc($arr["alias"]),
                                dbesc($arr["pubkey"]),
-                               dbesc(datetime_convert())
+                               dbesc(DateTimeFormat::utcNow())
                        );
                }
 
@@ -859,7 +907,7 @@ class Diaspora
         *
         * @return string the handle
         */
-       public static function handle_from_contact($contact_id, $gcontact_id = 0)
+       public static function handleFromContact($contact_id, $gcontact_id = 0)
        {
                $handle = false;
 
@@ -908,7 +956,7 @@ class Diaspora
         *
         * @return string the contact url or null
         */
-       public static function url_from_contact_guid($fcontact_guid)
+       public static function urlFromContactGuid($fcontact_guid)
        {
                logger("fcontact guid is ".$fcontact_guid, LOGGER_DEBUG);
 
@@ -928,12 +976,14 @@ 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 $handle The handle in the format user@domain.tld
         *
-        * @return The contact id
+        * @return int Contact id
         */
-       private static function contact_by_handle($uid, $handle)
+       private static function contactByHandle($uid, $handle)
        {
                // First do a direct search on the contact table
                $r = q(
@@ -986,37 +1036,39 @@ class Diaspora
         *
         * @return bool is the contact allowed to post?
         */
-       private static function post_allow($importer, $contact, $is_comment = false) {
-
+       private static function postAllow($importer, $contact, $is_comment = false)
+       {
                /*
                 * Perhaps we were already sharing with this person. Now they're sharing with us.
                 * That makes us friends.
                 * Normally this should have handled by getting a request - but this could get lost
                 */
-               if ($contact["rel"] == CONTACT_IS_FOLLOWER && in_array($importer["page-flags"], array(PAGE_FREELOVE))) {
-                       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"] || $contact["archive"]) {
                        // Maybe blocked, don't accept.
                        return false;
-               // We are following this person?
+                       // We are following this person?
                } elseif (($contact["rel"] == CONTACT_IS_SHARING) || ($contact["rel"] == CONTACT_IS_FRIEND)) {
                        // Yes, then it is fine.
                        return true;
-               // Is it a post to a community?
+                       // Is it a post to a community?
                } elseif (($contact["rel"] == CONTACT_IS_FOLLOWER) && ($importer["page-flags"] == PAGE_COMMUNITY)) {
                        // That's good
                        return true;
-               // Is the message a global user or a comment?
+                       // Is the message a global user or a comment?
                } elseif (($importer["uid"] == 0) || $is_comment) {
                        // Messages for the global users and comments are always accepted
                        return true;
@@ -1034,9 +1086,9 @@ class Diaspora
         *
         * @return array The contact data
         */
-       private static function allowed_contact_by_handle($importer, $handle, $is_comment = false)
+       private static function allowedContactByHandle($importer, $handle, $is_comment = false)
        {
-               $contact = self::contact_by_handle($importer["uid"], $handle);
+               $contact = self::contactByHandle($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
@@ -1047,7 +1099,7 @@ class Diaspora
                        }
                }
 
-               if (!self::post_allow($importer, $contact, $is_comment)) {
+               if (!self::postAllow($importer, $contact, $is_comment)) {
                        logger("The handle: ".$handle." is not allowed to post to user ".$importer["uid"]);
                        return false;
                }
@@ -1062,7 +1114,7 @@ class Diaspora
         *
         * @return int|bool message id if the message already was stored into the system - or false.
         */
-       private static function message_exists($uid, $guid)
+       private static function messageExists($uid, $guid)
        {
                $r = q(
                        "SELECT `id` FROM `item` WHERE `uid` = %d AND `guid` = '%s' LIMIT 1",
@@ -1082,14 +1134,15 @@ class Diaspora
         * @brief Checks for links to posts in a message
         *
         * @param array $item The item array
+        * @return void
         */
-       private static function fetch_guid($item)
+       private static function fetchGuid($item)
        {
                $expression = "=diaspora://.*?/post/([0-9A-Za-z\-_@.:]{15,254}[0-9A-Za-z])=ism";
                preg_replace_callback(
                        $expression,
                        function ($match) use ($item) {
-                               return self::fetch_guid_sub($match, $item);
+                               self::fetchGuidSub($match, $item);
                        },
                        $item["body"]
                );
@@ -1097,7 +1150,7 @@ class Diaspora
                preg_replace_callback(
                        "&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi",
                        function ($match) use ($item) {
-                               return self::fetch_guid_sub($match, $item);
+                               self::fetchGuidSub($match, $item);
                        },
                        $item["body"]
                );
@@ -1110,9 +1163,9 @@ class Diaspora
         * @param string $body        The item body to replace links from
         * @param string $author_link The author link for missing local contact fallback
         *
-        * @return the replaced string
+        * @return string the replaced string
         */
-       public static function replace_people_guid($body, $author_link)
+       public static function replacePeopleGuid($body, $author_link)
        {
                $return = preg_replace_callback(
                        "&\[url=/people/([^\[\]]*)\](.*)\[\/url\]&Usi",
@@ -1121,7 +1174,7 @@ class Diaspora
                                // 0 => '[url=/people/0123456789abcdef]Foo Bar[/url]'
                                // 1 => '0123456789abcdef'
                                // 2 => 'Foo Bar'
-                               $handle = self::url_from_contact_guid($match[1]);
+                               $handle = self::urlFromContactGuid($match[1]);
 
                                if ($handle) {
                                        $return = '@[url='.$handle.']'.$match[2].'[/url]';
@@ -1140,15 +1193,16 @@ class Diaspora
        }
 
        /**
-        * @brief sub function of "fetch_guid" which checks for links in messages
+        * @brief sub function of "fetchGuid" which checks for links in messages
         *
         * @param array $match array containing a link that has to be checked for a message link
         * @param array $item  The item array
+        * @return void
         */
-       private static function fetch_guid_sub($match, $item)
+       private static function fetchGuidSub($match, $item)
        {
-               if (!self::store_by_guid($match[1], $item["author-link"])) {
-                       self::store_by_guid($match[1], $item["owner-link"]);
+               if (!self::storeByGuid($match[1], $item["author-link"])) {
+                       self::storeByGuid($match[1], $item["owner-link"]);
                }
        }
 
@@ -1161,7 +1215,7 @@ class Diaspora
         *
         * @return int the message id of the stored message or false
         */
-       private static function store_by_guid($guid, $server, $uid = 0)
+       private static function storeByGuid($guid, $server, $uid = 0)
        {
                $serverparts = parse_url($server);
                $server = $serverparts["scheme"]."://".$serverparts["host"];
@@ -1177,7 +1231,7 @@ class Diaspora
                logger("Successfully fetched item ".$guid." from ".$server, LOGGER_DEBUG);
 
                // Now call the dispatcher
-               return self::dispatch_public($msg);
+               return self::dispatchPublic($msg);
        }
 
        /**
@@ -1203,10 +1257,10 @@ class Diaspora
 
                logger("Fetch post from ".$source_url, LOGGER_DEBUG);
 
-               $envelope = fetch_url($source_url);
+               $envelope = Network::fetchUrl($source_url);
                if ($envelope) {
                        logger("Envelope was fetched.", LOGGER_DEBUG);
-                       $x = self::verify_magic_envelope($envelope);
+                       $x = self::verifyMagicEnvelope($envelope);
                        if (!$x) {
                                logger("Envelope could not be verified.", LOGGER_DEBUG);
                        } else {
@@ -1221,13 +1275,13 @@ class Diaspora
                        $source_url = $server."/p/".urlencode($guid).".xml";
                        logger("Fetch post from ".$source_url, LOGGER_DEBUG);
 
-                       $x = fetch_url($source_url);
+                       $x = Network::fetchUrl($source_url);
                        if (!$x) {
                                return false;
                        }
                }
 
-               $source_xml = parse_xml_string($x);
+               $source_xml = XML::parseString($x);
 
                if (!is_object($source_xml)) {
                        return false;
@@ -1258,7 +1312,7 @@ class Diaspora
                        return false;
                }
 
-               $msg = array("message" => $x, "author" => $author);
+               $msg = ["message" => $x, "author" => $author];
 
                $msg["key"] = self::key($msg["author"]);
 
@@ -1275,7 +1329,7 @@ class Diaspora
         *
         * @return array the item record
         */
-       private static function parent_item($uid, $guid, $author, $contact)
+       private static function parentItem($uid, $guid, $author, $contact)
        {
                $r = q(
                        "SELECT `id`, `parent`, `body`, `wall`, `uri`, `guid`, `private`, `origin`,
@@ -1287,11 +1341,11 @@ class Diaspora
                );
 
                if (!$r) {
-                       $result = self::store_by_guid($guid, $contact["url"], $uid);
+                       $result = self::storeByGuid($guid, $contact["url"], $uid);
 
                        if (!$result) {
-                               $person = self::person_by_handle($author);
-                               $result = self::store_by_guid($guid, $person["url"], $uid);
+                               $person = self::personByHandle($author);
+                               $result = self::storeByGuid($guid, $person["url"], $uid);
                        }
 
                        if ($result) {
@@ -1328,7 +1382,7 @@ class Diaspora
         *      'cid' => contact id
         *      'network' => network type
         */
-       private static function author_contact_by_url($contact, $person, $uid)
+       private static function authorContactByUrl($contact, $person, $uid)
        {
                $r = q(
                        "SELECT `id`, `network`, `url` FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d LIMIT 1",
@@ -1338,16 +1392,12 @@ class Diaspora
                if ($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];
        }
 
        /**
@@ -1357,7 +1407,7 @@ class Diaspora
         *
         * @return bool is it a hubzilla server?
         */
-       public static function is_redmatrix($url)
+       public static function isRedmatrix($url)
        {
                return(strstr($url, "/channel/"));
        }
@@ -1395,7 +1445,7 @@ class Diaspora
                        return str_replace("/profile/".$r[0]["nick"]."/", "/display/".$guid, $r[0]["url"]."/");
                }
 
-               if (self::is_redmatrix($r[0]["url"])) {
+               if (self::isRedmatrix($r[0]["url"])) {
                        return $r[0]["url"]."/?f=&mid=".$guid;
                }
 
@@ -1420,7 +1470,7 @@ class Diaspora
                $new_handle = notags(unxmlify($data->profile->author));
                $signature = notags(unxmlify($data->signature));
 
-               $contact = self::contact_by_handle($importer["uid"], $old_handle);
+               $contact = self::contactByHandle($importer["uid"], $old_handle);
                if (!$contact) {
                        logger("cannot find contact for sender: ".$old_handle." and user ".$importer["uid"]);
                        return false;
@@ -1431,13 +1481,13 @@ 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;
                }
 
                // Update the profile
-               self::receive_profile($importer, $data->profile);
+               self::receiveProfile($importer, $data->profile);
 
                // change the technical stuff in contact and gcontact
                $data = Probe::uri($new_handle);
@@ -1446,30 +1496,30 @@ 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) {
                        $r = q(
                                "SELECT `id` FROM `item` WHERE `%s` = '%s' AND `uid` = %d LIMIT 1",
@@ -1507,13 +1557,13 @@ class Diaspora
         *
         * @return bool Success
         */
-       private static function receive_account_deletion($importer, $data)
+       private static function receiveAccountDeletion($importer, $data)
        {
                /// @todo Account deletion should remove the contact from the global contacts as well
 
                $author = notags(unxmlify($data->author));
 
-               $contact = self::contact_by_handle($importer["uid"], $author);
+               $contact = self::contactByHandle($importer["uid"], $author);
                if (!$contact) {
                        logger("cannot find contact for author: ".$author);
                        return false;
@@ -1533,7 +1583,7 @@ class Diaspora
         *
         * @return string The constructed uri or the one from our database
         */
-       private static function get_uri_from_guid($author, $guid, $onlyfound = false)
+       private static function getUriFromGuid($author, $guid, $onlyfound = false)
        {
                $r = q("SELECT `uri` FROM `item` WHERE `guid` = '%s' LIMIT 1", dbesc($guid));
                if (DBM::is_result($r)) {
@@ -1553,7 +1603,7 @@ class Diaspora
         *
         * @return string The post guid
         */
-       private static function get_guid_from_uri($uri, $uid)
+       private static function getGuidFromUri($uri, $uid)
        {
                $r = q("SELECT `guid` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1", dbesc($uri), intval($uid));
                if (DBM::is_result($r)) {
@@ -1570,7 +1620,7 @@ class Diaspora
         *
         * @return array|boolean the origin owner of that post - or false
         */
-       private static function importer_for_guid($guid)
+       private static function importerForGuid($guid)
        {
                $item = dba::fetch_first("SELECT `uid` FROM `item` WHERE `origin` AND `guid` = ? LIMIT 1", $guid);
 
@@ -1594,7 +1644,7 @@ class Diaspora
         *
         * @return int The message id of the generated comment or "false" if there was an error
         */
-       private static function receive_comment($importer, $sender, $data, $xml)
+       private static function receiveComment($importer, $sender, $data, $xml)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
@@ -1602,43 +1652,43 @@ class Diaspora
                $text = unxmlify($data->text);
 
                if (isset($data->created_at)) {
-                       $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
+                       $created_at = DateTimeFormat::utc(notags(unxmlify($data->created_at)));
                } else {
-                       $created_at = datetime_convert();
+                       $created_at = DateTimeFormat::utcNow();
                }
 
                if (isset($data->thread_parent_guid)) {
                        $thread_parent_guid = notags(unxmlify($data->thread_parent_guid));
-                       $thr_uri = self::get_uri_from_guid("", $thread_parent_guid, true);
+                       $thr_uri = self::getUriFromGuid("", $thread_parent_guid, true);
                } else {
                        $thr_uri = "";
                }
 
-               $contact = self::allowed_contact_by_handle($importer, $sender, true);
+               $contact = self::allowedContactByHandle($importer, $sender, true);
                if (!$contact) {
                        return false;
                }
 
-               $message_id = self::message_exists($importer["uid"], $guid);
+               $message_id = self::messageExists($importer["uid"], $guid);
                if ($message_id) {
                        return true;
                }
 
-               $parent_item = self::parent_item($importer["uid"], $parent_guid, $author, $contact);
+               $parent_item = self::parentItem($importer["uid"], $parent_guid, $author, $contact);
                if (!$parent_item) {
                        return false;
                }
 
-               $person = self::person_by_handle($author);
+               $person = self::personByHandle($author);
                if (!is_array($person)) {
                        logger("unable to find author details");
                        return false;
                }
 
                // Fetch the contact id - if we know this contact
-               $author_contact = self::author_contact_by_url($contact, $person, $importer["uid"]);
+               $author_contact = self::authorContactByUrl($contact, $person, $importer["uid"]);
 
-               $datarray = array();
+               $datarray = [];
 
                $datarray["uid"] = $importer["uid"];
                $datarray["contact-id"] = $author_contact["cid"];
@@ -1653,7 +1703,7 @@ class Diaspora
                $datarray["owner-avatar"] = ((x($contact, "thumb")) ? $contact["thumb"] : $contact["photo"]);
 
                $datarray["guid"] = $guid;
-               $datarray["uri"] = self::get_uri_from_guid($author, $guid);
+               $datarray["uri"] = self::getUriFromGuid($author, $guid);
 
                $datarray["type"] = "remote-comment";
                $datarray["verb"] = ACTIVITY_POST;
@@ -1676,11 +1726,11 @@ class Diaspora
 
                $body = diaspora2bb($text);
 
-               $datarray["body"] = self::replace_people_guid($body, $person["url"]);
+               $datarray["body"] = self::replacePeopleGuid($body, $person["url"]);
 
-               self::fetch_guid($datarray);
+               self::fetchGuid($datarray);
 
-               $message_id = item_store($datarray);
+               $message_id = Item::insert($datarray);
 
                if ($message_id <= 0) {
                        return false;
@@ -1694,7 +1744,7 @@ class Diaspora
                if ($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", $message_id);
@@ -1715,7 +1765,7 @@ class Diaspora
         *
         * @return bool "true" if it was successful
         */
-       private static function receive_conversation_message($importer, $contact, $data, $msg, $mesg, $conversation)
+       private static function receiveConversationMessage($importer, $contact, $data, $msg, $mesg, $conversation)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
@@ -1734,7 +1784,7 @@ class Diaspora
                $msg_guid = notags(unxmlify($mesg->guid));
                $msg_conversation_guid = notags(unxmlify($mesg->conversation_guid));
                $msg_text = unxmlify($mesg->text);
-               $msg_created_at = datetime_convert("UTC", "UTC", notags(unxmlify($mesg->created_at)));
+               $msg_created_at = DateTimeFormat::utc(notags(unxmlify($mesg->created_at)));
 
                if ($msg_conversation_guid != $guid) {
                        logger("message conversation guid does not belong to the current conversation.");
@@ -1744,7 +1794,7 @@ class Diaspora
                $body = diaspora2bb($msg_text);
                $message_uri = $msg_author.":".$msg_guid;
 
-               $person = self::person_by_handle($msg_author);
+               $person = self::personByHandle($msg_author);
 
                dba::lock('mail');
 
@@ -1779,23 +1829,23 @@ class Diaspora
 
                dba::unlock();
 
-               dba::update('conv', array('updated' => datetime_convert()), array('id' => $conversation["id"]));
+               dba::update('conv', ['updated' => DateTimeFormat::utcNow()], ['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;
        }
 
@@ -1808,12 +1858,12 @@ class Diaspora
         *
         * @return bool Success
         */
-       private static function receive_conversation($importer, $msg, $data)
+       private static function receiveConversation($importer, $msg, $data)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
                $subject = notags(unxmlify($data->subject));
-               $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
+               $created_at = DateTimeFormat::utc(notags(unxmlify($data->created_at)));
                $participants = notags(unxmlify($data->participants));
 
                $messages = $data->message;
@@ -1823,7 +1873,7 @@ class Diaspora
                        return false;
                }
 
-               $contact = self::allowed_contact_by_handle($importer, $msg["author"], true);
+               $contact = self::allowedContactByHandle($importer, $msg["author"], true);
                if (!$contact) {
                        return false;
                }
@@ -1845,7 +1895,7 @@ class Diaspora
                                dbesc($guid),
                                dbesc($author),
                                dbesc($created_at),
-                               dbesc(datetime_convert()),
+                               dbesc(DateTimeFormat::utcNow()),
                                dbesc($subject),
                                dbesc($participants)
                        );
@@ -1867,7 +1917,7 @@ class Diaspora
                }
 
                foreach ($messages as $mesg) {
-                       self::receive_conversation_message($importer, $contact, $data, $msg, $mesg, $conversation);
+                       self::receiveConversationMessage($importer, $contact, $data, $msg, $mesg, $conversation);
                }
 
                return true;
@@ -1882,12 +1932,13 @@ class Diaspora
         *
         * @return string the body
         */
-       private static function construct_like_body($contact, $parent_item, $guid) {
-               $bodyverb = t('%1$s likes %2$s\'s %3$s');
+       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)."]".t("status")."[/url]";
+               $plink = "[url=".System::baseUrl()."/display/".urlencode($guid)."]".L10n::t("status")."[/url]";
 
                return sprintf($bodyverb, $ulink, $alink, $plink);
        }
@@ -1900,18 +1951,18 @@ class Diaspora
         *
         * @return string The XML
         */
-       private static function construct_like_object($importer, $parent_item)
+       private static function constructLikeObject($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 = 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, $xml, true);
        }
@@ -1925,7 +1976,7 @@ class Diaspora
         *
         * @return int The message id of the generated like or "false" if there was an error
         */
-       private static function receive_like($importer, $sender, $data)
+       private static function receiveLike($importer, $sender, $data)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
@@ -1935,33 +1986,33 @@ 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;
                }
 
-               $contact = self::allowed_contact_by_handle($importer, $sender, true);
+               $contact = self::allowedContactByHandle($importer, $sender, true);
                if (!$contact) {
                        return false;
                }
 
-               $message_id = self::message_exists($importer["uid"], $guid);
+               $message_id = self::messageExists($importer["uid"], $guid);
                if ($message_id) {
                        return true;
                }
 
-               $parent_item = self::parent_item($importer["uid"], $parent_guid, $author, $contact);
+               $parent_item = self::parentItem($importer["uid"], $parent_guid, $author, $contact);
                if (!$parent_item) {
                        return false;
                }
 
-               $person = self::person_by_handle($author);
+               $person = self::personByHandle($author);
                if (!is_array($person)) {
                        logger("unable to find author details");
                        return false;
                }
 
                // Fetch the contact id - if we know this contact
-               $author_contact = self::author_contact_by_url($contact, $person, $importer["uid"]);
+               $author_contact = self::authorContactByUrl($contact, $person, $importer["uid"]);
 
                // "positive" = "false" would be a Dislike - wich isn't currently supported by Diaspora
                // We would accept this anyhow.
@@ -1971,7 +2022,7 @@ class Diaspora
                        $verb = ACTIVITY_DISLIKE;
                }
 
-               $datarray = array();
+               $datarray = [];
 
                $datarray["protocol"] = PROTOCOL_DIASPORA;
 
@@ -1988,7 +2039,7 @@ class Diaspora
                $datarray["owner-avatar"] = ((x($contact, "thumb")) ? $contact["thumb"] : $contact["photo"]);
 
                $datarray["guid"] = $guid;
-               $datarray["uri"] = self::get_uri_from_guid($author, $guid);
+               $datarray["uri"] = self::getUriFromGuid($author, $guid);
 
                $datarray["type"] = "activity";
                $datarray["verb"] = $verb;
@@ -1996,11 +2047,11 @@ class Diaspora
                $datarray["parent-uri"] = $parent_item["uri"];
 
                $datarray["object-type"] = ACTIVITY_OBJ_NOTE;
-               $datarray["object"] = self::construct_like_object($importer, $parent_item);
+               $datarray["object"] = self::constructLikeObject($importer, $parent_item);
 
-               $datarray["body"] = self::construct_like_body($contact, $parent_item, $guid);
+               $datarray["body"] = self::constructLikeBody($contact, $parent_item, $guid);
 
-               $message_id = item_store($datarray);
+               $message_id = Item::insert($datarray);
 
                if ($message_id <= 0) {
                        return false;
@@ -2012,7 +2063,7 @@ 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 = $parent_item["origin"];
@@ -2022,7 +2073,7 @@ class Diaspora
                if ($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", $message_id);
@@ -2039,15 +2090,15 @@ class Diaspora
         *
         * @return bool Success?
         */
-       private static function receive_message($importer, $data)
+       private static function receiveMessage($importer, $data)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
                $conversation_guid = notags(unxmlify($data->conversation_guid));
                $text = unxmlify($data->text);
-               $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
+               $created_at = DateTimeFormat::utc(notags(unxmlify($data->created_at)));
 
-               $contact = self::allowed_contact_by_handle($importer, $author, true);
+               $contact = self::allowedContactByHandle($importer, $author, true);
                if (!$contact) {
                        return false;
                }
@@ -2068,7 +2119,7 @@ class Diaspora
 
                $message_uri = $author.":".$guid;
 
-               $person = self::person_by_handle($author);
+               $person = self::personByHandle($author);
                if (!$person) {
                        logger("unable to find author details");
                        return false;
@@ -2076,7 +2127,7 @@ class Diaspora
 
                $body = diaspora2bb($text);
 
-               $body = self::replace_people_guid($body, $person["url"]);
+               $body = self::replacePeopleGuid($body, $person["url"]);
 
                dba::lock('mail');
 
@@ -2111,7 +2162,7 @@ class Diaspora
 
                dba::unlock();
 
-               dba::update('conv', array('updated' => datetime_convert()), array('id' => $conversation["id"]));
+               dba::update('conv', ['updated' => DateTimeFormat::utcNow()], ['id' => $conversation["id"]]);
                return true;
        }
 
@@ -2123,9 +2174,56 @@ class Diaspora
         *
         * @return bool always true
         */
-       private static function receive_participation($importer, $data)
+       private static function receiveParticipation($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;
        }
 
@@ -2137,7 +2235,7 @@ class Diaspora
         *
         * @return bool always true
         */
-       private static function receive_photo($importer, $data)
+       private static function receivePhoto($importer, $data)
        {
                // There doesn't seem to be a reason for this function,
                // since the photo data is transmitted in the status message as well
@@ -2152,7 +2250,7 @@ class Diaspora
         *
         * @return bool always true
         */
-       private static function receive_poll_participation($importer, $data)
+       private static function receivePollParticipation($importer, $data)
        {
                // We don't support polls by now
                return true;
@@ -2166,11 +2264,11 @@ class Diaspora
         *
         * @return bool Success
         */
-       private static function receive_profile($importer, $data)
+       private static function receiveProfile($importer, $data)
        {
                $author = strtolower(notags(unxmlify($data->author)));
 
-               $contact = self::contact_by_handle($importer["uid"], $author);
+               $contact = self::contactByHandle($importer["uid"], $author);
                if (!$contact) {
                        return false;
                }
@@ -2187,7 +2285,7 @@ class Diaspora
 
                $tags = explode("#", $tags);
 
-               $keywords = array();
+               $keywords = [];
                foreach ($tags as $tag) {
                        $tag = trim(strtolower($tag));
                        if ($tag != "") {
@@ -2208,14 +2306,14 @@ 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.
 
                $birthday = str_replace("1000", "1901", $birthday);
 
                if ($birthday != "") {
-                       $birthday = datetime_convert("UTC", "UTC", $birthday, "Y-m-d");
+                       $birthday = DateTimeFormat::utc($birthday, "Y-m-d");
                }
 
                // this is to prevent multiple birthday notifications in a single year
@@ -2231,7 +2329,7 @@ class Diaspora
                        dbesc($name),
                        dbesc($nick),
                        dbesc($author),
-                       dbesc(datetime_convert()),
+                       dbesc(DateTimeFormat::utcNow()),
                        dbesc($birthday),
                        dbesc($location),
                        dbesc($about),
@@ -2241,15 +2339,15 @@ 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);
 
@@ -2261,16 +2359,17 @@ class Diaspora
         *
         * @param array $importer Array of the importer user
         * @param array $contact  The contact that send the request
+        * @return void
         */
-       private static function receive_request_make_friend($importer, $contact)
+       private static function receiveRequestMakeFriend($importer, $contact)
        {
                $a = get_app();
 
                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
@@ -2281,7 +2380,6 @@ class Diaspora
                );
 
                if ($r && !$r[0]["hide-friends"] && !$contact["hidden"] && intval(PConfig::get($importer["uid"], "system", "post_newfriend"))) {
-
                        $self = q(
                                "SELECT * FROM `contact` WHERE `self` AND `uid` = %d LIMIT 1",
                                intval($importer["uid"])
@@ -2290,7 +2388,7 @@ 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"];
@@ -2308,18 +2406,18 @@ 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;
+                               $arr["body"] = L10n::t('%1$s is now friends with %2$s', $A, $B)."\n\n\n".$BPhoto;
 
-                               $arr["object"] = self::construct_new_friend_object($contact);
+                               $arr["object"] = self::constructNewFriendObject($contact);
 
-                               $arr["last-child"] = 1;
+                               $user = dba::selectFirst('user', ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'], ['uid' => $importer["uid"]]);
 
-                               $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"];
+                               $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);
+                               $i = Item::insert($arr);
                                if ($i) {
                                        Worker::add(PRIORITY_HIGH, "Notifier", "activity", $i);
                                }
@@ -2334,16 +2432,16 @@ class Diaspora
         *
         * @return string The XML
         */
-       private static function construct_new_friend_object($contact)
+       private static function constructNewFriendObject($contact)
        {
                $objtype = ACTIVITY_OBJ_PERSON;
                $link = '<link rel="alternate" type="text/html" href="'.$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, $xml, true);
        }
@@ -2356,7 +2454,7 @@ class Diaspora
         *
         * @return bool Success
         */
-       private static function receive_contact_request($importer, $data)
+       private static function receiveContactRequest($importer, $data)
        {
                $author = unxmlify($data->author);
                $recipient = unxmlify($data->recipient);
@@ -2379,36 +2477,36 @@ class Diaspora
                        $sharing = true;
                }
 
-               $contact = self::contact_by_handle($importer["uid"], $author);
+               $contact = self::contactByHandle($importer["uid"], $author);
 
                // perhaps we were already sharing with this person. Now they're sharing with us.
                // That makes us friends.
                if ($contact) {
                        if ($following) {
                                logger("Author ".$author." (Contact ".$contact["id"].") wants to follow us.", LOGGER_DEBUG);
-                               self::receive_request_make_friend($importer, $contact);
+                               self::receiveRequestMakeFriend($importer, $contact);
 
                                // refetch the contact array
-                               $contact = self::contact_by_handle($importer["uid"], $author);
+                               $contact = self::contactByHandle($importer["uid"], $author);
 
                                // 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);
-                                               $ret = self::send_share($u[0], $contact);
+                                               $ret = self::sendShare($u[0], $contact);
                                        }
                                }
                                return true;
                        } else {
                                logger("Author ".$author." doesn't want to follow us anymore.", LOGGER_DEBUG);
-                               lose_follower($importer, $contact);
+                               Contact::removeFollower($importer, $contact);
                                return true;
                        }
                }
 
-               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 && !$sharing) {
@@ -2422,7 +2520,7 @@ class Diaspora
                        logger("Author ".$author." wants to listen to us.", LOGGER_DEBUG);
                }
 
-               $ret = self::person_by_handle($author);
+               $ret = self::personByHandle($author);
 
                if (!$ret || ($ret["network"] != NETWORK_DIASPORA)) {
                        logger("Cannot resolve diaspora handle ".$author." for ".$recipient);
@@ -2437,7 +2535,7 @@ class Diaspora
                        intval($importer["uid"]),
                        dbesc($ret["network"]),
                        dbesc($ret["addr"]),
-                       datetime_convert(),
+                       DateTimeFormat::utcNow(),
                        dbesc($ret["url"]),
                        dbesc(normalise_link($ret["url"])),
                        dbesc($batch),
@@ -2453,7 +2551,7 @@ class Diaspora
 
                // find the contact record we just created
 
-               $contact_record = self::contact_by_handle($importer["uid"], $author);
+               $contact_record = self::contactByHandle($importer["uid"], $author);
 
                if (!$contact_record) {
                        logger("unable to locate newly created contact record.");
@@ -2462,13 +2560,9 @@ class Diaspora
 
                logger("Author ".$author." was added as contact number ".$contact_record["id"].".", LOGGER_DEBUG);
 
-               $def_gid = get_default_group($importer['uid'], $ret["network"]);
+               Group::addMember(User::getDefaultGroup($importer['uid'], $ret["network"]), $contact_record['id']);
 
-               if (intval($def_gid)) {
-                       group_add_member($importer["uid"], "", $contact_record["id"], $def_gid);
-               }
-
-               update_contact_avatar($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);
@@ -2482,16 +2576,16 @@ class Diaspora
                                intval($contact_record["id"]),
                                0,
                                0,
-                               dbesc(t("Sharing notification from Diaspora network")),
+                               dbesc(L10n::t("Sharing notification from Diaspora network")),
                                dbesc($hash),
-                               dbesc(datetime_convert())
+                               dbesc(DateTimeFormat::utcNow())
                        );
                } else {
                        // automatic friend approval
 
                        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
@@ -2515,18 +2609,18 @@ class Diaspora
                                WHERE `id` = %d
                                ",
                                intval($new_relation),
-                               dbesc(datetime_convert()),
-                               dbesc(datetime_convert()),
+                               dbesc(DateTimeFormat::utcNow()),
+                               dbesc(DateTimeFormat::utcNow()),
                                intval($contact_record["id"])
                        );
 
                        $u = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", intval($importer["uid"]));
                        if ($u) {
                                logger("Sending share message (Relation: ".$new_relation.") to author ".$author." - Contact: ".$contact_record["id"]." - User: ".$importer["uid"], LOGGER_DEBUG);
-                               $ret = self::send_share($u[0], $contact_record);
+                               $ret = self::sendShare($u[0], $contact_record);
 
                                // Send the profile data, maybe it weren't transmitted before
-                               self::send_profile($importer["uid"], array($contact_record));
+                               self::sendProfile($importer["uid"], [$contact_record]);
                        }
                }
 
@@ -2542,7 +2636,7 @@ class Diaspora
         *
         * @return array The fetched item
         */
-       private static function original_item($guid, $orig_author, $author)
+       private static function originalItem($guid, $orig_author, $author)
        {
                // Do we already have this item?
                $r = q(
@@ -2558,12 +2652,12 @@ class Diaspora
                        // Maybe it is already a reshared item?
                        // Then refetch the content, if it is a reshare from a reshare.
                        // If it is a reshared post from another network then reformat to avoid display problems with two share elements
-                       if (self::is_reshare($r[0]["body"], true)) {
-                               $r = array();
-                       } elseif (self::is_reshare($r[0]["body"], false) || strstr($r[0]["body"], "[share")) {
+                       if (self::isReshare($r[0]["body"], true)) {
+                               $r = [];
+                       } elseif (self::isReshare($r[0]["body"], false) || strstr($r[0]["body"], "[share")) {
                                $r[0]["body"] = diaspora2bb(bb2diaspora($r[0]["body"]));
 
-                               $r[0]["body"] = self::replace_people_guid($r[0]["body"], $r[0]["author-link"]);
+                               $r[0]["body"] = self::replacePeopleGuid($r[0]["body"], $r[0]["author-link"]);
 
                                // Add OEmbed and other information to the body
                                $r[0]["body"] = add_page_info_to_body($r[0]["body"], false, true);
@@ -2577,12 +2671,12 @@ class Diaspora
                if (!DBM::is_result($r)) {
                        $server = "https://".substr($orig_author, strpos($orig_author, "@") + 1);
                        logger("1st try: reshared message ".$guid." will be fetched via SSL from the server ".$server);
-                       $item_id = self::store_by_guid($guid, $server);
+                       $item_id = self::storeByGuid($guid, $server);
 
                        if (!$item_id) {
                                $server = "http://".substr($orig_author, strpos($orig_author, "@") + 1);
                                logger("2nd try: reshared message ".$guid." will be fetched without SLL from the server ".$server);
-                               $item_id = self::store_by_guid($guid, $server);
+                               $item_id = self::storeByGuid($guid, $server);
                        }
 
                        if ($item_id) {
@@ -2595,9 +2689,9 @@ class Diaspora
 
                                if (DBM::is_result($r)) {
                                        // If it is a reshared post from another network then reformat to avoid display problems with two share elements
-                                       if (self::is_reshare($r[0]["body"], false)) {
+                                       if (self::isReshare($r[0]["body"], false)) {
                                                $r[0]["body"] = diaspora2bb(bb2diaspora($r[0]["body"]));
-                                               $r[0]["body"] = self::replace_people_guid($r[0]["body"], $r[0]["author-link"]);
+                                               $r[0]["body"] = self::replacePeopleGuid($r[0]["body"], $r[0]["author-link"]);
                                        }
 
                                        return $r[0];
@@ -2616,34 +2710,34 @@ class Diaspora
         *
         * @return int the message id
         */
-       private static function receive_reshare($importer, $data, $xml)
+       private static function receiveReshare($importer, $data, $xml)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
-               $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
+               $created_at = DateTimeFormat::utc(notags(unxmlify($data->created_at)));
                $root_author = notags(unxmlify($data->root_author));
                $root_guid = notags(unxmlify($data->root_guid));
                /// @todo handle unprocessed property "provider_display_name"
                $public = notags(unxmlify($data->public));
 
-               $contact = self::allowed_contact_by_handle($importer, $author, false);
+               $contact = self::allowedContactByHandle($importer, $author, false);
                if (!$contact) {
                        return false;
                }
 
-               $message_id = self::message_exists($importer["uid"], $guid);
+               $message_id = self::messageExists($importer["uid"], $guid);
                if ($message_id) {
                        return true;
                }
 
-               $original_item = self::original_item($root_guid, $root_author, $author);
+               $original_item = self::originalItem($root_guid, $root_author, $author);
                if (!$original_item) {
                        return false;
                }
 
                $orig_url = System::baseUrl()."/display/".$original_item["guid"];
 
-               $datarray = array();
+               $datarray = [];
 
                $datarray["uid"] = $importer["uid"];
                $datarray["contact-id"] = $contact["id"];
@@ -2658,7 +2752,7 @@ class Diaspora
                $datarray["owner-avatar"] = $datarray["author-avatar"];
 
                $datarray["guid"] = $guid;
-               $datarray["uri"] = $datarray["parent-uri"] = self::get_uri_from_guid($author, $guid);
+               $datarray["uri"] = $datarray["parent-uri"] = self::getUriFromGuid($author, $guid);
 
                $datarray["verb"] = ACTIVITY_POST;
                $datarray["gravity"] = GRAVITY_PARENT;
@@ -2685,8 +2779,10 @@ class Diaspora
 
                $datarray["object-type"] = $original_item["object-type"];
 
-               self::fetch_guid($datarray);
-               $message_id = item_store($datarray);
+               self::fetchGuid($datarray);
+               $message_id = Item::insert($datarray);
+
+               self::sendParticipation($contact, $datarray);
 
                if ($message_id) {
                        logger("Stored reshare ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
@@ -2705,13 +2801,13 @@ class Diaspora
         *
         * @return bool success
         */
-       private static function item_retraction($importer, $contact, $data)
+       private static function itemRetraction($importer, $contact, $data)
        {
                $author = notags(unxmlify($data->author));
                $target_guid = notags(unxmlify($data->target_guid));
                $target_type = notags(unxmlify($data->target_type));
 
-               $person = self::person_by_handle($author);
+               $person = self::personByHandle($author);
                if (!is_array($person)) {
                        logger("unable to find author detail for ".$author);
                        return false;
@@ -2722,13 +2818,13 @@ 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)) {
@@ -2738,7 +2834,7 @@ 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"])) {
@@ -2750,13 +2846,13 @@ 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"])
+                                       'edited' => DateTimeFormat::utcNow(),
+                                       'changed' => DateTimeFormat::utcNow()],
+                               ['id' => $item["id"]]
                        );
 
                        // Delete the thread - if it is a starting post and not a comment
@@ -2785,12 +2881,12 @@ class Diaspora
         *
         * @return bool Success
         */
-       private static function receive_retraction($importer, $sender, $data)
+       private static function receiveRetraction($importer, $sender, $data)
        {
                $target_type = notags(unxmlify($data->target_type));
 
-               $contact = self::contact_by_handle($importer["uid"], $sender);
-               if (!$contact && (in_array($target_type, array("Contact", "Person")))) {
+               $contact = self::contactByHandle($importer["uid"], $sender);
+               if (!$contact && (in_array($target_type, ["Contact", "Person"]))) {
                        logger("cannot find contact for sender: ".$sender." and user ".$importer["uid"]);
                        return false;
                }
@@ -2803,7 +2899,7 @@ class Diaspora
                        case "Post":
                        case "Reshare":
                        case "StatusMessage":
-                               return self::item_retraction($importer, $contact, $data);
+                               return self::itemRetraction($importer, $contact, $data);
 
                        case "Contact":
                        case "Person":
@@ -2828,26 +2924,26 @@ class Diaspora
         *
         * @return int The message id of the newly created item
         */
-       private static function receive_status_message($importer, $data, $xml)
+       private static function receiveStatusMessage($importer, $data, $xml)
        {
                $author = notags(unxmlify($data->author));
                $guid = notags(unxmlify($data->guid));
-               $created_at = datetime_convert("UTC", "UTC", notags(unxmlify($data->created_at)));
+               $created_at = DateTimeFormat::utc(notags(unxmlify($data->created_at)));
                $public = notags(unxmlify($data->public));
                $text = unxmlify($data->text);
                $provider_display_name = notags(unxmlify($data->provider_display_name));
 
-               $contact = self::allowed_contact_by_handle($importer, $author, false);
+               $contact = self::allowedContactByHandle($importer, $author, false);
                if (!$contact) {
                        return false;
                }
 
-               $message_id = self::message_exists($importer["uid"], $guid);
+               $message_id = self::messageExists($importer["uid"], $guid);
                if ($message_id) {
                        return true;
                }
 
-               $address = array();
+               $address = [];
                if ($data->location) {
                        foreach ($data->location->children() as $fieldname => $data) {
                                $address[$fieldname] = notags(unxmlify($data));
@@ -2856,7 +2952,7 @@ class Diaspora
 
                $body = diaspora2bb($text);
 
-               $datarray = array();
+               $datarray = [];
 
                // Attach embedded pictures to the body
                if ($data->photo) {
@@ -2870,7 +2966,7 @@ class Diaspora
                        $datarray["object-type"] = ACTIVITY_OBJ_NOTE;
 
                        // Add OEmbed and other information to the body
-                       if (!self::is_redmatrix($contact["url"])) {
+                       if (!self::isRedmatrix($contact["url"])) {
                                $body = add_page_info_to_body($body, false, true);
                        }
                }
@@ -2897,7 +2993,7 @@ class Diaspora
                $datarray["owner-avatar"] = $datarray["author-avatar"];
 
                $datarray["guid"] = $guid;
-               $datarray["uri"] = $datarray["parent-uri"] = self::get_uri_from_guid($author, $guid);
+               $datarray["uri"] = $datarray["parent-uri"] = self::getUriFromGuid($author, $guid);
 
                $datarray["verb"] = ACTIVITY_POST;
                $datarray["gravity"] = GRAVITY_PARENT;
@@ -2905,7 +3001,7 @@ class Diaspora
                $datarray["protocol"] = PROTOCOL_DIASPORA;
                $datarray["source"] = $xml;
 
-               $datarray["body"] = self::replace_people_guid($body, $contact["url"]);
+               $datarray["body"] = self::replacePeopleGuid($body, $contact["url"]);
 
                if ($provider_display_name != "") {
                        $datarray["app"] = $provider_display_name;
@@ -2923,8 +3019,10 @@ class Diaspora
                        $datarray["coord"] = $address["lat"]." ".$address["lng"];
                }
 
-               self::fetch_guid($datarray);
-               $message_id = item_store($datarray);
+               self::fetchGuid($datarray);
+               $message_id = Item::insert($datarray);
+
+               self::sendParticipation($contact, $datarray);
 
                if ($message_id) {
                        logger("Stored item ".$datarray["guid"]." with message id ".$message_id, LOGGER_DEBUG);
@@ -2945,7 +3043,7 @@ class Diaspora
         *
         * @return string the handle in the format user@domain.tld
         */
-       private static function my_handle($contact)
+       private static function myHandle($contact)
        {
                if ($contact["addr"] != "") {
                        return $contact["addr"];
@@ -2974,7 +3072,7 @@ class Diaspora
         *
         * @return string The encrypted data
         */
-       public static function encode_private_data($msg, $user, $contact, $prvkey, $pubkey)
+       public static function encodePrivateData($msg, $user, $contact, $prvkey, $pubkey)
        {
                logger("Message: ".$msg, LOGGER_DATA);
 
@@ -2989,16 +3087,16 @@ class Diaspora
                $iv = openssl_random_pseudo_bytes(16);
                $b_iv = base64_encode($iv);
 
-               $ciphertext = self::aes_encrypt($aes_key, $iv, $msg);
+               $ciphertext = self::aesEncrypt($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 $json_object;
@@ -3012,12 +3110,12 @@ class Diaspora
         *
         * @return string The envelope
         */
-       public static function build_magic_envelope($msg, $user)
+       public static function buildMagicEnvelope($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);
 
-               $key_id = base64url_encode(self::my_handle($user));
+               $key_id = base64url_encode(self::myHandle($user));
                $type = "application/xml";
                $encoding = "base64url";
                $alg = "RSA-SHA256";
@@ -3028,17 +3126,17 @@ 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, $namespaces);
        }
@@ -3055,14 +3153,14 @@ class Diaspora
         *
         * @return string The message that will be transmitted to other servers
         */
-       private static function build_message($msg, $user, $contact, $prvkey, $pubkey, $public = false)
+       private static function buildMessage($msg, $user, $contact, $prvkey, $pubkey, $public = false)
        {
                // The message is put into an envelope with the sender's signature
-               $envelope = self::build_magic_envelope($msg, $user);
+               $envelope = self::buildMagicEnvelope($msg, $user);
 
                // Private messages are put into a second envelope, encrypted with the receivers public key
                if (!$public) {
-                       $envelope = self::encode_private_data($envelope, $user, $contact, $prvkey, $pubkey);
+                       $envelope = self::encodePrivateData($envelope, $user, $contact, $prvkey, $pubkey);
                }
 
                return $envelope;
@@ -3084,7 +3182,7 @@ 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"));
        }
 
        /**
@@ -3109,7 +3207,15 @@ 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;
@@ -3117,13 +3223,13 @@ class Diaspora
 
                logger("transmit: ".$logid."-".$guid." ".$dest_url);
 
-               if (!$queue_run && was_recently_delayed($contact["id"])) {
+               if (!$queue_run && Queue::wasDelayed($contact["id"])) {
                        $return_code = 0;
                } else {
                        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));
+                               Network::post($dest_url."/", $envelope, ["Content-Type: ".$content_type]);
                                $return_code = $a->get_curl_code();
                        } else {
                                logger("test_mode");
@@ -3147,7 +3253,7 @@ class Diaspora
                                logger("add_to_queue ignored - identical item already in queue");
                        } else {
                                // queue message for redelivery
-                               add_to_queue($contact["id"], NETWORK_DIASPORA, $envelope, $public_batch);
+                               Queue::add($contact["id"], NETWORK_DIASPORA, $envelope, $public_batch);
 
                                // The message could not be delivered. We mark the contact as "dead"
                                Contact::markForArchival($contact);
@@ -3169,9 +3275,9 @@ class Diaspora
         *
         * @return string The post XML
         */
-       public static function build_post_xml($type, $message)
+       public static function buildPostXml($type, $message)
        {
-               $data = array($type => $message);
+               $data = [$type => $message];
 
                return XML::fromArray($data, $xml);
        }
@@ -3189,9 +3295,9 @@ class Diaspora
         *
         * @return int Result of the transmission
         */
-       private static function build_and_transmit($owner, $contact, $type, $message, $public_batch = false, $guid = "", $spool = false)
+       private static function buildAndTransmit($owner, $contact, $type, $message, $public_batch = false, $guid = "", $spool = false)
        {
-               $msg = self::build_post_xml($type, $message);
+               $msg = self::buildPostXml($type, $message);
 
                logger('message: '.$msg, LOGGER_DATA);
                logger('send guid '.$guid, LOGGER_DEBUG);
@@ -3201,20 +3307,68 @@ class Diaspora
                        $owner['uprvkey'] = $owner['prvkey'];
                }
 
-               $envelope = self::build_message($msg, $owner, $contact, $owner['uprvkey'], $contact['pubkey'], $public_batch);
+               $envelope = self::buildMessage($msg, $owner, $contact, $owner['uprvkey'], $contact['pubkey'], $public_batch);
 
                if ($spool) {
-                       add_to_queue($contact['id'], NETWORK_DIASPORA, $envelope, $public_batch);
+                       Queue::add($contact['id'], NETWORK_DIASPORA, $envelope, $public_batch);
                        return true;
                } else {
                        $return_code = self::transmit($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
         *
@@ -3230,15 +3384,15 @@ 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);
 
-               return self::build_and_transmit($owner, $contact, "account_migration", $message);
+               return self::buildAndTransmit($owner, $contact, "account_migration", $message);
        }
 
        /**
@@ -3249,13 +3403,13 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function send_share($owner, $contact)
+       public static function sendShare($owner, $contact)
        {
                /**
                 * @todo support the different possible combinations of "following" and "sharing"
                 * Currently, Diaspora only interprets the "sharing" field
                 *
-                * Before switching this code productive, we have to check all "send_share" calls if "rel" is set correctly
+                * Before switching this code productive, we have to check all "sendShare" calls if "rel" is set correctly
                 */
 
                /*
@@ -3272,14 +3426,14 @@ class Diaspora
                }
                */
 
-               $message = array("author" => self::my_handle($owner),
+               $message = ["author" => self::myHandle($owner),
                                "recipient" => $contact["addr"],
                                "following" => "true",
-                               "sharing" => "true");
+                               "sharing" => "true"];
 
                logger("Send share ".print_r($message, true), LOGGER_DEBUG);
 
-               return self::build_and_transmit($owner, $contact, "contact", $message);
+               return self::buildAndTransmit($owner, $contact, "contact", $message);
        }
 
        /**
@@ -3292,14 +3446,14 @@ class Diaspora
         */
        public static function sendUnshare($owner, $contact)
        {
-               $message = array("author" => self::my_handle($owner),
+               $message = ["author" => self::myHandle($owner),
                                "recipient" => $contact["addr"],
                                "following" => "false",
-                               "sharing" => "false");
+                               "sharing" => "false"];
 
                logger("Send unshare ".print_r($message, true), LOGGER_DEBUG);
 
-               return self::build_and_transmit($owner, $contact, "contact", $message);
+               return self::buildAndTransmit($owner, $contact, "contact", $message);
        }
 
        /**
@@ -3310,7 +3464,7 @@ class Diaspora
         *
         * @return array|bool Reshare details or "false" if no reshare
         */
-       public static function is_reshare($body, $complete = true)
+       public static function isReshare($body, $complete = true)
        {
                $body = trim($body);
 
@@ -3355,8 +3509,8 @@ class Diaspora
                                NETWORK_DIASPORA
                        );
                        if ($r) {
-                               $ret= array();
-                               $ret["root_handle"] = self::handle_from_contact($r[0]["contact-id"]);
+                               $ret= [];
+                               $ret["root_handle"] = self::handleFromContact($r[0]["contact-id"]);
                                $ret["root_guid"] = $guid;
                                return($ret);
                        }
@@ -3373,7 +3527,7 @@ 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"] == "")) {
@@ -3406,38 +3560,38 @@ class Diaspora
         *
         * @return array with event data
         */
-       private static function build_event($event_id)
+       private static function buildEvent($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)) {
-                       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];
 
-               $eventdata['author'] = self::my_handle($owner);
+               $eventdata['author'] = self::myHandle($owner);
 
                if ($event['guid']) {
                        $eventdata['guid'] = $event['guid'];
                }
 
-               $mask = 'Y-m-d\TH:i:s\Z';
+               $mask = DateTimeFormat::ATOM;
 
                /// @todo - establish "all day" events in Friendica
                $eventdata["all_day"] = "false";
@@ -3451,10 +3605,10 @@ class Diaspora
                }
 
                if ($event['start']) {
-                       $eventdata['start'] = datetime_convert($eventdata['timezone'], "UTC", $event['start'], $mask);
+                       $eventdata['start'] = DateTimeFormat::convert($event['start'], "UTC", $eventdata['timezone'], $mask);
                }
                if ($event['finish'] && !$event['nofinish']) {
-                       $eventdata['end'] = datetime_convert($eventdata['timezone'], "UTC", $event['finish'], $mask);
+                       $eventdata['end'] = DateTimeFormat::convert($event['finish'], "UTC", $eventdata['timezone'], $mask);
                }
                if ($event['summary']) {
                        $eventdata['summary'] = html_entity_decode(bb2diaspora($event['summary']));
@@ -3463,7 +3617,7 @@ 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;
                        $location["lng"] = 0;
@@ -3483,30 +3637,30 @@ class Diaspora
         * 'type' -> Message type ("status_message" or "reshare")
         * 'message' -> Array of XML elements of the status
         */
-       public static function build_status($item, $owner)
+       public static function buildStatus($item, $owner)
        {
-               $cachekey = "diaspora:build_status:".$item['guid'];
+               $cachekey = "diaspora:buildStatus:".$item['guid'];
 
                $result = Cache::get($cachekey);
                if (!is_null($result)) {
                        return $result;
                }
 
-               $myaddr = self::my_handle($owner);
+               $myaddr = self::myHandle($owner);
 
                $public = (($item["private"]) ? "false" : "true");
 
-               $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d\TH:i:s\Z');
+               $created = DateTimeFormat::utc($item["created"], DateTimeFormat::ATOM);
 
                // Detect a share element and do a reshare
-               if (!$item['private'] && ($ret = self::is_reshare($item["body"]))) {
-                       $message = array("author" => $myaddr,
+               if (!$item['private'] && ($ret = self::isReshare($item["body"]))) {
+                       $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];
 
                        $type = "reshare";
                } else {
@@ -3524,14 +3678,14 @@ class Diaspora
                        if ($item["attach"]) {
                                $cnt = preg_match_all('/href=\"(.*?)\"(.*?)title=\"(.*?)\"/ism', $item["attach"], $matches, PREG_SET_ORDER);
                                if (cnt) {
-                                       $body .= "\n".t("Attachments:")."\n";
+                                       $body .= "\n".L10n::t("Attachments:")."\n";
                                        foreach ($matches as $mtch) {
                                                $body .= "[".$mtch[3]."](".$mtch[1].")\n";
                                        }
                                }
                        }
 
-                       $location = array();
+                       $location = [];
 
                        if ($item["location"] != "")
                                $location["address"] = $item["location"];
@@ -3542,13 +3696,13 @@ 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"])) {
@@ -3556,7 +3710,7 @@ class Diaspora
                        }
 
                        if ($item['event-id'] > 0) {
-                               $event = self::build_event($item['event-id']);
+                               $event = self::buildEvent($item['event-id']);
                                if (count($event)) {
                                        $message['event'] = $event;
 
@@ -3568,7 +3722,7 @@ class Diaspora
                        $type = "status_message";
                }
 
-               $msg = array("type" => $type, "message" => $message);
+               $msg = ["type" => $type, "message" => $message];
 
                Cache::set($cachekey, $msg, CACHE_QUARTER_HOUR);
 
@@ -3585,11 +3739,11 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function send_status($item, $owner, $contact, $public_batch = false)
+       public static function sendStatus($item, $owner, $contact, $public_batch = false)
        {
-               $status = self::build_status($item, $owner);
+               $status = self::buildStatus($item, $owner);
 
-               return self::build_and_transmit($owner, $contact, $status["type"], $status["message"], $public_batch, $item["guid"]);
+               return self::buildAndTransmit($owner, $contact, $status["type"], $status["message"], $public_batch, $item["guid"]);
        }
 
        /**
@@ -3600,7 +3754,7 @@ class Diaspora
         *
         * @return array The data for a "like"
         */
-       private static function construct_like($item, $owner)
+       private static function constructLike($item, $owner)
        {
                $p = q(
                        "SELECT `guid`, `uri`, `parent-uri` FROM `item` WHERE `uri` = '%s' LIMIT 1",
@@ -3619,12 +3773,12 @@ class Diaspora
                        $positive = "false";
                }
 
-               return(array("author" => self::my_handle($owner),
+               return(["author" => self::myHandle($owner),
                                "guid" => $item["guid"],
                                "parent_guid" => $parent["guid"],
                                "parent_type" => $target_type,
                                "positive" => $positive,
-                               "author_signature" => ""));
+                               "author_signature" => ""]);
        }
 
        /**
@@ -3635,8 +3789,8 @@ class Diaspora
         *
         * @return array The data for an "EventParticipation"
         */
-       private static function construct_attend($item, $owner) {
-
+       private static function constructAttend($item, $owner)
+       {
                $p = q(
                        "SELECT `guid`, `uri`, `parent-uri` FROM `item` WHERE `uri` = '%s' LIMIT 1",
                        dbesc($item["thr-parent"])
@@ -3662,11 +3816,11 @@ class Diaspora
                                return false;
                }
 
-               return(array("author" => self::my_handle($owner),
+               return(["author" => self::myHandle($owner),
                                "guid" => $item["guid"],
                                "parent_guid" => $parent["guid"],
                                "status" => $attend_answer,
-                               "author_signature" => ""));
+                               "author_signature" => ""]);
        }
 
        /**
@@ -3677,9 +3831,9 @@ class Diaspora
         *
         * @return array The data for a comment
         */
-       private static function construct_comment($item, $owner)
+       private static function constructComment($item, $owner)
        {
-               $cachekey = "diaspora:construct_comment:".$item['guid'];
+               $cachekey = "diaspora:constructComment:".$item['guid'];
 
                $result = Cache::get($cachekey);
                if (!is_null($result)) {
@@ -3699,18 +3853,18 @@ class Diaspora
                $parent = $p[0];
 
                $text = html_entity_decode(bb2diaspora($item["body"]));
-               $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d\TH:i:s\Z');
+               $created = DateTimeFormat::utc($item["created"], DateTimeFormat::ATOM);
 
-               $comment = array("author" => self::my_handle($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']) {
-                       $comment['thread_parent_guid'] = self::get_guid_from_uri($item['thr-parent'], $item['uid']);
+                       $comment['thread_parent_guid'] = self::getGuidFromUri($item['thr-parent'], $item['uid']);
                }
 
                Cache::set($cachekey, $comment, CACHE_QUARTER_HOUR);
@@ -3728,16 +3882,16 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function send_followup($item, $owner, $contact, $public_batch = false)
+       public static function sendFollowup($item, $owner, $contact, $public_batch = false)
        {
-               if (in_array($item['verb'], array(ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE))) {
-                       $message = self::construct_attend($item, $owner);
+               if (in_array($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))) {
-                       $message = self::construct_like($item, $owner);
+               } elseif (in_array($item["verb"], [ACTIVITY_LIKE, ACTIVITY_DISLIKE])) {
+                       $message = self::constructLike($item, $owner);
                        $type = "like";
                } else {
-                       $message = self::construct_comment($item, $owner);
+                       $message = self::constructComment($item, $owner);
                        $type = "comment";
                }
 
@@ -3747,7 +3901,7 @@ class Diaspora
 
                $message["author_signature"] = self::signature($owner, $message);
 
-               return self::build_and_transmit($owner, $contact, $type, $message, $public_batch, $item["guid"]);
+               return self::buildAndTransmit($owner, $contact, $type, $message, $public_batch, $item["guid"]);
        }
 
        /**
@@ -3758,23 +3912,23 @@ class Diaspora
         *
         * @return string The message
         */
-       private static function message_from_signature($item, $signature)
+       private static function messageFromSignature($item, $signature)
        {
                // Split the signed text
                $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);
@@ -3788,12 +3942,12 @@ 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 $message;
        }
@@ -3808,11 +3962,11 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function send_relay($item, $owner, $contact, $public_batch = false)
+       public static function sendRelay($item, $owner, $contact, $public_batch = false)
        {
                if ($item["deleted"]) {
-                       return self::send_retraction($item, $owner, $contact, $public_batch, true);
-               } elseif (in_array($item["verb"], array(ACTIVITY_LIKE, ACTIVITY_DISLIKE))) {
+                       return self::sendRetraction($item, $owner, $contact, $public_batch, true);
+               } elseif (in_array($item["verb"], [ACTIVITY_LIKE, ACTIVITY_DISLIKE])) {
                        $type = "like";
                } else {
                        $type = "comment";
@@ -3837,13 +3991,13 @@ class Diaspora
                // Old way - is used by the internal Friendica functions
                /// @todo Change all signatur storing functions to the new format
                if ($signature['signed_text'] && $signature['signature'] && $signature['signer']) {
-                       $message = self::message_from_signature($item, $signature);
+                       $message = self::messageFromSignature($item, $signature);
                } else {// New way
                        $msg = json_decode($signature['signed_text'], true);
 
-                       $message = array();
+                       $message = [];
                        if (is_array($msg)) {
-                               foreach ($msg AS $field => $data) {
+                               foreach ($msg as $field => $data) {
                                        if (!$item["deleted"]) {
                                                if ($field == "diaspora_handle") {
                                                        $field = "author";
@@ -3864,7 +4018,7 @@ class Diaspora
 
                logger("Relayed data ".print_r($message, true), LOGGER_DEBUG);
 
-               return self::build_and_transmit($owner, $contact, $type, $message, $public_batch, $item["guid"]);
+               return self::buildAndTransmit($owner, $contact, $type, $message, $public_batch, $item["guid"]);
        }
 
        /**
@@ -3878,27 +4032,27 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function send_retraction($item, $owner, $contact, $public_batch = false, $relay = false)
+       public static function sendRetraction($item, $owner, $contact, $public_batch = false, $relay = false)
        {
-               $itemaddr = self::handle_from_contact($item["contact-id"], $item["gcontact-id"]);
+               $itemaddr = self::handleFromContact($item["contact-id"], $item["gcontact-id"]);
 
                $msg_type = "retraction";
 
                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);
 
-               return self::build_and_transmit($owner, $contact, $msg_type, $message, $public_batch, $item["guid"]);
+               return self::buildAndTransmit($owner, $contact, $msg_type, $message, $public_batch, $item["guid"]);
        }
 
        /**
@@ -3910,9 +4064,9 @@ class Diaspora
         *
         * @return int The result of the transmission
         */
-       public static function send_mail($item, $owner, $contact)
+       public static function sendMail($item, $owner, $contact)
        {
-               $myaddr = self::my_handle($owner);
+               $myaddr = self::myHandle($owner);
 
                $r = q(
                        "SELECT * FROM `conv` WHERE `id` = %d AND `uid` = %d LIMIT 1",
@@ -3926,41 +4080,97 @@ class Diaspora
                }
                $cnv = $r[0];
 
-               $conv = array(
+               $conv = [
                        "author" => $cnv["creator"],
                        "guid" => $cnv["guid"],
                        "subject" => $cnv["subject"],
-                       "created_at" => datetime_convert("UTC", "UTC", $cnv['created'], 'Y-m-d\TH:i:s\Z'),
+                       "created_at" => DateTimeFormat::utc($cnv['created'], DateTimeFormat::ATOM),
                        "participants" => $cnv["recips"]
-               );
+               ];
 
                $body = bb2diaspora($item["body"]);
-               $created = datetime_convert("UTC", "UTC", $item["created"], 'Y-m-d\TH:i:s\Z');
+               $created = DateTimeFormat::utc($item["created"], DateTimeFormat::ATOM);
 
-               $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", $cnv['created'], 'Y-m-d\TH:i:s\Z'),
+                                       "created_at" => DateTimeFormat::utc($cnv['created'], DateTimeFormat::ATOM),
                                        "participants" => $cnv["recips"],
-                                       "message" => $msg);
+                                       "message" => $msg];
 
                        $type = "conversation";
                }
 
-               return self::build_and_transmit($owner, $contact, $type, $message, false, $item["guid"]);
+               return self::buildAndTransmit($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];
        }
 
        /**
@@ -3982,25 +4192,30 @@ 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';
                $searchable = (($profile['publish'] && $profile['net-publish']) ? 'true' : 'false');
 
                if ($searchable === 'true') {
-                       $dob = '1000-00-00';
+                       $dob = '';
 
-                       if (($profile['dob']) && ($profile['dob'] > '0001-01-01')) {
-                               $dob = ((intval($profile['dob'])) ? intval($profile['dob']) : '1000') .'-'. datetime_convert('UTC', 'UTC', $profile['dob'],'m-d');
+                       if ($profile['dob'] && ($profile['dob'] > '0000-00-00')) {
+                               list($year, $month, $day) = sscanf($profile['dob'], '%4d-%2d-%2d');
+                               if ($year < 1004) {
+                                       $year = 1004;
+                               }
+                               $dob = DateTimeFormat::utc($year . '-' . $month . '-'. $day, 'Y-m-d');
                        }
 
                        $about = $profile['about'];
@@ -4023,7 +4238,7 @@ class Diaspora
                        $tags = trim($tags);
                }
 
-               return array("author" => $handle,
+               return ["author" => $handle,
                                "first_name" => $first,
                                "last_name" => $last,
                                "image_url" => $large,
@@ -4035,20 +4250,27 @@ class Diaspora
                                "location" => $location,
                                "searchable" => $searchable,
                                "nsfw" => "false",
-                               "tag_string" => $tags);
+                               "tag_string" => $tags];
        }
 
        /**
         * @brief Sends profile data
         *
-        * @param int $uid The user id
+        * @param int  $uid    The user id
+        * @param bool $recips optional, default false
+        * @return void
         */
-       public static function send_profile($uid, $recips = false)
+       public static function sendProfile($uid, $recips = false)
        {
                if (!$uid) {
                        return;
                }
 
+               $owner = User::getOwnerDataById($uid);
+               if (!$owner) {
+                       return;
+               }
+
                if (!$recips) {
                        $recips = q(
                                "SELECT `id`,`name`,`network`,`pubkey`,`notify` FROM `contact` WHERE `network` = '%s'
@@ -4067,7 +4289,7 @@ class Diaspora
 
                foreach ($recips as $recip) {
                        logger("Send updated profile data for user ".$uid." to contact ".$recip["id"], LOGGER_DEBUG);
-                       self::build_and_transmit($profile, $recip, "profile", $message, false, "", true);
+                       self::buildAndTransmit($owner, $recip, "profile", $message, false, "", false);
                }
        }
 
@@ -4079,7 +4301,7 @@ class Diaspora
         *
         * @return bool Success
         */
-       public static function store_like_signature($contact, $post_id)
+       public static function storeLikeSignature($contact, $post_id)
        {
                // Is the contact the owner? Then fetch the private key
                if (!$contact['self'] || ($contact['uid'] == 0)) {
@@ -4099,18 +4321,22 @@ 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;
                }
 
-               $message = self::construct_like($r[0], $contact);
                $message["author_signature"] = self::signature($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;
@@ -4126,7 +4352,7 @@ class Diaspora
         *
         * @return bool Success
         */
-       public static function store_comment_signature($item, $contact, $uprvkey, $message_id)
+       public static function storeCommentSignature($item, $contact, $uprvkey, $message_id)
        {
                if ($uprvkey == "") {
                        logger('No private key, so not storing comment signature', LOGGER_DEBUG);
@@ -4135,14 +4361,18 @@ class Diaspora
 
                $contact["uprvkey"] = $uprvkey;
 
-               $message = self::construct_comment($item, $contact);
+               $message = self::constructComment($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;