]> git.mxchange.org Git - friendica.git/blobdiff - src/Protocol/ActivityPub/Receiver.php
Merge pull request #13269 from MrPetovan/bug/fix-exception-return-code
[friendica.git] / src / Protocol / ActivityPub / Receiver.php
index 784d0259d4d7c11317ee6bd62b94db2f6cf32b8e..7a07e1a7f2ab52f4e6739d06201c68ee8408ae47 100644 (file)
@@ -73,12 +73,13 @@ class Receiver
        const TARGET_FOLLOWER = 5;
        const TARGET_ANSWER = 6;
        const TARGET_GLOBAL = 7;
+       const TARGET_AUDIENCE = 8;
 
-       const COMPLETION_NONE    = 0;
-       const COMPLETION_ANNOUCE = 1;
-       const COMPLETION_RELAY   = 2;
-       const COMPLETION_MANUAL  = 3;
-       const COMPLETION_AUTO    = 4;
+       const COMPLETION_NONE     = 0;
+       const COMPLETION_ANNOUNCE = 1;
+       const COMPLETION_RELAY    = 2;
+       const COMPLETION_MANUAL   = 3;
+       const COMPLETION_AUTO     = 4;
 
        /**
         * Checks incoming message from the inbox
@@ -248,14 +249,14 @@ class Receiver
         * Fetches the object type for a given object id
         *
         * @param array   $activity
-        * @param string  $object_id Object ID of the the provided object
+        * @param string  $object_id Object ID of the provided object
         * @param integer $uid       User ID
         *
         * @return string with object type or NULL
         * @throws \Friendica\Network\HTTPException\InternalServerErrorException
         * @throws \ImagickException
         */
-       private static function fetchObjectType(array $activity, string $object_id, int $uid = 0)
+       public static function fetchObjectType(array $activity, string $object_id, int $uid = 0)
        {
                if (!empty($activity['as:object'])) {
                        $object_type = JsonLD::fetchElement($activity['as:object'], '@type');
@@ -290,16 +291,17 @@ class Receiver
        /**
         * Prepare the object array
         *
-        * @param array   $activity     Array with activity data
-        * @param integer $uid          User ID
-        * @param boolean $push         Message had been pushed to our system
-        * @param boolean $trust_source Do we trust the source?
+        * @param array   $activity       Array with activity data
+        * @param integer $uid            User ID
+        * @param boolean $push           Message had been pushed to our system
+        * @param boolean $trust_source   Do we trust the source?
+        * @param string  $original_actor Actor of the original activity. Used for receiver detection. (Optional)
         *
         * @return array with object data
         * @throws \Friendica\Network\HTTPException\InternalServerErrorException
         * @throws \ImagickException
         */
-       public static function prepareObjectData(array $activity, int $uid, bool $push, bool &$trust_source): array
+       public static function prepareObjectData(array $activity, int $uid, bool $push, bool &$trust_source, string $original_actor = ''): array
        {
                $id        = JsonLD::fetchElement($activity, '@id');
                $type      = JsonLD::fetchElement($activity, '@type');
@@ -318,7 +320,7 @@ class Receiver
                $fetched = false;
 
                if (!empty($id) && !$trust_source) {
-                       $fetch_uid = $uid ?: self::getBestUserForActivity($activity);
+                       $fetch_uid = $uid ?: self::getBestUserForActivity($activity, $original_actor);
 
                        $fetched_activity = Processor::fetchCachedActivity($fetch_id, $fetch_uid);
                        if (!empty($fetched_activity)) {
@@ -354,7 +356,7 @@ class Receiver
                $type = JsonLD::fetchElement($activity, '@type');
 
                // Fetch all receivers from to, cc, bto and bcc
-               $receiverdata = self::getReceivers($activity, $actor, [], false, $push || $fetched);
+               $receiverdata = self::getReceivers($activity, $original_actor ?: $actor, [], false, $push || $fetched);
                $receivers = $reception_types = [];
                foreach ($receiverdata as $key => $data) {
                        $receivers[$key] = $data['uid'];
@@ -378,7 +380,7 @@ class Receiver
 
                // We possibly need some user to fetch private content,
                // so we fetch one out of the receivers if no uid is provided.
-               $fetch_uid = $uid ?: self::getBestUserForActivity($activity);
+               $fetch_uid = $uid ?: self::getBestUserForActivity($activity, $original_actor);
 
                $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
                if (empty($object_id)) {
@@ -393,21 +395,6 @@ class Receiver
 
                $object_type = self::fetchObjectType($activity, $object_id, $fetch_uid);
 
-               // Fetch the activity on Lemmy "Announce" messages (announces of activities)
-               if (($type == 'as:Announce') && in_array($object_type, array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
-                       Logger::debug('Fetch announced activity', ['object' => $object_id]);
-                       $data = Processor::fetchCachedActivity($object_id, $fetch_uid);
-                       if (!empty($data)) {
-                               $type = $object_type;
-                               $activity = JsonLD::compact($data);
-
-                               // Some variables need to be refetched since the activity changed
-                               $actor = JsonLD::fetchElement($activity, 'as:actor', '@id');
-                               $object_id = JsonLD::fetchElement($activity, 'as:object', '@id');
-                               $object_type = self::fetchObjectType($activity, $object_id, $fetch_uid);
-                       }
-               }
-
                // Any activities on account types must not be altered
                if (in_array($type, ['as:Flag'])) {
                        $object_data = [];
@@ -446,7 +433,7 @@ class Receiver
                } elseif (in_array($type, array_merge(self::ACTIVITY_TYPES, ['as:Announce', 'as:Follow'])) && in_array($object_type, self::CONTENT_TYPES)) {
                        // Create a mostly empty array out of the activity data (instead of the object).
                        // This way we later don't have to check for the existence of each individual array element.
-                       $object_data = self::processObject($activity, false);
+                       $object_data = self::processObject($activity, $original_actor);
                        $object_data['name'] = $type;
                        $object_data['author'] = JsonLD::fetchElement($activity, 'as:actor', '@id');
                        $object_data['object_id'] = $object_id;
@@ -487,7 +474,7 @@ class Receiver
                        $object_data['object_type'] = $object_type;
                }
 
-               foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
+               foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc', 'as:audience', 'as:attributedTo'] as $element) {
                        if ((empty($object_data['receiver_urls'][$element]) || in_array($element, ['as:bto', 'as:bcc'])) && !empty($urls[$element])) {
                                $object_data['receiver_urls'][$element] = array_unique(array_merge($object_data['receiver_urls'][$element] ?? [], $urls[$element]));
                        }
@@ -559,7 +546,7 @@ class Receiver
                        return true;
                }
 
-               if ($type == 'as:View') {
+               if (!DI::config()->get('system', 'process_view') && ($type == 'as:View')) {
                        Logger::info('View activities are ignored.', ['signer' => $signer, 'http_signer' => $http_signer]);
                        return true;
                }
@@ -590,20 +577,34 @@ class Receiver
                        }
                }
 
+               // Lemmy announces activities.
+               // To simplify the further processing, we modify the received object.
+               // For announced "create" activities we remove the middle layer.
+               // For the rest (like, dislike, update, ...) we just process the activity directly.
+               $original_actor = '';
+               $object_type = JsonLD::fetchElement($activity['as:object'] ?? [], '@type');
+               if (($type == 'as:Announce') && !empty($object_type) && !in_array($object_type, self::CONTENT_TYPES) && self::isGroup($actor)) {
+                       $object_object_type = JsonLD::fetchElement($activity['as:object']['as:object'] ?? [], '@type');
+                       if (in_array($object_type, ['as:Create']) && in_array($object_object_type, self::CONTENT_TYPES)) {
+                               Logger::debug('Replace "create" activity with inner object', ['type' => $object_type, 'object_type' => $object_object_type]);
+                               $activity['as:object'] = $activity['as:object']['as:object'];
+                       } elseif (in_array($object_type, array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
+                               Logger::debug('Change announced activity to activity', ['type' => $object_type]);
+                               $original_actor = $actor;
+                               $type = $object_type;
+                               $activity = $activity['as:object'];
+                       } else {
+                               Logger::info('Unhandled announced activity', ['type' => $object_type, 'object_type' => $object_object_type]);
+                       }
+               }
+
                // $trust_source is called by reference and is set to true if the content was retrieved successfully
-               $object_data = self::prepareObjectData($activity, $uid, $push, $trust_source);
+               $object_data = self::prepareObjectData($activity, $uid, $push, $trust_source, $original_actor);
                if (empty($object_data)) {
-                       Logger::info('No object data found', ['activity' => $activity]);
+                       Logger::info('No object data found', ['activity' => $activity, 'callstack' => System::callstack(20)]);
                        return true;
                }
 
-               // Lemmy is announcing activities.
-               // We are changing the announces into regular activities.
-               if (($type == 'as:Announce') && in_array($object_data['type'] ?? '', array_merge(self::ACTIVITY_TYPES, ['as:Delete', 'as:Undo', 'as:Update']))) {
-                       Logger::debug('Change type of announce to activity', ['type' => $object_data['type']]);
-                       $type = $object_data['type'];
-               }
-
                if (!empty($body) && empty($object_data['raw'])) {
                        $object_data['raw'] = $body;
                }
@@ -630,7 +631,7 @@ class Receiver
                        $object_data['object_activity'] = $activity;
                }
 
-               if (($type == 'as:Create') && $trust_source) {
+               if (($type == 'as:Create') && $trust_source && !in_array($completion, [self::COMPLETION_MANUAL, self::COMPLETION_ANNOUNCE])) {
                        if (self::hasArrived($object_data['object_id'])) {
                                Logger::info('The activity already arrived.', ['id' => $object_data['object_id']]);
                                return true;
@@ -641,9 +642,11 @@ class Receiver
                                Logger::info('The activity is already added.', ['id' => $object_data['object_id']]);
                                return true;
                        }
+               } elseif (($type == 'as:Create') && $trust_source && !self::hasArrived($object_data['object_id'])) {
+                       self::addArrivedId($object_data['object_id']);
                }
 
-               $decouple = DI::config()->get('system', 'decoupled_receiver') && !in_array($completion, [self::COMPLETION_MANUAL, self::COMPLETION_ANNOUCE]);
+               $decouple = DI::config()->get('system', 'decoupled_receiver') && !in_array($completion, [self::COMPLETION_MANUAL, self::COMPLETION_ANNOUNCE]);
 
                if ($decouple && ($trust_source || DI::config()->get('debug', 'ap_inbox_store_untrusted'))) {
                        $object_data = Queue::add($object_data, $type, $uid, $http_signer, $push, $trust_source);
@@ -678,6 +681,18 @@ class Receiver
                return true;
        }
 
+       /**
+        * Checks if the provided actor is a group account
+        *
+        * @param string $actor
+        * @return boolean
+        */
+       private static function isGroup(string $actor): bool
+       {
+               $profile = APContact::getByURL($actor);
+               return ($profile['type'] ?? '') == 'Group';
+       }
+
        /**
         * Route activities
         *
@@ -731,7 +746,7 @@ class Receiver
                        case 'as:Announce':
                                if (in_array($object_data['object_type'], self::CONTENT_TYPES)) {
                                        if (!Item::searchByLink($object_data['object_id'], $uid)) {
-                                               if (ActivityPub\Processor::fetchMissingActivity($object_data['object_id'], [], $object_data['actor'], self::COMPLETION_ANNOUCE, $uid)) {
+                                               if (ActivityPub\Processor::fetchMissingActivity($object_data['object_id'], [], $object_data['actor'], self::COMPLETION_ANNOUNCE, $uid)) {
                                                        Logger::debug('Created announced id', ['uid' => $uid, 'id' => $object_data['object_id']]);
                                                        Queue::remove($object_data);
                                                } else {
@@ -999,10 +1014,10 @@ class Receiver
         *
         * @return int   user id
         */
-       public static function getBestUserForActivity(array $activity): int
+       public static function getBestUserForActivity(array $activity, string $actor = ''): int
        {
                $uid = 0;
-               $actor = JsonLD::fetchElement($activity, 'as:actor', '@id') ?? '';
+               $actor = $actor ?: JsonLD::fetchElement($activity, 'as:actor', '@id') ?? '';
 
                $receivers = self::getReceivers($activity, $actor, [], false, false);
                foreach ($receivers as $receiver) {
@@ -1030,7 +1045,7 @@ class Receiver
        {
                $urls = [];
 
-               foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
+               foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc', 'as:audience', 'as:attributedTo'] as $element) {
                        $receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
                        if (empty($receiver_list)) {
                                continue;
@@ -1067,7 +1082,7 @@ class Receiver
        {
                $reply = $receivers = $profile = [];
 
-               // When it is an answer, we inherite the receivers from the parent
+               // When it is an answer, we inherit the receivers from the parent
                $replyto = JsonLD::fetchElement($activity, 'as:inReplyTo', '@id');
                if (!empty($replyto)) {
                        $reply = [$replyto];
@@ -1085,18 +1100,10 @@ class Receiver
                        $reply[] = $object_id;
                }
 
-               if (!empty($reply)) {
-                       $parents = Post::select(['uid'], DBA::mergeConditions(['uri' => $reply], ["`uid` != ?", 0]));
-                       while ($parent = Post::fetch($parents)) {
-                               $receivers[$parent['uid']] = ['uid' => $parent['uid'], 'type' => self::TARGET_ANSWER];
-                       }
-                       DBA::close($parents);
-               }
-
                if (!empty($actor)) {
                        $profile   = APContact::getByURL($actor);
                        $followers = $profile['followers'] ?? '';
-                       $is_forum  = ($actor['type'] ?? '') == 'Group';
+                       $isGroup  = ($profile['type'] ?? '') == 'Group';
                        if ($push) {
                                Contact::updateByUrlIfNeeded($actor);
                        }
@@ -1104,13 +1111,13 @@ class Receiver
                } else {
                        Logger::info('Empty actor', ['activity' => $activity]);
                        $followers = '';
-                       $is_forum  = false;
+                       $isGroup  = false;
                }
 
                // We have to prevent false follower assumptions upon thread completions
                $follower_target = empty($activity['thread-completion']) ? self::TARGET_FOLLOWER : self::TARGET_UNKNOWN;
 
-               foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
+               foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc','as:audience'] as $element) {
                        $receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
                        if (empty($receiver_list)) {
                                continue;
@@ -1127,7 +1134,7 @@ class Receiver
                                }
 
                                // Fetch the receivers for the public and the followers collection
-                               if ((($receiver == $followers) || (($receiver == self::PUBLIC_COLLECTION) && !$is_forum)) && !empty($actor)) {
+                               if ((($receiver == $followers) || (($receiver == self::PUBLIC_COLLECTION) && !$isGroup) || ($isGroup && ($element == 'as:audience'))) && !empty($actor)) {
                                        $receivers = self::getReceiverForActor($actor, $tags, $receivers, $follower_target, $profile);
                                        continue;
                                }
@@ -1146,7 +1153,7 @@ class Receiver
                                        $condition = ['nurl' => Strings::normaliseLink($actor), 'rel' => [Contact::SHARING, Contact::FRIEND],
                                                'network' => $networks, 'archive' => false, 'pending' => false, 'uid' => $contact['uid']];
 
-                                       // Forum posts are only accepted from forum contacts
+                                       // Group posts are only accepted from group contacts
                                        if ($contact['contact-type'] == Contact::TYPE_COMMUNITY) {
                                                $condition['rel'] = [Contact::SHARING, Contact::FRIEND, Contact::FOLLOWER];
                                        }
@@ -1171,6 +1178,9 @@ class Receiver
                                                case 'as:bcc':
                                                        $type = self::TARGET_BCC;
                                                        break;
+                                               case 'as:audience':
+                                                       $type = self::TARGET_AUDIENCE;
+                                                       break;
                                        }
 
                                        $receivers[$contact['uid']] = ['uid' => $contact['uid'], 'type' => $type];
@@ -1178,17 +1188,29 @@ class Receiver
                        }
                }
 
+               if (!empty($reply) && (!empty($receivers[0]) || !empty($receivers[-1]))) {
+                       $parents = Post::select(['uid'], DBA::mergeConditions(['uri' => $reply], ["`uid` != ?", 0]));
+                       while ($parent = Post::fetch($parents)) {
+                               $receivers[$parent['uid']] = ['uid' => $parent['uid'], 'type' => self::TARGET_ANSWER];
+                       }
+                       DBA::close($parents);
+               }
+
                self::switchContacts($receivers, $actor);
 
                // "birdsitelive" is a service that mirrors tweets into the fediverse
-               // These posts can be fetched without authentification, but are not marked as public
+               // These posts can be fetched without authentication, but are not marked as public
                // We treat them as unlisted posts to be able to handle them.
+               // We always process deletion activities.
+               $activity_type = JsonLD::fetchElement($activity, '@type');
                if (empty($receivers) && $fetch_unlisted && Contact::isPlatform($actor, 'birdsitelive')) {
                        $receivers[0]  = ['uid' => 0, 'type' => self::TARGET_GLOBAL];
                        $receivers[-1] = ['uid' => -1, 'type' => self::TARGET_GLOBAL];
                        Logger::notice('Post from "birdsitelive" is set to "unlisted"', ['id' => JsonLD::fetchElement($activity, '@id')]);
+               } elseif (empty($receivers) && in_array($activity_type, ['as:Delete', 'as:Undo'])) {
+                       $receivers[0] = ['uid' => 0, 'type' => self::TARGET_GLOBAL];
                } elseif (empty($receivers)) {
-                       Logger::notice('Post has got no receivers', ['fetch_unlisted' => $fetch_unlisted, 'actor' => $actor, 'id' => JsonLD::fetchElement($activity, '@id'), 'type' => JsonLD::fetchElement($activity, '@type')]);
+                       Logger::notice('Post has got no receivers', ['fetch_unlisted' => $fetch_unlisted, 'actor' => $actor, 'id' => JsonLD::fetchElement($activity, '@id'), 'type' => $activity_type, 'callstack' => System::callstack(20)]);
                }
 
                return $receivers;
@@ -1370,9 +1392,9 @@ class Receiver
        }
 
        /**
-        * Fetches the object data from external ressources if needed
+        * Fetches the object data from external resources if needed
         *
-        * @param string  $object_id    Object ID of the the provided object
+        * @param string  $object_id    Object ID of the provided object
         * @param array   $object       The provided object array
         * @param boolean $trust_source Do we trust the provided object?
         * @param integer $uid          User ID for the signature that we use to fetch data
@@ -1424,21 +1446,9 @@ class Receiver
                        return false;
                }
 
-               // Lemmy is resharing "create" activities instead of content
-               // We fetch the content from the activity.
-               if (in_array($type, ['as:Create'])) {
-                       $object = $object['as:object'];
-                       $type = JsonLD::fetchElement($object, '@type');
-                       if (empty($type)) {
-                               Logger::info('Empty type');
-                               return false;
-                       }
-                       $object_data = self::processObject($object, false);
-               }
-
                // We currently don't handle 'pt:CacheFile', but with this step we avoid logging
                if (in_array($type, self::CONTENT_TYPES) || ($type == 'pt:CacheFile')) {
-                       $object_data = self::processObject($object, false);
+                       $object_data = self::processObject($object, '');
 
                        if (!empty($data)) {
                                $object_data['raw-object'] = json_encode($data);
@@ -1636,7 +1646,7 @@ class Receiver
                                                'type' => str_replace('as:', '', JsonLD::fetchElement($attachment, '@type')),
                                                'mediaType' => JsonLD::fetchElement($attachment, 'as:mediaType', '@value'),
                                                'name' => JsonLD::fetchElement($attachment, 'as:name', '@value'),
-                                               'url' => JsonLD::fetchElement($attachment, 'as:url', '@id'),
+                                               'url' => JsonLD::fetchElement($attachment, 'as:url', '@id') ?? JsonLD::fetchElement($attachment, 'as:href', '@id'),
                                                'height' => JsonLD::fetchElement($attachment, 'as:height', '@value'),
                                                'width' => JsonLD::fetchElement($attachment, 'as:width', '@value'),
                                                'image' => JsonLD::fetchElement($attachment, 'as:image', '@id')
@@ -1842,17 +1852,47 @@ class Receiver
        /**
         * Fetches data from the object part of an activity
         *
-        * @param array $object
+        * @param array  $object
+        * @param string $actor
         *
         * @return array|bool Object data or FALSE if $object does not contain @id element
         * @throws \Exception
         */
-       private static function processObject(array $object, bool $c2s)
+       private static function processObject(array $object, string $actor)
        {
-               if (!$c2s && !JsonLD::fetchElement($object, '@id')) {
+               if (!JsonLD::fetchElement($object, '@id')) {
                        return false;
                }
 
+               $object_data = self::getObjectDataFromActivity($object);
+
+               $receiverdata = self::getReceivers($object, $actor ?: $object_data['actor'] ?? '', $object_data['tags'], true, false);
+               $receivers = $reception_types = [];
+               foreach ($receiverdata as $key => $data) {
+                       $receivers[$key] = $data['uid'];
+                       $reception_types[$data['uid']] = $data['type'] ?? 0;
+               }
+
+               $object_data['receiver_urls']  = self::getReceiverURL($object);
+               $object_data['receiver']       = $receivers;
+               $object_data['reception_type'] = $reception_types;
+
+               $object_data['unlisted'] = in_array(-1, $object_data['receiver']);
+               unset($object_data['receiver'][-1]);
+               unset($object_data['reception_type'][-1]);
+
+               return $object_data;
+       }
+
+       /**
+        * Create an object data array from a given activity
+        *
+        * @param array $object
+        *
+        * @return array Object data
+        */
+       public static function getObjectDataFromActivity(array $object): array
+       {
                $object_data = [];
                $object_data['object_type'] = JsonLD::fetchElement($object, '@type');
                $object_data['id'] = JsonLD::fetchElement($object, '@id');
@@ -1981,25 +2021,6 @@ class Receiver
                        $object_data['question'] = self::processQuestion($object);
                }
 
-               if ($c2s) {
-                       $object_data['target']   = self::getTargets($object, $object_data['actor'] ?? '');
-                       $object_data['receiver'] = [];
-               } else {
-                       $receiverdata = self::getReceivers($object, $object_data['actor'] ?? '', $object_data['tags'], true, false);
-                       $receivers = $reception_types = [];
-                       foreach ($receiverdata as $key => $data) {
-                               $receivers[$key] = $data['uid'];
-                               $reception_types[$data['uid']] = $data['type'] ?? 0;
-                       }
-
-                       $object_data['receiver_urls']  = self::getReceiverURL($object);
-                       $object_data['receiver']       = $receivers;
-                       $object_data['reception_type'] = $reception_types;
-
-                       $object_data['unlisted'] = in_array(-1, $object_data['receiver']);
-                       unset($object_data['receiver'][-1]);
-                       unset($object_data['reception_type'][-1]);
-               }
                return $object_data;
        }
 
@@ -2027,137 +2048,4 @@ class Receiver
        {
                return DBA::exists('arrived-activity', ['object-id' => $id]);
        }
-
-       public static function processC2SActivity(array $activity, int $uid, array $application)
-       {
-               $ldactivity = JsonLD::compact($activity);
-               if (empty($ldactivity)) {
-                       Logger::notice('Invalid activity', ['activity' => $activity, 'uid' => $uid]);
-                       return;
-               }
-
-               $type = JsonLD::fetchElement($ldactivity, '@type');
-               if (!$type) {
-                       Logger::notice('Empty type', ['activity' => $ldactivity, 'uid' => $uid]);
-                       return;
-               }
-
-               $object_id   = JsonLD::fetchElement($ldactivity, 'as:object', '@id') ?? '';
-               $object_type = self::fetchObjectType($ldactivity, $object_id, $uid);
-               if (!$object_type && !$object_id) {
-                       Logger::notice('Empty object type or id', ['activity' => $ldactivity, 'uid' => $uid]);
-                       return;
-               }
-
-               Logger::debug('Processing activity', ['type' => $type, 'object_type' => $object_type, 'object_id' => $object_id, 'activity' => $ldactivity]);
-               self::routeC2SActivities($type, $object_type, $object_id, $uid, $application, $ldactivity);
-               throw new \Friendica\Network\HTTPException\AcceptedException();
-       }
-
-       private static function getTargets(array $object, string $actor): array
-       {
-               $profile   = APContact::getByURL($actor);
-               $followers = $profile['followers'];
-
-               $targets = [];
-
-               foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
-                       switch ($element) {
-                               case 'as:to':
-                                       $type = self::TARGET_TO;
-                                       break;
-                               case 'as:cc':
-                                       $type = self::TARGET_CC;
-                                       break;
-                               case 'as:bto':
-                                       $type = self::TARGET_BTO;
-                                       break;
-                               case 'as:bcc':
-                                       $type = self::TARGET_BCC;
-                                       break;
-                       }
-                       $receiver_list = JsonLD::fetchElementArray($object, $element, '@id');
-                       if (empty($receiver_list)) {
-                               continue;
-                       }
-
-                       foreach ($receiver_list as $receiver) {
-                               if ($receiver == self::PUBLIC_COLLECTION) {
-                                       $targets[self::TARGET_GLOBAL] = ($element == 'as:to');
-                                       continue;
-                               }
-
-                               if ($receiver == $followers) {
-                                       $targets[self::TARGET_FOLLOWER] = true;
-                                       continue;
-                               }
-                               $targets[$type][] = Contact::getIdForURL($receiver);
-                       }
-               }
-               return $targets;
-       }
-
-       private static function routeC2SActivities(string $type, string $object_type, string $object_id, int $uid, array $application, array $ldactivity)
-       {
-               switch ($type) {
-                       case 'as:Create':
-                               if (in_array($object_type, self::CONTENT_TYPES)) {
-                                       self::createContent($uid, $application, $ldactivity);
-                               }
-                               break;
-                       case 'as:Update':
-                               if (in_array($object_type, self::CONTENT_TYPES) && !empty($object_id)) {
-                                       self::updateContent($uid, $object_id, $application, $ldactivity);
-                               }
-                               break;
-                       case 'as:Follow':
-                               if (in_array($object_type, self::ACCOUNT_TYPES) && !empty($object_id)) {
-                                       self::followAccount($uid, $object_id, $ldactivity);
-                               }
-                               break;
-               }
-       }
-
-       private static function createContent(int $uid, array $application, array $ldactivity)
-       {
-               $object_data = self::processObject($ldactivity['as:object'], true);
-               $item = Processor::processC2SContent($object_data, $application, $uid);
-               Logger::debug('Got data', ['item' => $item, 'object' => $object_data]);
-
-               $id = Item::insert($item, true);
-               if (!empty($id)) {
-                       $item = Post::selectFirst(['uri-id'], ['id' => $id]);
-                       if (!empty($item['uri-id'])) {
-                               System::jsonExit(Transmitter::createActivityFromItem($id));
-                       }
-               }
-       }
-
-       private static function updateContent(int $uid, string $object_id, array $application, array $ldactivity)
-       {
-               $id = Item::fetchByLink($object_id, $uid);
-               $original_post = Post::selectFirst(['uri-id'], ['uid' => $uid, 'origin' => true, 'id' => $id]);
-               if (empty($original_post)) {
-                       Logger::debug('Item not found or does not belong to the user', ['id' => $id, 'uid' => $uid, 'object_id' => $object_id, 'activity' => $ldactivity]);
-                       return;
-               }
-
-               $object_data = self::processObject($ldactivity['as:object'], true);
-               $item = Processor::processC2SContent($object_data, $application, $uid);
-               if (empty($item['title']) && empty($item['body'])) {
-                       Logger::debug('Empty body and title', ['id' => $id, 'uid' => $uid, 'object_id' => $object_id, 'activity' => $ldactivity]);
-                       return;
-               }
-               $post = ['title' => $item['title'], 'body' => $item['body']];
-               Logger::debug('Got data', ['id' => $id, 'uid' => $uid, 'item' => $post]);
-               Item::update($post, ['id' => $id]);
-               Item::updateDisplayCache($original_post['uri-id']);
-
-               System::jsonExit(Transmitter::createActivityFromItem($id));
-       }
-
-       private static function followAccount($uid, $object_id, $ldactivity)
-       {
-
-       }
 }