]> git.mxchange.org Git - friendica.git/blobdiff - src/Model/Item.php
Issue 11875: Fetch post on activity
[friendica.git] / src / Model / Item.php
index 8566643ed2eb8a4127a681b5428e51dd1fb07e6c..d9bd72d7c783d981de2d8338e5773494d698911b 100644 (file)
@@ -27,13 +27,11 @@ use Friendica\Core\Hook;
 use Friendica\Core\Logger;
 use Friendica\Core\Protocol;
 use Friendica\Core\Renderer;
-use Friendica\Core\Session;
 use Friendica\Core\System;
 use Friendica\Model\Tag;
 use Friendica\Core\Worker;
 use Friendica\Database\DBA;
 use Friendica\DI;
-use Friendica\Model\Post;
 use Friendica\Protocol\Activity;
 use Friendica\Protocol\ActivityPub;
 use Friendica\Protocol\Diaspora;
@@ -94,7 +92,7 @@ class Item
                'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
                'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
                'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
-               'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
+               'quote-uri', 'quote-uri-id', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
                'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network', 'author-updated', 'author-gsid', 'author-addr', 'author-uri-id',
                'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type', 'owner-updated',
                'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
@@ -114,9 +112,9 @@ class Item
                        'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
                        'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
                        'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
-                       'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
+                       'author-id', 'author-addr', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
                        'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
-                       'thr-parent-id', 'parent-uri-id', 'postopts', 'pubmail',
+                       'thr-parent-id', 'parent-uri-id', 'quote-uri', 'quote-uri-id', 'postopts', 'pubmail',
                        'event-created', 'event-edited', 'event-start', 'event-finish',
                        'event-summary', 'event-desc', 'event-location', 'event-type',
                        'event-nofinish', 'event-ignore', 'event-id'];
@@ -124,7 +122,7 @@ class Item
        // All fields in the item table
        const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
                        'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'conversation', 'vid',
-                       'contact-id', 'wall', 'gravity', 'extid', 'psid',
+                       'quote-uri', 'quote-uri-id', 'contact-id', 'wall', 'gravity', 'extid', 'psid',
                        'created', 'edited', 'commented', 'received', 'changed', 'verb',
                        'postopts', 'plink', 'resource-id', 'event-id', 'inform',
                        'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
@@ -143,10 +141,17 @@ class Item
                Activity::FOLLOW,
                Activity::ANNOUNCE];
 
+       // Privacy levels
        const PUBLIC = 0;
        const PRIVATE = 1;
        const UNLISTED = 2;
 
+       // Item weight for query ordering
+       const GRAVITY_PARENT   = 0;
+       const GRAVITY_ACTIVITY = 3;
+       const GRAVITY_COMMENT  = 6;
+       const GRAVITY_UNKNOWN  = 9;
+
        /**
         * Update existing item entries
         *
@@ -192,12 +197,20 @@ class Item
 
                Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 
-               $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network'], $condition);
+               $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network', 'quote-uri-id'], $condition);
 
                $notify_items = [];
 
                while ($item = DBA::fetch($items)) {
                        if (!empty($fields['body'])) {
+                               if (!empty($item['quote-uri-id'])) {
+                                       $fields['body'] = BBCode::removeSharedData($fields['body']);
+
+                                       if (!empty($fields['raw-body'])) {
+                                               $fields['raw-body'] = BBCode::removeSharedData($fields['raw-body']);
+                                       }
+                               }
+
                                Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 
                                $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
@@ -207,10 +220,7 @@ class Item
                                $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
                                $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 
-                               if ($item['author-network'] != Protocol::DFRN) {
-                                       Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
-                               }
-
+                               Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body'], $fields['body'], $item['author-network']);
                                Post\Content::update($item['uri-id'], $content_fields);
                        }
 
@@ -233,7 +243,7 @@ class Item
 
                foreach ($notify_items as $notify_item) {
                        $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
-                       Worker::add(PRIORITY_HIGH, 'Notifier', Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
+                       Worker::add(Worker::PRIORITY_HIGH, 'Notifier', Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
                }
 
                return $rows;
@@ -247,7 +257,7 @@ class Item
         * @return void
         * @throws \Friendica\Network\HTTPException\InternalServerErrorException
         */
-       public static function markForDeletion(array $condition, int $priority = PRIORITY_HIGH)
+       public static function markForDeletion(array $condition, int $priority = Worker::PRIORITY_HIGH)
        {
                $items = Post::select(['id'], $condition);
                while ($item = Post::fetch($items)) {
@@ -278,9 +288,9 @@ class Item
                        }
 
                        if ($item['uid'] == $uid) {
-                               self::markForDeletionById($item['id'], PRIORITY_HIGH);
+                               self::markForDeletionById($item['id'], Worker::PRIORITY_HIGH);
                        } elseif ($item['uid'] != 0) {
-                               Logger::notice('Wrong ownership. Not deleting item', ['id' => $item['id']]);
+                               Logger::warning('Wrong ownership. Not deleting item', ['id' => $item['id']]);
                        }
                }
                DBA::close($items);
@@ -294,7 +304,7 @@ class Item
         * @return boolean success
         * @throws \Friendica\Network\HTTPException\InternalServerErrorException
         */
-       public static function markForDeletionById(int $item_id, int $priority = PRIORITY_HIGH): bool
+       public static function markForDeletionById(int $item_id, int $priority = Worker::PRIORITY_HIGH): bool
        {
                Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
                // locate item to be deleted
@@ -327,7 +337,7 @@ class Item
                 * generate a resource-id and therefore aren't intimately linked to the item.
                 */
                /// @TODO: this should first check if photo is used elsewhere
-               if (strlen($item['resource-id'])) {
+               if ($item['resource-id']) {
                        Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
                }
 
@@ -357,7 +367,7 @@ class Item
                Post\DeliveryData::delete($item['uri-id']);
 
                // If it's the parent of a comment thread, kill all the kids
-               if ($item['gravity'] == GRAVITY_PARENT) {
+               if ($item['gravity'] == self::GRAVITY_PARENT) {
                        self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
                }
 
@@ -375,6 +385,9 @@ class Item
                        Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
                }
 
+               DI::notify()->deleteForItem($item['uri-id']);
+               DI::notification()->deleteForItem($item['uri-id']);
+
                Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 
                return true;
@@ -448,21 +461,46 @@ class Item
         */
        private static function contactId(array $item): int
        {
-               if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
-                       return $item['contact-id'];
-               } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
-                       return $item['contact-id'];
-               } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
+               if ($item['uid'] == 0) {
                        return $item['author-id'];
-               } elseif (!empty($item['contact-id'])) {
-                       return $item['contact-id'];
-               } else {
-                       $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
+               }
+
+               if ($item['origin']) {
+                       $owner = User::getOwnerDataById($item['uid']);
+                       return $owner['id'];
+               }
+
+               if (!empty($item['causer-id']) && Contact::isSharing($item['causer-id'], $item['uid'], true)) {
+                       $cdata = Contact::getPublicAndUserContactID($item['causer-id'], $item['uid']);
+                       if (!empty($cdata['user'])) {
+                               return $cdata['user'];
+                       }
+               }
+
+               if ($item['gravity'] == self::GRAVITY_PARENT) {
+                       if (Contact::isSharingByURL($item['owner-link'], $item['uid'], true)) {
+                               $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
+                       } else {
+                               $contact_id = Contact::getIdForURL($item['owner-link']);
+                       }
                        if (!empty($contact_id)) {
                                return $contact_id;
                        }
                }
-               return $item['author-id'];
+
+               if (Contact::isSharingByURL($item['author-link'], $item['uid'], true)) {
+                       $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
+               } else {
+                       $contact_id = Contact::getIdForURL($item['author-link']);
+               }
+
+               if (!empty($contact_id)) {
+                       return $contact_id;
+               }
+
+               Logger::warning('contact-id could not be fetched, using self contact instead.', ['uid' => $item['uid'], 'item' => $item]);
+               $self = Contact::selectFirst(['id'], ['self' => true, 'uid' => $item['uid']]);
+               return $self['id'];
        }
 
        /**
@@ -548,7 +586,7 @@ class Item
        public static function isValid(array $item): bool
        {
                // When there is no content then we don't post it
-               if (($item['body'] . $item['title'] == '') && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
+               if (($item['body'] . $item['title'] == '') && empty($item['quote-uri-id']) && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
                        Logger::notice('No body, no title.');
                        return false;
                }
@@ -556,7 +594,7 @@ class Item
                if (!empty($item['uid'])) {
                        $owner = User::getOwnerDataById($item['uid'], false);
                        if (!$owner) {
-                               Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
+                               Logger::warning('Missing item user owner data', ['uid' => $item['uid']]);
                                return false;
                        }
 
@@ -677,6 +715,26 @@ class Item
                return 0;
        }
 
+       /**
+        * Fetch the uri-id of the parent for the given uri-id
+        *
+        * @param integer $uriid
+        * @return integer
+        */
+       public static function getParent(int $uriid): int
+       {
+               $thread_parent = Post::selectFirstPost(['thr-parent-id', 'gravity'], ['uri-id' => $uriid]);
+               if (empty($thread_parent)) {
+                       return 0;
+               }
+
+               if ($thread_parent['gravity'] == Item::GRAVITY_PARENT) {
+                       return $uriid;
+               }
+
+               return self::getParent($thread_parent['thr-parent-id']);
+       }
+
        /**
         * Fetch top-level parent data for the given item array
         *
@@ -747,17 +805,60 @@ class Item
                if (isset($item['gravity'])) {
                        return intval($item['gravity']);
                } elseif ($item['parent-uri-id'] === $item['uri-id']) {
-                       return GRAVITY_PARENT;
+                       return self::GRAVITY_PARENT;
                } elseif ($activity->match($item['verb'], Activity::POST)) {
-                       return GRAVITY_COMMENT;
+                       return self::GRAVITY_COMMENT;
                } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
-                       return GRAVITY_ACTIVITY;
+                       return self::GRAVITY_ACTIVITY;
                } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
-                       return GRAVITY_ACTIVITY;
+                       return self::GRAVITY_ACTIVITY;
                }
 
                Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
-               return GRAVITY_UNKNOWN;   // Should not happen
+               return self::GRAVITY_UNKNOWN;   // Should not happen
+       }
+
+       private static function prepareOriginPost(array $item): array
+       {
+               $item['wall'] = 1;
+               $item['origin'] = 1;
+               $item['network'] = Protocol::DFRN;
+               $item['protocol'] = Conversation::PARCEL_DIRECT;
+               $item['direction'] = Conversation::PUSH;
+
+               $owner = User::getOwnerDataById($item['uid']);
+
+               if (empty($item['contact-id'])) {
+                       $item['contact-id'] = $owner['id'];
+               }
+
+               if (empty($item['author-link']) && empty($item['author-id'])) {
+                       $item['author-link']   = $owner['url'];
+                       $item['author-name']   = $owner['name'];
+                       $item['author-avatar'] = $owner['thumb'];
+               }
+
+               if (empty($item['owner-link']) && empty($item['owner-id'])) {
+                       $item['owner-link']   = $item['author-link'];
+                       $item['owner-name']   = $item['author-name'];
+                       $item['owner-avatar'] = $item['author-avatar'];
+               }
+
+               // Setting the object type if not defined before
+               if (empty($item['object-type'])) {
+                       $item['object-type'] = Activity\ObjectType::NOTE; // Default value
+                       $objectdata = BBCode::getAttachedData($item['body']);
+
+                       if ($objectdata['type'] == 'link') {
+                               $item['object-type'] = Activity\ObjectType::BOOKMARK;
+                       } elseif ($objectdata['type'] == 'video') {
+                               $item['object-type'] = Activity\ObjectType::VIDEO;
+                       } elseif ($objectdata['type'] == 'photo') {
+                               $item['object-type'] = Activity\ObjectType::IMAGE;
+                       }
+               }
+
+               return $item;
        }
 
        /**
@@ -772,17 +873,13 @@ class Item
        {
                $orig_item = $item;
 
-               $priority = PRIORITY_HIGH;
+               $priority = Worker::PRIORITY_HIGH;
 
                // If it is a posting where users should get notifications, then define it as wall posting
                if ($notify) {
-                       $item['wall'] = 1;
-                       $item['origin'] = 1;
-                       $item['network'] = Protocol::DFRN;
-                       $item['protocol'] = Conversation::PARCEL_DIRECT;
-                       $item['direction'] = Conversation::PUSH;
+                       $item = self::prepareOriginPost($item);
 
-                       if (is_int($notify) && in_array($notify, PRIORITIES)) {
+                       if (is_int($notify) && in_array($notify, Worker::PRIORITIES)) {
                                $priority = $notify;
                        }
                } else {
@@ -895,8 +992,6 @@ class Item
 
                $item['gravity'] = self::getGravity($item);
 
-               $item['language'] = self::getLanguage($item);
-
                $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
                        'photo' => $item['author-avatar'], 'network' => $item['network']];
                $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
@@ -911,7 +1006,6 @@ class Item
                Contact::checkAvatarCache($item['author-id']);
                Contact::checkAvatarCache($item['owner-id']);
 
-               // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
                $item['contact-id'] = self::contactId($item);
 
                if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
@@ -924,7 +1018,7 @@ class Item
                        return 0;
                }
 
-               if ($item['gravity'] !== GRAVITY_PARENT) {
+               if ($item['gravity'] !== self::GRAVITY_PARENT) {
                        $toplevel_parent = self::getTopLevelParent($item);
                        if (empty($toplevel_parent)) {
                                return 0;
@@ -941,6 +1035,7 @@ class Item
                        $item['parent-uri']    = $toplevel_parent['uri'];
                        $item['parent-uri-id'] = $toplevel_parent['uri-id'];
                        $item['deleted']       = $toplevel_parent['deleted'];
+                       $item['wall']          = $toplevel_parent['wall'];
 
                        // Reshares have to keep their permissions to allow forums to work
                        if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
@@ -1019,7 +1114,7 @@ class Item
                        }
 
                        // We have to tell the hooks who we are - this really should be improved
-                       if (!local_user()) {
+                       if (!DI::userSession()->getLocalUserId()) {
                                $_SESSION['authenticated'] = true;
                                $_SESSION['uid'] = $uid;
                                $dummy_session = true;
@@ -1072,24 +1167,36 @@ class Item
                        unset($item['attachments']);
                }
 
+               if (empty($item['quote-uri-id'])) {
+                       $quote_id = self::getQuoteUriId($item['body']);
+                       if (!empty($quote_id)) {
+                               // This is one of these "should not happen" situations.
+                               // The protocol implementations should already have done this job.
+                               Logger::notice('Quote-uri-id detected in post', ['id' => $quote_id, 'guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'callstack' => System::callstack(20)]);
+                               $item['quote-uri-id'] = $quote_id;
+                       }
+               }
+
+               if (!empty($item['quote-uri-id'])) {
+                       $item['raw-body'] = BBCode::removeSharedData($item['raw-body']);
+                       $item['body']     = BBCode::removeSharedData($item['body']);
+               }
+
                Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
 
                // Remove all media attachments from the body and store them in the post-media table
                $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
                $item['raw-body'] = self::setHashtags($item['raw-body']);
 
-               if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
-                       Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
-               }
+               $author = Contact::getById($item['author-id'], ['network']);
+               Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body'], $item['body'], $author['network'] ?? '');
 
                // Check for hashtags in the body and repair or add hashtag links
                $item['body'] = self::setHashtags($item['body']);
 
-               if (stristr($item['verb'], Activity::POKE)) {
-                       $notify_type = Delivery::POKE;
-               } else {
-                       $notify_type = Delivery::POST;
-               }
+               $item['language'] = self::getLanguage($item);
+
+               $notify_type = Delivery::POST;
 
                // Filling item related side tables
                if (!empty($item['attach'])) {
@@ -1139,7 +1246,7 @@ class Item
 
                Post::insert($item['uri-id'], $item);
 
-               if ($item['gravity'] == GRAVITY_PARENT) {
+               if ($item['gravity'] == self::GRAVITY_PARENT) {
                        Post\Thread::insert($item['uri-id'], $item);
                }
 
@@ -1148,7 +1255,7 @@ class Item
                }
 
                // Create Diaspora signature
-               if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
+               if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != self::GRAVITY_PARENT)) {
                        $signed = Diaspora::createCommentSignature($item);
                        if (!empty($signed)) {
                                $item['diaspora_signed_text'] = json_encode($signed);
@@ -1188,7 +1295,7 @@ class Item
                        return 0;
                }
 
-               if ($item['gravity'] == GRAVITY_PARENT) {
+               if ($item['gravity'] == self::GRAVITY_PARENT) {
                        $item['post-user-id'] = $post_user_id;
                        Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
                }
@@ -1206,7 +1313,7 @@ class Item
                // update the commented timestamp on the parent
                if (DI::config()->get('system', 'like_no_comment')) {
                        // Update when it is a comment
-                       $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
+                       $update_commented = in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]);
                } else {
                        // Update when it isn't a follow or tag verb
                        $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
@@ -1230,7 +1337,7 @@ class Item
                }
 
                if ($notify) {
-                       if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == GRAVITY_COMMENT)) {
+                       if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == self::GRAVITY_COMMENT)) {
                                Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
                        }
                        Hook::callAll('post_local_end', $posted_item);
@@ -1238,7 +1345,7 @@ class Item
                        Hook::callAll('post_remote_end', $posted_item);
                }
 
-               if ($posted_item['gravity'] === GRAVITY_PARENT) {
+               if ($posted_item['gravity'] === self::GRAVITY_PARENT) {
                        self::addShadow($post_user_id);
                } else {
                        self::addShadowPost($post_user_id);
@@ -1265,22 +1372,19 @@ class Item
                        }
                }
 
+               if (!empty($source) && ($transmit || DI::config()->get('debug', 'store_source'))) {
+                       Post\Activity::insert($item['uri-id'], $source);
+               }
+
                if ($transmit) {
-                       if (!empty($source)) {
-                               Post\Activity::insert($item['uri-id'], $source);
-                       }
                        Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
                }
 
                // Fill the cache with the rendered content.
-               if (in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
+               if (in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
                        self::updateDisplayCache($posted_item['uri-id']);
                }
 
-               if ($posted_item['origin'] && ($posted_item['uid'] != 0) && in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT])) {
-                       DI::cache()->delete(ActivityPub\Transmitter::CACHEKEY_OUTBOX . $posted_item['uid']);
-               }
-
                return $post_user_id;
        }
 
@@ -1293,7 +1397,7 @@ class Item
         */
        public static function getPostReason(array $item): int
        {
-               $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
+               $actor = ($item['gravity'] == self::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
                if (empty($item['origin']) && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
                        return self::PR_FOLLOWER;
                }
@@ -1374,7 +1478,7 @@ class Item
         */
        private static function distributeByTags(array $item)
        {
-               if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
+               if (($item['uid'] != 0) || ($item['gravity'] != self::GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
                        return;
                }
 
@@ -1500,6 +1604,14 @@ class Item
                        return 0;
                }
 
+               if (($uid != 0) && ($item['gravity'] == self::GRAVITY_PARENT)) {
+                       $owner = User::getOwnerDataById($uid);
+                       if (($owner['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && !Tag::isMentioned($uri_id, $owner['url'])) {
+                               Logger::info('Target user is a forum but is not mentioned here, thread will not be stored', ['uid' => $uid, 'uri-id' => $uri_id]);
+                               return 0;
+                       }
+               }
+
                if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
                        Logger::notice('Item is private or not from a federated network. It will not be stored for the user.', ['uri-id' => $uri_id, 'uid' => $uid, 'private' => $item['private'], 'network' => $item['network']]);
                        return 0;
@@ -1509,35 +1621,61 @@ class Item
 
                $item = array_merge($item, $fields);
 
-               $item['post-reason'] = self::getPostReason($item);
+               if (($uid != 0) && Contact::isSharing(($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'], $uid)) {
+                       $item['post-reason'] = self::PR_FOLLOWER;
+               }
 
-               $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
+               $is_reshare = ($item['gravity'] == self::GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
 
-               if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
+               if (($uid != 0) && (($item['gravity'] == self::GRAVITY_PARENT) || $is_reshare) &&
                        DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
-                       !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC])) {
-                       Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
+                       !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC, self::PR_ACTIVITY])) {
+                       Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid, 'uri-id' => $uri_id, 'post-reason' => $item['post-reason']]);
                        return 0;
                }
 
-               if (($uri_id != $item['thr-parent-id']) && (($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
-                       // Fetch the origin user for the post
-                       $origin_uid = self::GetOriginUidForUriId($item['thr-parent-id'], $uid);
-                       if (is_null($origin_uid)) {
-                               Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $item['thr-parent-id']]);
+               $causer = $item['causer-id'] ?: $item['author-id'];
+
+               if (($uri_id != $item['parent-uri-id']) && ($item['gravity'] == self::GRAVITY_COMMENT) && !Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
+                       if (!self::fetchParent($item['parent-uri-id'], $uid, $causer)) {
+                               Logger::info('Parent post had not been added', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
                                return 0;
                        }
-
-                       $causer = $item['causer-id'] ?: $item['author-id'];
-                       $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
-                       Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
+                       Logger::info('Fetched parent post', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
+               } elseif (($uri_id != $item['thr-parent-id']) && $is_reshare && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
+                       if (!self::fetchParent($item['thr-parent-id'], $uid, $causer)) {
+                               Logger::info('Thread parent had not been added', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
+                               return 0;
+                       }
+                       Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
                }
 
                $stored = self::storeForUser($item, $uid);
-               Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
+               Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'causer' => $causer, 'source-uid' => $source_uid, 'stored' => $stored]);
                return $stored;
        }
 
+       /**
+        * Fetch the parent with the given uri-id
+        *
+        * @param integer $uri_id
+        * @param integer $uid
+        * @param integer $causer
+        *
+        * @return integer
+        */
+       private static function fetchParent(int $uri_id, int $uid, int $causer): int
+       {
+               // Fetch the origin user for the post
+               $origin_uid = self::GetOriginUidForUriId($uri_id, $uid);
+               if (is_null($origin_uid)) {
+                       Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $uri_id]);
+                       return 0;
+               }
+
+               return self::storeForUserByUriId($uri_id, $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
+       }
+
        /**
         * Returns the origin uid of a post if the given user is allowed to see it.
         *
@@ -1598,20 +1736,21 @@ class Item
         */
        private static function storeForUser(array $item, int $uid): int
        {
-               if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
+               $post = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
+               if (!empty($post['id'])) {
                        if (!empty($item['event-id'])) {
-                               $post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
-                               if (!empty($post['event-id'])) {
+                               $event_post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
+                               if (!empty($event_post['event-id'])) {
                                        $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
                                        if (!empty($event)) {
                                                // We aren't using "Event::store" here, since we don't want to trigger any further action
-                                               $ret = DBA::update('event', $event, ['id' => $post['event-id']]);
-                                               Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $post['event-id'], 'ret' => $ret]);
+                                               $ret = DBA::update('event', $event, ['id' => $event_post['event-id']]);
+                                               Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $event_post['event-id'], 'ret' => $ret]);
                                        }
                                }
                        }
-                       Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
-                       return 0;
+                       Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'id' => $post['id']]);
+                       return $post['id'];
                }
 
                // Data from the "post-user" table
@@ -1635,28 +1774,10 @@ class Item
                $item['origin'] = 0;
                $item['wall'] = 0;
 
-               if ($item['gravity'] == GRAVITY_PARENT) {
-                       $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
-               } else {
-                       $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
-               }
-
-               if (!empty($contact['id'])) {
-                       $item['contact-id'] = $contact['id'];
-               } else {
-                       // Shouldn't happen at all
-                       Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
-                       $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
-                       if (!DBA::isResult($self)) {
-                               // Shouldn't happen even less
-                               Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
-                               return 0;
-                       }
-                       $item['contact-id'] = $self['id'];
-               }
+               $item['contact-id'] = self::contactId($item);
 
                $notify = false;
-               if ($item['gravity'] == GRAVITY_PARENT) {
+               if ($item['gravity'] == self::GRAVITY_PARENT) {
                        $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
                        if (DBA::isResult($contact)) {
                                $notify = self::isRemoteSelf($contact, $item);
@@ -1686,7 +1807,7 @@ class Item
        private static function addShadow(int $itemid)
        {
                $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
-               $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
+               $condition = ['id' => $itemid, 'gravity' => self::GRAVITY_PARENT];
                $item = Post::selectFirst($fields, $condition);
 
                if (!DBA::isResult($item)) {
@@ -1754,7 +1875,7 @@ class Item
                }
 
                // Is it a toplevel post?
-               if ($item['gravity'] == GRAVITY_PARENT) {
+               if ($item['gravity'] == self::GRAVITY_PARENT) {
                        self::addShadow($itemid);
                        return;
                }
@@ -1816,29 +1937,48 @@ class Item
                        return $item['language'];
                }
 
-               if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
+               if (!in_array($item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) || empty($item['body'])) {
+                       return '';
+               }
+
+               $languages = self::getLanguageArray(trim($item['title'] . "\n" . $item['body']), 3);
+               if (empty($languages)) {
                        return '';
                }
 
+               return json_encode($languages);
+       }
+
+       /**
+        * Get a language array from a given text
+        *
+        * @param string  $body
+        * @param integer $count
+        * @return array
+        */
+       public static function getLanguageArray(string $body, int $count): array
+       {
                // Convert attachments to links
-               $naked_body = BBCode::removeAttachment($item['body']);
+               $naked_body = BBCode::removeAttachment($body);
                if (empty($naked_body)) {
-                       return '';
+                       return [];
                }
 
                // Remove links and pictures
                $naked_body = BBCode::removeLinks($naked_body);
 
                // Convert the title and the body to plain text
-               $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
+               $naked_body = BBCode::toPlaintext($naked_body);
 
                // Remove possibly remaining links
                $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
 
                if (empty($naked_body)) {
-                       return '';
+                       return [];
                }
 
+               $naked_body = self::getDominantLanguage($naked_body);
+
                $availableLanguages = DI::l10n()->getAvailableLanguages();
                // See https://github.com/friendica/friendica/issues/10511
                // Persian is manually added to language detection until a persian translation is provided for the interface, at
@@ -1846,12 +1986,34 @@ class Item
                $availableLanguages['fa'] = 'fa';
 
                $ld = new Language(array_keys($availableLanguages));
-               $languages = $ld->detect($naked_body)->limit(0, 3)->close();
-               if (is_array($languages)) {
-                       return json_encode($languages);
-               }
+               return $ld->detect($naked_body)->limit(0, $count)->close() ?: [];
+       }
 
-               return '';
+       /**
+        * Check if latin or non latin are dominant in the body and only return the dominant one
+        *
+        * @param string $body
+        * @return string
+        */
+       private static function getDominantLanguage(string $body): string
+       {
+               $latin = '';
+               $non_latin = '';
+               for ($i = 0; $i < mb_strlen($body); $i++) {
+                       $character = mb_substr($body, $i, 1);
+                       $ord = mb_ord($character);
+
+                       // We add the most common characters to both strings.
+                       if (($ord <= 64) || ($ord >= 91 && $ord <= 96) || ($ord >= 123 && $ord <= 191) || in_array($ord, [215, 247]) || ($ord >= 697 && $ord <= 735) || ($ord > 65535)) {
+                               $latin .= $character;
+                               $non_latin .= $character;
+                       } elseif ($ord < 768) {
+                               $latin .= $character;
+                       } else {
+                               $non_latin .= $character;
+                       }
+               }
+               return (mb_strlen($latin) > mb_strlen($non_latin)) ? $latin : $non_latin;
        }
 
        public static function getLanguageMessage(array $item): string
@@ -1872,9 +2034,10 @@ class Item
         * Posts that are created on this system are using System::createUUID.
         * Received ActivityPub posts are using Processor::getGUIDByURL.
         *
-        * @param string      $uri uri of an item entry
+        * @param string      $uri  uri of an item entry
         * @param string|null $host hostname for the GUID prefix
         * @return string Unique guid
+        * @throws \Exception
         */
        public static function guidFromUri(string $uri, string $host = null): string
        {
@@ -1885,11 +2048,16 @@ class Item
                // Remove the scheme to make sure that "https" and "http" doesn't make a difference
                unset($parsed['scheme']);
 
+               $hostPart = $host ?? $parsed['host'] ?? '';
+               if (!$hostPart) {
+                       Logger::warning('Empty host GUID part', ['uri' => $uri, 'host' => $host, 'parsed' => $parsed, 'callstack' => System::callstack(10)]);
+               }
+
                // Glue it together to be able to make a hash from it
                $host_id = implode('/', $parsed);
 
                // Use a mixture of several hashes to provide some GUID like experience
-               return hash('crc32', $host) . '-'. hash('joaat', $host_id) . '-'. hash('fnv164', $host_id);
+               return hash('crc32', $hostPart) . '-' . hash('joaat', $host_id) . '-' . hash('fnv164', $host_id);
        }
 
        /**
@@ -1952,15 +2120,15 @@ class Item
                        } else {
                                $condition = ['id' => $arr['contact-id'], 'self' => false];
                        }
-                       Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
+                       Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
                }
                // Now do the same for the system wide contacts with uid=0
                if ($arr['private'] != self::PRIVATE) {
-                       Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
+                       Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
                                ['id' => $arr['owner-id']]);
 
                        if ($arr['owner-id'] != $arr['author-id']) {
-                               Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
+                               Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
                                        ['id' => $arr['author-id']]);
                        }
                }
@@ -2055,22 +2223,16 @@ class Item
                        return false;
                }
 
-               $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [GRAVITY_PARENT, GRAVITY_COMMENT], 'origin' => false]);
+               $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [self::GRAVITY_PARENT, self::GRAVITY_COMMENT], 'origin' => false]);
                if (!DBA::isResult($item)) {
                        Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
                        return false;
                }
 
-               if ($item['gravity'] == GRAVITY_PARENT) {
-                       $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
-                       foreach ($tags as $tag) {
-                               if (Strings::compareLink($owner['url'], $tag['url'])) {
-                                       $mention = true;
-                                       Logger::info('Mention found in tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
-                               }
-                       }
-
-                       if (!$mention) {
+               if ($item['gravity'] == self::GRAVITY_PARENT) {
+                       if (Tag::isMentioned($item['uri-id'], $owner['url'])) {
+                               Logger::info('Mention found in tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
+                       } else {
                                Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
                                Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
                                return true;
@@ -2080,15 +2242,9 @@ class Item
 
                        Hook::callAll('tagged', $arr);
                } else {
-                       $tags = Tag::getByURIId($item['parent-uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
-                       foreach ($tags as $tag) {
-                               if (Strings::compareLink($owner['url'], $tag['url'])) {
-                                       $mention = true;
-                                       Logger::info('Mention found in parent tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
-                               }
-                       }
-
-                       if (!$mention) {
+                       if (Tag::isMentioned($item['parent-uri-id'], $owner['url'])) {
+                               Logger::info('Mention found in parent tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
+                       } else {
                                Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
                                return false;
                        }
@@ -2118,7 +2274,12 @@ class Item
         */
        private static function autoReshare(array $item)
        {
-               if ($item['gravity'] != GRAVITY_PARENT) {
+               if ($item['gravity'] != self::GRAVITY_PARENT) {
+                       return;
+               }
+
+               $cdata = Contact::getPublicAndUserContactID($item['author-id'], $item['uid']);
+               if (empty($cdata['user']) || ($cdata['user'] != $item['contact-id'])) {
                        return;
                }
 
@@ -2137,24 +2298,24 @@ class Item
 
        public static function isRemoteSelf(array $contact, array &$datarray): bool
        {
-               if (!$contact['remote_self']) {
+               if ($contact['remote_self'] != Contact::MIRROR_OWN_POST) {
                        return false;
                }
 
                // Prevent the forwarding of posts that are forwarded
-               if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
+               if (!empty($datarray['extid']) && ($datarray['extid'] == Protocol::DFRN)) {
                        Logger::info('Already forwarded');
                        return false;
                }
 
                // Prevent to forward already forwarded posts
-               if ($datarray["app"] == DI::baseUrl()->getHostname()) {
+               if ($datarray['app'] == DI::baseUrl()->getHostname()) {
                        Logger::info('Already forwarded (second test)');
                        return false;
                }
 
                // Only forward posts
-               if ($datarray["verb"] != Activity::POST) {
+               if ($datarray['verb'] != Activity::POST) {
                        Logger::info('No post');
                        return false;
                }
@@ -2166,53 +2327,48 @@ class Item
 
                $datarray2 = $datarray;
                Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
-               if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
-                       $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
-                                       ['uid' => $contact['uid'], 'self' => true]);
-                       if (DBA::isResult($self)) {
-                               $datarray['contact-id'] = $self["id"];
-
-                               $datarray['owner-name'] = $self["name"];
-                               $datarray['owner-link'] = $self["url"];
-                               $datarray['owner-avatar'] = $self["thumb"];
-
-                               $datarray['author-name']   = $datarray['owner-name'];
-                               $datarray['author-link']   = $datarray['owner-link'];
-                               $datarray['author-avatar'] = $datarray['owner-avatar'];
-
-                               unset($datarray['edited']);
-
-                               unset($datarray['network']);
-                               unset($datarray['owner-id']);
-                               unset($datarray['author-id']);
-                       }
-
-                       if ($contact['network'] != Protocol::FEED) {
-                               $old_uri_id = $datarray["uri-id"] ?? 0;
-                               $datarray["guid"] = System::createUUID();
-                               unset($datarray["plink"]);
-                               $datarray["uri"] = self::newURI($datarray["guid"]);
-                               $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
-                               $datarray["extid"] = Protocol::DFRN;
-                               $urlpart = parse_url($datarray2['author-link']);
-                               $datarray["app"] = $urlpart["host"];
-                               if (!empty($old_uri_id)) {
-                                       Post\Media::copy($old_uri_id, $datarray["uri-id"]);
-                               }
 
-                               unset($datarray["parent-uri"]);
-                               unset($datarray["thr-parent"]);
-                       } else {
-                               $datarray['private'] = self::PUBLIC;
-                       }
+               $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
+                                       ['uid' => $contact['uid'], 'self' => true]);
+               if (!DBA::isResult($self)) {
+                       Logger::error('Self contact not found', ['uid' => $contact['uid']]);
+                       return false;
                }
 
+               $datarray['contact-id'] = $self['id'];
+
+               $datarray['author-name']   = $datarray['owner-name']   = $self['name'];
+               $datarray['author-link']   = $datarray['owner-link']   = $self['url'];
+               $datarray['author-avatar'] = $datarray['owner-avatar'] = $self['thumb'];
+
+               unset($datarray['edited']);
+
+               unset($datarray['network']);
+               unset($datarray['owner-id']);
+               unset($datarray['author-id']);
+
                if ($contact['network'] != Protocol::FEED) {
+                       $old_uri_id = $datarray['uri-id'] ?? 0;
+                       $datarray['guid'] = System::createUUID();
+                       unset($datarray['plink']);
+                       $datarray['uri'] = self::newURI($datarray['guid']);
+                       $datarray['uri-id'] = ItemURI::getIdByURI($datarray['uri']);
+                       $datarray['extid'] = Protocol::DFRN;
+                       $urlpart = parse_url($datarray2['author-link']);
+                       $datarray['app'] = $urlpart['host'];
+                       if (!empty($old_uri_id)) {
+                               Post\Media::copy($old_uri_id, $datarray['uri-id']);
+                       }
+
+                       unset($datarray['parent-uri']);
+                       unset($datarray['thr-parent']);
+
                        // Store the original post
                        $result = self::insert($datarray2);
                        Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
                } else {
-                       $datarray["app"] = "Feed";
+                       $datarray['private'] = self::PUBLIC;
+                       $datarray['app'] = 'Feed';
                        $result = true;
                }
 
@@ -2379,7 +2535,7 @@ class Item
                }
 
                $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
-                       $uid, GRAVITY_PARENT];
+                       $uid, self::GRAVITY_PARENT];
 
                /*
                 * $expire_network_only = save your own wall posts
@@ -2405,16 +2561,16 @@ class Item
                        return;
                }
 
-               $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
+               $expire_items = (bool)DI::pConfig()->get($uid, 'expire', 'items', true);
 
                // Forcing expiring of items - but not notes and marked items
                if ($force) {
                        $expire_items = true;
                }
 
-               $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
-               $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
-               $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
+               $expire_notes = (bool)DI::pConfig()->get($uid, 'expire', 'notes', true);
+               $expire_starred = (bool)DI::pConfig()->get($uid, 'expire', 'starred', true);
+               $expire_photos = (bool)DI::pConfig()->get($uid, 'expire', 'photos', false);
 
                $expired = 0;
 
@@ -2443,7 +2599,7 @@ class Item
                        ++$expired;
                }
                DBA::close($items);
-               Logger::notice('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
+               Logger::notice('Expired', ['user' => $uid, 'days' => $days, 'network' => $network, 'force' => $force, 'expired' => $expired, 'expire items' => $expire_items, 'expire notes' => $expire_notes, 'expire starred' => $expire_starred, 'expire photos' => $expire_photos, 'condition' => $condition]);
        }
 
        public static function firstPostDate(int $uid, bool $wall = false)
@@ -2497,7 +2653,7 @@ class Item
 
                $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
                if (!DBA::isResult($item)) {
-                       Logger::notice('like: unknown item', ['id' => $item_id]);
+                       Logger::warning('Post had not been fetched', ['id' => $item_id]);
                        return false;
                }
 
@@ -2526,7 +2682,7 @@ class Item
                }
 
                // Retrieve the current logged in user's public contact
-               $author_id = Contact::getIdForURL($owner['url']);
+               $author_id = Contact::getPublicIdByUserId($uid);
                if (empty($author_id)) {
                        Logger::info('Empty public contact');
                        return false;
@@ -2563,7 +2719,7 @@ class Item
                                $activity = Activity::ANNOUNCE;
                                break;
                        default:
-                               Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
+                               Logger::warning('unknown verb', ['verb' => $verb, 'item' => $item_id]);
                                return false;
                }
 
@@ -2586,8 +2742,8 @@ class Item
                        $vids = Verb::getID($activity);
                }
 
-               $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
-                       'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
+               $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => self::GRAVITY_ACTIVITY,
+                       'author-id' => $author_id, 'uid' => $uid, 'thr-parent-id' => $uri_id];
                $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
 
                if (DBA::isResult($like_item)) {
@@ -2633,14 +2789,14 @@ class Item
                $new_item = [
                        'guid'          => System::createUUID(),
                        'uri'           => self::newURI(),
-                       'uid'           => $item['uid'],
+                       'uid'           => $uid,
                        'contact-id'    => $owner['id'],
                        'wall'          => $item['wall'],
                        'origin'        => 1,
                        'network'       => Protocol::DFRN,
                        'protocol'      => Conversation::PARCEL_DIRECT,
                        'direction'     => Conversation::PUSH,
-                       'gravity'       => GRAVITY_ACTIVITY,
+                       'gravity'       => self::GRAVITY_ACTIVITY,
                        'parent'        => $item['id'],
                        'thr-parent'    => $item['uri'],
                        'owner-id'      => $author_id,
@@ -2656,22 +2812,20 @@ class Item
                        'unseen'        => 1,
                ];
 
-               $signed = Diaspora::createLikeSignature($uid, $new_item);
-               if (!empty($signed)) {
-                       $new_item['diaspora_signed_text'] = json_encode($signed);
+               if (in_array($activity, [Activity::LIKE, Activity::DISLIKE])) {
+                       $signed = Diaspora::createLikeSignature($uid, $new_item);
+                       if (!empty($signed)) {
+                               $new_item['diaspora_signed_text'] = json_encode($signed);
+                       }
                }
 
-               $new_item_id = self::insert($new_item);
+               self::insert($new_item, true);
 
                // If the parent item isn't visible then set it to visible
+               // @todo Check if this is still needed
                if (!$item['visible']) {
                        self::update(['visible' => true], ['id' => $item['id']]);
                }
-
-               $new_item['id'] = $new_item_id;
-
-               Hook::callAll('post_local_end', $new_item);
-
                return true;
        }
 
@@ -2683,8 +2837,8 @@ class Item
         */
        public static function getPermissionsConditionArrayByUserId(int $owner_id): array
        {
-               $local_user = local_user();
-               $remote_user = Session::getRemoteContactID($owner_id);
+               $local_user = DI::userSession()->getLocalUserId();
+               $remote_user = DI::userSession()->getRemoteContactID($owner_id);
 
                // default permissions - anonymous user
                $condition = ["`private` != ?", self::PRIVATE];
@@ -2715,8 +2869,8 @@ class Item
         */
        public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
        {
-               $local_user = local_user();
-               $remote_user = Session::getRemoteContactID($owner_id);
+               $local_user = DI::userSession()->getLocalUserId();
+               $remote_user = DI::userSession()->getRemoteContactID($owner_id);
 
                if (!empty($table)) {
                        $table = DBA::quoteIdentifier($table) . '.';
@@ -2767,9 +2921,9 @@ class Item
                        return $l10n->t('event');
                } elseif (!empty($item['resource-id'])) {
                        return $l10n->t('photo');
-               } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
+               } elseif ($item['gravity'] == self::GRAVITY_ACTIVITY) {
                        return $l10n->t('activity');
-               } elseif ($item['gravity'] == GRAVITY_COMMENT) {
+               } elseif ($item['gravity'] == self::GRAVITY_COMMENT) {
                        return $l10n->t('comment');
                }
 
@@ -2857,23 +3011,48 @@ class Item
                $item['hashtags'] = $tags['hashtags'];
                $item['mentions'] = $tags['mentions'];
 
-               $body = $item['body'] ?? '';
-               $shared = BBCode::fetchShareAttributes($body);
-               if (!empty($shared['guid'])) {
-                       $shared_item = Post::selectFirst(['uri-id', 'plink', 'has-media'], ['guid' => $shared['guid']]);
-                       $shared_uri_id = $shared_item['uri-id'] ?? 0;
-                       $shared_links = [strtolower($shared_item['plink'] ?? '')];
-                       $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid'], [], $shared_item['has-media'] ?? false);
+               $body = $item['body'] = Post\Media::removeFromEndOfBody($item['body'] ?? '');
+
+               $fields = ['uri-id', 'uri', 'body', 'title', 'author-name', 'author-link', 'author-avatar', 'guid', 'created', 'plink', 'network', 'has-media', 'quote-uri-id', 'post-type'];
+
+               $shared_uri_id = 0;
+               $shared_links  = [];
+
+               $shared = DI::contentItem()->getSharedPost($item, $fields);
+               if (!empty($shared['post'])) {
+                       $shared_item  = $shared['post'];
+                       $quote_uri_id = $shared['post']['uri-id'];
+                       $shared_links[] = strtolower($shared['post']['uri']);
+                       $item['body'] = BBCode::removeSharedData($item['body']);
+               } elseif (empty($shared_item['uri-id']) && empty($item['quote-uri-id']) && ($item['network'] != Protocol::DIASPORA)) {
+                       $media = Post\Media::getByURIId($item['uri-id'], [Post\Media::ACTIVITY]);
+                       if (!empty($media)) {
+                               $shared_item = Post::selectFirst($fields, ['plink' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
+
+                               if (empty($shared_item['uri-id'])) {
+                                       $shared_item = Post::selectFirst($fields, ['uri' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
+                                       $shared_links[] = strtolower($media[0]['url']);
+                               }
+
+                               $quote_uri_id = $shared_item['uri-id'] ?? 0;
+                       }
+               }
+
+               if (!empty($quote_uri_id)) {
+                       $item['body'] .= "\n" . DI::contentItem()->createSharedBlockByArray($shared_item);
+               }
+
+               if (!empty($shared_item['uri-id'])) {
+                       $shared_uri_id = $shared_item['uri-id'];
+                       $shared_links[] = strtolower($shared_item['plink']);
+                       $shared_attachments = Post\Media::splitAttachments($shared_uri_id, [], $shared_item['has-media']);
                        $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
                        $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
                        $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
                        $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
-               } else {
-                       $shared_uri_id = 0;
-                       $shared_links = [];
                }
 
-               $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links, $item['has-media'] ?? false);
+               $attachments = Post\Media::splitAttachments($item['uri-id'], $shared_links, $item['has-media'] ?? false);
                $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
 
                $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
@@ -2887,8 +3066,8 @@ class Item
 
                // Compile eventual content filter reasons
                $filter_reasons = [];
-               if (!$is_preview && public_contact() != $item['author-id']) {
-                       if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
+               if (!$is_preview && DI::userSession()->getPublicContactId() != $item['author-id']) {
+                       if (!empty($item['content-warning']) && (!DI::userSession()->getLocalUserId() || !DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'disable_cw', false))) {
                                $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
                        }
 
@@ -2921,10 +3100,10 @@ class Item
                }
 
                if (!empty($shared_attachments)) {
-                       $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
+                       $s = self::addVisualAttachments($shared_attachments, $shared_item, $s, true);
                        $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
                        $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
-                       $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
+                       $body = BBCode::removeSharedData($body);
                }
 
                $s = self::addVisualAttachments($attachments, $item, $s, false);
@@ -2966,11 +3145,20 @@ class Item
        {
                // Make sure that for example site parameters aren't used when testing if the link is contained in the body
                $urlparts = parse_url($url);
-               if (!empty($urlparts)) {
-                       unset($urlparts['query']);
-                       unset($urlparts['fragment']);
+               if (empty($urlparts)) {
+                       return false;
+               }
+
+               unset($urlparts['query']);
+               unset($urlparts['fragment']);
+
+               try {
                        $url = (string)Uri::fromParts($urlparts);
-               } else {
+               } catch (\InvalidArgumentException $e) {
+                       DI::logger()->notice('Invalid URL', ['$url' => $url, '$urlparts' => $urlparts]);
+                       /* See https://github.com/friendica/friendica/issues/12113
+                        * Malformed URLs will result in a Fatal Error
+                        */
                        return false;
                }
 
@@ -2983,12 +3171,14 @@ class Item
                if (strpos($body, $url)) {
                        return true;
                }
+
                foreach ([0, 1, 2] as $size) {
                        if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
                                strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
                                return true;
                        }
                }
+
                return false;
        }
 
@@ -3033,8 +3223,9 @@ class Item
        private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared): string
        {
                DI::profiler()->startRecording('rendering');
-               $leading = '';
+               $leading  = '';
                $trailing = '';
+               $images   = [];
 
                // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
                foreach ($attachments['visual'] as $attachment) {
@@ -3042,12 +3233,18 @@ class Item
                                continue;
                        }
 
-                       if (!empty($attachment['preview'])) {
+                       if ($attachment['filetype'] == 'image') {
+                               $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
+                       } elseif (!empty($attachment['preview'])) {
                                $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
                        } else {
                                $preview_url = '';
                        }
 
+                       if ($preview_url && self::containsLink($item['body'], $preview_url)) {
+                               continue;
+                       }
+
                        if (($attachment['filetype'] == 'video')) {
                                /// @todo Move the template to /content as well
                                $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
@@ -3079,19 +3276,23 @@ class Item
                                        $trailing .= $media;
                                }
                        } elseif ($attachment['filetype'] == 'image') {
-                               $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
-                                       '$image' => [
-                                               'src'        => Post\Media::getUrlForId($attachment['id']),
-                                               'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
-                                               'attachment' => $attachment,
-                                       ],
-                               ]);
-                               // On Diaspora posts the attached pictures are leading
-                               if ($item['network'] == Protocol::DIASPORA) {
-                                       $leading .= $media;
-                               } else {
-                                       $trailing .= $media;
+                               $src_url = Post\Media::getUrlForId($attachment['id']);
+                               if (self::containsLink($item['body'], $src_url)) {
+                                       continue;
                                }
+                               $images[] = ['src' => $src_url, 'preview' => $preview_url, 'attachment' => $attachment];
+                       }
+               }
+
+               foreach ($images as $image) {
+                       $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
+                               '$image' => $image,
+                       ]);
+                       // On Diaspora posts the attached pictures are leading
+                       if ($item['network'] == Protocol::DIASPORA) {
+                               $leading .= $media;
+                       } else {
+                               $trailing .= $media;
                        }
                }
 
@@ -3192,7 +3393,7 @@ class Item
                }
                DI::profiler()->stopRecording();
 
-               if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
+               if (isset($data['url']) && !in_array(strtolower($data['url']), $ignore_links)) {
                        if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
                                $parts = parse_url($data['url']);
                                if (!empty($parts['scheme']) && !empty($parts['host'])) {
@@ -3209,7 +3410,10 @@ class Item
                                }
 
                                // @todo Use a template
-                               $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
+                               $preview_mode =  DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'preview_mode', BBCode::PREVIEW_LARGE);
+                               if ($preview_mode != BBCode::PREVIEW_NONE) {
+                                       $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid, $preview_mode);
+                               }
                        } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
                                $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
                                        '$url'  => $data['url'],
@@ -3281,21 +3485,18 @@ class Item
 
                        $options = Post\QuestionOption::getByURIId($item['uri-id']);
                        foreach ($options as $key => $option) {
-                               $percent = $question['voters'] ? ($option['replies'] / $question['voters'] * 100) : 0;
-
-                               $options[$key]['percent'] = $percent;
-
                                if ($question['voters'] > 0) {
-                                       $options[$key]['vote'] = DI::l10n()->t('%s (%d%s, %d votes)', $option['name'], round($percent, 1), '%', $option['replies']);
+                                       $percent = $option['replies'] / $question['voters'] * 100;
+                                       $options[$key]['vote'] = DI::l10n()->tt('%2$s (%3$d%%, %1$d vote)', '%2$s (%3$d%%, %1$d votes)', $option['replies'], $option['name'], round($percent, 1));
                                } else {
-                                       $options[$key]['vote'] = DI::l10n()->t('%s (%d votes)', $option['name'], $option['replies']);
+                                       $options[$key]['vote'] = DI::l10n()->tt('%2$s (%1$d vote)', '%2$s (%1$d votes)', $option['replies'], $option['name']);
                                }
                        }
 
                        if (!empty($question['voters']) && !empty($question['endtime'])) {
-                               $summary = DI::l10n()->t('%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
+                               $summary = DI::l10n()->tt('%d voter. Poll end: %s', '%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
                        } elseif (!empty($question['voters'])) {
-                               $summary = DI::l10n()->t('%d voters.', $question['voters']);
+                               $summary = DI::l10n()->tt('%d voter.', '%d voters.', $question['voters']);
                        } elseif (!empty($question['endtime'])) {
                                $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
                        } else {
@@ -3327,7 +3528,7 @@ class Item
                        $plink = $item['uri'];
                }
 
-               if (local_user()) {
+               if (DI::userSession()->getLocalUserId()) {
                        $ret = [
                                'href' => "display/" . $item['guid'],
                                'orig' => "display/" . $item['guid'],
@@ -3473,78 +3674,6 @@ class Item
                return 0;
        }
 
-       /**
-        * Return share data from an item array (if the item is shared item)
-        * We are providing the complete Item array, because at some time in the future
-        * we hopefully will define these values not in the body anymore but in some item fields.
-        * This function is meant to replace all similar functions in the system.
-        *
-        * @param array $item
-        *
-        * @return array with share information
-        */
-       public static function getShareArray(array $item): array
-       {
-               return BBCode::fetchShareAttributes($item['body']);
-       }
-
-       /**
-        * Fetch item information for shared items from the original items and adds it.
-        *
-        * @param array $item
-        *
-        * @return array item array with data from the original item
-        */
-       public static function addShareDataFromOriginal(array $item): array
-       {
-               $shared = self::getShareArray($item);
-               if (empty($shared)) {
-                       return $item;
-               }
-
-               // Real reshares always have got a GUID.
-               if (empty($shared['guid'])) {
-                       return $item;
-               }
-
-               $uid = $item['uid'] ?? 0;
-
-               // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
-               $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
-               if (!DBA::isResult($shared_item)) {
-                       if (empty($shared['link'])) {
-                               return $item;
-                       }
-
-                       // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
-                       $id = self::fetchByLink($shared['link'] ?? '', $uid);
-                       if (empty($id)) {
-                               Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
-                               return $item;
-                       }
-
-                       $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
-                       if (!DBA::isResult($shared_item)) {
-                               return $item;
-                       }
-                       Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
-               } else {
-                       Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
-               }
-
-               if (!empty($shared_item['title'])) {
-                       $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
-                       unset($shared_item['title']);
-               } else {
-                       $body = $shared_item['body'];
-               }
-
-               $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . str_replace('$', '\$', $body) . '[/share]', $item['body']);
-               unset($shared_item['body']);
-
-               return array_merge($item, $shared_item);
-       }
-
        /**
         * Check a prospective item array against user-level permissions
         *
@@ -3574,7 +3703,7 @@ class Item
                        return false;
                }
 
-               if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
+               if (!empty($item['causer-id']) && ($item['gravity'] === self::GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
                        Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
                        return false;
                }
@@ -3583,39 +3712,61 @@ class Item
        }
 
        /**
-        * Improve the data in shared posts
+        * Fetch the uri-id of a quote
         *
-        * @param array $item
-        * @return string body
+        * @param string $body
+        * @return integer
         */
-       public static function improveSharedDataInBody(array $item): string
+       public static function getQuoteUriId(string $body, int $uid = 0): int
        {
-               $shared = BBCode::fetchShareAttributes($item['body']);
-               if (empty($shared['link'])) {
-                       return $item['body'];
+               $shared = BBCode::fetchShareAttributes($body);
+               if (empty($shared['guid']) && empty($shared['message_id'])) {
+                       return 0;
                }
 
-               $id = self::fetchByLink($shared['link']);
-               Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
-               if (!$id) {
-                       return $item['body'];
+               if (empty($shared['link']) && empty($shared['message_id'])) {
+                       Logger::notice('Invalid share block.', ['share' => $shared]);
+                       return 0;
                }
 
-               $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
-               if (!DBA::isResult($shared_item)) {
-                       return $item['body'];
+               if (!empty($shared['guid'])) {
+                       $shared_item = Post::selectFirst(['uri-id'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
+                       if (!empty($shared_item['uri-id'])) {
+                               Logger::debug('Found post by guid', ['guid' => $shared['guid'], 'uid' => $uid]);
+                               return $shared_item['uri-id'];
+                       }
                }
 
-               $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
+               if (!empty($shared['message_id'])) {
+                       $shared_item = Post::selectFirst(['uri-id'], ['uri' => $shared['message_id'], 'uid' => [0, $uid]]);
+                       if (!empty($shared_item['uri-id'])) {
+                               Logger::debug('Found post by message_id', ['message_id' => $shared['message_id'], 'uid' => $uid]);
+                               return $shared_item['uri-id'];
+                       }
+               }
 
-               if (!empty($shared_item['title'])) {
-                       $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
+               if (!empty($shared['link'])) {
+                       $shared_item = Post::selectFirst(['uri-id'], ['plink' => $shared['link'], 'uid' => [0, $uid]]);
+                       if (!empty($shared_item['uri-id'])) {
+                               Logger::debug('Found post by link', ['link' => $shared['link'], 'uid' => $uid]);
+                               return $shared_item['uri-id'];
+                       }
                }
 
-               $shared_content .= $shared_item['body'];
+               $url = $shared['message_id'] ?: $shared['link'];
+               $id = self::fetchByLink($url);
+               if (!$id) {
+                       Logger::notice('Post could not be fetched.', ['url' => $url, 'uid' => $uid]);
+                       return 0;
+               }
 
-               $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
-               Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
-               return $item['body'];
+               $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
+               if (!empty($shared_item['uri-id'])) {
+                       Logger::debug('Fetched shared post', ['id' => $id, 'url' => $url, 'uid' => $uid]);
+                       return $shared_item['uri-id'];
+               }
+
+               Logger::warning('Post does not exist although it was supposed to had been fetched.', ['id' => $id, 'url' => $url, 'uid' => $uid]);
+               return 0;
        }
 }