]> git.mxchange.org Git - friendica.git/blobdiff - src/Model/Item.php
Merge pull request #4766 from MrPetovan/task/4721-group-button-color
[friendica.git] / src / Model / Item.php
index 15b1312dd4744cf6456aee454aad12f38f270db7..bdb85af44141e28f5bad05507af81338283ce1a0 100644 (file)
@@ -6,17 +6,31 @@
 
 namespace Friendica\Model;
 
+use Friendica\BaseObject;
+use Friendica\Core\Addon;
+use Friendica\Core\Config;
+use Friendica\Core\L10n;
+use Friendica\Core\PConfig;
+use Friendica\Core\System;
 use Friendica\Core\Worker;
-use Friendica\Model\Term;
-use Friendica\Model\Contact;
 use Friendica\Database\DBM;
+use Friendica\Model\Contact;
+use Friendica\Model\Conversation;
+use Friendica\Model\Group;
+use Friendica\Model\Term;
+use Friendica\Object\Image;
+use Friendica\Protocol\Diaspora;
+use Friendica\Protocol\OStatus;
+use Friendica\Util\DateTimeFormat;
+use Friendica\Util\XML;
 use dba;
+use Text_LanguageDetect;
 
-require_once 'include/tags.php';
-require_once 'include/threads.php';
+require_once 'boot.php';
 require_once 'include/items.php';
+require_once 'include/text.php';
 
-class Item
+class Item extends BaseObject
 {
        /**
         * @brief Update existing item entries
@@ -49,26 +63,49 @@ class Item
                // The condition needn't to be a simple array but could be a complex condition.
                $items = dba::select('item', ['id', 'origin'], $condition);
                while ($item = dba::fetch($items)) {
+                       Term::insertFromTagFieldByItemId($item['id']);
+                       Term::insertFromFileFieldByItemId($item['id']);
+                       self::updateThread($item['id']);
+
                        // We only need to notfiy others when it is an original entry from us
-                       if (!$item['origin']) {
-                               continue;
+                       if ($item['origin']) {
+                               Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
                        }
-
-                       create_tags_from_item($item['id']);
-                       Term::createFromItem($item['id']);
-                       update_thread($item['id']);
-
-                       Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
                }
 
                return $rows;
        }
 
-       public static function delete(array $condition, $priority = PRIORITY_HIGH)
+       /**
+        * @brief Delete an item and notify others about it - if it was ours
+        *
+        * @param array $condition The condition for finding the item entries
+        * @param integer $priority Priority for the notification
+        */
+       public static function delete($condition, $priority = PRIORITY_HIGH)
+       {
+               $items = dba::select('item', ['id'], $condition);
+               while ($item = dba::fetch($items)) {
+                       self::deleteById($item['id'], $priority);
+               }
+               dba::close($items);
+       }
+
+       /**
+        * @brief Delete an item and notify others about it - if it was ours
+        *
+        * @param integer $item_id Item ID that should be delete
+        * @param integer $priority Priority for the notification
+        *
+        * @return boolean success
+        */
+       public static function deleteById($item_id, $priority = PRIORITY_HIGH)
        {
-/*
                // locate item to be deleted
-               $item = dba::selectFirst('item', [], $condition);
+               $fields = ['id', 'uid', 'parent', 'parent-uri', 'origin', 'deleted',
+                       'file', 'resource-id', 'event-id', 'attach',
+                       'verb', 'object-type', 'object', 'target', 'contact-id'];
+               $item = dba::selectFirst('item', $fields, ['id' => $item_id]);
                if (!DBM::is_result($item)) {
                        return false;
                }
@@ -77,9 +114,10 @@ class Item
                        return false;
                }
 
-               $owner = $item['uid'];
-
-               $contact_id = 0;
+               $parent = dba::selectFirst('item', ['origin'], ['id' => $item['parent']]);
+               if (!DBM::is_result($parent)) {
+                       $parent = ['origin' => false];
+               }
 
                logger('delete item: ' . $item['id'], LOGGER_DEBUG);
 
@@ -102,19 +140,19 @@ class Item
                        }
                }
 
-               //*
-               // * If item is a link to a photo resource, nuke all the associated photos
-               // * (visitors will not have photo resources)
-               // * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
-               // * generate a resource-id and therefore aren't intimately linked to the item.
-               // *
+               /*
+                * If item is a link to a photo resource, nuke all the associated photos
+                * (visitors will not have photo resources)
+                * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
+                * generate a resource-id and therefore aren't intimately linked to the item.
+                */
                if (strlen($item['resource-id'])) {
                        dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
                }
 
-               // If item is a link to an event, nuke the event record.
+               // If item is a link to an event, delete the event.
                if (intval($item['event-id'])) {
-                       dba::delete('event', ['id' => $item['event-id'], 'uid' => $item['uid']]);
+                       Event::delete($item['event-id']);
                }
 
                // If item has attachments, drop them
@@ -123,67 +161,681 @@ class Item
                        dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
                }
 
+               // Delete tags that had been attached to other items
+               self::deleteTagsFromItem($item);
+
                // Set the item to "deleted"
-               // Don't delete it here, since we have to send delete messages
                dba::update('item', ['deleted' => true, 'title' => '', 'body' => '',
-                                       'edited' => datetime_convert(), 'changed' => datetime_convert()],
+                                       'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()],
                                ['id' => $item['id']]);
 
-               create_tags_from_item($item['id']);
-               Term::createFromItem($item['id']);
-               delete_thread($item['id'], $item['parent-uri']);
+               Term::insertFromTagFieldByItemId($item['id']);
+               Term::insertFromFileFieldByItemId($item['id']);
+               self::deleteThread($item['id'], $item['parent-uri']);
 
-               // Creating list of parents
-               $r = q("SELECT `id` FROM `item` WHERE `parent` = %d AND `uid` = %d",
-                       intval($item['id']),
-                       intval($item['uid'])
-               );
+               // If it's the parent of a comment thread, kill all the kids
+               if ($item['id'] == $item['parent']) {
+                       self::delete(['parent' => $item['parent']], $priority);
+               }
+
+               // send the notification upstream/downstream
+               if ($item['origin'] || $parent['origin']) {
+                       Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
+               }
+
+               return true;
+       }
+
+       private static function deleteTagsFromItem($item)
+       {
+               if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
+                       return;
+               }
+
+               $xo = XML::parseString($item["object"], false);
+               $xt = XML::parseString($item["target"], false);
+
+               if ($xt->type != ACTIVITY_OBJ_NOTE) {
+                       return;
+               }
+
+               $i = dba::selectFirst('item', ['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
+               if (!DBM::is_result($i)) {
+                       return;
+               }
+
+               // For tags, the owner cannot remove the tag on the author's copy of the post.
+               $owner_remove = ($item["contact-id"] == $i["contact-id"]);
+               $author_copy = $item["origin"];
+
+               if (($owner_remove && $author_copy) || !$owner_remove) {
+                       return;
+               }
+
+               $tags = explode(',', $i["tag"]);
+               $newtags = [];
+               if (count($tags)) {
+                       foreach ($tags as $tag) {
+                               if (trim($tag) !== trim($xo->body)) {
+                                      $newtags[] = trim($tag);
+                               }
+                       }
+               }
+               self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
+       }
+
+       private static function guid($item, $notify)
+       {
+               $guid = notags(trim($item['guid']));
+
+               if (!empty($guid)) {
+                       return $guid;
+               }
+
+               if ($notify) {
+                       // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
+                       // We add the hash of our own host because our host is the original creator of the post.
+                       $prefix_host = get_app()->get_hostname();
+               } else {
+                       $prefix_host = '';
+
+                       // We are only storing the post so we create a GUID from the original hostname.
+                       if (!empty($item['author-link'])) {
+                               $parsed = parse_url($item['author-link']);
+                               if (!empty($parsed['host'])) {
+                                       $prefix_host = $parsed['host'];
+                               }
+                       }
+
+                       if (empty($prefix_host) && !empty($item['plink'])) {
+                               $parsed = parse_url($item['plink']);
+                               if (!empty($parsed['host'])) {
+                                       $prefix_host = $parsed['host'];
+                               }
+                       }
 
-               $parentid = "";
+                       if (empty($prefix_host) && !empty($item['uri'])) {
+                               $parsed = parse_url($item['uri']);
+                               if (!empty($parsed['host'])) {
+                                       $prefix_host = $parsed['host'];
+                               }
+                       }
 
-               foreach ($r as $row) {
-                       if ($parentid != "") {
-                               $parentid .= ", ";
+                       // Is it in the format data@host.tld? - Used for mail contacts
+                       if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
+                               $mailparts = explode('@', $item['author-link']);
+                               $prefix_host = array_pop($mailparts);
                        }
+               }
+
+               if (!empty($item['plink'])) {
+                       $guid = self::guidFromUri($item['plink'], $prefix_host);
+               } elseif (!empty($item['uri'])) {
+                       $guid = self::guidFromUri($item['uri'], $prefix_host);
+               } else {
+                       $guid = get_guid(32, hash('crc32', $prefix_host));
+               }
 
-                       $parentid .= $row["id"];
+               return $guid;
+       }
+
+       private static function contactId($item)
+       {
+               $contact_id = (int)$item["contact-id"];
+
+               if (!empty($contact_id)) {
+                       return $contact_id;
+               }
+               logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
+               /*
+                * First we are looking for a suitable contact that matches with the author of the post
+                * This is done only for comments
+                */
+               if ($item['parent-uri'] != $item['uri']) {
+                       $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
                }
 
-               // Now delete them
-               if ($parentid != "") {
-                       q("DELETE FROM `sign` WHERE `iid` IN (%s)", dbesc($parentid));
+               // If not present then maybe the owner was found
+               if ($contact_id == 0) {
+                       $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
                }
 
-               // If it's the parent of a comment thread, kill all the kids
-               if ($item['uri'] == $item['parent-uri']) {
-                       dba::update('item', ['deleted' => true, 'title' => '', 'body' => '',
-                                       'edited' => datetime_convert(), 'changed' => datetime_convert()],
-                               ['parent-uri' => $item['parent-uri'], 'uid' => $item['uid']]);
-
-                       create_tags_from_itemuri($item['parent-uri'], $item['uid']);
-                       Term::createFromItemURI($item['parent-uri'], $item['uid']);
-                       delete_thread_uri($item['parent-uri'], $item['uid']);
-                       // ignore the result
+               // Still missing? Then use the "self" contact of the current user
+               if ($contact_id == 0) {
+                       $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
+                       if (DBM::is_result($self)) {
+                               $contact_id = $self["id"];
+                       }
+               }
+               logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
+
+               return $contact_id;
+       }
+
+       public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
+       {
+               $a = get_app();
+
+               // If it is a posting where users should get notifications, then define it as wall posting
+               if ($notify) {
+                       $item['wall'] = 1;
+                       $item['type'] = 'wall';
+                       $item['origin'] = 1;
+                       $item['network'] = NETWORK_DFRN;
+                       $item['protocol'] = PROTOCOL_DFRN;
                } else {
-                       // ensure that last-child is set in case the comment that had it just got wiped.
-                       dba::update('item', ['last-child' => false, 'changed' => datetime_convert()],
-                                       ['parent-uri' => $item['parent-uri'], 'uid' => $item['uid']]);
+                       $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
+               }
+
+               $item['guid'] = self::guid($item, $notify);
+               $item['uri'] = notags(trim(defaults($item, 'uri', item_new_uri($a->get_hostname(), $item['uid'], $item['guid']))));
+
+               // Store conversation data
+               $item = Conversation::insert($item);
 
-                       // who is the last child now?
-                       $r = q("SELECT `id` FROM `item` WHERE `parent-uri` = '%s' AND `type` != 'activity' AND `deleted` = 0 AND `uid` = %d ORDER BY `edited` DESC LIMIT 1",
-                               dbesc($item['parent-uri']),
-                               intval($item['uid'])
-                       );
-                       if (DBM::is_result($r)) {
-                               dba::update('item', ['last-child' => true], ['id' => $r[0]['id']]);
+               /*
+                * If a Diaspora signature structure was passed in, pull it out of the
+                * item array and set it aside for later storage.
+                */
+
+               $dsprsig = null;
+               if (x($item, 'dsprsig')) {
+                       $encoded_signature = $item['dsprsig'];
+                       $dsprsig = json_decode(base64_decode($item['dsprsig']));
+                       unset($item['dsprsig']);
+               }
+
+               // Converting the plink
+               /// @TODO Check if this is really still needed
+               if ($item['network'] == NETWORK_OSTATUS) {
+                       if (isset($item['plink'])) {
+                               $item['plink'] = OStatus::convertHref($item['plink']);
+                       } elseif (isset($item['uri'])) {
+                               $item['plink'] = OStatus::convertHref($item['uri']);
                        }
                }
 
-               // send the notification upstream/downstream
-               Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
+               if (!empty($item['thr-parent'])) {
+                       $item['parent-uri'] = $item['thr-parent'];
+               }
 
-               return true;
-*/
+               if (x($item, 'gravity')) {
+                       $item['gravity'] = intval($item['gravity']);
+               } elseif ($item['parent-uri'] === $item['uri']) {
+                       $item['gravity'] = 0;
+               } elseif (activity_match($item['verb'],ACTIVITY_POST)) {
+                       $item['gravity'] = 6;
+               } else {
+                       $item['gravity'] = 6;   // extensible catchall
+               }
+
+               $item['type'] = defaults($item, 'type', 'remote');
+
+               $uid = intval($item['uid']);
+
+               // check for create date and expire time
+               $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
+
+               $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
+               if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
+                       $expire_interval = $user['expire'];
+               }
+
+               if (($expire_interval > 0) && !empty($item['created'])) {
+                       $expire_date = time() - ($expire_interval * 86400);
+                       $created_date = strtotime($item['created']);
+                       if ($created_date < $expire_date) {
+                               logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
+                               return 0;
+                       }
+               }
+
+               /*
+                * Do we already have this item?
+                * We have to check several networks since Friendica posts could be repeated
+                * via OStatus (maybe Diasporsa as well)
+                */
+               if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
+                       $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
+                               trim($item['uri']), $item['uid'],
+                               NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
+                       $existing = dba::selectFirst('item', ['id', 'network'], $condition);
+                       if (DBM::is_result($existing)) {
+                               // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
+                               if ($uid != 0) {
+                                       logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
+                               }
+
+                               return $existing["id"];
+                       }
+               }
+
+               self::addLanguageInPostopts($item);
+
+               $item['wall']          = intval(defaults($item, 'wall', 0));
+               $item['extid']         = trim(defaults($item, 'extid', ''));
+               $item['author-name']   = trim(defaults($item, 'author-name', ''));
+               $item['author-link']   = trim(defaults($item, 'author-link', ''));
+               $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
+               $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
+               $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
+               $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
+               $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
+               $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
+               $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
+               $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
+               $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
+               $item['title']         = trim(defaults($item, 'title', ''));
+               $item['location']      = trim(defaults($item, 'location', ''));
+               $item['coord']         = trim(defaults($item, 'coord', ''));
+               $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
+               $item['deleted']       = 0;
+               $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
+               $item['verb']          = trim(defaults($item, 'verb', ''));
+               $item['object-type']   = trim(defaults($item, 'object-type', ''));
+               $item['object']        = trim(defaults($item, 'object', ''));
+               $item['target-type']   = trim(defaults($item, 'target-type', ''));
+               $item['target']        = trim(defaults($item, 'target', ''));
+               $item['plink']         = trim(defaults($item, 'plink', ''));
+               $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
+               $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
+               $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
+               $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
+               $item['private']       = intval(defaults($item, 'private', 0));
+               $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
+               $item['body']          = trim(defaults($item, 'body', ''));
+               $item['tag']           = trim(defaults($item, 'tag', ''));
+               $item['attach']        = trim(defaults($item, 'attach', ''));
+               $item['app']           = trim(defaults($item, 'app', ''));
+               $item['origin']        = intval(defaults($item, 'origin', 0));
+               $item['postopts']      = trim(defaults($item, 'postopts', ''));
+               $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
+               $item['event-id']      = intval(defaults($item, 'event-id', 0));
+               $item['inform']        = trim(defaults($item, 'inform', ''));
+               $item['file']          = trim(defaults($item, 'file', ''));
+
+               // When there is no content then we don't post it
+               if ($item['body'].$item['title'] == '') {
+                       return 0;
+               }
+
+               // Items cannot be stored before they happen ...
+               if ($item['created'] > DateTimeFormat::utcNow()) {
+                       $item['created'] = DateTimeFormat::utcNow();
+               }
+
+               // We haven't invented time travel by now.
+               if ($item['edited'] > DateTimeFormat::utcNow()) {
+                       $item['edited'] = DateTimeFormat::utcNow();
+               }
+
+               if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
+                       logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
+               }
+
+               $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
+
+               // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
+               $item["contact-id"] = self::contactId($item);
+
+               $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"]));
+
+               if (Contact::isBlocked($item["author-id"])) {
+                       logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
+                       return 0;
+               }
+
+               $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"]));
+
+               if (Contact::isBlocked($item["owner-id"])) {
+                       logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
+                       return 0;
+               }
+
+               if ($item['network'] == NETWORK_PHANTOM) {
+                       logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
+
+                       $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
+                       if (!empty($contact['network'])) {
+                               $item['network'] = $contact["network"];
+                       } else {
+                               $item['network'] = NETWORK_DFRN;
+                       }
+                       logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
+               }
+
+               // Checking if there is already an item with the same guid
+               logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
+               $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
+               if (dba::exists('item', $condition)) {
+                       logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
+                       return 0;
+               }
+
+               // Check for hashtags in the body and repair or add hashtag links
+               self::setHashtags($item);
+
+               $item['thr-parent'] = $item['parent-uri'];
+
+               $notify_type = '';
+               $allow_cid = '';
+               $allow_gid = '';
+               $deny_cid  = '';
+               $deny_gid  = '';
+
+               if ($item['parent-uri'] === $item['uri']) {
+                       $parent_id = 0;
+                       $parent_deleted = 0;
+                       $allow_cid = $item['allow_cid'];
+                       $allow_gid = $item['allow_gid'];
+                       $deny_cid  = $item['deny_cid'];
+                       $deny_gid  = $item['deny_gid'];
+                       $notify_type = 'wall-new';
+               } else {
+                       // find the parent and snarf the item id and ACLs
+                       // and anything else we need to inherit
+
+                       $fields = ['uri', 'parent-uri', 'id', 'deleted',
+                               'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
+                               'wall', 'private', 'forum_mode'];
+                       $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
+                       $params = ['order' => ['id' => false]];
+                       $parent = dba::selectFirst('item', $fields, $condition, $params);
+
+                       if (DBM::is_result($parent)) {
+                               // is the new message multi-level threaded?
+                               // even though we don't support it now, preserve the info
+                               // and re-attach to the conversation parent.
+
+                               if ($parent['uri'] != $parent['parent-uri']) {
+                                       $item['parent-uri'] = $parent['parent-uri'];
+
+                                       $condition = ['uri' => $item['parent-uri'],
+                                               'parent-uri' => $item['parent-uri'],
+                                               'uid' => $item['uid']];
+                                       $params = ['order' => ['id' => false]];
+                                       $toplevel_parent = dba::selectFirst('item', $fields, $condition, $params);
+
+                                       if (DBM::is_result($toplevel_parent)) {
+                                               $parent = $toplevel_parent;
+                                       }
+                               }
+
+                               $parent_id      = $parent['id'];
+                               $parent_deleted = $parent['deleted'];
+                               $allow_cid      = $parent['allow_cid'];
+                               $allow_gid      = $parent['allow_gid'];
+                               $deny_cid       = $parent['deny_cid'];
+                               $deny_gid       = $parent['deny_gid'];
+                               $item['wall']    = $parent['wall'];
+                               $notify_type    = 'comment-new';
+
+                               /*
+                                * If the parent is private, force privacy for the entire conversation
+                                * This differs from the above settings as it subtly allows comments from
+                                * email correspondents to be private even if the overall thread is not.
+                                */
+                               if ($parent['private']) {
+                                       $item['private'] = $parent['private'];
+                               }
+
+                               /*
+                                * Edge case. We host a public forum that was originally posted to privately.
+                                * The original author commented, but as this is a comment, the permissions
+                                * weren't fixed up so it will still show the comment as private unless we fix it here.
+                                */
+                               if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
+                                       $item['private'] = 0;
+                               }
+
+                               // If its a post from myself then tag the thread as "mention"
+                               logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
+                               $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
+                               if (DBM::is_result($user)) {
+                                       $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
+                                       logger("'myself' is ".$self." for parent ".$parent_id." checking against ".$item['author-link']." and ".$item['owner-link'], LOGGER_DEBUG);
+                                       if ((normalise_link($item['author-link']) == $self) || (normalise_link($item['owner-link']) == $self)) {
+                                               dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
+                                               logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
+                                       }
+                               }
+                       } else {
+                               /*
+                                * Allow one to see reply tweets from status.net even when
+                                * we don't have or can't see the original post.
+                                */
+                               if ($force_parent) {
+                                       logger('$force_parent=true, reply converted to top-level post.');
+                                       $parent_id = 0;
+                                       $item['parent-uri'] = $item['uri'];
+                                       $item['gravity'] = 0;
+                               } else {
+                                       logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
+                                       return 0;
+                               }
+
+                               $parent_deleted = 0;
+                       }
+               }
+
+               $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
+                       $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
+               if (dba::exists('item', $condition)) {
+                       logger('duplicated item with the same uri found. '.print_r($item,true));
+                       return 0;
+               }
+
+               // On Friendica and Diaspora the GUID is unique
+               if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
+                       $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
+                       if (dba::exists('item', $condition)) {
+                               logger('duplicated item with the same guid found. '.print_r($item,true));
+                               return 0;
+                       }
+               } else {
+                       // Check for an existing post with the same content. There seems to be a problem with OStatus.
+                       $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
+                                       $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
+                       if (dba::exists('item', $condition)) {
+                               logger('duplicated item with the same body found. '.print_r($item,true));
+                               return 0;
+                       }
+               }
+
+               // Is this item available in the global items (with uid=0)?
+               if ($item["uid"] == 0) {
+                       $item["global"] = true;
+
+                       // Set the global flag on all items if this was a global item entry
+                       dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
+               } else {
+                       $item["global"] = dba::exists('item', ['uid' => 0, 'uri' => $item["uri"]]);
+               }
+
+               // ACL settings
+               if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
+                       $private = 1;
+               } else {
+                       $private = $item['private'];
+               }
+
+               $item["allow_cid"] = $allow_cid;
+               $item["allow_gid"] = $allow_gid;
+               $item["deny_cid"] = $deny_cid;
+               $item["deny_gid"] = $deny_gid;
+               $item["private"] = $private;
+               $item["deleted"] = $parent_deleted;
+
+               // Fill the cache field
+               put_item_in_cache($item);
+
+               if ($notify) {
+                       Addon::callHooks('post_local', $item);
+               } else {
+                       Addon::callHooks('post_remote', $item);
+               }
+
+               // This array field is used to trigger some automatic reactions
+               // It is mainly used in the "post_local" hook.
+               unset($item['api_source']);
+
+               if (x($item, 'cancel')) {
+                       logger('post cancelled by addon.');
+                       return 0;
+               }
+
+               /*
+                * Check for already added items.
+                * There is a timing issue here that sometimes creates double postings.
+                * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
+                */
+               if ($item["uid"] == 0) {
+                       if (dba::exists('item', ['uri' => trim($item['uri']), 'uid' => 0])) {
+                               logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
+                               return 0;
+                       }
+               }
+
+               logger('' . print_r($item,true), LOGGER_DATA);
+
+               dba::transaction();
+               $ret = dba::insert('item', $item);
+
+               // When the item was successfully stored we fetch the ID of the item.
+               if (DBM::is_result($ret)) {
+                       $current_post = dba::lastInsertId();
+               } else {
+                       // This can happen - for example - if there are locking timeouts.
+                       dba::rollback();
+
+                       // Store the data into a spool file so that we can try again later.
+
+                       // At first we restore the Diaspora signature that we removed above.
+                       if (isset($encoded_signature)) {
+                               $item['dsprsig'] = $encoded_signature;
+                       }
+
+                       // Now we store the data in the spool directory
+                       // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
+                       $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
+
+                       $spoolpath = get_spoolpath();
+                       if ($spoolpath != "") {
+                               $spool = $spoolpath.'/'.$file;
+                               file_put_contents($spool, json_encode($item));
+                               logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
+                       }
+                       return 0;
+               }
+
+               if ($current_post == 0) {
+                       // This is one of these error messages that never should occur.
+                       logger("couldn't find created item - we better quit now.");
+                       dba::rollback();
+                       return 0;
+               }
+
+               // How much entries have we created?
+               // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
+               $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
+
+               if ($entries > 1) {
+                       // There are duplicates. We delete our just created entry.
+                       logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
+
+                       // Yes, we could do a rollback here - but we are having many users with MyISAM.
+                       dba::delete('item', ['id' => $current_post]);
+                       dba::commit();
+                       return 0;
+               } elseif ($entries == 0) {
+                       // This really should never happen since we quit earlier if there were problems.
+                       logger("Something is terribly wrong. We haven't found our created entry.");
+                       dba::rollback();
+                       return 0;
+               }
+
+               logger('created item '.$current_post);
+               self::updateContact($item);
+
+               if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
+                       $parent_id = $current_post;
+               }
+
+               // Set parent id
+               dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
+
+               $item['id'] = $current_post;
+               $item['parent'] = $parent_id;
+
+               // update the commented timestamp on the parent
+               // Only update "commented" if it is really a comment
+               if (($item['verb'] == ACTIVITY_POST) || !Config::get("system", "like_no_comment")) {
+                       dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
+               } else {
+                       dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
+               }
+
+               if ($dsprsig) {
+                       /*
+                        * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
+                        * We can check for this condition when we decode and encode the stuff again.
+                        */
+                       if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
+                               $dsprsig->signature = base64_decode($dsprsig->signature);
+                               logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
+                       }
+
+                       dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
+                                               'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
+               }
+
+               $deleted = self::tagDeliver($item['uid'], $current_post);
+
+               /*
+                * current post can be deleted if is for a community page and no mention are
+                * in it.
+                */
+               if (!$deleted && !$dontcache) {
+                       $posted_item = dba::selectFirst('item', [], ['id' => $current_post]);
+                       if (DBM::is_result($posted_item)) {
+                               if ($notify) {
+                                       Addon::callHooks('post_local_end', $posted_item);
+                               } else {
+                                       Addon::callHooks('post_remote_end', $posted_item);
+                               }
+                       } else {
+                               logger('new item not found in DB, id ' . $current_post);
+                       }
+               }
+
+               if ($item['parent-uri'] === $item['uri']) {
+                       self::addThread($current_post);
+               } else {
+                       self::updateThread($parent_id);
+               }
+
+               dba::commit();
+
+               /*
+                * Due to deadlock issues with the "term" table we are doing these steps after the commit.
+                * This is not perfect - but a workable solution until we found the reason for the problem.
+                */
+               Term::insertFromTagFieldByItemId($current_post);
+               Term::insertFromFileFieldByItemId($current_post);
+
+               if ($item['parent-uri'] === $item['uri']) {
+                       self::addShadow($current_post);
+               } else {
+                       self::addShadowPost($current_post);
+               }
+
+               check_user_notification($current_post);
+
+               if ($notify) {
+                       Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
+               }
+
+               return $current_post;
        }
 
        /**
@@ -220,11 +872,6 @@ class Item
                        return;
                }
 
-               // Is the public contact configured as hidden?
-               if (Contact::isHidden($item["owner-id"]) || Contact::isHidden($item["author-id"])) {
-                       return;
-               }
-
                // Only do these checks if the post isn't a wall post
                if (!$item["wall"]) {
                        // Check, if hide-friends is activated - then don't do a shadow entry
@@ -254,7 +901,11 @@ class Item
                                $item['uid'] = 0;
                                $item['origin'] = 0;
                                $item['wall'] = 0;
-                               $item['contact-id'] = Contact::getIdForURL($item['author-link'], 0);
+                               if ($item['uri'] == $item['parent-uri']) {
+                                       $item['contact-id'] = Contact::getIdForURL($item['owner-link']);
+                               } else {
+                                       $item['contact-id'] = Contact::getIdForURL($item['author-link']);
+                               }
 
                                if (in_array($item['type'], ["net-comment", "wall-comment"])) {
                                        $item['type'] = 'remote-comment';
@@ -262,7 +913,7 @@ class Item
                                        $item['type'] = 'remote';
                                }
 
-                               $public_shadow = item_store($item, false, false, true);
+                               $public_shadow = self::insert($item, false, false, true);
 
                                logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
                        }
@@ -308,7 +959,7 @@ class Item
                $item['uid'] = 0;
                $item['origin'] = 0;
                $item['wall'] = 0;
-               $item['contact-id'] = Contact::getIdForURL($item['author-link'], 0);
+               $item['contact-id'] = Contact::getIdForURL($item['author-link']);
 
                if (in_array($item['type'], ["net-comment", "wall-comment"])) {
                        $item['type'] = 'remote-comment';
@@ -316,8 +967,988 @@ class Item
                        $item['type'] = 'remote';
                }
 
-               $public_shadow = item_store($item, false, false, true);
+               $public_shadow = self::insert($item, false, false, true);
 
                logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
        }
+
+        /**
+        * Adds a "lang" specification in a "postopts" element of given $arr,
+        * if possible and not already present.
+        * Expects "body" element to exist in $arr.
+        */
+       private static function addLanguageInPostopts(&$arr)
+       {
+               if (x($arr, 'postopts')) {
+                       if (strstr($arr['postopts'], 'lang=')) {
+                               // do not override
+                               return;
+                       }
+                       $postopts = $arr['postopts'];
+               } else {
+                       $postopts = "";
+               }
+
+               $naked_body = preg_replace('/\[(.+?)\]/','', $arr['body']);
+               $l = new Text_LanguageDetect();
+               $lng = $l->detect($naked_body, 3);
+
+               if (sizeof($lng) > 0) {
+                       if ($postopts != "") {
+                               $postopts .= '&'; // arbitrary separator, to be reviewed
+                       }
+
+                       $postopts .= 'lang=';
+                       $sep = "";
+
+                       foreach ($lng as $language => $score) {
+                               $postopts .= $sep . $language . ";" . $score;
+                               $sep = ':';
+                       }
+                       $arr['postopts'] = $postopts;
+               }
+       }
+
+       /**
+        * @brief Creates an unique guid out of a given uri
+        *
+        * @param string $uri uri of an item entry
+        * @param string $host hostname for the GUID prefix
+        * @return string unique guid
+        */
+       public static function guidFromUri($uri, $host)
+       {
+               // Our regular guid routine is using this kind of prefix as well
+               // We have to avoid that different routines could accidentally create the same value
+               $parsed = parse_url($uri);
+
+               // We use a hash of the hostname as prefix for the guid
+               $guid_prefix = hash("crc32", $host);
+
+               // Remove the scheme to make sure that "https" and "http" doesn't make a difference
+               unset($parsed["scheme"]);
+
+               // Glue it together to be able to make a hash from it
+               $host_id = implode("/", $parsed);
+
+               // We could use any hash algorithm since it isn't a security issue
+               $host_hash = hash("ripemd128", $host_id);
+
+               return $guid_prefix.$host_hash;
+       }
+
+       /**
+        * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
+        *
+        * This can be used to filter for inactive contacts.
+        * Only do this for public postings to avoid privacy problems, since poco data is public.
+        * Don't set this value if it isn't from the owner (could be an author that we don't know)
+        *
+        * @param array $arr Contains the just posted item record
+        */
+       private static function updateContact($arr)
+       {
+               // Unarchive the author
+               $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
+               if (DBM::is_result($contact)) {
+                       Contact::unmarkForArchival($contact);
+               }
+
+               // Unarchive the contact if it's not our own contact
+               $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
+               if (DBM::is_result($contact)) {
+                       Contact::unmarkForArchival($contact);
+               }
+
+               $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
+
+               // Is it a forum? Then we don't care about the rules from above
+               if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
+                       if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
+                               $update = true;
+                       }
+               }
+
+               if ($update) {
+                       dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
+                               ['id' => $arr['contact-id']]);
+               }
+               // Now do the same for the system wide contacts with uid=0
+               if (!$arr['private']) {
+                       dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
+                               ['id' => $arr['owner-id']]);
+
+                       if ($arr['owner-id'] != $arr['author-id']) {
+                               dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
+                                       ['id' => $arr['author-id']]);
+                       }
+               }
+       }
+
+       private static function setHashtags(&$item)
+       {
+
+               $tags = get_tags($item["body"]);
+
+               // No hashtags?
+               if (!count($tags)) {
+                       return false;
+               }
+
+               // This sorting is important when there are hashtags that are part of other hashtags
+               // Otherwise there could be problems with hashtags like #test and #test2
+               rsort($tags);
+
+               $URLSearchString = "^\[\]";
+
+               // All hashtags should point to the home server if "local_tags" is activated
+               if (Config::get('system', 'local_tags')) {
+                       $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
+                                       "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
+
+                       $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
+                                       "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
+               }
+
+               // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
+               $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
+                       function ($match) {
+                               return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
+                       }, $item["body"]);
+
+               $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
+                       function ($match) {
+                               return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
+                       }, $item["body"]);
+
+               $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
+                       function ($match) {
+                               return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
+                       }, $item["body"]);
+
+               // Repair recursive urls
+               $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
+                               "&num;$2", $item["body"]);
+
+               foreach ($tags as $tag) {
+                       if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
+                               continue;
+                       }
+
+                       $basetag = str_replace('_',' ',substr($tag,1));
+
+                       $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
+
+                       $item["body"] = str_replace($tag, $newtag, $item["body"]);
+
+                       if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
+                               if (strlen($item["tag"])) {
+                                       $item["tag"] = ','.$item["tag"];
+                               }
+                               $item["tag"] = $newtag.$item["tag"];
+                       }
+               }
+
+               // Convert back the masked hashtags
+               $item["body"] = str_replace("&num;", "#", $item["body"]);
+       }
+
+       public static function getGuidById($id)
+       {
+               $item = dba::selectFirst('item', ['guid'], ['id' => $id]);
+               if (DBM::is_result($item)) {
+                       return $item['guid'];
+               } else {
+                       return '';
+               }
+       }
+
+       public static function getIdAndNickByGuid($guid, $uid = 0)
+       {
+               $nick = "";
+               $id = 0;
+
+               if ($uid == 0) {
+                       $uid == local_user();
+               }
+
+               // Does the given user have this item?
+               if ($uid) {
+                       $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
+                               INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
+                               WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
+                                       AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
+                       if (DBM::is_result($item)) {
+                               $id = $item["id"];
+                               $nick = $item["nickname"];
+                       }
+               }
+
+               // Or is it anywhere on the server?
+               if ($nick == "") {
+                       $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
+                               INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
+                               WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
+                                       AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
+                                       AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
+                                       AND NOT `item`.`private` AND `item`.`wall`
+                                       AND `item`.`guid` = ?", $guid);
+                       if (DBM::is_result($item)) {
+                               $id = $item["id"];
+                               $nick = $item["nickname"];
+                       }
+               }
+               return ["nick" => $nick, "id" => $id];
+       }
+
+       /**
+        * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
+        * @param int $uid
+        * @param int $item_id
+        * @return bool true if item was deleted, else false
+        */
+       private static function tagDeliver($uid, $item_id)
+       {
+               $mention = false;
+
+               $user = dba::selectFirst('user', [], ['uid' => $uid]);
+               if (!DBM::is_result($user)) {
+                       return;
+               }
+
+               $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
+               $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
+
+               $item = dba::selectFirst('item', [], ['id' => $item_id]);
+               if (!DBM::is_result($item)) {
+                       return;
+               }
+
+               $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
+
+               /*
+                * Diaspora uses their own hardwired link URL in @-tags
+                * instead of the one we supply with webfinger
+                */
+               $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
+
+               $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
+               if ($cnt) {
+                       foreach ($matches as $mtch) {
+                               if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
+                                       $mention = true;
+                                       logger('mention found: ' . $mtch[2]);
+                               }
+                       }
+               }
+
+               if (!$mention) {
+                       if (($community_page || $prvgroup) &&
+                                 !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
+                               // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
+                               // delete it!
+                               logger("no-mention top-level post to community or private group. delete.");
+                               dba::delete('item', ['id' => $item_id]);
+                               return true;
+                       }
+                       return;
+               }
+
+               $arr = ['item' => $item, 'user' => $user];
+
+               Addon::callHooks('tagged', $arr);
+
+               if (!$community_page && !$prvgroup) {
+                       return;
+               }
+
+               /*
+                * tgroup delivery - setup a second delivery chain
+                * prevent delivery looping - only proceed
+                * if the message originated elsewhere and is a top-level post
+                */
+               if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
+                       return;
+               }
+
+               // now change this copy of the post to a forum head message and deliver to all the tgroup members
+               $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
+               if (!DBM::is_result($self)) {
+                       return;
+               }
+
+               $owner_id = Contact::getIdForURL($self['url']);
+
+               // also reset all the privacy bits to the forum default permissions
+
+               $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
+
+               $forum_mode = ($prvgroup ? 2 : 1);
+
+               $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
+                       'owner-id' => $owner_id, 'owner-name' => $self['name'], 'owner-link' => $self['url'],
+                       'owner-avatar' => $self['thumb'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
+                       'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
+               dba::update('item', $fields, ['id' => $item_id]);
+
+               self::updateThread($item_id);
+
+               Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
+       }
+
+       public static function isRemoteSelf($contact, &$datarray)
+       {
+               $a = get_app();
+
+               if (!$contact['remote_self']) {
+                       return false;
+               }
+
+               // Prevent the forwarding of posts that are forwarded
+               if ($datarray["extid"] == NETWORK_DFRN) {
+                       return false;
+               }
+
+               // Prevent to forward already forwarded posts
+               if ($datarray["app"] == $a->get_hostname()) {
+                       return false;
+               }
+
+               // Only forward posts
+               if ($datarray["verb"] != ACTIVITY_POST) {
+                       return false;
+               }
+
+               if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
+                       return false;
+               }
+
+               $datarray2 = $datarray;
+               logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
+               if ($contact['remote_self'] == 2) {
+                       $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
+                                       ['uid' => $contact['uid'], 'self' => true]);
+                       if (DBM::is_result($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['created']);
+                               unset($datarray['edited']);
+                       }
+
+                       if ($contact['network'] != NETWORK_FEED) {
+                               $datarray["guid"] = get_guid(32);
+                               unset($datarray["plink"]);
+                               $datarray["uri"] = item_new_uri($a->get_hostname(), $contact['uid'], $datarray["guid"]);
+                               $datarray["parent-uri"] = $datarray["uri"];
+                               $datarray["extid"] = $contact['network'];
+                               $urlpart = parse_url($datarray2['author-link']);
+                               $datarray["app"] = $urlpart["host"];
+                       } else {
+                               $datarray['private'] = 0;
+                       }
+               }
+
+               if ($contact['network'] != NETWORK_FEED) {
+                       // Store the original post
+                       $r = self::insert($datarray2, false, false);
+                       logger('remote-self post original item - Contact '.$contact['url'].' return '.$r.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
+               } else {
+                       $datarray["app"] = "Feed";
+               }
+
+               // Trigger automatic reactions for addons
+               $datarray['api_source'] = true;
+
+               // We have to tell the hooks who we are - this really should be improved
+               $_SESSION["authenticated"] = true;
+               $_SESSION["uid"] = $contact['uid'];
+
+               return true;
+       }
+
+       /**
+        *
+        * @param string $s
+        * @param int    $uid
+        * @param array  $item
+        * @param int    $cid
+        * @return string
+        */
+       public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
+       {
+               if (Config::get('system', 'disable_embedded')) {
+                       return $s;
+               }
+
+               logger('check for photos', LOGGER_DEBUG);
+               $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
+
+               $orig_body = $s;
+               $new_body = '';
+
+               $img_start = strpos($orig_body, '[img');
+               $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
+               $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
+
+               while (($img_st_close !== false) && ($img_len !== false)) {
+                       $img_st_close++; // make it point to AFTER the closing bracket
+                       $image = substr($orig_body, $img_start + $img_st_close, $img_len);
+
+                       logger('found photo ' . $image, LOGGER_DEBUG);
+
+                       if (stristr($image, $site . '/photo/')) {
+                               // Only embed locally hosted photos
+                               $replace = false;
+                               $i = basename($image);
+                               $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
+                               $x = strpos($i, '-');
+
+                               if ($x) {
+                                       $res = substr($i, $x + 1);
+                                       $i = substr($i, 0, $x);
+                                       $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
+                                       $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
+                                       if (DBM::is_result($photo)) {
+                                               /*
+                                                * Check to see if we should replace this photo link with an embedded image
+                                                * 1. No need to do so if the photo is public
+                                                * 2. If there's a contact-id provided, see if they're in the access list
+                                                *    for the photo. If so, embed it.
+                                                * 3. Otherwise, if we have an item, see if the item permissions match the photo
+                                                *    permissions, regardless of order but first check to see if they're an exact
+                                                *    match to save some processing overhead.
+                                                */
+                                               if (self::hasPermissions($photo)) {
+                                                       if ($cid) {
+                                                               $recips = self::enumeratePermissions($photo);
+                                                               if (in_array($cid, $recips)) {
+                                                                       $replace = true;
+                                                               }
+                                                       } elseif ($item) {
+                                                               if (self::samePermissions($item, $photo)) {
+                                                                       $replace = true;
+                                                               }
+                                                       }
+                                               }
+                                               if ($replace) {
+                                                       $data = $photo['data'];
+                                                       $type = $photo['type'];
+
+                                                       // If a custom width and height were specified, apply before embedding
+                                                       if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
+                                                               logger('scaling photo', LOGGER_DEBUG);
+
+                                                               $width = intval($match[1]);
+                                                               $height = intval($match[2]);
+
+                                                               $Image = new Image($data, $type);
+                                                               if ($Image->isValid()) {
+                                                                       $Image->scaleDown(max($width, $height));
+                                                                       $data = $Image->asString();
+                                                                       $type = $Image->getType();
+                                                               }
+                                                       }
+
+                                                       logger('replacing photo', LOGGER_DEBUG);
+                                                       $image = 'data:' . $type . ';base64,' . base64_encode($data);
+                                                       logger('replaced: ' . $image, LOGGER_DATA);
+                                               }
+                                       }
+                               }
+                       }
+
+                       $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
+                       $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
+                       if ($orig_body === false) {
+                               $orig_body = '';
+                       }
+
+                       $img_start = strpos($orig_body, '[img');
+                       $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
+                       $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
+               }
+
+               $new_body = $new_body . $orig_body;
+
+               return $new_body;
+       }
+
+       private static function hasPermissions($obj)
+       {
+               return (
+                       (
+                               x($obj, 'allow_cid')
+                       ) || (
+                               x($obj, 'allow_gid')
+                       ) || (
+                               x($obj, 'deny_cid')
+                       ) || (
+                               x($obj, 'deny_gid')
+                       )
+               );
+       }
+
+       private static function samePermissions($obj1, $obj2)
+       {
+               // first part is easy. Check that these are exactly the same.
+               if (($obj1['allow_cid'] == $obj2['allow_cid'])
+                       && ($obj1['allow_gid'] == $obj2['allow_gid'])
+                       && ($obj1['deny_cid'] == $obj2['deny_cid'])
+                       && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
+                       return true;
+               }
+
+               // This is harder. Parse all the permissions and compare the resulting set.
+               $recipients1 = self::enumeratePermissions($obj1);
+               $recipients2 = self::enumeratePermissions($obj2);
+               sort($recipients1);
+               sort($recipients2);
+
+               /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
+               return ($recipients1 == $recipients2);
+       }
+
+       // returns an array of contact-ids that are allowed to see this object
+       private static function enumeratePermissions($obj)
+       {
+               $allow_people = expand_acl($obj['allow_cid']);
+               $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
+               $deny_people  = expand_acl($obj['deny_cid']);
+               $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
+               $recipients   = array_unique(array_merge($allow_people, $allow_groups));
+               $deny         = array_unique(array_merge($deny_people, $deny_groups));
+               $recipients   = array_diff($recipients, $deny);
+               return $recipients;
+       }
+
+       public static function getFeedTags($item)
+       {
+               $ret = [];
+               $matches = false;
+               $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
+               if ($cnt) {
+                       for ($x = 0; $x < $cnt; $x ++) {
+                               if ($matches[1][$x]) {
+                                       $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
+                               }
+                       }
+               }
+               $matches = false;
+               $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
+               if ($cnt) {
+                       for ($x = 0; $x < $cnt; $x ++) {
+                               if ($matches[1][$x]) {
+                                       $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
+                               }
+                       }
+               }
+               return $ret;
+       }
+
+       public static function expire($uid, $days, $network = "", $force = false)
+       {
+               if (!$uid || ($days < 1)) {
+                       return;
+               }
+
+               /*
+                * $expire_network_only = save your own wall posts
+                * and just expire conversations started by others
+                */
+               $expire_network_only = PConfig::get($uid,'expire', 'network_only');
+               $sql_extra = (intval($expire_network_only) ? " AND wall = 0 " : "");
+
+               if ($network != "") {
+                       $sql_extra .= sprintf(" AND network = '%s' ", dbesc($network));
+
+                       /*
+                        * There is an index "uid_network_received" but not "uid_network_created"
+                        * This avoids the creation of another index just for one purpose.
+                        * And it doesn't really matter wether to look at "received" or "created"
+                        */
+                       $range = "AND `received` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
+               } else {
+                       $range = "AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
+               }
+
+               $r = q("SELECT `file`, `resource-id`, `starred`, `type`, `id` FROM `item`
+                       WHERE `uid` = %d $range
+                       AND `id` = `parent`
+                       $sql_extra
+                       AND `deleted` = 0",
+                       intval($uid),
+                       intval($days)
+               );
+
+               if (!DBM::is_result($r)) {
+                       return;
+               }
+
+               $expire_items = PConfig::get($uid, 'expire', 'items', 1);
+
+               // Forcing expiring of items - but not notes and marked items
+               if ($force) {
+                       $expire_items = true;
+               }
+
+               $expire_notes = PConfig::get($uid, 'expire', 'notes', 1);
+               $expire_starred = PConfig::get($uid, 'expire', 'starred', 1);
+               $expire_photos = PConfig::get($uid, 'expire', 'photos', 0);
+
+               logger('User '.$uid.': expire: # items=' . count($r). "; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
+
+               foreach ($r as $item) {
+
+                       // don't expire filed items
+
+                       if (strpos($item['file'],'[') !== false) {
+                               continue;
+                       }
+
+                       // Only expire posts, not photos and photo comments
+
+                       if ($expire_photos == 0 && strlen($item['resource-id'])) {
+                               continue;
+                       } elseif ($expire_starred == 0 && intval($item['starred'])) {
+                               continue;
+                       } elseif ($expire_notes == 0 && $item['type'] == 'note') {
+                               continue;
+                       } elseif ($expire_items == 0 && $item['type'] != 'note') {
+                               continue;
+                       }
+
+                       self::deleteById($item['id'], PRIORITY_LOW);
+               }
+       }
+
+       public static function firstPostDate($uid, $wall = false)
+       {
+               $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
+               $params = ['order' => ['created' => false]];
+               $thread = dba::selectFirst('thread', ['created'], $condition, $params);
+               if (DBM::is_result($thread)) {
+                       return substr(DateTimeFormat::local($thread['created']), 0, 10);
+               }
+               return false;
+       }
+
+       /**
+        * @brief add/remove activity to an item
+        *
+        * Toggle activities as like,dislike,attend of an item
+        *
+        * @param string $item_id
+        * @param string $verb
+        *              Activity verb. One of
+        *                      like, unlike, dislike, undislike, attendyes, unattendyes,
+        *                      attendno, unattendno, attendmaybe, unattendmaybe
+        * @hook 'post_local_end'
+        *              array $arr
+        *                      'post_id' => ID of posted item
+        */
+       public static function performLike($item_id, $verb)
+       {
+               if (!local_user() && !remote_user()) {
+                       return false;
+               }
+
+               switch ($verb) {
+                       case 'like':
+                       case 'unlike':
+                               $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
+                               $activity = ACTIVITY_LIKE;
+                               break;
+                       case 'dislike':
+                       case 'undislike':
+                               $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
+                               $activity = ACTIVITY_DISLIKE;
+                               break;
+                       case 'attendyes':
+                       case 'unattendyes':
+                               $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
+                               $activity = ACTIVITY_ATTEND;
+                               break;
+                       case 'attendno':
+                       case 'unattendno':
+                               $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
+                               $activity = ACTIVITY_ATTENDNO;
+                               break;
+                       case 'attendmaybe':
+                       case 'unattendmaybe':
+                               $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
+                               $activity = ACTIVITY_ATTENDMAYBE;
+                               break;
+                       default:
+                               logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
+                               return false;
+               }
+
+               // Enable activity toggling instead of on/off
+               $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
+
+               logger('like: verb ' . $verb . ' item ' . $item_id);
+
+               $item = dba::selectFirst('item', [], ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
+               if (!DBM::is_result($item)) {
+                       logger('like: unknown item ' . $item_id);
+                       return false;
+               }
+
+               $uid = $item['uid'];
+               if (($uid == 0) && local_user()) {
+                       $uid = local_user();
+               }
+
+               if (!can_write_wall($uid)) {
+                       logger('like: unable to write on wall ' . $uid);
+                       return false;
+               }
+
+               // Retrieves the local post owner
+               $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
+               if (!DBM::is_result($owner_self_contact)) {
+                       logger('like: unknown owner ' . $uid);
+                       return false;
+               }
+
+               // Retrieve the current logged in user's public contact
+               $author_id = public_contact();
+
+               $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
+               if (!DBM::is_result($author_contact)) {
+                       logger('like: unknown author ' . $author_id);
+                       return false;
+               }
+
+               // Contact-id is the uid-dependant author contact
+               if (local_user() == $uid) {
+                       $item_contact_id = $owner_self_contact['id'];
+                       $item_contact = $owner_self_contact;
+               } else {
+                       $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
+                       $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
+                       if (!DBM::is_result($item_contact)) {
+                               logger('like: unknown item contact ' . $item_contact_id);
+                               return false;
+                       }
+               }
+
+               // Look for an existing verb row
+               // event participation are essentially radio toggles. If you make a subsequent choice,
+               // we need to eradicate your first choice.
+               if ($event_verb_flag) {
+                       $verbs = "'" . dbesc(ACTIVITY_ATTEND) . "', '" . dbesc(ACTIVITY_ATTENDNO) . "', '" . dbesc(ACTIVITY_ATTENDMAYBE) . "'";
+               } else {
+                       $verbs = "'".dbesc($activity)."'";
+               }
+
+               /// @todo This query is expected to be a performance eater due to the "OR" - it has to be changed totally
+               $existing_like = q("SELECT `id`, `guid`, `verb` FROM `item`
+                       WHERE `verb` IN ($verbs)
+                       AND `deleted` = 0
+                       AND `author-id` = %d
+                       AND `uid` = %d
+                       AND (`parent` = '%s' OR `parent-uri` = '%s' OR `thr-parent` = '%s')
+                       LIMIT 1",
+                       intval($author_contact['id']),
+                       intval($item['uid']),
+                       dbesc($item_id), dbesc($item_id), dbesc($item['uri'])
+               );
+
+               // If it exists, mark it as deleted
+               if (DBM::is_result($existing_like)) {
+                       $like_item = $existing_like[0];
+
+                       // Already voted, undo it
+                       $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
+                       dba::update('item', $fields, ['id' => $like_item['id']]);
+
+                       // Clean up the Diaspora signatures for this like
+                       // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
+                       // if it had been enabled in the past
+                       dba::delete('sign', ['iid' => $like_item['id']]);
+
+                       $like_item_id = $like_item['id'];
+                       Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
+
+                       if (!$event_verb_flag || $like_item['verb'] == $activity) {
+                               return true;
+                       }
+               }
+
+               // Verb is "un-something", just trying to delete existing entries
+               if (strpos($verb, 'un') === 0) {
+                       return true;
+               }
+
+               // Else or if event verb different from existing row, create a new item row
+               $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
+               if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
+                       $post_type = L10n::t('event');
+               }
+               $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
+               $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
+               $body = $item['body'];
+
+               $obj = <<< EOT
+
+               <object>
+                       <type>$objtype</type>
+                       <local>1</local>
+                       <id>{$item['uri']}</id>
+                       <link>$link</link>
+                       <title></title>
+                       <content>$body</content>
+               </object>
+EOT;
+
+               $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
+               $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
+               $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
+
+               $new_item = [
+                       'guid'          => get_guid(32),
+                       'uri'           => item_new_uri(self::getApp()->get_hostname(), $item['uid']),
+                       'uid'           => $item['uid'],
+                       'contact-id'    => $item_contact_id,
+                       'type'          => 'activity',
+                       'wall'          => $item['wall'],
+                       'origin'        => 1,
+                       'gravity'       => GRAVITY_LIKE,
+                       'parent'        => $item['id'],
+                       'parent-uri'    => $item['uri'],
+                       'thr-parent'    => $item['uri'],
+                       'owner-id'      => $item['owner-id'],
+                       'owner-name'    => $item['owner-name'],
+                       'owner-link'    => $item['owner-link'],
+                       'owner-avatar'  => $item['owner-avatar'],
+                       'author-id'     => $author_contact['id'],
+                       'author-name'   => $author_contact['name'],
+                       'author-link'   => $author_contact['url'],
+                       'author-avatar' => $author_contact['thumb'],
+                       'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
+                       'verb'          => $activity,
+                       'object-type'   => $objtype,
+                       'object'        => $obj,
+                       'allow_cid'     => $item['allow_cid'],
+                       'allow_gid'     => $item['allow_gid'],
+                       'deny_cid'      => $item['deny_cid'],
+                       'deny_gid'      => $item['deny_gid'],
+                       'visible'       => 1,
+                       'unseen'        => 1,
+               ];
+
+               $new_item_id = self::insert($new_item);
+
+               // If the parent item isn't visible then set it to visible
+               if (!$item['visible']) {
+                       self::update(['visible' => true], ['id' => $item['id']]);
+               }
+
+               // Save the author information for the like in case we need to relay to Diaspora
+               Diaspora::storeLikeSignature($item_contact, $new_item_id);
+
+               $new_item['id'] = $new_item_id;
+
+               Addon::callHooks('post_local_end', $new_item);
+
+               Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
+
+               return true;
+       }
+
+       private static function addThread($itemid, $onlyshadow = false)
+       {
+               $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
+                       'moderated', 'visible', 'spam', 'starred', 'bookmark', 'contact-id',
+                       'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
+               $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
+               $item = dba::selectFirst('item', $fields, $condition);
+
+               if (!DBM::is_result($item)) {
+                       return;
+               }
+
+               $item['iid'] = $itemid;
+
+               if (!$onlyshadow) {
+                       $result = dba::insert('thread', $item);
+
+                       logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
+               }
+       }
+
+       private static function updateThread($itemid, $setmention = false)
+       {
+               $fields = ['uid', 'guid', 'title', 'body', 'created', 'edited', 'commented', 'received', 'changed',
+                       'wall', 'private', 'pubmail', 'moderated', 'visible', 'spam', 'starred', 'bookmark', 'contact-id',
+                       'deleted', 'origin', 'forum_mode', 'network', 'rendered-html', 'rendered-hash'];
+               $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
+
+               $item = dba::selectFirst('item', $fields, $condition);
+               if (!DBM::is_result($item)) {
+                       return;
+               }
+
+               if ($setmention) {
+                       $item["mention"] = 1;
+               }
+
+               $sql = "";
+
+               $fields = [];
+
+               foreach ($item as $field => $data) {
+                       if (!in_array($field, ["guid", "title", "body", "rendered-html", "rendered-hash"])) {
+                               $fields[$field] = $data;
+                       }
+               }
+
+               $result = dba::update('thread', $fields, ['iid' => $itemid]);
+
+               logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result." ".print_r($item, true), LOGGER_DEBUG);
+
+               // Updating a shadow item entry
+               $items = dba::selectFirst('item', ['id'], ['guid' => $item['guid'], 'uid' => 0]);
+
+               if (!DBM::is_result($items)) {
+                       return;
+               }
+
+               $fields = ['title' => $item['title'], 'body' => $item['body'],
+                       'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
+               $result = dba::update('item', $fields, ['id' => $items['id']]);
+
+               logger("Updating public shadow for post ".$items["id"]." - guid ".$item["guid"]." Result: ".print_r($result, true), LOGGER_DEBUG);
+       }
+
+       private static function deleteThread($itemid, $itemuri = "")
+       {
+               $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
+               if (!DBM::is_result($item)) {
+                       logger('No thread found for id '.$itemid, LOGGER_DEBUG);
+                       return;
+               }
+
+               // Using dba::delete at this time could delete the associated item entries
+               $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
+
+               logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
+
+               if ($itemuri != "") {
+                       $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
+                       if (!dba::exists('item', $condition)) {
+                               dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
+                               logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
+                       }
+               }
+       }
 }