]> git.mxchange.org Git - friendica.git/blobdiff - src/Model/Item.php
Signed Diaspora posts should now be stored more reliable
[friendica.git] / src / Model / Item.php
index 0e01ff7b96b5f65fea46e451b1971470f8095464..824e240cc36e54edcf7377889a80878ecfbb35d8 100644 (file)
@@ -6,17 +6,19 @@
 
 namespace Friendica\Model;
 
-use dba;
 use Friendica\BaseObject;
-use Friendica\Content\Text;
+use Friendica\Content\Text\BBCode;
 use Friendica\Core\Addon;
 use Friendica\Core\Config;
-use Friendica\Core\L10n;
 use Friendica\Core\Lock;
 use Friendica\Core\PConfig;
+use Friendica\Core\Protocol;
 use Friendica\Core\System;
 use Friendica\Core\Worker;
-use Friendica\Database\DBM;
+use Friendica\Database\DBA;
+use Friendica\Model\Contact;
+use Friendica\Model\PermissionSet;
+use Friendica\Model\ItemURI;
 use Friendica\Object\Image;
 use Friendica\Protocol\Diaspora;
 use Friendica\Protocol\OStatus;
@@ -30,6 +32,17 @@ require_once 'include/text.php';
 
 class Item extends BaseObject
 {
+       // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
+       const PT_ARTICLE = 0;
+       const PT_NOTE = 1;
+       const PT_PAGE = 2;
+       const PT_IMAGE = 16;
+       const PT_AUDIO = 17;
+       const PT_VIDEO = 18;
+       const PT_DOCUMENT = 19;
+       const PT_EVENT = 32;
+       const PT_PERSONAL_NOTE = 128;
+
        // Field list that is used to display the items
        const DISPLAY_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network',
                        'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
@@ -48,7 +61,7 @@ class Item extends BaseObject
        const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
                        'created', 'edited', 'verb', 'object-type', 'object', 'target',
                        'private', 'title', 'body', 'location', 'coord', 'app',
-                       'attach', 'tag', 'bookmark', 'deleted', 'extid',
+                       'attach', 'tag', 'deleted', 'extid', 'post-type',
                        'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
                        'author-id', 'author-link', 'owner-link', 'contact-uid',
                        'signed_text', 'signature', 'signer', 'network'];
@@ -61,18 +74,21 @@ class Item extends BaseObject
        // Field list for "item-content" table that is not present in the "item" table
        const CONTENT_FIELDLIST = ['language'];
 
+       // Field list for additional delivery data
+       const DELIVERY_DATA_FIELDLIST = ['postopts', 'inform'];
+
        // All fields in the item table
        const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
-                       'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid',
-                       'created', 'edited', 'commented', 'received', 'changed', 'verb',
+                       'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
+                       'uri-hash', 'created', 'edited', 'commented', 'received', 'changed', 'verb',
                        'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
-                       'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
+                       'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
                        'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
                        'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
                        'title', 'content-warning', 'body', 'location', 'coord', 'app',
                        'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
                        'author-id', 'author-link', 'author-name', 'author-avatar',
-                       'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'emailcc'];
+                       'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
 
        // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
        // The item-activity table only stores the index and needs this array to know the matching activity.
@@ -83,7 +99,7 @@ class Item extends BaseObject
        public static function isLegacyMode()
        {
                if (is_null(self::$legacy_mode)) {
-                       self::$legacy_mode = (Config::get("system", "post_update_version") < 1276);
+                       self::$legacy_mode = (Config::get("system", "post_update_version") < 1279);
                }
 
                return self::$legacy_mode;
@@ -95,7 +111,7 @@ class Item extends BaseObject
         * @param string $activity activity string
         * @return integer Activity index
         */
-       private static function activityToIndex($activity)
+       public static function activityToIndex($activity)
        {
                $index = array_search($activity, self::ACTIVITIES);
 
@@ -129,7 +145,7 @@ class Item extends BaseObject
         */
        public static function fetch($stmt)
        {
-               $row = dba::fetch($stmt);
+               $row = DBA::fetch($stmt);
 
                if (is_bool($row)) {
                        return $row;
@@ -160,7 +176,7 @@ class Item extends BaseObject
 
                // We can always comment on posts from these networks
                if (array_key_exists('writable', $row) &&
-                       in_array($row['internal-network'], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS])) {
+                       in_array($row['internal-network'], [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS])) {
                        $row['writable'] = true;
                }
 
@@ -168,7 +184,8 @@ class Item extends BaseObject
 
                // Fetch data from the item-content table whenever there is content there
                if (self::isLegacyMode()) {
-                       foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
+                       $legacy_fields = array_merge(self::DELIVERY_DATA_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
+                       foreach ($legacy_fields as $field) {
                                if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
                                        $row[$field] = $row['internal-item-' . $field];
                                }
@@ -214,12 +231,22 @@ class Item extends BaseObject
                        }
                }
 
+               if (array_key_exists('signed_text', $row) && array_key_exists('interaction', $row) && !is_null($row['interaction'])) {
+                       $row['signed_text'] = $row['interaction'];
+               }
+
+               if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
+                       $row['ignored'] = $row['internal-user-ignored'];
+               }
+
                // Remove internal fields
                unset($row['internal-activity']);
                unset($row['internal-network']);
                unset($row['internal-iid']);
                unset($row['internal-iaid']);
                unset($row['internal-icid']);
+               unset($row['internal-user-ignored']);
+               unset($row['interaction']);
 
                return $row;
        }
@@ -240,7 +267,7 @@ class Item extends BaseObject
                        $data[] = $row;
                }
                if ($do_close) {
-                       dba::close($stmt);
+                       DBA::close($stmt);
                }
                return $data;
        }
@@ -258,10 +285,10 @@ class Item extends BaseObject
                if (is_bool($stmt)) {
                        $retval = $stmt;
                } else {
-                       $retval = (dba::num_rows($stmt) > 0);
+                       $retval = (DBA::numRows($stmt) > 0);
                }
 
-               dba::close($stmt);
+               DBA::close($stmt);
 
                return $retval;
        }
@@ -275,7 +302,7 @@ class Item extends BaseObject
         * @param array  $condition
         * @param array  $params
         * @return bool|array
-        * @see dba::select
+        * @see DBA::select
         */
        public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
        {
@@ -317,7 +344,7 @@ class Item extends BaseObject
         * @param array  $condition
         * @param array  $params
         * @return bool|array
-        * @see dba::select
+        * @see DBA::select
         */
        public static function selectFirst(array $fields = [], array $condition = [], $params = [])
        {
@@ -329,7 +356,7 @@ class Item extends BaseObject
                        return $result;
                } else {
                        $row = self::fetch($result);
-                       dba::close($result);
+                       DBA::close($result);
                        return $row;
                }
        }
@@ -353,11 +380,11 @@ class Item extends BaseObject
                        $usermode = true;
                }
 
-               $fields = self::fieldlist($selected);
+               $fields = self::fieldlist($selected, $usermode);
 
                $select_fields = self::constructSelectFields($fields, $selected);
 
-               $condition_string = dba::buildCondition($condition);
+               $condition_string = DBA::buildCondition($condition);
 
                $condition_string = self::addTablesToFields($condition_string, $fields);
 
@@ -365,13 +392,13 @@ class Item extends BaseObject
                        $condition_string = $condition_string . ' AND ' . self::condition(false);
                }
 
-               $param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
+               $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 
                $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 
                $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 
-               return dba::p($sql, $condition);
+               return DBA::p($sql, $condition);
        }
 
        /**
@@ -404,7 +431,7 @@ class Item extends BaseObject
         * @param array  $condition
         * @param array  $params
         * @return bool|array
-        * @see dba::select
+        * @see DBA::select
         */
        public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
        {
@@ -425,7 +452,7 @@ class Item extends BaseObject
         * @param array  $condition
         * @param array  $params
         * @return bool|array
-        * @see dba::select
+        * @see DBA::select
         */
        public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
        {
@@ -436,7 +463,7 @@ class Item extends BaseObject
                        return $result;
                } else {
                        $row = self::fetch($result);
-                       dba::close($result);
+                       DBA::close($result);
                        return $row;
                }
        }
@@ -460,16 +487,18 @@ class Item extends BaseObject
                        $usermode = true;
                }
 
-               $fields = self::fieldlist($selected);
+               $fields = self::fieldlist($selected, $usermode);
+
+               $fields['thread'] = ['mention', 'ignored', 'iid'];
 
                $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
                        'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
-                       'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
+                       'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
                        'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 
                $select_fields = self::constructSelectFields($fields, $selected);
 
-               $condition_string = dba::buildCondition($condition);
+               $condition_string = DBA::buildCondition($condition);
 
                $condition_string = self::addTablesToFields($condition_string, $threadfields);
                $condition_string = self::addTablesToFields($condition_string, $fields);
@@ -478,7 +507,7 @@ class Item extends BaseObject
                        $condition_string = $condition_string . ' AND ' . self::condition(true);
                }
 
-               $param_string = dba::buildParameter($params);
+               $param_string = DBA::buildParameter($params);
                $param_string = self::addTablesToFields($param_string, $threadfields);
                $param_string = self::addTablesToFields($param_string, $fields);
 
@@ -486,7 +515,7 @@ class Item extends BaseObject
 
                $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 
-               return dba::p($sql, $condition);
+               return DBA::p($sql, $condition);
        }
 
        /**
@@ -494,25 +523,32 @@ class Item extends BaseObject
         *
         * @return array field list
         */
-       private static function fieldlist($selected)
+       private static function fieldlist($selected, $usermode)
        {
                $fields = [];
 
                $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
                        'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
-                       'created', 'edited', 'commented', 'received', 'changed', 'postopts',
-                       'resource-id', 'event-id', 'tag', 'attach', 'inform',
-                       'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
+                       'created', 'edited', 'commented', 'received', 'changed', 'psid', 'uri-hash',
+                       'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
                        'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
                        'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
                        'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
                        'network' => 'internal-network', 'icid' => 'internal-icid',
                        'iaid' => 'internal-iaid'];
 
+               if ($usermode) {
+                       $fields['user-item'] = ['ignored' => 'internal-user-ignored'];
+               }
+
                $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 
                $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 
+               $fields['item-delivery-data'] = self::DELIVERY_DATA_FIELDLIST;
+
+               $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
+
                $fields['author'] = ['url' => 'author-link', 'name' => 'author-name',
                        'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 
@@ -536,6 +572,8 @@ class Item extends BaseObject
 
                $fields['sign'] = ['signed_text', 'signature', 'signer'];
 
+               $fields['diaspora-interaction'] = ['interaction'];
+
                return $fields;
        }
 
@@ -553,7 +591,13 @@ class Item extends BaseObject
                } else {
                        $master_table = "`item`";
                }
-               return "$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
+               return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
+                       AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
+                       AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
+                       AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
+                       AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
+                       AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
+                       GRAVITY_PARENT, GRAVITY_PARENT);
        }
 
        /**
@@ -584,8 +628,10 @@ class Item extends BaseObject
                                OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
                                STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
                                STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
-                               LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
-                               CONTACT_IS_SHARING, CONTACT_IS_FRIEND, GRAVITY_PARENT, intval($uid));
+                               LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
+                               LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
+                               LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
+                               Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
                } else {
                        if (strpos($sql_commands, "`contact`.") !== false) {
                                $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
@@ -614,6 +660,10 @@ class Item extends BaseObject
                        $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
                }
 
+               if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
+                       $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
+               }
+
                if (strpos($sql_commands, "`item-activity`.") !== false) {
                        $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`id` = `item`.`iaid`";
                }
@@ -622,6 +672,14 @@ class Item extends BaseObject
                        $joins .= " LEFT JOIN `item-content` ON `item-content`.`id` = `item`.`icid`";
                }
 
+               if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
+                       $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
+               }
+
+               if (strpos($sql_commands, "`permissionset`.") !== false) {
+                       $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
+               }
+
                if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
                        $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
                }
@@ -654,11 +712,20 @@ class Item extends BaseObject
                        $selected[] = 'internal-activity';
                }
 
+               if (in_array('ignored', $selected)) {
+                       $selected[] = 'internal-user-ignored';
+               }
+
+               if (in_array('signed_text', $selected)) {
+                       $selected[] = 'interaction';
+               }
+
                $selection = [];
                foreach ($fields as $table => $table_fields) {
                        foreach ($table_fields as $field => $select) {
                                if (empty($selected) || in_array($select, $selected)) {
-                                       if (self::isLegacyMode() && in_array($select, self::MIXED_CONTENT_FIELDLIST)) {
+                                       $legacy_fields = array_merge(self::DELIVERY_DATA_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
+                                       if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
                                                $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
                                        }
                                        if (is_int($field)) {
@@ -731,12 +798,12 @@ class Item extends BaseObject
                }
 
                // To ensure the data integrity we do it in an transaction
-               dba::transaction();
+               DBA::transaction();
 
                // We cannot simply expand the condition to check for origin entries
                // The condition needn't to be a simple array but could be a complex condition.
                // And we have to execute this query before the update to ensure to fetch the same data.
-               $items = dba::select('item', ['id', 'origin', 'uri', 'created', 'uri-hash', 'iaid', 'icid', 'tag', 'file'], $condition);
+               $items = DBA::select('item', ['id', 'origin', 'uri', 'created', 'uri-hash', 'iaid', 'icid', 'tag', 'file'], $condition);
 
                $content_fields = [];
                foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
@@ -750,8 +817,8 @@ class Item extends BaseObject
                        }
                }
 
-               $author_owner_fields = ['author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link'];
-               foreach ($author_owner_fields as $field) {
+               $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link'];
+               foreach ($clear_fields as $field) {
                        if (array_key_exists($field, $fields)) {
                                $fields[$field] = null;
                        }
@@ -771,35 +838,42 @@ class Item extends BaseObject
                        $files = '';
                }
 
+               $delivery_data = ['postopts' => defaults($fields, 'postopts', ''),
+                       'inform' => defaults($fields, 'inform', '')];
+
+               $fields['postopts'] = null;
+               $fields['inform'] = null;
+
                if (!empty($fields)) {
-                       $success = dba::update('item', $fields, $condition);
+                       $success = DBA::update('item', $fields, $condition);
 
                        if (!$success) {
-                               dba::close($items);
-                               dba::rollback();
+                               DBA::close($items);
+                               DBA::rollback();
                                return false;
                        }
                }
 
                // When there is no content for the "old" item table, this will count the fetched items
-               $rows = dba::affected_rows();
+               $rows = DBA::affectedRows();
+
+               while ($item = DBA::fetch($items)) {
 
-               while ($item = dba::fetch($items)) {
                        // This part here can safely be removed when the legacy fields in the item had been removed
                        if (empty($item['uri-hash']) && !empty($item['uri']) && !empty($item['created'])) {
 
                                // Fetch the uri-hash from an existing item entry if there is one
                                $item_condition = ["`uri` = ? AND `uri-hash` != ''", $item['uri']];
-                               $existing = dba::selectfirst('item', ['uri-hash'], $item_condition);
-                               if (DBM::is_result($existing)) {
+                               $existing = DBA::selectfirst('item', ['uri-hash'], $item_condition);
+                               if (DBA::isResult($existing)) {
                                        $item['uri-hash'] = $existing['uri-hash'];
                                } else {
                                        $item['uri-hash'] = self::itemHash($item['uri'], $item['created']);
                                }
 
-                               dba::update('item', ['uri-hash' => $item['uri-hash']], ['id' => $item['id']]);
-                               dba::update('item-activity', ['uri-hash' => $item['uri-hash']], ["`uri` = ? AND `uri-hash` = ''", $item['uri']]);
-                               dba::update('item-content', ['uri-plink-hash' => $item['uri-hash']], ["`uri` = ? AND `uri-plink-hash` = ''", $item['uri']]);
+                               DBA::update('item', ['uri-hash' => $item['uri-hash']], ['id' => $item['id']]);
+                               DBA::update('item-activity', ['uri-hash' => $item['uri-hash']], ["`uri` = ? AND `uri-hash` = ''", $item['uri']]);
+                               DBA::update('item-content', ['uri-plink-hash' => $item['uri-hash']], ["`uri` = ? AND `uri-plink-hash` = ''", $item['uri']]);
                        }
 
                        if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
@@ -811,8 +885,8 @@ class Item extends BaseObject
                                self::updateActivity($content_fields, $update_condition);
 
                                if (empty($item['iaid'])) {
-                                       $item_activity = dba::selectFirst('item-activity', ['id'], ['uri-hash' => $item['uri-hash']]);
-                                       if (DBM::is_result($item_activity)) {
+                                       $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-hash' => $item['uri-hash']]);
+                                       if (DBA::isResult($item_activity)) {
                                                $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
                                                foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
                                                        if (self::isLegacyMode()) {
@@ -821,17 +895,17 @@ class Item extends BaseObject
                                                                unset($item_fields[$field]);
                                                        }
                                                }
-                                               dba::update('item', $item_fields, ['id' => $item['id']]);
+                                               DBA::update('item', $item_fields, ['id' => $item['id']]);
 
-                                               if (!empty($item['icid']) && !dba::exists('item', ['icid' => $item['icid']])) {
-                                                       dba::delete('item-content', ['id' => $item['icid']]);
+                                               if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
+                                                       DBA::delete('item-content', ['id' => $item['icid']]);
                                                }
                                        }
                                } elseif (!empty($item['icid'])) {
-                                       dba::update('item', ['icid' => null], ['id' => $item['id']]);
+                                       DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 
-                                       if (!dba::exists('item', ['icid' => $item['icid']])) {
-                                               dba::delete('item-content', ['id' => $item['icid']]);
+                                       if (!DBA::exists('item', ['icid' => $item['icid']])) {
+                                               DBA::delete('item-content', ['id' => $item['icid']]);
                                        }
                                }
                        } else {
@@ -843,8 +917,8 @@ class Item extends BaseObject
                                self::updateContent($content_fields, $update_condition);
 
                                if (empty($item['icid'])) {
-                                       $item_content = dba::selectFirst('item-content', [], ['uri-plink-hash' => $item['uri-hash']]);
-                                       if (DBM::is_result($item_content)) {
+                                       $item_content = DBA::selectFirst('item-content', [], ['uri-plink-hash' => $item['uri-hash']]);
+                                       if (DBA::isResult($item_content)) {
                                                $item_fields = ['icid' => $item_content['id']];
                                                // Clear all fields in the item table that have a content in the item-content table
                                                foreach ($item_content as $field => $content) {
@@ -856,7 +930,7 @@ class Item extends BaseObject
                                                                }
                                                        }
                                                }
-                                               dba::update('item', $item_fields, ['id' => $item['id']]);
+                                               DBA::update('item', $item_fields, ['id' => $item['id']]);
                                        }
                                }
                        }
@@ -864,17 +938,19 @@ class Item extends BaseObject
                        if (!empty($tags)) {
                                Term::insertFromTagFieldByItemId($item['id'], $tags);
                                if (!empty($item['tag'])) {
-                                       dba::update('item', ['tag' => ''], ['id' => $item['id']]);
+                                       DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
                                }
                        }
 
                        if (!empty($files)) {
                                Term::insertFromFileFieldByItemId($item['id'], $files);
                                if (!empty($item['file'])) {
-                                       dba::update('item', ['file' => ''], ['id' => $item['id']]);
+                                       DBA::update('item', ['file' => ''], ['id' => $item['id']]);
                                }
                        }
 
+                       self::updateDeliveryData($item['id'], $delivery_data);
+
                        self::updateThread($item['id']);
 
                        // We only need to notfiy others when it is an original entry from us.
@@ -884,8 +960,8 @@ class Item extends BaseObject
                        }
                }
 
-               dba::close($items);
-               dba::commit();
+               DBA::close($items);
+               DBA::commit();
                return $rows;
        }
 
@@ -897,11 +973,11 @@ class Item extends BaseObject
         */
        public static function delete($condition, $priority = PRIORITY_HIGH)
        {
-               $items = dba::select('item', ['id'], $condition);
-               while ($item = dba::fetch($items)) {
+               $items = self::select(['id'], $condition);
+               while ($item = self::fetch($items)) {
                        self::deleteById($item['id'], $priority);
                }
-               dba::close($items);
+               DBA::close($items);
        }
 
        /**
@@ -916,18 +992,18 @@ class Item extends BaseObject
                        return;
                }
 
-               $items = dba::select('item', ['id', 'uid'], $condition);
-               while ($item = dba::fetch($items)) {
+               $items = self::select(['id', 'uid'], $condition);
+               while ($item = self::fetch($items)) {
                        // "Deleting" global items just means hiding them
                        if ($item['uid'] == 0) {
-                               dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
+                               DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
                        } elseif ($item['uid'] == $uid) {
                                self::deleteById($item['id'], PRIORITY_HIGH);
                        } else {
                                logger('Wrong ownership. Not deleting item ' . $item['id']);
                        }
                }
-               dba::close($items);
+               DBA::close($items);
        }
 
        /**
@@ -943,9 +1019,10 @@ class Item extends BaseObject
                // locate item to be deleted
                $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
                        'deleted', 'file', 'resource-id', 'event-id', 'attach',
-                       'verb', 'object-type', 'object', 'target', 'contact-id'];
+                       'verb', 'object-type', 'object', 'target', 'contact-id',
+                       'icid', 'iaid', 'psid'];
                $item = self::selectFirst($fields, ['id' => $item_id]);
-               if (!DBM::is_result($item)) {
+               if (!DBA::isResult($item)) {
                        logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
                        return false;
                }
@@ -956,7 +1033,7 @@ class Item extends BaseObject
                }
 
                $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
-               if (!DBM::is_result($parent)) {
+               if (!DBA::isResult($parent)) {
                        $parent = ['origin' => false];
                }
 
@@ -986,7 +1063,7 @@ class Item extends BaseObject
                 * 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']]);
+                       DBA::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
                }
 
                // If item is a link to an event, delete the event.
@@ -998,7 +1075,7 @@ class Item extends BaseObject
                foreach (explode(", ", $item['attach']) as $attach) {
                        preg_match("|attach/(\d+)|", $attach, $matches);
                        if (is_array($matches) && count($matches) > 1) {
-                               dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
+                               DBA::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
                        }
                }
 
@@ -1006,12 +1083,8 @@ class Item extends BaseObject
                self::deleteTagsFromItem($item);
 
                // Set the item to "deleted"
-               // This erasing of item content is superfluous for items with a matching item-content.
-               // But for the next time we will still have old content in the item table.
-               $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow(),
-                       'body' => '', 'title' => '', 'content-warning' => '', 'rendered-hash' => '', 'rendered-html' => '',
-                       'object' => '', 'target' => '', 'tag' => '', 'postopts' => '', 'attach' => '', 'file' => ''];
-               dba::update('item', $item_fields, ['id' => $item['id']]);
+               $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
+               DBA::update('item', $item_fields, ['id' => $item['id']]);
 
                Term::insertFromTagFieldByItemId($item['id'], '');
                Term::insertFromFileFieldByItemId($item['id'], '');
@@ -1021,6 +1094,19 @@ class Item extends BaseObject
                        self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
                }
 
+               DBA::delete('item-delivery-data', ['iid' => $item['id']]);
+
+               // We don't delete the item-activity here, since we need some of the data for ActivityPub
+
+               if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
+                       DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
+               }
+               // When the permission set will be used in photo and events as well,
+               // this query here needs to be extended.
+               if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
+                       DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
+               }
+
                // If it's the parent of a comment thread, kill all the kids
                if ($item['id'] == $item['parent']) {
                        self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
@@ -1038,8 +1124,8 @@ class Item extends BaseObject
 
                        // When we delete just our local user copy of an item, we have to set a marker to hide it
                        $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
-                       if (DBM::is_result($global_item)) {
-                               dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
+                       if (DBA::isResult($global_item)) {
+                               DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
                        }
                }
 
@@ -1062,7 +1148,7 @@ class Item extends BaseObject
                }
 
                $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
-               if (!DBM::is_result($i)) {
+               if (!DBA::isResult($i)) {
                        return;
                }
 
@@ -1095,7 +1181,7 @@ class Item extends BaseObject
                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();
+                       $prefix_host = get_app()->getHostName();
                } else {
                        $prefix_host = '';
 
@@ -1133,7 +1219,7 @@ class Item extends BaseObject
                } elseif (!empty($item['uri'])) {
                        $guid = self::guidFromUri($item['uri'], $prefix_host);
                } else {
-                       $guid = System::createGUID(32, hash('crc32', $prefix_host));
+                       $guid = System::createUUID(hash('crc32', $prefix_host));
                }
 
                return $guid;
@@ -1162,8 +1248,8 @@ class Item extends BaseObject
 
                // 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)) {
+                       $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
+                       if (DBA::isResult($self)) {
                                $contact_id = $self["id"];
                        }
                }
@@ -1172,6 +1258,17 @@ class Item extends BaseObject
                return $contact_id;
        }
 
+       // This function will finally cover most of the preparation functionality in mod/item.php
+       public static function prepare(&$item)
+       {
+               $data = BBCode::getAttachmentData($item['body']);
+               if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
+                       && ($posttype != Item::PT_PERSONAL_NOTE)) {
+                       $posttype = Item::PT_PAGE;
+                       $objecttype = ACTIVITY_OBJ_BOOKMARK;
+               }
+       }
+
        public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
        {
                $a = get_app();
@@ -1179,10 +1276,9 @@ class Item extends BaseObject
                // If it is a posting where users should get notifications, then define it as wall posting
                if ($notify) {
                        $item['wall'] = 1;
-                       $item['type'] = 'wall';
                        $item['origin'] = 1;
-                       $item['network'] = NETWORK_DFRN;
-                       $item['protocol'] = PROTOCOL_DFRN;
+                       $item['network'] = Protocol::DFRN;
+                       $item['protocol'] = Conversation::PARCEL_DFRN;
 
                        if (is_int($notify)) {
                                $priority = $notify;
@@ -1190,12 +1286,15 @@ class Item extends BaseObject
                                $priority = PRIORITY_HIGH;
                        }
                } else {
-                       $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
+                       $item['network'] = trim(defaults($item, 'network', Protocol::PHANTOM));
                }
 
                $item['guid'] = self::guid($item, $notify);
                $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
 
+               // Store URI data
+               $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
+
                // Store conversation data
                $item = Conversation::insert($item);
 
@@ -1205,22 +1304,21 @@ class Item extends BaseObject
                 */
 
                $dsprsig = null;
-               if (x($item, 'dsprsig')) {
+               if (isset($item['dsprsig'])) {
                        $encoded_signature = $item['dsprsig'];
                        $dsprsig = json_decode(base64_decode($item['dsprsig']));
                        unset($item['dsprsig']);
                }
 
-               if (!empty($item['diaspora_signed_text'])) {
+               $diaspora_signed_text = '';
+               if (isset($item['diaspora_signed_text'])) {
                        $diaspora_signed_text = $item['diaspora_signed_text'];
                        unset($item['diaspora_signed_text']);
-               } else {
-                       $diaspora_signed_text = '';
                }
 
                // Converting the plink
                /// @TODO Check if this is really still needed
-               if ($item['network'] == NETWORK_OSTATUS) {
+               if ($item['network'] == Protocol::OSTATUS) {
                        if (isset($item['plink'])) {
                                $item['plink'] = OStatus::convertHref($item['plink']);
                        } elseif (isset($item['uri'])) {
@@ -1232,19 +1330,15 @@ class Item extends BaseObject
                        $item['parent-uri'] = $item['thr-parent'];
                }
 
-               $item['type'] = defaults($item, 'type', 'remote');
-
                if (isset($item['gravity'])) {
                        $item['gravity'] = intval($item['gravity']);
                } elseif ($item['parent-uri'] === $item['uri']) {
                        $item['gravity'] = GRAVITY_PARENT;
                } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
                        $item['gravity'] = GRAVITY_COMMENT;
-               } elseif ($item['type'] == 'activity') {
-                       $item['gravity'] = GRAVITY_ACTIVITY;
                } else {
                        $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
-                       logger('Unknown gravity for verb: ' . $item['verb'] . ' - type: ' . $item['type'], LOGGER_DEBUG);
+                       logger('Unknown gravity for verb: ' . $item['verb'], LOGGER_DEBUG);
                }
 
                $uid = intval($item['uid']);
@@ -1252,8 +1346,8 @@ class Item extends BaseObject
                // 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))) {
+               $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
+               if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
                        $expire_interval = $user['expire'];
                }
 
@@ -1271,12 +1365,12 @@ class Item extends BaseObject
                 * We have to check several networks since Friendica posts could be repeated
                 * via OStatus (maybe Diasporsa as well)
                 */
-               if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
+               if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS, ""])) {
                        $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
                                trim($item['uri']), $item['uid'],
-                               NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
+                               Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
                        $existing = self::selectFirst(['id', 'network'], $condition);
-                       if (DBM::is_result($existing)) {
+                       if (DBA::isResult($existing)) {
                                // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
                                if ($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']);
@@ -1287,14 +1381,12 @@ class Item extends BaseObject
                }
 
                // Ensure to always have the same creation date.
-               $existing = dba::selectfirst('item', ['created', 'uri-hash'], ['uri' => $item['uri']]);
-               if (DBM::is_result($existing)) {
+               $existing = self::selectfirst(['created', 'uri-hash'], ['uri' => $item['uri']]);
+               if (DBA::isResult($existing)) {
                        $item['created'] = $existing['created'];
                        $item['uri-hash'] = $existing['uri-hash'];
                }
 
-               self::addLanguageToItemArray($item);
-
                $item['wall']          = intval(defaults($item, 'wall', 0));
                $item['extid']         = trim(defaults($item, 'extid', ''));
                $item['author-name']   = trim(defaults($item, 'author-name', ''));
@@ -1314,6 +1406,7 @@ class Item extends BaseObject
                $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
                $item['deleted']       = 0;
                $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
+               $item['post-type']     = defaults($item, 'post-type', self::PT_ARTICLE);
                $item['verb']          = trim(defaults($item, 'verb', ''));
                $item['object-type']   = trim(defaults($item, 'object-type', ''));
                $item['object']        = trim(defaults($item, 'object', ''));
@@ -1325,7 +1418,6 @@ class Item extends BaseObject
                $item['deny_cid']      = trim(defaults($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', ''));
@@ -1346,6 +1438,8 @@ class Item extends BaseObject
                        return 0;
                }
 
+               self::addLanguageToItemArray($item);
+
                // Items cannot be stored before they happen ...
                if ($item['created'] > DateTimeFormat::utcNow()) {
                        $item['created'] = DateTimeFormat::utcNow();
@@ -1381,19 +1475,10 @@ class Item extends BaseObject
                        return 0;
                }
 
-               // These fields aren't stored anymore in the item table, they are fetched upon request
-               unset($item['author-link']);
-               unset($item['author-name']);
-               unset($item['author-avatar']);
-
-               unset($item['owner-link']);
-               unset($item['owner-name']);
-               unset($item['owner-avatar']);
-
-               if ($item['network'] == NETWORK_PHANTOM) {
+               if ($item['network'] == Protocol::PHANTOM) {
                        logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
 
-                       $item['network'] = NETWORK_DFRN;
+                       $item['network'] = Protocol::DFRN;
                        logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
                }
 
@@ -1435,7 +1520,7 @@ class Item extends BaseObject
                        $params = ['order' => ['id' => false]];
                        $parent = self::selectFirst($fields, $condition, $params);
 
-                       if (DBM::is_result($parent)) {
+                       if (DBA::isResult($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.
@@ -1449,7 +1534,7 @@ class Item extends BaseObject
                                        $params = ['order' => ['id' => false]];
                                        $toplevel_parent = self::selectFirst($fields, $condition, $params);
 
-                                       if (DBM::is_result($toplevel_parent)) {
+                                       if (DBA::isResult($toplevel_parent)) {
                                                $parent = $toplevel_parent;
                                        }
                                }
@@ -1483,13 +1568,13 @@ class Item extends BaseObject
 
                                // 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)) {
+                               $user = DBA::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
+                               if (DBA::isResult($user)) {
                                        $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
                                        $self_id = Contact::getIdForURL($self, 0, true);
                                        logger("'myself' is ".$self_id." for parent ".$parent_id." checking against ".$item['author-id']." and ".$item['owner-id'], LOGGER_DEBUG);
                                        if (($item['author-id'] == $self_id) || ($item['owner-id'] == $self_id)) {
-                                               dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
+                                               DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
                                                logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
                                        }
                                }
@@ -1512,15 +1597,18 @@ class Item extends BaseObject
                        }
                }
 
+               $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
+               $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
+
                $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
-                       $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
+                       $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
                if (self::exists($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($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
+               if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
                        $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
                        if (self::exists($condition)) {
                                logger('duplicated item with the same guid found. '.print_r($item,true));
@@ -1541,7 +1629,7 @@ class Item extends BaseObject
                        $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"]]);
+                       self::update(['global' => true], ['uri' => $item["uri"]]);
                } else {
                        $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
                }
@@ -1610,20 +1698,38 @@ class Item extends BaseObject
                        $files = '';
                }
 
+               // Creates or assigns the permission set
+               $item['psid'] = PermissionSet::fetchIDForPost($item);
+
                // We are doing this outside of the transaction to avoid timing problems
                if (!self::insertActivity($item)) {
                        self::insertContent($item);
                }
 
-               dba::transaction();
-               $ret = dba::insert('item', $item);
+               $delivery_data = ['postopts' => defaults($item, 'postopts', ''),
+                       'inform' => defaults($item, 'inform', '')];
+
+               unset($item['postopts']);
+               unset($item['inform']);
+
+               // These fields aren't stored anymore in the item table, they are fetched upon request
+               unset($item['author-link']);
+               unset($item['author-name']);
+               unset($item['author-avatar']);
+
+               unset($item['owner-link']);
+               unset($item['owner-name']);
+               unset($item['owner-avatar']);
+
+               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)) {
-                       $current_post = dba::lastInsertId();
+               if (DBA::isResult($ret)) {
+                       $current_post = DBA::lastInsertId();
                } else {
                        // This can happen - for example - if there are locking timeouts.
-                       dba::rollback();
+                       DBA::rollback();
 
                        // Store the data into a spool file so that we can try again later.
 
@@ -1639,6 +1745,10 @@ class Item extends BaseObject
                        $spoolpath = get_spoolpath();
                        if ($spoolpath != "") {
                                $spool = $spoolpath.'/'.$file;
+
+                               // Ensure to have the removed data from above again in the item array
+                               $item = array_merge($item, $delivery_data);
+
                                file_put_contents($spool, json_encode($item));
                                logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
                        }
@@ -1648,26 +1758,26 @@ class Item extends BaseObject
                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();
+                       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']]);
+               $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();
+                       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();
+                       DBA::rollback();
                        return 0;
                }
 
@@ -1679,7 +1789,7 @@ class Item extends BaseObject
                }
 
                // Set parent id
-               dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
+               self::update(['parent' => $parent_id], ['id' => $current_post]);
 
                $item['id'] = $current_post;
                $item['parent'] = $parent_id;
@@ -1687,9 +1797,9 @@ class Item extends BaseObject
                // update the commented timestamp on the parent
                // Only update "commented" if it is really a comment
                if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
-                       dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
+                       self::update(['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
                } else {
-                       dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
+                       self::update(['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
                }
 
                if ($dsprsig) {
@@ -1702,14 +1812,17 @@ class Item extends BaseObject
                                logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
                        }
 
-                       dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
-                                               'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
+                       if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
+                               DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
+                       } else {
+                               // The other fields are used by very old Friendica servers, so we currently store them differently
+                               DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
+                                       'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
+                       }
                }
 
                if (!empty($diaspora_signed_text)) {
-                       // Formerly we stored the signed text, the signature and the author in different fields.
-                       // We now store the raw data so that we are more flexible.
-                       dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
+                       DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
                }
 
                $deleted = self::tagDeliver($item['uid'], $current_post);
@@ -1720,7 +1833,7 @@ class Item extends BaseObject
                 */
                if (!$deleted && !$dontcache) {
                        $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
-                       if (DBM::is_result($posted_item)) {
+                       if (DBA::isResult($posted_item)) {
                                if ($notify) {
                                        Addon::callHooks('post_local_end', $posted_item);
                                } else {
@@ -1737,7 +1850,11 @@ class Item extends BaseObject
                        self::updateThread($parent_id);
                }
 
-               dba::commit();
+               $delivery_data['iid'] = $current_post;
+
+               self::insertDeliveryData($delivery_data);
+
+               DBA::commit();
 
                /*
                 * Due to deadlock issues with the "term" table we are doing these steps after the commit.
@@ -1768,6 +1885,35 @@ class Item extends BaseObject
                return $current_post;
        }
 
+       /**
+        * @brief Insert a new item delivery data entry
+        *
+        * @param array $item The item fields that are to be inserted
+        */
+       private static function insertDeliveryData($delivery_data)
+       {
+               if (empty($delivery_data['iid']) || (empty($delivery_data['postopts']) && empty($delivery_data['inform']))) {
+                       return;
+               }
+
+               DBA::insert('item-delivery-data', $delivery_data);
+       }
+
+       /**
+        * @brief Update an existing item delivery data entry
+        *
+        * @param integer $id The item id that is to be updated
+        * @param array $item The item fields that are to be inserted
+        */
+       private static function updateDeliveryData($id, $delivery_data)
+       {
+               if (empty($id) || (empty($delivery_data['postopts']) && empty($delivery_data['inform']))) {
+                       return;
+               }
+
+               DBA::update('item-delivery-data', $delivery_data, ['iid' => $id], true);
+       }
+
        /**
         * @brief Insert a new item content entry
         *
@@ -1782,7 +1928,7 @@ class Item extends BaseObject
                }
 
                $fields = ['uri' => $item['uri'], 'activity' => $activity_index,
-                       'uri-hash' => $item['uri-hash']];
+                       'uri-hash' => $item['uri-hash'], 'uri-id' => $item['uri-id']];
 
                // We just remove everything that is content
                foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
@@ -1796,16 +1942,17 @@ class Item extends BaseObject
                }
 
                // Do we already have this content?
-               $item_activity = dba::selectFirst('item-activity', ['id'], ['uri-hash' => $item['uri-hash']]);
-               if (DBM::is_result($item_activity)) {
+               $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-hash' => $item['uri-hash']]);
+               if (DBA::isResult($item_activity)) {
                        $item['iaid'] = $item_activity['id'];
                        logger('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
-               } elseif (dba::insert('item-activity', $fields)) {
-                       $item['iaid'] = dba::lastInsertId();
+               } elseif (DBA::insert('item-activity', $fields)) {
+                       $item['iaid'] = DBA::lastInsertId();
                        logger('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
                } else {
                        // This shouldn't happen.
                        logger('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
+                       Lock::release('item_insert_activity');
                        return false;
                }
                if ($locked) {
@@ -1821,7 +1968,8 @@ class Item extends BaseObject
         */
        private static function insertContent(&$item)
        {
-               $fields = ['uri' => $item['uri'], 'uri-plink-hash' => $item['uri-hash']];
+               $fields = ['uri' => $item['uri'], 'uri-plink-hash' => $item['uri-hash'],
+                       'uri-id' => $item['uri-id']];
 
                foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
                        if (isset($item[$field])) {
@@ -1837,12 +1985,12 @@ class Item extends BaseObject
                }
 
                // Do we already have this content?
-               $item_content = dba::selectFirst('item-content', ['id'], ['uri-plink-hash' => $item['uri-hash']]);
-               if (DBM::is_result($item_content)) {
+               $item_content = DBA::selectFirst('item-content', ['id'], ['uri-plink-hash' => $item['uri-hash']]);
+               if (DBA::isResult($item_content)) {
                        $item['icid'] = $item_content['id'];
                        logger('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
-               } elseif (dba::insert('item-content', $fields)) {
-                       $item['icid'] = dba::lastInsertId();
+               } elseif (DBA::insert('item-content', $fields)) {
+                       $item['icid'] = DBA::lastInsertId();
                        logger('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
                } else {
                        // This shouldn't happen.
@@ -1874,7 +2022,7 @@ class Item extends BaseObject
 
                logger('Update activity for ' . json_encode($condition));
 
-               dba::update('item-activity', $fields, $condition, true);
+               DBA::update('item-activity', $fields, $condition, true);
 
                return true;
        }
@@ -1903,7 +2051,7 @@ class Item extends BaseObject
 
                logger('Update content for ' . json_encode($condition));
 
-               dba::update('item-content', $fields, $condition, true);
+               DBA::update('item-content', $fields, $condition, true);
        }
 
        /**
@@ -1916,16 +2064,16 @@ class Item extends BaseObject
        {
                $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
                $parent = self::selectFirst(['owner-id'], $condition);
-               if (!DBM::is_result($parent)) {
+               if (!DBA::isResult($parent)) {
                        return;
                }
 
                // Only distribute public items from native networks
                $condition = ['id' => $itemid, 'uid' => 0,
-                       'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
+                       'network' => [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS, ""],
                        'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
                $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
-               if (!DBM::is_result($item)) {
+               if (!DBA::isResult($item)) {
                        return;
                }
 
@@ -1940,18 +2088,52 @@ class Item extends BaseObject
 
                $users = [];
 
-               $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
-                       $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
-               $contacts = dba::select('contact', ['uid'], $condition);
-               while ($contact = dba::fetch($contacts)) {
+               /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
+               $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
+               if (!DBA::isResult($owner)) {
+                       return;
+               }
+
+               $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
+               $contacts = DBA::select('contact', ['uid'], $condition);
+               while ($contact = DBA::fetch($contacts)) {
+                       if ($contact['uid'] == 0) {
+                               continue;
+                       }
+
+                       $users[$contact['uid']] = $contact['uid'];
+               }
+               DBA::close($contacts);
+
+               $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
+               $contacts = DBA::select('contact', ['uid'], $condition);
+               while ($contact = DBA::fetch($contacts)) {
+                       if ($contact['uid'] == 0) {
+                               continue;
+                       }
+
                        $users[$contact['uid']] = $contact['uid'];
                }
+               DBA::close($contacts);
+
+               if (!empty($owner['alias'])) {
+                       $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
+                       $contacts = DBA::select('contact', ['uid'], $condition);
+                       while ($contact = DBA::fetch($contacts)) {
+                               if ($contact['uid'] == 0) {
+                                       continue;
+                               }
+
+                               $users[$contact['uid']] = $contact['uid'];
+                       }
+                       DBA::close($contacts);
+               }
 
                $origin_uid = 0;
 
                if ($item['uri'] != $item['parent-uri']) {
                        $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
-                       while ($parent = dba::fetch($parents)) {
+                       while ($parent = self::fetch($parents)) {
                                $users[$parent['uid']] = $parent['uid'];
                                if ($parent['origin'] && !$origin) {
                                        $origin_uid = $parent['uid'];
@@ -1986,25 +2168,19 @@ class Item extends BaseObject
                }
 
                if (empty($item['contact-id'])) {
-                       $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
-                       if (!DBM::is_result($self)) {
+                       $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
+                       if (!DBA::isResult($self)) {
                                return;
                        }
                        $item['contact-id'] = $self['id'];
                }
 
-               if (in_array($item['type'], ["net-comment", "wall-comment"])) {
-                       $item['type'] = 'remote-comment';
-               } elseif ($item['type'] == 'wall') {
-                       $item['type'] = 'remote';
-               }
-
                /// @todo Handling of "event-id"
 
                $notify = false;
                if ($item['uri'] == $item['parent-uri']) {
-                       $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
-                       if (DBM::is_result($contact)) {
+                       $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
+                       if (DBA::isResult($contact)) {
                                $notify = self::isRemoteSelf($contact, $item);
                        }
                }
@@ -2033,7 +2209,7 @@ class Item extends BaseObject
                $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
                $item = self::selectFirst($fields, $condition);
 
-               if (!DBM::is_result($item)) {
+               if (!DBA::isResult($item)) {
                        return;
                }
 
@@ -2048,7 +2224,7 @@ class Item extends BaseObject
                }
 
                // is it an entry from a connector? Only add an entry for natively connected networks
-               if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
+               if (!in_array($item["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS, ""])) {
                        return;
                }
 
@@ -2058,7 +2234,7 @@ class Item extends BaseObject
 
                $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
 
-               if (DBM::is_result($item)) {
+               if (DBA::isResult($item)) {
                        // Preparing public shadow (removing user specific data)
                        $item['uid'] = 0;
                        unset($item['id']);
@@ -2067,18 +2243,14 @@ class Item extends BaseObject
                        unset($item['mention']);
                        unset($item['origin']);
                        unset($item['starred']);
+                       unset($item['postopts']);
+                       unset($item['inform']);
                        if ($item['uri'] == $item['parent-uri']) {
                                $item['contact-id'] = $item['owner-id'];
                        } else {
                                $item['contact-id'] = $item['author-id'];
                        }
 
-                       if (in_array($item['type'], ["net-comment", "wall-comment"])) {
-                               $item['type'] = 'remote-comment';
-                       } elseif ($item['type'] == 'wall') {
-                               $item['type'] = 'remote';
-                       }
-
                        $public_shadow = self::insert($item, false, false, true);
 
                        logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
@@ -2095,7 +2267,7 @@ class Item extends BaseObject
        public static function addShadowPost($itemid)
        {
                $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
-               if (!DBM::is_result($item)) {
+               if (!DBA::isResult($item)) {
                        return;
                }
 
@@ -2132,21 +2304,17 @@ class Item extends BaseObject
                unset($item['mention']);
                unset($item['origin']);
                unset($item['starred']);
+               unset($item['postopts']);
+               unset($item['inform']);
                $item['contact-id'] = Contact::getIdForURL($item['author-link']);
 
-               if (in_array($item['type'], ["net-comment", "wall-comment"])) {
-                       $item['type'] = 'remote-comment';
-               } elseif ($item['type'] == 'wall') {
-                       $item['type'] = 'remote';
-               }
-
                $public_shadow = self::insert($item, false, false, true);
 
                logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
 
                // If this was a comment to a Diaspora post we don't get our comment back.
                // This means that we have to distribute the comment by ourselves.
-               if ($origin && self::exists(['id' => $parent, 'network' => NETWORK_DIASPORA])) {
+               if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
                        self::distribute($public_shadow);
                }
        }
@@ -2157,7 +2325,7 @@ class Item extends BaseObject
         */
        private static function addLanguageToItemArray(&$item)
        {
-               $naked_body = Text\BBCode::toPlaintext($item['body'], false);
+               $naked_body = BBCode::toPlaintext($item['body'], false);
 
                $ld = new Text_LanguageDetect();
                $ld->setNameMode(2);
@@ -2207,16 +2375,10 @@ class Item extends BaseObject
        public static function newURI($uid, $guid = "")
        {
                if ($guid == "") {
-                       $guid = System::createGUID(32);
+                       $guid = System::createUUID();
                }
 
-               $hostname = self::getApp()->get_hostname();
-
-               $user = dba::selectFirst('user', ['nickname'], ['uid' => $uid]);
-
-               $uri = "urn:X-dfrn:" . $hostname . ':' . $user['nickname'] . ':' . $guid;
-
-               return $uri;
+               return self::getApp()->getBaseURL() . '/objects/' . $guid;
        }
 
        /**
@@ -2231,37 +2393,37 @@ class Item extends BaseObject
        private static function updateContact($arr)
        {
                // Unarchive the author
-               $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
-               if (DBM::is_result($contact)) {
+               $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
+               if (DBA::isResult($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 = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
+               if (DBA::isResult($contact)) {
                        Contact::unmarkForArchival($contact);
                }
 
                $update = (!$arr['private'] && ((defaults($arr, 'author-link', '') === defaults($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' => $arr['contact-id'], 'forum' => true])) {
+               if (!$update && ($arr["network"] == Protocol::DFRN) && ($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']],
+                       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']],
+                       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']],
+                               DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
                                        ['id' => $arr['author-id']]);
                        }
                }
@@ -2338,13 +2500,19 @@ class Item extends BaseObject
        public static function getGuidById($id)
        {
                $item = self::selectFirst(['guid'], ['id' => $id]);
-               if (DBM::is_result($item)) {
+               if (DBA::isResult($item)) {
                        return $item['guid'];
                } else {
                        return '';
                }
        }
 
+       /**
+        * This function is only used for the old Friendica app on Android that doesn't like paths with guid
+        * @param string $guid item guid
+        * @param int    $uid  user id
+        * @return array with id and nick of the item with the given guid
+        */
        public static function getIdAndNickByGuid($guid, $uid = 0)
        {
                $nick = "";
@@ -2356,26 +2524,28 @@ class Item extends BaseObject
 
                // 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"];
+                       $item = self::selectFirst(['id'], ['guid' => $guid, 'uid' => $uid]);
+                       if (DBA::isResult($item)) {
+                               $user = DBA::selectFirst('user', ['nickname'], ['uid' => $uid]);
+                               if (!DBA::isResult($user)) {
+                                       return;
+                               }
+                               $id = $item['id'];
+                               $nick = $user['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 NOT `item`.`private` AND `item`.`wall`
-                                       AND `item`.`guid` = ?", $guid);
-                       if (DBM::is_result($item)) {
-                               $id = $item["id"];
-                               $nick = $item["nickname"];
+                       $condition = ["`guid` = ? AND `uid` != 0", $guid];
+                       $item = self::selectFirst(['id', 'uid'], $condition);
+                       if (DBA::isResult($item)) {
+                               $user = DBA::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
+                               if (!DBA::isResult($user)) {
+                                       return;
+                               }
+                               $id = $item['id'];
+                               $nick = $user['nickname'];
                        }
                }
                return ["nick" => $nick, "id" => $id];
@@ -2391,16 +2561,16 @@ class Item extends BaseObject
        {
                $mention = false;
 
-               $user = dba::selectFirst('user', [], ['uid' => $uid]);
-               if (!DBM::is_result($user)) {
+               $user = DBA::selectFirst('user', [], ['uid' => $uid]);
+               if (!DBA::isResult($user)) {
                        return;
                }
 
-               $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
-               $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
+               $community_page = (($user['page-flags'] == Contact::PAGE_COMMUNITY) ? true : false);
+               $prvgroup = (($user['page-flags'] == Contact::PAGE_PRVGROUP) ? true : false);
 
                $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
-               if (!DBM::is_result($item)) {
+               if (!DBA::isResult($item)) {
                        return;
                }
 
@@ -2428,7 +2598,7 @@ class Item extends BaseObject
                                // 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]);
+                               DBA::delete('item', ['id' => $item_id]);
                                return true;
                        }
                        return;
@@ -2452,8 +2622,8 @@ class Item extends BaseObject
                }
 
                // 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)) {
+               $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
+               if (!DBA::isResult($self)) {
                        return;
                }
 
@@ -2463,12 +2633,13 @@ class Item extends BaseObject
 
                $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
 
+               $psid = PermissionSet::fetchIDForPost($user);
+
                $forum_mode = ($prvgroup ? 2 : 1);
 
                $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
-                       'owner-id' => $owner_id, 'owner-link' => $self['url'], '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]);
+                       'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
+               self::update($fields, ['id' => $item_id]);
 
                self::updateThread($item_id);
 
@@ -2484,13 +2655,13 @@ class Item extends BaseObject
                }
 
                // Prevent the forwarding of posts that are forwarded
-               if (!empty($datarray["extid"]) && ($datarray["extid"] == NETWORK_DFRN)) {
+               if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
                        logger('Already forwarded', LOGGER_DEBUG);
                        return false;
                }
 
                // Prevent to forward already forwarded posts
-               if ($datarray["app"] == $a->get_hostname()) {
+               if ($datarray["app"] == $a->getHostName()) {
                        logger('Already forwarded (second test)', LOGGER_DEBUG);
                        return false;
                }
@@ -2501,7 +2672,7 @@ class Item extends BaseObject
                        return false;
                }
 
-               if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
+               if (($contact['network'] != Protocol::FEED) && $datarray['private']) {
                        logger('Not public', LOGGER_DEBUG);
                        return false;
                }
@@ -2509,9 +2680,9 @@ class Item extends BaseObject
                $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'],
+                       $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
                                        ['uid' => $contact['uid'], 'self' => true]);
-                       if (DBM::is_result($self)) {
+                       if (DBA::isResult($self)) {
                                $datarray['contact-id'] = $self["id"];
 
                                $datarray['owner-name'] = $self["name"];
@@ -2530,13 +2701,13 @@ class Item extends BaseObject
                                unset($datarray['author-id']);
                        }
 
-                       if ($contact['network'] != NETWORK_FEED) {
-                               $datarray["guid"] = System::createGUID(32);
+                       if ($contact['network'] != Protocol::FEED) {
+                               $datarray["guid"] = System::createUUID();
                                unset($datarray["plink"]);
                                $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
                                $datarray["parent-uri"] = $datarray["uri"];
                                $datarray["thr-parent"] = $datarray["uri"];
-                               $datarray["extid"] = NETWORK_DFRN;
+                               $datarray["extid"] = Protocol::DFRN;
                                $urlpart = parse_url($datarray2['author-link']);
                                $datarray["app"] = $urlpart["host"];
                        } else {
@@ -2544,7 +2715,7 @@ class Item extends BaseObject
                        }
                }
 
-               if ($contact['network'] != NETWORK_FEED) {
+               if ($contact['network'] != Protocol::FEED) {
                        // Store the original post
                        $result = self::insert($datarray2, false, false);
                        logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
@@ -2604,8 +2775,8 @@ class Item extends BaseObject
                                        $res = substr($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)) {
+                                       $photo = DBA::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
+                                       if (DBA::isResult($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
@@ -2697,7 +2868,7 @@ class Item extends BaseObject
        }
 
        // returns an array of contact-ids that are allowed to see this object
-       private static function enumeratePermissions($obj)
+       public static function enumeratePermissions($obj)
        {
                $allow_people = expand_acl($obj['allow_cid']);
                $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
@@ -2768,9 +2939,9 @@ class Item extends BaseObject
                        $condition[] = $days;
                }
 
-               $items = self::select(['file', 'resource-id', 'starred', 'type', 'id'], $condition);
+               $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
 
-               if (!DBM::is_result($items)) {
+               if (!DBA::isResult($items)) {
                        return;
                }
 
@@ -2800,9 +2971,9 @@ class Item extends BaseObject
                                continue;
                        } elseif (!$expire_starred && intval($item['starred'])) {
                                continue;
-                       } elseif (!$expire_notes && $item['type'] == 'note') {
+                       } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
                                continue;
-                       } elseif (!$expire_items && $item['type'] != 'note') {
+                       } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
                                continue;
                        }
 
@@ -2810,7 +2981,7 @@ class Item extends BaseObject
 
                        ++$expired;
                }
-               dba::close($items);
+               DBA::close($items);
                logger('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
        }
 
@@ -2818,8 +2989,8 @@ class Item extends BaseObject
        {
                $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)) {
+               $thread = DBA::selectFirst('thread', ['created'], $condition, $params);
+               if (DBA::isResult($thread)) {
                        return substr(DateTimeFormat::local($thread['created']), 0, 10);
                }
                return false;
@@ -2877,7 +3048,7 @@ class Item extends BaseObject
                logger('like: verb ' . $verb . ' item ' . $item_id);
 
                $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
-               if (!DBM::is_result($item)) {
+               if (!DBA::isResult($item)) {
                        logger('like: unknown item ' . $item_id);
                        return false;
                }
@@ -2895,8 +3066,8 @@ class Item extends BaseObject
                }
 
                // Retrieves the local post owner
-               $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
-               if (!DBM::is_result($owner_self_contact)) {
+               $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
+               if (!DBA::isResult($owner_self_contact)) {
                        logger('like: unknown owner ' . $uid);
                        return false;
                }
@@ -2904,8 +3075,8 @@ class Item extends BaseObject
                // Retrieve the current logged in user's public contact
                $author_id = public_contact();
 
-               $author_contact = dba::selectFirst('contact', ['url'], ['id' => $author_id]);
-               if (!DBM::is_result($author_contact)) {
+               $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
+               if (!DBA::isResult($author_contact)) {
                        logger('like: unknown author ' . $author_id);
                        return false;
                }
@@ -2916,8 +3087,8 @@ class Item extends BaseObject
                        $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)) {
+                       $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
+                       if (!DBA::isResult($item_contact)) {
                                logger('like: unknown item contact ' . $item_contact_id);
                                return false;
                        }
@@ -2944,16 +3115,8 @@ class Item extends BaseObject
                $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
 
                // If it exists, mark it as deleted
-               if (DBM::is_result($like_item)) {
-                       // Already voted, undo it
-                       $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
-                       /// @todo Consider using self::update - but before doing so, check the side effects
-                       dba::update('item', $fields, ['id' => $like_item['id']]);
-
-                       // Clean up the Diaspora signatures for this like
-                       dba::delete('sign', ['iid' => $like_item['id']]);
-
-                       Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item['id']);
+               if (DBA::isResult($like_item)) {
+                       self::deleteById($like_item['id']);
 
                        if (!$event_verb_flag || $like_item['verb'] == $activity) {
                                return true;
@@ -2965,22 +3128,21 @@ class Item extends BaseObject
                        return true;
                }
 
-               $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
+               $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE;
 
                $new_item = [
-                       'guid'          => System::createGUID(32),
+                       'guid'          => System::createUUID(),
                        'uri'           => self::newURI($item['uid']),
                        'uid'           => $item['uid'],
                        'contact-id'    => $item_contact_id,
-                       'type'          => 'activity',
                        'wall'          => $item['wall'],
                        'origin'        => 1,
-                       'network'       => NETWORK_DFRN,
+                       'network'       => Protocol::DFRN,
                        'gravity'       => GRAVITY_ACTIVITY,
                        'parent'        => $item['id'],
                        'parent-uri'    => $item['uri'],
                        'thr-parent'    => $item['uri'],
-                       'owner-id'      => $item['owner-id'],
+                       'owner-id'      => $author_id,
                        'author-id'     => $author_id,
                        'body'          => $activity,
                        'verb'          => $activity,
@@ -3015,19 +3177,19 @@ class Item extends BaseObject
        private static function addThread($itemid, $onlyshadow = false)
        {
                $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
-                       'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
+                       'moderated', 'visible', 'starred', 'contact-id', 'post-type',
                        'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
                $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
                $item = self::selectFirst($fields, $condition);
 
-               if (!DBM::is_result($item)) {
+               if (!DBA::isResult($item)) {
                        return;
                }
 
                $item['iid'] = $itemid;
 
                if (!$onlyshadow) {
-                       $result = dba::insert('thread', $item);
+                       $result = DBA::insert('thread', $item);
 
                        logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
                }
@@ -3035,13 +3197,13 @@ class Item extends BaseObject
 
        private static function updateThread($itemid, $setmention = false)
        {
-               $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed',
-                       'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
+               $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
+                       'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
                        'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
                $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
 
                $item = self::selectFirst($fields, $condition);
-               if (!DBM::is_result($item)) {
+               if (!DBA::isResult($item)) {
                        return;
                }
 
@@ -3059,28 +3221,27 @@ class Item extends BaseObject
                        }
                }
 
-               $result = dba::update('thread', $fields, ['iid' => $itemid]);
+               $result = DBA::update('thread', $fields, ['iid' => $itemid]);
 
                logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
        }
 
        private static function deleteThread($itemid, $itemuri = "")
        {
-               $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
-               if (!DBM::is_result($item)) {
+               $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
+               if (!DBA::isResult($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);
+               $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
 
                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, $item["uid"]];
                        if (!self::exists($condition)) {
-                               dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
+                               DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
                                logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
                        }
                }