public static function createDefaultPublicRoom($force = false)
 {
     /**
      * @var $ilDB ilDB
      */
     global $ilDB;
     if ($force) {
         $query = 'DELETE FROM chatroom_settings WHERE room_type = ' . $ilDB->quote('default', 'text');
         $ilDB->manipulate($query);
         $create = true;
     } else {
         $query = 'SELECT * FROM chatroom_settings WHERE room_type = ' . $ilDB->quote('default', 'text');
         $rset = $ilDB->query($query);
         $create = !$ilDB->fetchAssoc($rset);
     }
     if ($create) {
         require_once 'Modules/Chatroom/classes/class.ilObjChatroom.php';
         $newObj = new ilObjChatroom();
         $newObj->setType('chtr');
         $newObj->setTitle('Public Chat');
         $newObj->setDescription('');
         $newObj->create();
         // true for upload
         $newObj->createReference();
         $newObj->putInTree(1);
         $newObj->setPermissions(1);
         $obj_id = $newObj->getId();
         $ref_id = $newObj->getRefId();
         $id = $ilDB->nextId('chatroom_settings');
         $ilDB->insert('chatroom_settings', array('room_id' => array('integer', $id), 'object_id' => array('integer', $obj_id), 'room_type' => array('text', 'default'), 'allow_anonymous' => array('integer', 0), 'allow_custom_usernames' => array('integer', 0), 'enable_history' => array('integer', 0), 'restrict_history' => array('integer', 0), 'autogen_usernames' => array('text', 'Anonymous #'), 'allow_private_rooms' => array('integer', 1)));
         $settings = new ilSetting('chatroom');
         $settings->set('public_room_ref', $ref_id);
     }
 }