private function coverParams()
{
if (isset($this->params['cover']) === false) {
$this->params['cover'] = get_params(Request::all(), 'forum_cover', ['forum_id:int', 'main_cover.cover_file:file', 'main_cover._delete:bool', 'default_topic_cover.cover_file:file', 'default_topic_cover._delete:bool']);
$this->params['cover']['user_id'] = Auth::user()->user_id;
}
return $this->params['cover'];
}