public function execute(HTTPRequestCustom $request)
 {
     AppContext::get_session()->csrf_get_protect();
     $news = $this->get_news($request);
     if (!$news->is_authorized_to_delete()) {
         $error_controller = PHPBoostErrors::user_not_authorized();
         DispatchManager::redirect($error_controller);
     }
     if (AppContext::get_current_user()->is_readonly()) {
         $controller = PHPBoostErrors::user_in_read_only();
         DispatchManager::redirect($controller);
     }
     NewsService::delete('WHERE id=:id', array('id' => $news->get_id()));
     NewsService::get_keywords_manager()->delete_relations($news->get_id());
     PersistenceContext::get_querier()->delete(DB_TABLE_EVENTS, 'WHERE module=:module AND id_in_module=:id', array('module' => 'news', 'id' => $news->get_id()));
     CommentsService::delete_comments_topic_module('news', $news->get_id());
     Feed::clear_cache('news');
     AppContext::get_response()->redirect($request->get_url_referrer() ? $request->get_url_referrer() : NewsUrlBuilder::home(), StringVars::replace_vars(LangLoader::get_message('news.message.success.delete', 'common', 'news'), array('name' => $news->get_name())));
 }