/**
* Closes all marked threads.
*/
public function closeAll()
{
list($boards, $boardIDs) = ThreadEditor::getBoards($this->threadIDs);
// check permissions
foreach ($boards as $board) {
$board->checkModeratorPermission('canCloseThread');
}
ThreadEditor::closeAll($this->threadIDs);
ThreadEditor::unmarkAll();
HeaderUtil::redirect($this->url);
exit;
}