public function handleExportToCockatrice()
    {
    $template = $this->createTemplate();
    $template->setFile('...');

    $cards = $this->db->table("cards");
        $cardsPath = array();
        foreach ($cards as $card) {
            $cardsPath[$card->id] = $url . "cards/" . Nette\Utils\Strings::webalize($card->name) . ".png";
        }

        $template->cardsXml = $cards;
        $template->paths = $cardsPath;

    $tmpFile = $this->context->expand('%tempDir%/cardXml/' . $this->user->id '.xml');
    $template->save($tmpFile);

    $this->sendResponse(new FileReponse($tmpFile));
    }