Pagekit\Intl\Controller\IntlController::indexAction PHP Метод

    public function indexAction($locale = null)
    {
        $intl = App::module('system/intl');
        $intl->loadLocale($locale);
        $messages = $intl->getFormats($locale) ?: [];
        $messages['locale'] = $locale;
        $messages['translations'] = [$locale => App::translator()->getCatalogue($locale)->all()];
        $messages = json_encode($messages);
        $request = App::request();
        $json = $request->isXmlHttpRequest();
        $response = $json ? App::response()->json() : App::response('', 200, ['Content-Type' => 'application/javascript']);
        $response->setETag(md5($json . $messages))->setPublic();
        if ($response->isNotModified($request)) {
            return $response;
        }
        return $response->setContent($json ? $messages : sprintf('var $locale = %s;', $messages));
    }