vendor/symfony/http-kernel/EventListener/LocaleListener.php line 52
- <?php
- /*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
- namespace Symfony\Component\HttpKernel\EventListener;
- use Symfony\Component\EventDispatcher\EventSubscriberInterface;
- use Symfony\Component\HttpFoundation\Request;
- use Symfony\Component\HttpFoundation\RequestStack;
- use Symfony\Component\HttpKernel\Event\FinishRequestEvent;
- use Symfony\Component\HttpKernel\Event\KernelEvent;
- use Symfony\Component\HttpKernel\Event\RequestEvent;
- use Symfony\Component\HttpKernel\KernelEvents;
- use Symfony\Component\Routing\RequestContextAwareInterface;
- /**
- * Initializes the locale based on the current request.
- *
- * @author Fabien Potencier <fabien@symfony.com>
- *
- * @final
- */
- class LocaleListener implements EventSubscriberInterface
- {
- private ?RequestContextAwareInterface $router;
- private string $defaultLocale;
- private RequestStack $requestStack;
- private bool $useAcceptLanguageHeader;
- private array $enabledLocales;
- public function __construct(RequestStack $requestStack, string $defaultLocale = 'en', RequestContextAwareInterface $router = null, bool $useAcceptLanguageHeader = false, array $enabledLocales = [])
- {
- $this->defaultLocale = $defaultLocale;
- $this->requestStack = $requestStack;
- $this->router = $router;
- $this->useAcceptLanguageHeader = $useAcceptLanguageHeader;
- $this->enabledLocales = $enabledLocales;
- }
- public function setDefaultLocale(KernelEvent $event)
- {
- $event->getRequest()->setDefaultLocale($this->defaultLocale);
- }
- public function onKernelRequest(RequestEvent $event)
- {
- $request = $event->getRequest();
- $this->setLocale($request);
- $this->setRouterContext($request);
- }
- public function onKernelFinishRequest(FinishRequestEvent $event)
- {
- if (null !== $parentRequest = $this->requestStack->getParentRequest()) {
- $this->setRouterContext($parentRequest);
- }
- }
- private function setLocale(Request $request)
- {
- if ($locale = $request->attributes->get('_locale')) {
- $request->setLocale($locale);
- } elseif ($this->useAcceptLanguageHeader) {
- if ($preferredLanguage = $request->getPreferredLanguage($this->enabledLocales)) {
- $request->setLocale($preferredLanguage);
- }
- $request->attributes->set('_vary_by_language', true);
- }
- }
- private function setRouterContext(Request $request)
- {
- $this->router?->getContext()->setParameter('_locale', $request->getLocale());
- }
- public static function getSubscribedEvents(): array
- {
- return [
- KernelEvents::REQUEST => [
- ['setDefaultLocale', 100],
- // must be registered after the Router to have access to the _locale
- ['onKernelRequest', 16],
- ],
- KernelEvents::FINISH_REQUEST => [['onKernelFinishRequest', 0]],
- ];
- }
- }