src/Utils/Listeners/LocaleListener.php line 41

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  1. <?php
  3. namespace App\Utils\Listeners;
  5. use Symfony\Component\HttpFoundation\RedirectResponse;
  6. use Symfony\Component\Routing\RouterInterface;
  7. use Symfony\Component\HttpKernel\Event\GetResponseEvent;
  8. use Symfony\Component\HttpKernel\KernelEvents;
  9. use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  10. use Symfony\Component\Routing\Matcher\UrlMatcher;
  11. use Symfony\Component\Routing\Matcher\UrlMatcherInterface;
  12. use Symfony\Component\Routing\RequestContext;
  13. use Symfony\Component\HttpKernel\Event\RequestEvent;
  15. class LocaleListener implements EventSubscriberInterface
  16. {
  18.     /**
  19.     * @var routeCollection \Symfony\Component\Routing\RouteCollection
  20.     */
  21.     private $routeCollection;
  23.     /**
  24.     * @var urlMatcher \Symfony\Component\Routing\Matcher\UrlMatcher;
  25.     */
  26.     private $urlMatcher;
  27.     private $oldUrl;
  28.     private $newUrl;
  29.     private $languages;
  30.     private $defaultLanguage;
  32.     public function __construct(RouterInterface $router, UrlMatcherInterface $urlMatcher)
  33.     {
  34.         $this->routeCollection = $router->getRouteCollection();
  35.         $this->languages = ["en","ar"];
  36.         $this->defaultLanguage = "en";
  37.         $context = new RequestContext("/");
  38.         $this->urlMatcher = $urlMatcher;
  39.     }
  41.     public function onKernelRequest(RequestEvent $event)
  42.     {
  43.         //GOAL:
  44.         // Redirect all incoming requests to their /locale/route equivalent when exists.
  45.         // Do nothing if it already has /locale/ in the route to prevent redirect loops
  46.         // Do nothing if the route requested has no locale param
  47.         $request = $event->getRequest();
  48.         $this->newUrl  = $request->getPathInfo();
  49.         $this->oldUrl = $request->headers->get('referer');
  50.         $locale = $this->checkLanguage();
  51.         if ($locale === null) {
  52.             return;
  53.         }
  54.         
  55.         $request->setLocale($locale);
  57.         $pathLocale = "/".$locale.$this->newUrl;
  58.         //We have to catch the ResourceNotFoundException
  59.         try {
  60.             //Try to match the path with the local prefix
  61.             $this->urlMatcher->match($pathLocale);
  62.             $event->setResponse(new RedirectResponse($pathLocale));
  63.         } catch (\Symfony\Component\Routing\Exception\ResourceNotFoundException $e) {
  64.         } catch (\Symfony\Component\Routing\Exception\MethodNotAllowedException $e) {
  65.         }
  66.     }
  67.     private function checkLanguage()
  68.     {
  69.         foreach ($this->languages as $language) {
  70.             if (preg_match_all("/\/$language\//", $this->newUrl)) {
  71.                 return null;
  72.             }
  73.             if (preg_match_all("/\/$language\//", $this->oldUrl)) {
  74.                 return $language;
  75.             }
  76.         }
  78.         return $this->defaultLanguage;
  79.     }
  80.     public static function getSubscribedEvents()
  81.     {
  82.         return array(
  83.             // must be registered before the default Locale listener
  84.             KernelEvents::REQUEST => array(array('onKernelRequest', 17)),
  85.         );
  86.     }
  87. }