Symfony Profiler

<?php
namespace App\EventSubscriber;
use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
use Symfony\Component\HttpKernel\Event\FilterControllerEvent;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\HttpKernel\KernelInterface;
use Symfony\Component\HttpKernel\Event\RequestEvent;
use Negotiation\LanguageNegotiator;
use Symfony\Component\HttpFoundation\RedirectResponse;
class LanguageListener implements EventSubscriberInterface
{
private $supportedLanguages;
public function __construct(string $supportedLanguages)
{
$supportedLanguages = explode('|', $supportedLanguages);
if (empty($supportedLanguages)) {
throw new \InvalidArgumentException('At least one supported language must be given.');
}
$this->supportedLanguages = $supportedLanguages;
}
public static function getSubscribedEvents()
{
return [
KernelEvents::REQUEST => ['redirectToLocalizedHomepage', 100],
];
}
public function redirectToLocalizedHomepage(RequestEvent $event)
{
// Do not modify sub-requests
if (KernelInterface::MASTER_REQUEST !== $event->getRequestType()) {
return;
}
// Assume all routes except the frontpage use the _locale parameter
if ($event->getRequest()->getPathInfo() !== '/') {
return;
}
$language = $this->supportedLanguages[0];
if (null !== $acceptLanguage = $event->getRequest()->headers->get('Accept-Language')) {
$negotiator = new LanguageNegotiator();
$best = $negotiator->getBest(
$event->getRequest()->headers->get('Accept-Language'),
$this->supportedLanguages
);
if (null !== $best) {
$language = $best->getType();
}
}
$response = new RedirectResponse('/' . $language);
$event->setResponse($response);
}
}

src/EventSubscriber/LanguageListener.php line 36