LocaleAwareListener.php

<?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\RequestStack;
use Symfony\Component\HttpKernel\Event\FinishRequestEvent;
use Symfony\Component\HttpKernel\Event\RequestEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Contracts\Translation\LocaleAwareInterface;

/**
 * Pass the current locale to the provided services.
 *
 * @author Pierre Bobiet <pierrebobiet@gmail.com>
 */
class LocaleAwareListener implements EventSubscriberInterface {
    
    /**
     * @param iterable<mixed, LocaleAwareInterface> $localeAwareServices
     */
    public function __construct(iterable $localeAwareServices, RequestStack $requestStack) {
    }
    public function onKernelRequest(RequestEvent $event) : void {
        $this->setLocale($event->getRequest()
            ->getLocale(), $event->getRequest()
            ->getDefaultLocale());
    }
    public function onKernelFinishRequest(FinishRequestEvent $event) : void {
        if (null === ($parentRequest = $this->requestStack
            ->getParentRequest())) {
            foreach ($this->localeAwareServices as $service) {
                $service->setLocale($event->getRequest()
                    ->getDefaultLocale());
            }
            return;
        }
        $this->setLocale($parentRequest->getLocale(), $parentRequest->getDefaultLocale());
    }
    public static function getSubscribedEvents() : array {
        return [
            // must be registered after the Locale listener
KernelEvents::REQUEST => [
                [
                    'onKernelRequest',
                    15,
                ],
            ],
            KernelEvents::FINISH_REQUEST => [
                [
                    'onKernelFinishRequest',
                    -15,
                ],
            ],
        ];
    }
    private function setLocale(string $locale, string $defaultLocale) : void {
        foreach ($this->localeAwareServices as $service) {
            try {
                $service->setLocale($locale);
            } catch (\InvalidArgumentException) {
                $service->setLocale($defaultLocale);
            }
        }
    }

}