abienvenu/Kyela

<?php
/*
 * Copyright 2014-2018 Arnaud Bienvenu
 *
 * This file is part of Kyela.

 * Kyela is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.

 * Kyela is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.

 * You should have received a copy of the GNU Affero General Public License
 * along with Kyela.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

namespace Abienvenu\KyelaBundle\EventListener;

use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

class LocaleListener implements EventSubscriberInterface
{
    private $defaultLocale;

    public function __construct($defaultLocale)
    {
        $this->defaultLocale = $defaultLocale;
    }

    public function onKernelRequest(GetResponseEvent $event)
    {
        $request = $event->getRequest();

        // try to see if the locale has been set as a _locale routing parameter
        $locale = $request->attributes->get('_locale');
        if ($locale) {
            $request->getSession()->set('_locale', $locale);
        } else if ($request->getSession()) {
            // if no explicit locale has been set on this request, use one from the session
            $request->setLocale($request->getSession()->get('_locale', $this->defaultLocale));
        } else {
            $request->setLocale($this->defaultLocale);
        }
    }

    public static function getSubscribedEvents()
    {
        return [
            // must be registered before the default Locale listener
            KernelEvents::REQUEST => [['onKernelRequest', 17]],
        ];
    }
}