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Filename : ErrorsLoggerListener.php

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<?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 Psr\Log\LoggerInterface;
use Symfony\Component\HttpKernel\Debug\ErrorHandler;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\KernelEvents;

/**
 * Injects the logger into the ErrorHandler, so that it can log various errors.
 *
 * @author Colin Frei <colin@colinfrei.com>
 * @author Konstantin Myakshin <koc-dp@yandex.ru>
 */
class ErrorsLoggerListener implements EventSubscriberInterface
{
    private $channel;

    private $logger;

    public function __construct($channel, LoggerInterface $logger = null)
    {
        $this->channel = $channel;
        $this->logger = $logger;
    }

    public function injectLogger()
    {
        if (null !== $this->logger) {
            ErrorHandler::setLogger($this->logger, $this->channel);
        }
    }

    public static function getSubscribedEvents()
    {
        return array(KernelEvents::REQUEST => 'injectLogger');
    }
}