vendor/symfony/monolog-bundle/DependencyInjection/MonologExtension.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\Bundle\MonologBundle\DependencyInjection;

use Symfony\Component\HttpKernel\DependencyInjection\Extension;
use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\Config\FileLocator;
use Symfony\Component\DependencyInjection\Definition;
use Symfony\Component\DependencyInjection\Reference;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Elastica\Client;

/**
 * MonologExtension is an extension for the Monolog library.
 *
 * @author Jordi Boggiano <j.boggiano@seld.be>
 * @author Christophe Coevoet <stof@notk.org>
 */
class MonologExtension extends Extension
{
    private $nestedHandlers = array();

    private $swiftMailerHandlers = array();

    private function levelToMonologConst($level)
    {
        return is_int($level) ? $level : constant('Monolog\Logger::'.strtoupper($level));
    }

    /**
     * Loads the Monolog configuration.
     *
     * @param array            $configs   An array of configuration settings
     * @param ContainerBuilder $container A ContainerBuilder instance
     */
    public function load(array $configs, ContainerBuilder $container)
    {
        $configuration = $this->getConfiguration($configs, $container);
        $config = $this->processConfiguration($configuration, $configs);


        if (isset($config['handlers'])) {
            $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
            $loader->load('monolog.xml');

            $container->setParameter('monolog.use_microseconds', $config['use_microseconds']);

            // always autowire the main logger, require Symfony >= 2.8, < 3.3
            if (!method_exists('Symfony\Component\DependencyInjection\ContainerBuilder', 'fileExists') && method_exists('Symfony\Component\DependencyInjection\Definition', 'addAutowiringType')) {
                $container->getDefinition('monolog.logger')->addAutowiringType('Psr\Log\LoggerInterface');