<?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\FrameworkBundle\Routing;

use Symfony\Bundle\FrameworkBundle\Controller\ControllerNameParser;

use Symfony\Component\Config\Loader\DelegatingLoader as BaseDelegatingLoader;

use Symfony\Component\Config\Loader\LoaderResolverInterface;

use Symfony\Component\HttpKernel\Log\LoggerInterface;

/**

 * DelegatingLoader delegates route loading to other loaders using a loader resolver.

 *

 * This implementation resolves the _controller attribute from the short notation

 * to the fully-qualified form (from a:b:c to class:method).

 *

 * @author Fabien Potencier <fabien@symfony.com>

 */

class DelegatingLoader extends BaseDelegatingLoader

{

    protected $parser;

    protected $logger;

    /**

     * Constructor.

     *

     * @param ControllerNameParser    $parser   A ControllerNameParser instance

     * @param LoggerInterface         $logger   A LoggerInterface instance

     * @param LoaderResolverInterface $resolver A LoaderResolverInterface instance

     */

    public function __construct(ControllerNameParser $parser, LoggerInterface $logger = null, LoaderResolverInterface $resolver)

    {

        $this->parser = $parser;

        $this->logger = $logger;

        parent::__construct($resolver);

    }

    /**

     * Loads a resource.

     *

     * @param mixed  $resource A resource

     * @param string $type     The resource type

     *

     * @return RouteCollection A RouteCollection instance

     */

    public function load($resource, $type = null)

    {

        $collection = parent::load($resource, $type);

        foreach ($collection->all() as $name => $route) {

            if ($controller = $route->getDefault('_controller')) {

                try {

                    $controller = $this->parser->parse($controller);

                } catch (\Exception $e) {

                    // unable to optimize unknown notation

                }

                $route->setDefault('_controller', $controller);

            }

        }

        return $collection;

    }

}