<?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\Templating;

use Symfony\Component\Templating\DelegatingEngine as BaseDelegatingEngine;

use Symfony\Component\DependencyInjection\ContainerInterface;

use Symfony\Bundle\FrameworkBundle\Templating\EngineInterface;

use Symfony\Component\HttpFoundation\Response;

/**

 * DelegatingEngine selects an engine for a given template.

 *

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

 */

class DelegatingEngine extends BaseDelegatingEngine implements EngineInterface

{

    protected $container;

    /**

     * Constructor.

     *

     * @param ContainerInterface $container The DI container

     * @param array              $engineIds An array of engine Ids

     */

    public function __construct(ContainerInterface $container, array $engineIds)

    {

        $this->container = $container;

        $this->engines = $engineIds;

    }

    /**

     * {@inheritdoc}

     */

    public function supports($name)

    {

        foreach ($this->engines as $i => $engine) {

            if (is_string($engine)) {

                $engine = $this->engines[$i] = $this->container->get($engine);

            }

            if ($engine->supports($name)) {

                return true;

            }

        }

        return false;

    }

    /**

     * {@inheritdoc}

     */

    protected function getEngine($name)

    {

        foreach ($this->engines as $i => $engine) {

            if (is_string($engine)) {

                $engine = $this->engines[$i] = $this->container->get($engine);

            }

            if ($engine->supports($name)) {

                return $engine;

            }

        }

        throw new \RuntimeException(sprintf('No engine is able to work with the template "%s".', $name));

    }

    /**

     * Renders a view and returns a Response.

     *

     * @param string   $view       The view name

     * @param array    $parameters An array of parameters to pass to the view

     * @param Response $response   A Response instance

     *

     * @return Response A Response instance

     */

    public function renderResponse($view, array $parameters = array(), Response $response = null)

    {

        if (null === $response) {

            $response = new Response();

        }

        $response->setContent($this->render($view, $parameters));

        return $response;

    }

}