<?php

namespace Symfony\Bundle\FrameworkBundle\HttpCache;

use Symfony\Component\HttpKernel\HttpKernelInterface;

use Symfony\Component\HttpKernel\HttpCache\HttpCache as BaseHttpCache;

use Symfony\Component\HttpKernel\HttpCache\Esi;

use Symfony\Component\HttpKernel\HttpCache\EsiResponseCacheStrategy;

use Symfony\Component\HttpKernel\HttpCache\Store;

use Symfony\Component\HttpFoundation\Request;

use Symfony\Component\HttpFoundation\Response;

/*

 * 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.

 */

/**

 *

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

 */

abstract class HttpCache extends BaseHttpCache

{

    /**

     * Constructor.

     *

     * @param HttpKernelInterface $kernel An HttpKernelInterface instance

     */

    public function __construct(HttpKernelInterface $kernel)

    {

        $store = new Store($kernel->getCacheDir().'/http_cache');

        $esi = new Esi();

        parent::__construct($kernel, $store, $esi, array_merge(array('debug' => $kernel->isDebug()), $this->getOptions()));

    }

    /**

     * Forwards the Request to the backend and returns the Response.

     *

     * @param Request  $request A Request instance

     * @param Boolean  $raw     Whether to catch exceptions or not

     * @param Response $entry   A Response instance (the stale entry if present, null otherwise)

     *

     * @return Response A Response instance

     */

    protected function forward(Request $request, $raw = false, Response $entry = null)

    {

        $this->getKernel()->boot();

        $this->getKernel()->getContainer()->set('cache', $this);

        $this->getKernel()->getContainer()->set('esi', $this->getEsi());

        return parent::forward($request, $raw, $entry);

    }

    /**

     * Returns an array of options to customize the Cache configuration.

     *

     * @return array An array of options

     */

    protected function getOptions()

    {

        return array();

    }

}