<?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\Security\Http;

use Symfony\Component\HttpKernel\HttpKernelInterface;

use Symfony\Component\HttpKernel\Event\GetResponseEvent;

use Symfony\Component\HttpFoundation\Request;

use Symfony\Component\EventDispatcher\EventDispatcherInterface;

/**

 * Firewall uses a FirewallMap to register security listeners for the given

 * request.

 *

 * It allows for different security strategies within the same application

 * (a Basic authentication for the /api, and a web based authentication for

 * everything else for instance).

 *

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

 */

class Firewall

{

    private $map;

    private $dispatcher;

    /**

     * Constructor.

     *

     * @param FirewallMap              $map        A FirewallMap instance

     * @param EventDispatcherInterface $dispatcher An EventDispatcherInterface instance

     */

    public function __construct(FirewallMapInterface $map, EventDispatcherInterface $dispatcher)

    {

        $this->map = $map;

        $this->dispatcher = $dispatcher;

    }

    /**

     * Handles security.

     *

     * @param GetResponseEvent $event An GetResponseEvent instance

     */

    public function onKernelRequest(GetResponseEvent $event)

    {

        if (HttpKernelInterface::MASTER_REQUEST !== $event->getRequestType()) {

            return;

        }

        // register listeners for this firewall

        list($listeners, $exception) = $this->map->getListeners($event->getRequest());

        if (null !== $exception) {

            $exception->register($this->dispatcher);

        }

        // initiate the listener chain

        foreach ($listeners as $listener) {

            $response = $listener->handle($event);

            if ($event->hasResponse()) {

                break;

            }

        }

    }

}