<?php

namespace Sensio\Bundle\FrameworkExtraBundle\Request\ParamConverter;

use Symfony\Component\HttpFoundation\Request;

/*

 * This file is part of the Symfony framework.

 *

 * (c) Fabien Potencier <fabien@symfony.com>

 *

 * This source file is subject to the MIT license that is bundled

 * with this source code in the file LICENSE.

 */

/**

 * Managers converters. 

 *

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

 * @author Henrik Bjornskov <henrik@bjrnskov.dk>

 */

class ParamConverterManager

{

    /**

     * @var array

     */

    protected $converters = array();

    /**

     * Applies all converters to the passed configurations and stops when a 

     * converter is applied it will move on to the next configuration and so on.

     *

     * @param Request $request

     * @param array|object $configurations

     */

    public function apply(Request $request, $configurations)

    {

        if (is_object($configurations)) {

            $configurations = array($configurations);

        }

        foreach ($configurations as $configuration) {

            foreach ($this->all() as $converter) {

                if ($converter->supports($configuration)) {

                    if ($request->attributes->has($configuration->getName())) {

                        continue 2;

                    }

                    $converter->apply($request, $configuration);

                }

            }

        }

   }

   /**

    * Adds a parameter converter.

    *

    * @param ParamConverterInterface $converter A ParamConverterInterface instance

    * @param integer                 $priority  The priority (between -10 and 10)

    */

    public function add(ParamConverterInterface $converter, $priority = 0)

    {

       if (!isset($this->converters[$priority])) {

           $this->converters[$priority] = array();

       }

       $this->converters[$priority][] = $converter;

    }

   /**

    * Returns all registered param converters.

    *

    * @return array An array of param converters

    */

   public function all()

   {

       krsort($this->converters);

       $converters = array();

       foreach ($this->converters as $all) {

           $converters = array_merge($converters, $all);

       }

       return $converters;

   }

}