<?php

/*

 * This file is part of the FOSUserBundle package.

 *

 * (c) FriendsOfSymfony <http://friendsofsymfony.github.com/>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace FOS\UserBundle\Security\Encoder;

use FOS\UserBundle\Model\UserInterface;

use Symfony\Component\Security\Core\Encoder\EncoderFactoryInterface;

use Symfony\Component\Security\Core\User\UserInterface as SecurityUserInterface;

/**

 * This factory assumes MessageDigestPasswordEncoder's constructor.

 *

 * @author Johannes M. Schmitt <schmittjoh@gmail.com>

 * @author Jeremy Mikola <jmikola@gmail.com>

 */

class EncoderFactory implements EncoderFactoryInterface

{

    protected $encoders;

    protected $encoderClass;

    protected $encodeHashAsBase64;

    protected $iterations;

    protected $genericFactory;

    /**

     * Constructor.

     *

     * @param string $encoderClass Encoder class

     * @param Boolean $encodeHashAsBase64

     * @param integer $iterations

     * @param EncoderFactoryInterface $genericFactory

     */

    public function __construct($encoderClass, $encodeHashAsBase64, $iterations, EncoderFactoryInterface $genericFactory)

    {

        $this->encoders = array();

        $this->encoderClass = $encoderClass;

        $this->encodeHashAsBase64 = $encodeHashAsBase64;

        $this->iterations = $iterations;

        $this->genericFactory = $genericFactory;

    }

    /**

     * @see Symfony\Component\Security\Core\Encoder\EncoderFactory::getEncoder()

     */

    public function getEncoder(SecurityUserInterface $user)

    {

        if (!$user instanceof UserInterface) {

            return $this->genericFactory->getEncoder($user);

        }

        if (isset($this->encoders[$algorithm = $user->getAlgorithm()])) {

            return $this->encoders[$algorithm];

        }

        return $this->encoders[$algorithm] = $this->createEncoder($algorithm);

    }

    /**

     * Creates an encoder for the given algorithm.

     *

     * @param string $algorithm

     * @return PasswordEncoderInterface

     */

    protected function createEncoder($algorithm)

    {

        $class = $this->encoderClass;

        return new $class(

            $algorithm,

            $this->encodeHashAsBase64,

            $this->iterations

        );

    }

}