<?php

/**

* This file is part of the FOSCommentBundle package.

*

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

*

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

* with this source code in the file LICENSE.

*/

namespace FOS\CommentBundle\Sorting;

use InvalidArgumentException;

use RuntimeException;

/**

* Sorting Factory.

*

* @author Tim Nagel <[email protected]>

*/

class SortingFactory

{

/**

* @var array of SortingInterface

*/

private $sorters;

/**

* @var string Default SortingInterface alias

*/

private $defaultSorter;

/**

* @param array $sorters An array of SortingInterfaces

* @param string $defaultSorter The alias of the sorter to use by default

*/

public function __construct(array $sorters, $defaultSorter)

{

foreach ($sorters as $alias => $sorter) {

if (!$sorter instanceof SortingInterface) {

throw new InvalidArgumentException('Sorters must implement SortingInterface');

}

$this->sorters[$alias] = $sorter;

}

$this->defaultSorter = $defaultSorter;

}

public function getSorter($alias = null)

{

if (null === $alias) {

$alias = $this->defaultSorter;

}

if (!$this->sorters[$alias]) {

throw new RuntimeException(sprintf("Unknown sorting alias '%s'", $alias));

}

return $this->sorters[$alias];

}

public function getAvailableSorters()

{

return array_keys($this->sorters);

}

}