<?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\Acl\Domain;

use Symfony\Component\Security\Acl\Model\AclProviderInterface;

use Symfony\Component\Security\Acl\Model\ObjectIdentityRetrievalStrategyInterface;

use Symfony\Component\Security\Acl\Model\SecurityIdentityRetrievalStrategyInterface;

/**

 * This service caches ACLs for an entire collection of objects.

 *

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

 */

class AclCollectionCache

{

    private $aclProvider;

    private $objectIdentityRetrievalStrategy;

    private $securityIdentityRetrievalStrategy;

    /**

     * Constructor.

     *

     * @param AclProviderInterface              $aclProvider

     * @param ObjectIdentityRetrievalStrategy   $oidRetrievalStrategy

     * @param SecurityIdentityRetrievalStrategy $sidRetrievalStrategy

     * @return void

     */

    public function __construct(AclProviderInterface $aclProvider, ObjectIdentityRetrievalStrategyInterface $oidRetrievalStrategy, SecurityIdentityRetrievalStrategyInterface $sidRetrievalStrategy)

    {

        $this->aclProvider = $aclProvider;

        $this->objectIdentityRetrievalStrategy = $oidRetrievalStrategy;

        $this->securityIdentityRetrievalStrategy = $sidRetrievalStrategy;

    }

    /**

     * Batch loads ACLs for an entire collection; thus, it reduces the number

     * of required queries considerably.

     *

     * @param mixed $collection anything that can be passed to foreach()

     * @param array $tokens an array of TokenInterface implementations

     * @return void

     */

    public function cache($collection, array $tokens = array())

    {

        $sids = array();

        foreach ($tokens as $token) {

            $sids = array_merge($sids, $this->securityIdentityRetrievalStrategy->getSecurityIdentities($token));

        }

        $oids = array();

        foreach ($collection as $domainObject) {

            $oids[] = $this->objectIdentityRetrievalStrategy->getObjectIdentity($domainObject);

        }

        $this->aclProvider->findAcls($oids, $sids);

    }

}