1 <?php

     2 

     3 /*

     4  * This file is part of the Symfony package.

     5  *

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

     7  *

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

     9  * file that was distributed with this source code.

    10  */

    11 

    12 namespace Symfony\Bundle\SecurityBundle\Templating\Helper;

    13 

    14 use Symfony\Component\Security\Acl\Voter\FieldVote;

    15 use Symfony\Component\Templating\Helper\Helper;

    16 use Symfony\Component\Security\Core\SecurityContextInterface;

    17 

    18 /**

    19  * SecurityHelper provides read-only access to the security context.

    20  *

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

    22  */

    23 class SecurityHelper extends Helper

    24 {

    25     private $context;

    26 

    27     /**

    28      * Constructor.

    29      *

    30      * @param SecurityContextInterface $context A SecurityContext instance

    31      */

    32     public function __construct(SecurityContextInterface $context = null)

    33     {

    34         $this->context = $context;

    35     }

    36 

    37     public function isGranted($role, $object = null, $field = null)

    38     {

    39         if (null === $this->context) {

    40             return false;

    41         }

    42 

    43         if (null !== $field) {

    44             $object = new FieldVote($object, $field);

    45         }

    46 

    47         return $this->context->isGranted($role, $object);

    48     }

    49 

    50     /**

    51      * Returns the canonical name of this helper.

    52      *

    53      * @return string The canonical name

    54      */

    55     public function getName()

    56     {

    57         return 'security';

    58     }

    59 }