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   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\Bridge\Twig\Extension;
  13  
  14  use Symfony\Component\Security\Acl\Voter\FieldVote;
  15  use Symfony\Component\Security\Core\Authorization\AuthorizationCheckerInterface;
  16  use Symfony\Component\Security\Core\Exception\AuthenticationCredentialsNotFoundException;
  17  use Twig\Extension\AbstractExtension;
  18  use Twig\TwigFunction;
  19  
  20  /**
  21   * SecurityExtension exposes security context features.
  22   *
  23   * @author Fabien Potencier <fabien@symfony.com>
  24   */
  25  class SecurityExtension extends AbstractExtension
  26  {
  27      private $securityChecker;
  28  
  29      public function __construct(AuthorizationCheckerInterface $securityChecker = null)
  30      {
  31          $this->securityChecker = $securityChecker;
  32      }
  33  
  34      public function isGranted($role, $object = null, $field = null)
  35      {
  36          if (null === $this->securityChecker) {
  37              return false;
  38          }
  39  
  40          if (null !== $field) {
  41              $object = new FieldVote($object, $field);
  42          }
  43  
  44          try {
  45              return $this->securityChecker->isGranted($role, $object);
  46          } catch (AuthenticationCredentialsNotFoundException $e) {
  47              return false;
  48          }
  49      }
  50  
  51      /**
  52       * {@inheritdoc}
  53       */
  54      public function getFunctions()
  55      {
  56          return [
  57              new TwigFunction('is_granted', [$this, 'isGranted']),
  58          ];
  59      }
  60  
  61      /**
  62       * {@inheritdoc}
  63       */
  64      public function getName()
  65      {
  66          return 'security';
  67      }
  68  }