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AuthenticatedVoter.php
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ExpressionVoter.php
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Code Editor : ExpressionVoter.php
<?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\Core\Authorization\Voter; use Symfony\Component\Security\Core\Authentication\Token\TokenInterface; use Symfony\Component\Security\Core\Authentication\AuthenticationTrustResolverInterface; use Symfony\Component\Security\Core\Authorization\ExpressionLanguage; use Symfony\Component\Security\Core\Role\RoleHierarchyInterface; use Symfony\Component\ExpressionLanguage\Expression; use Symfony\Component\HttpFoundation\Request; /** * ExpressionVoter votes based on the evaluation of an expression. * * @author Fabien Potencier <fabien@symfony.com> */ class ExpressionVoter implements VoterInterface { private $expressionLanguage; private $trustResolver; private $roleHierarchy; /** * Constructor. * * @param ExpressionLanguage $expressionLanguage */ public function __construct(ExpressionLanguage $expressionLanguage, AuthenticationTrustResolverInterface $trustResolver, RoleHierarchyInterface $roleHierarchy = null) { $this->expressionLanguage = $expressionLanguage; $this->trustResolver = $trustResolver; $this->roleHierarchy = $roleHierarchy; } /** * {@inheritdoc} */ public function supportsAttribute($attribute) { return $attribute instanceof Expression; } /** * {@inheritdoc} */ public function supportsClass($class) { return true; } /** * {@inheritdoc} */ public function vote(TokenInterface $token, $object, array $attributes) { $result = VoterInterface::ACCESS_ABSTAIN; $variables = null; foreach ($attributes as $attribute) { if (!$this->supportsAttribute($attribute)) { continue; } if (null === $variables) { $variables = $this->getVariables($token, $object); } $result = VoterInterface::ACCESS_DENIED; if ($this->expressionLanguage->evaluate($attribute, $variables)) { return VoterInterface::ACCESS_GRANTED; } } return $result; } private function getVariables(TokenInterface $token, $object) { if (null !== $this->roleHierarchy) { $roles = $this->roleHierarchy->getReachableRoles($token->getRoles()); } else { $roles = $token->getRoles(); } $variables = array( 'token' => $token, 'user' => $token->getUser(), 'object' => $object, 'roles' => array_map(function ($role) { return $role->getRole(); }, $roles), 'trust_resolver' => $this->trustResolver, ); // this is mainly to propose a better experience when the expression is used // in an access control rule, as the developer does not know that it's going // to be handled by this voter if ($object instanceof Request) { $variables['request'] = $object; } return $variables; } }
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