/usr/share/php/Symfony/Component/Workflow/EventListener/GuardListener.php is in php-symfony-workflow 3.4.6+dfsg-1.
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/*
* 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\Workflow\EventListener;
use Symfony\Component\Security\Core\Authentication\AuthenticationTrustResolverInterface;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use Symfony\Component\Security\Core\Authorization\AuthorizationCheckerInterface;
use Symfony\Component\Security\Core\Role\RoleHierarchyInterface;
use Symfony\Component\Validator\Validator\ValidatorInterface;
use Symfony\Component\Workflow\Event\GuardEvent;
use Symfony\Component\Workflow\Exception\InvalidTokenConfigurationException;
/**
* @author Grégoire Pineau <lyrixx@lyrixx.info>
*/
class GuardListener
{
private $configuration;
private $expressionLanguage;
private $tokenStorage;
private $authenticationChecker;
private $trustResolver;
private $roleHierarchy;
private $validator;
public function __construct($configuration, ExpressionLanguage $expressionLanguage, TokenStorageInterface $tokenStorage, AuthorizationCheckerInterface $authenticationChecker, AuthenticationTrustResolverInterface $trustResolver, RoleHierarchyInterface $roleHierarchy = null, ValidatorInterface $validator = null)
{
$this->configuration = $configuration;
$this->expressionLanguage = $expressionLanguage;
$this->tokenStorage = $tokenStorage;
$this->authenticationChecker = $authenticationChecker;
$this->trustResolver = $trustResolver;
$this->roleHierarchy = $roleHierarchy;
$this->validator = $validator;
}
public function onTransition(GuardEvent $event, $eventName)
{
if (!isset($this->configuration[$eventName])) {
return;
}
if (!$this->expressionLanguage->evaluate($this->configuration[$eventName], $this->getVariables($event))) {
$event->setBlocked(true);
}
}
// code should be sync with Symfony\Component\Security\Core\Authorization\Voter\ExpressionVoter
private function getVariables(GuardEvent $event)
{
$token = $this->tokenStorage->getToken();
if (null === $token) {
throw new InvalidTokenConfigurationException(sprintf('There are no tokens available for workflow %s.', $event->getWorkflowName()));
}
if (null !== $this->roleHierarchy) {
$roles = $this->roleHierarchy->getReachableRoles($token->getRoles());
} else {
$roles = $token->getRoles();
}
$variables = array(
'token' => $token,
'user' => $token->getUser(),
'subject' => $event->getSubject(),
'roles' => array_map(function ($role) {
return $role->getRole();
}, $roles),
// needed for the is_granted expression function
'auth_checker' => $this->authenticationChecker,
// needed for the is_* expression function
'trust_resolver' => $this->trustResolver,
// needed for the is_valid expression function
'validator' => $this->validator,
);
return $variables;
}
}
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