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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Bridge\Twig\Extension;

use Symfony\Component\Security\Acl\Voter\FieldVote;
use Symfony\Component\Security\Core\Authorization\AuthorizationCheckerInterface;
use Symfony\Component\Security\Core\Exception\AuthenticationCredentialsNotFoundException;
use Symfony\Component\Security\Http\Impersonate\ImpersonateUrlGenerator;
use Twig\Extension\AbstractExtension;
use Twig\TwigFunction;

/**
 * SecurityExtension exposes security context features.
 *
 * @author Fabien Potencier <[email protected]>
 */
final class SecurityExtension extends AbstractExtension
{
    private $securityChecker;

    private $impersonateUrlGenerator;

    public function __construct(?AuthorizationCheckerInterface $securityChecker = null, ?ImpersonateUrlGenerator $impersonateUrlGenerator = null)
    {
        $this->securityChecker = $securityChecker;
        $this->impersonateUrlGenerator = $impersonateUrlGenerator;
    }

    /**
     * @param mixed $object
     */
    public function isGranted($role, $object = null, ?string $field = null): bool
    {
        if (null === $this->securityChecker) {
            return false;
        }

        if (null !== $field) {
            $object = new FieldVote($object, $field);
        }

        try {
            return $this->securityChecker->isGranted($role, $object);
        } catch (AuthenticationCredentialsNotFoundException $e) {
            return false;
        }
    }

    public function getImpersonateExitUrl(?string $exitTo = null): string
    {
        if (null === $this->impersonateUrlGenerator) {
            return '';
        }

        return $this->impersonateUrlGenerator->generateExitUrl($exitTo);
    }

    public function getImpersonateExitPath(?string $exitTo = null): string
    {
        if (null === $this->impersonateUrlGenerator) {
            return '';
        }

        return $this->impersonateUrlGenerator->generateExitPath($exitTo);
    }

    /**
     * {@inheritdoc}
     */
    public function getFunctions(): array
    {
        return [
            new TwigFunction('is_granted', [$this, 'isGranted']),
            new TwigFunction('impersonation_exit_url', [$this, 'getImpersonateExitUrl']),
            new TwigFunction('impersonation_exit_path', [$this, 'getImpersonateExitPath']),
        ];
    }
}