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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\Component\Security\Core\Authorization;

use Symfony\Component\Security\Core\Authentication\AuthenticationManagerInterface;
use Symfony\Component\Security\Core\Authentication\Token\NullToken;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use Symfony\Component\Security\Core\Exception\AuthenticationCredentialsNotFoundException;

/**
 * AuthorizationChecker is the main authorization point of the Security component.
 *
 * It gives access to the token representing the current user authentication.
 *
 * @author Fabien Potencier <[email protected]>
 * @author Johannes M. Schmitt <[email protected]>
 */
class AuthorizationChecker implements AuthorizationCheckerInterface
{
    private $tokenStorage;
    private $accessDecisionManager;
    private $authenticationManager;
    private $alwaysAuthenticate;
    private $exceptionOnNoToken;

    public function __construct(TokenStorageInterface $tokenStorage, /* AccessDecisionManagerInterface */ $accessDecisionManager, /* bool */ $alwaysAuthenticate = false, /* bool */ $exceptionOnNoToken = true)
    {
        if ($accessDecisionManager instanceof AuthenticationManagerInterface) {
            trigger_deprecation('symfony/security-core', '5.4', 'The $autenticationManager argument of "%s" is deprecated.', __METHOD__);

            $this->authenticationManager = $accessDecisionManager;
            $accessDecisionManager = $alwaysAuthenticate;
            $alwaysAuthenticate = $exceptionOnNoToken;
            $exceptionOnNoToken = \func_num_args() > 4 ? func_get_arg(4) : true;
        }

        if (false !== $alwaysAuthenticate) {
            trigger_deprecation('symfony/security-core', '5.4', 'Not setting the 4th argument of "%s" to "false" is deprecated.', __METHOD__);
        }
        if (false !== $exceptionOnNoToken) {
            trigger_deprecation('symfony/security-core', '5.4', 'Not setting the 5th argument of "%s" to "false" is deprecated.', __METHOD__);
        }

        if (!$accessDecisionManager instanceof AccessDecisionManagerInterface) {
            throw new \TypeError(sprintf('Argument 2 of "%s" must be instance of "%s", "%s" given.', __METHOD__, AccessDecisionManagerInterface::class, get_debug_type($accessDecisionManager)));
        }

        $this->tokenStorage = $tokenStorage;
        $this->accessDecisionManager = $accessDecisionManager;
        $this->alwaysAuthenticate = $alwaysAuthenticate;
        $this->exceptionOnNoToken = $exceptionOnNoToken;
    }

    /**
     * {@inheritdoc}
     *
     * @throws AuthenticationCredentialsNotFoundException when the token storage has no authentication token and $exceptionOnNoToken is set to true
     */
    final public function isGranted($attribute, $subject = null): bool
    {
        $token = $this->tokenStorage->getToken();

        if (!$token || !$token->getUser()) {
            if ($this->exceptionOnNoToken) {
                throw new AuthenticationCredentialsNotFoundException('The token storage contains no authentication token. One possible reason may be that there is no firewall configured for this URL.');
            }

            $token = new NullToken();
        } else {
            $authenticated = true;
            // @deprecated since Symfony 5.4
            if ($this->alwaysAuthenticate || !$authenticated = $token->isAuthenticated(false)) {
                if (!($authenticated ?? true)) {
                    trigger_deprecation('symfony/core', '5.4', 'Returning false from "%s::isAuthenticated()" is deprecated, return null from "getUser()" instead.', get_debug_type($token));
                }
                $this->tokenStorage->setToken($token = $this->authenticationManager->authenticate($token));
            }
        }

        return $this->accessDecisionManager->decide($token, [$attribute], $subject);
    }
}