Router.php

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<?php
namespace TYPO3\CMS\Backend\Routing;

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

use Psr\Http\Message\ServerRequestInterface;
use TYPO3\CMS\Backend\Routing\Exception\ResourceNotFoundException;

class Router implements \TYPO3\CMS\Core\SingletonInterface
{
    protected $routes = [];

    public function addRoute($routeIdentifier, $route)
    {
        $this->routes[$routeIdentifier] = $route;
    }

    public function getRoutes()
    {
        return $this->routes;
    }

    public function match($pathInfo)
    {
        foreach ($this->routes as $routeIdentifier => $route) {
            // This check is done in a simple way as there are no parameters yet (get parameters only)
            if ($route->getPath() === $pathInfo) {
                // Store the name of the Route in the _identifier option so the token can be checked against that
                $route->setOption('_identifier', $routeIdentifier);
                return $route;
            }
        }
        throw new ResourceNotFoundException('The requested resource "' . $pathInfo . '" was not found.', 1425389240);
    }

    public function matchRequest(ServerRequestInterface $request)
    {
        return $this->match($request->getAttribute('routePath'));
    }
}