RequestHandlerResolver.php

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<?php
 
/*
 * 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!
 */
 
namespace ‪TYPO3\CMS\Extbase\Mvc;
 
use Psr\Container\ContainerInterface;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
use ‪TYPO3\CMS\Extbase\Configuration\RequestHandlersConfiguration;
 
class ‪RequestHandlerResolver
{
    private ‪$container;
 
    private ‪$requestHandlersConfiguration;
 
    public function ‪__construct(ContainerInterface ‪$container, ‪RequestHandlersConfiguration ‪$requestHandlersConfiguration)
    {
        $this->container = ‪$container;
        $this->requestHandlersConfiguration = ‪$requestHandlersConfiguration;
    }
 
    public function ‪resolveRequestHandler(‪RequestInterface $request)
    {
        $suitableRequestHandlers = [];
        foreach ($this->requestHandlersConfiguration->getRegisteredRequestHandlers() as $requestHandlerClassName) {
            $requestHandler = $this->container->has($requestHandlerClassName)
                ? $this->container->get($requestHandlerClassName)
                : GeneralUtility::makeInstance($requestHandlerClassName)
            ;
            if ($requestHandler->canHandleRequest($request)) {
                $priority = $requestHandler->getPriority();
                if (isset($suitableRequestHandlers[$priority])) {
                    throw new ‪Exception('More than one request handler with the same priority can handle the request, but only one handler may be active at a time!', 1176475350);
                }
                $suitableRequestHandlers[$priority] = $requestHandler;
            }
        }
        if (empty($suitableRequestHandlers)) {
            throw new Exception('No suitable request handler found.', 1205414233);
        }
        ksort($suitableRequestHandlers);
        return array_pop($suitableRequestHandlers);
    }
}