9.5/backend_2_classes_2_middleware_2_site_resolver_8php_source.html

<?php

declare(strict_types = 1);

namespace ‪TYPO3\CMS\Backend\Middleware;


/*

 * 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\ResponseInterface;

use Psr\Http\Message\ServerRequestInterface;

use Psr\Http\Server\MiddlewareInterface;

use Psr\Http\Server\RequestHandlerInterface;

use ‪TYPO3\CMS\Backend\Utility\BackendUtility;

use ‪TYPO3\CMS\Core\Routing\SiteMatcher;

use ‪TYPO3\CMS\Core\Utility\GeneralUtility;

use ‪TYPO3\CMS\Core\Utility\MathUtility;


class ‪SiteResolver implements MiddlewareInterface

{

    public function ‪process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface

    {

        $pageId = ($request->getQueryParams()['id'] ?? $request->getParsedBody()['id'] ?? 0);

        // Check if we have a numeric _GET/_POST parameter for "id", then a site information can be resolved based.

        if (‪MathUtility::canBeInterpretedAsInteger($pageId)) {

            $pageId = (int)$pageId;

            $rootLine = null;

            if ($pageId > 0) {

                $rootLine = ‪BackendUtility::BEgetRootLine($pageId);

            }

            $site = GeneralUtility::makeInstance(SiteMatcher::class)->matchByPageId($pageId, $rootLine);

            $request = $request->withAttribute('site', $site);

            ‪$GLOBALS['TYPO3_REQUEST'] = $request;

        }

        return $handler->handle($request);

    }

}