SiteResolver.php

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<?php
 
declare(strict_types=1);
 
/*
 * 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\Backend\Middleware;
 
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\MathUtility;
 
class ‪SiteResolver implements MiddlewareInterface
{
    protected ‪$siteMatcher;
 
    public function ‪__construct(‪SiteMatcher ‪$siteMatcher)
    {
        $this->siteMatcher = ‪$siteMatcher;
    }
 
    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 = $this->siteMatcher->matchByPageId($pageId, $rootLine);
            $request = $request->withAttribute('site', $site);
        }
        return $handler->handle($request);
    }
}