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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;
/**
* Usually called after the route object is resolved, however, this is not possible yet as this happens
* within the RequestHandler/RouteDispatcher right now and should go away.
*
* This middleware checks for a "id" parameter. If present, it adds a site information to this page ID.
*
* Very useful for all "Web" related modules to resolve all available languages for a site.
*/
class SiteResolver implements MiddlewareInterface
{
public function __construct(
private readonly SiteMatcher $siteMatcher
) {}
/**
* Resolve the site information by checking the page ID ("id" parameter) which is typically
* used in BE modules of type "web".
*/
public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
{
$pageId = ($request->getQueryParams()['id'] ?? $request->getParsedBody()['id'] ?? 0);
if (!MathUtility::canBeInterpretedAsInteger($pageId)) {
// @todo: The "filelist" module abuses "id" to carry a storage like "1:/" around. This
// should be changed. To *always* have a site attribute attached to the request,
// we for now resolve to zero here, leading to NullSite object.
// Change "filelist" module to no longer abuse "id" GET argument and throw an
// exception here if $pageUid can not be resolved to an int.
$pageId = 0;
}
$pageId = (int)$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);
}
}