9.5/_site_base_redirect_resolver_8php_source.html

<?php

declare(strict_types = 1);

namespace ‪TYPO3\CMS\Frontend\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\Core\Authentication\BackendUserAuthentication;

use ‪TYPO3\CMS\Core\Http\RedirectResponse;

use ‪TYPO3\CMS\Core\Routing\SiteRouteResult;

use ‪TYPO3\CMS\Core\Site\Entity\Site;

use ‪TYPO3\CMS\Core\Site\Entity\SiteLanguage;

use ‪TYPO3\CMS\Core\Utility\GeneralUtility;

use ‪TYPO3\CMS\Frontend\Controller\ErrorController;

use ‪TYPO3\CMS\Frontend\Page\PageAccessFailureReasons;


class ‪SiteBaseRedirectResolver implements MiddlewareInterface

{

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

    {

        $site = $request->getAttribute('site', null);

        $language = $request->getAttribute('language', null);

        $routeResult = $request->getAttribute('routing', null);


        // Usually called when "https://www.example.com" was entered, but all sites have "https://www.example.com/lang-key/"

        // So a redirect to the first possible language is done.

        if ($site instanceof ‪Site && !($language instanceof ‪SiteLanguage)) {

            if ($routeResult instanceof ‪SiteRouteResult && $routeResult->‪getTail() === '') {

                $language = $site->getDefaultLanguage();

                return new ‪RedirectResponse($language->getBase(), 307);

            }

            return GeneralUtility::makeInstance(ErrorController::class)->pageNotFoundAction(

                $request,

                'The requested page does not exist',

                ['code' => ‪PageAccessFailureReasons::PAGE_NOT_FOUND]

            );

        }


        // Language is found, and hidden but also not visible to the BE user, this needs to fail

        if ($language instanceof ‪SiteLanguage && !$this->‪isLanguageEnabled($language, ‪$GLOBALS['BE_USER'] ?? null)) {

            return GeneralUtility::makeInstance(ErrorController::class)->pageNotFoundAction(

                $request,

                'Page is not available in the requested language.',

                ['code' => ‪PageAccessFailureReasons::LANGUAGE_NOT_AVAILABLE]

            );

        }


        if ($language instanceof ‪SiteLanguage && $routeResult instanceof ‪SiteRouteResult) {

            $requestedUri = $request->getUri();

            $tail = $routeResult->getTail();

            // a URL was called via "/fr-FR/" but the page is actually called "/fr-FR", let's do a redirect

            if ($tail === '/') {

                $uri = $requestedUri->withPath(rtrim($requestedUri->getPath(), '/'));

                return new ‪RedirectResponse($uri, 307);

            }

        }

        return $handler->handle($request);

    }

    protected function ‪isLanguageEnabled(‪SiteLanguage $language, ‪BackendUserAuthentication $user = null): bool

    {

        // language is hidden, check if a possible backend user is allowed to access the language

        if ($language->‪enabled() || ($user instanceof ‪BackendUserAuthentication && $user->‪checkLanguageAccess($language->‪getLanguageId()))) {

            return true;

        }

        return false;

    }

}