ClearPageCacheController.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\Controller;
 
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use TYPO3\CMS\Backend\Utility\BackendUtility;
use ‪TYPO3\CMS\Core\Authentication\BackendUserAuthentication;
use ‪TYPO3\CMS\Core\DataHandling\DataHandler;
use ‪TYPO3\CMS\Core\Http\JsonResponse;
use ‪TYPO3\CMS\Core\Localization\LanguageService;
use ‪TYPO3\CMS\Core\Type\Bitmask\Permission;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
 
class ‪ClearPageCacheController
{
    protected ‪$dataHandler;
 
    public function ‪__construct()
    {
        $this->dataHandler = GeneralUtility::makeInstance(DataHandler::class);
    }
 
    public function ‪mainAction(ServerRequestInterface $request): ResponseInterface
    {
        $parsedBody = $request->getParsedBody();
        $queryParams = $request->getQueryParams();
        $pageUid = (int)($parsedBody['id'] ?? $queryParams['id'] ?? 0);
        $message = $this->‪getLanguageService()->sL('LLL:EXT:backend/Resources/Private/Language/locallang.xlf:clearcache.message.error');
        $success = false;
        $permissionClause = $this->‪getBackendUserAuthentication()->getPagePermsClause(‪Permission::PAGE_SHOW);
        $pageRow = BackendUtility::readPageAccess($pageUid, $permissionClause);
        if ($pageUid !== 0 && $this->‪getBackendUserAuthentication()->doesUserHaveAccess($pageRow, ‪Permission::PAGE_SHOW)) {
            $this->dataHandler->start([], []);
            $this->dataHandler->clear_cacheCmd($pageUid);
            $message = $this->‪getLanguageService()->sL('LLL:EXT:backend/Resources/Private/Language/locallang.xlf:clearcache.message.success');
            $success = true;
        }
        return new JsonResponse([
            'success' => $success,
            'title' => $this->‪getLanguageService()->sL('LLL:EXT:backend/Resources/Private/Language/locallang.xlf:clearcache.title'),
            'message' => $message,
        ]);
    }
 
    protected function ‪getBackendUserAuthentication(): ‪BackendUserAuthentication
    {
        return ‪$GLOBALS['BE_USER'];
    }
 
    protected function ‪getLanguageService(): ‪LanguageService
    {
        return ‪$GLOBALS['LANG'];
    }
}