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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;
/**
* Allows to clear the page cache of a given page uid.
*
* @internal This class is a specific Backend controller implementation and is not part of the TYPO3's Core API.
*/
class ClearPageCacheController
{
/**
* @var DataHandler
*/
protected $dataHandler;
public function __construct()
{
$this->dataHandler = GeneralUtility::makeInstance(DataHandler::class);
}
/**
* Clear page cache
*/
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'];
}
}