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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\Fluid\Core\ViewHelper;
use Psr\Container\ContainerInterface;
use Psr\Http\Message\ServerRequestInterface;
use TYPO3\CMS\Core\Authentication\BackendUserAuthentication;
use TYPO3\CMS\Core\DependencyInjection\FailsafeContainer;
use TYPO3\CMS\Core\Http\ApplicationType;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3Fluid\Fluid\Core\ViewHelper\ViewHelperInterface;
/**
* Class ViewHelperResolver
*
* Class whose purpose is dedicated to resolving classes which
* can be used as ViewHelpers and ExpressionNodes in Fluid.
*
* This CMS-specific version of the ViewHelperResolver works
* almost exactly like the one from Fluid itself, with the main
* differences being that this one supports a legacy mode flag
* which when toggled on makes the Fluid parser behave exactly
* like it did in the legacy CMS Fluid package.
*
* In addition to modifying the behavior or the parser when
* legacy mode is requested, this ViewHelperResolver is also
* made capable of "mixing" two different ViewHelper namespaces
* to effectively create aliases for the Fluid core ViewHelpers
* to be loaded in the TYPO3\CMS\ViewHelpers scope as well.
*
* Default ViewHelper namespaces are read TYPO3 configuration at:
*
* $GLOBALS['TYPO3_CONF_VARS']['SYS']['fluid']['namespaces']
*
* Extending this array allows third party ViewHelper providers
* to automatically add or extend namespaces which then become
* available in every Fluid template file without having to
* register the namespace.
*
* @internal This is a helper class which is not considered part of TYPO3's Public API.
*/
class ViewHelperResolver extends \TYPO3Fluid\Fluid\Core\ViewHelper\ViewHelperResolver
{
protected ContainerInterface $container;
/**
* ViewHelperResolver constructor
*
* Loads namespaces defined in global TYPO3 configuration. Overlays `f:`
* with `f:debug:` when Fluid debugging is enabled in the admin panel,
* causing debugging-specific ViewHelpers to be resolved in that case.
*
* @internal constructor, use `ViewHelperResolverFactory->create()` instead
*/
public function __construct(ContainerInterface $container, array $namespaces)
{
$this->container = $container;
$this->namespaces = $namespaces;
if (($GLOBALS['TYPO3_REQUEST'] ?? null) instanceof ServerRequestInterface
&& ApplicationType::fromRequest($GLOBALS['TYPO3_REQUEST'])->isFrontend()
&& $this->getBackendUser() instanceof BackendUserAuthentication
) {
if ($this->getBackendUser()->uc['AdminPanel']['preview_showFluidDebug'] ?? false) {
$this->namespaces['f'][] = 'TYPO3\\CMS\\Fluid\\ViewHelpers\\Debug';
}
}
}
/**
* @param string $viewHelperClassName
*/
public function createViewHelperInstanceFromClassName($viewHelperClassName): ViewHelperInterface
{
if ($this->container instanceof FailsafeContainer) {
// The install tool creates VH instances using makeInstance to not rely on symfony DI here,
// otherwise we'd have to have all install-tool used ones in ServiceProvider.php. However,
// none of the install tool used VH's use injection.
/** @var ViewHelperInterface $viewHelperInstance */
$viewHelperInstance = GeneralUtility::makeInstance($viewHelperClassName);
return $viewHelperInstance;
}
if ($this->container->has($viewHelperClassName)) {
/** @var ViewHelperInterface $viewHelperInstance */
$viewHelperInstance = $this->container->get($viewHelperClassName);
} else {
/** @var ViewHelperInterface $viewHelperInstance */
$viewHelperInstance = new $viewHelperClassName();
}
return $viewHelperInstance;
}
protected function getBackendUser(): ?BackendUserAuthentication
{
return $GLOBALS['BE_USER'] ?? null;
}
}