[BUGFIX] Use late static binding for compilable viewhelpers
[Packages/TYPO3.CMS.git] / typo3 / sysext / belog / Classes / ViewHelpers / IsExtensionLoadedViewHelper.php
1 <?php
2 namespace TYPO3\CMS\Belog\ViewHelpers;
3
4 /*
5 * This file is part of the TYPO3 CMS project.
6 *
7 * It is free software; you can redistribute it and/or modify it under
8 * the terms of the GNU General Public License, either version 2
9 * of the License, or any later version.
10 *
11 * For the full copyright and license information, please read the
12 * LICENSE.txt file that was distributed with this source code.
13 *
14 * The TYPO3 project - inspiring people to share!
15 */
16
17 use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
18 use TYPO3\CMS\Fluid\Core\Rendering\RenderingContextInterface;
19 use TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper;
20 use TYPO3\CMS\Fluid\Core\ViewHelper\Facets\CompilableInterface;
21
22 /**
23 * Returns true, if a specific extension is loaded
24 *
25 * @author Christian Kuhn <lolli@schwarzbu.ch>
26 * @internal
27 */
28 class IsExtensionLoadedViewHelper extends AbstractViewHelper implements CompilableInterface {
29
30 /**
31 * Checks whether an extension is loaded.
32 *
33 * @param string $extensionKey The extension's key
34 * @return bool TRUE if extension is loaded, FALSE otherwise
35 */
36 public function render($extensionKey) {
37 return static::renderStatic(
38 array(
39 'extensionKey' => $extensionKey
40 ),
41 $this->buildRenderChildrenClosure(),
42 $this->renderingContext
43 );
44 }
45
46 /**
47 * @param array $arguments
48 * @param callable $renderChildrenClosure
49 * @param RenderingContextInterface $renderingContext
50 *
51 * @return string
52 */
53 static public function renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext) {
54 return ExtensionManagementUtility::isLoaded($arguments['extensionKey']);
55 }
56
57 }