ClearCacheToolbarItem.php

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<?php
 
/*
 * 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\Backend\ToolbarItems;
 
use ‪TYPO3\CMS\Backend\Routing\UriBuilder;
use ‪TYPO3\CMS\Backend\Toolbar\ClearCacheActionsHookInterface;
use ‪TYPO3\CMS\Backend\Toolbar\ToolbarItemInterface;
use ‪TYPO3\CMS\Core\Authentication\BackendUserAuthentication;
use ‪TYPO3\CMS\Core\Page\PageRenderer;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
use ‪TYPO3\CMS\Fluid\View\StandaloneView;
 
class ‪ClearCacheToolbarItem implements ‪ToolbarItemInterface
{
    protected ‪$cacheActions = [];
 
    protected ‪$optionValues = [];
 
    public function ‪__construct()
    {
        $this->‪getPageRenderer()->‪loadRequireJsModule('TYPO3/CMS/Backend/Toolbar/ClearCacheMenu');
        $isAdmin = $this->‪getBackendUser()->‪isAdmin();
        $userTsConfig = $this->‪getBackendUser()->‪getTSConfig();
        $uriBuilder = GeneralUtility::makeInstance(UriBuilder::class);
 
        // Clear all page-related caches
        if ($isAdmin || $userTsConfig['options.']['clearCache.']['pages'] ?? false) {
            $this->cacheActions[] = [
                'id' => 'pages',
                'title' => 'LLL:EXT:core/Resources/Private/Language/locallang_core.xlf:flushPageCachesTitle',
                'description' => 'LLL:EXT:core/Resources/Private/Language/locallang_core.xlf:flushPageCachesDescription',
                'href' => (string)$uriBuilder->buildUriFromRoute('tce_db', ['cacheCmd' => 'pages']),
                'iconIdentifier' => 'actions-system-cache-clear-impact-low'
            ];
            $this->optionValues[] = 'pages';
        }
 
        // Clearing of all caches is only shown if explicitly enabled via TSConfig
        // or if BE-User is admin and the TSconfig explicitly disables the possibility for admins.
        // This is useful for big production systems where admins accidentally could slow down the system.
        if (($userTsConfig['options.']['clearCache.']['all'] ?? false)
            || ($isAdmin && (bool)($userTsConfig['options.']['clearCache.']['all'] ?? true))
        ) {
            $this->cacheActions[] = [
                'id' => 'all',
                'title' => 'LLL:EXT:core/Resources/Private/Language/locallang_core.xlf:flushAllCachesTitle2',
                'description' => 'LLL:EXT:core/Resources/Private/Language/locallang_core.xlf:flushAllCachesDescription2',
                'href' => (string)$uriBuilder->buildUriFromRoute('tce_db', ['cacheCmd' => 'all']),
                'iconIdentifier' => 'actions-system-cache-clear-impact-high'
            ];
            $this->optionValues[] = 'all';
        }
 
        // Hook for manipulating cacheActions
        foreach (‪$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['additionalBackendItems']['cacheActions'] ?? [] as $cacheAction) {
            $hookObject = GeneralUtility::makeInstance($cacheAction);
            if (!$hookObject instanceof ‪ClearCacheActionsHookInterface) {
                throw new \UnexpectedValueException($cacheAction . ' must implement interface ' . ClearCacheActionsHookInterface::class, 1228262000);
            }
            $hookObject->manipulateCacheActions($this->cacheActions, $this->optionValues);
        }
    }
 
    public function ‪checkAccess()
    {
        $backendUser = $this->‪getBackendUser();
        if ($backendUser->isAdmin()) {
            return true;
        }
        foreach ($this->optionValues as $value) {
            if ($backendUser->getTSConfig()['options.']['clearCache.'][$value] ?? false) {
                return true;
            }
        }
        return false;
    }
 
    public function ‪getItem()
    {
        if ($this->‪hasDropDown()) {
            return $this->‪getFluidTemplateObject('ClearCacheToolbarItem.html')->‪render();
        }
        $view = $this->‪getFluidTemplateObject('ClearCacheToolbarItemSingle.html');
        $cacheAction = end($this->cacheActions);
        $view->assignMultiple([
                'link'  => $cacheAction['href'],
                'title' => $cacheAction['title'],
                'iconIdentifier'  => $cacheAction['iconIdentifier'],
            ]);
        return $view->render();
    }
 
    public function ‪getDropDown()
    {
        $view = $this->‪getFluidTemplateObject('ClearCacheToolbarItemDropDown.html');
        $view->assign('cacheActions', $this->cacheActions);
        return $view->render();
    }
 
    public function ‪getAdditionalAttributes()
    {
        return [];
    }
 
    public function ‪hasDropDown()
    {
        return count($this->cacheActions) > 1;
    }
 
    public function ‪getIndex()
    {
        return 25;
    }
 
    protected function ‪getBackendUser()
    {
        return ‪$GLOBALS['BE_USER'];
    }
 
    protected function ‪getPageRenderer()
    {
        return GeneralUtility::makeInstance(PageRenderer::class);
    }
 
    protected function ‪getFluidTemplateObject(string $filename): ‪StandaloneView
    {
        $view = GeneralUtility::makeInstance(StandaloneView::class);
        $view->setLayoutRootPaths(['EXT:backend/Resources/Private/Layouts']);
        $view->setPartialRootPaths(['EXT:backend/Resources/Private/Partials/ToolbarItems']);
        $view->setTemplateRootPaths(['EXT:backend/Resources/Private/Templates/ToolbarItems']);
 
        $view->setTemplate($filename);
 
        $view->getRequest()->setControllerExtensionName('Backend');
        return $view;
    }
}