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typo3/sysext/extbase/Classes/Service/CacheService.php

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+<?php
+namespace TYPO3\CMS\Extbase\Service;
+
+/*
+ * 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!
+ */
+
+/**
+ * Cache clearing helper functions
+ * @internal only to be used within Extbase, not part of TYPO3 Core API.
+ */
+class CacheService implements \TYPO3\CMS\Core\SingletonInterface
+{
+    /**
+     * @var \SplStack
+     */
+    protected $pageIdStack;
+
+    /**
+     * @var \TYPO3\CMS\Core\Cache\CacheManager
+     */
+    protected $cacheManager;
+
+    /**
+     * @param \TYPO3\CMS\Core\Cache\CacheManager $cacheManager
+     */
+    public function injectCacheManager(\TYPO3\CMS\Core\Cache\CacheManager $cacheManager)
+    {
+        $this->cacheManager = $cacheManager;
+    }
+
+    /**
+     * Initializes the pageIdStack
+     */
+    public function __construct()
+    {
+        $this->pageIdStack = new \SplStack;
+    }
+
+    /**
+     * @return \SplStack
+     */
+    public function getPageIdStack()
+    {
+        return $this->pageIdStack;
+    }
+
+    /**
+     * Clears the page cache
+     *
+     * @param mixed $pageIdsToClear (int) single or (array) multiple pageIds to clear the cache for
+     */
+    public function clearPageCache($pageIdsToClear = null)
+    {
+        if ($pageIdsToClear === null) {
+            $this->cacheManager->flushCachesInGroup('pages');
+        } else {
+            if (!is_array($pageIdsToClear)) {
+                $pageIdsToClear = [(int)$pageIdsToClear];
+            }
+            $tags = array_map(function ($item) {
+                return 'pageId_' . $item;
+            }, $pageIdsToClear);
+            $this->cacheManager->flushCachesInGroupByTags('pages', $tags);
+        }
+    }
+
+    /**
+     * Walks through the pageIdStack, collects all pageIds
+     * as array and passes them on to clearPageCache.
+     */
+    public function clearCachesOfRegisteredPageIds()
+    {
+        if (!$this->pageIdStack->isEmpty()) {
+            $pageIds = [];
+            while (!$this->pageIdStack->isEmpty()) {
+                $pageIds[] = (int)$this->pageIdStack->pop();
+            }
+            $pageIds = array_values(array_unique($pageIds));
+            $this->clearPageCache($pageIds);
+        }
+    }
+}