Cache the tree nodes list generated for StructuralEntityType.

src/EntityListeners/TreeCacheInvalidationListener.php

@@ -0,0 +1,84 @@
+<?php
+/**
+ *
+ * part-db version 0.1
+ * Copyright (C) 2005 Christoph Lechner
+ * http://www.cl-projects.de/
+ *
+ * part-db version 0.2+
+ * Copyright (C) 2009 K. Jacobs and others (see authors.php)
+ * http://code.google.com/p/part-db/
+ *
+ * Part-DB Version 0.4+
+ * Copyright (C) 2016 - 2019 Jan Böhmer
+ * https://github.com/jbtronics
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ *
+ */
+
+namespace App\EntityListeners;
+
+
+use App\Entity\Base\DBElement;
+use App\Entity\Base\StructuralDBElement;
+use App\Entity\UserSystem\Group;
+use App\Entity\UserSystem\User;
+use Doctrine\ORM\Event\LifecycleEventArgs;
+use Doctrine\ORM\Event\PostFlushEventArgs;
+use Doctrine\ORM\Event\PreFlushEventArgs;
+use Doctrine\ORM\Mapping as ORM;
+use Symfony\Contracts\Cache\TagAwareCacheInterface;
+
+class TreeCacheInvalidationListener
+{
+    protected $cache;
+
+    public function __construct(TagAwareCacheInterface $treeCache)
+    {
+        $this->cache = $treeCache;
+    }
+
+    /**
+     * @ORM\PostUpdate()
+     * @ORM\PostPersist()
+     * @ORM\PostRemove()
+     *
+     * @param DBElement $element
+     * @param LifecycleEventArgs $event
+     */
+    public function invalidate(DBElement $element, LifecycleEventArgs $event)
+    {
+        //If an element was changed, then invalidate all cached trees with this element class
+        if ($element instanceof StructuralDBElement) {
+            $secure_class_name = str_replace("\\", '_', get_class($element));
+            $this->cache->invalidateTags([$secure_class_name]);
+        }
+
+        //If a user change, then invalidate all cached trees for him
+        if ($element instanceof User) {
+            $tag = "user_" . $element->getUsername();
+            $this->cache->invalidateTags([$tag]);
+        }
+
+        /* If any group change, then invalidate all cached trees. Users Permissions can be inherited from groups,
+            so a change in any group can cause big permisssion changes for users. So to be sure, invalidate all trees */
+        if($element instanceof Group) {
+            $tag = "groups";
+            $this->cache->invalidateTags([$tag]);
+        }
+
+    }
+}