Delete the file associated with an attachment after an attachment is delted or changed.

src/EntityListeners/AttachmentDeleteListener.php

@@ -0,0 +1,91 @@
+<?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\Attachments\Attachment;
+use App\Services\AttachmentHelper;
+use App\Services\AttachmentReverseSearch;
+use Doctrine\ORM\Event\LifecycleEventArgs;
+use Doctrine\ORM\Event\PreUpdateEventArgs;
+use Doctrine\ORM\Mapping\PostRemove;
+use Doctrine\ORM\Mapping\PreUpdate;
+
+/**
+ * This listener watches for changes on attachments and deletes the files associated with an attachment, that are not
+ * used any more. This can happens after an attachment is delteted or the path is changed.
+ * @package App\EntityListeners
+ */
+class AttachmentDeleteListener
+{
+    protected $attachmentReverseSearch;
+    protected $attachmentHelper;
+
+    public function __construct(AttachmentReverseSearch $attachmentReverseSearch, AttachmentHelper $attachmentHelper)
+    {
+        $this->attachmentReverseSearch = $attachmentReverseSearch;
+        $this->attachmentHelper = $attachmentHelper;
+    }
+
+    /**
+     * Removes the file associated with the attachment, if the file associated with the attachment changes.
+     * @param Attachment $attachment
+     * @param PreUpdateEventArgs $event
+     *
+     * @PreUpdate
+     */
+    public function preUpdateHandler(Attachment $attachment, PreUpdateEventArgs $event)
+    {
+        if ($event->hasChangedField('path')) {
+            $file = new \SplFileInfo($this->attachmentHelper->placeholderToRealPath($event->getOldValue('path')));
+            $this->attachmentReverseSearch->deleteIfNotUsed($file);
+        }
+    }
+
+    /**
+     * Removes the file associated with the attachment, after the attachment was deleted.
+     *
+     * @param Attachment $attachment
+     * @param LifecycleEventArgs $event
+     *
+     * @PostRemove
+     */
+    public function postRemoveHandler(Attachment $attachment, LifecycleEventArgs $event)
+    {
+        $file = $this->attachmentHelper->attachmentToFile($attachment);
+        //Only delete if the attachment has a valid file.
+        if ($file !== null) {
+            $this->attachmentReverseSearch->deleteIfNotUsed($file);
+        }
+    }
+
+}