From 167e46fea46c1ae54527db70398eab4faaa2344a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20B=C3=B6hmer?= <jan.h.boehmer@gmx.de>
Date: Sat, 13 Jun 2020 21:55:20 +0200
Subject: [PATCH] Do not delete an file if there is an other attachment
 remaining after deletion.

Fixes issue #71.
---
 src/EntityListeners/AttachmentDeleteListener.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/EntityListeners/AttachmentDeleteListener.php b/src/EntityListeners/AttachmentDeleteListener.php
index ab033e7e..bf17a1fc 100644
--- a/src/EntityListeners/AttachmentDeleteListener.php
+++ b/src/EntityListeners/AttachmentDeleteListener.php
@@ -131,7 +131,9 @@ class AttachmentDeleteListener
         $file = $this->attachmentHelper->attachmentToFile($attachment);
         //Only delete if the attachment has a valid file.
         if (null !== $file) {
-            $this->attachmentReverseSearch->deleteIfNotUsed($file);
+            /* The original file has already been removed, so we have to decrease the threshold to zero,
+            as any remaining attachment depends on this attachment, and we must not delete this file! */
+            $this->attachmentReverseSearch->deleteIfNotUsed($file, 0);
         }
     }
 }