From 34a8b22a2ff0e46fdad36a10ca6019a3760d1a4f Mon Sep 17 00:00:00 2001
From: Lars Lauger <lars.lauger@netlogix.de>
Date: Tue, 31 Jan 2023 17:03:11 +0100
Subject: [PATCH] BUGFIX: Don't flush if tags is an empty array

FOS Varnish will call array_chunk on the given tags with
the size of the tags array. If the tags are empty, an error
is thrown.
---
 Classes/Aspects/ContentCacheAspect.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Classes/Aspects/ContentCacheAspect.php b/Classes/Aspects/ContentCacheAspect.php
index feb4650..7a1b57e 100644
--- a/Classes/Aspects/ContentCacheAspect.php
+++ b/Classes/Aspects/ContentCacheAspect.php
@@ -129,8 +129,10 @@ public function registerDisableContentCache(JoinPointInterface $joinPoint): void
     public function interceptContentCacheFlush(JoinPointInterface $joinPoint)
     {
         $object = $joinPoint->getProxy();
-
         $tags = array_keys(ObjectAccess::getProperty($object, 'tagsToFlush', true));
+        if ($tags === []) {
+          return;
+        }
 
         $this->varnishBanService->banByTags($tags);
     }