From fe6e2afba4cf058536f2f178eba1c75de28afc19 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tim=20Lochmu=CC=88ller?= <tim.lochmueller@hdnet.de>
Date: Thu, 27 Feb 2020 16:04:17 +0100
Subject: [PATCH] Fix #233 - Add the explanation cache entry only, if there is
 no valid one with the same URI

---
 Classes/Cache/StaticFileBackend.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Classes/Cache/StaticFileBackend.php b/Classes/Cache/StaticFileBackend.php
index 68e1649384ae..f3f9fba93de9 100644
--- a/Classes/Cache/StaticFileBackend.php
+++ b/Classes/Cache/StaticFileBackend.php
@@ -53,7 +53,10 @@ public function set($entryIdentifier, $data, array $tags = [], $lifetime = null)
         ];
         if (\in_array('explanation', $tags, true)) {
             $databaseData['explanation'] = $data->getHeader('X-SFC-Explanation');
-            parent::set($entryIdentifier, \serialize($databaseData), $tags, $realLifetime);
+            if (!parent::has($entryIdentifier)) {
+                // Add only the details if there is no valid cache entry
+                parent::set($entryIdentifier, \serialize($databaseData), $tags, $realLifetime);
+            }
             return;
         }