From 1079dc608e53eb2a6e04e8cad37078f447b2b050 Mon Sep 17 00:00:00 2001
From: Johannes Meyer <johannes.meyer@icinga.com>
Date: Mon, 15 Jul 2024 16:19:46 +0200
Subject: [PATCH] ChannelForm: Store cleared default options as empty string

---
 application/forms/ChannelForm.php | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/application/forms/ChannelForm.php b/application/forms/ChannelForm.php
index 0394e89c..7b03b7e1 100644
--- a/application/forms/ChannelForm.php
+++ b/application/forms/ChannelForm.php
@@ -397,17 +397,19 @@ protected function fromCurrentLocale(array $localeMap): ?string
      */
     private function filterConfig(array $config): array
     {
-        return array_filter(
-            $config,
-            function ($configItem, $key) {
-                if (isset($this->defaultChannelOptions[$key])) {
-                    return $this->defaultChannelOptions[$key] !== $configItem;
+        foreach ($config as $key => $value) {
+            if (isset($this->defaultChannelOptions[$key])) {
+                if ($value === null) {
+                    $config[$key] = '';
+                } elseif ($this->defaultChannelOptions[$key] === $value) {
+                    unset($config[$key]);
                 }
+            } elseif ($value === null) {
+                unset($config[$key]);
+            }
+        }
 
-                return $configItem !== null;
-            },
-            ARRAY_FILTER_USE_BOTH
-        );
+        return $config;
     }
 
     /**