From 19bc9db2967e769cdeb441d371d8f7ed976addc9 Mon Sep 17 00:00:00 2001
From: lenaherf <lherfeld@uni-muenster.de>
Date: Wed, 3 Jun 2026 15:03:14 +0200
Subject: [PATCH 1/3] deletes now groups from the block_groups_hide table when
 deleted

---
 classes/observers/group_observer.php | 11 +++++++++++
 db/events.php                        |  4 ++++
 2 files changed, 15 insertions(+)

diff --git a/classes/observers/group_observer.php b/classes/observers/group_observer.php
index b7c7b78..4c13c0f 100644
--- a/classes/observers/group_observer.php
+++ b/classes/observers/group_observer.php
@@ -51,4 +51,15 @@ public static function group_created(\core\event\group_created $event) {
             $DB->insert_record_raw('block_groups_hide', ['id' => $groupid], true, false, true);
         }
     }
+
+    public static function group_deleted(\core\event\group_deleted $event) {
+        global $DB;
+
+        $groupid = $event->objectid;
+
+        // Remove the group from the block_groups_hide table if it exists.
+        if ($DB->record_exists('block_groups_hide', ['id' => $groupid])) {
+            $DB->delete_records('block_groups_hide', ['id' => $groupid]);
+        }
+    }
 }
diff --git a/db/events.php b/db/events.php
index 7d90229..fc279cc 100644
--- a/db/events.php
+++ b/db/events.php
@@ -29,4 +29,8 @@
         'eventname' => '\core\event\group_created',
         'callback' => '\block_groups\observers\group_observer::group_created',
     ],
+    [
+        'eventname' => '\core\event\group_deleted',
+        'callback' => '\block_groups\observers\group_observer::group_deleted',
+    ],
 ];

From 890dd78ff0008106205c14de8b86fa5a554a025b Mon Sep 17 00:00:00 2001
From: lenaherf <lherfeld@uni-muenster.de>
Date: Wed, 3 Jun 2026 15:26:18 +0200
Subject: [PATCH 2/3] Adding docblock to function

---
 classes/observers/group_observer.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/classes/observers/group_observer.php b/classes/observers/group_observer.php
index 4c13c0f..85ac083 100644
--- a/classes/observers/group_observer.php
+++ b/classes/observers/group_observer.php
@@ -52,6 +52,12 @@ public static function group_created(\core\event\group_created $event) {
         }
     }
 
+    /**
+     * Handles the group_deleted event.
+     * Automatically deletes the groups from the block_groups_hide table when a group itself has been deleted.
+     *
+     * @param \core\event\group_deleted $event
+     */
     public static function group_deleted(\core\event\group_deleted $event) {
         global $DB;
 

From 2babea2677b137779697384b5323a693cd3b1a8b Mon Sep 17 00:00:00 2001
From: lenaherf <lherfeld@uni-muenster.de>
Date: Tue, 9 Jun 2026 13:44:36 +0200
Subject: [PATCH 3/3] remove check

---
 classes/observers/group_observer.php | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/classes/observers/group_observer.php b/classes/observers/group_observer.php
index 85ac083..535835b 100644
--- a/classes/observers/group_observer.php
+++ b/classes/observers/group_observer.php
@@ -63,9 +63,7 @@ public static function group_deleted(\core\event\group_deleted $event) {
 
         $groupid = $event->objectid;
 
-        // Remove the group from the block_groups_hide table if it exists.
-        if ($DB->record_exists('block_groups_hide', ['id' => $groupid])) {
-            $DB->delete_records('block_groups_hide', ['id' => $groupid]);
-        }
+        // Remove the group from the block_groups_hide table.
+        $DB->delete_records('block_groups_hide', ['id' => $groupid]);
     }
 }