From d72a6fc04cafdde72cbfe5dd987373dd8bb25892 Mon Sep 17 00:00:00 2001
From: Jake Dallimore <jake@moodle.com>
Date: Thu, 18 Jul 2019 15:13:58 +0800
Subject: [PATCH] MDL-66156 block_myoverview: purge course favourites on course
 deletion.

---
 blocks/myoverview/lib.php | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/blocks/myoverview/lib.php b/blocks/myoverview/lib.php
index d5bc9e23f19..933a173b9fc 100644
--- a/blocks/myoverview/lib.php
+++ b/blocks/myoverview/lib.php
@@ -121,3 +121,14 @@ function block_myoverview_user_preferences() {
 
     return $preferences;
 }
+
+/**
+ * Pre-delete course hook to cleanup any records with references to the deleted course.
+ *
+ * @param stdClass $course The deleted course
+ */
+function block_myoverview_pre_course_delete(\stdClass $course) {
+    // Removing any starred courses which have been created for users, for this course.
+    $service = \core_favourites\service_factory::get_service_for_component('core_course');
+    $service->delete_favourites_by_type_and_item('courses', $course->id);
+}