From 4b2bf298f1db6507fdb50ec49b8db418e339aa91 Mon Sep 17 00:00:00 2001
From: Dmitrii Metelkin <dmitriim@catalyst-au.net>
Date: Fri, 6 Sep 2024 18:53:49 +1000
Subject: [PATCH] issue #5: process course_deleted event

---
 classes/observer.php    | 12 +++++++++++
 db/events.php           |  4 ++++
 tests/observer_test.php | 47 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 63 insertions(+)

diff --git a/classes/observer.php b/classes/observer.php
index 46b4cbf..ca23a25 100644
--- a/classes/observer.php
+++ b/classes/observer.php
@@ -18,6 +18,7 @@
 
 use core\event\course_category_created;
 use core\event\course_created;
+use core\event\course_deleted;
 use core\event\tag_added;
 use core\event\tag_removed;
 use core\event\tag_deleted;
@@ -95,6 +96,17 @@ public static function course_created(course_created $event): void {
         helper::add_item($category->id, helper::ITEM_TYPE_CATEGORY, $category->name, $course);
     }
 
+    /**
+     * Process course_deleted event.
+     *
+     * @param course_deleted $event The event.
+     */
+    public static function course_deleted(course_deleted $event): void {
+        $courseid = $event->courseid;
+        $coursename = $event->other['fullname'];
+        helper::remove_item($courseid, helper::ITEM_TYPE_COURSE, $coursename);
+    }
+
     /**
      * Process course_category_created event.
      *
diff --git a/db/events.php b/db/events.php
index 97c899d..cf3cc4c 100644
--- a/db/events.php
+++ b/db/events.php
@@ -41,6 +41,10 @@
         'eventname' => '\core\event\course_created',
         'callback' => '\tool_enrolprofile\observer::course_created',
     ],
+    [
+        'eventname' => '\core\event\course_deleted',
+        'callback' => '\tool_enrolprofile\observer::course_deleted',
+    ],
     [
         'eventname' => '\core\event\course_category_created',
         'callback' => '\tool_enrolprofile\observer::course_category_created',
diff --git a/tests/observer_test.php b/tests/observer_test.php
index da2a7fe..2d2dce4 100644
--- a/tests/observer_test.php
+++ b/tests/observer_test.php
@@ -313,6 +313,53 @@ public function test_course_created(): void {
         $this->assertNotEmpty($enrol);
     }
 
+    /**
+     * Check logic when deleting a course.
+     */
+    public function test_course_deleted(): void {
+        global $DB;
+
+        $coursename = 'Course name';
+        $course = $this->getDataGenerator()->create_course(['fullname' => $coursename]);
+
+        // Should be course and category cohorts.
+        $this->assertCount(2, $DB->get_records('enrol', ['courseid' => $course->id, 'enrol' => 'cohort']));
+
+        $coursecohort = $DB->get_record('cohort', ['name' => $coursename]);
+        $this->assertNotEmpty($coursecohort);
+
+        $cohort = cohort_get_cohort($coursecohort->id, context_course::instance($course->id), true);
+
+        $profilefielddata = $DB->get_field('user_info_field', 'param1', ['id' => $this->courseprofilefield->id]);
+        $this->assertNotEmpty($profilefielddata);
+        $this->assertTrue(in_array($coursename, explode("\n", $profilefielddata)));
+
+        $rule = $DB->get_record('tool_dynamic_cohorts', ['name' => $coursename]);
+        $this->assertNotEmpty($rule);
+        $this->assertEquals($cohort->id, $rule->cohortid);
+        $this->assertEquals(1, $rule->enabled);
+        $conditions = $DB->get_records('tool_dynamic_cohorts_c', ['ruleid' => $rule->id]);
+        $this->assertCount(2, $conditions);
+
+        $enrol = $DB->get_record('enrol', ['courseid' => $course->id, 'enrol' => 'cohort', 'customint1' => $cohort->id]);
+        $this->assertNotEmpty($enrol);
+
+        delete_course($course->id, false);
+
+        $coursecohort = $DB->get_record('cohort', ['name' => $coursename]);
+        $this->assertEmpty($coursecohort);
+
+        $profilefielddata = $DB->get_field('user_info_field', 'param1', ['id' => $this->courseprofilefield->id]);
+        $this->assertFalse(in_array($coursename, explode("\n", $profilefielddata)));
+
+        $this->assertEmpty($DB->get_record('tool_dynamic_cohorts', ['name' => $coursename]));
+        $conditions = $DB->get_records('tool_dynamic_cohorts_c', ['ruleid' => $rule->id]);
+        $this->assertCount(0, $conditions);
+
+        $enrol = $DB->get_record('enrol', ['courseid' => $course->id, 'enrol' => 'cohort', 'customint1' => $cohort->id]);
+        $this->assertEmpty($enrol);
+    }
+
     /**
      * Check logic when creating a course category.
      */