From 2595d450e0e97e3fe5050f87a2d95eeb8288386f Mon Sep 17 00:00:00 2001
From: Simey Lameze <simey@moodle.com>
Date: Thu, 14 Sep 2017 10:03:51 +0800
Subject: [PATCH] MDL-60126 competency: delete content upon user delete

---
 competency/classes/api.php | 34 ++++++++++++++++++++++++++++++++++
 lib/moodlelib.php          |  3 +++
 2 files changed, 37 insertions(+)

diff --git a/competency/classes/api.php b/competency/classes/api.php
index 600f8f823b1..ba2266228fc 100644
--- a/competency/classes/api.php
+++ b/competency/classes/api.php
@@ -4802,6 +4802,40 @@ class api {
         $DB->delete_records(template_cohort::TABLE, array('cohortid' => $cohort->id));
     }
 
+    /**
+     * Action to perform when a user is deleted.
+     *
+     * @param int $userid The user id.
+     */
+    public static function hook_user_deleted($userid) {
+        global $DB;
+
+        $usercompetencies = $DB->get_records(user_competency::TABLE, ['userid' => $userid], '', 'id');
+        foreach ($usercompetencies as $usercomp) {
+            $DB->delete_records(evidence::TABLE, ['usercompetencyid' => $usercomp->id]);
+        }
+
+        $DB->delete_records(user_competency::TABLE, ['userid' => $userid]);
+        $DB->delete_records(user_competency_course::TABLE, ['userid' => $userid]);
+        $DB->delete_records(user_competency_plan::TABLE, ['userid' => $userid]);
+
+        // Delete any associated files.
+        $fs = get_file_storage();
+        $context = context_user::instance($userid);
+        $userevidences = $DB->get_records(user_evidence::TABLE, ['userid' => $userid], '', 'id');
+        foreach ($userevidences as $userevidence) {
+            $DB->delete_records(user_evidence_competency::TABLE, ['userevidenceid' => $userevidence->id]);
+            $DB->delete_records(user_evidence::TABLE, ['id' => $userevidence->id]);
+            $fs->delete_area_files($context->id, 'core_competency', 'userevidence', $userevidence->id);
+        }
+
+        $userplans = $DB->get_records(plan::TABLE, ['userid' => $userid], '', 'id');
+        foreach ($userplans as $userplan) {
+            $DB->delete_records(plan_competency::TABLE, ['planid' => $userplan->id]);
+            $DB->delete_records(plan::TABLE, ['id' => $userplan->id]);
+        }
+    }
+
     /**
      * Manually grade a user competency.
      *
diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 4c6d4b9006a..8f86592e91b 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -4248,6 +4248,9 @@ function delete_user(stdClass $user) {
     // This might be slow but it is really needed - modules might do some extra cleanup!
     role_unassign_all(array('userid' => $user->id));
 
+    // Notify the competency subsystem.
+    \core_competency\api::hook_user_deleted($user->id);
+
     // Now do a brute force cleanup.
 
     // Delete all user events and subscription events.