From c51dc77c17797709f654016002b2959c95e437a1 Mon Sep 17 00:00:00 2001
From: Dan Marsden <dan@danmarsden.com>
Date: Thu, 2 Feb 2017 20:49:03 +1300
Subject: [PATCH] Fixes #241 convert deprecated hook to observer.

---
 classes/observer.php | 57 ++++++++++++++++++++++++++++++++++++++++++++
 db/events.php        | 34 ++++++++++++++++++++++++++
 lib.php              | 20 ----------------
 version.php          |  2 +-
 4 files changed, 92 insertions(+), 21 deletions(-)
 create mode 100644 classes/observer.php
 create mode 100644 db/events.php

diff --git a/classes/observer.php b/classes/observer.php
new file mode 100644
index 0000000..16804a8
--- /dev/null
+++ b/classes/observer.php
@@ -0,0 +1,57 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Event observers supported by this module
+ *
+ * @package    mod_attendance
+ * @copyright  2017 Dan Marsden
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Event observers supported by this module
+ *
+ * @package    mod_attendance
+ * @copyright  2017 Dan Marsden
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class mod_attendance_observer {
+
+    /**
+     * Observer for the event course_content_deleted - delete all attendance stuff.
+     *
+     * @param \core\event\course_content_deleted $event
+     */
+    public static function course_content_deleted(\core\event\course_content_deleted $event) {
+        global $DB;
+
+        $attids = array_keys($DB->get_records('attendance', array('course' =>  $event->objectid), '', 'id'));
+        $sessids = array_keys($DB->get_records_list('attendance_sessions', 'attendanceid', $attids, '', 'id'));
+        if (attendance_existing_calendar_events_ids($sessids)) {
+            attendance_delete_calendar_events($sessids);
+        }
+        if ($sessids) {
+            $DB->delete_records_list('attendance_log', 'sessionid', $sessids);
+        }
+        if ($attids) {
+            $DB->delete_records_list('attendance_statuses', 'attendanceid', $attids);
+            $DB->delete_records_list('attendance_sessions', 'attendanceid', $attids);
+        }
+    }
+}
diff --git a/db/events.php b/db/events.php
new file mode 100644
index 0000000..afe87a6
--- /dev/null
+++ b/db/events.php
@@ -0,0 +1,34 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Attendance event handler definition.
+ *
+ * @package mod_attendance
+ * @category event
+ * @copyright 2017 Dan Marsden
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+// List of observers.
+$observers = array(
+
+    array(
+        'eventname'   => '\core\event\course_content_deleted',
+        'callback'    => 'mod_attendance_observer::course_content_deleted',
+    ),
+
+);
diff --git a/lib.php b/lib.php
index e5ab12c..e3d6163 100644
--- a/lib.php
+++ b/lib.php
@@ -120,26 +120,6 @@ function attendance_delete_instance($id) {
     return true;
 }
 
-function attendance_delete_course($course, $feedback=true) {
-    global $DB;
-
-    $attids = array_keys($DB->get_records('attendance', array('course' => $course->id), '', 'id'));
-    $sessids = array_keys($DB->get_records_list('attendance_sessions', 'attendanceid', $attids, '', 'id'));
-    if (attendance_existing_calendar_events_ids($sessids)) {
-        attendance_delete_calendar_events($sessids);
-    }
-    if ($sessids) {
-        $DB->delete_records_list('attendance_log', 'sessionid', $sessids);
-    }
-    if ($attids) {
-        $DB->delete_records_list('attendance_statuses', 'attendanceid', $attids);
-        $DB->delete_records_list('attendance_sessions', 'attendanceid', $attids);
-    }
-    $DB->delete_records('attendance', array('course' => $course->id));
-
-    return true;
-}
-
 /**
  * Called by course/reset.php
  * @param $mform form passed by reference
diff --git a/version.php b/version.php
index b9ce0a8..79d9f6f 100644
--- a/version.php
+++ b/version.php
@@ -23,7 +23,7 @@
  */
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version  = 2017020202;
+$plugin->version  = 2017020203;
 $plugin->requires = 2016111800;
 $plugin->release = '3.2.3';
 $plugin->maturity  = MATURITY_STABLE;