From 55f56db61ff03fa481f3ebb5d15cfdb5cb0a1968 Mon Sep 17 00:00:00 2001
From: Jake Dallimore <jake@moodle.com>
Date: Thu, 12 Sep 2019 11:02:21 +0800
Subject: [PATCH] MDL-66156 block_myoverview: remove orphaned course favourite
 records

---
 blocks/myoverview/db/upgrade.php | 58 ++++++++++++++++++++++++++++++++
 blocks/myoverview/version.php    |  2 +-
 2 files changed, 59 insertions(+), 1 deletion(-)
 create mode 100644 blocks/myoverview/db/upgrade.php

diff --git a/blocks/myoverview/db/upgrade.php b/blocks/myoverview/db/upgrade.php
new file mode 100644
index 00000000000..bc7d0b5c85f
--- /dev/null
+++ b/blocks/myoverview/db/upgrade.php
@@ -0,0 +1,58 @@
+<?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/>.
+
+/**
+ * This file keeps track of upgrades to the myoverview block
+ * @since 3.6.7
+ * @package block_myoverview
+ * @copyright 2019 Jake Dallimore <jrhdallimore@gmail.com>
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Upgrade code for the MyOverview block.
+ *
+ * @param int $oldversion
+ */
+function xmldb_block_myoverview_upgrade($oldversion) {
+    global $DB;
+
+    if ($oldversion < 2018120301) {
+        // Remove orphaned course favourites, which weren't being deleted when the course was deleted.
+        $sql = 'SELECT f.id
+                  FROM {favourite} f
+             LEFT JOIN {course} c
+                    ON (c.id = f.itemid)
+                 WHERE f.component = :component
+                   AND f.itemtype = :itemtype
+                   AND c.id IS NULL';
+        $params = ['component' => 'core_course', 'itemtype' => 'courses'];
+
+        if ($records = $DB->get_fieldset_sql($sql, $params)) {
+            $chunks = array_chunk($records, 1000);
+            foreach ($chunks as $chunk) {
+                list($insql, $inparams) = $DB->get_in_or_equal($chunk);
+                $DB->delete_records_select('favourite', "id $insql", $inparams);
+            }
+        }
+
+        upgrade_block_savepoint(true, 2018120301, 'myoverview', false);
+    }
+
+    return true;
+}
diff --git a/blocks/myoverview/version.php b/blocks/myoverview/version.php
index 03bb65a527c..e6199920609 100644
--- a/blocks/myoverview/version.php
+++ b/blocks/myoverview/version.php
@@ -24,6 +24,6 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version   = 2018120300;         // The current plugin version (Date: YYYYMMDDXX).
+$plugin->version   = 2018120301;         // The current plugin version (Date: YYYYMMDDXX).
 $plugin->requires  = 2018112800;         // Requires this Moodle version.
 $plugin->component = 'block_myoverview'; // Full name of the plugin (used for diagnostics).