MDL-62474 theme_boost: Fix Boost privacy provider

theme/boost/classes/privacy/provider.php

@@ -24,23 +24,56 @@
 
 namespace theme_boost\privacy;
 
+use \core_privacy\local\request\writer;
+use \core_privacy\local\metadata\collection;
+
 defined('MOODLE_INTERNAL') || die();
 
 /**
- * The boost theme does not store any data.
+ * The boost theme stores a user preference data.
  *
  * @copyright  2018 Andrew Nicols <andrew@nicols.co.uk>
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class provider implements \core_privacy\local\metadata\null_provider {
+class provider implements
+    // This plugin has data.
+    \core_privacy\local\metadata\provider,
+
+    \core_privacy\local\request\data_provider,
+
+    // This plugin has some sitewide user preferences to export.
+    \core_privacy\local\request\user_preference_provider
+{
+
+    const DRAWER_OPEN_NAV = 'drawer-open-nav';
 
     /**
-     * Get the language string identifier with the component's language
-     * file to explain why this plugin stores no data.
+     * Returns meta data about this system.
      *
-     * @return  string
+     * @param   collection     $itemcollection The initialised item collection to add items to.
+     * @return  collection     A listing of user data stored through this system.
      */
-    public static function get_reason() : string {
-        return 'privacy:metadata';
+    public static function get_metadata(collection $items) : collection {
+        $items->add_user_preference(self::DRAWER_OPEN_NAV, 'privacy:metadata:preference:draweropennav');
+
+        return $items;
+    }
+
+    /**
+     * Store all user preferences for the plugin.
+     *
+     * @param int $userid The userid of the user whose data is to be exported.
+     */
+    public static function export_user_preferences(int $userid) {
+        $draweropennavpref = get_user_preferences(self::DRAWER_OPEN_NAV, null, $userid);
+
+        if (isset($draweropennavpref)) {
+            writer::export_user_preference(
+                'theme_boost',
+                self::DRAWER_OPEN_NAV,
+                $draweropennavpref,
+                get_string('privacy:request:preference:draweropennav', 'theme_boost')
+            );
+        }
     }
 }

theme/boost/lang/en/theme_boost.php

@@ -44,3 +44,5 @@
 $string['rawscsspre'] = 'Raw initial SCSS';
 $string['rawscsspre_desc'] = 'In this field you can provide initialising SCSS code, it will be injected before everything else. Most of the time you will use this setting to define variables.';
 $string['region-side-pre'] = 'Right';
+$string['privacy:metadata:preference:draweropennav'] = 'Hide or show the left drawer menu nav.';
+$string['privacy:request:preference:draweropennav'] = 'Your preference for hide or show the left drawer menu nav';