MDL-63638 block_tag_flickr: Add support for removal of context users

This issue is part of the MDL-62560 Epic.

blocks/tag_flickr/classes/privacy/provider.php

@@ -28,6 +28,8 @@
 use core_privacy\local\request\approved_contextlist;
 use core_privacy\local\request\context;
 use core_privacy\local\request\contextlist;
+use core_privacy\local\request\userlist;
+use core_privacy\local\request\approved_userlist;
 
 defined('MOODLE_INTERNAL') || die();
 
@@ -37,7 +39,10 @@
  * @copyright  2018 Zig Tan <zig@moodle.com>
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class provider implements \core_privacy\local\metadata\provider, \core_privacy\local\request\plugin\provider {
+class provider implements
+        \core_privacy\local\metadata\provider,
+        \core_privacy\local\request\core_userlist_provider,
+        \core_privacy\local\request\plugin\provider {
 
     /**
      * Returns meta data about this system.
@@ -67,6 +72,14 @@ public static function get_contexts_for_userid(int $userid) : contextlist {
         return new contextlist();
     }
 
+    /**
+     * Get the list of users who have data within a context.
+     *
+     * @param userlist $userlist The userlist containing the list of users who have data in this context/plugin combination.
+     */
+    public static function get_users_in_context(userlist $userlist) {
+    }
+
     /**
      * Export all user data for the specified user, in the specified contexts.
      *
@@ -83,6 +96,14 @@ public static function export_user_data(approved_contextlist $contextlist) {
     public static function delete_data_for_all_users_in_context(\context $context) {
     }
 
+    /**
+     * Delete multiple users within a single context.
+     *
+     * @param approved_userlist $userlist The approved context and user information to delete information for.
+     */
+    public static function delete_data_for_users(approved_userlist $userlist) {
+    }
+
     /**
      * Delete all user data for the specified user, in the specified contexts.
      *