public function clear_cache() {
$this->cache->volatile();
}
+
+ /**
+ * Checks to see if there are child nodes available in the specific user's preference node.
+ * If so, then they have the appropriate permissions view this user's preferences.
+ *
+ * @since Moodle 2.9.3
+ * @param int $userid The user's ID.
+ * @return bool True if child nodes exist to view, otherwise false.
+ */
+ public function can_view_user_preferences($userid) {
+ if (is_siteadmin()) {
+ return true;
+ }
+ // See if any nodes are present in the preferences section for this user.
+ $preferencenode = $this->find('userviewingsettings' . $userid, null);
+ if ($preferencenode && $preferencenode->has_children()) {
+ // Run through each child node.
+ foreach ($preferencenode->children as $childnode) {
+ // If the child node has children then this user has access to a link in the preferences page.
+ if ($childnode->has_children()) {
+ return true;
+ }
+ }
+ }
+ // No links found for the user to access on the preferences page.
+ return false;
+ }
}
/**
