+
+ /**
+ * Returns an array of the groups that a particular group can add/remove.
+ *
+ * @param $group String: the group to check for whether it can add/remove
+ * @return Array array( 'add' => array( addablegroups ),
+ * 'remove' => array( removablegroups ),
+ * 'add-self' => array( addablegroups to self),
+ * 'remove-self' => array( removable groups from self) )
+ */
+ static function changeableByGroup( $group ) {
+ global $wgAddGroups, $wgRemoveGroups, $wgGroupsAddToSelf, $wgGroupsRemoveFromSelf;
+
+ $groups = array( 'add' => array(), 'remove' => array(), 'add-self' => array(), 'remove-self' => array() );
+ if( empty($wgAddGroups[$group]) ) {
+ // Don't add anything to $groups
+ } elseif( $wgAddGroups[$group] === true ) {
+ // You get everything
+ $groups['add'] = self::getAllGroups();
+ } elseif( is_array($wgAddGroups[$group]) ) {
+ $groups['add'] = $wgAddGroups[$group];
+ }
+
+ // Same thing for remove
+ if( empty($wgRemoveGroups[$group]) ) {
+ } elseif($wgRemoveGroups[$group] === true ) {
+ $groups['remove'] = self::getAllGroups();
+ } elseif( is_array($wgRemoveGroups[$group]) ) {
+ $groups['remove'] = $wgRemoveGroups[$group];
+ }
+
+ // Re-map numeric keys of AddToSelf/RemoveFromSelf to the 'user' key for backwards compatibility
+ if( empty($wgGroupsAddToSelf['user']) || $wgGroupsAddToSelf['user'] !== true ) {
+ foreach($wgGroupsAddToSelf as $key => $value) {
+ if( is_int($key) ) {
+ $wgGroupsAddToSelf['user'][] = $value;
+ }
+ }
+ }
+
+ if( empty($wgGroupsRemoveFromSelf['user']) || $wgGroupsRemoveFromSelf['user'] !== true ) {
+ foreach($wgGroupsRemoveFromSelf as $key => $value) {
+ if( is_int($key) ) {
+ $wgGroupsRemoveFromSelf['user'][] = $value;
+ }
+ }
+ }
+
+ // Now figure out what groups the user can add to him/herself
+ if( empty($wgGroupsAddToSelf[$group]) ) {
+ } elseif( $wgGroupsAddToSelf[$group] === true ) {
+ // No idea WHY this would be used, but it's there
+ $groups['add-self'] = User::getAllGroups();
+ } elseif( is_array($wgGroupsAddToSelf[$group]) ) {
+ $groups['add-self'] = $wgGroupsAddToSelf[$group];
+ }
+
+ if( empty($wgGroupsRemoveFromSelf[$group]) ) {
+ } elseif( $wgGroupsRemoveFromSelf[$group] === true ) {
+ $groups['remove-self'] = User::getAllGroups();
+ } elseif( is_array($wgGroupsRemoveFromSelf[$group]) ) {
+ $groups['remove-self'] = $wgGroupsRemoveFromSelf[$group];
+ }
+
+ return $groups;
+ }
+
+ /**
+ * Returns an array of groups that this user can add and remove
+ * @return Array array( 'add' => array( addablegroups ),
+ * 'remove' => array( removablegroups ),
+ * 'add-self' => array( addablegroups to self),
+ * 'remove-self' => array( removable groups from self) )
+ */
+ function changeableGroups() {
+ if( $this->isAllowed( 'userrights' ) ) {
+ // This group gives the right to modify everything (reverse-
+ // compatibility with old "userrights lets you change
+ // everything")
+ // Using array_merge to make the groups reindexed
+ $all = array_merge( User::getAllGroups() );
+ return array(
+ 'add' => $all,
+ 'remove' => $all,
+ 'add-self' => array(),
+ 'remove-self' => array()
+ );
+ }
+
+ // Okay, it's not so simple, we will have to go through the arrays
+ $groups = array(
+ 'add' => array(),
+ 'remove' => array(),
+ 'add-self' => array(),
+ 'remove-self' => array() );
+ $addergroups = $this->getEffectiveGroups();
+
+ foreach ($addergroups as $addergroup) {
+ $groups = array_merge_recursive(
+ $groups, $this->changeableByGroup($addergroup)
+ );
+ $groups['add'] = array_unique( $groups['add'] );
+ $groups['remove'] = array_unique( $groups['remove'] );
+ $groups['add-self'] = array_unique( $groups['add-self'] );
+ $groups['remove-self'] = array_unique( $groups['remove-self'] );
+ }
+ return $groups;
+ }