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+<?php
+
+# Copyright (C) 2004 Brion Vibber, lcrocker, Tim Starling,
+# Domas Mituzas, Ashar Voultoiz, Jens Frank, Zhengzhu.
+#
+# © 2006 Rob Church <robchur@gmail.com>
+#
+# http://www.mediawiki.org/
+#
+# This program 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 2 of the License, or
+# (at your option) any later version.
+#
+# This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+# http://www.gnu.org/copyleft/gpl.html
+/**
+ *
+ * @package MediaWiki
+ * @subpackage SpecialPage
+ */
+
+/**
+ * This class is used to get a list of user. The ones with specials
+ * rights (sysop, bureaucrat, developer) will have them displayed
+ * next to their names.
+ *
+ * @package MediaWiki
+ * @subpackage SpecialPage
+ */
+class ListUsersPage extends QueryPage {
+ var $requestedGroup = '';
+ var $requestedUser = '';
+
+ function getName() {
+ return 'Listusers';
+ }
+ function isSyndicated() { return false; }
+
+ /**
+ * Not expensive, this class won't work properly with the caching system anyway
+ */
+ function isExpensive() {
+ return false;
+ }
+
+ /**
+ * Fetch user page links and cache their existence
+ */
+ function preprocessResults( &$db, &$res ) {
+ $batch = new LinkBatch;
+ while ( $row = $db->fetchObject( $res ) ) {
+ $batch->addObj( Title::makeTitleSafe( $row->namespace, $row->title ) );
+ }
+ $batch->execute();
+
+ // Back to start for display
+ if( $db->numRows( $res ) > 0 ) {
+ // If there are no rows we get an error seeking.
+ $db->dataSeek( $res, 0 );
+ }
+ }
+
+ /**
+ * Show a drop down list to select a group as well as a user name
+ * search box.
+ * @todo localize
+ */
+ function getPageHeader( ) {
+ $self = $this->getTitle();
+
+ # Form tag
+ $out = wfOpenElement( 'form', array( 'method' => 'post', 'action' => $self->getLocalUrl() ) );
+
+ # Group drop-down list
+ $out .= wfElement( 'label', array( 'for' => 'group' ), wfMsg( 'group' ) ) . ' ';
+ $out .= wfOpenElement( 'select', array( 'name' => 'group' ) );
+ $out .= wfElement( 'option', array( 'value' => '' ), wfMsg( 'group-all' ) ); # Item for "all groups"
+ $groups = User::getAllGroups();
+ foreach( $groups as $group ) {
+ $attribs = array( 'value' => $group );
+ if( $group == $this->requestedGroup )
+ $attribs['selected'] = 'selected';
+ $out .= wfElement( 'option', $attribs, User::getGroupName( $group ) );
+ }
+ $out .= wfCloseElement( 'select' ) . ' ';;# . wfElement( 'br' );
+
+ # Username field
+ $out .= wfElement( 'label', array( 'for' => 'username' ), wfMsg( 'specialloguserlabel' ) ) . ' ';
+ $out .= wfElement( 'input', array( 'type' => 'text', 'id' => 'username', 'name' => 'username',
+ 'value' => $this->requestedUser ) ) . ' ';
+
+ # Preserve offset and limit
+ if( $this->offset )
+ $out .= wfElement( 'input', array( 'type' => 'hidden', 'name' => 'offset', 'value' => $this->offset ) );
+ if( $this->limit )
+ $out .= wfElement( 'input', array( 'type' => 'hidden', 'name' => 'limit', 'value' => $this->limit ) );
+
+ # Submit button and form bottom
+ $out .= wfElement( 'input', array( 'type' => 'submit', 'value' => wfMsg( 'allpagessubmit' ) ) );
+ $out .= wfCloseElement( 'form' );
+
+ return $out;
+ }
+
+ function getSQL() {
+ $dbr =& wfGetDB( DB_SLAVE );
+ $user = $dbr->tableName( 'user' );
+ $user_groups = $dbr->tableName( 'user_groups' );
+
+ // We need to get an 'atomic' list of users, so that we
+ // don't break the list half-way through a user's group set
+ // and so that lists by group will show all group memberships.
+ //
+ // On MySQL 4.1 we could use GROUP_CONCAT to grab group
+ // assignments together with users pretty easily. On other
+ // versions, it's not so easy to do it consistently.
+ // For now we'll just grab the number of memberships, so
+ // we can then do targetted checks on those who are in
+ // non-default groups as we go down the list.
+
+ $userspace = NS_USER;
+ $sql = "SELECT 'Listusers' as type, $userspace AS namespace, user_name AS title, " .
+ "user_name as value, user_id, COUNT(ug_group) as numgroups " .
+ "FROM $user ".
+ "LEFT JOIN $user_groups ON user_id=ug_user " .
+ $this->userQueryWhere( $dbr ) .
+ " GROUP BY user_name";
+
+ return $sql;
+ }
+
+ function userQueryWhere( &$dbr ) {
+ $conds = $this->userQueryConditions();
+ return empty( $conds )
+ ? ""
+ : "WHERE " . $dbr->makeList( $conds, LIST_AND );
+ }
+
+ function userQueryConditions() {
+ $conds = array();
+ if( $this->requestedGroup != '' ) {
+ $conds['ug_group'] = $this->requestedGroup;
+ }
+ if( $this->requestedUser != '' ) {
+ $conds['user_name'] = $this->requestedUser;
+ }
+ return $conds;
+ }
+
+ function linkParameters() {
+ $conds = array();
+ if( $this->requestedGroup != '' ) {
+ $conds['group'] = $this->requestedGroup;
+ }
+ if( $this->requestedUser != '' ) {
+ $conds['username'] = $this->requestedUser;
+ }
+ return $conds;
+ }
+
+ function sortDescending() {
+ return false;
+ }
+
+ function formatResult( $skin, $result ) {
+ $userPage = Title::makeTitle( $result->namespace, $result->title );
+ $name = $skin->makeLinkObj( $userPage, htmlspecialchars( $userPage->getText() ) );
+ $groups = null;
+
+ if( !isset( $result->numgroups ) || $result->numgroups > 0 ) {
+ $dbr =& wfGetDB( DB_SLAVE );
+ $result = $dbr->select( 'user_groups',
+ array( 'ug_group' ),
+ array( 'ug_user' => $result->user_id ),
+ 'ListUsersPage::formatResult' );
+ $groups = array();
+ while( $row = $dbr->fetchObject( $result ) ) {
+ $groups[$row->ug_group] = User::getGroupMember( $row->ug_group );
+ }
+ $dbr->freeResult( $result );
+
+ if( count( $groups ) > 0 ) {
+ foreach( $groups as $group => $desc ) {
+ if( $page = User::getGroupPage( $group ) ) {
+ $list[] = $skin->makeLinkObj( $page, htmlspecialchars( $desc ) );
+ } else {
+ $list[] = htmlspecialchars( $desc );
+ }
+ }
+ $groups = implode( ', ', $list );
+ } else {
+ $groups = '';
+ }
+
+ }
+
+ return wfSpecialList( $name, $groups );
+ }
+}
+
+/**
+ * constructor
+ * $par string (optional) A group to list users from
+ */
+function wfSpecialListusers( $par = null ) {
+ global $wgRequest, $wgContLang;
+
+ list( $limit, $offset ) = wfCheckLimits();
+
+
+ $slu = new ListUsersPage();
+
+ /**
+ * Get some parameters
+ */
+ $groupTarget = isset($par) ? $par : $wgRequest->getVal( 'group' );
+ $slu->requestedGroup = $groupTarget;
+
+ # 'Validate' the username first
+ $username = $wgRequest->getText( 'username', '' );
+ $user = User::newFromName( $username );
+ $slu->requestedUser = is_object( $user ) ? $user->getName() : '';
+
+ return $slu->doQuery( $offset, $limit );
+}
+
+?>