Support offsets in prefix searching

[mediawiki.git] / includes / specials / SpecialListusers.php

<?php
/**
 * Implements Special:Listusers
 *
 * Copyright © 2004 Brion Vibber, lcrocker, Tim Starling,
 * Domas Mituzas, Antoine Musso, Jens Frank, Zhengzhu,
 * 2006 Rob Church <robchur@gmail.com>
 *
 * 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
 *
 * @file
 * @ingroup 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.
 *
 * @ingroup SpecialPage
 */
class UsersPager extends AlphabeticPager {

        /**
         * @param IContextSource $context
         * @param array $par (Default null)
         * @param bool $including Whether this page is being transcluded in
         * another page
         */
        function __construct( IContextSource $context = null, $par = null, $including = null ) {
                if ( $context ) {
                        $this->setContext( $context );
                }

                $request = $this->getRequest();
                $par = ( $par !== null ) ? $par : '';
                $parms = explode( '/', $par );
                $symsForAll = array( '*', 'user' );

                if ( $parms[0] != '' &&
                        ( in_array( $par, User::getAllGroups() ) || in_array( $par, $symsForAll ) )
                ) {
                        $this->requestedGroup = $par;
                        $un = $request->getText( 'username' );
                } elseif ( count( $parms ) == 2 ) {
                        $this->requestedGroup = $parms[0];
                        $un = $parms[1];
                } else {
                        $this->requestedGroup = $request->getVal( 'group' );
                        $un = ( $par != '' ) ? $par : $request->getText( 'username' );
                }

                if ( in_array( $this->requestedGroup, $symsForAll ) ) {
                        $this->requestedGroup = '';
                }
                $this->editsOnly = $request->getBool( 'editsOnly' );
                $this->creationSort = $request->getBool( 'creationSort' );
                $this->including = $including;
                $this->mDefaultDirection = $request->getBool( 'desc' )
                        ? IndexPager::DIR_DESCENDING
                        : IndexPager::DIR_ASCENDING;

                $this->requestedUser = '';

                if ( $un != '' ) {
                        $username = Title::makeTitleSafe( NS_USER, $un );

                        if ( !is_null( $username ) ) {
                                $this->requestedUser = $username->getText();
                        }
                }

                parent::__construct();
        }

        /**
         * @return string
         */
        function getIndexField() {
                return $this->creationSort ? 'user_id' : 'user_name';
        }

        /**
         * @return array
         */
        function getQueryInfo() {
                $dbr = wfGetDB( DB_SLAVE );
                $conds = array();

                // Don't show hidden names
                if ( !$this->getUser()->isAllowed( 'hideuser' ) ) {
                        $conds[] = 'ipb_deleted IS NULL OR ipb_deleted = 0';
                }

                $options = array();

                if ( $this->requestedGroup != '' ) {
                        $conds['ug_group'] = $this->requestedGroup;
                }

                if ( $this->requestedUser != '' ) {
                        # Sorted either by account creation or name
                        if ( $this->creationSort ) {
                                $conds[] = 'user_id >= ' . intval( User::idFromName( $this->requestedUser ) );
                        } else {
                                $conds[] = 'user_name >= ' . $dbr->addQuotes( $this->requestedUser );
                        }
                }

                if ( $this->editsOnly ) {
                        $conds[] = 'user_editcount > 0';
                }

                $options['GROUP BY'] = $this->creationSort ? 'user_id' : 'user_name';

                $query = array(
                        'tables' => array( 'user', 'user_groups', 'ipblocks' ),
                        'fields' => array(
                                'user_name' => $this->creationSort ? 'MAX(user_name)' : 'user_name',
                                'user_id' => $this->creationSort ? 'user_id' : 'MAX(user_id)',
                                'edits' => 'MAX(user_editcount)',
                                'numgroups' => 'COUNT(ug_group)',
                                'singlegroup' => 'MAX(ug_group)', // the usergroup if there is only one
                                'creation' => 'MIN(user_registration)',
                                'ipb_deleted' => 'MAX(ipb_deleted)' // block/hide status
                        ),
                        'options' => $options,
                        'join_conds' => array(
                                'user_groups' => array( 'LEFT JOIN', 'user_id=ug_user' ),
                                'ipblocks' => array(
                                        'LEFT JOIN', array(
                                                'user_id=ipb_user',
                                                'ipb_auto' => 0
                                        )
                                ),
                        ),
                        'conds' => $conds
                );

                wfRunHooks( 'SpecialListusersQueryInfo', array( $this, &$query ) );

                return $query;
        }

        /**
         * @param stdClass $row
         * @return string
         */
        function formatRow( $row ) {
                if ( $row->user_id == 0 ) { #Bug 16487
                        return '';
                }

                $userName = $row->user_name;

                $ulinks = Linker::userLink( $row->user_id, $userName );
                $ulinks .= Linker::userToolLinksRedContribs(
                        $row->user_id,
                        $userName,
                        (int)$row->edits
                );

                $lang = $this->getLanguage();

                $groups = '';
                $groups_list = self::getGroups( $row->user_id );

                if ( !$this->including && count( $groups_list ) > 0 ) {
                        $list = array();
                        foreach ( $groups_list as $group ) {
                                $list[] = self::buildGroupLink( $group, $userName );
                        }
                        $groups = $lang->commaList( $list );
                }

                $item = $lang->specialList( $ulinks, $groups );

                if ( $row->ipb_deleted ) {
                        $item = "<span class=\"deleted\">$item</span>";
                }

                $edits = '';
                if ( !$this->including && $this->getConfig()->get( 'Edititis' ) ) {
                        $count = $this->msg( 'usereditcount' )->numParams( $row->edits )->escaped();
                        $edits = $this->msg( 'word-separator' )->escaped() . $this->msg( 'brackets', $count )->escaped();
                }

                $created = '';
                # Some rows may be null
                if ( !$this->including && $row->creation ) {
                        $user = $this->getUser();
                        $d = $lang->userDate( $row->creation, $user );
                        $t = $lang->userTime( $row->creation, $user );
                        $created = $this->msg( 'usercreated', $d, $t, $row->user_name )->escaped();
                        $created = ' ' . $this->msg( 'parentheses' )->rawParams( $created )->escaped();
                }
                $blocked = !is_null( $row->ipb_deleted ) ?
                        ' ' . $this->msg( 'listusers-blocked', $userName )->escaped() :
                        '';

                wfRunHooks( 'SpecialListusersFormatRow', array( &$item, $row ) );

                return Html::rawElement( 'li', array(), "{$item}{$edits}{$created}{$blocked}" );
        }

        function doBatchLookups() {
                $batch = new LinkBatch();
                # Give some pointers to make user links
                foreach ( $this->mResult as $row ) {
                        $batch->add( NS_USER, $row->user_name );
                        $batch->add( NS_USER_TALK, $row->user_name );
                }
                $batch->execute();
                $this->mResult->rewind();
        }

        /**
         * @return string
         */
        function getPageHeader() {
                list( $self ) = explode( '/', $this->getTitle()->getPrefixedDBkey() );

                # Form tag
                $out = Xml::openElement(
                        'form',
                        array( 'method' => 'get', 'action' => wfScript(), 'id' => 'mw-listusers-form' )
                ) .
                        Xml::fieldset( $this->msg( 'listusers' )->text() ) .
                        Html::hidden( 'title', $self );

                # Username field
                $out .= Xml::label( $this->msg( 'listusersfrom' )->text(), 'offset' ) . ' ' .
                        Html::input(
                                'username',
                                $this->requestedUser,
                                'text',
                                array(
                                        'id' => 'offset',
                                        'size' => 20,
                                        'autofocus' => $this->requestedUser === ''
                                )
                        ) . ' ';

                # Group drop-down list
                $out .= Xml::label( $this->msg( 'group' )->text(), 'group' ) . ' ' .
                        Xml::openElement( 'select', array( 'name' => 'group', 'id' => 'group' ) ) .
                        Xml::option( $this->msg( 'group-all' )->text(), '' );
                foreach ( $this->getAllGroups() as $group => $groupText ) {
                        $out .= Xml::option( $groupText, $group, $group == $this->requestedGroup );
                }
                $out .= Xml::closeElement( 'select' ) . '<br />';
                $out .= Xml::checkLabel(
                        $this->msg( 'listusers-editsonly' )->text(),
                        'editsOnly',
                        'editsOnly',
                        $this->editsOnly
                );
                $out .= '&#160;';
                $out .= Xml::checkLabel(
                        $this->msg( 'listusers-creationsort' )->text(),
                        'creationSort',
                        'creationSort',
                        $this->creationSort
                );
                $out .= '&#160;';
                $out .= Xml::checkLabel(
                        $this->msg( 'listusers-desc' )->text(),
                        'desc',
                        'desc',
                        $this->mDefaultDirection
                );
                $out .= '<br />';

                wfRunHooks( 'SpecialListusersHeaderForm', array( $this, &$out ) );

                # Submit button and form bottom
                $out .= Html::hidden( 'limit', $this->mLimit );
                $out .= Xml::submitButton( $this->msg( 'allpagessubmit' )->text() );
                wfRunHooks( 'SpecialListusersHeader', array( $this, &$out ) );
                $out .= Xml::closeElement( 'fieldset' ) .
                        Xml::closeElement( 'form' );

                return $out;
        }

        /**
         * Get a list of all explicit groups
         * @return array
         */
        function getAllGroups() {
                $result = array();
                foreach ( User::getAllGroups() as $group ) {
                        $result[$group] = User::getGroupName( $group );
                }
                asort( $result );

                return $result;
        }

        /**
         * Preserve group and username offset parameters when paging
         * @return array
         */
        function getDefaultQuery() {
                $query = parent::getDefaultQuery();
                if ( $this->requestedGroup != '' ) {
                        $query['group'] = $this->requestedGroup;
                }
                if ( $this->requestedUser != '' ) {
                        $query['username'] = $this->requestedUser;
                }
                wfRunHooks( 'SpecialListusersDefaultQuery', array( $this, &$query ) );

                return $query;
        }

        /**
         * Get a list of groups the specified user belongs to
         *
         * @param int $uid User id
         * @return array
         */
        protected static function getGroups( $uid ) {
                $user = User::newFromId( $uid );
                $groups = array_diff( $user->getEffectiveGroups(), User::getImplicitGroups() );

                return $groups;
        }

        /**
         * Format a link to a group description page
         *
         * @param string $group Group name
         * @param string $username Username
         * @return string
         */
        protected static function buildGroupLink( $group, $username ) {
                return User::makeGroupLinkHtml(
                        $group,
                        htmlspecialchars( User::getGroupMember( $group, $username ) )
                );
        }
}

/**
 * @ingroup SpecialPage
 */
class SpecialListUsers extends IncludableSpecialPage {
        /**
         * Constructor
         */
        public function __construct() {
                parent::__construct( 'Listusers' );
        }

        /**
         * Show the special page
         *
         * @param string $par (optional) A group to list users from
         */
        public function execute( $par ) {
                $this->setHeaders();
                $this->outputHeader();

                $up = new UsersPager( $this->getContext(), $par, $this->including() );

                # getBody() first to check, if empty
                $usersbody = $up->getBody();

                $s = '';
                if ( !$this->including() ) {
                        $s = $up->getPageHeader();
                }

                if ( $usersbody ) {
                        $s .= $up->getNavigationBar();
                        $s .= Html::rawElement( 'ul', array(), $usersbody );
                        $s .= $up->getNavigationBar();
                } else {
                        $s .= $this->msg( 'listusers-noresult' )->parseAsBlock();
                }

                $this->getOutput()->addHTML( $s );
        }

        /**
         * Return an array of subpages that this special page will accept.
         *
         * @return string[] subpages
         */
        public function getSubpagesForPrefixSearch() {
                return User::getAllGroups();
        }

        protected function getGroupName() {
                return 'users';
        }
}

/**
 * Redirect page: Special:ListAdmins --> Special:ListUsers/sysop.
 *
 * @ingroup SpecialPage
 */
class SpecialListAdmins extends SpecialRedirectToSpecial {
        function __construct() {
                parent::__construct( 'Listadmins', 'Listusers', 'sysop' );
        }
}

/**
 * Redirect page: Special:ListBots --> Special:ListUsers/bot.
 *
 * @ingroup SpecialPage
 */
class SpecialListBots extends SpecialRedirectToSpecial {
        function __construct() {
                parent::__construct( 'Listbots', 'Listusers', 'bot' );
        }
}