includes/api/ApiQueryAllUsers.php

   1 <?php
   2
   3 /**
   4  * Created on July 7, 2007
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright © 2007 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23  * http://www.gnu.org/copyleft/gpl.html
  24  */
  25
  26 if ( !defined( 'MEDIAWIKI' ) ) {
  27         // Eclipse helper - will be ignored in production
  28         require_once( 'ApiQueryBase.php' );
  29 }
  30
  31 /**
  32  * Query module to enumerate all registered users.
  33  *
  34  * @ingroup API
  35  */
  36 class ApiQueryAllUsers extends ApiQueryBase {
  37
  38         public function __construct( $query, $moduleName ) {
  39                 parent::__construct( $query, $moduleName, 'au' );
  40         }
  41
  42         public function execute() {
  43                 $db = $this->getDB();
  44                 $params = $this->extractRequestParams();
  45
  46                 $prop = $params['prop'];
  47                 if ( !is_null( $prop ) ) {
  48                         $prop = array_flip( $prop );
  49                         $fld_blockinfo = isset( $prop['blockinfo'] );
  50                         $fld_editcount = isset( $prop['editcount'] );
  51                         $fld_groups = isset( $prop['groups'] );
  52                         $fld_registration = isset( $prop['registration'] );
  53                 } else {
  54                         $fld_blockinfo = $fld_editcount = $fld_groups = $fld_registration = false;
  55                 }
  56
  57                 $limit = $params['limit'];
  58                 $this->addTables( 'user', 'u1' );
  59                 $useIndex = true;
  60
  61                 if ( !is_null( $params['from'] ) ) {
  62                         $this->addWhere( 'u1.user_name >= ' . $db->addQuotes( $this->keyToTitle( $params['from'] ) ) );
  63                 }
  64
  65                 if ( !is_null( $params['prefix'] ) ) {
  66                         $this->addWhere( 'u1.user_name' . $db->buildLike( $this->keyToTitle( $params['prefix'] ), $db->anyString() ) );
  67                 }
  68
  69                 if ( !is_null( $params['group'] ) ) {
  70                         $useIndex = false;
  71                         // Filter only users that belong to a given group
  72                         $this->addTables( 'user_groups', 'ug1' );
  73                         $ug1 = $this->getAliasedName( 'user_groups', 'ug1' );
  74                         $this->addJoinConds( array( $ug1 => array( 'INNER JOIN', array( 'ug1.ug_user=u1.user_id',
  75                                         'ug1.ug_group' => $params['group'] ) ) ) );
  76                 }
  77
  78                 if ( $params['witheditsonly'] ) {
  79                         $this->addWhere( 'user_editcount > 0' );
  80                 }
  81
  82                 if ( $fld_groups ) {
  83                         // Show the groups the given users belong to
  84                         // request more than needed to avoid not getting all rows that belong to one user
  85                         $groupCount = count( User::getAllGroups() );
  86                         $sqlLimit = $limit + $groupCount + 1;
  87
  88                         $this->addTables( 'user_groups', 'ug2' );
  89                         $tname = $this->getAliasedName( 'user_groups', 'ug2' );
  90                         $this->addJoinConds( array( $tname => array( 'LEFT JOIN', 'ug2.ug_user=u1.user_id' ) ) );
  91                         $this->addFields( 'ug2.ug_group ug_group2' );
  92                 } else {
  93                         $sqlLimit = $limit + 1;
  94                 }
  95                 if ( $fld_blockinfo ) {
  96                         $this->addTables( 'ipblocks' );
  97                         $this->addTables( 'user', 'u2' );
  98                         $u2 = $this->getAliasedName( 'user', 'u2' );
  99                         $this->addJoinConds( array(
 100                                 'ipblocks' => array( 'LEFT JOIN', 'ipb_user=u1.user_id' ),
 101                                 $u2 => array( 'LEFT JOIN', 'ipb_by=u2.user_id' ) ) );
 102                         $this->addFields( array( 'ipb_reason', 'u2.user_name AS blocker_name' ) );
 103                 }
 104
 105                 $this->addOption( 'LIMIT', $sqlLimit );
 106
 107                 $this->addFields( 'u1.user_name' );
 108                 $this->addFieldsIf( 'u1.user_editcount', $fld_editcount );
 109                 $this->addFieldsIf( 'u1.user_registration', $fld_registration );
 110
 111                 $this->addOption( 'ORDER BY', 'u1.user_name' );
 112                 if ( $useIndex ) {
 113                         $u1 = $this->getAliasedName( 'user', 'u1' );
 114                         $this->addOption( 'USE INDEX', array( $u1 => 'user_name' ) );
 115                 }
 116
 117                 $res = $this->select( __METHOD__ );
 118
 119                 $data = array();
 120                 $count = 0;
 121                 $lastUserData = false;
 122                 $lastUser = false;
 123                 $result = $this->getResult();
 124
 125                 //
 126                 // This loop keeps track of the last entry.
 127                 // For each new row, if the new row is for different user then the last, the last entry is added to results.
 128                 // Otherwise, the group of the new row is appended to the last entry.
 129                 // The setContinue... is more complex because of this, and takes into account the higher sql limit
 130                 // to make sure all rows that belong to the same user are received.
 131                 //
 132                 while ( true ) {
 133                         $row = $db->fetchObject( $res );
 134                         $count++;
 135
 136                         if ( !$row || $lastUser !== $row->user_name ) {
 137                                 // Save the last pass's user data
 138                                 if ( is_array( $lastUserData ) ) {
 139                                         $fit = $result->addValue( array( 'query', $this->getModuleName() ),
 140                                                         null, $lastUserData );
 141                                         if ( !$fit ) {
 142                                                 $this->setContinueEnumParameter( 'from',
 143                                                                 $this->keyToTitle( $lastUserData['name'] ) );
 144                                                 break;
 145                                         }
 146                                 }
 147
 148                                 // No more rows left
 149                                 if ( !$row ) {
 150                                         break;
 151                                 }
 152
 153                                 if ( $count > $limit ) {
 154                                         // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 155                                         $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->user_name ) );
 156                                         break;
 157                                 }
 158
 159                                 // Record new user's data
 160                                 $lastUser = $row->user_name;
 161                                 $lastUserData = array( 'name' => $lastUser );
 162                                 if ( $fld_blockinfo ) {
 163                                         $lastUserData['blockedby'] = $row->blocker_name;
 164                                         $lastUserData['blockreason'] = $row->ipb_reason;
 165                                 }
 166                                 if ( $fld_editcount ) {
 167                                         $lastUserData['editcount'] = intval( $row->user_editcount );
 168                                 }
 169                                 if ( $fld_registration ) {
 170                                         $lastUserData['registration'] = $row->user_registration ?
 171                                                 wfTimestamp( TS_ISO_8601, $row->user_registration ) : '';
 172                                 }
 173
 174                         }
 175
 176                         if ( $sqlLimit == $count ) {
 177                                 // BUG!  database contains group name that User::getAllGroups() does not return
 178                                 // TODO: should handle this more gracefully
 179                                 ApiBase::dieDebug( __METHOD__,
 180                                         'MediaWiki configuration error: the database contains more user groups than known to User::getAllGroups() function' );
 181                         }
 182
 183                         // Add user's group info
 184                         if ( $fld_groups && !is_null( $row->ug_group2 ) ) {
 185                                 $lastUserData['groups'][] = $row->ug_group2;
 186                                 $result->setIndexedTagName( $lastUserData['groups'], 'g' );
 187                         }
 188                 }
 189
 190                 $db->freeResult( $res );
 191
 192                 $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'u' );
 193         }
 194
 195         public function getAllowedParams() {
 196                 return array(
 197                         'from' => null,
 198                         'prefix' => null,
 199                         'group' => array(
 200                                 ApiBase::PARAM_TYPE => User::getAllGroups()
 201                         ),
 202                         'prop' => array(
 203                                 ApiBase::PARAM_ISMULTI => true,
 204                                 ApiBase::PARAM_TYPE => array(
 205                                         'blockinfo',
 206                                         'groups',
 207                                         'editcount',
 208                                         'registration'
 209                                 )
 210                         ),
 211                         'limit' => array(
 212                                 ApiBase::PARAM_DFLT => 10,
 213                                 ApiBase::PARAM_TYPE => 'limit',
 214                                 ApiBase::PARAM_MIN => 1,
 215                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 216                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 217                         ),
 218                         'witheditsonly' => false,
 219                 );
 220         }
 221
 222         public function getParamDescription() {
 223                 return array(
 224                         'from' => 'The user name to start enumerating from',
 225                         'prefix' => 'Search for all page titles that begin with this value',
 226                         'group' => 'Limit users to a given group name',
 227                         'prop' => array(
 228                                 'What pieces of information to include.',
 229                                 '`groups` property uses more server resources and may return fewer results than the limit' ),
 230                         'limit' => 'How many total user names to return',
 231                         'witheditsonly' => 'Only list users who have made edits',
 232                 );
 233         }
 234
 235         public function getDescription() {
 236                 return 'Enumerate all registered users';
 237         }
 238
 239         protected function getExamples() {
 240                 return array(
 241                         'api.php?action=query&list=allusers&aufrom=Y',
 242                 );
 243         }
 244
 245         public function getVersion() {
 246                 return __CLASS__ . ': $Id$';
 247         }
 248 }