includes/api/ApiQueryAllUsers.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on July 7, 2007
   6  *
   7  * Copyright © 2007 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 if ( !defined( 'MEDIAWIKI' ) ) {
  28         // Eclipse helper - will be ignored in production
  29         require_once( 'ApiQueryBase.php' );
  30 }
  31
  32 /**
  33  * Query module to enumerate all registered users.
  34  *
  35  * @ingroup API
  36  */
  37 class ApiQueryAllUsers extends ApiQueryBase {
  38
  39         public function __construct( $query, $moduleName ) {
  40                 parent::__construct( $query, $moduleName, 'au' );
  41         }
  42
  43         public function execute() {
  44                 $db = $this->getDB();
  45                 $params = $this->extractRequestParams();
  46
  47                 $prop = $params['prop'];
  48                 if ( !is_null( $prop ) ) {
  49                         $prop = array_flip( $prop );
  50                         $fld_blockinfo = isset( $prop['blockinfo'] );
  51                         $fld_editcount = isset( $prop['editcount'] );
  52                         $fld_groups = isset( $prop['groups'] );
  53                         $fld_rights = isset( $prop['rights'] );
  54                         $fld_registration = isset( $prop['registration'] );
  55                 } else {
  56                         $fld_blockinfo = $fld_editcount = $fld_groups = $fld_registration = false;
  57                 }
  58
  59                 $limit = $params['limit'];
  60                 $this->addTables( 'user', 'u1' );
  61                 $useIndex = true;
  62
  63                 if ( !is_null( $params['from'] ) ) {
  64                         $this->addWhere( 'u1.user_name >= ' . $db->addQuotes( $this->keyToTitle( $params['from'] ) ) );
  65                 }
  66                 if ( !is_null( $params['to'] ) ) {
  67                         $this->addWhere( 'u1.user_name <= ' . $db->addQuotes( $this->keyToTitle( $params['to'] ) ) );
  68                 }
  69
  70                 if ( !is_null( $params['prefix'] ) ) {
  71                         $this->addWhere( 'u1.user_name' . $db->buildLike( $this->keyToTitle( $params['prefix'] ), $db->anyString() ) );
  72                 }
  73
  74                 if ( !is_null( $params['group'] ) ) {
  75                         $useIndex = false;
  76                         // Filter only users that belong to a given group
  77                         $this->addTables( 'user_groups', 'ug1' );
  78                         $ug1 = $this->getAliasedName( 'user_groups', 'ug1' );
  79                         $this->addJoinConds( array( $ug1 => array( 'INNER JOIN', array( 'ug1.ug_user=u1.user_id',
  80                                         'ug1.ug_group' => $params['group'] ) ) ) );
  81                 }
  82
  83                 if ( $params['witheditsonly'] ) {
  84                         $this->addWhere( 'u1.user_editcount > 0' );
  85                 }
  86
  87                 if ( $fld_groups || $fld_rights ) {
  88                         // Show the groups the given users belong to
  89                         // request more than needed to avoid not getting all rows that belong to one user
  90                         $groupCount = count( User::getAllGroups() );
  91                         $sqlLimit = $limit + $groupCount + 1;
  92
  93                         $this->addTables( 'user_groups', 'ug2' );
  94                         $tname = $this->getAliasedName( 'user_groups', 'ug2' );
  95                         $this->addJoinConds( array( $tname => array( 'LEFT JOIN', 'ug2.ug_user=u1.user_id' ) ) );
  96                         $this->addFields( 'ug2.ug_group ug_group2' );
  97                 } else {
  98                         $sqlLimit = $limit + 1;
  99                 }
 100                 if ( $fld_blockinfo ) {
 101                         $this->addTables( 'ipblocks' );
 102                         $this->addTables( 'user', 'u2' );
 103                         $u2 = $this->getAliasedName( 'user', 'u2' );
 104                         $this->addJoinConds( array(
 105                                 'ipblocks' => array( 'LEFT JOIN', 'ipb_user=u1.user_id' ),
 106                                 $u2 => array( 'LEFT JOIN', 'ipb_by=u2.user_id' ) ) );
 107                         $this->addFields( array( 'ipb_reason', 'u2.user_name AS blocker_name' ) );
 108                 }
 109
 110                 $this->addOption( 'LIMIT', $sqlLimit );
 111
 112                 $this->addFields( array(
 113                         'u1.user_name',
 114                         'u1.user_id'
 115                 ) );
 116                 $this->addFieldsIf( 'u1.user_editcount', $fld_editcount );
 117                 $this->addFieldsIf( 'u1.user_registration', $fld_registration );
 118
 119                 $this->addOption( 'ORDER BY', 'u1.user_name' );
 120                 if ( $useIndex ) {
 121                         $u1 = $this->getAliasedName( 'user', 'u1' );
 122                         $this->addOption( 'USE INDEX', array( $u1 => 'user_name' ) );
 123                 }
 124
 125                 $res = $this->select( __METHOD__ );
 126
 127                 $count = 0;
 128                 $lastUserData = false;
 129                 $lastUser = false;
 130                 $result = $this->getResult();
 131
 132                 //
 133                 // This loop keeps track of the last entry.
 134                 // For each new row, if the new row is for different user then the last, the last entry is added to results.
 135                 // Otherwise, the group of the new row is appended to the last entry.
 136                 // The setContinue... is more complex because of this, and takes into account the higher sql limit
 137                 // to make sure all rows that belong to the same user are received.
 138
 139                 foreach ( $res as $row ) {
 140                         $count++;
 141
 142                         if ( $lastUser !== $row->user_name ) {
 143                                 // Save the last pass's user data
 144                                 if ( is_array( $lastUserData ) ) {
 145                                         $fit = $result->addValue( array( 'query', $this->getModuleName() ),
 146                                                         null, $lastUserData );
 147                                         if ( !$fit ) {
 148                                                 $this->setContinueEnumParameter( 'from',
 149                                                                 $this->keyToTitle( $lastUserData['name'] ) );
 150                                                 break;
 151                                         }
 152                                 }
 153
 154                                 if ( $count > $limit ) {
 155                                         // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 156                                         $this->setContinueEnumParameter( 'from', $this->keyToTitle( $row->user_name ) );
 157                                         break;
 158                                 }
 159
 160                                 // Record new user's data
 161                                 $lastUser = $row->user_name;
 162                                 $lastUserData = array(
 163                                         'name' => $lastUser,
 164                                         'userid' => $row->user_id,
 165                                 );
 166                                 if ( $fld_blockinfo && !is_null( $row->blocker_name ) ) {
 167                                         $lastUserData['blockedby'] = $row->blocker_name;
 168                                         $lastUserData['blockreason'] = $row->ipb_reason;
 169                                 }
 170                                 if ( $fld_editcount ) {
 171                                         $lastUserData['editcount'] = intval( $row->user_editcount );
 172                                 }
 173                                 if ( $fld_registration ) {
 174                                         $lastUserData['registration'] = $row->user_registration ?
 175                                                 wfTimestamp( TS_ISO_8601, $row->user_registration ) : '';
 176                                 }
 177
 178                         }
 179
 180                         if ( $sqlLimit == $count ) {
 181                                 // BUG!  database contains group name that User::getAllGroups() does not return
 182                                 // TODO: should handle this more gracefully
 183                                 ApiBase::dieDebug( __METHOD__,
 184                                         'MediaWiki configuration error: the database contains more user groups than known to User::getAllGroups() function' );
 185                         }
 186
 187                         // Add user's group info
 188                         if ( $fld_groups && !is_null( $row->ug_group2 ) ) {
 189                                 $lastUserData['groups'][] = $row->ug_group2;
 190                                 $result->setIndexedTagName( $lastUserData['groups'], 'g' );
 191                         }
 192
 193                     if ( $fld_rights && !is_null( $row->ug_group2 ) ) {
 194                                 if ( !isset( $lastUserData['rights'] ) ) {
 195                                         $lastUserData['rights'] = User::getGroupPermissions( User::getImplicitGroups() );
 196                             }
 197
 198                         $lastUserData['rights'] = array_merge( $lastUserData['rights'], User::getGroupPermissions( array( $row->ug_group2 ) ) );
 199                         $result->setIndexedTagName( $lastUserData['rights'], 'r' );
 200                     }
 201                 }
 202
 203                 if ( is_array( $lastUserData ) ) {
 204                         $fit = $result->addValue( array( 'query', $this->getModuleName() ),
 205                                 null, $lastUserData );
 206                         if ( !$fit ) {
 207                                 $this->setContinueEnumParameter( 'from',
 208                                         $this->keyToTitle( $lastUserData['name'] ) );
 209                         }
 210                 }
 211
 212                 $result->setIndexedTagName_internal( array( 'query', $this->getModuleName() ), 'u' );
 213         }
 214
 215         public function getCacheMode( $params ) {
 216                 return 'public';
 217         }
 218
 219         public function getAllowedParams() {
 220                 return array(
 221                         'from' => null,
 222                         'to' => null,
 223                         'prefix' => null,
 224                         'group' => array(
 225                                 ApiBase::PARAM_TYPE => User::getAllGroups()
 226                         ),
 227                         'prop' => array(
 228                                 ApiBase::PARAM_ISMULTI => true,
 229                                 ApiBase::PARAM_TYPE => array(
 230                                         'blockinfo',
 231                                         'groups',
 232                                         'editcount',
 233                                         'registration'
 234                                 )
 235                         ),
 236                         'limit' => array(
 237                                 ApiBase::PARAM_DFLT => 10,
 238                                 ApiBase::PARAM_TYPE => 'limit',
 239                                 ApiBase::PARAM_MIN => 1,
 240                                 ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
 241                                 ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
 242                         ),
 243                         'witheditsonly' => false,
 244                 );
 245         }
 246
 247         public function getParamDescription() {
 248                 return array(
 249                         'from' => 'The user name to start enumerating from',
 250                         'to' => 'The user name to stop enumerating at',
 251                         'prefix' => 'Search for all users that begin with this value',
 252                         'group' => 'Limit users to a given group name',
 253                         'prop' => array(
 254                                 'What pieces of information to include.',
 255                                 ' blockinfo     - Adds the information about a current block on the user',
 256                                 ' groups        - Lists groups that the user is in. This uses more server resources and may return fewer results than the limit',
 257                                 ' rights        - Lists groups that the user has',
 258                                 ' editcount     - Adds the edit count of the user',
 259                                 ' registration  - Adds the timestamp of when the user registered',
 260                                 ),
 261                         'limit' => 'How many total user names to return',
 262                         'witheditsonly' => 'Only list users who have made edits',
 263                 );
 264         }
 265
 266         public function getDescription() {
 267                 return 'Enumerate all registered users';
 268         }
 269
 270         protected function getExamples() {
 271                 return array(
 272                         'api.php?action=query&list=allusers&aufrom=Y',
 273                 );
 274         }
 275
 276         public function getVersion() {
 277                 return __CLASS__ . ': $Id$';
 278         }
 279 }