includes/api/ApiQueryAllUsers.php

   1 <?php
   2
   3 /*
   4  * Created on July 7, 2007
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright (C) 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
  60                 if( !is_null( $params['from'] ) )
  61                         $this->addWhere( 'u1.user_name >= ' . $db->addQuotes( $this->keyToTitle( $params['from'] ) ) );
  62
  63                 if( isset( $params['prefix'] ) )
  64                         $this->addWhere( 'u1.user_name LIKE "' . $db->escapeLike( $this->keyToTitle( $params['prefix'] ) ) . '%"' );
  65
  66                 if (!is_null($params['group'])) {
  67                         // Filter only users that belong to a given group
  68                         $this->addTables('user_groups', 'ug1');
  69                         $this->addWhere('ug1.ug_user=u1.user_id');
  70                         $this->addWhereFld('ug1.ug_group', $params['group']);
  71                 }
  72
  73                 if ($fld_groups) {
  74                         // Show the groups the given users belong to
  75                         // request more than needed to avoid not getting all rows that belong to one user
  76                         $groupCount = count(User::getAllGroups());
  77                         $sqlLimit = $limit+$groupCount+1;
  78
  79                         $this->addTables('user_groups', 'ug2');
  80                         $tname = $this->getAliasedName('user_groups', 'ug2');
  81                         $this->addJoinConds(array($tname => array('LEFT JOIN', 'ug2.ug_user=u1.user_id')));
  82                         $this->addFields('ug2.ug_group ug_group2');
  83                 } else {
  84                         $sqlLimit = $limit+1;
  85                 }
  86                 if ($fld_blockinfo) {
  87                         $this->addTables('ipblocks');
  88                         $this->addTables('user', 'u2');
  89                         $u2 = $this->getAliasedName('user', 'u2');
  90                         $this->addJoinConds(array(
  91                                 'ipblocks' => array('LEFT JOIN', 'ipb_user=u1.user_id'),
  92                                 $u2 => array('LEFT JOIN', 'ipb_by=u2.user_id')));
  93                         $this->addFields(array('ipb_reason', 'u2.user_name blocker_name'));
  94                 }
  95
  96                 $this->addOption('LIMIT', $sqlLimit);
  97
  98                 $this->addFields('u1.user_name');
  99                 $this->addFieldsIf('u1.user_editcount', $fld_editcount);
 100                 $this->addFieldsIf('u1.user_registration', $fld_registration);
 101
 102                 $this->addOption('ORDER BY', 'u1.user_name');
 103
 104                 $res = $this->select(__METHOD__);
 105
 106                 $data = array ();
 107                 $count = 0;
 108                 $lastUserData = false;
 109                 $lastUser = false;
 110                 $result = $this->getResult();
 111
 112                 //
 113                 // This loop keeps track of the last entry.
 114                 // For each new row, if the new row is for different user then the last, the last entry is added to results.
 115                 // Otherwise, the group of the new row is appended to the last entry.
 116                 // The setContinue... is more complex because of this, and takes into account the higher sql limit
 117                 // to make sure all rows that belong to the same user are received.
 118                 //
 119                 while (true) {
 120
 121                         $row = $db->fetchObject($res);
 122                         $count++;
 123
 124                         if (!$row || $lastUser !== $row->user_name) {
 125                                 // Save the last pass's user data
 126                                 if (is_array($lastUserData))
 127                                         $data[] = $lastUserData;
 128
 129                                 // No more rows left
 130                                 if (!$row)
 131                                         break;
 132
 133                                 if ($count > $limit) {
 134                                         // We've reached the one extra which shows that there are additional pages to be had. Stop here...
 135                                         $this->setContinueEnumParameter('from', $this->keyToTitle($row->user_name));
 136                                         break;
 137                                 }
 138
 139                                 // Record new user's data
 140                                 $lastUser = $row->user_name;
 141                                 $lastUserData = array( 'name' => $lastUser );
 142                                 if ($fld_blockinfo) {
 143                                         $lastUserData['blockedby'] = $row->blocker_name;
 144                                         $lastUserData['blockreason'] = $row->ipb_reason;
 145                                 }
 146                                 if ($fld_editcount)
 147                                         $lastUserData['editcount'] = intval($row->user_editcount);
 148                                 if ($fld_registration)
 149                                         $lastUserData['registration'] = wfTimestamp(TS_ISO_8601, $row->user_registration);
 150
 151                         }
 152
 153                         if ($sqlLimit == $count) {
 154                                 // BUG!  database contains group name that User::getAllGroups() does not return
 155                                 // TODO: should handle this more gracefully
 156                                 ApiBase :: dieDebug(__METHOD__,
 157                                         'MediaWiki configuration error: the database contains more user groups than known to User::getAllGroups() function');
 158                         }
 159
 160                         // Add user's group info
 161                         if ($fld_groups && !is_null($row->ug_group2)) {
 162                                 $lastUserData['groups'][] = $row->ug_group2;
 163                                 $result->setIndexedTagName($lastUserData['groups'], 'g');
 164                         }
 165                 }
 166
 167                 $db->freeResult($res);
 168
 169                 $result->setIndexedTagName($data, 'u');
 170                 $result->addValue('query', $this->getModuleName(), $data);
 171         }
 172
 173         public function getAllowedParams() {
 174                 return array (
 175                         'from' => null,
 176                         'prefix' => null,
 177                         'group' => array(
 178                                 ApiBase :: PARAM_TYPE => User::getAllGroups()
 179                         ),
 180                         'prop' => array (
 181                                 ApiBase :: PARAM_ISMULTI => true,
 182                                 ApiBase :: PARAM_TYPE => array (
 183                                         'blockinfo',
 184                                         'groups',
 185                                         'editcount',
 186                                         'registration'
 187                                 )
 188                         ),
 189                         'limit' => array (
 190                                 ApiBase :: PARAM_DFLT => 10,
 191                                 ApiBase :: PARAM_TYPE => 'limit',
 192                                 ApiBase :: PARAM_MIN => 1,
 193                                 ApiBase :: PARAM_MAX => ApiBase :: LIMIT_BIG1,
 194                                 ApiBase :: PARAM_MAX2 => ApiBase :: LIMIT_BIG2
 195                         )
 196                 );
 197         }
 198
 199         public function getParamDescription() {
 200                 return array (
 201                         'from' => 'The user name to start enumerating from.',
 202                         'prefix' => 'Search for all page titles that begin with this value.',
 203                         'group' => 'Limit users to a given group name',
 204                         'prop' => array(
 205                                 'What pieces of information to include.',
 206                                 '`groups` property uses more server resources and may return fewer results than the limit.'),
 207                         'limit' => 'How many total user names to return.',
 208                 );
 209         }
 210
 211         public function getDescription() {
 212                 return 'Enumerate all registered users';
 213         }
 214
 215         protected function getExamples() {
 216                 return array (
 217                         'api.php?action=query&list=allusers&aufrom=Y',
 218                 );
 219         }
 220
 221         public function getVersion() {
 222                 return __CLASS__ . ': $Id: ApiQueryAllUsers.php 44472 2008-12-11 21:51:01Z catrope $';
 223         }
 224 }