includes/user/LocalIdLookup.php

   1 <?php
   2 /**
   3  * A central user id lookup service implementation
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * A CentralIdLookup provider that just uses local IDs. Useful if the wiki
  25  * isn't part of a cluster or you're using shared user tables.
  26  *
  27  * @note Shared user table support expects that all wikis involved have
  28  *  $wgSharedDB and $wgSharedTables set, and that all wikis involved in the
  29  *  sharing are listed in $wgLocalDatabases, and that no wikis not involved in
  30  *  the sharing are listed in $wgLocalDatabases.
  31  * @since 1.27
  32  */
  33 class LocalIdLookup extends CentralIdLookup {
  34
  35         public function isAttached( User $user, $wikiId = null ) {
  36                 global $wgSharedDB, $wgSharedTables, $wgLocalDatabases;
  37
  38                 // If the user has no ID, it can't be attached
  39                 if ( !$user->getId() ) {
  40                         return false;
  41                 }
  42
  43                 // Easy case, we're checking locally
  44                 if ( $wikiId === null || $wikiId === wfWikiID() ) {
  45                         return true;
  46                 }
  47
  48                 // Assume that shared user tables are set up as described above, if
  49                 // they're being used at all.
  50                 return $wgSharedDB !== null &&
  51                         in_array( 'user', $wgSharedTables, true ) &&
  52                         in_array( $wikiId, $wgLocalDatabases, true );
  53         }
  54
  55         public function lookupCentralIds(
  56                 array $idToName, $audience = self::AUDIENCE_PUBLIC, $flags = self::READ_NORMAL
  57         ) {
  58                 if ( !$idToName ) {
  59                         return [];
  60                 }
  61
  62                 $audience = $this->checkAudience( $audience );
  63                 list( $index, $options ) = DBAccessObjectUtils::getDBOptions( $flags );
  64                 $db = wfGetDB( $index );
  65
  66                 $tables = [ 'user' ];
  67                 $fields = [ 'user_id', 'user_name' ];
  68                 $where = [
  69                         'user_id' => array_map( 'intval', array_keys( $idToName ) ),
  70                 ];
  71                 $join = [];
  72                 if ( $audience && !$audience->isAllowed( 'hideuser' ) ) {
  73                         $tables[] = 'ipblocks';
  74                         $join['ipblocks'] = [ 'LEFT JOIN', 'ipb_user=user_id' ];
  75                         $fields[] = 'ipb_deleted';
  76                 }
  77
  78                 $res = $db->select( $tables, $fields, $where, __METHOD__, $options, $join );
  79                 foreach ( $res as $row ) {
  80                         $idToName[$row->user_id] = empty( $row->ipb_deleted ) ? $row->user_name : '';
  81                 }
  82
  83                 return $idToName;
  84         }
  85
  86         public function lookupUserNames(
  87                 array $nameToId, $audience = self::AUDIENCE_PUBLIC, $flags = self::READ_NORMAL
  88         ) {
  89                 if ( !$nameToId ) {
  90                         return [];
  91                 }
  92
  93                 $audience = $this->checkAudience( $audience );
  94                 list( $index, $options ) = DBAccessObjectUtils::getDBOptions( $flags );
  95                 $db = wfGetDB( $index );
  96
  97                 $tables = [ 'user' ];
  98                 $fields = [ 'user_id', 'user_name' ];
  99                 $where = [
 100                         'user_name' => array_map( 'strval', array_keys( $nameToId ) ),
 101                 ];
 102                 $join = [];
 103                 if ( $audience && !$audience->isAllowed( 'hideuser' ) ) {
 104                         $tables[] = 'ipblocks';
 105                         $join['ipblocks'] = [ 'LEFT JOIN', 'ipb_user=user_id' ];
 106                         $where[] = 'ipb_deleted = 0 OR ipb_deleted IS NULL';
 107                 }
 108
 109                 $res = $db->select( $tables, $fields, $where, __METHOD__, $options, $join );
 110                 foreach ( $res as $row ) {
 111                         $nameToId[$row->user_name] = (int)$row->user_id;
 112                 }
 113
 114                 return $nameToId;
 115         }
 116 }