maintenance/migrateUserGroup.php

   1 <?php
   2 /**
   3  * Re-assign users from an old group to a new one
   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  * @ingroup Maintenance
  22  */
  23
  24 require_once __DIR__ . '/Maintenance.php';
  25
  26 /**
  27  * Maintenance script that re-assigns users from an old group to a new one.
  28  *
  29  * @ingroup Maintenance
  30  */
  31 class MigrateUserGroup extends Maintenance {
  32         public function __construct() {
  33                 parent::__construct();
  34                 $this->mDescription = "Re-assign users from an old group to a new one";
  35                 $this->addArg( 'oldgroup', 'Old user group key', true );
  36                 $this->addArg( 'newgroup', 'New user group key', true );
  37                 $this->setBatchSize( 200 );
  38         }
  39
  40         public function execute() {
  41                 $count = 0;
  42                 $oldGroup = $this->getArg( 0 );
  43                 $newGroup = $this->getArg( 1 );
  44                 $dbw = wfGetDB( DB_MASTER );
  45                 $start = $dbw->selectField( 'user_groups', 'MIN(ug_user)',
  46                         array( 'ug_group' => $oldGroup ), __FUNCTION__ );
  47                 $end = $dbw->selectField( 'user_groups', 'MAX(ug_user)',
  48                         array( 'ug_group' => $oldGroup ), __FUNCTION__ );
  49                 if ( $start === null ) {
  50                         $this->error( "Nothing to do - no users in the '$oldGroup' group", true );
  51                 }
  52                 # Do remaining chunk
  53                 $end += $this->mBatchSize - 1;
  54                 $blockStart = $start;
  55                 $blockEnd = $start + $this->mBatchSize - 1;
  56                 // Migrate users over in batches...
  57                 while ( $blockEnd <= $end ) {
  58                         $affected = 0;
  59                         $this->output( "Doing users $blockStart to $blockEnd\n" );
  60
  61                         $dbw->begin( __METHOD__ );
  62                         $dbw->update( 'user_groups',
  63                                 array( 'ug_group' => $newGroup ),
  64                                 array( 'ug_group' => $oldGroup,
  65                                         "ug_user BETWEEN $blockStart AND $blockEnd" ),
  66                                 __METHOD__,
  67                                 array( 'IGNORE' )
  68                         );
  69                         $affected += $dbw->affectedRows();
  70                         // Delete rows that the UPDATE operation above had to ignore.
  71                         // This happens when a user is in both the old and new group.
  72                         // Updating the row for the old group membership failed since
  73                         // user/group is UNIQUE.
  74                         $dbw->delete( 'user_groups',
  75                                 array( 'ug_group' => $oldGroup,
  76                                         "ug_user BETWEEN $blockStart AND $blockEnd" ),
  77                                 __METHOD__
  78                         );
  79                         $affected += $dbw->affectedRows();
  80                         $dbw->commit( __METHOD__ );
  81
  82                         // Clear cache for the affected users (bug 40340)
  83                         if ( $affected > 0 ) {
  84                                 // XXX: This also invalidates cache of unaffected users that
  85                                 // were in the new group and not in the group.
  86                                 $res = $dbw->select( 'user_groups', 'ug_user',
  87                                         array( 'ug_group' => $newGroup,
  88                                                 "ug_user BETWEEN $blockStart AND $blockEnd" ),
  89                                         __METHOD__
  90                                 );
  91                                 if ( $res !== false ) {
  92                                         foreach ( $res as $row ) {
  93                                                 $user = User::newFromId( $row->ug_user );
  94                                                 $user->invalidateCache();
  95                                         }
  96                                 }
  97                         }
  98
  99                         $count += $affected;
 100                         $blockStart += $this->mBatchSize;
 101                         $blockEnd += $this->mBatchSize;
 102                         wfWaitForSlaves();
 103                 }
 104                 $this->output( "Done! $count users in group '$oldGroup' are now in '$newGroup' instead.\n" );
 105         }
 106 }
 107
 108 $maintClass = "MigrateUserGroup";
 109 require_once RUN_MAINTENANCE_IF_MAIN;