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  * @ingroup Maintenance
  21  */
  22
  23 require_once( dirname(__FILE__) . '/Maintenance.php' );
  24
  25 class MigrateUserGroup extends Maintenance {
  26         public function __construct() {
  27                 parent::__construct();
  28                 $this->mDescription = "Re-assign users from an old group to a new one";
  29                 $this->addArg( 'oldgroup', 'Old user group key', true );
  30                 $this->addArg( 'newgroup', 'New user group key', true );
  31                 $this->setBatchSize( 200 );
  32         }
  33
  34         public function execute() {
  35                 $count = 0;
  36                 $oldGroup = $this->getArg( 0 );
  37                 $newGroup = $this->getArg( 1 );
  38                 $dbw = wfGetDB( DB_MASTER );
  39                 $start = $dbw->selectField( 'user_groups', 'MIN(ug_user)',
  40                         array('ug_group' => $oldGroup), __FUNCTION__ );
  41                 $end = $dbw->selectField( 'user_groups', 'MAX(ug_user)',
  42                         array('ug_group' => $oldGroup), __FUNCTION__ );
  43                 if( $start === null ) {
  44                         $this->error( "Nothing to do - no users in the '$oldGroup' group", true );
  45                 }
  46                 # Do remaining chunk
  47                 $end += $this->mBatchSize - 1;
  48                 $blockStart = $start;
  49                 $blockEnd = $start + $this->mBatchSize - 1;
  50                 // Migrate users over in batches...
  51                 while( $blockEnd <= $end ) {
  52                         $this->output( "Doing users $blockStart to $blockEnd\n" );
  53                         $dbw->begin();
  54                         $dbw->update( 'user_groups',
  55                                 array('ug_group' => $newGroup),
  56                                 array('ug_group' => $oldGroup,
  57                                         "ug_user BETWEEN $blockStart AND $blockEnd" )
  58                         );
  59                         $count += $dbw->affectedRows();
  60                         $dbw->commit();
  61                         $blockStart += $this->mBatchSize;
  62                         $blockEnd += $this->mBatchSize;
  63                         wfWaitForSlaves( 5 );
  64                 }
  65                 $this->output( "Done! $count user(s) in group '$oldGroup' are now in '$newGroup' instead.\n" );
  66         }
  67 }
  68
  69 $maintClass = "MigrateUserGroup";
  70 require_once( DO_MAINTENANCE );