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[autoinstalls/mediawiki.git] / 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( RUN_MAINTENANCE_IF_MAIN );