1 files changed, 70 insertions, 0 deletions
diff --git a/maintenance/migrateUserGroup.php b/maintenance/migrateUserGroup.php
new file mode 100644
index 00000000..6d584f7d
--- /dev/null
+++ b/maintenance/migrateUserGroup.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * Re-assign users from an old group to a new one
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @ingroup Maintenance
+ */
+
+require_once( dirname(__FILE__) . '/Maintenance.php' );
+
+class MigrateUserGroup extends Maintenance {
+	public function __construct() {
+		parent::__construct();
+		$this->mDescription = "Re-assign users from an old group to a new one";
+		$this->addArg( 'oldgroup', 'Old user group key', true );
+		$this->addArg( 'newgroup', 'New user group key', true );
+		$this->setBatchSize( 200 );
+	}
+
+	public function execute() {
+		$count = 0;
+		$oldGroup = $this->getArg( 0 );
+		$newGroup = $this->getArg( 1 );
+		$dbw = wfGetDB( DB_MASTER );
+		$start = $dbw->selectField( 'user_groups', 'MIN(ug_user)',
+			array('ug_group' => $oldGroup), __FUNCTION__ );
+		$end = $dbw->selectField( 'user_groups', 'MAX(ug_user)',
+			array('ug_group' => $oldGroup), __FUNCTION__ );
+		if( $start === null ) {
+			$this->error( "Nothing to do - no users in the '$oldGroup' group", true );
+		}
+		# Do remaining chunk
+		$end += $this->mBatchSize - 1;
+		$blockStart = $start;
+		$blockEnd = $start + $this->mBatchSize - 1;
+		// Migrate users over in batches...
+		while( $blockEnd <= $end ) {
+			$this->output( "Doing users $blockStart to $blockEnd\n" );
+			$dbw->begin();
+			$dbw->update( 'user_groups',
+				array('ug_group' => $newGroup),
+				array('ug_group' => $oldGroup,
+					"ug_user BETWEEN $blockStart AND $blockEnd" )
+			);
+			$count += $dbw->affectedRows();
+			$dbw->commit();
+			$blockStart += $this->mBatchSize;
+			$blockEnd += $this->mBatchSize;
+			wfWaitForSlaves( 5 );
+		}
+		$this->output( "Done! $count user(s) in group '$oldGroup' are now in '$newGroup' instead.\n" );
+	}
+}
+
+$maintClass = "MigrateUserGroup";
+require_once( DO_MAINTENANCE );