1 files changed, 232 insertions, 0 deletions
diff --git a/www/wiki/maintenance/reassignEdits.php b/www/wiki/maintenance/reassignEdits.php
new file mode 100644
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+++ b/www/wiki/maintenance/reassignEdits.php
@@ -0,0 +1,232 @@
+<?php
+/**
+ * Reassign edits from a user or IP address to another user
+ *
+ * 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
+ *
+ * @file
+ * @ingroup Maintenance
+ * @author Rob Church <robchur@gmail.com>
+ * @license GNU General Public Licence 2.0 or later
+ */
+
+use Wikimedia\Rdbms\IDatabase;
+
+require_once __DIR__ . '/Maintenance.php';
+
+/**
+ * Maintenance script that reassigns edits from a user or IP address
+ * to another user.
+ *
+ * @ingroup Maintenance
+ */
+class ReassignEdits extends Maintenance {
+	public function __construct() {
+		parent::__construct();
+		$this->addDescription( 'Reassign edits from one user to another' );
+		$this->addOption( "force", "Reassign even if the target user doesn't exist" );
+		$this->addOption( "norc", "Don't update the recent changes table" );
+		$this->addOption( "report", "Print out details of what would be changed, but don't update it" );
+		$this->addArg( 'from', 'Old user to take edits from' );
+		$this->addArg( 'to', 'New user to give edits to' );
+	}
+
+	public function execute() {
+		if ( $this->hasArg( 0 ) && $this->hasArg( 1 ) ) {
+			# Set up the users involved
+			$from = $this->initialiseUser( $this->getArg( 0 ) );
+			$to = $this->initialiseUser( $this->getArg( 1 ) );
+
+			# If the target doesn't exist, and --force is not set, stop here
+			if ( $to->getId() || $this->hasOption( 'force' ) ) {
+				# Reassign the edits
+				$report = $this->hasOption( 'report' );
+				$this->doReassignEdits( $from, $to, !$this->hasOption( 'norc' ), $report );
+				# If reporting, and there were items, advise the user to run without --report
+				if ( $report ) {
+					$this->output( "Run the script again without --report to update.\n" );
+				}
+			} else {
+				$ton = $to->getName();
+				$this->error( "User '{$ton}' not found." );
+			}
+		}
+	}
+
+	/**
+	 * Reassign edits from one user to another
+	 *
+	 * @param User $from User to take edits from
+	 * @param User $to User to assign edits to
+	 * @param bool $rc Update the recent changes table
+	 * @param bool $report Don't change things; just echo numbers
+	 * @return int Number of entries changed, or that would be changed
+	 */
+	private function doReassignEdits( &$from, &$to, $rc = false, $report = false ) {
+		global $wgActorTableSchemaMigrationStage;
+
+		$dbw = $this->getDB( DB_MASTER );
+		$this->beginTransaction( $dbw, __METHOD__ );
+
+		# Count things
+		$this->output( "Checking current edits..." );
+		$revQueryInfo = ActorMigration::newMigration()->getWhere( $dbw, 'rev_user', $from );
+		$res = $dbw->select(
+			[ 'revision' ] + $revQueryInfo['tables'],
+			'COUNT(*) AS count',
+			$revQueryInfo['conds'],
+			__METHOD__,
+			[],
+			$revQueryInfo['joins']
+		);
+		$row = $dbw->fetchObject( $res );
+		$cur = $row->count;
+		$this->output( "found {$cur}.\n" );
+
+		$this->output( "Checking deleted edits..." );
+		$arQueryInfo = ActorMigration::newMigration()->getWhere( $dbw, 'ar_user', $from, false );
+		$res = $dbw->select(
+			[ 'archive' ] + $arQueryInfo['tables'],
+			'COUNT(*) AS count',
+			$arQueryInfo['conds'],
+			__METHOD__,
+			[],
+			$arQueryInfo['joins']
+		);
+		$row = $dbw->fetchObject( $res );
+		$del = $row->count;
+		$this->output( "found {$del}.\n" );
+
+		# Don't count recent changes if we're not supposed to
+		if ( $rc ) {
+			$this->output( "Checking recent changes..." );
+			$rcQueryInfo = ActorMigration::newMigration()->getWhere( $dbw, 'rc_user', $from, false );
+			$res = $dbw->select(
+				[ 'recentchanges' ] + $rcQueryInfo['tables'],
+				'COUNT(*) AS count',
+				$rcQueryInfo['conds'],
+				__METHOD__,
+				[],
+				$rcQueryInfo['joins']
+			);
+			$row = $dbw->fetchObject( $res );
+			$rec = $row->count;
+			$this->output( "found {$rec}.\n" );
+		} else {
+			$rec = 0;
+		}
+
+		$total = $cur + $del + $rec;
+		$this->output( "\nTotal entries to change: {$total}\n" );
+
+		if ( !$report ) {
+			if ( $total ) {
+				# Reassign edits
+				$this->output( "\nReassigning current edits..." );
+				if ( $wgActorTableSchemaMigrationStage < MIGRATION_NEW ) {
+					$dbw->update(
+						'revision',
+						[
+							'rev_user' => $to->getId(),
+							'rev_user_text' =>
+								$wgActorTableSchemaMigrationStage <= MIGRATION_WRITE_BOTH ? $to->getName() : ''
+						],
+						$from->isLoggedIn()
+							? [ 'rev_user' => $from->getId() ] : [ 'rev_user_text' => $from->getName() ],
+						__METHOD__
+					);
+				}
+				if ( $wgActorTableSchemaMigrationStage > MIGRATION_OLD ) {
+					$dbw->update(
+						'revision_actor_temp',
+						[ 'revactor_actor' => $to->getActorId( $dbw ) ],
+						[ 'revactor_actor' => $from->getActorId() ],
+						__METHOD__
+					);
+				}
+				$this->output( "done.\nReassigning deleted edits..." );
+				$dbw->update( 'archive',
+					$this->userSpecification( $dbw, $to, 'ar_user', 'ar_user_text', 'ar_actor' ),
+					[ $arQueryInfo['conds'] ], __METHOD__ );
+				$this->output( "done.\n" );
+				# Update recent changes if required
+				if ( $rc ) {
+					$this->output( "Updating recent changes..." );
+					$dbw->update( 'recentchanges',
+						$this->userSpecification( $dbw, $to, 'rc_user', 'rc_user_text', 'rc_actor' ),
+						[ $rcQueryInfo['conds'] ], __METHOD__ );
+					$this->output( "done.\n" );
+				}
+			}
+		}
+
+		$this->commitTransaction( $dbw, __METHOD__ );
+
+		return (int)$total;
+	}
+
+	/**
+	 * Return user specifications
+	 * i.e. user => id, user_text => text
+	 *
+	 * @param IDatabase $dbw Database handle
+	 * @param User $user User for the spec
+	 * @param string $idfield Field name containing the identifier
+	 * @param string $utfield Field name containing the user text
+	 * @param string $acfield Field name containing the actor ID
+	 * @return array
+	 */
+	private function userSpecification( IDatabase $dbw, &$user, $idfield, $utfield, $acfield ) {
+		global $wgActorTableSchemaMigrationStage;
+
+		$ret = [];
+		if ( $wgActorTableSchemaMigrationStage < MIGRATION_NEW ) {
+			$ret += [
+				$idfield => $user->getId(),
+				$utfield => $wgActorTableSchemaMigrationStage <= MIGRATION_WRITE_BOTH ? $user->getName() : '',
+			];
+		}
+		if ( $wgActorTableSchemaMigrationStage > MIGRATION_OLD ) {
+			$ret += [ $acfield => $user->getActorId( $dbw ) ];
+		}
+		return $ret;
+	}
+
+	/**
+	 * Initialise the user object
+	 *
+	 * @param string $username Username or IP address
+	 * @return User
+	 */
+	private function initialiseUser( $username ) {
+		if ( User::isIP( $username ) ) {
+			$user = new User();
+			$user->setId( 0 );
+			$user->setName( $username );
+		} else {
+			$user = User::newFromName( $username );
+			if ( !$user ) {
+				$this->fatalError( "Invalid username" );
+			}
+		}
+		$user->load();
+
+		return $user;
+	}
+}
+
+$maintClass = ReassignEdits::class;
+require_once RUN_MAINTENANCE_IF_MAIN;