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<?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 GPL-2.0-or-later
 */
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 ) {
        $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..." );
                $dbw->update(
                    'revision_actor_temp',
                    [ 'revactor_actor' => $to->getActorId( $dbw ) ],
                    [ 'revactor_actor' => $from->getActorId() ],
                    __METHOD__
                );
                $this->output( "done.\nReassigning deleted edits..." );
                $dbw->update( 'archive',
                    [ 'ar_actor' => $to->getActorId( $dbw ) ],
                    [ $arQueryInfo['conds'] ], __METHOD__ );
                $this->output( "done.\n" );
                # Update recent changes if required
                if ( $rc ) {
                    $this->output( "Updating recent changes..." );
                    $dbw->update( 'recentchanges',
                        [ 'rc_actor' => $to->getActorId( $dbw ) ],
                        // @phan-suppress-next-line PhanTypeArraySuspiciousNullable False positive
                        [ $rcQueryInfo['conds'] ], __METHOD__ );
                    $this->output( "done.\n" );
                }
            }
        }
        $this->commitTransaction( $dbw, __METHOD__ );
        return (int)$total;
    }
    /**
     * Initialise the user object
     *
     * @param string $username Username or IP address
     * @return User
     */
    private function initialiseUser( $username ) {
        if ( User::isIP( $username ) ) {
            $user = User::newFromName( $username, false );
            $user->getActorId();
        } else {
            $user = User::newFromName( $username );
            if ( !$user ) {
                $this->fatalError( "Invalid username" );
            }
        }
        $user->load();
        return $user;
    }
}
$maintClass = ReassignEdits::class;
require_once RUN_MAINTENANCE_IF_MAIN;