ClearWatchlistNotificationsJob.php

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<?php
use MediaWiki\MediaWikiServices;
 
class ClearWatchlistNotificationsJob extends Job {
    function __construct( Title $title, array $params ) {
        parent::__construct( 'clearWatchlistNotifications', $title, $params );
 
        static $required = [ 'userId', 'casTime' ];
        $missing = implode( ', ', array_diff( $required, array_keys( $this->params ) ) );
        if ( $missing != '' ) {
            throw new InvalidArgumentException( "Missing parameter(s) $missing" );
        }
 
        $this->removeDuplicates = true;
    }
 
    public function run() {
        $services = MediaWikiServices::getInstance();
        $lbFactory = $services->getDBLoadBalancerFactory();
        $rowsPerQuery = $services->getMainConfig()->get( 'UpdateRowsPerQuery' );
 
        $dbw = $lbFactory->getMainLB()->getConnection( DB_MASTER );
        $ticket = $lbFactory->getEmptyTransactionTicket( __METHOD__ );
        $timestamp = $this->params['timestamp'] ?? null;
        if ( $timestamp === null ) {
            $timestampCond = 'wl_notificationtimestamp IS NOT NULL';
        } else {
            $timestamp = $dbw->timestamp( $timestamp );
            $timestampCond = 'wl_notificationtimestamp != ' . $dbw->addQuotes( $timestamp ) .
                ' OR wl_notificationtimestamp IS NULL';
        }
        // New notifications since the reset should not be cleared
        $casTimeCond = 'wl_notificationtimestamp < ' .
            $dbw->addQuotes( $dbw->timestamp( $this->params['casTime'] ) ) .
            ' OR wl_notificationtimestamp IS NULL';
 
        $firstBatch = true;
        do {
            $idsToUpdate = $dbw->selectFieldValues(
                'watchlist',
                'wl_id',
                [
                    'wl_user' => $this->params['userId'],
                    $timestampCond,
                    $casTimeCond,
                ],
                __METHOD__,
                [ 'LIMIT' => $rowsPerQuery ]
            );
            if ( $idsToUpdate ) {
                $dbw->update(
                    'watchlist',
                    [ 'wl_notificationtimestamp' => $timestamp ],
                    [
                        'wl_id' => $idsToUpdate,
                        // For paranoia, enforce the CAS time condition here too
                        $casTimeCond
                    ],
                    __METHOD__
                );
                if ( !$firstBatch ) {
                    $lbFactory->commitAndWaitForReplication( __METHOD__, $ticket );
                }
                $firstBatch = false;
            }
        } while ( $idsToUpdate );
        return true;
    }
}