ActivityUpdateJob.php

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<?php
class ActivityUpdateJob extends Job {
    function __construct( Title $title, array $params ) {
        parent::__construct( 'activityUpdateJob', $title, $params );
 
        static $required = [ 'type', 'userid', 'notifTime', 'curTime' ];
        $missing = implode( ', ', array_diff( $required, array_keys( $this->params ) ) );
        if ( $missing != '' ) {
            throw new InvalidArgumentException( "Missing paramter(s) $missing" );
        }
 
        $this->removeDuplicates = true;
    }
 
    public function run() {
        if ( $this->params['type'] === 'updateWatchlistNotification' ) {
            $this->updateWatchlistNotification();
        } else {
            throw new InvalidArgumentException( "Invalid 'type' '{$this->params['type']}'." );
        }
 
        return true;
    }
 
    protected function updateWatchlistNotification() {
        $casTimestamp = ( $this->params['notifTime'] !== null )
            ? $this->params['notifTime']
            : $this->params['curTime'];
 
        $dbw = wfGetDB( DB_MASTER );
        $dbw->update( 'watchlist',
            [
                'wl_notificationtimestamp' => $dbw->timestampOrNull( $this->params['notifTime'] )
            ],
            [
                'wl_user' => $this->params['userid'],
                'wl_namespace' => $this->title->getNamespace(),
                'wl_title' => $this->title->getDBkey(),
                // Add a "check and set" style comparison to handle conflicts.
                // The inequality always avoids updates when the current value
                // is already NULL per ANSI SQL. This is desired since NULL means
                // that the user is "caught up" on edits already. When the field
                // is non-NULL, make sure not to set it back in time or set it to
                // NULL when newer revisions were in fact added to the page.
                'wl_notificationtimestamp < ' . $dbw->addQuotes( $dbw->timestamp( $casTimestamp ) )
            ],
            __METHOD__
        );
    }
}