ActivityUpdateJob.php

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<?php
use MediaWiki\Linker\LinkTarget;
use MediaWiki\Page\PageReference;
 
class ActivityUpdateJob extends Job {
    public function __construct( $title, array $params ) {
        // If we know its a PageReference, we could just pass that to the parent
        // constructor, but its simpler to just extract namespace and dbkey, and
        // that works for both LinkTarget and PageReference
        $params['namespace'] = $title->getNamespace();
        $params['title'] = $title->getDBkey();
 
        parent::__construct( 'activityUpdateJob', $params );
 
        static $required = [ 'type', 'userid', 'notifTime', 'curTime' ];
        $missing = implode( ', ', array_diff( $required, array_keys( $this->params ) ) );
        if ( $missing != '' ) {
            throw new InvalidArgumentException( "Missing parameter(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'] ?? $this->params['curTime'];
 
        $dbw = wfGetDB( DB_PRIMARY );
        // 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.
        $casTimeCond = 'wl_notificationtimestamp < ' . $dbw->addQuotes( $dbw->timestamp( $casTimestamp ) );
 
        // select primary key first instead of directly update to avoid deadlocks per T204561
        $wlId = $dbw->selectField(
            'watchlist',
            'wl_id',
            [
                'wl_user' => $this->params['userid'],
                'wl_namespace' => $this->title->getNamespace(),
                'wl_title' => $this->title->getDBkey(),
                $casTimeCond
            ],
            __METHOD__
        );
 
        if ( !$wlId ) {
            return;
        }
 
        $dbw->update(
            'watchlist',
            [ 'wl_notificationtimestamp' => $dbw->timestampOrNull( $this->params['notifTime'] ) ],
            [
                'wl_id' => (int)$wlId,
                // For paranoia, enforce the CAS time condition here too
                $casTimeCond
            ],
            __METHOD__
        );
    }
}