self.addEventListener('push', (event) => {
    const notif = event.data.json().notification;

    event.wailtUtil(self.registration.showNotification(notif.title, {
        body: notif.body,
        icon: "./icon-512x512.png",
        data: {
            url: notif.click_action
        }
    }));
    self.addEventListener("notificationclick", (event) => {
        event.wailtUtil(clients.openWindow(event.notification.data.url));
    });
});