// Scope is basically the directory of the workerURL inside the domain (starting and ending with /)

// If your scope is too short, Firefox will say "unsafe operation"

// and Chrome will give a proper error message

sS hRegisterServiceWorker(S workerURL, S scope) {

  ret hjs(replaceDollarVars(javaScript_hashLocalIdentifiers("serviceWorker_", [[

    const #check = () => {

      if (!('serviceWorker' in navigator)) {

        throw new Error('No Service Worker support!')

      }

      if (!('PushManager' in window)) {

        throw new Error('No Push API Support!')

      }

    };

    const #requestNotificationPermission = async () => {

      const permission = await window.Notification.requestPermission();

      // value of permission can be 'granted', 'default', 'denied'

      // granted: user has accepted the request

      // default: user has dismissed the notification permission popup by clicking on x

      // denied: user has denied the request.

      console.log("out of await requestPermission");

      console.log("permission: " + permission);

      if (permission !== 'granted') {

        throw new Error('Permission not granted for Notification')

      }

    };

    const #registerServiceWorker = async () => {

      console.log("registerServiceWorker " + $workerURL);

      const swRegistration = await navigator.serviceWorker.register($workerURL, {scope: $scope});

      console.log("out of await swRegistration");

      return swRegistration;

    };

    const #showLocalNotification = (title, body, swRegistration) => {

      swRegistration.showNotification(title, { body });

    }

    const #main = async () => {

      console.log("registerServiceWorker starting");

      check();

      const swRegistration = await registerServiceWorker();

      console.log("Service worker registered: " + swRegistration);

      const permission = await requestNotificationPermission();

      console.log("Out of await requestNotificationPermission");

      console.log("Notification permission: " + permission);

      //showLocalNotification('Demo notification', 'Hello user', swRegistration);

    };

    main();

  ]]), workerURL := jsQuote(workerURL), scope := jsQuote(scope));

}