Install service worker at launch

web/services/notifications-service.ts

@@ -0,0 +1,48 @@
+export async function saveNotificationRegistration(channel, destination, accessToken) {
+  const URL_REGISTER_NOTIFICATION = `/api/notifications/register`;
+
+  const options = {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    body: JSON.stringify({ channel, destination }),
+  };
+
+  try {
+    await fetch(`${URL_REGISTER_NOTIFICATION}?accessToken=${accessToken}`, options);
+  } catch (e) {
+    console.error(e);
+  }
+}
+
+export function isPushNotificationSupported() {
+  return 'serviceWorker' in navigator && 'PushManager' in window;
+}
+
+function urlBase64ToUint8Array(base64String: string) {
+  const padding = '='.repeat((4 - (base64String.length % 4)) % 4);
+  const base64 = (base64String + padding).replace(/-/g, '+').replace(/_/g, '/');
+
+  const rawData = window.atob(base64);
+  const outputArray = new Uint8Array(rawData.length);
+
+  for (let i = 0; i < rawData.length; ++i) {
+    outputArray[i] = rawData.charCodeAt(i);
+  }
+  return outputArray;
+}
+
+export async function registerWebPushNotifications(vapidPublicKey) {
+  const registration = await navigator.serviceWorker.ready;
+  let subscription = await registration.pushManager.getSubscription();
+
+  if (!subscription) {
+    subscription = await registration.pushManager.subscribe({
+      userVisibleOnly: true,
+      applicationServerKey: urlBase64ToUint8Array(vapidPublicKey),
+    });
+  }
+
+  return JSON.stringify(subscription);
+}