App and push notifications?

Aberwyn/wwwroot/js/site.js

@@ -1,4 +1,42 @@
 // Please see documentation at https://docs.microsoft.com/aspnet/core/client-side/bundling-and-minification
 // for details on configuring this project to bundle and minify static web assets.
 
-// Write your JavaScript code.
+if ('serviceWorker' in navigator) {
+    window.addEventListener('load', function () {
+        navigator.serviceWorker.register('/service-worker.js')
+            .then(function (registration) {
+                console.log('✅ Service Worker registrerad med scope:', registration.scope);
+                subscribeToPush().catch(console.error);
+            })
+            .catch(function (error) {
+                console.log('❌ Service Worker-registrering misslyckades:', error);
+            });
+    });
+}
+
+async function subscribeToPush() {
+    const registration = await navigator.serviceWorker.ready;
+    const publicVapidKey = await fetch('/api/push/vapid-public-key').then(r => r.text());
+
+    const subscription = await registration.pushManager.subscribe({
+        userVisibleOnly: true,
+        applicationServerKey: urlBase64ToUint8Array(publicVapidKey)
+    });
+
+    await fetch('/api/push/subscribe', {
+        method: 'POST',
+        body: JSON.stringify(subscription),
+        headers: { 'Content-Type': 'application/json' }
+    });
+
+    console.log('✅ Push-prenumeration skickad');
+}
+
+
+// utility för att konvertera nyckeln
+function urlBase64ToUint8Array(base64String) {
+    const padding = '='.repeat((4 - base64String.length % 4) % 4);
+    const base64 = (base64String + padding).replace(/-/g, '+').replace(/_/g, '/');
+    const raw = atob(base64);
+    return new Uint8Array([...raw].map(char => char.charCodeAt(0)));
+}