wip start sketch getting token, sending to server; TODO listen for ch…

…anges, retry/save, iOS

lib/main.dart

@@ -4,6 +4,7 @@ import 'package:flutter/material.dart';
 import 'licenses.dart';
 import 'log.dart';
 import 'model/binding.dart';
+import 'notif.dart';
 import 'widgets/app.dart';
 
 void main() {
@@ -13,5 +14,7 @@ void main() {
   }());
   LicenseRegistry.addLicense(additionalLicenses);
   LiveZulipBinding.ensureInitialized();
+  WidgetsFlutterBinding.ensureInitialized();
+  NotificationService.instance.start();
   runApp(const ZulipApp());
 }

lib/model/store.dart

@@ -12,7 +12,9 @@ import '../api/model/initial_snapshot.dart';
 import '../api/model/model.dart';
 import '../api/route/events.dart';
 import '../api/route/messages.dart';
+import '../api/route/notifications.dart';
 import '../log.dart';
+import '../notif.dart';
 import 'autocomplete.dart';
 import 'database.dart';
 import 'message_list.dart';
@@ -451,6 +453,7 @@ class LivePerAccountStore extends PerAccountStore {
       initialSnapshot: initialSnapshot,
     );
     store.poll();
+    store.registerNotificationToken();
     return store;
   }
 
@@ -472,4 +475,15 @@ class LivePerAccountStore extends PerAccountStore {
       }
     }
   }
+
+  void registerNotificationToken() { // TODO retry; TODO save acked to dedupe
+    _registerNotificationToken();
+    NotificationService.instance.token.addListener(_registerNotificationToken);
+  }
+
+  Future<void> _registerNotificationToken() async {
+    final token = NotificationService.instance.token.value;
+    if (token == null) return;
+    await registerFcmToken(connection, token: token);  // TODO iOS/APNs
+  }
 }

lib/notif.dart

@@ -0,0 +1,24 @@
+import 'package:firebase_messaging/firebase_messaging.dart';
+import 'package:flutter/foundation.dart';
+
+import 'model/binding.dart';
+
+class NotificationService {
+  static NotificationService get instance => (_instance ??= NotificationService._());
+  static NotificationService? _instance;
+
+  NotificationService._();
+
+  void start() async {
+    await ZulipBinding.instance.firebaseInitializeApp();
+    _getToken();
+  }
+
+  ValueNotifier<String?> token = ValueNotifier(null);
+
+  Future<void> _getToken() async {
+    final result = await ZulipBinding.instance.firebaseMessaging.getToken(); // TODO(log) if null
+    print("notif token: $result");
+    token.value = result;
+  }
+}