step

lib/shared/providers/backup_provider.dart

@@ -0,0 +1,8 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import '../services/backup_service.dart';
+import 'premium_provider.dart';
+
+final backupServiceProvider = Provider<BackupService>((ref) {
+  final token = ref.watch(purchaseTokenProvider) ?? '';
+  return BackupService(token);
+});

lib/shared/providers/billing_provider.dart

@@ -1,8 +1,6 @@
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import '../../features/dashboard/provider.dart';
 import '../services/billing_service.dart';
 
 final billingServiceProvider = Provider<BillingService>((ref) {
-  final prefs = ref.watch(sharedPreferencesProvider);
-  return MockBillingService(prefs);
+  return PlayBillingService();
 });

lib/shared/providers/current_user_provider.dart

@@ -1,29 +1,27 @@
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../features/dashboard/provider.dart';
 import '../models/user_model.dart';
+import '../services/premium_manager.dart';
+import 'billing_provider.dart';
 
 class CurrentUserNotifier extends Notifier<UserModel> {
-  static const _key = 'user_plan';
-
   @override
   UserModel build() {
     final prefs = ref.watch(sharedPreferencesProvider);
-    final planName = prefs.getString(_key);
-    final plan = UserPlan.values.firstWhere(
-      (e) => e.name == planName,
-      orElse: () => UserPlan.free,
-    );
-    return UserModel(plan: plan);
+    final billing = ref.watch(billingServiceProvider);
+    final manager = PremiumManager(prefs, billing);
+    return UserModel(plan: manager.currentPlan);
   }
 
   Future<void> setPlan(UserPlan plan) async {
-    final prefs = ref.read(sharedPreferencesProvider);
     state = UserModel(plan: plan);
-    await prefs.setString(_key, plan.name);
   }
 
-  Future<void> toggleVip() async {
-    await setPlan(state.isVip ? UserPlan.free : UserPlan.vip);
+  Future<void> refreshFromPremium() async {
+    final prefs = ref.read(sharedPreferencesProvider);
+    final billing = ref.read(billingServiceProvider);
+    final manager = PremiumManager(prefs, billing);
+    state = UserModel(plan: manager.currentPlan);
   }
 }
 

lib/shared/providers/google_drive_provider.dart

@@ -0,0 +1,18 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:google_sign_in/google_sign_in.dart';
+import '../services/google_drive_service.dart';
+
+final googleDriveServiceProvider = Provider<GoogleDriveService>((ref) {
+  final signIn = GoogleSignIn(
+    scopes: [
+      'email',
+      'https://www.googleapis.com/auth/drive.appdata',
+    ],
+  );
+  return GoogleDriveService(signIn);
+});
+
+final googleDriveUserProvider = StreamProvider<GoogleSignInAccount?>((ref) {
+  final service = ref.watch(googleDriveServiceProvider);
+  return service.onUserChanged;
+});

lib/shared/providers/premium_provider.dart

@@ -0,0 +1,20 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import '../../features/dashboard/provider.dart';
+import '../services/premium_manager.dart';
+import 'billing_provider.dart';
+
+final premiumManagerProvider = Provider<PremiumManager>((ref) {
+  final prefs = ref.watch(sharedPreferencesProvider);
+  final billing = ref.watch(billingServiceProvider);
+  return PremiumManager(prefs, billing);
+});
+
+final isPremiumProvider = Provider<bool>((ref) {
+  final manager = ref.watch(premiumManagerProvider);
+  return manager.isPremium;
+});
+
+final purchaseTokenProvider = Provider<String?>((ref) {
+  final manager = ref.watch(premiumManagerProvider);
+  return manager.purchaseToken;
+});