use SharedPreferencesAsync to avoid race condition in Sharedprefs

This was so painful to debug...

.vscode/launch.json

@@ -0,0 +1,17 @@
+{
+    "configurations": [
+        {
+            "name": "Flutter",
+            "type": "dart",
+            "request": "launch",
+            "program": "lib/main.dart"
+        },
+        {
+            "name": "Flutter (Headless)",
+            "type": "dart",
+            "request": "launch",
+            "program": "lib/main.dart",
+            "env": { "FLUTTER_HEADLESS": "1" }
+        }
+    ]
+}

lib/controllers/key.dart

@@ -1,28 +1,28 @@
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/controllers/shared_prefs.dart";
 
-class KeyController(final String key) extends Notifier<String?> {
+class KeyController(final String key) extends AsyncNotifier<String?> {
   static const String spaceKey = "space";
   static const String roomKey = "room";
   static const String pushKeyKey = "pushKey";
 
   @override
-  String? build() =>
-      ref.watch(SharedPrefsController.provider).requireValue.getString(key);
+  Future<String?> build() =>
+      ref.watch(SharedPrefsController.provider).getString(key);
 
   Future<void> set(String? value) async {
-    final prefs = ref.watch(SharedPrefsController.provider).requireValue;
-    state = value;
+    final prefs = ref.watch(SharedPrefsController.provider);
+    state = .data(value);
 
     if (value == null) {
-      prefs.remove(key);
+      await prefs.remove(key);
     } else {
-      prefs.setString(key, value);
+      await prefs.setString(key, value);
     }
   }
 
   static final provider =
-      NotifierProvider.family<KeyController, String?, String>(
+      AsyncNotifierProvider.family<KeyController, String?, String>(
         KeyController.new,
       );
 }

lib/controllers/member_list_opened.dart

@@ -1,22 +1,20 @@
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/controllers/shared_prefs.dart";
 
-class MemberListOpenedController extends Notifier<bool> {
+class MemberListOpenedController extends AsyncNotifier<bool> {
   static const String key = "memberListOpened";
 
   @override
-  bool build() =>
-      ref.watch(SharedPrefsController.provider).requireValue.getBool(key) ??
-      true;
+  Future<bool> build() async =>
+      await ref.watch(SharedPrefsController.provider).getBool(key) ?? true;
 
   Future<void> set(bool value) async {
-    final prefs = ref.watch(SharedPrefsController.provider).requireValue;
-    state = value;
-
-    prefs.setBool(key, value);
+    state = .data(value);
+    await ref.watch(SharedPrefsController.provider).setBool(key, value);
   }
 
-  static final provider = NotifierProvider<MemberListOpenedController, bool>(
-    MemberListOpenedController.new,
-  );
+  static final provider =
+      AsyncNotifierProvider<MemberListOpenedController, bool>(
+        MemberListOpenedController.new,
+      );
 }

lib/controllers/push_key.dart

@@ -4,18 +4,19 @@ import "package:fast_immutable_collections/fast_immutable_collections.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/controllers/key.dart";
 
-class PushKeyController(final String instance) extends Notifier<String?> {
+class PushKeyController(final String instance) extends AsyncNotifier<String?> {
   @override
-  String? build() => json.decode(
-    ref.watch(KeyController.provider(KeyController.pushKeyKey)) ?? "{}",
+  Future<String?> build() async => json.decode(
+    await ref.watch(KeyController.provider(KeyController.pushKeyKey).future) ??
+        "{}",
   )[instance];
 
   Future<void> set(String? value) async {
     final provider = KeyController.provider(KeyController.pushKeyKey);
     final notifier = ref.watch(provider.notifier);
-    final prefs = IMap(json.decode(ref.watch(provider) ?? "{}"));
+    final prefs = IMap(json.decode(await ref.watch(provider.future) ?? "{}"));
 
-    state = value;
+    state = .data(value);
     notifier.set(
       json.encode(
         prefs.add(instance, value).where((_, value) => value != null).unlock,
@@ -24,7 +25,7 @@ class PushKeyController(final String instance) extends Notifier<String?> {
   }
 
   static final provider =
-      NotifierProvider.family<PushKeyController, String?, String>(
+      AsyncNotifierProvider.family<PushKeyController, String?, String>(
         PushKeyController.new,
       );
 }

lib/controllers/shared_prefs.dart

@@ -1,12 +1,12 @@
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:shared_preferences/shared_preferences.dart";
 
-class SharedPrefsController extends AsyncNotifier<SharedPreferences> {
+class SharedPrefsController extends Notifier<SharedPreferencesAsync> {
   @override
-  Future<SharedPreferences> build() async => .getInstance();
+  SharedPreferencesAsync build() => SharedPreferencesAsync();
 
   static final provider =
-      AsyncNotifierProvider<SharedPrefsController, SharedPreferences>(
+      NotifierProvider<SharedPrefsController, SharedPreferencesAsync>(
         SharedPrefsController.new,
       );
 }

lib/controllers/unified_push.dart

@@ -13,7 +13,6 @@ import "package:nexus/controllers/client.dart";
 import "package:nexus/controllers/client_state.dart";
 import "package:nexus/models/content/message.dart";
 import "package:nexus/models/content/sticker.dart";
-import "package:nexus/models/requests/register_pusher.dart";
 import "package:unifiedpush/unifiedpush.dart";
 import "package:unifiedpush_storage_shared_preferences/storage.dart";
 import "package:window_manager/window_manager.dart";
@@ -40,8 +39,8 @@ class UnifiedPushController extends AsyncNotifier<bool> {
           .new(
             appDisplayName: "Nexus",
             appId: "nexus.federated.nexus",
-            data: PusherData.webPush(
-              url: Uri.parse(endpoint.url),
+            data: .webPush(
+              url: .parse(endpoint.url),
               auth: endpoint.pubKeySet!.auth,
             ),
             deviceDisplayName:
@@ -67,7 +66,9 @@ class UnifiedPushController extends AsyncNotifier<bool> {
             event.unreadType?.shouldNotify() != true ||
             (!isInBackground &&
                 await windowManager.isFocused().onError((_, _) => false) &&
-                ref.watch(KeyController.provider(KeyController.roomKey)) ==
+                await ref.watch(
+                      KeyController.provider(KeyController.roomKey).future,
+                    ) ==
                     event.roomId)) {
           if (isInBackground) exit(0);
           return;
@@ -146,7 +147,9 @@ class UnifiedPushController extends AsyncNotifier<bool> {
 
   Future<void> deregister() async {
     final clientState = ref.watch(ClientStateController.provider);
-    final key = ref.watch(PushKeyController.provider(clientState!.deviceId!));
+    final key = await ref.watch(
+      PushKeyController.provider(clientState!.deviceId!).future,
+    );
 
     if (key != null) {
       await ref

lib/main.dart

@@ -7,10 +7,11 @@ import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:media_kit/media_kit.dart";
 import "package:nexus/controllers/client.dart";
 import "package:nexus/controllers/client_state.dart";
+import "package:nexus/controllers/key.dart";
+import "package:nexus/controllers/member_list_opened.dart";
 import "package:nexus/controllers/multi_provider.dart";
 import "package:nexus/controllers/notification.dart";
 import "package:nexus/controllers/settings.dart";
-import "package:nexus/controllers/shared_prefs.dart";
 import "package:nexus/controllers/unified_push.dart";
 import "package:nexus/helpers/extensions/better_when.dart";
 import "package:nexus/helpers/extensions/scheme_to_theme.dart";
@@ -81,9 +82,9 @@ void main(List<String> args) async {
     await windowManager.setMinimumSize(Size.square(500));
   }
 
-  isInBackground = args.contains("--unifiedpush-bg");
+  isInBackground = Platform.environment["FLUTTER_HEADLESS"] != null;
 
-  LicenseRegistry.addLicense(() => Stream.fromIterable(fontLicenses));
+  LicenseRegistry.addLicense(() => .fromIterable(fontLicenses));
 
   FlutterError.onError = (FlutterErrorDetails details) =>
       showError(details.exception.toString(), details.stack);
@@ -103,14 +104,13 @@ void main(List<String> args) async {
           // ignore: dead_code
           if (false && kDebugMode) Logger(),
         ],
-        child: App(isInBackground),
+        child: App(),
       ),
     );
   }
 }
 
-class const App(final bool isInBackground, {super.key})
-    extends StatelessWidget {
+class const App({super.key}) extends StatelessWidget {
   @override
   Widget build(BuildContext context) => DynamicColorBuilder(
     builder: (lightDynamic, darkDynamic) => Consumer(
@@ -151,10 +151,12 @@ class const App(final bool isInBackground, {super.key})
               .watch(
                 MultiProviderController.provider(
                   IListConst([
-                    SharedPrefsController.provider,
                     ClientController.provider,
                     NotificationController.provider,
                     UnifiedPushController.provider,
+                    MemberListOpenedController.provider,
+                    KeyController.provider(KeyController.roomKey),
+                    KeyController.provider(KeyController.spaceKey),
                   ]),
                 ),
               )

lib/pages/chat.dart

@@ -14,7 +14,9 @@ class const ChatPage({super.key}) extends ConsumerWidget {
       final isDesktop = constraints.maxWidth > 650;
       final showMembersByDefault = constraints.maxWidth > 1000;
       final initComplete = ref.watch(InitCompleteController.provider);
-      final roomId = ref.watch(KeyController.provider(KeyController.roomKey));
+      final roomId = ref
+          .watch(KeyController.provider(KeyController.roomKey))
+          .requireValue;
 
       return SafeArea(
         child: Scaffold(

lib/widgets/room_chat.dart

@@ -43,7 +43,9 @@ final class const RoomChat({
     final composerSize = useState<double>(64);
 
     final userId = ref.watch(ClientStateController.provider)?.userId;
-    final memberListOpened = ref.watch(MemberListOpenedController.provider);
+    final memberListOpened = ref
+        .watch(MemberListOpenedController.provider)
+        .requireValue;
     final theme = Theme.of(context);
 
     final nothing = Center(

lib/widgets/sidebar.dart

@@ -23,13 +23,13 @@ class const Sidebar({required final bool isDesktop, super.key})
     final selectedSpaceProvider = KeyController.provider(
       KeyController.spaceKey,
     );
-    final selectedSpaceId = ref.watch(selectedSpaceProvider);
+    final selectedSpaceId = ref.watch(selectedSpaceProvider).requireValue;
     final selectedSpaceIdNotifier = ref.watch(selectedSpaceProvider.notifier);
 
     final selectedRoomController = KeyController.provider(
       KeyController.roomKey,
     );
-    final selectedRoomId = ref.watch(selectedRoomController);
+    final selectedRoomId = ref.watch(selectedRoomController).requireValue;
     final selectedRoomIdNotifier = ref.watch(selectedRoomController.notifier);
 
     final spaces = ref.watch(SpacesController.provider);