Improved json auto save & budget mobile UI

lib/repositories/metadata/metadata_repository.dart

@@ -4,6 +4,7 @@ import 'package:tunas/repositories/metadata/models/budget.dart';
 import 'package:tunas/repositories/metadata/models/category.dart';
 import 'package:tunas/repositories/metadata/models/account.dart';
 import 'package:tunas/repositories/metadata/models/metadata.dart';
+import 'package:tunas/repositories/metadata/models/settings.dart';
 
 class MetadataRepository {
 
@@ -11,6 +12,7 @@ class MetadataRepository {
   final _categoriesController = BehaviorSubject<List<Category>>.seeded(const []);
   final _budgetController = BehaviorSubject<List<Budget>>.seeded(const []);
   final _accountController = BehaviorSubject<List<Account>>.seeded(const []);
+  final _settingsController = BehaviorSubject<Settings>.seeded(const Settings());
 
   MetadataRepository({
     required jsonRepository,
@@ -40,6 +42,14 @@ class MetadataRepository {
     return _accountController.asBroadcastStream();
   }
 
+  Settings getSettings() {
+    return _settingsController.value;
+  }
+
+  Stream<Settings> getSettingsStream() {
+    return _settingsController.asBroadcastStream();
+  }
+
   void loadMetadata() async {
     Metadata metadata = await _jsonRepository.loadJson(Metadata(), MetadataFactory());
     _broadcastMetadata(metadata);
@@ -69,6 +79,14 @@ class MetadataRepository {
     return accounts;
   }
 
+  Settings saveSettings(Settings settings) {
+    Metadata metadata = _constructMetadataFromControllers();
+    metadata.settings = settings;
+    _jsonRepository.saveJson(metadata);
+    _settingsController.add(settings);
+    return settings;
+  }
+
   void deleteMetadata() {
     Metadata metadata = Metadata();
     _jsonRepository.saveJson(metadata);
@@ -79,6 +97,7 @@ class MetadataRepository {
     _categoriesController.add(metadata.categories);
     _budgetController.add(metadata.budgets);
     _accountController.add(metadata.accounts);
+    _settingsController.add(metadata.settings);
   }
 
   Metadata _constructMetadataFromControllers() {
@@ -86,6 +105,7 @@ class MetadataRepository {
       categories: _categoriesController.value,
       budgets: _budgetController.value,
       accounts: _accountController.value,
+      settings: _settingsController.value,
     );
   }
 }