Implemented settings, new scan, enhanced UI/UX

lib/feature/settings/bloc/settings_bloc.dart

@@ -0,0 +1,40 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:hl_lieferservice/feature/settings/bloc/settings_event.dart';
+import 'package:hl_lieferservice/feature/settings/bloc/settings_state.dart';
+import 'package:hl_lieferservice/feature/settings/model/settings.dart';
+import 'package:hl_lieferservice/feature/settings/repository/settings_repository.dart';
+
+class SettingsBloc extends Bloc<SettingsEvent, SettingsState> {
+  SettingsRepository repository;
+
+  SettingsBloc()
+    : repository = SettingsRepository(),
+      super(AppSettingsInitial()) {
+    on<LoadSettings>(_load);
+    on<UpdateSettings>(_update);
+  }
+
+  void _load(LoadSettings event, Emitter<SettingsState> emit) async {
+    try {
+      Settings settings = await repository.getSettings();
+      debugPrint("use ${settings.useHardwareScanner}");
+      emit(AppSettingsLoaded(settings: settings));
+    } catch (e, st) {
+      debugPrint("Failed to load settings: $e}");
+      debugPrint("Stacktrace: ${st.toString()}");
+      emit(AppSettingsFailed());
+    }
+  }
+
+  void _update(UpdateSettings event, Emitter<SettingsState> emit) {
+    try {
+      repository.saveSettings(event.settings);
+      emit(AppSettingsLoaded(settings: event.settings.copyWith()));
+    } catch (e, st) {
+      debugPrint("Failed to save settings: $e}");
+      debugPrint("Stacktrace: ${st.toString()}");
+      emit(AppSettingsFailed());
+    }
+  }
+}