Initial commit

lib/features/main/presentation/bloc/main_bloc.dart

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+import 'package:equatable/equatable.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+
+part 'main_event.dart';
+
+part 'main_state.dart';
+
+class MainBloc extends Bloc<MainEvent, MainState> {
+  MainBloc() : super(const MainState(tab: MainTab.home)) {
+    on<ChangeTabEvent>(_changeTab);
+  }
+
+  void _changeTab(ChangeTabEvent event, Emitter<MainState> emit) {
+    // if (state.tab != event.tab) {
+    //   changeTap(event.tab);
+    // }
+    emit(state.copyWith(tab: event.tab));
+  }
+
+  // void changeTap(MainTab tab) {
+  //   switch (tab) {
+  //     case MainTab.home:
+  //       Navigator.of(
+  //         shellRootNavigatorKey.currentContext!,
+  //       ).pushNamedAndRemoveUntil(Routes.home, (route) => false);
+  //       break;
+  //     case MainTab.calculation:
+  //       Navigator.of(
+  //         shellRootNavigatorKey.currentContext!,
+  //       ).pushNamedAndRemoveUntil(Routes.calculation, (route) => false);
+  //       break;
+  //     case MainTab.profile:
+  //       Navigator.of(
+  //         shellRootNavigatorKey.currentContext!,
+  //       ).pushNamedAndRemoveUntil(Routes.profile, (route) => false);
+  //       break;
+  //   }
+  // }
+}
+
+enum MainTab { home, calculation, profile }

lib/features/main/presentation/bloc/main_event.dart

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+part of 'main_bloc.dart';
+
+sealed class MainEvent extends Equatable {
+  const MainEvent();
+}
+
+final class ChangeTabEvent extends MainEvent {
+  final MainTab tab;
+
+  const ChangeTabEvent({required this.tab});
+
+  @override
+  List<Object?> get props => [tab];
+}

lib/features/main/presentation/bloc/main_state.dart

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+part of 'main_bloc.dart';
+
+class MainState extends Equatable {
+  final MainTab tab;
+
+  const MainState({
+    required this.tab,
+  });
+
+  MainState copyWith({
+    MainTab? tab,
+  }) {
+    return MainState(tab: tab ?? this.tab);
+  }
+
+  @override
+  List<Object?> get props => [tab];
+}