settings screen ui

lib/shared/components/bloc/toggle/toggle_bloc.dart

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+// Bloc
+import 'package:bloc/bloc.dart';
+
+import 'toggle_event.dart';
+import 'toggle_state.dart';
+
+class ToggleBloc extends Bloc<ToggleEvent, ToggleState> {
+  ToggleBloc() : super(ToggleInitial());
+
+  Stream<ToggleState> mapEventToState(ToggleEvent event) async* {
+    if (event is ToggleSwitch) {
+      if (state is ToggleOn) {
+        yield ToggleOff();
+      } else {
+        yield ToggleOn();
+      }
+    }
+  }
+}

lib/shared/components/bloc/toggle/toggle_event.dart

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+// Events
+import 'package:equatable/equatable.dart';
+
+abstract class ToggleEvent extends Equatable {
+  const ToggleEvent();
+
+  @override
+  List<Object> get props => [];
+}

lib/shared/components/bloc/toggle/toggle_state.dart

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+import 'package:equatable/equatable.dart';
+
+import 'toggle_event.dart';
+
+class ToggleSwitch extends ToggleEvent {}
+
+// States
+abstract class ToggleState extends Equatable {
+  const ToggleState();
+
+  @override
+  List<Object> get props => [];
+}
+
+class ToggleInitial extends ToggleState {}
+
+class ToggleOn extends ToggleState {}
+
+class ToggleOff extends ToggleState {}