Initial draft

lib/widget/operations/bloc/operation_bloc.dart

@@ -0,0 +1,31 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:hl_lieferservice/widget/operations/bloc/operation_event.dart';
+import 'package:hl_lieferservice/widget/operations/bloc/operation_state.dart';
+
+class OperationBloc extends Bloc<OperationEvent, OperationState> {
+  OperationBloc() : super(OperationIdle()) {
+    on<LoadOperation>(_loadOperation);
+    on<FailOperation>(_failOperation);
+    on<FinishOperation>(_finishOperation);
+  }
+
+  Future<void> _loadOperation(LoadOperation event, Emitter<OperationState> emit) async {
+    emit(OperationLoading());
+  }
+
+  Future<void> _failOperation(FailOperation event, Emitter<OperationState> emit) async {
+    emit(OperationFailed(message: event.message));
+
+    await Future.delayed(Duration(seconds: 5));
+
+    emit(OperationIdle());
+  }
+
+  Future<void> _finishOperation(FinishOperation event, Emitter<OperationState> emit) async {
+    emit(OperationFinished(message: event.message));
+
+    await Future.delayed(Duration(seconds: 5));
+
+    emit(OperationIdle());
+  }
+}

lib/widget/operations/bloc/operation_event.dart

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+abstract class OperationEvent {}
+
+class LoadOperation extends OperationEvent {}
+
+class FailOperation extends OperationEvent {
+  String message;
+
+  FailOperation({required this.message});
+}
+
+class FinishOperation extends OperationEvent {
+  String? message;
+
+  FinishOperation({this.message});
+}

lib/widget/operations/bloc/operation_state.dart

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+abstract class OperationState {}
+
+class OperationIdle extends OperationState {}
+
+class OperationLoading extends OperationState {}
+
+class OperationFailed extends OperationState {
+  String message;
+
+  OperationFailed({required this.message});
+}
+
+class OperationFinished extends OperationState {
+  String? message;
+
+  OperationFinished({this.message});
+}