veilidchat/lib/tools/stream_wrapper_cubit.dart
2024-02-09 21:17:28 -05:00

26 lines
784 B
Dart

import 'dart:async';
import 'package:bloc/bloc.dart';
import 'package:veilid_support/veilid_support.dart';
abstract class StreamWrapperCubit<State> extends Cubit<AsyncValue<State>> {
StreamWrapperCubit(Stream<State> stream, {State? defaultState})
: super(defaultState != null
? AsyncValue.data(defaultState)
: const AsyncValue.loading()) {
_subscription = stream.listen((event) => emit(AsyncValue.data(event)),
// ignore: avoid_types_on_closure_parameters
onError: (Object error, StackTrace stackTrace) {
emit(AsyncValue.error(error, stackTrace));
});
}
@override
Future<void> close() async {
await _subscription.cancel();
await super.close();
}
late final StreamSubscription<State> _subscription;
}