A BehaviorSubject for Flutter with automatic persist and hydrate

by Flutter Awesome

Hydrated

Hydrated provides a BehaviorSubject that automatically persists to Flutter's local storage and hydrates on creation!

Easy to consume

All values are persisted with shared_preferences and restored with automatic hydration.

final count$ = HydratedSubject<int>("count", seedValue: 0);

/// count$ will automagically be hydrated with 42 next time it is created
count$.add(42);

Ready for BLoC

class HydratedBloc {
  final _count$ = HydratedSubject<int>("count", seedValue: 0);

  ValueObservable<int> get count$ => _count$.stream;
  Sink<int> get setCount => _count$.sink;

  dispose() {
    _count$.close();
  }
}

Supports simple types and serialized classes

We support all shared_preferences types.

  • int
  • double
  • bool
  • String
  • List<String>
final count$ = HydratedSubject<int>("count");

We also support serialized classes with hydrate and persist arguments.

final user$ = HydratedSubject<User>(
  "user",
  hydrate: (String s) => User.fromJSON(s),
  persist: (User user) => user.toJSON(),
);

Reliable

Hydrated is mock tested with all supported types and is dogfooded by its creator.

Demo

GitHub

https://github.com/lukepighetti/hydrated