build method

Recalculates the state of the repository.

This method is called when:

• The repository is first initialized.
• A repository watched via watch emits a new state.
• This repository is updated (if updateInterval is not Duration.zero).

Override this method to handle changes from said repositories.

Example:

class MyRepository extends Repository<MyState> {
  final OtherRepository _otherRepository;

  MyRepository(this._otherRepository) : super(MyState.new) {
    watch(_otherRepository);
  }

  @override
  FutureOr<void> build(BuildTrigger trigger) async {
    if(trigger is InitialBuildTrigger) {
      // Do something when the repository is first initialized
    }

    if(trigger is UpdateTrigger) {
      // Do something when the repository is updated
    }

    if(trigger is OtherRepository) {
      // Do something when the other repository emits a new state
    }
  }
}