data-service.ts

// https://github.com/greetclock/parts/blob/d97018/libs/todos-data/src/lib/todos-data.service.ts

@Injectable({
  providedIn: 'root',
})
export class TodosDataService {
  constructor(
    private todosAdapter: TodosAdapterService,
    private todosRepo: TodosRepository,
  ) {}

  getTodos(): Observable<Todo[]> {
    return this.todosAdapter
      .getTodos()
      .pipe(tap((todos) => this.todosRepo.setTodos(todos)))
  }
}