Example of NgRx facade

configurations.facade.ts

@Injectable()
export class ConfigurationsFacade {
  /**
   * Combine pieces of state using createSelector,
   * and expose them as observables through the facade.
   */
  loaded$ = this.store.pipe(select(ConfigurationsSelectors.getConfigurationsLoaded));
  failed$ = this.store.pipe(select(ConfigurationsSelectors.getConfigurationsLoadFailed));
  allConfigurations$: Observable<Configuration[]> = this.store.pipe(select(ConfigurationsSelectors.getAllConfigurations));
  selectedConfigurations$ = this.store.pipe(select(ConfigurationsSelectors.getSelected));

  constructor(private store: Store) {}

  /**
   * Use the initialization action to perform one
   * or more tasks in your Effects.
   */
  loadConfigurations() {
    this.store.dispatch(ConfigurationsActions.loadConfigurations());
  }
}