DaffProductCompositePageEffects

Handles composite product specific actions for the product page.

@Injectable()
class DaffProductCompositePageEffects<<T extends DaffCompositeProduct = DaffCompositeProduct>>  {
  preselectCompositeOptions$: Observable<typeof EMPTY | DaffCompositeProductApplyOption<T>> = createEffect(() => this.actions$.pipe(
      ofType(DaffProductPageActionTypes.ProductPageLoadSuccessAction),
      switchMap((action: DaffProductPageLoadSuccess<T>) => {
        const queryParam = this.paramGetter.get();

        // get the product corresponding to the current product page
        const product: DaffCompositeProduct = action.payload.products.filter(({ id }) => id === action.payload.id)[0];

        // if we don't have a query param set or if the product isn't composite,
        // we have nothing to do
        if (!queryParam || product?.type !== DaffProductTypeEnum.Composite) {
          return EMPTY;
        }

        let selection: DaffProductCompositeSelectionPayload;

        try {
          selection = this.config.compositeSelectionQueryParamDecode(queryParam, product);
        } catch (error) {
          return EMPTY;
        }

        const applyActions = Object.keys(selection).reduce<DaffCompositeProductApplyOption<T>[]>(
          (actions, itemId) => actions.concat(buildApplyActions(product, itemId, selection[itemId])),
          [],
        );

        // dispatch each of the apply actions into the action stream
        return of(...applyActions);
      }),
    ))
}