PizzaOrder Selector example

PizzaOrder.selectors.ts

import { createSelector, createFeatureSelector } from '@ngrx/store';

const selectUser = createFeatureSelector('user');
const selectDriver = createFeatureSelector('driver');
const selectPizzaOrder = createFeatureSelector('pizzaorder');
const selectPizza = createFeatureSelector('pizza');
const selectDelivery = createFeatureSelector('delivery');

const selectUserName = createSelector(
  selectUser,
  (state) => state.name
);

const selectPizzaToppings = createSelector(
  selectPizza,
  (state) => state.topping
);

const selectPizzaCrustType = createSelector(
  selectPizza,
  (state) => state.crustType
);

const selectDeliveryEstimate = createSelector(
  selectDelivery,
  (state) => state.estimate
);

const selectDriverName = createSelector(
  selectDriver,
  (state) => state.name
);

const selectDriverCarType = createSelector(
  selectDriver,
  (state) => state.carType
);

// export selectors used only by theme container
export const PizzaOrderSelectors = {
  selectUserName: selectUserName,
  selectPizzaToppings: selectPizzaToppings,
  selectPizzaCrustType: selectPizzaCrustType,
  selectDeliveryEstimate: selectDeliveryEstimate,
  selectDriverName: selectDriverName,
  selectDriverCarType: selectDriverCarType
}