feat(cart): compute cart prices for in-memory driver (#2614)

libs/cart-store-credit/driver/in-memory/src/backend/store-credit.service.spec.ts

@@ -7,6 +7,7 @@ import {
 
 import { DaffCartWithStoreCredit } from '@daffodil/cart-store-credit';
 import { DaffCartWithStoreCreditFactory } from '@daffodil/cart-store-credit/testing';
+import { DaffProductTestingModule } from '@daffodil/product/testing';
 
 import { DaffCartStoreCreditInMemoryBackendService } from './store-credit.service';
 
@@ -18,6 +19,9 @@ describe('@daffodil/cart-store-credit/driver/in-memory | DaffCartStoreCreditInMe
 
   beforeEach(() => {
     TestBed.configureTestingModule({
+      imports: [
+        DaffProductTestingModule,
+      ],
       providers: [
         DaffCartStoreCreditInMemoryBackendService,
       ],

libs/cart/driver/in-memory/src/backend/cart-items/cart-items.service.spec.ts

@@ -11,6 +11,7 @@ import {
   DaffCartFactory,
   DaffCartItemFactory,
 } from '@daffodil/cart/testing';
+import { DaffProductTestingModule } from '@daffodil/product/testing';
 
 import { DaffInMemoryBackendCartItemsService } from './cart-items.service';
 
@@ -31,6 +32,9 @@ describe('DaffInMemoryBackendCartItemsService', () => {
 
   beforeEach(() => {
     TestBed.configureTestingModule({
+      imports: [
+        DaffProductTestingModule,
+      ],
       providers: [
         DaffInMemoryBackendCartItemsService,
         {

libs/cart/driver/in-memory/src/backend/cart-items/cart-items.service.ts

@@ -14,7 +14,10 @@ import {
 } from '@daffodil/cart';
 import { DaffCartItemFactory } from '@daffodil/cart/testing';
 import { DaffInMemoryDataServiceInterface } from '@daffodil/core/testing';
+import { DaffInMemoryBackendProductService } from '@daffodil/product/driver/in-memory';
 
+import { daffCartInMemoryComputeCartItemPrices } from '../../helpers/compute-cart-item-prices';
+import { daffCartInMemoryComputeCartTotals } from '../../helpers/compute-cart-totals';
 import {
   DAFF_CART_IN_MEMORY_EXTRA_ATTRIBUTES_HOOK,
   DaffCartInMemoryExtraAttributesHook,
@@ -30,6 +33,7 @@ export class DaffInMemoryBackendCartItemsService implements DaffInMemoryDataServ
   constructor(
     private cartItemFactory: DaffCartItemFactory,
     @Inject(DAFF_CART_IN_MEMORY_EXTRA_ATTRIBUTES_HOOK) private extraFieldsHook: DaffCartInMemoryExtraAttributesHook,
+    private productBackend: DaffInMemoryBackendProductService,
   ) {}
 
   get(reqInfo: RequestInfo) {
@@ -105,16 +109,16 @@ export class DaffInMemoryBackendCartItemsService implements DaffInMemoryDataServ
     const cartIndex = reqInfo.collection.findIndex(c => c.id === reqInfo.id);
     const itemChanges = reqInfo.utils.getJsonBody(reqInfo.req);
     const itemIndex = cart.items.findIndex((item) => itemId === item.id);
-    reqInfo.collection[cartIndex] = {
+    reqInfo.collection[cartIndex] = daffCartInMemoryComputeCartTotals({
       ...cart,
       items: cart.items.map(
-        (item, index) => index === itemIndex ? {
+        (item, index) => index === itemIndex ? daffCartInMemoryComputeCartItemPrices({
           ...cart.items[itemIndex],
           ...itemChanges,
-        } : item,
+        }, this.productBackend.products) : item,
       ),
       extra_attributes: this.extraFieldsHook(reqInfo, cart),
-    };
+    }, this.productBackend.products);
 
     return reqInfo.collection[cartIndex];
   }
@@ -124,27 +128,27 @@ export class DaffInMemoryBackendCartItemsService implements DaffInMemoryDataServ
     const cartIndex = reqInfo.collection.findIndex(c => c.id === reqInfo.id);
     const itemInput = reqInfo.utils.getJsonBody(reqInfo.req);
     const existingCartItemIndex = cart.items.findIndex(item => item.product_id === itemInput.productId);
-    if(existingCartItemIndex > -1) {
+    if (existingCartItemIndex > -1) {
       const updatedCartItem = {
         ...cart.items[existingCartItemIndex],
         qty: cart.items[existingCartItemIndex].qty + itemInput.qty,
       };
-      reqInfo.collection[cartIndex] = {
+      reqInfo.collection[cartIndex] = daffCartInMemoryComputeCartTotals({
         ...cart,
         items: cart.items.map(
-          (item, index) => index === existingCartItemIndex ? updatedCartItem : item,
+          (item, index) => index === existingCartItemIndex ? daffCartInMemoryComputeCartItemPrices(updatedCartItem, this.productBackend.products) : item,
         ),
         extra_attributes: this.extraFieldsHook(reqInfo, cart),
-      };
+      }, this.productBackend.products);
     } else {
-      reqInfo.collection[cartIndex] = {
+      reqInfo.collection[cartIndex] = daffCartInMemoryComputeCartTotals({
         ...cart,
         items: [
           ...cart.items,
-          this.transformItemInput(itemInput),
+          daffCartInMemoryComputeCartItemPrices(this.transformItemInput(itemInput), this.productBackend.products),
         ],
         extra_attributes: this.extraFieldsHook(reqInfo, cart),
-      };
+      }, this.productBackend.products);
     }
 
     return reqInfo.collection[cartIndex];
@@ -154,11 +158,11 @@ export class DaffInMemoryBackendCartItemsService implements DaffInMemoryDataServ
     const cart = this.getCart(reqInfo);
     const itemIndex = cart.items.findIndex(({ id }) => itemId === id);
     const cartIndex = reqInfo.collection.findIndex(c => c.id === reqInfo.id);
-    reqInfo.collection[cartIndex] = {
+    reqInfo.collection[cartIndex] = daffCartInMemoryComputeCartTotals({
       ...cart,
       items: cart.items.filter((item, index) => index !== itemIndex),
       extra_attributes: this.extraFieldsHook(reqInfo, cart),
-    };
+    }, this.productBackend.products);
 
     return reqInfo.collection[cartIndex];
   }

libs/cart/driver/in-memory/src/backend/cart-root.service.integration.spec.ts

@@ -22,6 +22,7 @@ import {
   DaffCartPaymentFactory,
   DaffCartShippingRateFactory,
 } from '@daffodil/cart/testing';
+import { DaffProductTestingModule } from '@daffodil/product/testing';
 
 import { DaffInMemoryBackendCartRootService } from './cart-root.service';
 
@@ -51,6 +52,7 @@ describe('DaffInMemoryBackendCartRootService | Integration', () => {
       imports: [
         HttpClientModule,
         HttpClientInMemoryWebApiModule.forRoot(DaffInMemoryBackendCartRootService, { delay: 0 }),
+        DaffProductTestingModule,
       ],
     });
 

libs/cart/driver/in-memory/src/backend/cart-root.service.unit.spec.ts

@@ -23,6 +23,7 @@ import {
   DaffCartFactory,
   DaffCartItemFactory,
 } from '@daffodil/cart/testing';
+import { DaffProductTestingModule } from '@daffodil/product/testing';
 
 import { DaffInMemoryBackendCartRootService } from './cart-root.service';
 
@@ -79,6 +80,9 @@ describe('DaffInMemoryBackendCartRootService | Unit', () => {
 
   beforeEach(() => {
     TestBed.configureTestingModule({
+      imports: [
+        DaffProductTestingModule,
+      ],
       providers: [
         DaffInMemoryBackendCartRootService,
       ],

libs/cart/driver/in-memory/src/backend/cart-shipping-information/cart-shipping-information.service.spec.ts

@@ -9,6 +9,7 @@ import {
   DaffCartFactory,
   DaffCartShippingRateFactory,
 } from '@daffodil/cart/testing';
+import { DaffProductTestingModule } from '@daffodil/product/testing';
 
 import { DaffInMemoryBackendCartShippingInformationService } from './cart-shipping-information.service';
 
@@ -28,6 +29,9 @@ describe('DaffInMemoryBackendCartShippingInformationService', () => {
 
   beforeEach(() => {
     TestBed.configureTestingModule({
+      imports: [
+        DaffProductTestingModule,
+      ],
       providers: [
         DaffInMemoryBackendCartShippingInformationService,
         {

libs/cart/driver/in-memory/src/backend/cart-shipping-information/cart-shipping-information.service.ts

@@ -12,7 +12,9 @@ import {
   DaffCartShippingInformation,
 } from '@daffodil/cart';
 import { DaffInMemoryDataServiceInterface } from '@daffodil/core/testing';
+import { DaffInMemoryBackendProductService } from '@daffodil/product/driver/in-memory';
 
+import { daffCartInMemoryComputeCartTotals } from '../../helpers/compute-cart-totals';
 import {
   DAFF_CART_IN_MEMORY_EXTRA_ATTRIBUTES_HOOK,
   DaffCartInMemoryExtraAttributesHook,
@@ -27,6 +29,7 @@ import {
 export class DaffInMemoryBackendCartShippingInformationService implements DaffInMemoryDataServiceInterface {
   constructor(
     @Inject(DAFF_CART_IN_MEMORY_EXTRA_ATTRIBUTES_HOOK) private extraFieldsHook: DaffCartInMemoryExtraAttributesHook,
+    private productBackend: DaffInMemoryBackendProductService,
   ) {}
 
   get(reqInfo: RequestInfo) {
@@ -65,7 +68,7 @@ export class DaffInMemoryBackendCartShippingInformationService implements DaffIn
     cart.shipping_information = shippingInformation;
 
     return {
-      ...cart,
+      ...daffCartInMemoryComputeCartTotals(cart, this.productBackend.products),
       extra_attributes: this.extraFieldsHook(reqInfo, cart),
     };
   }
@@ -76,7 +79,7 @@ export class DaffInMemoryBackendCartShippingInformationService implements DaffIn
     cart.shipping_information = null;
 
     return {
-      ...cart,
+      ...daffCartInMemoryComputeCartTotals(cart, this.productBackend.products),
       extra_attributes: this.extraFieldsHook(reqInfo, cart),
     };
   }

libs/cart/driver/in-memory/src/backend/cart/cart.service.spec.ts

@@ -12,6 +12,7 @@ import {
   DaffCartFactory,
   DaffCartItemFactory,
 } from '@daffodil/cart/testing';
+import { DaffProductTestingModule } from '@daffodil/product/testing';
 
 import { DaffInMemoryBackendCartService } from './cart.service';
 
@@ -32,6 +33,9 @@ describe('DaffInMemoryBackendCartService', () => {
 
   beforeEach(() => {
     TestBed.configureTestingModule({
+      imports: [
+        DaffProductTestingModule,
+      ],
       providers: [
         DaffInMemoryBackendCartService,
         {
@@ -87,10 +91,10 @@ describe('DaffInMemoryBackendCartService', () => {
     });
 
     it('should return the cart', () => {
-      expect(result.body).toEqual({
-        ...mockCart,
+      expect(result.body).toEqual(jasmine.objectContaining({
+        id: mockCart.id,
         extra_attributes: extraAttributes,
-      });
+      }));
       expect(result.status).toEqual(STATUS.OK);
     });
 

libs/cart/driver/in-memory/src/backend/cart/cart.service.ts

@@ -2,6 +2,7 @@ import {
   Injectable,
   Inject,
 } from '@angular/core';
+import { faker } from '@faker-js/faker';
 import {
   STATUS,
   RequestInfo,
@@ -11,7 +12,9 @@ import {
 import { DaffCart } from '@daffodil/cart';
 import { DaffCartFactory } from '@daffodil/cart/testing';
 import { DaffInMemoryDataServiceInterface } from '@daffodil/core/testing';
+import { DaffInMemoryBackendProductService } from '@daffodil/product/driver/in-memory';
 
+import { daffCartInMemoryComputeCartTotals } from '../../helpers/compute-cart-totals';
 import {
   DAFF_CART_IN_MEMORY_EXTRA_ATTRIBUTES_HOOK,
   DaffCartInMemoryExtraAttributesHook,
@@ -27,6 +30,7 @@ export class DaffInMemoryBackendCartService implements DaffInMemoryDataServiceIn
   constructor(
     private cartFactory: DaffCartFactory,
     @Inject(DAFF_CART_IN_MEMORY_EXTRA_ATTRIBUTES_HOOK) private extraFieldsHook: DaffCartInMemoryExtraAttributesHook,
+    private productBackend: DaffInMemoryBackendProductService,
   ) {}
 
   get(reqInfo: RequestInfo) {
@@ -129,7 +133,7 @@ export class DaffInMemoryBackendCartService implements DaffInMemoryDataServiceIn
     return cart
       ? {
         body: {
-          ...cart,
+          ...daffCartInMemoryComputeCartTotals(cart, this.productBackend.products),
           extra_attributes: this.extraFieldsHook(reqInfo, <DaffCart>cart),
         },
         status: STATUS.OK,

libs/cart/driver/in-memory/src/helpers/compute-cart-item-prices.ts

@@ -0,0 +1,12 @@
+import { faker } from '@faker-js/faker';
+
+import { DaffCartItem } from '@daffodil/cart';
+import { daffMultiply } from '@daffodil/core';
+import { DaffProduct } from '@daffodil/product';
+
+export function daffCartInMemoryComputeCartItemPrices(cartItem: DaffCartItem, products: DaffProduct[]): DaffCartItem {
+  cartItem.price = products.find(({ id }) => id === cartItem.product_id)?.price || 0;
+  cartItem.row_total = daffMultiply(cartItem.price, cartItem.qty);
+
+  return cartItem;
+}

libs/cart/driver/in-memory/src/helpers/compute-cart-totals.ts

@@ -0,0 +1,55 @@
+import { faker } from '@faker-js/faker';
+
+import {
+  DaffCart,
+  DaffCartTotalTypeEnum,
+} from '@daffodil/cart';
+import { DaffProduct } from '@daffodil/product';
+
+export function daffCartInMemoryComputeCartTotals(cart: DaffCart, products: DaffProduct[]): DaffCart {
+  const shipping = cart.shipping_information ? faker.datatype.number({ min: 0, max: 99 }) : 0;
+  const subtotalExcludingTax = cart.items?.reduce((acc, { product_id }) =>
+    acc + (products.find(({ id }) => id === product_id)?.price || 0),
+  0,
+  ) || 0;
+  const discount = faker.datatype.number({ min: 0, max: subtotalExcludingTax });
+  const subtotalIncludingTax = subtotalExcludingTax + cart.totals[DaffCartTotalTypeEnum.tax].value;
+  const subtotalWithDiscountExcludingTax = subtotalExcludingTax - discount;
+  const subtotalWithDiscountIncludingTax = subtotalIncludingTax - discount;
+  const grandTotal = subtotalWithDiscountIncludingTax + shipping;
+
+  return {
+    ...cart,
+    totals: {
+      ...cart.totals,
+      [DaffCartTotalTypeEnum.shipping]: {
+        ...cart.totals[DaffCartTotalTypeEnum.shipping],
+        value: shipping,
+      },
+      [DaffCartTotalTypeEnum.subtotalExcludingTax]: {
+        ...cart.totals[DaffCartTotalTypeEnum.subtotalExcludingTax],
+        value: subtotalExcludingTax,
+      },
+      [DaffCartTotalTypeEnum.discount]: {
+        ...cart.totals[DaffCartTotalTypeEnum.discount],
+        value: discount,
+      },
+      [DaffCartTotalTypeEnum.subtotalIncludingTax]: {
+        ...cart.totals[DaffCartTotalTypeEnum.subtotalIncludingTax],
+        value: subtotalIncludingTax,
+      },
+      [DaffCartTotalTypeEnum.subtotalWithDiscountExcludingTax]: {
+        ...cart.totals[DaffCartTotalTypeEnum.subtotalWithDiscountExcludingTax],
+        value: subtotalWithDiscountExcludingTax,
+      },
+      [DaffCartTotalTypeEnum.subtotalWithDiscountIncludingTax]: {
+        ...cart.totals[DaffCartTotalTypeEnum.subtotalWithDiscountIncludingTax],
+        value: subtotalWithDiscountIncludingTax,
+      },
+      [DaffCartTotalTypeEnum.grandTotal]: {
+        ...cart.totals[DaffCartTotalTypeEnum.grandTotal],
+        value: grandTotal,
+      },
+    },
+  };
+}