feat: add cart and product details features with tests

src/app/app.config.ts

@@ -1,7 +1,8 @@
 import { ApplicationConfig, provideZoneChangeDetection } from '@angular/core';
 import { provideRouter } from '@angular/router';
 import { routes } from './app.routes';
+import { provideHttpClient } from '@angular/common/http';
 
 export const appConfig: ApplicationConfig = {
-  providers: [provideZoneChangeDetection({ eventCoalescing: true }), provideRouter(routes)]
+  providers: [provideZoneChangeDetection({ eventCoalescing: true }), provideRouter(routes), provideHttpClient()]
 };

src/app/app.routes.ts

@@ -1,6 +1,12 @@
 import { Routes } from '@angular/router';
 import {ProductListComponent} from './product-list/product-list.component';
+import { ProductDetailsComponent } from './product-details/product-details.component';
+import { CartComponent } from './cart/cart.component';
+import { ShippingComponent } from './shipping/shipping.component';
 
 export const routes: Routes = [
   { path: '', component: ProductListComponent },
+  { path: 'products/:productId', component: ProductDetailsComponent },
+  { path: 'cart', component: CartComponent },
+  { path: 'shipping', component: ShippingComponent },
 ];

src/app/cart.service.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { CartService } from './cart.service';
+
+describe('CartService', () => {
+  let service: CartService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(CartService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

src/app/cart.service.ts

@@ -0,0 +1,30 @@
+import { Injectable } from '@angular/core';
+import { Product } from './products';
+import { HttpClient } from '@angular/common/http';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class CartService {
+  items: Product[] = [];
+  constructor(
+    private http: HttpClient,
+  ) { }
+
+  addToCart(product: Product) {
+    this.items.push(product);
+  }
+
+  getItems() {
+    return this.items;
+  }
+
+  clearCart() {
+    this.items = [];
+    return this.items;
+  }
+
+  getShippingPrices() {
+    return this.http.get<{type: string, price: number}[]>('/assets/shiping.json');
+  }
+}

src/app/cart/cart.component.html

@@ -0,0 +1,12 @@
+<h3>Cart</h3>
+
+<p>
+  <a routerLink="/shipping">Shipping Prices</a>
+</p>
+
+@for(item of items; track item.id){
+<div class="cart-item">
+  <span>{{ item.name }}</span>
+  <span>{{ item.price | currency }}</span>
+</div>
+}

src/app/cart/cart.component.spec.ts

@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { CartComponent } from './cart.component';
+
+describe('CartComponent', () => {
+  let component: CartComponent;
+  let fixture: ComponentFixture<CartComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [CartComponent]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(CartComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/cart/cart.component.ts

@@ -0,0 +1,21 @@
+import { Component } from '@angular/core';
+import { CartService } from '../cart.service';
+import { Product } from '../products';
+import { CurrencyPipe } from '@angular/common';
+
+@Component({
+  selector: 'app-cart',
+  standalone: true,
+  imports: [CurrencyPipe],
+  templateUrl: './cart.component.html',
+  styleUrl: './cart.component.css'
+})
+export class CartComponent {
+  items: Product[] | undefined = undefined;
+
+  constructor(
+    private cartService: CartService,
+  ) {
+    this.items = this.cartService.getItems();
+  }
+}

src/app/product-alerts/product-alerts.component.html

@@ -0,0 +1,5 @@
+@if(product && product.price > 700){
+<p>
+  <button (click)="notify.emit()" type="button">Notify Me</button>
+</p>
+}

src/app/product-alerts/product-alerts.component.spec.ts

@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ProductAlertsComponent } from './product-alerts.component';
+
+describe('ProductAlertsComponent', () => {
+  let component: ProductAlertsComponent;
+  let fixture: ComponentFixture<ProductAlertsComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ProductAlertsComponent]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(ProductAlertsComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/product-alerts/product-alerts.component.ts

@@ -0,0 +1,14 @@
+import { Component, EventEmitter, Input, Output } from '@angular/core';
+import { Product } from '../products';
+
+@Component({
+  selector: 'app-product-alerts',
+  standalone: true,
+  imports: [],
+  templateUrl: './product-alerts.component.html',
+  styleUrl: './product-alerts.component.css'
+})
+export class ProductAlertsComponent {
+  @Input() product: Product | undefined;
+  @Output() notify = new EventEmitter();
+}

src/app/product-details/product-details.component.html

@@ -0,0 +1,7 @@
+<h2>Product Details</h2>
+
+@if(product){ <div *ngIf="product">
+  <h3>{{ product.name }}</h3>
+  <h4>{{ product.price | currency }}</h4>
+  <p>{{ product.description }}</p> <button type="button" (click)="addToCart(product)">Buy</button>
+</div> }

src/app/product-details/product-details.component.spec.ts

@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ProductDetailsComponent } from './product-details.component';
+
+describe('ProductDetailsComponent', () => {
+  let component: ProductDetailsComponent;
+  let fixture: ComponentFixture<ProductDetailsComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ProductDetailsComponent]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(ProductDetailsComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/product-details/product-details.component.ts

@@ -0,0 +1,30 @@
+import { Component, OnInit } from '@angular/core';
+import { Product, products } from '../products';
+import { ActivatedRoute } from '@angular/router';
+import { CurrencyPipe, NgIf } from '@angular/common';
+import { CartService } from '../cart.service';
+
+@Component({
+  selector: 'app-product-details',
+  standalone: true,
+  imports: [CurrencyPipe, NgIf],
+  templateUrl: './product-details.component.html',
+  styleUrl: './product-details.component.css'
+})
+export class ProductDetailsComponent implements OnInit {
+  product: Product | undefined;
+
+  constructor(private route: ActivatedRoute, private cartService: CartService) { }
+
+  addToCart(product: Product) {
+    this.cartService.addToCart(product);
+    window.alert('Your product has genn thrown into the cart!');
+  }
+
+  ngOnInit(): void {
+    const routeParams = this.route.snapshot.paramMap;
+    const productIdFromRoute = Number(routeParams.get('productId'));
+
+    this.product = products.find(product => product.id === productIdFromRoute);
+  }
+}

src/app/product-list/product-list.component.html

@@ -1 +1,21 @@
 <h2>Products</h2>
+
+@for(product of products; track product.id){
+<div>
+  <h3>
+    <a [title]="product.name + ' details'" [routerLink]="['/products', product.id]">
+      {{ product.name }}
+    </a>
+  </h3>
+
+  @if(product.description){
+  <p>Description: {{product.description}}</p>
+  }
+  <button type="button" (click)="share()">
+    Share
+  </button>
+
+  <app-product-alerts [product]="product" (notify)="onNotify()">
+  </app-product-alerts>
+</div>
+}

src/app/product-list/product-list.component.ts

@@ -1,10 +1,12 @@
 import { Component } from '@angular/core';
 import { products } from '../products';
+import { ProductAlertsComponent } from '../product-alerts/product-alerts.component';
+import { RouterModule } from '@angular/router';
 
 @Component({
   selector: 'app-product-list',
   standalone: true,
-  imports: [],
+  imports: [ProductAlertsComponent, RouterModule],
   templateUrl: './product-list.component.html',
   styleUrl: './product-list.component.css'
 })
@@ -14,4 +16,8 @@ export class ProductListComponent {
   share() {
     window.alert('The product has been shared!');
   }
+
+  onNotify() {
+    window.alert("You will be notified when the product goes on sale");
+  }
 }

src/app/shipping/shipping.component.html

@@ -0,0 +1,8 @@
+<h3>Shipping Prices</h3>
+
+@for(shipping of shippingCosts | async; track shipping.type) {
+<div class="shipping-item">
+  <span>{{ shipping.type }}</span>
+  <span>{{ shipping.price | currency }}</span>
+</div>
+}

src/app/shipping/shipping.component.spec.ts

@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ShippingComponent } from './shipping.component';
+
+describe('ShippingComponent', () => {
+  let component: ShippingComponent;
+  let fixture: ComponentFixture<ShippingComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ShippingComponent]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(ShippingComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/shipping/shipping.component.ts

@@ -0,0 +1,20 @@
+import { Component } from '@angular/core';
+import { CartService } from '../cart.service';
+import { Observable } from 'rxjs';
+import { AsyncPipe, CurrencyPipe } from '@angular/common';
+
+@Component({
+  selector: 'app-shipping',
+  standalone: true,
+  imports: [AsyncPipe, CurrencyPipe],
+  templateUrl: './shipping.component.html',
+  styleUrl: './shipping.component.css'
+})
+export class ShippingComponent {
+  constructor(private cartService: CartService) { }
+  shippingCosts!: Observable<{ type: string, price: number }[]>;
+
+  ngOnInit(): void {
+    this.shippingCosts = this.cartService.getShippingPrices();
+  }
+}

src/app/top-bar/top-bar.component.html

@@ -2,4 +2,6 @@
   <h1>My Store</h1>
 </a>
 
-<a class="button fancy-button"><em class="material-icons">shopping_cart</em>Checkout</a>
+<a routerLink="/cart" class="button fancy-button">
+  <em class="material-icons">shopping_cart</em>Checkout
+</a>