Add cart view

src/app/app.module.ts

@@ -12,6 +12,7 @@ import { SocketIoConfig, SocketIoModule } from 'ngx-socket-io';
 import { HttpClientModule } from '@angular/common/http';
 import { AppRoutingModule } from 'src/routes';
 import { NotFoundComponent } from './not-found/not-found.component';
+import { CartComponent } from './cart/cart.component';
 
 const config: SocketIoConfig = { url: 'http://localhost:2009', options: {} };
 
@@ -22,7 +23,8 @@ const config: SocketIoConfig = { url: 'http://localhost:2009', options: {} };
     PaymentComponent,
     PayComponent,
     HelloComponent,
-    NotFoundComponent
+    NotFoundComponent,
+    CartComponent
   ],
   imports: [
     BrowserModule,

src/app/backend.service.ts

@@ -1,3 +1,4 @@
+import { getCurrencySymbol } from '@angular/common';
 import { HttpClient } from '@angular/common/http';
 import { Injectable } from '@angular/core';
 import { Socket } from 'ngx-socket-io';
@@ -26,8 +27,9 @@ export interface ICart {
 }
 
 export interface IPaymentMethod {
-  method: any;
+  method: CryptoUnits;
   amount: number;
+  exRate: number;
 }
 
 export enum PaymentStatus {
@@ -43,19 +45,20 @@ export enum PaymentStatus {
 export interface IInvoice {
   selector: string;
   paymentMethods: IPaymentMethod[];
-  receiveAddress: string;
-  paidWith?: CryptoUnits;
-  paid?: number;
+  paymentMethod?: CryptoUnits;
+  receiveAddress?: string;
   transcationHash?: string;
+  confirmation?: number;
   cart?: ICart[];
   totalPrice?: number;
   currency: string;
-  dueBy: number;
+  dueBy: Date;
   status?: PaymentStatus;
   email?: string;
   successUrl: string;
   cancelUrl: string;
   createdAt?: number;
+
 }
 
 @Injectable({
@@ -70,9 +73,8 @@ export class BackendService {
     selector: '',
     paymentMethods: [],
     receiveAddress: '',
-    paid: 0,
     currency: 'USD',
-    dueBy: Date.now(),
+    dueBy: new Date(),
     successUrl: '',
     cancelUrl: ''
   };
@@ -102,6 +104,9 @@ export class BackendService {
     return this.socket;
   }
 
+  /**
+   * Subscribe to the real-time status of the selected invoice.
+   */
   subscribeTo(selector: string): void {
     this.socket.on('subscribe', (status: boolean) => {
       if (status) {
@@ -118,12 +123,18 @@ export class BackendService {
     this.socket.emit('subscribe', { selector });
   }
 
+  /**
+   * This will update the current invoice
+   */
   updateInvoice(): void {
     if (this.invoice !== undefined || this.invoice !== null) {
       this.setInvoice(this.invoice.selector);
     }
   }
 
+  /**
+   * This will set the current selected invoice by the `selector`.
+   */
   setInvoice(selector: string): Promise<IInvoice> {
     return new Promise(async (resolve, reject) => {
       if (selector === undefined || selector === 'undefined' || selector === '') {
@@ -144,6 +155,9 @@ export class BackendService {
     });
   }
 
+  /**
+   * This will notify the backend that the user just cancelled the payment.
+   */
   cancelInvoice(): Promise<void> {
     return new Promise(async (resolve, reject) => {
       if (this.invoice.selector === '') {
@@ -162,6 +176,9 @@ export class BackendService {
     });
   }
 
+  /**
+   * This will set the payment method of the selected invoice.
+   */
   setPaymentMethod(method: CryptoUnits): Promise<void> {
     return new Promise(async (resolve, reject) => {
       if (this.invoice === null) { reject('Invoice is not set!'); return; }
@@ -170,12 +187,20 @@ export class BackendService {
         responseType: 'json'
       }).toPromise().then(() => {
         this.setInvoice(this.invoice.selector);
+        resolve();
       }).catch(err => {
         reject(err);
       });
     });
   }
 
+  currencyPrefix(): string {
+    return getCurrencySymbol(this.invoice.currency, 'narrow');
+  }
+
+  /**
+   * Can be used if the socket connection is broken or as initial call.
+   */
   getConfirmation(): Promise<number> {
     return new Promise(async (resolve, reject) => {
       if (this.invoice === null || this.invoice.status !== PaymentStatus.UNCONFIRMED) {
@@ -197,7 +222,7 @@ export class BackendService {
   }
 
   /**
-   * @returns Path to icon
+   * @returns Path to icon in assets folder
    */
   getIcon(unit: CryptoUnits): string {
     switch (unit) {
@@ -226,12 +251,30 @@ export class BackendService {
     return null;
   }
 
+  /**
+   * @returns The price to pay by cryptocurrency;
+   */
   getAmount(): string | undefined {
     return this.invoice?.paymentMethods.find(item => {
-      return item.method === CryptoUnits.BITCOIN;
+      return item.method === this.invoice.paymentMethod;
     })?.amount.toFixed(8);
   }
 
+  /**
+   * Calculate the price in crypto of a specifc product.
+   * @param prodcut Index of product in cart
+   */
+  calculateCryptoPrice(productNr: number): number {
+    if (this.invoice.cart === undefined) return 0;
+    if (this.invoice.paymentMethod === undefined) return 0;    
+
+    const product = this.invoice.cart[productNr];
+    const exRate = this.invoice.paymentMethods.find(method => { return method.method === this.invoice.paymentMethod })?.exRate;
+    if (exRate === undefined) return 0;
+
+    return product.quantity * product.price / exRate;
+  }
+
   getStatus(): string {
     switch (this.invoice?.status) {
       case PaymentStatus.PENDING:

src/app/cart/cart.component.css

@@ -0,0 +1,50 @@
+.cart {
+    margin: 0;
+    padding: 0;
+    width: 100%;
+    height: 400px;
+    background-color: #1c1c1c;
+    border-radius: 8px;
+    transform: translateY(-8px);
+    color: #fff;
+}
+
+.cart ul {
+    list-style: none;
+    margin: 0;
+    padding: 20px;
+    overflow-y: auto;
+    height: 359px;
+}
+
+.cart ul li {
+    display: grid;
+    padding: 1rem;
+    grid-template-columns: 64px 1fr auto;
+    grid-column-gap: 1rem;
+    border-radius: 12px;
+}
+
+.cart ul li:nth-child(even) {
+    background-color: #292929;
+}
+
+.image {
+    height: 64px;
+    width: 64px;
+    padding: 0;
+    margin: 0;
+    border-radius: 8px;
+}
+
+.name {
+    font-size: 11pt;
+    width: 80%;
+    margin: auto 0;
+    line-break: loose;
+}
+
+.price {
+    text-align: right;
+    margin: auto;
+}

src/app/cart/cart.component.html

@@ -0,0 +1,10 @@
+<div class="cart" xyz="stagger-0.5 fade-100% down-1 ease-ease" >
+    <ul>
+        <li *ngFor="let item of this.backend.invoice.cart;let indexOfelement=index;" [ngClass]="{'xyz-in': this.state.showCart.value, 'xyz-out': !this.state.showCart.value}">
+            <img [src]="item.image" class="image">
+            <h5 class="name">{{ item.name }}</h5>
+            <span class="price"><b>{{ item.price.toFixed(2) }} {{ this.backend.currencyPrefix() }}</b><br>
+            {{ this.backend.calculateCryptoPrice(indexOfelement).toFixed(8) }} {{ this.backend.invoice.paymentMethod }}</span>
+        </li>
+    </ul>
+</div>

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

@@ -0,0 +1,25 @@
+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({
+      declarations: [ CartComponent ]
+    })
+    .compileComponents();
+  });
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(CartComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/cart/cart.component.ts

@@ -0,0 +1,20 @@
+import { Component, OnInit } from '@angular/core';
+import { BackendService } from '../backend.service';
+import { StateService } from '../state.service';
+
+@Component({
+  selector: 'app-cart',
+  templateUrl: './cart.component.html',
+  styleUrls: ['./cart.component.css']
+})
+export class CartComponent implements OnInit {
+
+  constructor(
+    public backend: BackendService,
+    public state: StateService
+  ) { }
+
+  ngOnInit(): void {
+  }
+
+}

src/app/header/header.component.css

@@ -1,6 +1,7 @@
 .header {
     display: grid;
-    grid-template-columns: 1fr auto;
+    grid-template-columns: auto 1fr auto 1fr auto;
+    grid-template-rows: 1fr;
     margin: 0;
     padding: 0;
     background-color: #fff;
@@ -12,23 +13,43 @@
     border-bottom-right-radius: 0;
 }
 
-.header img {
-    height: 3rem;
+.header .logo {
     margin-top: 0.5rem;
     margin-bottom: 1rem;
-    grid-column: 1;
+    grid-column: 3;
 }
 
-.header a {
+.header .logo img {
+    height: 3rem;
+}
+
+/* Cancel button */
+.cancel {
     color: red;
     border: 1px solid red;
     border-block-end-width: 1px;
     border-radius: 5px;
     padding: 0.8rem;
-    margin: auto 0;
-    height: fit-content;
-    float: right;
+    margin: auto;
     cursor: pointer;
-    grid-column: 2;
+    width: fit-content !important;
+    grid-column: 5;
     transition: .2s ease;
+}
+
+#cart {
+    display: flex;
+    grid-column: 1;
+    vertical-align: middle;
+    margin: auto auto;
+    padding-left: 1rem;
+    cursor: pointer;
+    border-radius: 8px;
+    border: 1px solid #000;
+    padding: 0.8rem;
+}
+#cart span {
+    margin: auto auto;
+    padding-left: .5rem;
+    font-weight: bold;
 }

src/app/header/header.component.html

@@ -1,4 +1,24 @@
 <div class="header">
-    <img src="assets/logo.svg">
-    <a *ngIf="this.backend.isInvoicePending()" (click)="cancel()" [style]="cancelProgressStyle">{{ startCancelling ? 'Are you sure?' : 'Cancel payment'}}</a>
+    <div id="cart" *ngIf="this.backend!.invoice!.status! > 0" (click)="this.state.toggleCart()">
+        <svg
+            xmlns="http://www.w3.org/2000/svg" *ngIf="!this.state.showCart.value" class="icon icon-tabler icon-tabler-shopping-cart"
+            width="32" height="32" viewBox="0 0 24 24" stroke-width="1.5" stroke="#2c3e50" title="Shopping cart"
+            fill="none" stroke-linecap="round" stroke-linejoin="round">
+            <path stroke="none" d="M0 0h24v24H0z" fill="none"/>
+            <circle cx="9" cy="19" r="2" />
+            <circle cx="17" cy="19" r="2" />
+            <path d="M3 3h2l2 12a3 3 0 0 0 3 2h7a3 3 0 0 0 3 -2l1 -7h-15.2" />
+          </svg>
+          <svg xmlns="http://www.w3.org/2000/svg" *ngIf="this.state.showCart.value" class="icon icon-tabler icon-tabler-x"
+            width="32" height="32" viewBox="0 0 24 24" stroke-width="1.5" stroke="#2c3e50" fill="none" stroke-linecap="round" stroke-linejoin="round">
+            <path stroke="none" d="M0 0h24v24H0z" fill="none"/>
+            <line x1="18" y1="6" x2="6" y2="18" />
+            <line x1="6" y1="6" x2="18" y2="18" />
+          </svg>
+          <span>Cart</span>
+    </div>
+    <a href="https://librepay.me" target="_blank" class="logo">
+        <img src="assets/logo.svg">
+    </a>
+    <a class="cancel" *ngIf="this.backend.isInvoicePending()" (click)="cancel()" [style]="cancelProgressStyle">{{ startCancelling ? 'Are you sure?' : 'Cancel payment'}}</a>
 </div>

src/app/header/header.component.ts

@@ -1,5 +1,6 @@
 import { Component, OnInit } from '@angular/core';
 import { BackendService } from '../backend.service';
+import { StateService } from '../state.service';
 
 @Component({
   selector: 'app-header',
@@ -12,7 +13,10 @@ export class HeaderComponent implements OnInit {
   cancelProgress = 0;
   cancelProgressStyle = "";  // This is the style of the cancel button
 
-  constructor(public backend: BackendService) { }
+  constructor(
+    public backend: BackendService,
+    public state: StateService
+  ) { }
 
   ngOnInit(): void {
   }
@@ -21,9 +25,10 @@ export class HeaderComponent implements OnInit {
     if (!this.startCancelling) {
       this.startCancelling = true;
       const animation = setInterval(() => {
-        this.cancelProgress += 0.3;
+        this.cancelProgress += 0.5;
         this.cancelProgressStyle = `
         background-image: linear-gradient(90deg, rgba(255,120,120,0.3) ${this.cancelProgress.toFixed(1)}%, rgba(255,255,255,0) ${this.cancelProgress.toFixed(1)}%);
+        margin-left: 16px;
         transform: scale(1.1);
         `;
         

src/app/pay/pay.component.ts

@@ -1,5 +1,6 @@
 import { Component, OnInit } from '@angular/core';
 import { BackendService } from '../backend.service';
+import { StateService } from '../state.service';
 
 @Component({
   selector: 'app-pay',
@@ -8,7 +9,10 @@ import { BackendService } from '../backend.service';
 })
 export class PayComponent implements OnInit {
 
-  constructor(public backend: BackendService) { }
+  constructor(
+    public backend: BackendService,
+    public state: StateService
+  ) { }
 
   ngOnInit(): void {
   }

src/app/payment/payment.component.html

@@ -3,7 +3,7 @@
 -->
 <div class="payment request" xyz="stagger-2 fade-100% down-1" *ngIf="this.backend.isInvoiceRequested()">
     <h3 id="title">Choose your<br>payment method</h3>
-    <p id="price">{{ this.backend.invoice.totalPrice!.toFixed(2) }} {{ currencyPrefix() }}</p>
+    <p id="price">{{ this.backend.invoice.totalPrice!.toFixed(2) }} {{ this.backend.currencyPrefix() }}</p>
 
     <ul id="list">
         <li class="xyz-in" *ngFor="let coin of this.backend.invoice!!.paymentMethods" (click)="chooseMethod(coin.method)">
@@ -19,10 +19,11 @@
 <!--
     Main view
 -->
-<div class="payment main" xyz="stagger-2 fade-100% down-1 ease-ease" *ngIf="!this.backend.isInvoiceRequested() && ready"
+<div class="payment main" xyz="stagger-0.5 fade-100% down-1 ease-ease" 
+    *ngIf="!this.backend.isInvoiceRequested() && ready && !hideMain"
     [ngClass]="{invalid: status === 'Expired' || status === 'Paid too little' || status === 'Cancelled by user'}">
 
-    <div class="qrWrapper xyz-in">
+    <div class="qrWrapper" [ngClass]="{'xyz-in': !this.state.showCart.value, 'xyz-out': this.state.showCart.value}">
         <div class="qr">
             <img src="assets/Bitcoin.svg">
             <qrcode
@@ -37,13 +38,13 @@
 
     <div class="data">
         <!-- Payment data -->
-        <span id="target" class="xyz-in">Send to
+        <span id="target" [ngClass]="{'xyz-in': !this.state.showCart.value, 'xyz-out': this.state.showCart.value}">Send to
             <h3>{{ this.backend.invoice?.receiveAddress }}</h3>
         </span>
-        <span id="amount" class="xyz-in">Amount
-            <h3>{{ this.backend.getAmount() }} BTC <span class="price"> | {{ this.backend.invoice.totalPrice!.toFixed(2) }} {{ currencyPrefix() }}</span></h3>
+        <span id="amount" [ngClass]="{'xyz-in': !this.state.showCart.value, 'xyz-out': this.state.showCart.value}">Amount
+            <h3>{{ this.backend.getAmount() }} BTC <span class="price"> | {{ this.backend.invoice.totalPrice!.toFixed(2) }} {{ this.backend.currencyPrefix() }}</span></h3>
         </span>
-        <span id="status" class="xyz-in">Status
+        <span id="status" [ngClass]="{'xyz-in': !this.state.showCart.value, 'xyz-out': this.state.showCart.value}">Status
             <h3>
                 {{ status }}
                 <div class="loader" *ngIf="this.status === 'Unconfirmed'">
@@ -66,6 +67,11 @@
     </div>
 </div>
 
+<!--
+    Cart view
+-->
+<app-cart id="cart" [ngStyle]="{'display': !hideMain ? 'none' : 'block'}"></app-cart>
+
 <!--
     Alerts
 -->

src/app/payment/payment.component.ts

@@ -1,8 +1,8 @@
-import { getCurrencySymbol } from '@angular/common';
 import { Component, OnInit } from '@angular/core';
 import { ActivatedRoute } from '@angular/router';
 
 import { BackendService, CryptoUnits } from '../backend.service';
+import { StateService } from '../state.service';
 
 @Component({
   selector: 'app-payment',
@@ -13,15 +13,21 @@ export class PaymentComponent implements OnInit {
 
   paymentSelector = '';
   confirmations = 0;
-  choosenPaymentMethod = CryptoUnits.BITCOIN;
   status: string;
   ready = false;
 
+  // XYZ class (will be xyz-out if cart is shown for example)
+  xyzClass: string;
+  hideMain: boolean;
+
   constructor(
     public backend: BackendService,
+    public state: StateService,
     private route: ActivatedRoute
   ) {
     this.status = this.backend.getStatus();
+    this.hideMain = false;
+    this.xyzClass = 'xyz-in';
   }
 
   ngOnInit(): void {
@@ -31,6 +37,20 @@ export class PaymentComponent implements OnInit {
       this.get();
     });
 
+    this.state.showCart.subscribe(cartStatus => {
+      if (cartStatus) {
+        this.xyzClass = 'xyz-out';
+        setTimeout(() => {
+          this.hideMain = true;
+        }, 700);
+      } else {
+        setTimeout(() => {
+          this.hideMain = false;
+          this.xyzClass = 'xyz-in';
+        }, 600);
+      }
+    })
+
     this.backend.invoiceUpdate.subscribe(newInvoice => {
       this.status = this.backend.getStatus();
     });
@@ -40,10 +60,6 @@ export class PaymentComponent implements OnInit {
     this.backend.setPaymentMethod(coin);
   }
 
-  currencyPrefix(): string {
-    return getCurrencySymbol(this.backend.invoice.currency, 'narrow');
-  }
-
   async get(): Promise<void> {
     await this.backend.setInvoice(this.paymentSelector);
     this.backend.getConfirmation().catch();

src/app/state.service.spec.ts

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

src/app/state.service.ts

@@ -0,0 +1,26 @@
+import { Injectable } from '@angular/core';
+import { BehaviorSubject } from 'rxjs';
+import { BackendService, PaymentStatus } from './backend.service';
+
+@Injectable({
+  providedIn: 'root'
+})
+/**
+ * The state service is responsible to exchange data between components.
+ */
+export class StateService {
+
+  showCart: BehaviorSubject<boolean>;
+
+  constructor(private backend: BackendService) {
+    this.showCart = new BehaviorSubject<boolean>(false);
+    
+    this.backend.invoiceUpdate.subscribe(invoice => {
+      this.showCart.next(false);  // Hide cart if status changes
+    });
+  }
+
+  toggleCart() {
+    this.showCart.next(!this.showCart.value);
+  }
+}

src/styles.css

@@ -11,4 +11,14 @@ body, html {
 :host{
     -webkit-font-smoothing: antialiased;
     -moz-osx-font-smoothing: grayscale;
+}
+
+::-webkit-scrollbar {
+    background-color: transparent;
+    width: 8px;
+}
+
+::-webkit-scrollbar-thumb {
+    background-color: rgba(255, 255, 255);
+    border-radius: 8px;
 }