feat(checkout): implement purchase creation and payment intent generation with QR code support

package-lock.json

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@@ -5237,6 +5283,19 @@
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@@ -7033,6 +7157,154 @@
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package.json

@@ -21,6 +21,7 @@
     "@angular/router": "^22.0.0",
     "@angular/ssr": "^22.0.4",
     "@fortawesome/fontawesome-free": "^7.2.0",
+    "angularx-qrcode": "^21.0.5",
     "bootstrap": "^5.3.8",
     "express": "^5.1.0",
     "rxjs": "~7.8.0",

src/app/core/services/checkout.service.ts

@@ -11,13 +11,23 @@ import { BankAccount } from './tenant.interface';
 export class CheckoutService {
   private readonly http = inject(HttpClient);
 
-  async getSelectedBankAccount(tenantCode: string): Promise<BankAccount> {
+  async createPurchase(tenantCode: string, payload: any): Promise<{ id: number }> {
     const response = await firstValueFrom(
-      this.http.get<{ data: BankAccount }>(`${environment.url}tenants/${tenantCode}/bank-accounts/selected`)
+      this.http.post<{ data: { id: number } }>(`${environment.url}tenants/${tenantCode}/compras`, payload)
     );
     if (!response?.data) {
-      throw new Error('No se encontraron los datos de la cuenta bancaria seleccionada.');
+      throw new Error('Error al crear la compra.');
     }
     return response.data;
   }
+
+  async generatePaymentIntent(tenantCode: string, purchaseId: number, method: 'qr' | 'transfer' | 'telepagos'): Promise<any> {
+    const response = await firstValueFrom(
+      this.http.post<any>(`${environment.url}tenants/${tenantCode}/compras/${purchaseId}/payment-intent`, { method })
+    );
+    if (!response) {
+      throw new Error('Error al generar la intención de pago.');
+    }
+    return response;
+  }
 }

src/app/features/store/pages/checkout-page/checkout-page.component.html

@@ -16,6 +16,8 @@
             [selectedPaymentMethod]="selectedPaymentMethod()"
             [copiedTransferField]="copiedTransferField()"
             [transferAccount]="transferAccount()"
+            [isGeneratingIntent]="isGeneratingIntent()"
+            [qrData]="qrData()"
             (paymentMethodChange)="selectPaymentMethod($event)"
             (copyTransferValue)="copyTransferValue($event.field, $event.value)"
             (cancelStep)="onCancel()"

src/app/features/store/pages/checkout-page/checkout-page.component.ts

@@ -63,7 +63,7 @@ export class CheckoutPageComponent {
   protected readonly isStep1Valid = signal(this.form.valid);
   protected readonly paymentMethods: ReadonlyArray<PaymentMethodOption> = [
     { id: 'qr', label: 'QR' },
-    { id: 'transferencia', label: 'Transferencia' },
+    { id: 'transfer', label: 'Transferencia' },
     { id: 'telepagos', label: 'TelePagos' }
   ];
   protected readonly selectedPaymentMethod = signal<PaymentMethod>('qr');
@@ -75,29 +75,15 @@ export class CheckoutPageComponent {
     alias: 'telepagos.ar'
   });
 
+  protected readonly isCreatingPurchase = signal(false);
+  protected readonly createdPurchaseId = signal<number | null>(null);
+  protected readonly isGeneratingIntent = signal(false);
+  protected readonly qrData = signal<string | null>(null);
+
   constructor() {
     this.form.statusChanges
       .pipe(startWith(this.form.status))
       .subscribe(() => this.isStep1Valid.set(this.form.valid));
-
-    void this.loadSelectedBankAccount();
-  }
-
-  private async loadSelectedBankAccount(): Promise<void> {
-    const tenant = this.tenantService.tenant();
-    if (!tenant) return;
-
-    try {
-      const data = await this.checkoutService.getSelectedBankAccount(tenant.codigo);
-      this.transferAccount.set({
-        titular: data.titular,
-        entidad: data.entidad,
-        cvu: data.cvu,
-        alias: data.alias
-      });
-    } catch (error) {
-      console.error('Failed to load selected bank account:', error);
-    }
   }
 
   private mapCartItemToMock(item: CartItem): CartItemMock {
@@ -130,16 +116,76 @@ export class CheckoutPageComponent {
     };
   }
 
-  protected onStep1Continue(): void {
+  protected async onStep1Continue(): Promise<void> {
-    this.stepper.next();
+    if (this.form.invalid) return;
+
+    const tenant = this.tenantService.tenant();
+    if (!tenant) return;
+
+    this.isCreatingPurchase.set(true);
+
+    try {
+      const cartItems = this.cartService.cart()?.items || [];
+      const formValue = this.form.getRawValue();
+      const payload = {
+        ...formValue,
+        nombre_apellido: formValue.nombre,
+        items: cartItems.map((item) => ({
+          producto_variante_id: item.product_variant_id,
+          cantidad: item.cantidad
+        }))
+      };
+
+      const response = await this.checkoutService.createPurchase(tenant.codigo, payload);
+      this.createdPurchaseId.set(response.id);
+      
+      this.stepper.next();
+      
+      // Auto trigger intent for default option
+      void this.selectPaymentMethod(this.selectedPaymentMethod());
+
+    } catch (error) {
+      console.error('Failed to create purchase:', error);
+      // Here we could show an alert or toast
+    } finally {
+      this.isCreatingPurchase.set(false);
+    }
   }
 
   protected onCancel(): void {
     void this.router.navigate(['/']);
   }
 
-  protected selectPaymentMethod(method: PaymentMethod): void {
+  protected async selectPaymentMethod(method: PaymentMethod): Promise<void> {
     this.selectedPaymentMethod.set(method);
+
+    const purchaseId = this.createdPurchaseId();
+    const tenant = this.tenantService.tenant();
+
+    if (!purchaseId || !tenant || method === 'telepagos') {
+      return;
+    }
+
+    this.isGeneratingIntent.set(true);
+
+    try {
+      const response = await this.checkoutService.generatePaymentIntent(tenant.codigo, purchaseId, method);
+      
+      if (method === 'qr' && response.qr_data?.qr_code) {
+        this.qrData.set(response.qr_data.qr_code);
+      } else if (method === 'transfer' && response.transfer_data) {
+        this.transferAccount.set({
+          titular: response.transfer_data.titular,
+          entidad: response.transfer_data.entidad,
+          cvu: response.transfer_data.cvu,
+          alias: response.transfer_data.alias
+        });
+      }
+    } catch (error) {
+      console.error('Failed to generate payment intent:', error);
+    } finally {
+      this.isGeneratingIntent.set(false);
+    }
   }
 
   protected async copyTransferValue(field: TransferField, value: string): Promise<void> {

src/app/features/store/pages/checkout-page/checkout-page.models.ts

@@ -1,6 +1,6 @@
 import { FormControl, FormGroup } from '@angular/forms';
 
-export type PaymentMethod = 'qr' | 'transferencia' | 'telepagos';
+export type PaymentMethod = 'qr' | 'transfer' | 'telepagos';
 export type TransferField = 'cvu' | 'alias';
 
 export interface PaymentMethodOption {

src/app/features/store/pages/checkout-page/checkout-payment-step.component.html

@@ -35,18 +35,26 @@
     </section>
 
     <section class="payment-panel" aria-live="polite">
-      @if (selectedPaymentMethod() === 'qr') {
+      @if (isGeneratingIntent()) {
+        <div class="payment-panel__card" style="text-align: center; padding: 2rem;">
+          <h3 class="payment-panel__title">Cargando información de pago...</h3>
+        </div>
+      } @else if (selectedPaymentMethod() === 'qr') {
         <div class="payment-panel__card">
           <h3 class="payment-panel__title">Ingresa a tu billetera y escanea el siguiente QR</h3>
           <div class="payment-panel__divider"></div>
 
           <div class="qr-code" aria-label="QR de pago">
-            <span class="qr-code__finder qr-code__finder--tl"></span>
+            @if (qrData()) {
-            <span class="qr-code__finder qr-code__finder--tr"></span>
+              <qrcode [qrdata]="qrData()!" [width]="200" [errorCorrectionLevel]="'M'"></qrcode>
-            <span class="qr-code__finder qr-code__finder--bl"></span>
+            } @else {
+              <span class="qr-code__finder qr-code__finder--tl"></span>
+              <span class="qr-code__finder qr-code__finder--tr"></span>
+              <span class="qr-code__finder qr-code__finder--bl"></span>
+            }
           </div>
         </div>
-      } @else if (selectedPaymentMethod() === 'transferencia') {
+      } @else if (selectedPaymentMethod() === 'transfer') {
         <div class="payment-panel__card">
           <h3 class="payment-panel__title">Transferi a la siguiente cuenta desde cualquier billetera</h3>
           <div class="payment-panel__divider"></div>
@@ -133,6 +141,7 @@
     <app-button
       type="button"
       hostClass="checkout-payment__action-btn"
+      [disabled]="isGeneratingIntent()"
     >
       Finalizar compra
     </app-button>

src/app/features/store/pages/checkout-page/checkout-payment-step.component.scss

@@ -219,6 +219,26 @@
     );
   background-size: 18px 18px;
   background-position: 0 0, 9px 9px;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+
+  qrcode {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    width: 100%;
+    height: 100%;
+
+    ::ng-deep canvas,
+    ::ng-deep img {
+      display: block !important;
+      width: 100% !important;
+      height: 100% !important;
+      max-width: 100%;
+      max-height: 100%;
+    }
+  }
 }
 
 .qr-code__finder {

src/app/features/store/pages/checkout-page/checkout-payment-step.component.ts

@@ -1,5 +1,7 @@
 import { ChangeDetectionStrategy, Component, input, output } from '@angular/core';
 
+import { QRCodeComponent } from 'angularx-qrcode';
+
 import { ButtonComponent } from '../../../../shared/components/button/button.component';
 import { IconButtonComponent } from '../../../../shared/components/icon-button/icon-button.component';
 import { PaymentMethod, PaymentMethodOption, TransferAccount, TransferField } from './checkout-page.models';
@@ -7,7 +9,7 @@ import { PaymentMethod, PaymentMethodOption, TransferAccount, TransferField } fr
 @Component({
   selector: 'app-checkout-payment-step',
   standalone: true,
-  imports: [ButtonComponent, IconButtonComponent],
+  imports: [ButtonComponent, IconButtonComponent, QRCodeComponent],
   templateUrl: './checkout-payment-step.component.html',
   styleUrl: './checkout-payment-step.component.scss',
   changeDetection: ChangeDetectionStrategy.OnPush
@@ -17,6 +19,8 @@ export class CheckoutPaymentStepComponent {
   readonly selectedPaymentMethod = input.required<PaymentMethod>();
   readonly copiedTransferField = input<TransferField | null>(null);
   readonly transferAccount = input.required<TransferAccount>();
+  readonly isGeneratingIntent = input<boolean>(false);
+  readonly qrData = input<string | null>(null);
 
   readonly paymentMethodChange = output<PaymentMethod>();
   readonly copyTransferValue = output<{ field: TransferField; value: string }>();