fix(checkout): handle expired purchase exits

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

@@ -460,7 +460,7 @@ describe('CheckoutPageComponent payment validation', () => {
     expect(routerStub.navigate).toHaveBeenCalledWith(['/checkout/status', 25]);
   });
 
-  it('shows the API error in a toast when cancelling the purchase fails', async () => {
+  it('shows the API error and redirects to status when cancellation finds an expired purchase', async () => {
     const message = 'La compra venció. Iniciá una nueva compra.';
     checkoutServiceStub.cancelPurchase.mockRejectedValue({
       error: { code: 'purchase.expired', message },
@@ -470,7 +470,9 @@ describe('CheckoutPageComponent payment validation', () => {
     await component.onModifyPurchase();
 
     expect(toastServiceStub.danger).toHaveBeenCalledWith(message);
-    expect(routerStub.navigate).not.toHaveBeenCalled();
+    expect(routerStub.navigate).toHaveBeenCalledWith(['/checkout/status', 25], {
+      queryParams: { status: 'expired' },
+    });
     expect(globalLoadingServiceStub.start).toHaveBeenCalledOnce();
     expect(globalLoadingServiceStub.stop).toHaveBeenCalledOnce();
     expect(component.isCancellingPurchase()).toBe(false);
@@ -587,7 +589,24 @@ describe('CheckoutPageComponent payment validation', () => {
     expect(component.createdPurchaseId()).toBe(25);
   });
 
-  it('shows the API message and redirects home when a checkout operation finds an expired purchase', async () => {
+  it('allows leaving checkout when cancellation finds an expired stock reservation', async () => {
+    const message = 'La reserva de stock venció. Usá el carrito activo para continuar.';
+    checkoutServiceStub.cancelPurchase.mockRejectedValue({
+      error: { code: 'stock_reservation.expired', message },
+    });
+    const { component } = createComponent();
+
+    await expect(component.canDeactivate()).resolves.toBe(true);
+
+    expect(toastServiceStub.danger).toHaveBeenCalledWith(message);
+    expect(cartServiceStub.loadCart).toHaveBeenCalledOnce();
+    expect(component.createdPurchaseId()).toBeNull();
+    expect(component.createdPurchase()).toBeNull();
+    expect(globalLoadingServiceStub.start).toHaveBeenCalledOnce();
+    expect(globalLoadingServiceStub.stop).toHaveBeenCalledOnce();
+  });
+
+  it('shows the API message and redirects to status when a checkout operation finds an expired purchase', async () => {
     checkoutServiceStub.generatePaymentIntent.mockRejectedValue(
       new HttpErrorResponse({
         status: 422,
@@ -604,10 +623,35 @@ describe('CheckoutPageComponent payment validation', () => {
     expect(toastServiceStub.danger).toHaveBeenCalledWith(
       'La compra venci\u00f3. Inici\u00e1 una nueva compra.',
     );
-    expect(routerStub.navigate).toHaveBeenCalledWith(['/']);
+    expect(routerStub.navigate).toHaveBeenCalledWith(['/checkout/status', 25], {
+      queryParams: { status: 'expired' },
+    });
     expect(component.isGeneratingIntent()).toBe(false);
   });
 
+  it('redirects to status when QR polling receives a purchase-expired response', async () => {
+    checkoutServiceStub.getPurchase.mockRejectedValue(
+      new HttpErrorResponse({
+        status: 422,
+        error: {
+          code: 'purchase.expired',
+          message: 'La compra venci\u00f3. Inici\u00e1 una nueva compra.',
+        },
+      }),
+    );
+    const { component } = createComponent();
+
+    await component.selectPaymentMethod('qr');
+    await vi.advanceTimersByTimeAsync(5_000);
+
+    expect(routerStub.navigate).toHaveBeenCalledWith(['/checkout/status', 25], {
+      queryParams: { status: 'expired' },
+    });
+    expect(toastServiceStub.danger).toHaveBeenCalledWith(
+      'La compra venci\u00f3. Inici\u00e1 una nueva compra.',
+    );
+  });
+
   it('treats a generic customer-data error as expired when the local deadline passed', () => {
     const { component } = createComponent();
     component.createdPurchase.set({
@@ -635,6 +679,8 @@ describe('CheckoutPageComponent payment validation', () => {
     expect(toastServiceStub.danger).toHaveBeenCalledWith(
       'La compra venci\u00f3. Inici\u00e1 una nueva compra.',
     );
-    expect(routerStub.navigate).toHaveBeenCalledWith(['/']);
+    expect(routerStub.navigate).toHaveBeenCalledWith(['/checkout/status', 25], {
+      queryParams: { status: 'expired' },
+    });
   });
 });

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

@@ -296,6 +296,18 @@ export class CheckoutPageComponent implements OnInit, OnDestroy {
       return true;
     } catch (error) {
       console.error('Failed to cancel the current purchase:', error);
+
+      if (this.isStockReservationExpiredError(error)) {
+        this.showRequestError(error, 'La reserva de stock venció.');
+        this.cartService.loadCart().subscribe({
+          error: (refreshError) => console.error('Error refreshing expired cart', refreshError),
+        });
+        this.createdPurchaseId.set(null);
+        this.createdPurchase.set(null);
+        this.navigationStarted = true;
+        return true;
+      }
+
       this.showRequestError(error, 'No se pudo cancelar la compra.');
       return false;
     } finally {
@@ -492,8 +504,17 @@ export class CheckoutPageComponent implements OnInit, OnDestroy {
         this.navigateToPurchaseStatus(purchaseId);
         return;
       }
+
+      if (purchase.status === 'expired') {
+        this.navigateToPurchaseStatus(purchaseId);
+        return;
+      }
     } catch (error) {
       console.error('Failed to validate transfer payment:', error);
+      if (this.isPurchaseExpiredError(error)) {
+        this.showRequestError(error, 'La compra venció. Iniciá una nueva compra.');
+        return;
+      }
     }
 
     if (runId !== this.transferPollingRunId) {
@@ -575,8 +596,17 @@ export class CheckoutPageComponent implements OnInit, OnDestroy {
         this.qrPaymentStatus.set('failed');
         return;
       }
+
+      if (purchase.status === 'expired') {
+        this.navigateToPurchaseStatus(purchaseId);
+        return;
+      }
     } catch (error) {
       console.error('Failed to validate QR payment:', error);
+      if (this.isPurchaseExpiredError(error)) {
+        this.showRequestError(error, 'La compra venció. Iniciá una nueva compra.');
+        return;
+      }
     } finally {
       if (runId === this.qrPollingRunId) {
         this.isCheckingQrPayment.set(false);
@@ -683,15 +713,17 @@ export class CheckoutPageComponent implements OnInit, OnDestroy {
       }
     } catch (error) {
       console.error('Failed to load purchase:', error);
-      this.showRequestError(error, 'No se pudo cargar la compra.');
+      const expired = this.showRequestError(error, 'No se pudo cargar la compra.');
-      void this.router.navigate(['/']);
+      if (!expired) {
+        void this.router.navigate(['/']);
+      }
     }
   }
 
-  private showRequestError(error: unknown, fallbackMessage: string): void {
+  private showRequestError(error: unknown, fallbackMessage: string): boolean {
     const payload =
       typeof error === 'object' && error !== null && 'error' in error
-        ? (error as { error?: { message?: unknown } }).error
+        ? (error as { error?: ApiErrorResponse }).error
         : undefined;
     const message =
       typeof payload?.message === 'string' && payload.message.trim()
@@ -699,6 +731,13 @@ export class CheckoutPageComponent implements OnInit, OnDestroy {
         : fallbackMessage;
 
     this.toastService.danger(message);
+
+    if (payload?.code === 'purchase.expired') {
+      this.navigateToExpiredPurchaseStatus();
+      return true;
+    }
+
+    return false;
   }
 
   private handleCheckoutError(error: unknown, fallbackMessage: string): boolean {
@@ -717,7 +756,7 @@ export class CheckoutPageComponent implements OnInit, OnDestroy {
           ? response.message
           : 'La compra venció. Iniciá una nueva compra.',
       );
-      void this.router.navigate(['/']);
+      this.navigateToExpiredPurchaseStatus();
       return true;
     }
 
@@ -729,6 +768,42 @@ export class CheckoutPageComponent implements OnInit, OnDestroy {
     return false;
   }
 
+  private navigateToExpiredPurchaseStatus(): void {
+    const purchaseId = this.createdPurchaseId() ?? this.createdPurchase()?.id;
+
+    if (purchaseId) {
+      if (this.navigationStarted) {
+        return;
+      }
+
+      this.navigationStarted = true;
+      this.stopQrPolling();
+      this.stopTransferPolling();
+      void this.router.navigate(['/checkout/status', purchaseId], {
+        queryParams: { status: 'expired' },
+      });
+      return;
+    }
+
+    void this.router.navigate(['/']);
+  }
+
+  private isPurchaseExpiredError(error: unknown): boolean {
+    if (typeof error !== 'object' || error === null || !('error' in error)) {
+      return false;
+    }
+
+    return (error as { error?: ApiErrorResponse }).error?.code === 'purchase.expired';
+  }
+
+  private isStockReservationExpiredError(error: unknown): boolean {
+    if (typeof error !== 'object' || error === null || !('error' in error)) {
+      return false;
+    }
+
+    return (error as { error?: ApiErrorResponse }).error?.code === 'stock_reservation.expired';
+  }
+
   private hasExpiredPurchase(): boolean {
     const purchase = this.createdPurchase();
 

src/app/features/store/pages/purchase-status-page/purchase-status-page.component.spec.ts

@@ -66,7 +66,7 @@ describe('PurchaseStatusPageComponent', () => {
     TestBed.resetTestingModule();
   });
 
-  async function render(hasGeneratedTickets: boolean) {
+  async function render(hasGeneratedTickets: boolean, forcedStatus?: string) {
     const checkoutService = {
       getPurchase: vi.fn().mockResolvedValue(purchase(hasGeneratedTickets)),
       withCustomLoading() {
@@ -85,7 +85,14 @@ describe('PurchaseStatusPageComponent', () => {
         { provide: TenantService, useValue: { tenant: () => tenant } },
         {
           provide: ActivatedRoute,
-          useValue: { snapshot: { paramMap: convertToParamMap({ id: '42' }) } },
+          useValue: {
+            snapshot: {
+              paramMap: convertToParamMap({ id: '42' }),
+              queryParamMap: convertToParamMap(
+                forcedStatus ? { status: forcedStatus } : {},
+              ),
+            },
+          },
         },
         { provide: Router, useValue: router },
       ],
@@ -134,6 +141,14 @@ describe('PurchaseStatusPageComponent', () => {
     openSpy.mockRestore();
   });
 
+  it('shows the expired result without polling when checkout redirects after expiration', async () => {
+    const { element, checkoutService } = await render(false, 'expired');
+
+    expect(element.textContent).toContain('LA COMPRA VENCIÓ');
+    expect(element.textContent).not.toContain('ESTAMOS VERIFICANDO TU PAGO');
+    expect(checkoutService.getPurchase).not.toHaveBeenCalled();
+  });
+
   it('polls every five seconds while the payment is pending and shows the confirmation', async () => {
     vi.useFakeTimers();
 

src/app/features/store/pages/purchase-status-page/purchase-status-page.component.ts

@@ -72,6 +72,12 @@ export class PurchaseStatusPageComponent implements OnInit, OnDestroy {
     this.purchaseId = purchaseId;
     this.tenantCode = tenant.codigo;
 
+    if (this.route.snapshot.queryParamMap?.get('status') === 'expired') {
+      this.status.set('expired');
+      this.isLoading.set(false);
+      return;
+    }
+
     void this.loadStatus();
   }
 
@@ -107,7 +113,10 @@ export class PurchaseStatusPageComponent implements OnInit, OnDestroy {
       console.error('Failed to fetch purchase status:', error);
 
       if (!this.isDestroyed) {
-        if (isPolling) {
+        if (this.isPurchaseExpiredError(error)) {
+          this.status.set('expired');
+          this.stopPolling();
+        } else if (isPolling) {
           this.schedulePolling();
         } else {
           this.status.set('error');
@@ -154,6 +163,14 @@ export class PurchaseStatusPageComponent implements OnInit, OnDestroy {
     return 'pending';
   }
 
+  private isPurchaseExpiredError(error: unknown): boolean {
+    if (typeof error !== 'object' || error === null || !('error' in error)) {
+      return false;
+    }
+
+    return (error as { error?: { code?: string } }).error?.code === 'purchase.expired';
+  }
+
   protected goToTickets(): void {
     const route = this.ticketsRoute();