feat(payments): Do not allow duplicate subscriptions to the same offe…

…ring and interval

apps/payments/next/app/[locale]/[offeringId]/[interval]/checkout/[cartId]/error/en.ftl

@@ -2,3 +2,6 @@ next-payment-error-manage-subscription-button = Manage my subscription
 next-iap-upgrade-contact-support = You can still get this product — please contact support so we can help you.
 next-payment-error-retry-button = Try again
 next-basic-error-message = Something went wrong. Please try again later.
+checkout-error-contact-support-button = Contact Support
+checkout-error-not-eligible = You are not eligible to subscribe to this product - please contact support so we can help you.
+checkout-error-contact-support = Please contact support so we can help you.

apps/payments/next/app/[locale]/[offeringId]/[interval]/checkout/[cartId]/error/page.tsx

@@ -19,17 +19,39 @@ import {
   recordEmitterEventAction,
 } from '@fxa/payments/ui/actions';
 import { CartErrorReasonId } from '@fxa/shared/db/mysql/account';
+import { config } from 'apps/payments/next/config';
 
 // forces dynamic rendering
 // https://nextjs.org/docs/app/api-reference/file-conventions/route-segment-config
 export const dynamic = 'force-dynamic';
 
-const getErrorReason = (reason: CartErrorReasonId | null) => {
+const getErrorReason = (
+  reason: CartErrorReasonId | null,
+  params: CheckoutParams
+) => {
   switch (reason) {
+    case 'cart_eligibility_status_downgrade':
+      return {
+        buttonFtl: 'checkout-error-contact-support-button',
+        buttonLabel: 'Contact Support',
+        buttonUrl: config.supportUrl,
+        message: 'Please contact support so we can help you.',
+        messageFtl: 'checkout-error-contact-support',
+      };
+    case 'cart_eligibility_status_invalid':
+      return {
+        buttonFtl: 'checkout-error-contact-support-button',
+        buttonLabel: 'Contact Support',
+        buttonUrl: config.supportUrl,
+        message:
+          'You are not eligible to subscribe to this product - please contact support so we can help you.',
+        messageFtl: 'checkout-error-not-eligible',
+      };
     case 'iap_upgrade_contact_support':
       return {
         buttonFtl: 'next-payment-error-manage-subscription-button',
         buttonLabel: 'Manage my subscription',
+        buttonUrl: `/${params.offeringId}/${params.interval}/landing`,
         message:
           'You can still get this product — please contact support so we can help you.',
         messageFtl: 'next-iap-upgrade-contact-support',
@@ -38,6 +60,7 @@ const getErrorReason = (reason: CartErrorReasonId | null) => {
       return {
         buttonFtl: 'next-payment-error-retry-button',
         buttonLabel: 'Try again',
+        buttonUrl: `/${params.offeringId}/${params.interval}/landing`,
         message: 'Something went wrong. Please try again later.',
         messageFtl: 'next-basic-error-message',
       };
@@ -74,7 +97,7 @@ export default async function CheckoutError({
     cart.paymentInfo?.type
   );
 
-  const errorReason = getErrorReason(cart.errorReasonId);
+  const errorReason = getErrorReason(cart.errorReasonId, params);
 
   return (
     <>
@@ -87,12 +110,14 @@ export default async function CheckoutError({
           {l10n.getString(errorReason.messageFtl, errorReason.message)}
         </p>
 
-        <Link
-          className="flex items-center justify-center bg-blue-500 hover:bg-blue-700 font-semibold h-12 my-8 rounded-md text-white w-full"
-          href={`/${params.offeringId}/${params.interval}/landing`}
-        >
-          {l10n.getString(errorReason.buttonFtl, errorReason.buttonLabel)}
-        </Link>
+        {errorReason.buttonUrl && (
+          <Link
+            className="flex items-center justify-center bg-blue-500 hover:bg-blue-700 font-semibold h-12 my-8 rounded-md text-white w-full"
+            href={errorReason.buttonUrl}
+          >
+            {l10n.getString(errorReason.buttonFtl, errorReason.buttonLabel)}
+          </Link>
+        )}
       </section>
     </>
   );

apps/payments/next/config/index.ts

@@ -133,6 +133,9 @@ export class PaymentsNextConfig extends NestAppRootConfig {
   @IsString()
   subscriptionsUnsupportedLocations!: string;
 
+  @IsUrl({ require_tld: false })
+  supportUrl!: string;
+
   /**
    * Nextjs Public Environment Variables
    */

libs/payments/cart/src/lib/cart.service.spec.ts

@@ -311,6 +311,74 @@ describe('CartService', () => {
 
       expect(cartManager.createCart).not.toHaveBeenCalled();
     });
+
+    it('returns cart eligibility status downgrade', async () => {
+      const mockResultCart = ResultCartFactory();
+      const mockResolvedCurrency = faker.finance.currencyCode();
+
+      jest
+        .spyOn(promotionCodeManager, 'assertValidPromotionCodeNameForPrice')
+        .mockResolvedValue(undefined);
+      jest
+        .spyOn(currencyManager, 'getCurrencyForCountry')
+        .mockReturnValue(mockResolvedCurrency);
+      jest.spyOn(cartManager, 'createCart').mockResolvedValue(mockResultCart);
+      jest.spyOn(accountManager, 'getAccounts').mockResolvedValue([]);
+      jest
+        .spyOn(eligibilityService, 'checkEligibility')
+        .mockResolvedValue(EligibilityStatus.DOWNGRADE);
+      jest.spyOn(cartService, 'finalizeCartWithError').mockResolvedValue();
+
+      const result = await cartService.setupCart(args);
+
+      expect(cartManager.createCart).toHaveBeenCalledWith({
+        interval: args.interval,
+        offeringConfigId: args.offeringConfigId,
+        amount: mockInvoicePreview.subtotal,
+        uid: args.uid,
+        stripeCustomerId: mockAccountCustomer.stripeCustomerId,
+        experiment: args.experiment,
+        taxAddress,
+        currency: mockResolvedCurrency,
+        eligibilityStatus: CartEligibilityStatus.DOWNGRADE,
+        couponCode: args.promoCode,
+      });
+      expect(result).toEqual(mockResultCart);
+    });
+
+    it('returns cart eligibility status invalid', async () => {
+      const mockResultCart = ResultCartFactory();
+      const mockResolvedCurrency = faker.finance.currencyCode();
+
+      jest
+        .spyOn(promotionCodeManager, 'assertValidPromotionCodeNameForPrice')
+        .mockResolvedValue(undefined);
+      jest
+        .spyOn(currencyManager, 'getCurrencyForCountry')
+        .mockReturnValue(mockResolvedCurrency);
+      jest.spyOn(cartManager, 'createCart').mockResolvedValue(mockResultCart);
+      jest.spyOn(accountManager, 'getAccounts').mockResolvedValue([]);
+      jest
+        .spyOn(eligibilityService, 'checkEligibility')
+        .mockResolvedValue(EligibilityStatus.INVALID);
+      jest.spyOn(cartService, 'finalizeCartWithError').mockResolvedValue();
+
+      const result = await cartService.setupCart(args);
+
+      expect(cartManager.createCart).toHaveBeenCalledWith({
+        interval: args.interval,
+        offeringConfigId: args.offeringConfigId,
+        amount: mockInvoicePreview.subtotal,
+        uid: args.uid,
+        stripeCustomerId: mockAccountCustomer.stripeCustomerId,
+        experiment: args.experiment,
+        taxAddress,
+        currency: mockResolvedCurrency,
+        eligibilityStatus: CartEligibilityStatus.INVALID,
+        couponCode: args.promoCode,
+      });
+      expect(result).toEqual(mockResultCart);
+    });
   });
 
   describe('restartCart', () => {
@@ -720,7 +788,9 @@ describe('CartService', () => {
     });
 
     it('returns cart and upcomingInvoicePreview', async () => {
-      const mockCart = ResultCartFactory({ stripeSubscriptionId: null });
+      const mockCart = ResultCartFactory({
+        stripeSubscriptionId: null,
+      });
       const mockCustomer = StripeResponseFactory(StripeCustomerFactory());
       const mockPrice = StripePriceFactory();
       const mockInvoicePreview = InvoicePreviewFactory();

libs/payments/cart/src/lib/cart.service.ts

@@ -27,7 +27,11 @@ import {
 } from '@fxa/payments/stripe';
 import { ProductConfigurationManager } from '@fxa/shared/cms';
 import { CurrencyManager } from '@fxa/payments/currency';
-import { CartErrorReasonId, CartState } from '@fxa/shared/db/mysql/account';
+import {
+  CartEligibilityStatus,
+  CartErrorReasonId,
+  CartState,
+} from '@fxa/shared/db/mysql/account';
 import { GeoDBManager } from '@fxa/shared/geodb';
 
 import { CartManager } from './cart.manager';
@@ -218,6 +222,20 @@ export class CartService {
       couponCode: args.promoCode,
     });
 
+    if (cartEligibilityStatus === CartEligibilityStatus.INVALID) {
+      await this.finalizeCartWithError(
+        cart.id,
+        CartErrorReasonId.CartEligibilityStatusInvalid
+      );
+    }
+
+    if (cartEligibilityStatus === CartEligibilityStatus.DOWNGRADE) {
+      await this.finalizeCartWithError(
+        cart.id,
+        CartErrorReasonId.CartEligibilityStatusDowngrade
+      );
+    }
+
     return cart;
   }
 

libs/payments/cart/src/lib/cart.utils.ts

@@ -34,7 +34,7 @@ export const cartEligibilityDetailsMap: Record<
   [EligibilityStatus.DOWNGRADE]: {
     eligibilityStatus: CartEligibilityStatus.DOWNGRADE,
     state: CartState.FAIL,
-    errorReasonId: CartErrorReasonId.BASIC_ERROR,
+    errorReasonId: CartErrorReasonId.CartEligibilityStatusDowngrade,
   },
   [EligibilityStatus.BLOCKED_IAP]: {
     eligibilityStatus: CartEligibilityStatus.BLOCKED_IAP,
@@ -44,7 +44,7 @@ export const cartEligibilityDetailsMap: Record<
   [EligibilityStatus.INVALID]: {
     eligibilityStatus: CartEligibilityStatus.INVALID,
     state: CartState.FAIL,
-    errorReasonId: CartErrorReasonId.Unknown,
+    errorReasonId: CartErrorReasonId.CartEligibilityStatusInvalid,
   },
 };