fix(subscription): restrict payment methods by country

src/app/subscription/subscription-screen.helpers.ts

@@ -1,4 +1,5 @@
-import type { PaymentPlan } from "@/data/dto/payment";
+import type { PayChannel, PaymentPlan } from "@/data/dto/payment";
+import { getDefaultPayChannelForCountryCode } from "@/lib/payment/default_pay_channel";
 export { getDefaultPayChannelForCountryCode } from "@/lib/payment/default_pay_channel";
 
 import type { CoinsOfferPlanView } from "./components/subscription-coins-offer-section";
@@ -12,6 +13,23 @@ export interface FirstRechargeOfferView {
   subtitle: string;
 }
 
+export function canChooseSubscriptionPayChannel(
+  countryCode: string | null | undefined,
+): boolean {
+  return countryCode?.trim().toUpperCase() === "PH";
+}
+
+export function resolveSubscriptionPayChannel(input: {
+  countryCode: string | null | undefined;
+  requestedPayChannel: PayChannel | null | undefined;
+}): PayChannel {
+  if (!canChooseSubscriptionPayChannel(input.countryCode)) return "stripe";
+  return (
+    input.requestedPayChannel ??
+    getDefaultPayChannelForCountryCode(input.countryCode)
+  );
+}
+
 export function isVipPlan(plan: PaymentPlan): boolean {
   return plan.vipDays !== null;
 }