feat(payment): support Indonesia QRIS checkout

src/lib/payment/payment_launch.ts

@@ -11,6 +11,36 @@ import {
 
 const log = new Logger("LibPaymentPaymentLaunch");
 
+export type EzpayLaunchTarget =
+  | { kind: "url"; paymentUrl: string }
+  | { kind: "qr"; qrData: string }
+  | { kind: "error"; errorMessage: string };
+
+function getNonEmptyString(
+  payParams: Record<string, unknown>,
+  ...keys: string[]
+): string | null {
+  for (const key of keys) {
+    const value = payParams[key];
+    if (typeof value === "string" && value.trim().length > 0) {
+      return value.trim();
+    }
+  }
+  return null;
+}
+
+function getHttpPaymentUrl(value: string | null): string | null {
+  if (!value) return null;
+  try {
+    const parsed = new URL(value);
+    return parsed.protocol === "https:" || parsed.protocol === "http:"
+      ? value
+      : null;
+  } catch {
+    return null;
+  }
+}
+
 export function getPaymentUrl(payParams: Record<string, unknown>): string | null {
   const keys = [
     "cashierUrl",
@@ -39,6 +69,61 @@ export function isEzpayPayment(payParams: Record<string, unknown>): boolean {
   return typeof provider === "string" && provider.toLowerCase() === "ezpay";
 }
 
+export function resolveEzpayLaunchTarget(
+  payParams: Record<string, unknown>,
+): EzpayLaunchTarget {
+  const rawChannelType = getNonEmptyString(
+    payParams,
+    "channelType",
+    "channel_type",
+  );
+  const channelType = rawChannelType?.toUpperCase() ?? null;
+  const payData = getNonEmptyString(payParams, "payData", "pay_data");
+
+  if (channelType === "QR") {
+    return payData
+      ? { kind: "qr", qrData: payData }
+      : {
+          kind: "error",
+          errorMessage: "QRIS payment data is missing. Please try again.",
+        };
+  }
+
+  if (channelType === "VA") {
+    return {
+      kind: "error",
+      errorMessage: "Virtual account payments are not supported in this app.",
+    };
+  }
+
+  if (channelType === "URL") {
+    const paymentUrl =
+      getHttpPaymentUrl(payData) ?? getHttpPaymentUrl(getPaymentUrl(payParams));
+    return paymentUrl
+      ? { kind: "url", paymentUrl }
+      : {
+          kind: "error",
+          errorMessage: "Ezpay payment URL is missing or invalid. Please try again.",
+        };
+  }
+
+  if (channelType) {
+    return {
+      kind: "error",
+      errorMessage: `Unsupported Ezpay payment channel: ${channelType}.`,
+    };
+  }
+
+  const legacyPaymentUrl = getHttpPaymentUrl(getPaymentUrl(payParams));
+  return legacyPaymentUrl
+    ? { kind: "url", paymentUrl: legacyPaymentUrl }
+    : {
+        kind: "error",
+        errorMessage:
+          "Ezpay payment parameters did not include a supported URL or QRIS code.",
+      };
+}
+
 export function getStripeClientSecret(
   payParams: Record<string, unknown>,
 ): string | null {