feat: server function for apply current coupon code

src/app/functions/server/applyCoupon.ts

@@ -0,0 +1,48 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { SubscriberRow } from "knex/types/tables";
+import { logger } from "./logging";
+import { SerializedSubscriber } from "../../../next-auth";
+import {
+  addCouponForSubscriber,
+  checkCouponForSubscriber,
+} from "../../../db/tables/subscriber_coupons";
+
+export async function applyCurrentCouponCode(
+  subscriber: SubscriberRow | SerializedSubscriber,
+) {
+  logger.info("fxa_apply_coupon_code", {
+    subscriber: subscriber.id,
+  });
+
+  // current coupon
+  const currentCouponCode = process.env.CURRENT_COUPON_CODE;
+  if (!currentCouponCode) {
+    logger.error(
+      "fxa_apply_coupon_code",
+      "Coupon code not set. Please set the env var: CURRENT_COUPON_CODE",
+    );
+    return {
+      success: false,
+    };
+  }
+
+  try {
+    if (!(await checkCouponForSubscriber(subscriber.id, currentCouponCode))) {
+      await addCouponForSubscriber(subscriber.id, currentCouponCode);
+      return {
+        success: true,
+      };
+    }
+  } catch (ex) {
+    logger.error("fxa_apply_coupon_code", {
+      subscriber_id: subscriber.id,
+      exception: ex,
+    });
+    return {
+      success: false,
+    };
+  }
+}

src/utils/fxa.js

@@ -161,7 +161,7 @@ async function applyCoupon(bearerToken, couponCode) {
       }
     }
     if (subscriptionId) {
-      const applyCouponUrl = `${AppConstants.OAUTH_ACCOUNT_URI}oauth/subscriptions/coupon/apply`
+      const applyCouponUrl = `${AppConstants.OAUTH_ACCOUNT_URI}/oauth/subscriptions/coupon/apply`
       const response = await fetch(applyCouponUrl, {
         method: "PUT",
         headers: {