Fallback behavior for case-sensitivity issues in email lookup (#4188)

src/app/functions/server/getSubscriberEmails.ts

@@ -5,6 +5,7 @@
 import { Session } from "next-auth";
 import { getSubscriberByEmail } from "../../../db/tables/subscribers.js";
 import { getUserEmails } from "../../../db/tables/emailAddresses.js";
+import { logger } from "./logging.js";
 
 /**
  * NOTE: new function to replace getUserBreaches
@@ -15,7 +16,21 @@ export async function getSubscriberEmails(
   user: Session["user"],
 ): Promise<string[]> {
   const emailArray: string[] = [user.email];
-  const subscriber = await getSubscriberByEmail(user.email);
+  // FIXME case-insensitivity issues, fallback to previous behavior https://mozilla-hub.atlassian.net/browse/MNTOR-2936
+  const email = user.subscriber?.fxa_profile_json?.email;
+
+  let subscriber;
+  if (email) {
+    subscriber = await getSubscriberByEmail(email);
+  }
+  if (!subscriber?.id) {
+    logger.warn("fallback_subscriber_email", { user });
+    subscriber = await getSubscriberByEmail(user.email);
+  }
+  if (!subscriber?.id) {
+    logger.error("no_subscriber_for_email", { user });
+    throw new Error("no subscriber ID for email");
+  }
   (await getUserEmails(subscriber.id)).forEach((e) => emailArray.push(e.email));
   return emailArray;
 }