Many an update!

server/api/events/[id]/cancel-registration.post.js

@@ -1,5 +1,8 @@
 import Event from "../../../models/event";
-import { sendEventCancellationEmail } from "../../../utils/resend.js";
+import {
+  sendEventCancellationEmail,
+  sendWaitlistNotificationEmail,
+} from "../../../utils/resend.js";
 
 export default defineEventHandler(async (event) => {
   const id = getRouterParam(event, "id");
@@ -71,6 +74,39 @@ export default defineEventHandler(async (event) => {
       console.error("Failed to send cancellation email:", emailError);
     }
 
+    // Notify waitlisted users if waitlist is enabled and there are entries
+    if (
+      eventDoc.tickets?.waitlist?.enabled &&
+      eventDoc.tickets.waitlist.entries?.length > 0
+    ) {
+      try {
+        const eventData = {
+          title: eventDoc.title,
+          slug: eventDoc.slug,
+          _id: eventDoc._id,
+          startDate: eventDoc.startDate,
+          endDate: eventDoc.endDate,
+          location: eventDoc.location,
+        };
+
+        // Notify the first person on the waitlist who hasn't been notified yet
+        const waitlistEntry = eventDoc.tickets.waitlist.entries.find(
+          (entry) => !entry.notified
+        );
+
+        if (waitlistEntry) {
+          await sendWaitlistNotificationEmail(waitlistEntry, eventData);
+
+          // Mark as notified
+          waitlistEntry.notified = true;
+          await eventDoc.save();
+        }
+      } catch (waitlistError) {
+        // Log error but don't fail the cancellation
+        console.error("Failed to notify waitlist:", waitlistError);
+      }
+    }
+
     return {
       success: true,
       message: "Registration cancelled successfully",