committed

queries/deduplication.js

@@ -0,0 +1,16 @@
+const Notification = require('../models/notification');
+
+async function checkDuplication(notification) {
+  const oneHourAgo = new Date(Date.now() - 60 * 60 * 1000);
+  const similarNotification = await Notification.findOne({
+    userId: notification.userId,
+    message: notification.message,
+    createdAt: { $gte: oneHourAgo },
+    status: 'sent'
+  });
+
+  return !!similarNotification;
+}
+
+module.exports = { checkDuplication };
+