From 830fb08a7cf87af1fa22ad08becefa5ba34b5342 Mon Sep 17 00:00:00 2001
From: Gary Barbon <garybarbon@fb.com>
Date: Tue, 14 Sep 2021 10:26:32 -0700
Subject: [PATCH] Added a handler for message echoes

Summary: Bot was failing when receiving the Echo webhook. This corrects it.

Reviewed By: Riandy

Differential Revision: D30933961

fbshipit-source-id: 34c2b68409ee2a7cc57a1feed8d9f67f11e90287
---
 app.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/app.js b/app.js
index f767e8c..56fe5c5 100644
--- a/app.js
+++ b/app.js
@@ -112,6 +112,9 @@ app.post("/webhook", (req, res) => {
         } else if ("delivery" in webhookEvent) {
           console.log("Got a delivery event");
           return;
+        } else if (webhookEvent.message && webhookEvent.message.is_echo) {
+          console.log("Got an echo of our send, mid = " + webhookEvent.message.mid);
+          return;
         }
 
         // Get the sender PSID