From 6a30dbd71aa1c8bf22157546915f7876a31995e3 Mon Sep 17 00:00:00 2001
From: Louis Lam <louislam@users.noreply.github.com>
Date: Sat, 9 Apr 2022 15:44:50 +0800
Subject: [PATCH] Fix Mattermost when channel is empty #1468

---
 server/notification-providers/mattermost.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/server/notification-providers/mattermost.js b/server/notification-providers/mattermost.js
index c2ffc23b8..fe7b685e1 100644
--- a/server/notification-providers/mattermost.js
+++ b/server/notification-providers/mattermost.js
@@ -15,12 +15,17 @@ class Mattermost extends NotificationProvider {
                 let mattermostTestData = {
                     username: mattermostUserName,
                     text: msg,
-                }
-                await axios.post(notification.mattermostWebhookUrl, mattermostTestData)
+                };
+                await axios.post(notification.mattermostWebhookUrl, mattermostTestData);
                 return okMsg;
             }
 
-            const mattermostChannel = notification.mattermostchannel.toLowerCase();
+            let mattermostChannel;
+
+            if (typeof notification.mattermostchannel === "string") {
+                mattermostChannel = notification.mattermostchannel.toLowerCase();
+            }
+
             const mattermostIconEmoji = notification.mattermosticonemo;
             const mattermostIconUrl = notification.mattermosticonurl;