[NEW]Set up livechat connections created from new client (#14236)

* Adds a new method to set up livechat connections.

* Store livechatToken into connection.

app/livechat/server/index.js

@@ -54,6 +54,7 @@ import './methods/startVideoCall';
 import './methods/startFileUploadRoom';
 import './methods/transfer';
 import './methods/webhookTest';
+import './methods/setUpConnection';
 import './methods/takeInquiry';
 import './methods/returnAsInquiry';
 import './methods/saveOfficeHours';

app/livechat/server/methods/setUpConnection.js

@@ -0,0 +1,21 @@
+import { Meteor } from 'meteor/meteor';
+import { check } from 'meteor/check';
+import { Livechat } from '../lib/Livechat';
+
+Meteor.methods({
+	'livechat:setUpConnection'(data) {
+
+		check(data, {
+			token: String,
+		});
+
+		const { token } = data;
+
+		if (!this.connection.livechatToken) {
+			this.connection.livechatToken = token;
+			this.connection.onClose(() => {
+				Livechat.notifyGuestStatusChanged(token, 'offline');
+			});
+		}
+	},
+});