From 9045c0d09be1ec728cbaba4be3733d96d6cc963f Mon Sep 17 00:00:00 2001
From: Kevin Aleman <kaleman960@gmail.com>
Date: Tue, 21 Nov 2023 13:22:49 -0600
Subject: [PATCH] regression: `saveGuest` triggering app events for invalid
 visitor ids (#31037)

---
 apps/meteor/app/livechat/server/lib/LivechatTyped.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/apps/meteor/app/livechat/server/lib/LivechatTyped.ts b/apps/meteor/app/livechat/server/lib/LivechatTyped.ts
index 27c99d4e100..e9fdfe7050e 100644
--- a/apps/meteor/app/livechat/server/lib/LivechatTyped.ts
+++ b/apps/meteor/app/livechat/server/lib/LivechatTyped.ts
@@ -1343,6 +1343,12 @@ class LivechatClass {
 
 	async saveGuest(guestData: Pick<ILivechatVisitor, '_id' | 'name' | 'livechatData'> & { email?: string; phone?: string }, userId: string) {
 		const { _id, name, email, phone, livechatData = {} } = guestData;
+
+		const visitor = await LivechatVisitors.findOneById(_id, { projection: { _id: 1 } });
+		if (!visitor) {
+			throw new Error('error-invalid-visitor');
+		}
+
 		this.logger.debug({ msg: 'Saving guest', guestData });
 		const updateData: {
 			name?: string | undefined;