fix: Avoid destructuring connectionData when value is undefined

.changeset/brave-brooms-invent.md

@@ -0,0 +1,5 @@
+---
+"@rocket.chat/meteor": patch
+---
+
+Fixes a problem that caused visitor creation to fail when GDPR setting was enabled and visitor was created via Apps Engine or the deprecated `livechat:registerGuest` method.

apps/meteor/app/livechat/server/lib/LivechatTyped.ts

@@ -588,6 +588,10 @@ class LivechatClass {
 		}
 	}
 
+	isValidObject(obj: unknown): obj is Record<string, any> {
+		return typeof obj === 'object' && obj !== null;
+	}
+
 	async registerGuest({
 		id,
 		token,
@@ -653,10 +657,10 @@ class LivechatClass {
 			visitorDataToUpdate.status = status;
 			visitorDataToUpdate.ts = new Date();
 
-			if (settings.get('Livechat_Allow_collect_and_store_HTTP_header_informations')) {
+			if (settings.get('Livechat_Allow_collect_and_store_HTTP_header_informations') && Livechat.isValidObject(connectionData)) {
 				Livechat.logger.debug(`Saving connection data for visitor ${token}`);
 				const { httpHeaders, clientAddress } = connectionData;
-				if (httpHeaders) {
+				if (Livechat.isValidObject(httpHeaders)) {
 					visitorDataToUpdate.userAgent = httpHeaders['user-agent'];
 					visitorDataToUpdate.ip = httpHeaders['x-real-ip'] || httpHeaders['x-forwarded-for'] || clientAddress;
 					visitorDataToUpdate.host = httpHeaders?.host;

apps/meteor/tests/end-to-end/api/livechat/09-visitors.ts

@@ -1,11 +1,11 @@
 import { faker } from '@faker-js/faker';
 import type { ILivechatVisitor } from '@rocket.chat/core-typings';
 import { expect } from 'chai';
-import { before, describe, it } from 'mocha';
+import { before, describe, it, after } from 'mocha';
 import moment from 'moment';
 import { type Response } from 'supertest';
 
-import { getCredentials, api, request, credentials } from '../../../data/api-data';
+import { getCredentials, api, request, credentials, methodCallAnon } from '../../../data/api-data';
 import { createCustomField, deleteCustomField } from '../../../data/livechat/custom-fields';
 import {
 	makeAgentAvailable,
@@ -216,6 +216,30 @@ describe('LIVECHAT - visitors', () => {
 			expect(body.visitor).to.have.property('livechatData');
 			expect(body.visitor.livechatData).to.have.property(customFieldName, 'Not a real address :)');
 		});
+
+		describe('special cases', () => {
+			before(async () => {
+				await updateSetting('Livechat_Allow_collect_and_store_HTTP_header_informations', true);
+			});
+			after(async () => {
+				await updateSetting('Livechat_Allow_collect_and_store_HTTP_header_informations', false);
+			});
+
+			// Note: this had to use the meteor method because the endpoint used `req.headers` which we cannot send as empty
+			// method doesn't pass them to the func allowing us to create a test for it
+			it('should allow to create a visitor without passing connectionData when GDPR setting is enabled', async () => {
+				const token = `${new Date().getTime()}-test`;
+				const response = await request
+					.post(methodCallAnon('livechat:registerGuest'))
+					.send({ message: `{"msg":"method","id":"23","method":"livechat:registerGuest","params":[{ "token": "${token}"}]}` });
+
+				expect(response.body).to.have.property('success', true);
+				const r = JSON.parse(response.body.message);
+
+				expect(r.result).to.have.property('visitor');
+				expect(r.result.visitor).to.have.property('token', token);
+			});
+		});
 	});
 
 	describe('livechat/visitors.info', () => {