From 2b3a3895b399c606e65aca83e5ebc4376ba86b02 Mon Sep 17 00:00:00 2001
From: c <c@echo.local>
Date: Wed, 11 Jan 2023 21:44:31 +0000
Subject: [PATCH] Feature - Google Analytics - Use Regex to validate UA as per
 https://support.google.com/analytics/answer/9310895

---
 server/modules/google-analytics.js                   | 7 ++++++-
 server/socket-handlers/status-page-socket-handler.js | 3 ++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/server/modules/google-analytics.js b/server/modules/google-analytics.js
index 55820a857..0a40076d3 100644
--- a/server/modules/google-analytics.js
+++ b/server/modules/google-analytics.js
@@ -3,8 +3,13 @@ let GoogleAnalytics = (() => {
         return "<script async src=\"https://www.googletagmanager.com/gtag/js?id=" + tagId + "\"></script>" +
             "<script>window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date());gtag('config', '" + tagId + "'); </script>";
     }
+    function isValidTag(tagInput) {
+        const re = /^\w{1,2}-\d{8}$/g;
+        return tagInput.match(re) != null;
+    }
     return {
-        getGoogleAnalyticsScript: getGoogleAnalyticsScript
+        getGoogleAnalyticsScript: getGoogleAnalyticsScript,
+        isValidTag: isValidTag
     };
 })();
 
diff --git a/server/socket-handlers/status-page-socket-handler.js b/server/socket-handlers/status-page-socket-handler.js
index 717aba9c4..359ed15bd 100644
--- a/server/socket-handlers/status-page-socket-handler.js
+++ b/server/socket-handlers/status-page-socket-handler.js
@@ -7,6 +7,7 @@ const Database = require("../database");
 const apicache = require("../modules/apicache");
 const StatusPage = require("../model/status_page");
 const { UptimeKumaServer } = require("../uptime-kuma-server");
+const googleAnalytics = require("../modules/google-analytics");
 
 /**
  * Socket handlers for status page
@@ -163,7 +164,7 @@ module.exports.statusPageSocketHandler = (socket) => {
             statusPage.custom_css = config.customCSS;
             statusPage.show_powered_by = config.showPoweredBy;
             statusPage.modified_date = R.isoDateTime();
-            statusPage.google_analytics_tag_id = config.googleAnalyticsId;
+            statusPage.google_analytics_tag_id = googleAnalytics.isValidTag(config.googleAnalyticsId) ? config.googleAnalyticsId : "";
 
             await R.store(statusPage);