From a3162f1d32baf48e562940b4afbfe83a42883652 Mon Sep 17 00:00:00 2001
From: sveinpg <sveinpg.gmail.com>
Date: Sun, 9 Dec 2018 22:57:14 +0100
Subject: [PATCH] Add GA script for tracking 404s

---
 website/pages/en/404.js | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/website/pages/en/404.js b/website/pages/en/404.js
index d75d0a99ca..96b01f2c36 100644
--- a/website/pages/en/404.js
+++ b/website/pages/en/404.js
@@ -1,9 +1,29 @@
 const React = require("react");
+const siteConfig = require(`${process.cwd()}/siteConfig.js`);
 
 class ErrorPage extends React.Component {
+  getTrackingScript() {
+    if (!siteConfig.gaTrackingId) {
+      return null;
+    }
+
+    return {__html:`
+      ga('create', "${siteConfig.gaTrackingId}");
+      ga('send', {
+        hitType: 'event',
+        eventCategory: '404 Response',
+        eventAction: window.location.href,
+        eventLabel: document.referrer
+      });`
+    }
+  }
+
   render() {
+    const trackingScript = this.getTrackingScript();
+
     return (
       <div className="error-page">
+      {trackingScript && <script dangerouslySetInnerHTML={trackingScript}/>}
         <div className="error-message">
           <div className=" error-message-container container">
             <span>404 </span>