apply conditional logic for "dataLayer" snippet to only show in ETA a…

…nd not other forms

frontend/template-partials/views/partials/head.html

@@ -1,5 +1,6 @@
 {{#gtmTagId}}
 {{#cookiesAccepted}}
+{{#isETA}}
 <!-- Google Tag Manager Data Layer for ETA -->
 <script {{#nonce}}nonce="{{nonce}}"{{/nonce}}>
   var dataLayer = window.dataLayer || [];
@@ -11,16 +12,17 @@
   });
 </script>
 <!-- End Google Tag Manager Data Layer for ETA -->
+{{/isETA}}
 
-<!-- Google Tag Manager for ETA -->
+<!-- Google Tag Manager -->
 <script {{#nonce}}nonce="{{nonce}}"{{/nonce}}>
   (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
   new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
   j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
   'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
   })(window,document,'script','dataLayer','{{gtmTagId}}');
 </script>
-<!-- End Google Tag Manager for ETA -->
+<!-- End Google Tag Manager -->
 {{/cookiesAccepted}}
 {{/gtmTagId}}
 

lib/ga-tag.js

@@ -63,6 +63,7 @@ module.exports = (app, config) => {
     app.use((req, res, next) => {
       const page = pageView(req.path, pageMap);
       res.locals.gaAllowDebug = config.env === 'development';
+      res.locals.isETA = config.appName === 'ETA';
       res.locals.gaTagId = gaTagId;
       res.locals.ga4TagId = ga4TagId;
       res.locals.gtmTagId = gtmTagId;