Add Google Analytics

app/components/top_bar_component.html.erb

@@ -1,4 +1,4 @@
-<div data-controller="feedback">
+<div data-controller="feedback analytics">
   <nav class="navbar navbar-expand-md navbar-dark bg-dark topbar" role="navigation">
     <div class="<%= container_classes %>">
       <%= logo_link %>
@@ -49,4 +49,4 @@
       </div>
     </div>
   </div>
-</div>
+</div>

app/javascript/controllers/analytics_controller.js

@@ -0,0 +1,11 @@
+import { Controller } from "@hotwired/stimulus"
+
+export default class extends Controller {
+  connect() {
+    const debug = Boolean(document.head.querySelector("meta[name=analytics_debug]").getAttribute("value"))
+    window.dataLayer = window.dataLayer || [];
+    function gtag(){dataLayer.push(arguments);}
+    gtag('js', new Date());
+    gtag('config', 'G-48Y3Q1L4K0', {'debug_mode': debug});
+  }
+}

app/views/layouts/blacklight.html.erb

@@ -0,0 +1,23 @@
+<!-- This file copies the equivalent file in Blacklight and adds VT Google Analytics in :head -->
+<% content_for(:head) do %>
+  <%= render 'shared/analytics' %>
+<% end %>
+
+<% content_for(:content) do %>
+  <% if content_for? :sidebar %>
+    <section id="content" class="<%= main_content_classes %> order-last" aria-label="<%= t('blacklight.search.documents.aria.search_results') %>">
+      <%= yield %>
+    </section>
+
+    <section id="sidebar" class="<%= sidebar_classes %> order-first" aria-label="<%= t('blacklight.search.documents.aria.limit_search') %>">
+      <%= content_for(:sidebar) %>
+    </section>
+  <% else %>
+    <section class="col-md-12">
+      <%= yield %>
+    </section>
+  <% end %>
+<% end %>
+
+<%= render template: "layouts/blacklight/base" %>
+

app/views/layouts/catalog_result.html.erb

@@ -0,0 +1,16 @@
+<!-- This file copies the equivalent file in Blacklight and adds VT Google Analytics in :head -->
+<% content_for(:head) do %>
+  <%= render 'shared/analytics' %>
+<% end %>
+
+<% content_for(:content) do %>
+  <section class="<%= show_content_classes %>">
+    <%= yield %>
+  </section>
+
+  <section class="<%= show_sidebar_classes %>">
+    <%= content_for(:sidebar) %>
+  </section>
+<% end %>
+
+<%= render template: "layouts/blacklight/base" %>

app/views/shared/_analytics.html.erb

@@ -0,0 +1,2 @@
+<script async src="https://www.googletagmanager.com/gtag/js?id=G-48Y3Q1L4K0"></script>
+<meta name="analytics_debug" value="<%= ENV.fetch('ANALYTICS_DEBUG', 1) %>">