Add GA4 analytics

Use the `load-analytics' script of govuk_publishing_components to add
GA4 analytics to content-tagger. Includes extra configuration to
set the correct domains for GA4 to initialise and code to automatically
accept all cookies to make tracking work.

Gemfile

@@ -21,6 +21,7 @@ gem "uglifier"
 gem "gds-api-adapters"
 gem "gds-sso"
 gem "govuk_admin_template"
+gem "govuk_publishing_components"
 gem "govuk_sidekiq"
 gem "plek"
 

Gemfile.lock

@@ -173,6 +173,18 @@ GEM
       sentry-rails (~> 5.3)
       sentry-ruby (~> 5.3)
       statsd-ruby (~> 1.5)
+    govuk_personalisation (0.16.0)
+      plek (>= 1.9.0)
+      rails (>= 6, < 8)
+    govuk_publishing_components (37.10.0)
+      govuk_app_config
+      govuk_personalisation (>= 0.7.0)
+      kramdown
+      plek
+      rails (>= 6)
+      rouge
+      sprockets (>= 3)
+      sprockets-rails
     govuk_schemas (4.7.0)
       json-schema (>= 2.8, < 4.2)
     govuk_sidekiq (7.1.5)
@@ -222,6 +234,8 @@ GEM
       activerecord
       kaminari-core (= 1.2.2)
     kaminari-core (1.2.2)
+    kramdown (2.4.0)
+      rexml
     language_server-protocol (3.17.0.3)
     link_header (0.0.8)
     logstasher (2.1.5)
@@ -720,6 +734,7 @@ DEPENDENCIES
   gds-sso
   govuk_admin_template
   govuk_app_config
+  govuk_publishing_components
   govuk_schemas
   govuk_sidekiq
   govuk_test

app/assets/javascripts/application.js

@@ -7,6 +7,12 @@
 //= require_self
 //= require jquery.waypoints.min.js
 
+//= require govuk_publishing_components/dependencies
+//= require govuk_publishing_components/analytics
+
 $(document).ready(function () {
   $('.select2:not(.tagging_project):not(.bulk_tagger)').select2({ allowClear: true })
 })
+
+window.GOVUK.approveAllCookieTypes()
+window.GOVUK.cookie('cookies_preferences_set', 'true', { days: 365 })

app/assets/javascripts/domain-config.js

@@ -0,0 +1,24 @@
+window.GOVUK = window.GOVUK || {}
+window.GOVUK.vars = window.GOVUK.vars || {}
+window.GOVUK.vars.extraDomains = [
+  {
+    name: 'production',
+    domains: [
+      'content-tagger.publishing.service.gov.uk'
+    ],
+    initialiseGA4: true,
+    id: 'GTM-W573BJPG',
+    gaProperty: 'UA-26179049-6'
+  },
+  {
+    name: 'integration',
+    domains: [
+      'content-tagger.integration.publishing.service.gov.uk'
+    ],
+    initialiseGA4: true,
+    id: 'GTM-W573BJPG',
+    auth: '2jaYNm4QqCxqsb10EcYo5w',
+    preview: 'env-18',
+    gaProperty: 'UA-26179049-6'
+  }
+]

app/views/layouts/application.html.erb

@@ -1,4 +1,8 @@
 <% content_for :head do %>
+  <meta name="govuk:components_gem_version" content="<%= GovukPublishingComponents::VERSION %>" />
+  <%= javascript_include_tag "domain-config" %>
+  <%= javascript_include_tag "govuk_publishing_components/load-analytics" %>
+
   <%= stylesheet_link_tag "application", media: "all" %>
   <%= javascript_include_tag 'application' %>
   <%= csrf_meta_tags %>

config/application.rb

@@ -19,6 +19,8 @@ class Application < Rails::Application
     # Configure denylisted tag types by publishing app
     config.denylisted_tag_types = config_for(:denylisted_tag_types)
 
+    config.assets.css_compressor = nil
+
     config.active_record.belongs_to_required_by_default = false
 
     # Set asset path to be application specific so that we can put all GOV.UK