Refactor GA4 code

Gemfile.lock

@@ -181,14 +181,15 @@ GEM
     govuk_personalisation (0.15.0)
       plek (>= 1.9.0)
       rails (>= 6, < 8)
-    govuk_publishing_components (36.1.0)
+    govuk_publishing_components (37.0.0)
       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_test (4.0.1)
@@ -241,7 +242,7 @@ GEM
     msgpack (1.7.2)
     multi_test (1.1.0)
     mutex_m (0.2.0)
-    net-imap (0.4.7)
+    net-imap (0.4.8)
       date
       net-protocol
     net-pop (0.1.2)

app/assets/javascripts/analytics-ga4/ga4-finder-tracker.js

@@ -6,24 +6,6 @@
   GOVUK.analyticsGa4 = GOVUK.analyticsGa4 || {}
 
   GOVUK.analyticsGa4.Ga4FinderTracker = {
-
-    // Finds the parent div containing the filters. Loops through each child div that has data-ga4-filter-parent on it . Sets an index on each of these child divs.
-    setFilterIndexes: function () {
-      var filterContainer = document.querySelector('[data-ga4-filter-container]')
-
-      if (!filterContainer) {
-        return
-      }
-
-      var filterParents = filterContainer.querySelectorAll('[data-ga4-filter-parent]')
-
-      for (var i = 0; i < filterParents.length; i++) {
-        filterParents[i].setAttribute('data-ga4-index', JSON.stringify({ index_section: i + 1, index_section_count: filterParents.length }))
-      }
-
-      window.GOVUK.triggerEvent(window, 'ga4-filter-indexes-added')
-    },
-
     // Called when the search results updates. Takes the event target, and a string containing the type of change and element type. Creates the GTM schema and pushes it.
     // changeEventMetadata is a string referring to the type of form change and the element type that triggered it. For example 'update-filter checkbox'.
     trackChangeEvent: function (eventTarget, changeEventMetadata) {
@@ -157,31 +139,6 @@
       } catch (e) {
         console.error('GA4 configuration error: ' + e.message, window.location)
       }
-    },
-
-    addFilterButtonTracking: function (button, section) {
-      button.setAttribute('data-ga4-expandable', '')
-      var ga4JSON = { event_name: 'select_content', type: 'finder', section: section }
-
-      try {
-        var index = button.closest('[data-ga4-index]') || undefined
-        if (index) {
-          var indexData = JSON.parse(index.getAttribute('data-ga4-index'))
-          // flatten the attributes in index into the main data
-          for (var prop in indexData) {
-            ga4JSON[prop] = indexData[prop]
-          }
-        } else {
-          console.warn('No data-ga4-index found on the following element or its parents:')
-          console.warn(button)
-        }
-      } catch (e) {
-        // if there's a problem with the index object, don't add the attribute
-        console.error('GA4 configuration error: ' + e.message, window.location)
-        return
-      }
-
-      button.setAttribute('data-ga4-event', JSON.stringify(ga4JSON))
     }
   }
 

app/assets/javascripts/components/expander.js

@@ -69,17 +69,21 @@ window.GOVUK.Modules = window.GOVUK.Modules || {}; // if this ; is omitted, none
     $button.setAttribute('aria-expanded', expanded)
     $button.setAttribute('aria-controls', this.$content.getAttribute('id'))
 
-    // GA4 Accordion tracking. Relies on the ga4-finder-tracker setting the index first, so we wrap this in a custom event.
-    window.addEventListener('ga4-filter-indexes-added', function () {
-      if (window.GOVUK.analyticsGa4) {
-        if (window.GOVUK.analyticsGa4.Ga4FinderTracker) {
-          window.GOVUK.analyticsGa4.Ga4FinderTracker.addFilterButtonTracking($button, this.$toggle.innerHTML)
+    var buttonAttributes = this.$module.getAttribute('data-button-data-attributes')
+    if (buttonAttributes) {
+      try {
+        buttonAttributes = JSON.parse(buttonAttributes)
+        for (var rawKey in buttonAttributes) {
+          var key = rawKey.replace(/_/g, '-').toLowerCase()
+          var rawValue = buttonAttributes[rawKey]
+          var value = typeof rawValue === 'object' ? JSON.stringify(rawValue) : rawValue
+          $button.setAttribute('data-' + key, value)
         }
+      } catch (e) {
+        console.error('Error with expander button data attributes, invalid JSON passed' + e.message, window.location)
       }
-    }.bind(this))
-
+    }
     $button.innerHTML = toggleHtml
-
     this.$toggle.parentNode.replaceChild($button, this.$toggle)
   }
 

app/assets/javascripts/live_search.js

@@ -56,11 +56,9 @@
 
     if (document.readyState === 'complete') {
       this.Ga4EcommerceTracking()
-      this.ga4SetFilterIndexes()
     } else {
       window.addEventListener('DOMContentLoaded', function () {
         this.Ga4EcommerceTracking()
-        this.ga4SetFilterIndexes()
       }.bind(this))
     }
 
@@ -634,19 +632,5 @@
     }
   }
 
-  LiveSearch.prototype.ga4SetFilterIndexes = function () {
-    if (GOVUK.analyticsGa4 && GOVUK.analyticsGa4.Ga4FinderTracker) {
-      var consentCookie = GOVUK.getConsentCookie()
-
-      if (consentCookie && consentCookie.settings) {
-        GOVUK.analyticsGa4.Ga4FinderTracker.setFilterIndexes()
-      } else {
-        window.addEventListener('cookie-consent', function () {
-          GOVUK.analyticsGa4.Ga4FinderTracker.setFilterIndexes()
-        })
-      }
-    }
-  }
-
   GOVUK.LiveSearch = LiveSearch
 }())

app/controllers/finders_controller.rb

@@ -92,7 +92,7 @@ def render_component(partial, locals)
   def result_set_presenter
     @result_set_presenter ||= ResultSetPresenter.new(
       content_item,
-      facets,
+      all_facets,
       results,
       filter_params,
       sort_presenter,
@@ -106,12 +106,18 @@ def results
     @results ||= ResultSetParser.parse(search_results)
   end
 
+  def all_facets
+    return @facets if defined?(@facets)
+
+    FacetsBuilder.new(content_item:, search_results:, value_hash: filter_params).facets
+  end
+
   def facets
-    @facets ||= FacetsBuilder.new(content_item:, search_results:, value_hash: filter_params).facets
+    FacetsIterator.new(all_facets.select(&:filterable?))
   end
 
   def signup_links
-    @signup_links ||= SignupLinksPresenter.new(content_item, facets, keywords).signup_links
+    @signup_links ||= SignupLinksPresenter.new(content_item, all_facets, keywords).signup_links
   end
 
   def initialize_search_query(is_for_feed: false)
@@ -174,7 +180,7 @@ def keywords
 
   def facet_tags
     @facet_tags ||= FacetTagsPresenter.new(
-      facets.select(&:filterable?),
+      facets,
       sort_presenter,
       i_am_a_topic_page_finder:,
     )

app/lib/facets_iterator.rb

@@ -0,0 +1,14 @@
+class FacetsIterator
+  delegate :select, :any?, to: :@facets
+
+  def initialize(facets)
+    @facets = facets
+    @facets_with_ga4_section = @facets.select(&:has_ga4_section?)
+  end
+
+  def each_with_index_and_count
+    @facets.each do |facet|
+      yield facet, @facets_with_ga4_section.index(facet), @facets_with_ga4_section.count
+    end
+  end
+end

app/models/date_facet.rb

@@ -45,6 +45,10 @@ def query_params
     { key => date_values }
   end
 
+  def ga4_section
+    name
+  end
+
 private
 
   def value_fragments

app/models/facet.rb

@@ -55,6 +55,14 @@ def query_params
     {}
   end
 
+  def ga4_section
+    nil
+  end
+
+  def has_ga4_section?
+    !ga4_section.nil?
+  end
+
 private
 
   def and_word_connectors

app/models/option_select_facet.rb

@@ -72,6 +72,10 @@ def closed_on_load_mobile?
     open_on_load?
   end
 
+  def ga4_section
+    name
+  end
+
 private
 
   def value_fragments

app/models/radio_facet.rb

@@ -30,6 +30,10 @@ def query_params
     { key => selected_value["value"] }
   end
 
+  def ga4_section
+    ""
+  end
+
 private
 
   def selected_value

app/models/radio_facet_for_multiple_filters.rb

@@ -37,6 +37,10 @@ def allowed_values
     @filter_hashes
   end
 
+  def ga4_section
+    ""
+  end
+
 private
 
   attr_reader :filter_hashes

app/models/taxon_facet.rb

@@ -43,6 +43,10 @@ def query_params
     }
   end
 
+  def ga4_section
+    "Topic"
+  end
+
 private
 
   def value_fragments

app/models/topical_facet.rb

@@ -6,4 +6,8 @@ def allowed_values
   def to_partial_path
     "option_select_facet"
   end
+
+  def ga4_section
+    name
+  end
 end

app/views/components/_date_filter.html.erb

@@ -6,9 +6,11 @@
   aria_controls_id ||= false
   date_errors_from ||= nil
   date_errors_to ||= nil
+  data_attributes ||= nil
+  button_data_attributes ||= nil
 %>
 <% if key && name %>
-  <%= render "components/expander", { title: name } do %>
+  <%= render "components/expander", { title: name, data_attributes:, button_data_attributes: } do %>
     <div class="govuk-!-margin-bottom-0" id="<%= key %>">
       <%= render "govuk_publishing_components/components/input", {
         label: {

app/views/components/_expander.html.erb

@@ -7,11 +7,15 @@
   content_id = "expander-content-#{SecureRandom.hex(4)}"
   shared_helper = GovukPublishingComponents::Presenters::SharedHelper.new(local_assigns)
 
-  css_classes = %w( app-c-expander )
-  css_classes << (shared_helper.get_margin_bottom) unless margin_bottom == 0
+  component_helper = GovukPublishingComponents::Presenters::ComponentWrapperHelper.new(local_assigns)
+  component_helper.add_data_attribute({ module: "expander" })
+  component_helper.add_data_attribute({ "open-on-load": open_on_load })
+  component_helper.add_class("app-c-expander")
+  component_helper.add_class(shared_helper.get_margin_bottom) unless margin_bottom == 0
+  component_helper.add_data_attribute({ "button-data-attributes": button_data_attributes }) if local_assigns.include?(:button_data_attributes)
 %>
 <% if title %>
-  <%= tag.div class: css_classes, data: { module: "expander", 'open-on-load': open_on_load, 'ga4-filter-parent': '' } do %>
+  <%= tag.div(**component_helper.all_attributes) do %>
     <h3 class="app-c-expander__heading">
       <span class="app-c-expander__title js-toggle"><%= title %></span>
       <svg version="1.1" viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" width="0" height="0" class="app-c-expander__icon app-c-expander__icon--up" aria-hidden="true" focusable="false"><path d="m798.16 609.84l-256-256c-16.683-16.683-43.691-16.683-60.331 0l-256 256c-16.683 16.683-16.683 43.691 0 60.331s43.691 16.683 60.331 0l225.84-225.84 225.84 225.84c16.683 16.683 43.691 16.683 60.331 0s16.683-43.691 0-60.331z"/></svg>

app/views/components/docs/expander.yml

@@ -28,3 +28,43 @@ examples:
       margin_bottom: 9
       block: |
         This is some content that is passed to the component. It should be distinct from the component, in that the component should not style or interact with it, other than to show and hide it.
+  with_counter:
+    description: If there are form elements within the expander it can display a count of the number of form elements with a selected or input value. This is to make it appear the same as the option select component when appearing with it in search pages. Note that if any form elements are selected on page load, the component will expand by default.
+    data:
+      title: Things
+      block: |
+        <div class="govuk-form-group gem-c-select">
+          <label class="govuk-label" for="level_one_taxon">Topic</label>
+          <select name="level_one_taxon" id="level_one_taxon" class="govuk-select gem-c-select__select--full-width">
+            <option value="">All topics</option>
+            <option value="1" selected>Business and industry</option>
+            <option value="2">COVID-19</option>
+            <option value="3">Corporate information</option>
+          </select>
+        </div>
+        <div class="govuk-form-group" data-ga4-section="Sub-topic">
+          <div class="govuk-form-group gem-c-select">
+            <label class="govuk-label" for="level_two_taxon">Sub-topic</label>
+            <select name="level_two_taxon" id="level_two_taxon" class="govuk-select gem-c-select__select--full-width">
+              <option value="">All sub-topics</option>
+              <option value="2">Business and the environment</option>
+              <option value="3">Business regulation</option>
+              <option value="4">Charities and social enterprises</option>
+            </select>
+          </div>
+        </div>
+        <div class="govuk-form-group">
+          <label for="public_timestamp[from]" class="gem-c-label govuk-label">Updated after</label>
+          <input aria-describedby="hint-fe643477" class="gem-c-input govuk-input" id="public_timestamp[from]" name="public_timestamp[from]" spellcheck="false" type="text" value="2023">
+        </div>
+  with_button_data_attributes:
+    description: Allows data attributes to be passed to the component to be added to the expand/collapse button. The attributes are written to the parent element then read by the JavaScript and applied to the button. This is used for tracking purposes.
+    data:
+      title: Organisation
+      button_data_attributes:
+        ga4_expandable: ""
+        ga4_event:
+          event_name: "select_content"
+          type: "finder"
+      block: |
+        Sssh I'm hiding

app/views/finders/_date_facet.html.erb

@@ -1,12 +1,21 @@
 <span data-ga4-change-category="update-filter text">
-  <%=
-  render "components/date_filter", {
+  <%= render "components/date_filter", {
     name: date_facet.name,
     key: date_facet.key,
     from_value: date_facet.user_supplied_from_date,
     to_value: date_facet.user_supplied_to_date,
     aria_controls_id: "js-search-results-info",
     date_errors_to: date_facet.error_message_to(@search_query),
-    date_errors_from: date_facet.error_message_from(@search_query)
+    date_errors_from: date_facet.error_message_from(@search_query),
+    data_attributes:  { "ga4-filter-parent": date_facet.ga4_section, "ga4-index": { index_section: index + 1, index_section_count: count } },
+    button_data_attributes: {
+      ga4_expandable: "",
+      ga4_event: {
+        event_name: 'select_content',
+        type: 'finder',
+        section: date_facet.name,
+        index: { index_section: index + 1, index_section_count: count }
+      }
+    }
   } %>
 </span>