Separate UA ecommerce enabler from GA4 ecommerce enabler

The UA ecommerce tracking is disabled on three pages, as the object sent to UA exceeds the payload and was causing a JS error. Therefore UA ecommerce tracking was disabled on these pages in #2286. However we would like these pages enabled for GA4 ecommerce tracking while keeping the UA tracking disabled. Therefore, they have been separated out.

PR Change: remove include_ga4_ecommerce_tracking variable

app/presenters/search_result_presenter.rb

@@ -27,7 +27,7 @@ def document_list_component_data
         text: title,
         path: link,
         description: sanitize(summary_text),
-        data_attributes: ecommerce_data(link, title),
+        data_attributes: ga4_ecommerce_data(link).merge(ecommerce_data(link, title)),
       },
       metadata: structure_metadata,
       metadata_raw: metadata,
@@ -80,23 +80,29 @@ def structure_parts
         GovukError.notify(MalformedPartError.new, extra: { part:, link: })
         next
       end
+      path = "#{link}/#{part[:slug]}"
       {
         link: {
           text: part[:title],
-          path: "#{link}/#{part[:slug]}",
+          path:,
           description: part[:body],
-          data_attributes: ecommerce_data("#{link}/#{part[:slug]}", part[:title], part_index: index),
+          data_attributes: ga4_ecommerce_data(path).merge(ecommerce_data(path, part[:title], part_index: index)),
         },
       }
     end
     structured_parts.compact
   end
 
+  def ga4_ecommerce_data(path)
+    {
+      ga4_ecommerce_path: path,
+    }
+  end
+
   def ecommerce_data(link, title, part_index: nil)
     return {} unless @include_ecommerce
 
     {
-      ga4_ecommerce_path: link,
       ecommerce_path: link,
       ecommerce_row: 1,
       ecommerce_index: document.index,

spec/presenters/result_set_presenter_spec.rb

@@ -183,7 +183,7 @@
       end
     end
 
-    context "with ecommerce disabled" do
+    context "with universal analytics ecommerce disabled" do
       let(:enable_ecommerce) { false }
       let(:results) do
         [FactoryBot.build(
@@ -195,13 +195,15 @@
         )]
       end
 
-      it "doesn't include ecommerce attributes" do
+      it "doesn't include UA ecommerce attributes" do
         expected_hash = {
           link: {
             text: "document_title",
             path: "/path/to/doc",
             description: "document_description",
-            data_attributes: {},
+            data_attributes: {
+              ga4_ecommerce_path: "/path/to/doc",
+            },
           },
           metadata: {
             "Organisations" => "Organisations: Department for Work and Pensions",