WIP add hide_from_search_engines method

- relies upon publication presenter

Author: andysellick

app/presenters/html_publication_presenter.rb

@@ -1,2 +1,5 @@
 class HtmlPublicationPresenter < ContentItemPresenter
+  def hide_from_search_engines?
+    PublicationPresenter::PATHS_TO_HIDE.any? { |path| content_item.base_path.start_with?(path) }
+  end
 end

app/views/html_publication/show.html.erb

@@ -6,7 +6,7 @@
     content_item: content_item.to_h
   %>
 
-  <% if content_item.hide_from_search_engines? %>
+  <% if @presenter.hide_from_search_engines? %>
     <meta name="robots" content="noindex">
   <% end %>
 <% end %>

spec/presenter/html_publication_presenter_spec.rb

@@ -1,2 +1,23 @@
 RSpec.describe HtmlPublicationPresenter do
+  subject(:html_publication_presenter) { described_class.new(HtmlPublication.new(content_store_response)) }
+
+  let(:content_store_response) { GovukSchemas::Example.find("html_publication", example_name: "long_form_and_automatically_numbered_headings") }
+
+  describe "#hide_from_search_engines?" do
+    it "returns false" do
+      expect(html_publication_presenter.hide_from_search_engines?).to be false
+    end
+
+    context "when the page is in the hide list" do
+      let(:content_store_response) do
+        GovukSchemas::Example.find("html_publication", example_name: "long_form_and_automatically_numbered_headings").merge({
+          "base_path" => "/government/publications/govuk-app-testing-privacy-notice-how-we-use-your-data",
+        })
+      end
+
+      it "returns true" do
+        expect(html_publication_presenter.hide_from_search_engines?).to be true
+      end
+    end
+  end
 end