Render a guide as a single page

app/controllers/content_items_controller.rb

@@ -83,6 +83,8 @@ def format_banner_links(links, type)
   end
 
   def content_item_template
+    return "guide_single" if @content_item.render_guide_as_single_page?
+
     @content_item.schema_name
   end
 

app/presenters/content_item/parts.rb

@@ -61,7 +61,9 @@ def previous_and_next_navigation
 
     def part_link_elements
       parts.map do |part|
-        if part["slug"] != current_part["slug"]
+        if render_guide_as_single_page?
+          { href: "##{part['slug']}", text: part["title"] }
+        elsif part["slug"] != current_part["slug"]
           { href: part["full_path"], text: part["title"] }
         else
           { href: part["full_path"], text: part["title"], active: true }

app/presenters/content_item_presenter.rb

@@ -78,6 +78,11 @@ def cache_control_public?
     !content_item.cache_control.private?
   end
 
+  def render_guide_as_single_page?
+    # /voting-in-the-uk
+    content_id == "9315bc67-33e7-42e9-8dea-e022f56dabfa"
+  end
+
 private
 
   def display_date(timestamp, format = "%-d %B %Y")

app/views/content_items/guide_single.html.erb

@@ -0,0 +1,51 @@
+<% content_for :extra_head_content do %>
+  <%= machine_readable_metadata(
+    schema: :article,
+    canonical_url: @content_item.canonical_url,
+    body: @content_item.current_part_body
+  ) %>
+<% end %>
+
+<script type="application/ld+json">
+  <%= raw MachineReadable::GuideFaqPageSchemaPresenter.new(@content_item).structured_data.to_json %>
+</script>
+
+<% content_for :simple_header, true %>
+
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds">
+    <%= render 'govuk_publishing_components/components/title', { title: @content_item.content_title } %>
+
+    <% if @content_item.show_guide_navigation? %>
+      <aside class="part-navigation-container" role="complementary">
+        <%= render "govuk_publishing_components/components/contents_list", aria_label: 'Pages in this guide', contents: @content_item.part_link_elements, underline_links: true %>
+      </aside>
+    <% end %>
+  </div>
+
+  <div class="govuk-grid-column-two-thirds">
+    <% if @content_item.has_parts? %>
+
+      <% @content_item.parts.each_with_index do |part, index| %>
+      <section class="govuk-!-padding-bottom-9" aria-labelledby="<%= part["slug"] %>">
+        <%= render "govuk_publishing_components/components/heading", {
+            text: part["title"],
+            id: part["slug"],
+            heading_level: 1,
+            border_top: index.zero? ? 0 : 2,
+            padding: true
+          } %>
+
+        <%= render 'govuk_publishing_components/components/govspeak',
+          content: part["body"].html_safe,
+          direction: page_text_direction,
+          disable_youtube_expansions: true %>
+      </section>
+      <% end %>
+    <% end %>
+  </div>
+
+  <%= render 'shared/sidebar_navigation' %>
+</div>
+
+<%= render 'shared/footer_navigation' %>

config/routes.rb

@@ -11,6 +11,9 @@
 
   get "healthcheck", to: proc { [200, {}, [""]] }
 
+  # Testing guides as a single page so we redirect parts to the default page
+  get "/voting-in-the-uk/:chapter", to: redirect("/voting-in-the-uk#%{chapter}")
+
   get "*path/:variant" => "content_items#show",
       constraints: {
         variant: /print/,