Add structured data via the new component

This uses the new component built in
alphagov/govuk_publishing_components#318.

https://trello.com/c/RLQI1IUV

app/presenters/news_article_presenter.rb

@@ -10,8 +10,4 @@ class NewsArticlePresenter < ContentItemPresenter
   def image
     content_item["details"]["image"]
   end
-
-  def structured_data
-    NewsArticleStructured.new(self).structured_data
-  end
 end

app/views/content_items/answer.html.erb

@@ -1 +1,7 @@
+<% content_for :extra_head_content do %>
+  <%= render 'govuk_publishing_components/components/machine_readable_metadata',
+    schema: :article,
+    content_item: @content_item.content_item %>
+<% end %>
+
 <%= render 'content_items/body_with_related_links' %>

app/views/content_items/guide.html.erb

@@ -1,3 +1,10 @@
+<% content_for :extra_head_content do %>
+  <%= render 'govuk_publishing_components/components/machine_readable_metadata',
+    schema: :article,
+    content_item: @content_item.content_item,
+    canonical_url: @content_item.canonical_url %>
+<% end %>
+
 <% content_for :simple_header, true %>
 <div class="grid-row">
   <div class="column-two-thirds">

app/views/content_items/news_article.html.erb

@@ -1,6 +1,8 @@
-<script type="application/ld+json">
-  <%= @content_item.structured_data.to_json.html_safe %>
-</script>
+<% content_for :extra_head_content do %>
+  <%= render 'govuk_publishing_components/components/machine_readable_metadata',
+    schema: :news_article,
+    content_item: @content_item.content_item %>
+<% end %>
 
 <div class="grid-row">
   <div class="column-two-thirds">

app/views/content_items/travel_advice.html.erb

@@ -1,9 +1,17 @@
-<%
-  content_for :simple_header, true
-  content_for :extra_head_content do %>
+<% content_for :simple_header, true %>
+
+<% content_for :extra_head_content do %>
   <%= auto_discovery_link_tag :atom, @content_item.feed_link,
     title: "Recent updates for #{@content_item.country_name}" %>
+
+  <%= render 'govuk_publishing_components/components/machine_readable_metadata',
+    schema: :article,
+    content_item: @content_item.content_item,
+    canonical_url: @content_item.canonical_url,
+    title: @content_item.page_title,
+    body: @content_item.current_part_body %>
 <% end %>
+
 <div class="grid-row">
   <div class="column-two-thirds">
     <%= render 'govuk_component/title', @content_item.title_and_context %>

test/presenters/news_article_presenter_test.rb

@@ -45,22 +45,6 @@ class PresentedNewsArticleTest < NewsArticlePresenterTestCase
     test 'presents the locale' do
       assert_equal schema_item['locale'], presented_item.locale
     end
-
-    test 'has no structured data if no publishing org' do
-      expected = {}
-      assert_equal expected, presented_item.structured_data
-    end
-
-    test 'has structured data' do
-      item = { "links" => { "primary_publishing_organisation" => [{ "title" => "Ministry of Magic", "base_path" => "/government/organisations/magic" }] } }
-
-      structured_data = presented_item("news_article", item).structured_data
-
-      assert_equal "https://www.test.gov.uk/government/news/christmas-2016-prime-ministers-message", structured_data["mainEntityOfPage"]["@id"]
-      assert_equal "2016-12-25T00:15:02.000+00:00", structured_data["datePublished"]
-      assert_equal "Ministry of Magic", structured_data["author"]["name"]
-      assert_equal "https://www.test.gov.uk/government/organisations/magic", structured_data["author"]["url"]
-    end
   end
 
   class HistoryModePresentedNewsArticle < NewsArticlePresenterTestCase