Add TakePartController

- add view and helpers
- convert test suite to RSpec on move
- note that we explicitly remove the content-bottom-margin div
  class that was immediately inside the 2/3rds column. This is
  a style used in a handful of government-frontend document
  types which (on review with frontend developers) does not
  really fix the problem it's trying to fix (insufficient bottom
  margin on some tablet-sized devices). This has been captured
  as alphagov/govuk_publishing_components#4220
  to be fixed properly in the components gem.

Commit audit trail:
- app/views/take_part/show.html.erb alphagov/government-frontend@e858440
- app/helpers/machine_readable_metadata_helper.rb alphagov/government-frontend@5fb924e
- app/helpers/title_helper.rb alphagov/government-frontend@08db76d
- spec/system/take_part_spec.rb alphagov/government-frontend@6ecd50c

FIX - remove unnecessary div

app/controllers/take_part_controller.rb

@@ -0,0 +1,5 @@
+class TakePartController < ContentItemsController
+  def content_item_slug
+    request.path
+  end
+end

app/helpers/machine_readable_metadata_helper.rb

@@ -0,0 +1,6 @@
+module MachineReadableMetadataHelper
+  def machine_readable_metadata(content_item, args)
+    locals = { content_item: content_item.to_h }.merge(args)
+    render("govuk_publishing_components/components/machine_readable_metadata", locals)
+  end
+end

app/helpers/title_helper.rb

@@ -0,0 +1,10 @@
+module TitleHelper
+  def title_and_context(title, document_type)
+    {
+      title:,
+      context: I18n.t("content_item.schema_name.#{document_type}", count: 1),
+      context_locale: t_locale_fallback("content_item.schema_name.#{document_type}", count: 1),
+      average_title_length: "long",
+    }
+  end
+end

app/views/take_part/show.html.erb

@@ -0,0 +1,35 @@
+<% content_for :title do %>
+  <%= @content_item.title %> - GOV.UK
+<% end %>
+
+<% content_for :extra_head_content do %>
+  <%= machine_readable_metadata(@content_item, schema: :article) %>
+<% end %>
+
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds">
+    <%= render 'govuk_publishing_components/components/title', title_and_context(@content_item.title, @content_item.document_type).except(:average_title_length) %>
+    <%= render 'govuk_publishing_components/components/lead_paragraph', text: @content_item.description %>
+  </div>
+
+  <%= render 'shared/translations' %>
+</div>
+
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds">
+    <%= render 'components/figure',
+    src: @content_item.image["url"],
+    alt: @content_item.image["alt_text"],
+    credit: @content_item.image["credit"],
+    caption: @content_item.image["caption"] if @content_item.image %>
+
+    <%= render "govuk_publishing_components/components/govspeak", {
+      direction: page_text_direction
+    } do %>
+    <%= raw(@content_item.body) %>
+    <% end %>
+  </div>
+  <%= render 'shared/sidebar_navigation' %>
+</div>
+
+<%= render 'shared/footer_navigation' %>

config/routes.rb

@@ -98,7 +98,12 @@
 
   get "/media/:id/:filename/preview", to: "csv_preview#show", filename: /[^\/]+/
 
-  get "/government/placeholder", to: "placeholder#show"
+  scope "/government" do
+    get "/placeholder", to: "placeholder#show"
+    scope "/get-involved" do
+      get "/take-part/:slug", to: "take_part#show"
+    end
+  end
 
   # route API errors to the error handler
   constraints ApiErrorRoutingConstraint.new do

spec/system/take_part_spec.rb

@@ -0,0 +1,24 @@
+RSpec.describe "TakePart" do
+  before do
+    content_store_has_example_item("/government/get-involved/take-part/tp1", schema: :take_part)
+  end
+
+  context "/government/get-involved/take-part/:slug" do
+    it "displays the take_part page" do
+      visit "/government/get-involved/take-part/tp1"
+
+      expect(page).to have_title("Become a councillor - GOV.UK")
+
+      expect(page).to have_css("h1", text: "Become a councillor")
+      expect(page).to have_text("All councils are led by democratically elected councillors who set the vision and direction, and represent their local community.")
+
+      assert page.has_text?("There are roughly 20,000 local councillors in England. Councillors are elected to the local council to represent their own local community, so they must either live or work in the area.")
+    end
+
+    it "does not display a single page notification button" do
+      visit "/government/get-involved/take-part/tp1"
+
+      expect(page).not_to have_css(".gem-c-single-page-notification-button")
+    end
+  end
+end