Add helper to render Markdown content pages

Gemfile

@@ -19,6 +19,8 @@ gem "bootsnap", ">= 1.4.4", require: false
 gem "govuk-components"
 # GOV UK component form builder DSL
 gem "govuk_design_system_formbuilder"
+# Convert Markdown into GOV.UK frontend-styled HTML
+gem "govuk_markdown"
 # GOV UK Notify
 gem "notifications-ruby-client"
 # Turbo and Stimulus

Gemfile.lock

@@ -181,6 +181,9 @@ GEM
       activemodel (>= 6.1)
       activesupport (>= 6.1)
       deep_merge (~> 1.2.1)
+    govuk_markdown (1.0.0)
+      activesupport
+      redcarpet
     has_scope (0.8.0)
       actionpack (>= 5.2)
       activesupport (>= 5.2)
@@ -328,6 +331,7 @@ GEM
     rb-fsevent (0.11.1)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
+    redcarpet (3.5.1)
     redis (4.6.0)
     regexp_parser (2.2.1)
     request_store (1.5.1)
@@ -476,6 +480,7 @@ DEPENDENCIES
   factory_bot_rails
   govuk-components
   govuk_design_system_formbuilder
+  govuk_markdown
   hotwire-rails
   json-schema
   listen (~> 3.3)

app/controllers/content_controller.rb

@@ -0,0 +1,11 @@
+class ContentController < ApplicationController
+  include ContentHelper
+
+  def accessibility_statement
+    render_content_page :accessibility_statement
+  end
+
+  def privacy_notice
+    render_content_page :privacy_notice, page_title: "Privacy notice for tenants and buyers of new social housing"
+  end
+end

app/helpers/content_helper.rb

@@ -0,0 +1,14 @@
+module ContentHelper
+  def render_content_page(page_name, page_title: nil, locals: {})
+    raw_content = File.read("app/views/content/#{page_name}.md")
+    content_with_erb_tags_replaced = ApplicationController.renderer.render(
+      inline: raw_content,
+      locals: locals
+    )
+
+    @page_title = page_title || page_name.to_s.humanize
+    @page_content = GovukMarkdown.render(content_with_erb_tags_replaced).html_safe
+
+    render "content/page"
+  end
+end

app/views/content/page.html.erb

@@ -0,0 +1,9 @@
+<%= content_for :title, @page_title %>
+
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds-from-desktop">
+    <h1 class="govuk-heading-xl"><%= @page_title %></h1>
+
+    <%= @page_content %>
+  </div>
+</div>

config/routes.rb

@@ -33,6 +33,10 @@ Rails.application.routes.draw do
 
   root to: "start#index"
 
+  # Content pages
+  get "/accessibility-statement", to: "content#accessibility_statement"
+  get "/privacy-notice", to: "content#privacy_notice"
+
   resources :users do
     member do
       get "password/edit", to: "users#edit_password"

spec/helpers/content_helper_spec.rb

@@ -0,0 +1,13 @@
+require "rails_helper"
+
+RSpec.describe ContentHelper do
+  let(:page_name) { "privacy_notice" }
+
+  describe "render content page" do
+    it "returns the page" do
+      expected_html = "Privacy notice"
+      expect(render_content_page(page_name)).to match(expected_html)
+      expect(page).to have_title("Privacy notice")
+    end
+  end
+end