Add CSV download of From content

app/controllers/forms/welsh_translation_controller.rb

@@ -58,6 +58,16 @@ def render_preview
       render json: { preview_html:, errors: [] }.to_json
     end
 
+    def download
+      authorize current_form, :can_edit_form?
+
+      form_content_service = WelshCsvService.new(form_with_pages_and_conditions)
+
+      send_data form_content_service.as_csv,
+                type: "text/csv; charset=iso-8859-1",
+                disposition: "attachment; filename=#{form_content_service.filename}"
+    end
+
   private
 
     def preview_html

app/services/welsh_csv_service.rb

@@ -0,0 +1,126 @@
+class WelshCsvService
+  MAX_FILENAME_LENGTH = 80
+  FILENAME_SEPARATOR = "_".freeze
+
+  attr_reader :form
+
+  def initialize(form)
+    @form = form
+  end
+
+  def as_csv
+    CSV.generate do |csv|
+      add_header(csv)
+      add_form_name(csv)
+      add_page_content(csv)
+      add_form_metadata(csv)
+    end
+  end
+
+  def filename
+    extension = ".csv"
+    safe_form_name = form.name
+      .parameterize(separator: FILENAME_SEPARATOR)
+      .truncate(MAX_FILENAME_LENGTH - extension.length, separator: FILENAME_SEPARATOR, omission: "")
+
+    "#{safe_form_name}#{extension}"
+  end
+
+private
+
+  def add_header(csv)
+    csv << ["", "English content", "Welsh content"]
+  end
+
+  def add_form_name(csv)
+    csv << ["Form name", form.name, form.name_cy]
+  end
+
+  def add_page_content(csv)
+    form.pages.each do |page|
+      add_question_content(csv, page)
+      add_selection_options(csv, page) if page.answer_type == "selection"
+      add_none_of_above_question(csv, page) if has_none_of_the_above?(page)
+      add_routing_conditions(csv, page)
+      add_page_heading(csv, page)
+      add_guidance_text(csv, page)
+    end
+  end
+
+  def add_question_content(csv, page)
+    csv << ["#{question_name(page)} - question text", page.question_text, page.question_text_cy]
+    if page.hint_text.present?
+      csv << ["#{question_name(page)} - hint text", page.hint_text, page.hint_text_cy]
+    end
+  end
+
+  def add_selection_options(csv, page)
+    page.answer_settings.selection_options.each_with_index do |option, index|
+      welsh_option_name = page.answer_settings_cy&.selection_options&.dig(index)&.name || ""
+      csv << ["#{question_name(page)} - option #{index + 1}", option.name, welsh_option_name]
+    end
+  end
+
+  def add_none_of_above_question(csv, page)
+    english_question = page.answer_settings.none_of_the_above_question.question_text
+    welsh_question = page.answer_settings_cy&.none_of_the_above_question&.question_text || ""
+
+    csv << [
+      "#{question_name(page)} - question or label if ‘None of the above’ is selected",
+      english_question,
+      welsh_question,
+    ]
+  end
+
+  def has_none_of_the_above?(page)
+    page.answer_type == "selection" &&
+      page.answer_settings.none_of_the_above_question.present?
+  end
+
+  def add_routing_conditions(csv, page)
+    page.routing_conditions.each do |condition|
+      if condition.is_exit_page?
+        csv << ["#{question_name(page)} - exit page heading", condition.exit_page_heading, condition.exit_page_heading_cy]
+        csv << ["#{question_name(page)} - exit page content", condition.exit_page_markdown, condition.exit_page_markdown_cy]
+      end
+    end
+  end
+
+  def add_page_heading(csv, page)
+    if page.page_heading.present?
+      csv << ["#{question_name(page)} - page heading", page.page_heading, page.page_heading_cy]
+    end
+  end
+
+  def add_guidance_text(csv, page)
+    if page.guidance_markdown.present?
+      csv << ["#{question_name(page)} - guidance text", page.guidance_markdown, page.guidance_markdown_cy]
+    end
+  end
+
+  def question_name(page)
+    "Question #{page.position}"
+  end
+
+  def add_form_metadata(csv)
+    add_field_if_present(csv, "Declaration", form.declaration_text, form.declaration_text_cy)
+    add_field_if_present(csv, "Information about what happens next", form.what_happens_next_markdown, form.what_happens_next_markdown_cy)
+    add_field_if_present(csv, "GOV⁠.⁠UK Pay payment link", form.payment_url, form.payment_url_cy)
+    add_field_if_present(csv, "Link to privacy information for this form", form.privacy_policy_url, form.privacy_policy_url_cy)
+
+    add_support_details(csv)
+  end
+
+  def add_support_details(csv)
+    add_field_if_present(csv, "Contact details for support - email address", form.support_email, form.support_email_cy)
+    add_field_if_present(csv, "Contact details for support - phone number and opening times", form.support_phone, form.support_phone_cy)
+    add_field_if_present(csv, "Contact details for support - online contact link", form.support_url, form.support_url_cy)
+    add_field_if_present(csv, "Contact details for support - online contact link text", form.support_url_text, form.support_url_text_cy)
+  end
+
+  def add_field_if_present(csv, label, english_value, welsh_value)
+    if english_value.present?
+      csv << [label, english_value, welsh_value || ""]
+    end
+  end
+end

app/views/forms/welsh_translation/new.html.erb

@@ -13,9 +13,10 @@
         <%= t("page_titles.welsh_translation") %>
       </h1>
 
-      <p>
+      <div class="govuk-button-group">
+        <%= govuk_button_link_to t(".csv_download"), welsh_translation_download_path(@welsh_translation_input.form), secondary: true %>
         <%= render PreviewLinkComponent::View.new(@welsh_translation_input.form.pages, preview_link(@welsh_translation_input.form, locale: :cy), t(".preview_link_text")) %>
-      </p>
+      </div>
     </div>
   </div>
 

config/locales/en.yml

@@ -560,6 +560,7 @@ en:
       new:
         condition:
           heading: Question %{question_number}’s exit page
+        csv_download: Download content as CSV
         delete_welsh_version: Delete Welsh version
         english_header: English content
         exit_page_heading: Exit page heading

config/routes.rb

@@ -72,6 +72,7 @@
     get "/welsh-translation/delete" => "forms/welsh_translation#delete", as: :welsh_translation_delete
     delete "/welsh-translation/delete" => "forms/welsh_translation#destroy", as: :welsh_translation_destroy
     post "/welsh-translation-preview" => "forms/welsh_translation#render_preview", as: :welsh_translation_render_preview
+    get "/welsh-translation-download" => "forms/welsh_translation#download", as: :welsh_translation_download
     get "/submission-attachments" => "forms/submission_attachments#new", as: :submission_attachments
     post "/submission-attachments" => "forms/submission_attachments#create", as: :submission_attachments_create
     get "/daily-submission-csv" => "forms/daily_submission_batch#new", as: :daily_submission_batch

spec/requests/forms/welsh_translation_controller_spec.rb

@@ -273,4 +273,33 @@
       end
     end
   end
+
+  describe "#download" do
+    let(:form) { create(:form, :with_welsh_translation, name: "A form with Welsh") }
+
+    before do
+      get welsh_translation_download_path(id)
+    end
+
+    context "when the user is not authorized" do
+      let(:current_user) { build :user }
+
+      it "returns 403" do
+        expect(response).to have_http_status(:forbidden)
+      end
+    end
+
+    it "downloads a CSV file" do
+      expect(response).to have_http_status(:ok)
+      expect(response.headers["content-type"]).to eq "text/csv; charset=iso-8859-1"
+      expect(response.headers["content-disposition"]).to match("attachment; filename=a_form_with_welsh.csv")
+    end
+
+    it "returns a CSV with a header row and and content" do
+      csv = CSV.parse(response.body)
+
+      expect(csv.first).to eq(["", "English content", "Welsh content"])
+      expect(csv.second).to eq(["Form name", "A form with Welsh", "Welsh A form with Welsh"])
+    end
+  end
 end