Add rake task for converting whn to markdown

lib/tasks/populate_what_happens_next.rake

@@ -0,0 +1,50 @@
+namespace :what_happens_next_markdown do
+  include ActionView::Helpers::TextHelper
+
+  def generate_markdown(text)
+    formatted_html = simple_format(
+      text,
+      {},
+      sanitize: true,
+      sanitize_options: {
+        tags: %w[a ol ul li p],
+        attributes: %w[href class rel target title],
+      },
+    )
+    ReverseMarkdown.convert(formatted_html).strip
+  end
+
+  desc "Populate what_happens_next_markdown"
+  task populate: :environment do |_, _args|
+    Form.find_each do |form|
+      markdown = generate_markdown(form.what_happens_next_text)
+      form.what_happens_next_markdown = form.what_happens_next_text.blank? ? "" : markdown
+
+      form.made_live_forms.each do |made_live_form|
+        form_blob = JSON.parse(made_live_form.json_form_blob, symbolize_names: true)
+        markdown = generate_markdown(form_blob[:what_happens_next_text])
+        form_blob[:what_happens_next_markdown] = form_blob[:what_happens_next_text].blank? ? "" : markdown
+
+        made_live_form.update!(json_form_blob: form_blob.to_json)
+      end
+
+      form.save!
+    end
+  end
+
+  desc "depopulate what_happens_next_markdown"
+  task depopulate: :environment do |_, _args|
+    Form.find_each do |form|
+      form.what_happens_next_markdown = nil
+
+      form.made_live_forms.each do |made_live_form|
+        form_blob = JSON.parse(made_live_form.json_form_blob, symbolize_names: true)
+        form_blob[:what_happens_next_markdown] = nil
+
+        made_live_form.update!(json_form_blob: form_blob.to_json)
+      end
+
+      form.save!
+    end
+  end
+end