source_url_presenter.rb

class SourceUrlPresenter
  include Callable

  def initialize(url, utm_source:, utm_content:)
    @url = url
    @utm_source = utm_source
    @utm_content = utm_content
  end

  def call
    url_for_brexit_checker_results if is_a_brexit_checker_list?
  end

private

  attr_reader :url, :utm_source, :utm_content

  def url_for_brexit_checker_results
    absolute_url = PublicUrls.url_for(
      base_path: url,
      utm_source: utm_source,
      utm_content: utm_content,
    )

    "[You can view a copy of your results on GOV.UK](#{absolute_url})"
  end

  def is_a_brexit_checker_list?
    url =~ %r{transition-check/results} ||
      url =~ %r{get-ready-brexit-check/results}
  end
end