module ActiveAdmin::ViewHelpers::DownloadFormatLinksHelper

def self.included base
  base.extend ClassMethods
end

def build_download_format_links(formats = self.class.formats)
  params = request.query_parameters.except :format, :commit
  div class: "download_links" do
    span I18n.t('active_admin.download')
    formats.each do |format|
      a format.upcase, href: url_for(params: params, format: format)
    end
  end
end

def build_download_formats(download_links)
  download_links = instance_exec(&download_links) if download_links.is_a?(Proc)
  if download_links.is_a?(Array) && !download_links.empty?
    download_links
  elsif download_links == false
    []
  else
    self.class.formats
  end
end