class SiteController < ApplicationController

  def index
    language = parse_accept_language(request.env['HTTP_ACCEPT_LANGUAGE'])
    render plain: "Language preference: #{language}"

  end


private

  def parse_accept_language(header)
    header.to_s.split(',').map { |l|
      lang, q_factor = l.split(';q=')
      [lang, (q_factor || '1').to_f]
    }.sort_by { |_, q| -q }.map(&:first).first
  end

end