module RouteTranslator::Host

def locale_from_host(host)
  locales = RouteTranslator.config.host_locales.each_with_object([]) do |(pattern, locale), result|
    result << locale.to_sym if host =~ regex_for(pattern)
  end
  locales &= I18n.available_locales
  (locales.first || I18n.default_locale).to_sym
end

def native_locale?(locale)
  locale.to_s.match(/native_/).present?
end

def native_locales
  config.host_locales.values.map { |locale| :"native_#{locale}" }
end

def regex_for(host_string)
  escaped = Regexp.escape(host_string).gsub('\*', '.*?').gsub('\.', '\.?')
  Regexp.new("^#{escaped}$", Regexp::IGNORECASE)
end