class RuboCop::RemoteConfig

def cache_name_from_uri
  uri = @uri.clone
  uri.query = nil
  uri.to_s.gsub!(/[^0-9A-Za-z]/, '-')
end

def cache_path
  File.expand_path(".rubocop-#{cache_name_from_uri}", @base_dir)
end

def cache_path_exists?
  @cache_path_exists ||= File.exist?(cache_path)
end

def cache_path_expired?
  return true unless cache_path_exists?
  @cache_path_expired ||= begin
    file_age = (Time.now - File.stat(cache_path).mtime).to_f
    (file_age / CACHE_LIFETIME) > 1
  end
end

def file
  return cache_path unless cache_path_expired?
  http = Net::HTTP.new(@uri.hostname, @uri.port)
  http.use_ssl = true if @uri.instance_of? URI::HTTPS
  request = Net::HTTP::Get.new(@uri.request_uri)
  if cache_path_exists?
    request['If-Modified-Since'] = File.stat(cache_path).mtime.rfc2822
  end
  response = http.request(request)
  cache_path.tap do |f|
    if response.is_a?(Net::HTTPSuccess)
      open f, 'w' do |io|
        io.write response.body
      end
    end
  end
end

def initialize(url, base_dir)
  @uri = URI.parse(url)
  @base_dir = base_dir
end