module Xing
  module Static
    class BackendUrlCookie
      def initialize(app, backend_url)
        @backend_url = backend_url
        @app = app
      end

      def call(env)
        status, headers, body = @app.call(env)
        headers["Set-Cookie"] = [
          (headers["Set-Cookie"]),
          "lrdBackendUrl=#@backend_url",
          "xingBackendUrl=#{@backend_url}"
        ].compact.join("\n") unless @backend_url.nil?
        [ status, headers, body ]
      end
    end
  end
end