module OAuth
  class Consumer

    if RUBY_VERSION >= "2.0.0"

      # we got Module#prepend, let's use it
      module ClientCertificateExtensions
        def http
          super.tap do |http|
            http.cert = options[:ssl_client_cert]
            http.key  = options[:ssl_client_key]
          end
        end
      end

      prepend ClientCertificateExtensions

    else
      def http_with_ssl_client_certificates(*args)
        @http ||= http_without_ssl_client_certificates(*args).tap do |http|
          http.cert = options[:ssl_client_cert]
          http.key  = options[:ssl_client_key]
        end
      end

      alias_method_chain :http, :ssl_client_certificates
    end

  end
end