class Appsignal::Grape::Middleware

def call(env)
  if Appsignal.active?
    call_with_appsignal_monitoring(env)
  else
    app.call(env)
  end
end

def call_with_appsignal_monitoring(env)
  request     = ::Rack::Request.new(env)
  transaction = Appsignal::Transaction.create(
    SecureRandom.uuid,
    Appsignal::Transaction::HTTP_REQUEST,
    request
  )
  begin
    app.call(env)
  rescue Exception => error # rubocop:disable Lint/RescueException
    transaction.set_error(error)
    raise error
  ensure
    request_method = request.request_method.to_s.upcase
    path = request.path # Path without namespaces
    endpoint = env["api.endpoint"]
    if endpoint && endpoint.options
      options = endpoint.options
      request_method = options[:method].first.to_s.upcase
      klass = options[:for]
      namespace = endpoint.namespace
      namespace = "" if namespace == "/"
      path = options[:path].first.to_s
      path = "/#{path}" if path[0] != "/"
      path = "#{namespace}#{path}"
      transaction.set_action_if_nil("#{request_method}::#{klass}##{path}")
    end
    transaction.set_http_or_background_queue_start
    transaction.set_metadata("path", path)
    transaction.set_metadata("method", request_method)
    Appsignal::Transaction.complete_current!
  end
end