class ActionController::LogSubscriber

def halted_callback(event)
  info("Filter chain halted as #{event.payload[:filter]} rendered or redirected")
end

def logger
  ActionController::Base.logger
end

def process_action(event)
  return unless logger.info?
  payload   = event.payload
  additions = ActionController::Base.log_process_action(payload)
  status = payload[:status]
  if status.nil? && payload[:exception].present?
    exception_class_name = payload[:exception].first
    status = ActionDispatch::ExceptionWrapper.status_code_for_exception(exception_class_name)
  end
  message = "Completed #{status} #{Rack::Utils::HTTP_STATUS_CODES[status]} in #{event.duration.round}ms"
  message << " (#{additions.join(" | ")})" unless additions.blank?
  info(message)
end

def redirect_to(event)
  info("Redirected to #{event.payload[:location]}")
end

def send_data(event)
  info("Sent data #{event.payload[:filename]} (#{event.duration.round(1)}ms)")
end

def send_file(event)
  info("Sent file #{event.payload[:path]} (#{event.duration.round(1)}ms)")
end

def start_processing(event)
  return unless logger.info?
  payload = event.payload
  params  = payload[:params].except(*INTERNAL_PARAMS)
  format  = payload[:format]
  format  = format.to_s.upcase if format.is_a?(Symbol)
  info "Processing by #{payload[:controller]}##{payload[:action]} as #{format}"
  info "  Parameters: #{params.inspect}" unless params.empty?
end

def unpermitted_parameters(event)
  unpermitted_keys = event.payload[:keys]
  debug("Unpermitted parameters: #{unpermitted_keys.join(", ")}")
end