module DetailParser

# File lib/detail_parser.rb, line 71
def attach_to_action_controller
  DetailParser::LogSubscriber.attach_to :action_controller
end

# File lib/detail_parser.rb, line 34
def before_format(data, payload)
  result = nil
  result = @@before_format.call(data, payload) if @@before_format
  result || data
end

# File lib/detail_parser.rb, line 75
def detail_config
  application.config.detail_parser
end

# File lib/detail_parser.rb, line 45
def keep_original_log
  return if detail_config.keep_original_log
  remove_existing_log_subscriptions
end

# File lib/detail_parser.rb, line 50
def remove_existing_log_subscriptions
  ActiveSupport::LogSubscriber.log_subscribers.each do |subscriber|
    case subscriber
    when ActionController::LogSubscriber
      unsubscribe(:action_controller, subscriber)
    end
  end
end

# File lib/detail_parser.rb, line 41
def set_formatter
  DetailParser.formatter = detail_config.formatter || DetailParser::Formatters::Json.new
end

# File lib/detail_parser.rb, line 20
def setup(app)
  self.application = app
  keep_original_log

  attach_to_action_controller
  set_formatter
end

# File lib/detail_parser.rb, line 60
def unsubscribe(component, subscriber)
  events = subscriber.public_methods(false).reject { |method| method.to_s == 'call' }
  events.each do |event|
    ActiveSupport::Notifications.notifier.listeners_for("#{event}.#{component}").each do |listener|
      if listener.instance_variable_get('@delegate') == subscriber
        ActiveSupport::Notifications.unsubscribe listener
      end
    end
  end
end