class Rails::Rack::Logger

def call(env)
  request = ActionDispatch::Request.new(env)
  if Rails.logger.respond_to?(:tagged)
    Rails.logger.tagged(compute_tags(request)) { call_app(request, env) }
  else
    call_app(request, env)
  end
end

def call_app(request, env)
  # Put some space between requests in development logs.
  if Rails.env.development?
    Rails.logger.info ''
    Rails.logger.info ''
  end
  Rails.logger.info started_request_message(request)
  @app.call(env)
ensure
  ActiveSupport::LogSubscriber.flush_all!
end

def compute_tags(request)
  @taggers.collect do |tag|
    case tag
    when Proc
      tag.call(request)
    when Symbol
      request.send(tag)
    else
      tag
    end
  end
end

def initialize(app, taggers = nil)
  @app, @taggers = app, taggers || []
end

def started_request_message(request)
  'Started %s "%s" for %s at %s' % [
    request.request_method,
    request.filtered_path,
    request.ip,
    Time.now.to_default_s ]
end