Accessing Rails helpers from a presenter/module?

There are many questions about accessing Rails helpers from a model, all of which rightfully state that the answer is not to do that. This is not that question.

I have some fairly complex controller and view code that I want to abstract into a presenter class. But that class isn't a descendant of ApplicationController. How can I get开发者_运维技巧 access to, say, devise's current_user?

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It appears there's no "official right" way to do this at the moment. Two possibilities:

1. It's hacky, but you can store the current controller in ApplicationController, and reference it in your presenters to get at the helpers:

   class ApplicationController < ActionController::Base
     prepend_before_filter { @@current_controller = self }
   end
   
   class YourPresenter
     def current_user
       ApplicationController.current_controller.current_user
     end
   end
   

   1. Jeff Casimir is working on a great Decorator/Presenter gem called draper that encapsulates the whole idea:

https://github.com/jcasimir/draper