controller_method.rb
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	module Responders
	module ControllerMethod
	# Adds the given responders to the current controller's responder, allowing you to cherry-pick
	# which responders you want per controller.
	#
	# class InvitationsController < ApplicationController
	# responders :flash, :http_cache
	# end
	#
	# Takes symbols and strings and translates them to VariableResponder (eg. :flash becomes FlashResponder).
	# Also allows passing in the responders modules in directly, so you could do:
	#
	# responders FlashResponder, HttpCacheResponder
	#
	# Or a mix of both methods:
	#
	# responders :flash, MyCustomResponder
	#
	def responders(*responders)
	self.responder = responders.inject(Class.new(responder)) do \|klass, responder\|
	responder = case responder
	when Module
	responder
	when String, Symbol
	Responders.const_get("#{responder.to_s.camelize}Responder")
	else
	raise "responder has to be a string, a symbol or a module"
	end

	klass.send(:include, responder)
	klass
	end
	end
	end
	end

	ActionController::Base.extend Responders::ControllerMethod