merb plugin (footnotes)

my footnotes class

module Footnotes
  class Filter
    def initialize(controller)
      @controller = controller
      @template = controller.instance_variable_get(:@template)
      @body = controller.body
      @notes = []
    end
    # .. lots more ..
  end
end

my plugin loader

  Merb::BootLoader.before_app_loads do
    if Merb.env == "development" || Merb::Plugins.config[:merb_footnotes][:force]
      Merb::Controller.before do
        Footnotes::Filter.start!(self)
      end
    end
  end
  
  Merb::BootLoader.after_app_loads do
    if Merb.env == "development" || Merb::Plugins.config[:merb_footnotes][:force]
      Merb::Controller.after do 
        filter = Footnotes::Filter.new(self)
        filter.add_footnotes!
        filter.close!(self)
      end
    end
  end