Layout presenter inheritance on Rails

app-presenters-presenter.rb

class Presenter
  def initialize(subject, options = {})
    @subject = subject
    init_haml_helpers
  end

  private
  
  def method_missing(*args, &block)
    @subject.send(*args, &block)
  end
end

application_controller.rb

class ApplicationController < ActionController::Base
  def self.layout_presenter(type, options = {})
    @_layout_presenter_type = type     
    remove_possible_method(:_layout_presenter_type)
    self.class_eval %{def _layout_presenter_type; #{@_layout_presenter_type.inspect} end}, __FILE__, __LINE__
  end
  
  def layout_presenter
    unless @layout_presenter
      type = nil
      
      if respond_to?(:_layout_presenter_type) && _layout_presenter_type.present?
        type = _layout_presenter_type
      elsif _layout.present?
        type = "View::#{_layout.classify}Layout"
      else 
        raise NotImplementedError
        
        # maybe ...
        type = "View::Layout"
      end
      
      raise ArgumentError if type.blank?
      
      @layout_presenter ||= PresenterFactory.create(type, self.view_context, request.format)
    end
    
    @layout_presenter
  end
  
  helper_method :layout_presenter
end

application_helper.rb

Module ApplicationHelper
  include Haml::Helpers
  
  ...
end

communities_controller.rb

class CommunitiesController < ApplicationController
  layout 'community'

  ...
end

community.haml

!!!

%html
  = layout_presenter.head
  %body
    ...

lib-presenter_factory.rb

class PresenterFactory
  def self.create(type, template, format, options = {})
    #type = self.class.name.split('::').last.gsub('Factory', '')
    namespace = nil
    
    if format.to_sym == :mobile
      namespace = 'Mob'
    elsif format.to_sym == :facebook
      namespace = 'Facebook'
    elsif format.to_sym == :workflow
      namespace = 'Workflow'
    elsif format.to_sym == :html
      namespace = 'Desktop'
    end
    
    raise NotImplementedError.new("Unexpected format #{format.inspect}") if namespace.blank?
    
    eval("#{[namespace, type].join('::')}.new(template, options)")
  end
end

presenters_module.rb

class View::Layout < ::Presenter
  def head(options = {})
    render 'layouts/head', options  
  end 
end

class Html::View::Layout < ::View::Layout
end

class Facebook::View::Layout < ::View::Layout
  def head(options = {})
    options.merge!(locals: {stylesheet: 'facebook'})

    super(options)
  end 
end

class Html::View::CommunityLayout < ::Html::View::Layout
  include ::View::CommunityLayout
end

class Facebook::View::CommunityLayout < ::Html::View::Layout
  include ::View::CommunityLayout
end

module View::CommunityLayout
  extend ActiveSupport::Concern

  def format_overall_method
    ...
  end
end

presenters_structure.txt

app/presenters/$format (e.g. html)
  $domain (e.g. view)
app/presenters/$domain (e.g. view)