Contents

require 'ruhl/rails/active_record'
require 'ruhl/rails/helper'

module Ruhl
  module Rails
    class Presenter
      include Ruhl::Rails::ActiveRecord
      include Ruhl::Rails::Helper
  
      attr_reader :presentee, :context
  
      def initialize(obj, context)
        @presentee = obj
        @context = context
        define_paths(obj.class.name.underscore.downcase)
      end
    
      def method_missing(name, *args)
        if presentee.respond_to?(name)
          # Pass presenter method call to model so you don't have to
          # redefine every model method in the presenter class.
          presentee.send(name, *args)
        elsif context.respond_to?(name)
          # Instead of saying context.link_to('Some site', some_path)
          # can just use link_to
          context.send(name, *args)
        end
      end

      # Extend scope of respond_to? to model.
      def respond_to?(name)  
        if super
          true
        else
          presentee.respond_to?(name)
        end
      end  
    end
  end
end

module ActionController
  class Base    

    protected

    def present(object_sym, action_sym)
      render  :template => "#{object_sym.to_s.pluralize}/#{action_sym}", 
        :locals => {:object => presenter_for( instance_variable_get("@#{object_sym}") )}    
    end

    def presenter_for(obj)
      Object.const_get("#{obj.class.name}Presenter").new(obj, @template)
    end
    
    helper_method :presenter_for   
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
ruhl-0.17.0	lib/ruhl/rails/ruhl_presenter.rb
ruhl-0.16.0	lib/ruhl/rails/ruhl_presenter.rb