gistfile1.txt

module VersioningMethods

  def self.included(klass)

    klass.instance_eval <<-EOF
      def deleted_list
        deleted_item_list = []
        Version.all.sort_by{ |version| version[:created_at] }.reverse!.each do |version|
          if version.item_type == "#{klass.name}" && version.event == 'destroy' 
            deleted_item_list << version.reify
          end
        end
        return deleted_item_list
      end
    EOF

    klass.instance_eval <<-EOF
      def self.undelete(id)
        # Restore the class object
        Version.all.each do |version|
          if version.item_type == "#{klass.name}" && version.event == 'destroy' 
            deleted_item = version.reify
            if deleted_item.id == id
              deleted_item.save
            end
          end
        end
        
        # Now restore it's dependent objects
        @@dependents.each do |dep| 
          Version.all.each do |version|
            if version.item_type == dep.to_s && version.event == 'destroy' 
              deleted_item = version.reify
              if deleted_item.department_id == id
                dep.undelete(deleted_item.id)
              end
            end
          end
        end
      end
    EOF
  end

end