module RSS::BaseTrackBackModel

# File lib/rss/trackback.rb, line 27
    def append_features(klass)
      super

      unless klass.class == Module
        klass.module_eval {include TrackBackUtils}

        klass.install_must_call_validator(TRACKBACK_PREFIX, TRACKBACK_URI)
        %w(ping).each do |name|
          var_name = "#{TRACKBACK_PREFIX}_#{name}"
          klass_name = "TrackBack#{Utils.to_class_name(name)}"
          klass.install_have_child_element(name, TRACKBACK_URI, "?", var_name)
          klass.module_eval("            remove_method :#{var_name}
            def #{var_name}
              @#{var_name} and @#{var_name}.value
            end

            remove_method :#{var_name}=
            def #{var_name}=(value)
              @#{var_name} = Utils.new_with_value_if_need(#{klass_name}, value)
            end
", __FILE__, __LINE__)
        end

        [%w(about s)].each do |name, postfix|
          var_name = "#{TRACKBACK_PREFIX}_#{name}"
          klass_name = "TrackBack#{Utils.to_class_name(name)}"
          klass.install_have_children_element(name, TRACKBACK_URI, "*",
                                              var_name)
          klass.module_eval("            remove_method :#{var_name}
            def #{var_name}(*args)
              if args.empty?
                @#{var_name}.first and @#{var_name}.first.value
              else
                ret = @#{var_name}.__send__("[]", *args)
                if ret.is_a?(Array)
                  ret.collect {|x| x.value}
                else
                  ret.value
                end
              end
            end

            remove_method :#{var_name}=
            remove_method :set_#{var_name}
            def #{var_name}=(*args)
              if args.size == 1
                item = Utils.new_with_value_if_need(#{klass_name}, args[0])
                @#{var_name}.push(item)
              else
                new_val = args.last
                if new_val.is_a?(Array)
                  new_val = new_value.collect do |val|
                    Utils.new_with_value_if_need(#{klass_name}, val)
                  end
                else
                  new_val = Utils.new_with_value_if_need(#{klass_name}, new_val)
                end
                @#{var_name}.__send__("[]=", *(args[0..-2] + [new_val]))
              end
            end
            alias set_#{var_name} #{var_name}=
", __FILE__, __LINE__)
        end
      end
    end