This is a class.

datatemplate.rb

  class DataTemplate
    attr_reader :data, :narrative

    def initialize(data_hash)
      #code written with help from jon2992 (IRC name: aegis3121)
      data_hash.each do |key, value|
        self.instance_variable_set("@#{key}", value)
        self.class.send :attr_reader, key
      end
      @narrative = []
      write_narrative
    end

    def write_narrative
      #user writes in what should happened next
      raise "There is no 'write_narrative' method present in your class."
    end

    def write(klass)
      @narrative << klass.new.generate
    end

    def conditional_write(condition, klass_a, klass_b = nil)
      if condition
        @narrative << klass_a.new.generate
      elsif klass_b
        @narrative << klass_b.new.generate
      else
      end
    end

    def publish
      outline = @narrative.join(" ")
      insert_data(outline)
    end

    private
    def insert_data(outline)
      outline = ERB.new(outline)
      outline.result(binding)
    end

  end
end