A class-base DSL for Ruby asset components

komponent.rb

class Komponent
  class << self
    attr_reader :css_block, :html_block, :script_block

    def css(value=nil ,&block)
      @css_block = Proc.new { value || block.call }
    end

    def html(value=nil ,&block)
      @html_block = Proc.new { value || block.call }
    end

    def script(value=nil ,&block)
      @script_block = Proc.new { value || block.call }
    end
  end

  def html
    eval("\"" + self.class.html_block.call + "\"")
  end

  def css
    eval("\"" + self.class.css_block.call + "\"")
  end
end

class Headline < Komponent
  css %q{
    h1 {
      color: #{highlight};
    }
  }

  html %q{
    <h1>Hi #{@name}, its #{time}</h1>
  }

  def initialize(name:)
    @name = name
  end

  def time
    Time.now
  end

  def highlight
    "green"
  end
end

component = Headline.new(name: "Brad")
p component.html
p component.css