Jewelve.rb

# -*- coding: utf-8 -*-

module StringsOfJewelve
  COLOR_NUMBERS = (0..7).to_a

  def to_jewelve
    return self.split('').map(&:to_random_colored).shuffle.join
  end

  def to_random_colored
    fg_color, bg_color = select_fg_bg_colors
    return "\e[7;3#{fg_color};4#{bg_color}m" + self + "\e[m"
  end

  def to_default_colored
    return "\e[39;49m" + self + "\e[m"
  end

  private

  def select_fg_bg_colors
    return COLOR_NUMBERS.sample(2)
  end
end

module JewelveIOExtention
  SPECIAL_MARKERS = (0..31)

  def write(str)
    if str.bytes.any? {|c| SPECIAL_MARKERS.include?(c)}
      super str
    else
      10.times do
        sleep(0.1)
        super "\e[s"
        super str.to_jewelve
        super "\e[u"
      end
      super str.to_default_colored
    end
  end
end

String.send(:include, StringsOfJewelve)
$stdout.extend(JewelveIOExtention)