Nat & Damian's solution to #spaconf_2014

gistfile1.rb

class Bottles
  
  @@bottles = {
      0 => 'no more bottles',
      1 => '1 bottle',
      2 => '{n} bottles'
  }

  @@actions = {
       0 => 'Go to the store and buy some more',
       1 => 'Take it down and pass it around',
       2 => 'Take one down and pass it around'
  }


  def initialize
    @my_bottles = @@bottles
  end

  def verse(n)
    this_bottles=bottles(n)
    next_bottles=bottles((n + 99 ) % 100)
    <<-VERSE
#{this_bottles.to_str.capitalize} of beer on the wall, #{this_bottles} of beer.
#{action(n)}, #{next_bottles} of beer on the wall.
    VERSE
  end

  def bottles(n)
    phrase(@my_bottles, n)
  end

  def action(n)
    phrase(@@actions, n)
  end

  def phrase(phrases, n)
    (phrases[n] or phrases[2]).sub("{n}", n.to_s)
  end

  def verses(n1, n2)
    (n1.downto n2).map {|n| verse(n)}.join("\n")
  end

  def song
    verses(99, 0)
  end
end

class SixPackBottles < Bottles
  
  @@bottles = {
      0 => 'no more bottles',
      1 => '1 bottle',
      2 => '{n} bottles',
      6 => '1 six pack'
  }

end