Berlin Clock Kata

berlin.rb

require 'time'

class BerlinClock
  ON = '*'
  OFF = '.'

  def initialize(time)
    @time = time
  end

  def counts
    [
     @time.sec % 2,
     @time.hour.divmod(5),
     @time.min.divmod(5)
    ].flatten()
  end

  def format()
    [
     make_line(counts[0], 1),
     make_line(counts[1], 4),
     make_line(counts[2], 4),
     make_line(counts[3], 11),
     make_line(counts[4], 4),
    ].join("\n")
  end

  def print()
    puts format
  end

  private
  def make_line(active, total)
    ON * active + OFF * (total - active)
  end

end


BerlinClock.new(Time.parse("2011-04-16 10:11:01 A.M.")).print()
puts
BerlinClock.new(Time.parse("2011-04-16 12:00:00")).print()
puts
BerlinClock.new(Time.parse("2011-04-16 23:59:59")).print()
puts
BerlinClock.new(Time.parse("2011-04-16 01:00:01")).print()