bingo.rb

#!/usr/bin/env ruby
# encoding: utf-8

require 'readline'

class Wheel
  CR = "\r"
  WHEEL = ["\\", "|", "/", "-"]

  def initialize sec
    @sec = sec
    @index = 0
    STDOUT.sync = true
  end

  def self.define_spin name
    define_method name do
      wheel = (name =~ /back/ ? WHEEL.reverse : WHEEL)
      print wheel[(@index % 4)] + CR
      @index += 1
      sleep @sec
    end
  end

  define_spin :forward
  define_spin :backward
end

class Bingo
  def initialize(range=nil)
    @prng = nil
    @done = []
    @range      = (range || (1..100))
    @candidates = (@range).to_a
  end

  def start
    now = Time.now
    puts "Start: #{now}"
    started_at = now.to_i
    @prng = Random.new(started_at)
    begin
      while action = Readline.readline("Bingo> ")
        case action
        when 'quit','q'   ; break
        when 'done','d'   ; done
        when 'help','h'   ; help
        when 'next','n',''; handle
        when 'count','c'  ; count
        end
        break if @candidates.empty?
      end
    rescue Interrupt # C-c
      system("stty", `stty -g`.chomp)
      puts
      exit
    end
    finished = Time.now
    puts "End: #{finished} (#{finished.to_i - started_at} sec.)"
  end

  def count
    puts "Count: #{@done.length}"
  end

  def done
    p @done
  end

  def help
    puts <<HELP
Action:
  next, n, Puts next number [Enter]
  quit, q  Quit the game
  help, h  Show this message
  done, d  Puts called numbers
HELP
  end

  private

  def handle
    w = Wheel.new(0.03)
    loop do
      10.times{ w.forward }
      number = @prng.rand(@range).to_i
      unless @done.include?(number)
        @done << @candidates.delete(number)
        puts "Number: #{number}"
        break
      end
    end
  end
end

if $0 == __FILE__
  w = Wheel.new(0.03)
  10.times{ w.backward }
  puts <<BANNER
Bingo !!!
BANNER
  bingo = Bingo.new
  bingo.help
  bingo.start
end