1  
   2  class Card
   3    include Comparable
   4    attr_accessor :suit, :value
   5  
   6    @@values = Hash.new { |hash, key| key.to_s }
   7    @@values.merge!(11 => 'jack', 12 => 'queen', 13 => 'king', 14 => 'ace')
   8    
   9    def initialize(suit, value)
  10      @suit = suit
  11      @value = value
  12    end
  13    
  14    def to_s
  15      "#{@@values[@value]} of #{@suit}s"
  16    end
  17    
  18    def <=> (other)
  19      @value <=> other.value
  20    end
  21  end
  22  
  23  class GroupOfCards < Array
  24    def shuffle!
  25      replace(sort_by { rand })
  26    end
  27    
  28    def to_s
  29      join(", ")
  30    end  
  31  end
  32  
  33  class Deck < GroupOfCards
  34    def initialize
  35      [:spade, :diamond, :club, :heart].each do |suit|
  36        (2..14).each do |value|
  37          push(Card.new(suit, value))
  38        end
  39      end
  40    end  
  41  end
  42  
  43  class Player
  44    attr_accessor :name, :table
  45    
  46    def initialize(name)
  47      @name = name
  48      @hand = GroupOfCards.new
  49      @pile = GroupOfCards.new
  50      @table = GroupOfCards.new
  51    end
  52    
  53    def play_card
  54      if @hand.empty?
  55        @hand, @pile = @pile, @hand
  56        @hand.shuffle!
  57      end
  58      @table << @hand.pop
  59    end
  60    
  61    def add_card(card)
  62      @pile << card
  63    end
  64    
  65    def cards
  66      @hand + @pile
  67    end
  68    
  69    def showing
  70      @table.last
  71    end
  72    
  73    def card_count
  74      @hand.size + @pile.size + @table.size
  75    end
  76    
  77    def has_cards?
  78      card_count > 0
  79    end
  80    
  81    def status
  82      "#{@name}(#{card_count}) plays #{showing}"
  83    end
  84    
  85    def to_s
  86      name
  87    end
  88  end
  89  
  90  class GameOfWar
  91    def initialize(player_count=2)
  92      deck = Deck.new
  93      deck.shuffle!
  94      @players = Array.new(player_count) { |i| Player.new("Player #{i+1}") }
  95      
  96      deck.shuffle!
  97      until deck.empty?
  98        player = @players.shift
  99        player.add_card(deck.pop)
 100        @players.push(player)
 101      end  
 102    end
 103    
 104    def play_round(players)
 105      spoils_of_war = []
 106      
 107      # get cards
 108      players.each do |p| 
 109        p.play_card
 110        puts p.status
 111      end 
 112      
 113      # find winner (handle ties)
 114      winners = players.sort_by { |p| p.showing }
 115      high_card = winners.last.showing
 116      
 117      winners = winners.select { |p| p.showing == high_card }
 118      
 119      # deal with ties
 120      if winners.size > 1
 121  	    puts "WAR: #{winners.join(", ")}"
 122  	    # put one card "in the kitty"
 123  	    winners.each { |p| p.play_card }
 124        winner = play_round(winners)
 125      else
 126        winner = winners.first
 127  		  puts "Winner: #{winner}"
 128      end
 129      
 130      players.each { |p| spoils_of_war += p.table; p.table = [] }
 131      spoils_of_war.each { |c| winner.add_card(c) }
 132      winner
 133    end
 134    
 135    def play
 136      round = 1
 137      until @players.size == 1
 138        puts "\nAt Round #{round}"
 139        play_round(@players)
 140        round += 1
 141        
 142        # check for loosers
 143        loosers = @players.select { |p| p.card_count == 0 }
 144        loosers.each { |p| puts "#{p} lost"}
 145        @players -= loosers
 146      end
 147      
 148      puts "\n#{@players.first.name} Won!!!"
 149    end
 150    
 151    def to_s
 152      @players.join("\n")
 153    end
 154  end
 155  
 156  if __FILE__ == $0
 157    g = GameOfWar.new 3
 158    g.play
 159  end