casino.rb

require 'player.rb'
require 'poker.rb'

class Casino

  
  
  def initialize

    @total_1 = {'John' => 0, 'Mary' => 0, 'Luke' => 0, 'Eimear' => 0}
    @total_2 = {'John' => 0, 'Mary' => 0, 'Luke' => 0, 'Eimear' => 0}


    @analyser_1 = Proc.new do |this_game|
      results = this_game.results
                        
      # find out who won
      winner_name = this_game.winner.name.to_s
      @total_1[winner_name] = @total_1  [winner_name] + 1
      
    end    
    
    @analyser_2 = Proc.new do |this_game|
      results = this_game.results
      
      # find out who won
      winner_name = this_game.winner.name.to_s
      @total_2[winner_name] = @total_2[winner_name] + 1
      
    end    
    
  end

  def watch_games
  
    players = [Player.new("John"), Player.new("Mary"), Player.new("Luke"), Player.new("Eimear")]
    poker_game = Poker.new 100, players

    poker_game.add_observer @analyser_1
    poker_game.add_observer @analyser_2

    poker_game.play
    # poker_game.print_results
      
    puts " total_1: #{@total_1.to_s}"   
    puts " total_2: #{@total_2.to_s}"   
    
  end
  
end


casino = Casino.new
casino.watch_games

poker.rb

require 'player.rb'
require 'hand.rb'
require 'deck.rb'
require 'pile.rb'
require 'subject.rb'

# Class that represents a simple 1-card poker game.
class Poker
  include Subject
  
  attr_reader :results, :winner
  
  # Create poker game of given number of rounds using players array.
  def initialize  no_of_rounds, players
    super()
    @players = players
    @no_of_rounds = no_of_rounds
    @results = Hash.new
    @players.each do |player|
      @results[player.name] = []
    end
  end

  # Player the game of Poker.
  def play
    @pile = Pile.new
    @no_of_rounds.times do
      play_round
      @pile.empty!
    end    
  end

  # Play an individual round.
  def play_round
    @deck = Deck.new
    # deal each player a hand
    @players.each do |player|
      player.set_hand(@deck.deal_hand(1))
    end
    # Each player plays a card
    @players.each do |player|
      @pile.add(player.play)
    end
    winning_card = @pile.calculate_winner
    @winner = nil
    # find out who played the winning card
    @players.each_with_index do |player, i|
      if winning_card == player.last_card_played
        @winner = player
      end
    end
    @results[@winner.name] << winning_card.to_string
    
    # notify that a round has ended
    notify_observers
  end

  # Print the overall results of the series of rounds
  def print_results
    @results.each do |name, results|
      puts "#{name} won #{@results[name].length} times with #{results}"
    end
  end
end

players = [Player.new("John"), Player.new("Mary"), Player.new("Luke"), Player.new("Eimear")]
poker_game = Poker.new 100, players
poker_game.play
poker_game.print_results

subject.rb

module Subject
  
  def initialize 
    @observers = []
  end

  def add_observer observer
    @observers << observer
  end
  
  def delete_observer observer
    @observers.delete observer
  end

  # use PUSH model for notification 
  # Procs will require one argument (a reference to the subject) 
  def notify_observers
    @observers.each do |observer|
      observer.call(self) 
    end
  end 

end

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