fight.rb

require 'alias_dci' 
class Battle
  include AliasDCI::Context
  
  role :lion do
    def fight
      p "#{name}: RAWR, I am a lion and I run fast."
    end
  end 
  
  role :bear do
    def fight
      p "#{name}: ARRR, I am a mighty  bear and I will eat you."
    end
  end
  
  def initialize(lion_player, bear_player)
    rebind(lion_player, bear_player)
  end
  
  def rebind(lion_player, bear_player)
    assign_named_roles(:lion => lion_player, :bear => bear_player)
  end
  
  def do_battle
    in_context do
      lion.fight
      bear.fight
    end
  end
end

class Player < Struct.new(:name)
  include AliasDCI::DataObject
  
  def fight
    puts "#{name}: original fight method"
  end
end

#Round 1

player_a = Player.new("Arthur Dent")
player_b = Player.new("Zaphod")


player_a.fight
player_b.fight

battle = Battle.new(player_a, player_b)

#round1
p "ROUND 1 : FIGHT"
battle.do_battle 

#Round2

p "ROUND 2 : FIGHT"
battle.rebind(player_b, player_a)
battle.do_battle

player_a.fight
player_b.fight


# >> Arthur Dent: original fight method
# >> Zaphod: original fight method

# >> "ROUND 1 : FIGHT"
# >> "Arthur Dent: RAWR, I am a lion and I run fast."
# >> "Zaphod: ARRR, I am a mighty  bear and I will eat you."
# >> "ROUND 2 : FIGHT"
# >> "Zaphod: RAWR, I am a lion and I run fast."
# >> "Arthur Dent: ARRR, I am a mighty  bear and I will eat you."

# >> Arthur Dent: original fight method
# >> Zaphod: original fight method