[IEX2]Randomize Battle Skills[VX]

#==============================================================================#
# ● IEX2 - Randomize Battle Skills [VX]
#==============================================================================#
# // • Created By    : IceDragon
# // • Data Created  : 03/25/2012
# // • Data Modified : 03/25/2012
# // • Version       : 1.0
# // • RGSS.design   : 2 (VX-Default)
#==============================================================================#
# ● Installation
#     Below
#       Material
#       Scripts that make changes to actor.skills
#     Above
#       Main
#==============================================================================#
# ● How to Modify
#    set_rand_skills(n=4)
#     In the Game_Actor class, set_rand_skills, creates an array of 'n' size
#     And selects skills until its full (there will be no duplicates)
#     If the number of available skills falls under the array size, it will
#     be ignored.
#     If you wish to change the number of random skills, simply change the value
#     of 'n'
#
#    reset_rand_turn_count()
#     This will set the number of turns till the next randomization
#     By default:
#      @rand_turn_count = 3 + rand(2)
#      The number of turns will be 3 or 4
#==============================================================================#
# ● Change Log
#     ♣ 03/25/2012 V1.0
#         Completed Script
#==============================================================================#
# // 1.9 Functions
class Array
  def shuffle()
    self.sort_by{rand}
  end unless(method_defined?(:shuffle))
  def shuffle!()
    self.replace(shuffle())
  end unless(method_defined?(:shuffle!))
  def pick()
    self[rand(self.size)]
  end unless(method_defined?(:pick))
  def pick!()
    self.delete(pick())
  end unless(method_defined?(:pick!))
end
class Integer
  def pred()
    self - 1
  end unless method_defined?(:pred)
  def succ()
    self + 1
  end unless method_defined?(:succ)
end
# // VX
class Game_Battler
  def all_skills()
    []
  end
  def random_skills()
    set_rand_skills() unless(@random_skills)
    @random_skills
  end
  def set_rand_skills(n=4)
    sks = all_skills().compact().collect{|s|s.id}
    (@random_skills ||=[]).replace(Array.new(n){sks.pick!()}.compact)
  end
  def randomize_skills?()
    @randomize_skills = true if(@randomize_skills.nil?())
    @randomize_skills
  end
  attr_writer :randomize_skills
  def rand_turn_count()
    reset_rand_turn_count() unless(@rand_turn_count)
    @rand_turn_count
  end
  def reset_rand_turn_count()
    @rand_turn_count = 3 + rand(2)
  end
  def at_turn_end()
    @rand_turn_count = rand_turn_count.pred
    if(@rand_turn_count <= 0)
      set_rand_skills() if(randomize_skills?())
      reset_rand_turn_count()
    end
  end
end
class Game_Actor
  alias :all_skills :skills unless($@)
  def skills()
    $game_temp.in_battle ? random_skills.collect{|id|$data_skills[id]} : all_skills()
  end
end
class Game_Unit
  def at_turn_end()
    members.each{|m|m.at_turn_end()}
  end
end
class Scene_Battle
  alias :at_turn_end :turn_end unless($@)
  def turn_end(*args,&block)
    $game_party.at_turn_end()
    $game_troop.at_turn_end()
    at_turn_end(*args,&block)
  end
end
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