[Overwrite] WPN Change Actor Class

=begin
#===============================================================================
 Title: Weapon Class Changing
 Author: Kadafi
 Date: Aug 8, 2017
--------------------------------------------------------------------------------
 ** Change log
 Aug 10, 2017
   - Bug fixes
 Aug 9, 2017
   - Bug fixes
 Aug 8, 2017
   - Initial release
--------------------------------------------------------------------------------
 ** Description

 Change actor class when a weapon equipped.

--------------------------------------------------------------------------------
 ** Installation

 Place this script below Materials and above Main

--------------------------------------------------------------------------------
 ** Usage

 Set the weapon notetag

   <change actor class: id>

 For example,

   <change actor class: 3>

 Set the Weapon Class based Skill notetag

   <ClassSkill>

#===============================================================================
=end
$imported = {} if $imported.nil?
$imported["Kadafi_WeaponClassChanging"] = true
#===============================================================================
# ** Configuration
#===============================================================================
module Kadafi
  module Class_Changing
    Keep_Exp = true
  end
end

#==============================================================================
# ** RPG::Weapon
#==============================================================================

class RPG::Weapon < RPG::EquipItem
  #--------------------------------------------------------------------------
  # * Actor Change Class ID
  #--------------------------------------------------------------------------
  def actor_change_class_id
    note =~ /<change actor class: (\d+)>/i ? $1.to_i : 0
  end
end

#==============================================================================
# ** Game_Actor
#==============================================================================

class Game_Actor < Game_Battler
  #--------------------------------------------------------------------------
  # * Change Equipment
  #--------------------------------------------------------------------------
  alias old_change_equip change_equip
  def change_equip(slot_id, item)
    old_change_equip(slot_id, item)
    if slot_id == 0
      if item && @equips[slot_id].object == item
        if item.actor_change_class_id > 0
          if @class_id != item.actor_change_class_id
            keep_exp = Kadafi::Class_Changing::Keep_Exp
            change_class(item.actor_change_class_id, keep_exp)
            if @skill_id > 0
              if $data_skills[@skill_id].note =~ /<ClassSkill>/
                @skill_id = 0
              end
            end
            if @skill2_id > 0
              if $data_skills[@skill2_id].note =~ /<ClassSkill>/
                @skill2_id = 0
              end
            end
          end
        end
      end
    end
  end
end