Local Switches & Variables

#==============================================================================
# Local Switches and Variables
# Version 1.1
# By Szyu
#
# About:
# Use local variables and switches for each map, while holding the normal
# ones for global event triggering
#
# Instructions:
# - Place below "▼ Materials" but above "▼ Main Process".
#
# How to Use:
# - Event -> "Script..." ->
#   "$local_switches[switch_id] = true|false"
#   "$local_switches.set(map_id, switch_id, value)"
#   "$local_switches[switch_id] => returns the value of the local switch
#   "$local_switches.get(map_id, switch_id) => returns the value of the
#                                             local switch on map map_id
# - Same goes for local variables
#
# Requires:
# - RPG Maker VX Ace
#
# Terms of Use:
# - Free for commercal and non-commercial use. Please list me
#   in the credits to support my work.
#
# Pastebin:
# http://adf.ly/UP832
#
#==============================================================
#==============================================================
#   * Alias Map Using
#==============================================================
class Game_Map
  attr_accessor :local_switches
  attr_accessor :local_variables

  alias locale_switch_variable_init initialize
  alias locale_switch_variable_setup setup

  def initialize
    locale_switch_variable_init
    @local_switches = {}
    @local_variables = {}
  end

  def setup(map_id)
    locale_switch_variable_setup(map_id)
    @local_switches[map_id] = [] if !@local_switches[map_id]
    @local_variables[map_id] = [] if !@local_variables[map_id]
  end

end

#==============================================================
#   * Alias Object Creation
#==============================================================
module DataManager
  class << self
    alias sz_loc_switch_variable create_game_objects
  end

  def self.create_game_objects
    sz_loc_switch_variable
    $local_switches = Local_Switches.new
    $local_variables = Local_Variables.new
  end
end

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#==============================================================
#   * Local_Switches
#==============================================================
class Local_Switches

  def [](switch_id)
    $game_map.local_switches[$game_map.map_id][switch_id] || false
  end

  def []=(switch_id, value)
    $game_map.local_switches[$game_map.map_id][switch_id] = value
    on_change
  end

  def set(map_id, switch_id, value)
    $game_map.local_switches[map_id][switch_id] = value
    on_change
  end

  def get(map_id, switch_id)
    $game_map.local_switches[map_id][switch_id] || false
  end

  def on_change
    $game_map.need_refresh = true
  end
end

#==============================================================
#   * Local_Variables
#==============================================================
class Local_Variables

  def [](variable_id)
    $game_map.local_variables[$game_map.map_id][variable_id] || 0
  end

  def []=(variable_id, value)
    $game_map.local_variables[$game_map.map_id][variable_id] = value
    on_change
  end

  def set(map_id, variable_id, value)
    $game_map.local_variables[map_id][variable_id] = value
    on_change
  end

  def get(map_id, variable_id)
    $game_map.local_variables[map_id][variable_id] || 0
  end

  def on_change
    $game_map.need_refresh = true
  end
end