DSI More Battle Scope

#==============================================================================
# DSI More Battle Scope
# -- Last Updated: 2017.07.27
# -- Author: dsiver144
# -- Level: Easy
# -- Requires: n/a
#==============================================================================
$imported = {} if $imported.nil?
$imported["DSI-MoreBattleScope"] = true
#==============================================================================
# + Updates
# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
# 2017.07.27 - Finish first version.
#==============================================================================
# + Instructions
# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
# To install this script, open up your script editor and copy/paste this script
# to an open slot below ▼Materials but above ▼Main. Remember to save.
# * You should put this script below all script relate to drawing enemy state
# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
# Skill's, Item's Notetags:
# + <scope: random ally>
# + <scope: random all but user>
# + <scope: all but user>
#==============================================================================
module DSIVER144
  module BATTLE_SCOPE
    REGEXP = /<scope:\s*(.+)>/i
  end # BATTLE_SCOPE
end # DSIVER144

class Game_System
  alias_method(:load_notetag_item_skills, :initialize)
  def initialize
    ($data_items+$data_skills).each do |item|
      next if item.nil?
      item.load_scope_notetags
    end
    load_notetag_item_skills
  end
end # Game_System

class RPG::UsableItem < RPG::BaseItem
  include DSIVER144::BATTLE_SCOPE
  #--------------------------------------------------------------------------
  # * new method: load_scope_notetags
  #--------------------------------------------------------------------------
  def load_scope_notetags
    @dsi_scope = :none
    if self.note =~ REGEXP
      if $1 == "random ally"
        @dsi_scope = :random_ally
      end
      if $1 == "random all but user"
        @dsi_scope = :random_all_but_user
      end
      if $1 == "all but user"
        @dsi_scope = :all_but_user
      end
    end
  end
  #--------------------------------------------------------------------------
  # * new method: is_custom_scope?
  #--------------------------------------------------------------------------
  def is_custom_scope?
    return @dsi_scope != :none
  end
  #--------------------------------------------------------------------------
  # * new method: is_random_ally?
  #--------------------------------------------------------------------------
  def is_random_ally?
    @dsi_scope == :random_ally
  end
  #--------------------------------------------------------------------------
  # * new method: is_random_all_but_user?
  #--------------------------------------------------------------------------
  def is_random_all_but_user?
    @dsi_scope == :random_all_but_user
  end
  #--------------------------------------------------------------------------
  # * new method: is_random_all_but_user?
  #--------------------------------------------------------------------------
  def is_all_but_user?
    @dsi_scope == :all_but_user
  end
end # RPG::UsableItem

class Game_Action
  #--------------------------------------------------------------------------
  # * Create Target Array
  #--------------------------------------------------------------------------
  alias_method(:dsi_game_action_make_targets, :make_targets)
  def make_targets
    if !forcing && subject.confusion?
      targets = [confusion_target]
    elsif item.is_custom_scope?
      targets = make_custom_targets
    else
      targets = dsi_game_action_make_targets
    end
    return targets
  end
  #--------------------------------------------------------------------------
  # * new method: make_custom_targets
  #--------------------------------------------------------------------------
  def make_custom_targets
    target = []
    if item.is_random_ally?
      target << friends_unit.random_target_ex(subject)
      target.compact!
    end
    if item.is_random_all_but_user?
      if rand(3) == 1
        target << opponents_unit.random_target
      else
        target << friends_unit.random_target_ex(subject)
      end
    end
    if item.is_all_but_user?
      target = opponents_unit.alive_members + friends_unit.other_members(subject)
    end
    return target
  end

end # Game_Action

class Game_Unit
  #--------------------------------------------------------------------------
  # * new method: random_target_ex
  #--------------------------------------------------------------------------
  def random_target_ex(subject)
    rand_array = other_members(subject)
    rand_array[0]
  end
  #--------------------------------------------------------------------------
  # * new method: other_members
  #--------------------------------------------------------------------------
  def other_members(subject)
    return (alive_members - [subject]).shuffle
  end
end