Custom DM add-on

#-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
# Custom DM add-on
# Author: Eshra
# First Version: 30 Oct. 2012
# Compatibility: RPG Maker VX Ace
# Dependencies:
#     1. Tsuki_CustomDataManager
#-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
#
#------------------------------------------------------------------------------
# * How to Use
#------------------------------------------------------------------------------
# This script is for use with the custom database/manager, it provides a notetag
# to label a specific item in the database as unique
#
# <Unique>
#
# Once in the party's inventory, the unique item exists as a separate entity in
# the database, when it is removed from the party's inventory it is removed from
# the database. If properties of the unique item are changed, it will have no
# effect on new instances of that type of item.
#- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
#
# Original Release Date: 7 Nov. 2012
#
# Update Log:
# 3 Nov. 2012 - Fixed problem occuring when adding more than one unique item to
#               the party's inventory
# 30 Oct. 2012 - First version completed
#
#-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
$imported ||= {}
raise "Tsuki_CustomDataManager is required for the DM add-on" if !$imported["Tsuki_CustomDataManager"]
$imported["(~^_^)~Custom DM add-on"] = 0.1

#==============================================================================
# ** Unique RPG BaseItem
#==============================================================================
module UniqueRPGBI
  RE = /<Unique>/
end # UniqueRPGBI
#==============================================================================
# ** RPG::BaseItem
#==============================================================================
class RPG::BaseItem
  attr_accessor :is_unique_rpgbi
  attr_accessor :id
  #----------------------------------------------------------------------------
  # * Is a Potential Unique Item? - Check if this obj. can show up in the
  #     party's inventory.
  #----------------------------------------------------------------------------
  def valid_uniq_party_item?
    self.is_a?(RPG::Item) || self.is_a?(RPG::Armor) || self.is_a?(RPG::Weapon)
  end # valid_uniq_party_item?

end # RPG::BaseItem
#==============================================================================
# ** RPG::Item
#==============================================================================
class RPG::Item < RPG::UsableItem
  #----------------------------------------------------------------------------
  # * Add to Custom Database
  #----------------------------------------------------------------------------
  def add_to_dbases
    self.id = $data_items.length
    $custom_items.push(self)
    $data_items.push(self)
  end
  #----------------------------------------------------------------------------
  # * Remove From Custom Database
  #----------------------------------------------------------------------------
  def sub_fr_dbase
    $custom_items.delete(self)
  end # sub_fr_dbase

end # RPG::Item
#==============================================================================
# ** RPG::Armor
#==============================================================================
class RPG::Armor < RPG::EquipItem
  #----------------------------------------------------------------------------
  # * Add to Custom Database
  #----------------------------------------------------------------------------
  def add_to_dbases
    self.id = $data_armors.length
    $custom_armors.push(self)
    $data_armors.push(self)
  end
  #----------------------------------------------------------------------------
  # * Remove From Custom Database
  #----------------------------------------------------------------------------
  def sub_fr_dbase
    $custom_armors.delete(self)
  end # sub_fr_dbase

end # RPG::Armor
#==============================================================================
# ** RPG::Weapon
#==============================================================================
class RPG::Weapon < RPG::EquipItem

  #----------------------------------------------------------------------------
  # * Add to Custom Database
  #----------------------------------------------------------------------------
  def add_to_dbases
    self.id = $data_weapons.length
    $custom_weapons.push(self)
    $data_weapons.push(self)
  end
  #----------------------------------------------------------------------------
  # * Remove From Custom Database
  #----------------------------------------------------------------------------
  def sub_fr_dbase
    $custom_weapons.delete(self)
  end # sub_fr_dbase

end # RPG::Weapon

#==============================================================================
# ** DataManager
#==============================================================================
module DataManager
  class << self
    alias ldb_ntags_unique_rpgbi_voldb load_database
  end
  #----------------------------------------------------------------------------
  # * Load Database
  #----------------------------------------------------------------------------
  def self.load_database
    ldb_ntags_unique_rpgbi_voldb
    ld_vol_db_ntags_uniquerpgi
  end
  #----------------------------------------------------------------------------
  # * Load Tags
  #----------------------------------------------------------------------------
  def self.ld_vol_db_ntags_uniquerpgi
    iter = [$data_items, $data_weapons, $data_armors]
    iter.each{ |set|
      set.each{ |item|
        next unless item
        item.note.split(/[\r\n]+/).each{ |line|
          case line
          when UniqueRPGBI::RE
            item.is_unique_rpgbi = true
          end
        }
      }
    }
  end # ld_vol_db_ntags_uniquerpgi

end # DataManager
#==============================================================================
# * Game_Party
#==============================================================================
class Game_Party < Game_Unit

  # Modify gain_item, remove the item from the volatile DB when the party
  # no longer has any of them.

  # Make a new entry in the db when the party gains a unique item and modify the
  # id of that item such that it is the largest in the db

  #----------------------------------------------------------------------------
  # * Alias - gain_item
  #----------------------------------------------------------------------------
  alias gain_itm_unique_rpgbi_era gain_item
  def gain_item(item, amount, include_equip = false)
    if amount > 1
      amount.times{ gain_item(item, 1, include_equip) }
      return
    end

    item = try_to_eval_unique(item, amount)
    gain_itm_unique_rpgbi_era(item, amount, include_equip=false)
  end
  #----------------------------------------------------------------------------
  # * Each unique item gets a separate slot in the db
  #----------------------------------------------------------------------------
  def try_to_eval_unique(item, amount)
    return item unless !item.nil? && item.is_unique_rpgbi
    item = Marshal.load(Marshal.dump(item))
    delete_cust_item?(item,amount) ? item.sub_fr_dbase : item.add_to_dbases
    item
  end
  #----------------------------------------------------------------------------
  # * Check to Remove Custom Item From Database
  #----------------------------------------------------------------------------
  def delete_cust_item?(item, amount)
    !item.nil? && item.valid_uniq_party_item? && -amount >= item_number(item) &&
    item.is_unique_rpgbi
  end # delete_custom?

end # Game_Party

# End of File