BaseItem Level Requirements

#==============================================================================
# BaseItem Level Requirements
# Version 1.1
# By Szyu
#
# About:
# Get level requirements for weapon/armor equipment and item usage
#
# Instructions:
# - Place below "▼ Materials" but above "▼ Main Process".
#
# How to Use:
# Add "<rlvl: x>" to the notes of an item, weapon, armor to set the required level to x
#==============================================================
#   * Configuration
#==============================================================

# Shows the level requirements in the item description
SHOW_LVL_REQ_IN_DESCRIPTION = true
# Term for item description
DESCRIPTION_LVL_REQ_TERM = "Lv: "

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#==============================================================
#   * Game_BattlerBase
#==============================================================
class Game_BattlerBase
  attr_reader   :level

  alias equippable_lvl_req equippable?
  def equippable?(item)
    result = equippable_lvl_req(item)
    return false if item.nil?
    if (!item.required_level.nil?)
      return false if @level < item.required_level
    end
    return result
  end

  alias usable_lvl_req usable_item_conditions_met?
  def usable_item_conditions_met?(item)
    result = usable_lvl_req(item)
    return false if item.nil?
    if (!item.required_level.nil?)
      return false if @level < item.required_level
    end
    return result
  end
end

#==============================================================
#   * DataManager
#==============================================================
class << DataManager
  alias load_lv_rq_sz_crafting load_database

  def load_database
    load_lv_rq_sz_crafting
    load_lvl_req_item_notetags
  end

  def load_lvl_req_item_notetags
    groups = [$data_items, $data_weapons, $data_armors]
    for group in groups
      for obj in group
        next if obj.nil?
        obj.load_lvl_requirements
      end
    end
  end
end

#==============================================================
#   * BaseItems
#==============================================================
class RPG::BaseItem
  attr_accessor :required_level


  def load_lvl_requirements
    @required_level = 1
    self.note.split(/[\r\n]+/).each do |line|
      next unless line =~ /<rlvl:\s*?(\d*)>/i
      @required_level = $1.to_i
      @description += sprintf("(%s%d)", DESCRIPTION_LVL_REQ_TERM, @required_level) if SHOW_LVL_REQ_IN_DESCRIPTION
    end
  end
end