Mr Trivel Crafting Addon - Swap craft ingredients

# ╔═════════════════════════════════════╦════════════════════╗
# ║ Title: Swap Craft                   ║  Version: 1.00     ║
# ║ Author: Roninator2                  ║                    ║
# ╠═════════════════════════════════════╬════════════════════╣
# ║ Function:                           ║   Date Created     ║
# ║ Mr Trivel Crafting -                ╠════════════════════╣
# ║ Lets you swap items in the receipe  ║    01 Nov 2020     ║
# ╚═════════════════════════════════════╩════════════════════╝
# ╔══════════════════════════════════════════════════════════╗
# ║ Allows swapped items to be returned to inventory         ║
# ║ and not used when the item is crafted.                   ║
# ║                                                          ║
# ║ Can only substitute items for items, weapons for weapons ║
# ║ The notetag is placed on the receipe ingredients         ║
# ║ not the item getting swapped in.                         ║
# ║                                                          ║
# ║ Then if the swap item is in your inventory, the          ║
# ║ original item is not used.                               ║
# ║                                                          ║
# ║ Use note tag <swap craft: X> on the item, weapon, armor  ║
# ║ x being the id of the item, weapon used for crafting     ║
# ╚══════════════════════════════════════════════════════════╝
# ╔═════════════════════════════════════╗
# ║ Terms of use:                       ║
# ║ Follow the Original Authors terms   ║
# ╚═════════════════════════════════════╝

module R2
  module Trivel_Craft
    Regex = /<swap[-_ ]craft:[-_ ]\s*(\d+)\s*>/imx
  end
end

class MrTS_Requirements_Window < Window_Base

  def set_recipe(item)
    return unless item
    @recipe = item
    @item_list = []
    @saveitem = []
    MrTS::Crafting::RECIPES[@recipe][:ingredients].each { |i|
      type = i[0].to_i
      if type == 0
        item = $data_items[i[1]]
        results = item.note.scan(R2::Trivel_Craft::Regex)
        results.each do |res|
          repitem = res[0].to_i
          if $game_party.has_item?($data_items[repitem], false)
            @item_list.delete(i)
            i = [type, repitem, 1]
            @saveitem << i
            @saveitem.uniq!
          end
        end
      end
      if type == 1
        item = $data_weapons[i[1]]
        results = item.note.scan(R2::Trivel_Craft::Regex)
        results.each do |res|
          repitem = res[0].to_i
          if $game_party.has_item?($data_weapons[repitem], false)
            @item_list.delete(i)
            i = [type, repitem, 1]
            @saveitem << i
            @saveitem.uniq!
          end
        end
      end
      if type == 2
        item = $data_armors[i[1]]
        results = item.note.scan(R2::Trivel_Craft::Regex)
        results.each do |res|
          repitem = res[0].to_i
          if $game_party.has_item?($data_armors[repitem], false)
            @item_list.delete(i)
            i = [type, repitem, 1]
            @saveitem << i
            @saveitem.uniq!
          end
        end
      end
      @item_list.push(get_true_item(i))
      @item_list.uniq!
    }
    refresh
  end

  alias r2_trivel_craft_item_83v    craft_item
  def craft_item
    r2_trivel_craft_item_83v
    @saveitem.each do |il|
      keep = get_true_item(il)
      $game_party.gain_item(keep[0], keep[1])
    end
  end

end