RPGXP - ENG - Multiusable items

#==============================================================================
# Multiusable items
# By gerkrt/gerrtunk
# Version: 1.5
# License: GPL, credits
#==============================================================================
=begin

--------Instructions-----------

Just add new items in the variable Multiusable_items. You have to do this to
add a new item every time.

Ex: If you wanted to add the item number 5 of the database with 3 uses:

Multiusable_items = {1=>3, 3=>2, 5=>3}

First goes the item id, then the uses. Note that you can remove the two examples
i have add:

Multiusable_items = {5=>3}

This works like in old Rpgmakers. Internally it will be used the item with less
number of uses left.

----------Options-------------

Show_uses: If you turn this option on it will add to every multiusable descriptions
the number of uses left, example:

Super Potion
Description: 2/2 uses. Recovers 300 HP.

Uses_text: You can modify here the text that is add before the uses ratio.


----------Compatibality-------------

The show uses option modifies the shop and item menu, if you have some script
that changue that it can give you problems. Turn this option off if something goes
wrong.

=end

module Wep
    # By uses. {Item_id=> number of uses}
    Multiusable_items = {1=>3, 3=>2}
    Show_uses = true
    Uses_text = ' uses. '
end

class Game_Party
   attr_reader :multiusable_items
   alias wep_gm_par_init initialize
   def initialize
     wep_gm_par_init
     @multiusable_items = []
  end

  #--------------------------------------------------------------------------
  # * Gain Items (or lose)
  #     item_id : item ID
  #     n       : quantity
  #--------------------------------------------------------------------------
  def gain_item(item_id, n)
    # Update quantity data in the hash.
    if item_id > 0
     # Check if multiusable
     if multiusable?(item_id) and n > 0
       for i in 0...n
        # Push a new item with uses and item id
        uses = Wep::Multiusable_items[item_id]
        @multiusable_items.push([item_id,uses])
       end
      end
      @items[item_id] = [[item_number(item_id) + n, 0].max, 99].min
    end
  end

  #--------------------------------------------------------------------------
  # * Lose Items
  #     item_id : item ID
  #     n       : quantity
  #--------------------------------------------------------------------------
  def lose_item(item_id, n)
     if multiusable?(item_id) and have_multiusables?(item_id) and not $scene.is_a?(Scene_Shop)
       # Sort by uses
       @multiusable_items.sort! {|a,b|a[1]<=> b[1]}
       # Iterate over all items in search of what have the lowest uses
       i=0
       for item in @multiusable_items
        if item[0] == item_id
          @multiusable_items[i][1]-=1
          # If have no more uses, delete it
          if @multiusable_items[i][1] == 0
           @multiusable_items.delete(item)
           @items[item_id] = [[item_number(item_id) -1, 0].max, 99].min
         end
         break
       end
       i+=1
       end
      elsif $scene.is_a?(Scene_Shop) and multiusable?(item_id)
        i=0
        to_lose = n
        @multiusable_items.sort! {|a,b|a[1]<=> b[1]}
        for item in @multiusable_items
          if to_lose == 0
            break
          end
          if item[0] == item_id
             @multiusable_items.delete_at(i)
             to_lose-=1
          end
          i+=1
        end
        @items[item_id] = [[item_number(item_id) -n, 0].max, 99].min
       else
       # Reverse the numerical value and call it gain_item
        gain_item(item_id, -n)
      end
    end

  #--------------------------------------------------------------------------
  # * Have Multiusables?
  #--------------------------------------------------------------------------
  def have_multiusables?(item_id)
       for item in @multiusable_items
         if item[0] == item_id
           return true
         end
       end
      return false
  end

  #--------------------------------------------------------------------------
  # * Multiusables?
  #--------------------------------------------------------------------------
  def multiusable?(item_id)
    return Wep::Multiusable_items[item_id]
  end
end

if Wep::Show_uses
  class Window_Item < Window_Selectable
    #--------------------------------------------------------------------------
    # * Help Text Update
    #--------------------------------------------------------------------------
    def update_help
      if Wep::Multiusable_items[self.item.id]
        for item in $game_party.multiusable_items
         if item[0] == self.item.id
           uses=item[1]
           break
         end
       end
        description = uses.to_s+'/'+Wep::Multiusable_items[self.item.id].to_s+Wep::Uses_text+self.item.description
        @help_window.set_text(description)
      else
        @help_window.set_text(self.item == nil ? "" : self.item.description)
      end
    end
  end

  class Window_ShopSell < Window_Selectable
    #--------------------------------------------------------------------------
    # * Help Text Update
    #--------------------------------------------------------------------------
    def update_help
      if Wep::Multiusable_items[self.item.id]
        for item in $game_party.multiusable_items
         if item[0] == self.item.id
           uses=item[1]
           break
         end
       end
        description = uses.to_s+'/'+Wep::Multiusable_items[self.item.id].to_s+Wep::Uses_text+self.item.description
        @help_window.set_text(description)
      else
        @help_window.set_text(self.item == nil ? "" : self.item.description)
      end
    end
  end
end