Rpg Maker Developers Group

#==============================================================================
# ~~~ VENIMA'S SHOP MOD ~~~ Version 1.0
#==============================================================================
#  --Effects of this script:
#
#  Gives more flexibility for shops using the default Shop Processor
#   command, essentially:
#
#  Item prices become dependant on the shop (multiplied by two separate
#   variables, one for bought, one for sold).
#  Items available to sell become dependant on the shop type (shops have 
#   up to 4 types, or 3 non-types).
#------------------------------------------------------------------------------
#  --How to:
#  
#  ---Initial Preparation:
#  Step 1: Decide upon the variable ids in the module section below (line 63).
#    If you have never done this before, please seek my shop mod tutorial in 
#    the associated RPG VX forum topic.
#  Step 2: For each item/weapon/armor, enter <itemtype x> in the small
#    box labelled "Note", and replace the x with a number representing
#    its type (please look below to see an example list of types, line 96).
#    Note: items default to type -1, which is reserved for unsellable items.
#
#  ---Setting up a Shop:
#  Step 1: Create a shop process as usual with the eventing window. If you 
#    have not used the shop process command before, please seek my shop mod 
#    tutorial in the associated RPG VX forum topic.
#  Step 2: Before the shop process is called, set the shop type 
#    variables with the associated ids (ids are below, line 89).
#  Step 3: Before the shop process is called, set the buy and sell
#    price multiplers (100 is standard price).
#------------------------------------------------------------------------------
#  --Bugs FAQ
#
#  Q: All the bought/sold items in the shop are worth 0 gold! What's going on?
#  A: Your buy/sell price multipler has not been set correctly (still on 0), 
#      please refer to "Setting up a shop" Step 3.
#
#  Q: Some/all items aren't being shown in the sell section of the shop!
#  A: You may have forgotten to add the itemtype to that item, please refer
#      to "Initial Preparation" Step 2.
#  A: You may have forgotten to set which types the shop accepts, please
#      refer to "Setting up a Shop" Step 2.
#  A: SHOP_TYPE_VAR1 may be -1, if this the case, the other shop types will
#      be excluded rather than included. Please refrain from using -1 as a 
#      type for items unless they're absolutely unsellable.
#  A: The ITEMTYPE regular expression may be faulty, try replacing line 50
#      with: ITEMTYPE = /<(?:itemtype|type)[\s_]?(\d+)>/i
#------------------------------------------------------------------------------
#  --Tips
#
#  Tip: Set the buy/sell price multiplier to 100 when the game begins by 
#        placing an event on the same map as the player's starting position
#        that autoruns. Don't forget to erase the event at the end of its 
#        processing.
#  Tip: Decide upon all the item types early on and note them down below for
#        referring to later.

#==============================================================================
#  You may modify the values in the below module:
#==============================================================================

module VENIMA_SHOP_MOD
      
      # The line below is the "Regular Expression" used to determine  
      # the tag found in the item/weapon/armor Note box of the database 
      # window.
      # It currently searches for: <itemtype x> or <type x> where x is 
      # a NUMBER of your choice. You may need to modify this line if 
      # it conflicts with the expression of another mod. If you somehow 
      # break it, check the Bugs FAQ for a duplicate of the original.
      ITEMTYPE = /<(?:itemtype|type)[\s_]?(\d+)>/i
      
      # Determines the variable id to use to multiply bought item prices.
      # A value of 100 means 100% of the default price. So if an item has 
      # a value of 10, and this variable is set to 150, the price in the 
      # shop becomes 15.
      BUY_PRICE_MULTIPLIER_VAR = 1
      # Determines the variable id to use to multiply sold item prices.
      # A value of 100 means 100% of the default sell price. So if an item
      # you own has a buy value of 8, and this variable is set to 150, the
      # price in the shop becomes 6 (4 x 1.5, since sell price is 50%).
      SELL_PRICE_MULTIPLIER_VAR = 2
      
      # Determines the variable ids for deciding the shop types
      # If SHOP_TYPE_VAR1's variable value is -1, all items may be sold in
      # this shop except for those whose types are VAR2, VAR3, or VAR4.
      SHOP_TYPE_VAR1 = 3
      SHOP_TYPE_VAR2 = 4
      SHOP_TYPE_VAR3 = 5
      SHOP_TYPE_VAR4 = 6

end # VENIMA_SHOP_MOD

#==============================================================================
#  Here's the list of item types I made for reference in my game, 
#    please feel free to modify this list (note this will not make a 
#    difference in the game, it's just here to help you be organised!)
# 
#  0 = general
#  1 = weapon
#  2 = armor
#  3 = tools
#  4 = potions
#  5 = magic items
#  6 = artefacts
#
#  Example: A gold nugget item would have "<itemtype 0>" in its note box.
#==============================================================================






#==============================================================================
#
#---------------------- DO NOT EDIT BEYOND THIS POINT! ------------------------
#
#==============================================================================

class RPG::BaseItem
  
  #--------------------------------------------------------------------------
  # common cache: load_notetags_itemtype
  #--------------------------------------------------------------------------
  def load_notetags_itemtype
    @itemtype = -1
    #---
    self.note.split(/[\r\n]+/).each { |line|
    case line
    #---
    when VENIMA_SHOP_MOD::ITEMTYPE
      @itemtype = $1.to_i
    #---
    end
    } # self.note.split
    #---
  end
  
  def itemtype
    load_notetags_itemtype if @itemtype.nil?
    return @itemtype
  end
  
  def buyprice
    return (@price * $game_variables[VENIMA_SHOP_MOD::BUY_PRICE_MULTIPLIER_VAR] / 100)
  end
  
  def sellprice
    return (@price * $game_variables[VENIMA_SHOP_MOD::SELL_PRICE_MULTIPLIER_VAR] / 100)
  end

end # RPG::BaseItem

#==============================================================================
# ** Window_ShopSell
#------------------------------------------------------------------------------
#  This window displays items in possession for selling on the shop screen.
#==============================================================================

class Window_ShopSell < Window_Item
  
  #--------------------------------------------------------------------------
  # * Whether or not to include in item list
  #     item : item
  #--------------------------------------------------------------------------
  def include?(item)
    return false if item == nil
    return false if item.itemtype == -1
    
    var1 = $game_variables[VENIMA_SHOP_MOD::SHOP_TYPE_VAR1]
    var2 = $game_variables[VENIMA_SHOP_MOD::SHOP_TYPE_VAR2]
    var3 = $game_variables[VENIMA_SHOP_MOD::SHOP_TYPE_VAR3]
    var4 = $game_variables[VENIMA_SHOP_MOD::SHOP_TYPE_VAR4]
    
    if var1 == -1
      return false if var2 == item.itemtype
      return false if var3 == item.itemtype
      return false if var4 == item.itemtype
      return true
    else
      return true if var1 == item.itemtype
      return true if var2 == item.itemtype
      return true if var3 == item.itemtype
      return true if var4 == item.itemtype
      return false
    end
  end
  #--------------------------------------------------------------------------
  # * Whether or not to display in enabled state
  #     item : item
  #--------------------------------------------------------------------------
  def enable?(item)
    return (item.sellprice > 0)
  end
end


#==============================================================================
# ** Window_ShopBuy
#------------------------------------------------------------------------------
#  This window displays buyable goods on the shop screen.
#==============================================================================

class Window_ShopBuy < Window_Selectable
  #--------------------------------------------------------------------------
  # * Draw Item
  #     index : item number
  #--------------------------------------------------------------------------
  def draw_item(index)
    item = @data[index]
    number = $game_party.item_number(item)
    #modified item.price to item.buyprice
    enabled = (item.buyprice <= $game_party.gold and number < 99)
    rect = item_rect(index)
    self.contents.clear_rect(rect)
    draw_item_name(item, rect.x, rect.y, enabled)
    rect.width -= 4
    self.contents.draw_text(rect, item.buyprice, 2)
  end
end


#==============================================================================
# ** Scene_Shop
#------------------------------------------------------------------------------
#  This class performs shop screen processing.
#==============================================================================

class Scene_Shop < Scene_Base
  #--------------------------------------------------------------------------
  # * Update Buy Item Selection
  #--------------------------------------------------------------------------
  def update_buy_selection
    @status_window.item = @buy_window.item
    if Input.trigger?(Input::B)
      Sound.play_cancel
      @command_window.active = true
      @dummy_window.visible = true
      @buy_window.active = false
      @buy_window.visible = false
      @status_window.visible = false
      @status_window.item = nil
      @help_window.set_text("")
      return
    end
    if Input.trigger?(Input::C)
      @item = @buy_window.item
      number = $game_party.item_number(@item)
      if @item == nil or @item.buyprice > $game_party.gold or number == 99
        Sound.play_buzzer
      else
        Sound.play_decision
        max = @item.buyprice == 0 ? 99 : $game_party.gold / @item.buyprice
        max = [max, 99 - number].min
        @buy_window.active = false
        @buy_window.visible = false
        @number_window.set(@item, max, @item.buyprice)
        @number_window.active = true
        @number_window.visible = true
      end
    end
  end
  #--------------------------------------------------------------------------
  # * Update Sell Item Selection
  #--------------------------------------------------------------------------
  def update_sell_selection
    if Input.trigger?(Input::B)
      Sound.play_cancel
      @command_window.active = true
      @dummy_window.visible = true
      @sell_window.active = false
      @sell_window.visible = false
      @status_window.item = nil
      @help_window.set_text("")
    elsif Input.trigger?(Input::C)
      @item = @sell_window.item
      @status_window.item = @item
      if @item == nil or @item.sellprice == 0
        Sound.play_buzzer
      else
        Sound.play_decision
        max = $game_party.item_number(@item)
        @sell_window.active = false
        @sell_window.visible = false
        @number_window.set(@item, max, @item.sellprice / 2)
        @number_window.active = true
        @number_window.visible = true
        @status_window.visible = true
      end
    end
  end
  #--------------------------------------------------------------------------
  # * Confirm Number Input
  #--------------------------------------------------------------------------
  def decide_number_input
    Sound.play_shop
    @number_window.active = false
    @number_window.visible = false
    case @command_window.index
    when 0  # Buy
      $game_party.lose_gold(@number_window.number * @item.buyprice)
      $game_party.gain_item(@item, @number_window.number)
      @gold_window.refresh
      @buy_window.refresh
      @status_window.refresh
      @buy_window.active = true
      @buy_window.visible = true
    when 1  # sell
      $game_party.gain_gold(@number_window.number * (@item.sellprice / 2))
      $game_party.lose_item(@item, @number_window.number)
      @gold_window.refresh
      @sell_window.refresh
      @status_window.refresh
      @sell_window.active = true
      @sell_window.visible = true
      @status_window.visible = false
    end
  end
end