Add shops support.

data/plugins/shops/currency.rb

@@ -0,0 +1,35 @@
+require 'java'
+
+java_import 'org.apollo.cache.def.ItemDefinition'
+
+# A currency that can be used to purchase items in a Shop.
+class Currency
+  attr_reader :name
+
+  # Creates the Currency.
+  def initialize(id, name = ItemDefinition.lookup(id).name)
+    fail 'Currency must have a name.' if name.nil?
+    @id = id
+    @name = name.to_s
+  end
+
+  # Adds the specified amount of this `Currency` to the specified `Player`'s inventory.
+  def add(player, amount)
+    player.inventory.add(@id, amount)
+  end
+
+  # Removes the specified amount of this `Currency` from the specified `Player`'s inventory.
+  def remove(player, amount)
+    player.inventory.remove(@id, amount)
+  end
+
+  # Gets the amount of this Currency in the specified player's inventory.
+  def total(player)
+    player.inventory.get_amount(@id)
+  end
+
+  def sell_value(id)
+    (ItemDefinition.lookup(id).value * 0.60).floor
+  end
+
+end