offer.rb in kosher-0.9.1

- old
+ new
@@ -1,37 +1,35 @@
 module Kosher
-
-  # An offer.
   class Offer < Structure
+    include ActiveModel::Validations
     include Comparable
 
-    key     :id
-    has_one :venue
-    has_one :item
-    has_one :seller
-    has_one :shipping
+    key :id
+    one :seller
+    one :shipping
+    one :unit
+    key :venue_id, Integer
 
-    # Compares offer with another offer.
-    #
-    # A kosher offer is better than an unkosher offer. If both offers are
-    # kosher or unkosher, a lower-priced offer is better.
+    validates_presence_of :seller, :shipping, :unit, :venue
+
     def <=>(other)
       if kosher? != other.kosher?
         kosher? ? -1 : 1
       else
-        price <=> other.price
+        total <=> other.total
       end
     end
 
-    # Returns whether the offer is kosher.
-    #
-    # An offer is kosher if its item, seller, and shipping are kosher.
     def kosher?
-      item.kosher? && seller.kosher? && shipping.kosher?
+      raise Invalid.new(self) unless valid?
+      seller.kosher? && shipping.kosher? && unit.kosher?
     end
 
-    # The total price of an offer.
     def price
-      item.price.to_money + shipping.cost.to_money
+      unit.price + shipping.cost
+    end
+
+    def venue
+      Venue.find(venue_id)
     end
   end
 end