Merge pull request #14 from snabble/fix_discount_line

add missing discount line

Author: ajungg

core/src/main/java/io/snabble/sdk/ShoppingCart.java

@@ -815,6 +815,18 @@ public boolean isGiveaway() {
             return lineItem != null && lineItem.type == CheckoutApi.LineItemType.GIVEAWAY;
         }
 
+        public int getModifiedPrice() {
+            int sum = 0;
+
+            if (lineItem != null && lineItem.priceModifiers != null) {
+                for (CheckoutApi.PriceModifier priceModifier : lineItem.priceModifiers) {
+                    sum += lineItem.amount * priceModifier.price;
+                }
+            }
+
+            return sum;
+        }
+
         public String getDisplayName() {
             if (lineItem != null) {
                 return lineItem.name;

core/src/main/java/io/snabble/sdk/ShoppingCartUpdater.java

@@ -199,6 +199,7 @@ private void commitCartUpdate(int modCount, CheckoutApi.SignedCheckoutInfo signe
                             ShoppingCart.Item refersTo = cart.getByItemId(lineItem.refersTo);
                             if (refersTo != null) {
                                 refersTo.setManualCouponApplied(lineItem.redeemed);
+                                discounts += refersTo.getModifiedPrice();
                             }
                         }
                     }