Use coupon code in POSCoupon

Author: staskus

Yosemite/Yosemite/PointOfSale/POSCoupon.swift

@@ -1,4 +1,9 @@
 public struct POSCoupon: Equatable, Hashable {
     public let id: UUID
-    public let couponID: Int64
+    public let code: String
+
+    public init(id: UUID, code: String) {
+        self.id = id
+        self.code = code
+    }
 }

Yosemite/Yosemite/PointOfSale/PointOfSaleItemService.swift

@@ -125,7 +125,7 @@ public final class PointOfSaleItemService: PointOfSaleItemServiceProtocol {
 
     private func mapCouponsToPOSItems(coupons: [Coupon]) -> [POSItem] {
         coupons.compactMap { coupon in
-                .coupon(POSCoupon(id: UUID(), couponID: coupon.couponID))
+                .coupon(POSCoupon(id: UUID(), couponID: coupon.code))
         }
     }