use gift card code as provider id & return it with subscription response

Author: ashutoshgngwr

src/main/java/com/trynoice/api/subscription/SubscriptionService.java

@@ -737,7 +737,7 @@ public SubscriptionResponse redeemGiftCard(
             Subscription.builder()
                 .customer(giftCard.getCustomer())
                 .plan(giftCard.getPlan())
-                .providerSubscriptionId(String.valueOf(giftCard.getId()))
+                .providerSubscriptionId(giftCardCode)
                 .isPaymentPending(false)
                 .isAutoRenewing(false)
                 .isRefunded(false)
@@ -797,6 +797,10 @@ private static SubscriptionResponse buildSubscriptionResponse(@NonNull Subscript
             .googlePlayPurchaseToken(
                 subscription.isActive() && subscription.getPlan().getProvider() == SubscriptionPlan.Provider.GOOGLE_PLAY
                     ? subscription.getProviderSubscriptionId() : null)
+            .giftCardCode(
+                subscription.getPlan().getProvider() == SubscriptionPlan.Provider.GIFT_CARD
+                    ? subscription.getProviderSubscriptionId()
+                    : null)
             .build();
     }
 

src/main/java/com/trynoice/api/subscription/payload/SubscriptionResponse.java

@@ -57,4 +57,7 @@ public class SubscriptionResponse {
     @Schema(description = "purchase token corresponding to this subscription purchase. only present when the " +
         "subscription is active and provided by Google Play")
     private String googlePlayPurchaseToken;
+
+    @Schema(description = "the gift card code if this subscription was activated using a gift card.")
+    private String giftCardCode;
 }

src/test/java/com/trynoice/api/subscription/SubscriptionServiceTest.java

@@ -401,7 +401,8 @@ void redeemGiftCard_withValidCode() {
         val card = buildGiftCard(code, 1L);
         when(giftCardRepository.findByCode(code)).thenReturn(Optional.of(card));
         when(subscriptionRepository.save(any())).thenAnswer(i -> i.getArgument(0));
-        assertDoesNotThrow(() -> service.redeemGiftCard(1L, code));
+        val response = assertDoesNotThrow(() -> service.redeemGiftCard(1L, code));
+        assertEquals(card.getCode(), response.getGiftCardCode());
     }
 
     @Test