[Refactor] 혜택 로직 관련 리펙토링

src/main/java/savepay/savepay/domain/discount/controller/DiscountController.java

@@ -30,7 +30,7 @@ public ApiResponse<String> createDiscount(@RequestBody DiscountRequestDto.toDisc
     }
 
     @PostMapping("/discounts")
-    @Operation(summary = "유저 등록수단별 혜택 반환 API", description = "카드/페이/통신사별 혜택 리스트를 모두 반환하는 메서드")
+    @Operation(summary = "유저 검색어에 따른 등록수단별 혜택 반환 API", description = "카드/페이/통신사별 혜택 리스트를 모두 반환하는 메서드")
     public ApiResponse<List<DiscountResponseDto.DiscountInfo>> getAllDiscounts(@UserInjection User user,
                                                                                @RequestBody DiscountRequestDto.toBrandNameDto request) {
         return ApiResponse.onSuccess(discountQueryService.getAllDiscounts(user, request));

src/main/java/savepay/savepay/domain/discount/converter/DiscountConverter.java

@@ -1,3 +1,4 @@
+
 package savepay.savepay.domain.discount.converter;
 
 import savepay.savepay.domain.discount.dto.DiscountResponseDto;
@@ -16,6 +17,7 @@ public static DiscountResponseDto.DiscountInfo toDiscountInfoDto(Discount discou
                 .pointInfo(discount.getPointInfo())
                 .details(discount.getDetails())
                 .createdAt(discount.getCreatedAt())
+                .source(DiscountInfoHelper.resolveSource(discount))
                 .build();
     }
 }

src/main/java/savepay/savepay/domain/discount/converter/DiscountInfoHelper.java

@@ -0,0 +1,22 @@
+package savepay.savepay.domain.discount.converter;
+
+import org.hibernate.Hibernate;
+import savepay.savepay.domain.discount.entity.Discount;
+import savepay.savepay.domain.payment.entity.Payment;
+import savepay.savepay.domain.payment.entity.card.entity.Card;
+import savepay.savepay.domain.payment.entity.pay.entity.Pay;
+
+public class DiscountInfoHelper {
+
+    public static String resolveSource(Discount discount) {
+        if (discount.getTelecom() != null) return "TELECOM";
+        Payment payment = discount.getPayment();
+        if (payment != null) {
+            Class<?> actualClass = Hibernate.getClass(payment);
+
+            if (Card.class.isAssignableFrom(actualClass)) return "CARD";
+            if (Pay.class.isAssignableFrom(actualClass)) return "PAY";
+        }
+        return "UNKNOWN";
+    }
+}

src/main/java/savepay/savepay/domain/discount/dto/DiscountResponseDto.java

@@ -19,6 +19,6 @@ public static class DiscountInfo {
         String details; //혜택방법 상세
         String pointInfo; // 포인트 정보
         LocalDateTime createdAt;
-
+        String source;
     }
 }