feat: 마이페이지(수혜자) 조회 구현

- 수혜자의 마이페이지 조회를 구현하였습니다.

src/main/java/zero/eight/donut/controller/MypageController.java

@@ -17,4 +17,9 @@ public class MypageController {
     public ApiResponse<?> giverInfo() {
         return mypageService.getGiverMypage();
     }
+
+    @GetMapping("/receiver")
+    public ApiResponse<?> receiverInfo() {
+        return mypageService.getReceiverMypage();
+    }
 }

src/main/java/zero/eight/donut/dto/ReceiverInfoResponseDto.java

@@ -0,0 +1,8 @@
+package zero.eight.donut.dto;
+
+import lombok.Builder;
+
+@Builder
+public class ReceiverInfoResponseDto {
+    private double total;
+}

src/main/java/zero/eight/donut/exception/Success.java

@@ -13,6 +13,7 @@ public enum Success {
     SUCCESS(HttpStatus.OK, "Request successfully processed"),
 
     // 200 OK SUCCESS
+    MYPAGE_RECEIVER_SUCCESS(HttpStatus.OK, "Get request for receiver's info completed successfully"),
     MYPAGE_GIVER_SUCCESS(HttpStatus.OK, "Get request for giver's info completed successfully"),
     GET_WALLET_SUCCESS(HttpStatus.OK, "Success in getting wallet info"),
     HOME_GIVER_SUCCESS(HttpStatus.OK, "Get request for giver's home info completed successfully"),

src/main/java/zero/eight/donut/repository/BenefitRepository.java

@@ -2,6 +2,7 @@
 
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 import zero.eight.donut.domain.Benefit;
 import zero.eight.donut.domain.Receiver;
@@ -13,4 +14,7 @@ public interface BenefitRepository extends JpaRepository<Benefit, Long> {
 
     @Query("SELECT b FROM Benefit b  WHERE b.receiver.id =?1 AND b.year = ?2 AND b.month= ?3")
     Benefit findByReceiverIdAndThisMonth(Long receiverId, Integer year, Integer month);
+
+    @Query(value = "SELECT SUM(b.sum) FROM benefit b WHERE b.receiver_id = :receiverId", nativeQuery = true)
+    Integer sumBenefitByReceiverId(@Param("receiverId") Long receiverId);
 }

src/main/java/zero/eight/donut/service/MypageService.java

@@ -5,14 +5,13 @@
 import zero.eight.donut.common.response.ApiResponse;
 import zero.eight.donut.config.jwt.AuthUtils;
 import zero.eight.donut.domain.Giver;
+import zero.eight.donut.domain.Receiver;
+import zero.eight.donut.dto.ReceiverInfoResponseDto;
 import zero.eight.donut.dto.home.giver.GiverHomeResponseDto;
 import zero.eight.donut.dto.mypage.GiverInfoResponseDto;
 import zero.eight.donut.dto.mypage.StatsDto;
 import zero.eight.donut.exception.Success;
-import zero.eight.donut.repository.DonationInfoRepository;
-import zero.eight.donut.repository.DonationRepository;
-import zero.eight.donut.repository.GiftRepository;
-import zero.eight.donut.repository.MessageRepository;
+import zero.eight.donut.repository.*;
 
 import java.time.Duration;
 import java.time.LocalDateTime;
@@ -26,6 +25,7 @@ public class MypageService {
     private final DonationRepository donationRepository;
     private final DonationInfoRepository donationInfoRepository;
     private final MessageRepository messageRepository;
+    private final BenefitRepository benefitRepository;
 
     public ApiResponse<?> getGiverMypage() {
         // 기부 기간(연) 계산
@@ -57,6 +57,7 @@ public ApiResponse<?> getGiverMypage() {
                 .received(received)
                 .msg(msg)
                 .build();
+
         GiverInfoResponseDto responseDto = GiverInfoResponseDto.builder()
                 .years(years)
                 .donation(donation)
@@ -65,4 +66,21 @@ public ApiResponse<?> getGiverMypage() {
 
         return ApiResponse.success(Success.MYPAGE_GIVER_SUCCESS, responseDto);
     }
+
+    public ApiResponse<?> getReceiverMypage() {
+        // 수혜 금액 계산
+        Receiver receiver = authUtils.getReceiver();
+        double total = 0d;
+        Integer summed = benefitRepository.sumBenefitByReceiverId(receiver.getId());
+        if (summed != null) {
+            total = summed.doubleValue();
+        }
+
+        // DTO 생성 및 반환
+        ReceiverInfoResponseDto responseDto = ReceiverInfoResponseDto.builder()
+                .total(total)
+                .build();
+
+        return ApiResponse.success(Success.MYPAGE_RECEIVER_SUCCESS, responseDto);
+    }
 }