[FEAT] 게스트하우스 Id 기반 찜 목록 내 게스트하우스 상세정보 조회 API (#72)

src/main/java/com/sumte/guesthouse/controller/GuesthouseController.java

@@ -209,4 +209,12 @@ public ResponseEntity<ApiResponse<Page<GuesthousePreviewDTO>>> searchGuesthouse(
 
 	}
 
+	@GetMapping("/guesthouses/{guesthouseId}/summary")
+	@Operation(
+		summary = "게스트하우스 요약 조회",
+		description = "게스트하우스 ID를 기반으로 게스트하우스 상세정보를 조회합니다.")
+	public ApiResponse<GuesthouseResponseDTO.HomeCard> getGuesthouseSummary(@PathVariable Long guesthouseId) {
+		return ApiResponse.success(guesthouseQueryService.getGuesthouseSummary(guesthouseId));
+	}
+
 }

src/main/java/com/sumte/guesthouse/converter/GuesthouseConverter.java

@@ -56,4 +56,25 @@ public GuesthouseResponseDTO.HomeSummary toHomeSummary(
 			.isAd(guesthouse.getAdvertisement() == AdType.AD)
 			.build();
 	}
+
+	public GuesthouseResponseDTO.HomeCard toHomeCardResponse(
+		Guesthouse guesthouse,
+		Long minPrice,
+		String earliestCheckin,
+		Long reviewCount,
+		Double averageScore,
+		String imageUrl
+	) {
+		return GuesthouseResponseDTO.HomeCard.builder()
+			.id(guesthouse.getId())
+			.name(guesthouse.getName())
+			.addressRegion(guesthouse.getAddressRegion())
+			.addressDetail(guesthouse.getAddressDetail())
+			.minPrice(minPrice)
+			.checkin(earliestCheckin)
+			.reviewCount(reviewCount)
+			.averageScore(averageScore)
+			.imageUrl(imageUrl)
+			.build();
+	}
 }

src/main/java/com/sumte/guesthouse/dto/GuesthouseResponseDTO.java

@@ -78,4 +78,20 @@ public static class HomeSummary {
 		private boolean isAd;
 	}
 
+	@Builder
+	@Getter
+	@NoArgsConstructor
+	@AllArgsConstructor
+	public static class HomeCard {
+		private Long id;
+		private String name;
+		private String addressRegion;
+		private String addressDetail;
+		private String imageUrl;
+		private Long minPrice;
+		private String checkin;
+		private Long reviewCount;
+		private Double averageScore;
+	}
+
 }

src/main/java/com/sumte/guesthouse/repository/GuesthouseRepository.java

@@ -6,6 +6,7 @@
 import org.springframework.data.domain.Slice;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 
 import com.sumte.guesthouse.entity.Guesthouse;
 
@@ -26,4 +27,11 @@ public interface GuesthouseRepository extends JpaRepository<Guesthouse, Long> {
 
 		//리뷰는 Page로 했는데 Slice로 수정해도 괜찮을거 같음 (확인 -> 전체 요소수는 필요없으니)
 	Slice<Guesthouse> findAllOrderedForHome(Pageable pageable);
+
+	//홈카드용
+	@Query("SELECT COUNT(r) FROM Review r WHERE r.room.guesthouse.id = :guesthouseId")
+	Long countByGuesthouseId(@Param("guesthouseId") Long guesthouseId);
+
+	@Query("SELECT AVG(r.score) FROM Review r WHERE r.room.guesthouse.id = :guesthouseId")
+	Double findAverageScoreByGuesthouseId(@Param("guesthouseId") Long guesthouseId);
 }

src/main/java/com/sumte/guesthouse/service/GuesthouseQueryService.java

@@ -15,4 +15,6 @@ public interface GuesthouseQueryService {
 	Page<GuesthousePreviewDTO> getFilteredGuesthouse(GuesthouseSearchRequestDTO dto, Pageable pageable);
 
 	Slice<GuesthouseResponseDTO.HomeSummary> getGuesthousesForHome(Pageable pageable);
+
+	GuesthouseResponseDTO.HomeCard getGuesthouseSummary(Long guesthouseId);
 }

src/main/java/com/sumte/guesthouse/service/GuesthouseQueryServiceImpl.java

@@ -13,9 +13,11 @@
 import org.springframework.data.domain.Slice;
 import org.springframework.data.domain.SliceImpl;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import com.sumte.apiPayload.code.error.CommonErrorCode;
 import com.sumte.apiPayload.exception.SumteException;
+import com.sumte.guesthouse.converter.GuesthouseConverter;
 import com.sumte.guesthouse.dto.GuesthouseDetailDTO;
 import com.sumte.guesthouse.dto.GuesthousePreviewDTO;
 import com.sumte.guesthouse.dto.GuesthouseResponseDTO;
@@ -34,7 +36,6 @@
 import com.sumte.room.entity.Room;
 import com.sumte.room.repository.RoomRepository;
 
-import jakarta.transaction.Transactional;
 import lombok.RequiredArgsConstructor;
 
 @Service
@@ -48,6 +49,7 @@ public class GuesthouseQueryServiceImpl implements GuesthouseQueryService {
 	private final GuesthouseOptionServicesRepository guesthouseOptionServicesRepository;
 	private final GuesthouseRepositoryCustom guesthouseRepositoryCustom;
 	private final ImageRepository imageRepository;
+	private final GuesthouseConverter guesthouseConverter;
 
 	@Override
 	@Transactional
@@ -254,4 +256,26 @@ public Page<GuesthousePreviewDTO> getFilteredGuesthouse(GuesthouseSearchRequestD
 		// 6) PageImpl 으로 감싸서 반환
 		return new PageImpl<>(dtos, pageable, page.getTotalElements());
 	}
+
+	@Override
+	@Transactional(readOnly = true)
+	public GuesthouseResponseDTO.HomeCard getGuesthouseSummary(Long guesthouseId) {
+		Guesthouse guesthouse = guesthouseRepository.findById(guesthouseId)
+			.orElseThrow(() -> new SumteException(CommonErrorCode.NOT_EXIST));
+
+		Long minPrice = roomRepository.findMinPriceByGuesthouseId(guesthouseId);
+		String earliestCheckin = roomRepository.findEarliestCheckinByGuesthouseId(guesthouseId);
+		Long reviewCount = (long)reviewRepository.countByGuesthouseId(guesthouseId);
+		Double averageScore = reviewRepository.findAverageScoreByGuesthouseId(guesthouseId);
+
+		// 이미지
+		List<Image> images = imageRepository.findByOwnerTypeAndOwnerIdOrderBySortOrderAsc(OwnerType.GUESTHOUSE,
+			guesthouseId);
+		String imageUrl = images.isEmpty() ? null : images.get(0).getUrl();
+
+		return guesthouseConverter.toHomeCardResponse(
+			guesthouse, minPrice, earliestCheckin, reviewCount, averageScore, imageUrl
+		);
+	}
+
 }