[FEAT] 리뷰 평균 점수 및 리뷰 개수 조회 API 구현

src/main/java/com/onebridge/ouch/controller/review/ReviewController.java

@@ -14,8 +14,10 @@
 import org.springframework.web.bind.annotation.RestController;
 
 import com.onebridge.ouch.apiPayload.ApiResponse;
+import com.onebridge.ouch.dto.review.ReviewAverageResponse;
 import com.onebridge.ouch.dto.review.ReviewRequest;
 import com.onebridge.ouch.dto.review.ReviewResponse;
+import com.onebridge.ouch.dto.review.ReviewStatsResponse;
 import com.onebridge.ouch.security.authorization.UserId;
 import com.onebridge.ouch.service.review.ReviewService;
 
@@ -94,4 +96,22 @@ public ResponseEntity<List<ReviewResponse>> getMyReviews(
 		List<ReviewResponse> list = reviewService.getMyReviews(userId);
 		return ResponseEntity.ok(list);
 	}
+
+	@Operation(summary = "병원 리뷰 평균 점수 조회 API", description = "특정 병원의 리뷰 평균 점수를 조회하는 API입니다.")
+	@GetMapping("/hospitals/{ykiho}/reviews/average")
+	public ResponseEntity<ReviewAverageResponse> getAverageScore(
+		@PathVariable("ykiho") String ykiho
+	) {
+		ReviewAverageResponse response = reviewService.getAverageScoreByHospital(ykiho);
+		return ResponseEntity.ok(response);
+	}
+
+	@Operation(summary = "병원 리뷰 평균 점수, 리뷰 개수 조회 API", description = "특정 병원의 리뷰 평균 점수 및 리뷰 개수를 조회하는 API입니다.")
+	@GetMapping("/hospitals/{ykiho}/reviews/stats")
+	public ResponseEntity<ReviewStatsResponse> getReviewStats(
+		@PathVariable("ykiho") String ykiho
+	) {
+		ReviewStatsResponse response = reviewService.getStatsByHospital(ykiho);
+		return ResponseEntity.ok(response);
+	}
 }

src/main/java/com/onebridge/ouch/dto/review/ReviewAverageResponse.java

@@ -0,0 +1,13 @@
+package com.onebridge.ouch.dto.review;
+
+import lombok.*;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Builder
+public class ReviewAverageResponse {
+	private String hospitalYkiho;
+	private Double averageScore;
+}

src/main/java/com/onebridge/ouch/dto/review/ReviewStatsResponse.java

@@ -0,0 +1,14 @@
+package com.onebridge.ouch.dto.review;
+
+import lombok.*;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Builder
+public class ReviewStatsResponse {
+	private String hospitalYkiho;
+	private long reviewCount;
+	private double averageScore; // 리뷰가 없으면 0.0으로 설정
+}

src/main/java/com/onebridge/ouch/repository/review/ReviewRepository.java

@@ -3,6 +3,8 @@
 import java.util.List;
 
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 
 import com.onebridge.ouch.domain.Review;
 
@@ -13,4 +15,11 @@ public interface ReviewRepository extends JpaRepository<Review, Long> {
 
 	// 특정 사용자(user.id) 기준으로 리뷰 조회
 	List<Review> findAllByUser_Id(Long userId);
+
+	// 추가: 특정 병원 리뷰의 평균 score 계산 (null일 경우 리뷰가 없는 상태)
+	@Query("SELECT AVG(r.score) FROM Review r WHERE r.hospital.ykiho = :ykiho")
+	Double findAverageScoreByHospitalYkiho(@Param("ykiho") String hospitalYkiho);
+
+	// 리뷰 개수 계산
+	long countByHospital_Ykiho(String hospitalYkiho);
 }

src/main/java/com/onebridge/ouch/service/review/ReviewService.java

@@ -3,8 +3,10 @@
 import com.onebridge.ouch.domain.Hospital;
 import com.onebridge.ouch.domain.Review;
 import com.onebridge.ouch.domain.User;
+import com.onebridge.ouch.dto.review.ReviewAverageResponse;
 import com.onebridge.ouch.dto.review.ReviewRequest;
 import com.onebridge.ouch.dto.review.ReviewResponse;
+import com.onebridge.ouch.dto.review.ReviewStatsResponse;
 import com.onebridge.ouch.repository.hospital.HospitalRepository;
 import com.onebridge.ouch.repository.review.ReviewRepository;
 import com.onebridge.ouch.repository.user.UserRepository;
@@ -120,4 +122,29 @@ private ReviewResponse toDto(Review review) {
 			.updatedAt(review.getUpdatedAt().format(dateFormatter))
 			.build();
 	}
+
+	@Transactional(readOnly = true)
+	public ReviewAverageResponse getAverageScoreByHospital(String hospitalYkiho) {
+		Double avg = reviewRepository.findAverageScoreByHospitalYkiho(hospitalYkiho);
+		// 리뷰가 하나도 없으면 avg == null이므로, 그대로 넘기거나 0.0으로 바꿀 수 있습니다.
+		return ReviewAverageResponse.builder()
+			.hospitalYkiho(hospitalYkiho)
+			.averageScore(avg)
+			.build();
+	}
+
+	@Transactional(readOnly = true)
+	public ReviewStatsResponse getStatsByHospital(String hospitalYkiho) {
+		long count = reviewRepository.countByHospital_Ykiho(hospitalYkiho);
+		Double avg = reviewRepository.findAverageScoreByHospitalYkiho(hospitalYkiho);
+
+		// 리뷰가 없으면 avg == null이므로 0.0으로 설정
+		double averageScore = (avg == null) ? 0.0 : avg;
+
+		return ReviewStatsResponse.builder()
+			.hospitalYkiho(hospitalYkiho)
+			.reviewCount(count)
+			.averageScore(averageScore)
+			.build();
+	}
 }