feat: 회원탈퇴 기능 구현

src/main/java/com/threestar/trainus/domain/comment/repository/CommentRepository.java

@@ -15,21 +15,38 @@ public interface CommentRepository extends JpaRepository<Comment, Long> {
 	@Query(value = """
 		select comments.comment_id, comments.lesson_id, comments.user_id, comments.content, 
 		comments.parent_comment_id, comments.deleted, comments.created_at, comments.updated_at  
-		from ( select comment_id from comments where lesson_id = :lessonId order by parent_comment_id asc, comment_id asc limit :limit offset :offset 
+		from ( 
+		    select comment_id 
+		    from comments c
+		    join users u on c.user_id = u.id and u.deleted_at IS NULL
+		    where lesson_id = :lessonId 
+		    order by parent_comment_id asc, comment_id asc 
+		    limit :limit offset :offset 
 		) t left join comments on t.comment_id = comments.comment_id
 		""", nativeQuery = true)
 	List<Comment> findAll(@Param("lessonId") Long lessonId, @Param("offset") int offset, @Param("limit") int limit);
 
 	@Query(value = """
-		select count(*) from ( select comment_id from comments where lesson_id = :lessonId limit :limit) t
+		select count(*) from ( 
+		    select comment_id 
+		    from comments c
+		    join users u on c.user_id = u.id and u.deleted_at IS NULL
+		    where lesson_id = :lessonId 
+		    limit :limit
+		) t
 		""", nativeQuery = true)
 	Integer count(@Param("lessonId") Long lessonId, @Param("limit") int limit);
 
 	@Query(value = """
-		select count(*) from (select comment_id from comments where lesson_id = :lessonId and parent_comment_id = :parentCommentId limit :limit) t
+		select count(*) from (
+		    select comment_id 
+		    from comments c
+		    join users u on c.user_id = u.id and u.deleted_at IS NULL
+		    where lesson_id = :lessonId and parent_comment_id = :parentCommentId 
+		    limit :limit
+		) t
 		""", nativeQuery = true)
-	Long countBy(@Param("lessonId") Long lessonId, @Param("parentCommentId") Long parentCommentId,
-		@Param("limit") int limit);
+	Long countBy(@Param("lessonId") Long lessonId, @Param("parentCommentId") Long parentCommentId, @Param("limit") int limit);
 
 	Optional<Comment> findByCommentIdAndUserId(Long commentId, Long userId);
 

src/main/java/com/threestar/trainus/domain/review/repository/ReviewRepository.java

@@ -15,7 +15,14 @@ public interface ReviewRepository extends JpaRepository<Review, Long> {
 	boolean existsByReviewer_IdAndLessonId(Long reviewerId, Long lessonId);
 
 	@Query(value = """
-		select count(*) from (select review_id from reviews where reviewee_id = :userId limit :limit ) t
+		SELECT COUNT(*) FROM (
+		    SELECT r.review_id 
+		    FROM reviews r 
+		    JOIN users u1 ON r.reviewee_id = u1.id AND u1.deleted_at IS NULL
+		    JOIN users u2 ON r.reviewer_id = u2.id AND u2.deleted_at IS NULL
+		    WHERE r.reviewee_id = :userId 
+		    LIMIT :limit
+		) t
 		""", nativeQuery = true)
 	Integer count(
 		@Param("userId") Long userId,

src/main/java/com/threestar/trainus/domain/user/controller/UserController.java

@@ -2,7 +2,6 @@
 
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PatchMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
@@ -18,7 +17,6 @@
 import com.threestar.trainus.domain.user.dto.PasswordUpdateDto;
 import com.threestar.trainus.domain.user.dto.SignupRequestDto;
 import com.threestar.trainus.domain.user.dto.SignupResponseDto;
-import com.threestar.trainus.domain.user.dto.UserInfoResponseDto;
 import com.threestar.trainus.domain.user.service.EmailVerificationService;
 import com.threestar.trainus.domain.user.service.UserService;
 import com.threestar.trainus.global.annotation.LoginUser;
@@ -111,4 +109,13 @@ public ResponseEntity<BaseResponse<UserInfoResponseDto>> getCurrentUser(
 		UserInfoResponseDto response = userService.getCurrentUserInfo(loginUserId);
 		return BaseResponse.ok("사용자 정보 조회가 완료되었습니다.", response, HttpStatus.OK);
 	}
+
+	@DeleteMapping("/withdraw")
+	@Operation(summary = "회원탈퇴 api")
+	public ResponseEntity<BaseResponse<Void>> withdraw(
+		@LoginUser Long loginUserId
+	) {
+		userService.withdraw(loginUserId);
+		return BaseResponse.okOnlyStatus(HttpStatus.NO_CONTENT);
+	}
 }

src/main/java/com/threestar/trainus/domain/user/entity/User.java

@@ -4,6 +4,8 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import org.hibernate.annotations.SQLRestriction;
+
 import com.threestar.trainus.domain.coupon.user.entity.UserCoupon;
 import com.threestar.trainus.domain.metadata.entity.ProfileMetadata;
 import com.threestar.trainus.domain.profile.entity.Profile;
@@ -32,6 +34,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 @Builder
 @AllArgsConstructor
+@SQLRestriction("deleted_at IS NULL") //삭제되지 않은 데이터만 기본적으로 조회하는 필터
 public class User extends BaseDateEntity {
 
 	@Id
@@ -65,4 +68,8 @@ public class User extends BaseDateEntity {
 	public void updatePassword(String newPassword) {
 		this.password = newPassword;
 	}
+
+	public void withdraw() {
+		this.deletedAt = LocalDateTime.now();
+	}
 }

src/main/java/com/threestar/trainus/domain/user/repository/UserRepository.java

@@ -13,10 +13,4 @@ public interface UserRepository extends JpaRepository<User, Long> {
 	boolean existsByNickname(String nickname);
 
 	Optional<User> findByEmail(String email);
-
-	// 닉네임으로 사용자 찾기
-	Optional<User> findByNickname(String nickname);
-
-	// 삭제되지 않은 사용자만 조회
-	Optional<User> findByIdAndDeletedAtIsNull(Long id);
 }

src/main/java/com/threestar/trainus/domain/user/service/UserService.java

@@ -14,7 +14,6 @@
 import com.threestar.trainus.domain.user.dto.PasswordUpdateDto;
 import com.threestar.trainus.domain.user.dto.SignupRequestDto;
 import com.threestar.trainus.domain.user.dto.SignupResponseDto;
-import com.threestar.trainus.domain.user.dto.UserInfoResponseDto;
 import com.threestar.trainus.domain.user.entity.User;
 import com.threestar.trainus.domain.user.entity.UserRole;
 import com.threestar.trainus.domain.user.mapper.UserMapper;
@@ -140,6 +139,13 @@ public void updatePassword(PasswordUpdateDto request, Long userId) {
 		userRepository.save(user);
 	}
 
+	@Transactional
+	public void withdraw(Long userId) {
+		User user = getUserById(userId);
+
+		user.withdraw();
+	}
+
 	@Transactional(readOnly = true)
 	public UserInfoResponseDto getCurrentUserInfo(Long userId) {
 		User user = getUserById(userId);