feat: 현재 로그인한 사용자 정보 조회 api (#110)

Author: cba700

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

@@ -2,6 +2,7 @@
 
 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;
@@ -17,6 +18,7 @@
 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;
@@ -100,4 +102,13 @@ public ResponseEntity<BaseResponse<Void>> updatePassword(
 		userService.updatePassword(request, loginUserId);
 		return BaseResponse.ok("비밀번호 변경이 완료되었습니다.", null, HttpStatus.OK);
 	}
+
+	@GetMapping("/me")
+	@Operation(summary = "현재 로그인한 사용자 정보 조회 api")
+	public ResponseEntity<BaseResponse<UserInfoResponseDto>> getCurrentUser(
+		@LoginUser Long loginUserId
+	) {
+		UserInfoResponseDto response = userService.getCurrentUserInfo(loginUserId);
+		return BaseResponse.ok("사용자 정보 조회가 완료되었습니다.", response, HttpStatus.OK);
+	}
 }

src/main/java/com/threestar/trainus/domain/user/dto/UserInfoResponseDto.java

@@ -0,0 +1,7 @@
+package com.threestar.trainus.domain.user.dto;
+
+public record UserInfoResponseDto(
+	Long userId,
+	String nickname
+) {
+}

src/main/java/com/threestar/trainus/domain/user/mapper/UserMapper.java

@@ -3,6 +3,7 @@
 import com.threestar.trainus.domain.user.dto.LoginResponseDto;
 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;
 
@@ -38,4 +39,11 @@ public static LoginResponseDto toLoginResponseDto(User user) {
 			user.getNickname()
 		);
 	}
+
+	public static UserInfoResponseDto toUserInfoResponseDto(User user) {
+		return new UserInfoResponseDto(
+			user.getId(),
+			user.getNickname()
+		);
+	}
 }

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

@@ -14,6 +14,7 @@
 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;
@@ -138,4 +139,10 @@ public void updatePassword(PasswordUpdateDto request, Long userId) {
 
 		userRepository.save(user);
 	}
+
+	@Transactional(readOnly = true)
+	public UserInfoResponseDto getCurrentUserInfo(Long userId) {
+		User user = getUserById(userId);
+		return UserMapper.toUserInfoResponseDto(user);
+	}
 }