refactor : 로그인 정보 조회 api 추가

Author: seungwookc97

cookies.txt

@@ -1,6 +1,7 @@
 package com.back.domain.user.controller;
 
 import com.back.domain.user.dto.RefreshTokenResDto;
+import com.back.domain.user.dto.UserMeResDto;
 import com.back.domain.user.service.UserAuthService;
 import com.back.global.rsData.RsData;
 import io.swagger.v3.oas.annotations.Operation;
@@ -11,6 +12,7 @@
 import jakarta.servlet.http.HttpServletResponse;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
@@ -50,4 +52,16 @@ public RsData<Void> logout(HttpServletRequest request, HttpServletResponse respo
         userAuthService.logout(request, response);
         return RsData.of(200, "로그아웃되었습니다.");
     }
+
+    @Operation(summary = "현재 로그인한 유저 정보 조회", description = "세션 유효성 검증 및 사용자 정보 반환")
+    @ApiResponses(value = {
+            @ApiResponse(responseCode = "200", description = "인증된 유저 정보 반환 성공"),
+            @ApiResponse(responseCode = "401", description = "인증되지 않은 사용자"),
+            @ApiResponse(responseCode = "500", description = "서버 내부 오류")
+    })
+    @GetMapping("/me")
+    public RsData<UserMeResDto> getCurrentUser() {
+        UserMeResDto userInfo = userAuthService.getCurrentUser();
+        return RsData.of(200, "인증된 유저 정보 반환 성공", userInfo);
+    }
 }

src/main/java/com/back/domain/user/controller/UserAuthController.java

@@ -0,0 +1,28 @@
+package com.back.domain.user.dto;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+@Builder
+public class UserMeResDto {
+    @JsonProperty("user")
+    private final UserInfo user;
+
+    @Getter
+    @Builder
+    public static class UserInfo {
+        private final String id;
+        private final String email;
+        private final String nickname;
+
+        @JsonProperty("is_first_login")
+        private final Boolean isFirstLogin;
+
+        @JsonProperty("abv_degree")
+        private final Double abvDegree;
+
+        private final String provider;
+    }
+}

src/main/java/com/back/domain/user/dto/UserMeResDto.java

@@ -1,13 +1,15 @@
 package com.back.domain.user.service;
 
 import com.back.domain.user.dto.RefreshTokenResDto;
+import com.back.domain.user.dto.UserMeResDto;
 import com.back.domain.user.entity.User;
 import com.back.domain.user.repository.UserRepository;
 import com.back.global.exception.ServiceException;
 import com.back.global.jwt.JwtUtil;
 import com.back.global.jwt.refreshToken.entity.RefreshToken;
 import com.back.global.jwt.refreshToken.repository.RefreshTokenRepository;
 import com.back.global.jwt.refreshToken.service.RefreshTokenService;
+import com.back.global.rq.Rq;
 import com.back.global.rsData.RsData;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
@@ -76,6 +78,7 @@ public class UserAuthService {
     private final UserRepository userRepository;
     private final RefreshTokenService refreshTokenService;
     private final RefreshTokenRepository refreshTokenRepository;
+    private final Rq rq;
 
     //OAuth 관련
 
@@ -211,4 +214,50 @@ public void setFirstLoginFalse(Long id) {
         Optional<User> userOpt = userRepository.findById(id);
         userOpt.ifPresent(user -> user.setFirstLogin(false));
     }
+
+    // 현재 로그인한 사용자 정보 조회 (세션 검증용)
+    public UserMeResDto getCurrentUser() {
+        try {
+            User actor = rq.getActor();
+
+            if (actor == null) {
+                log.debug("인증되지 않은 사용자");
+                throw new ServiceException(401, "인증되지 않은 사용자");
+            }
+
+            Optional<User> userOpt = userRepository.findById(actor.getId());
+            if (userOpt.isEmpty()) {
+                log.warn("사용자 ID {}를 DB에서 찾을 수 없음 (토큰은 유효하나 사용자 삭제됨)", actor.getId());
+                throw new ServiceException(401, "인증되지 않은 사용자");
+            }
+
+            User user = userOpt.get();
+            String provider = extractProvider(user.getOauthId());
+
+            return UserMeResDto.builder()
+                    .user(UserMeResDto.UserInfo.builder()
+                            .id(user.getId().toString())
+                            .email(user.getEmail())
+                            .nickname(user.getNickname())
+                            .isFirstLogin(user.isFirstLogin())
+                            .abvDegree(user.getAbvDegree())
+                            .provider(provider)
+                            .build())
+                    .build();
+
+        } catch (ServiceException e) {
+            throw e;
+        } catch (Exception e) {
+            log.error("사용자 정보 조회 중 서버 오류 발생: {}", e.getMessage(), e);
+            throw new ServiceException(500, "서버 내부 오류");
+        }
+    }
+
+    private String extractProvider(String oauthId) {
+        if (oauthId == null || oauthId.isBlank()) {
+            return "unknown";
+        }
+        String[] parts = oauthId.split("_", 2);
+        return parts.length > 0 ? parts[0] : "unknown";
+    }
 }