[feat]: 닉네임 중복체크 API 구현

src/main/java/com/onnoff/onnoff/apiPayload/code/status/ErrorStatus.java

@@ -17,6 +17,7 @@ public enum ErrorStatus implements BaseErrorCode {
 
     // 멤버 관련 에러
     USER_NOT_FOUND(HttpStatus.BAD_REQUEST, "USER4001", "사용자가 없습니다."),
+    NICKNAME_EXIST(HttpStatus.BAD_REQUEST, "USER4002", "이미 존재하는 닉네임입니다."),
 
     // 오늘의 다짐 관련 에러
     RESOLUTION_NOT_FOUND(HttpStatus.BAD_REQUEST, "RESOLUTION4001", "해당하는 오늘의 다짐이 없습니다."),

src/main/java/com/onnoff/onnoff/auth/config/WebConfig.java

@@ -40,6 +40,6 @@ public void addInterceptors(InterceptorRegistry registry) {
         registry.addInterceptor(new UserInterceptor(userService, jwtUtil))
                 .addPathPatterns("/**") // 스프링 경로는 /*와 /**이 다름
                 .excludePathPatterns("/swagger-ui/**", "/v3/api-docs/**", "/oauth2/**", "/health", "/token/**" ,
-                        "/message/**", "/enums/**");
+                        "/message/**", "/enums/**", "/users/nickname");
     }
 }

src/main/java/com/onnoff/onnoff/auth/jwt/filter/JwtAuthFilter.java

@@ -25,7 +25,7 @@
 @RequiredArgsConstructor
 public class JwtAuthFilter extends OncePerRequestFilter {
     private final JwtTokenProvider jwtTokenProvider;
-    private final static String[] ignorePrefix = {"/swagger-ui", "/v3/api-docs", "/oauth2", "/health", "/token/validate" , "/message", "/enums"};
+    private final static String[] ignorePrefix = {"/swagger-ui", "/v3/api-docs", "/oauth2", "/health", "/token/validate" , "/message", "/enums", "/users/nickname"};
     @Override
     protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
         log.info("url ={}", request.getRequestURI());

src/main/java/com/onnoff/onnoff/domain/user/controller/UserController.java

@@ -8,6 +8,7 @@
 import com.onnoff.onnoff.domain.user.dto.UserResponseDTO;
 import com.onnoff.onnoff.domain.user.service.UserService;
 import io.swagger.v3.oas.annotations.Operation;
+import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.*;
 
@@ -35,4 +36,10 @@ public ApiResponse<UserResponseDTO.UserDetailDTO> withdrawUser(){
     public ApiResponse<UserResponseDTO.UserDetailDTO> modifyUser(@RequestBody UserRequestDTO.ModifyUserDTO modifyUserDTO) {
         return ApiResponse.onSuccess(UserConverter.toUserDetailDTO(userService.modifyUser(modifyUserDTO)));
     }
+
+    @PostMapping("/nickname")
+    @Operation(summary = "닉네임 중복 체크 API")
+    public ApiResponse<String> checkNickname(@Valid @RequestBody UserRequestDTO.getNicknameDTO nicknameDTO){
+        return ApiResponse.onSuccess(userService.isExistByNickname(nicknameDTO));
+    }
 }

src/main/java/com/onnoff/onnoff/domain/user/dto/UserRequestDTO.java

@@ -4,11 +4,15 @@
 import com.onnoff.onnoff.domain.user.enums.FieldOfWork;
 import com.onnoff.onnoff.domain.user.enums.SocialType;
 import com.onnoff.onnoff.domain.user.enums.Status;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.PastOrPresent;
+import jakarta.validation.constraints.Size;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
+import java.time.LocalDate;
 import java.time.LocalDateTime;
 
 public class UserRequestDTO {
@@ -24,4 +28,10 @@ public static class ModifyUserDTO{
         private ExperienceYear experienceYear;
     }
 
+    @Getter
+    public static class getNicknameDTO{
+        @NotBlank
+        @Size(max = 10)
+        String nickname;
+    }
 }

src/main/java/com/onnoff/onnoff/domain/user/repository/UserRepository.java

@@ -12,6 +12,8 @@
 public interface UserRepository extends JpaRepository<User, Long> {
     Optional<User> findByOauthId(String oauthId);
 
+    Optional<User> findByNickname(String nickname);
+
     List<User> findByPushNotificationTimeBetween(LocalTime startTime, LocalTime endTime);
 
     List<User> findByStatusAndInactiveDateBefore(Status status, LocalDateTime oneMonthAgo);

src/main/java/com/onnoff/onnoff/domain/user/service/UserService.java

@@ -2,7 +2,6 @@
 
 import com.onnoff.onnoff.domain.user.User;
 import com.onnoff.onnoff.domain.user.dto.UserRequestDTO;
-import org.springframework.transaction.annotation.Transactional;
 
 import java.util.List;
 
@@ -15,6 +14,8 @@ public interface UserService {
 
     public boolean isExistByOauthId(String oauthId);
 
+    String isExistByNickname(UserRequestDTO.getNicknameDTO nicknameDTO);
+
     public User getUserByOauthId(String oauthId);
 
     public User withdrawUser();

src/main/java/com/onnoff/onnoff/domain/user/service/UserServiceImpl.java

@@ -45,6 +45,14 @@ public boolean isExistByOauthId(String oauthId) {
         return userRepository.findByOauthId(oauthId).isPresent();
     }
 
+    @Override
+    public String isExistByNickname(UserRequestDTO.getNicknameDTO nicknameDTO) {
+        if(userRepository.findByNickname(nicknameDTO.getNickname()).isPresent()){
+            throw new GeneralException(ErrorStatus.NICKNAME_EXIST);
+        }
+        return "사용 가능한 닉네임입니다.";
+    }
+
     @Transactional(readOnly = true)
     @Override
     public User getUserByOauthId(String oauthId) {