♻️Refactor: user service 로직 인터페이스로 분리

Author: imjuyongp

src/main/java/com/be/sportizebe/domain/user/controller/UserController.java

@@ -2,7 +2,7 @@
 
 import com.be.sportizebe.domain.user.dto.request.SignUpRequest;
 import com.be.sportizebe.domain.user.dto.response.SignUpResponse;
-import com.be.sportizebe.domain.user.service.UserService;
+import com.be.sportizebe.domain.user.service.UserServiceImpl;
 import com.be.sportizebe.global.response.BaseResponse;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
@@ -21,7 +21,7 @@
 @Tag(name = "user", description = "사용자 관련 API")
 public class UserController {
 
-    private final UserService userService;
+    private final UserServiceImpl userService;
 
     @PostMapping("/signup")
     @Operation(summary = "회원가입", description = "이메일과 비밀번호로 회원가입")

src/main/java/com/be/sportizebe/domain/user/service/UserService.java

@@ -2,50 +2,8 @@
 
 import com.be.sportizebe.domain.user.dto.request.SignUpRequest;
 import com.be.sportizebe.domain.user.dto.response.SignUpResponse;
-import com.be.sportizebe.domain.user.entity.Role;
-import com.be.sportizebe.domain.user.entity.User;
-import com.be.sportizebe.domain.user.exception.UserErrorCode;
-import com.be.sportizebe.domain.user.repository.UserRepository;
-import com.be.sportizebe.global.exception.CustomException;
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.security.crypto.password.PasswordEncoder;
-import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
 
-@Service
-@Slf4j
-@RequiredArgsConstructor
-public class UserService {
+public interface UserService {
 
-    private final UserRepository userRepository;
-    private final PasswordEncoder passwordEncoder;
-
-    @Transactional
-    public SignUpResponse signUp(SignUpRequest request) {
-
-      // 사용자 아이디 중복 체크
-        if (userRepository.existsByUsername(request.username())) {
-            throw new CustomException(UserErrorCode.DUPLICATE_USERNAME);
-        }
-
-        // 사용자 닉네임 중복 체크
-      if (userRepository.existsByNickname(request.nickName())) {
-        throw new CustomException(UserErrorCode.DUPLICATE_NICKNAME);
-      }
-
-        String encodedPassword = passwordEncoder.encode(request.password());
-
-        User user = User.builder()
-          .username(request.username())
-          .password(encodedPassword)
-          .nickname(request.nickName())
-          .role(Role.USER)
-          .build();
-
-        User savedUser = userRepository.save(user);
-        log.info("새로운 사용자 생성: {}", savedUser.getUsername());
-
-        return SignUpResponse.from(savedUser);
-    }
-}
+  SignUpResponse signUp(SignUpRequest request); // 회원가입
+}

src/main/java/com/be/sportizebe/domain/user/service/UserServiceImpl.java

@@ -0,0 +1,52 @@
+package com.be.sportizebe.domain.user.service;
+
+import com.be.sportizebe.domain.user.dto.request.SignUpRequest;
+import com.be.sportizebe.domain.user.dto.response.SignUpResponse;
+import com.be.sportizebe.domain.user.entity.Role;
+import com.be.sportizebe.domain.user.entity.User;
+import com.be.sportizebe.domain.user.exception.UserErrorCode;
+import com.be.sportizebe.domain.user.repository.UserRepository;
+import com.be.sportizebe.global.exception.CustomException;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@Slf4j
+@RequiredArgsConstructor
+public class UserServiceImpl implements UserService {
+
+    private final UserRepository userRepository;
+    private final PasswordEncoder passwordEncoder;
+
+    @Override
+    @Transactional
+    public SignUpResponse signUp(SignUpRequest request) {
+
+      // 사용자 아이디 중복 체크
+        if (userRepository.existsByUsername(request.username())) {
+            throw new CustomException(UserErrorCode.DUPLICATE_USERNAME);
+        }
+
+        // 사용자 닉네임 중복 체크
+      if (userRepository.existsByNickname(request.nickName())) {
+        throw new CustomException(UserErrorCode.DUPLICATE_NICKNAME);
+      }
+
+        String encodedPassword = passwordEncoder.encode(request.password());
+
+        User user = User.builder()
+          .username(request.username())
+          .password(encodedPassword)
+          .nickname(request.nickName())
+          .role(Role.USER)
+          .build();
+
+        User savedUser = userRepository.save(user);
+        log.info("새로운 사용자 생성: {}", savedUser.getUsername());
+
+        return SignUpResponse.from(savedUser);
+    }
+}

src/main/java/com/be/sportizebe/global/s3/service/S3ServiceImpl.java

@@ -30,6 +30,7 @@ public class S3ServiceImpl implements S3Service {
 
   @Override
   public String uploadFile(PathName pathName, MultipartFile file) {
+
     validateFile(file);
 
     String fileName = createFileName(pathName, file.getOriginalFilename());