[♻️ refactor/#101]: SignUpService 클래스 제거 및 AuthService에 회원가입 로직 통합

- `SignUpService` 클래스를 제거하고, 해당 로직을 `AuthService`로 통합하였습니다.
- `AuthController`에서 `SignUpService`를 호출하던 부분을 `AuthService` 호출로 수정하였습니다.
- 코드 중복을 줄이고, 회원가입 로직을 `AuthService`로 일원화하여 서비스 구조를 단순화하였습니다.

src/main/java/org/terning/terningserver/controller/AuthController.java

@@ -17,7 +17,6 @@
 import org.terning.terningserver.exception.dto.SuccessResponse;
 import org.terning.terningserver.service.AuthService;
 import org.terning.terningserver.service.SignUpFilterService;
-import org.terning.terningserver.service.SignUpService;
 
 import static org.terning.terningserver.exception.enums.SuccessMessage.*;
 
@@ -28,7 +27,6 @@
 public class AuthController implements AuthSwagger {
 
     private final AuthService authService;
-    private final SignUpService signUpService;
     private final SignUpFilterService signUpFilterService;
 
     @PostMapping("/sign-in")
@@ -56,7 +54,7 @@ public ResponseEntity<SuccessResponse<SignUpResponseDto>> signUp(
             @RequestBody SignUpRequestDto request
     ) {
 
-        SignUpResponseDto signUpResponseDto = signUpService.signUp(authId, request.name(), request.profileImage(), request.authType());
+        SignUpResponseDto signUpResponseDto = authService.signUp(authId, request.name(), request.profileImage(), request.authType());
         return ResponseEntity.ok(SuccessResponse.of(SUCCESS_SIGN_UP, signUpResponseDto));
     }
 

src/main/java/org/terning/terningserver/service/AuthService.java

@@ -1,13 +1,17 @@
 package org.terning.terningserver.service;
 
+import org.terning.terningserver.domain.enums.AuthType;
 import org.terning.terningserver.dto.auth.request.SignInRequestDto;
 import org.terning.terningserver.dto.auth.response.AccessTokenGetResponseDto;
 import org.terning.terningserver.dto.auth.response.SignInResponseDto;
+import org.terning.terningserver.dto.auth.response.SignUpResponseDto;
 
 public interface AuthService {
 
     SignInResponseDto signIn(String authAccessToken, SignInRequestDto request);
 
+    SignUpResponseDto signUp(String authId, String name, Integer profileImage, AuthType authType);
+
     void signOut(long userId);
 
     void withdraw(long userId);

src/main/java/org/terning/terningserver/service/AuthServiceImpl.java

@@ -13,6 +13,7 @@
 import org.terning.terningserver.dto.auth.response.AccessTokenGetResponseDto;
 import org.terning.terningserver.dto.auth.response.SignInResponseDto;
 import org.terning.terningserver.domain.enums.AuthType;
+import org.terning.terningserver.dto.auth.response.SignUpResponseDto;
 import org.terning.terningserver.exception.CustomException;
 import org.terning.terningserver.jwt.JwtTokenProvider;
 import org.terning.terningserver.jwt.UserAuthentication;
@@ -57,11 +58,19 @@ public SignInResponseDto signIn(String authAccessToken, SignInRequestDto request
     }
 
     @Transactional
-    public User saveUser(SignInRequestDto request) {
-        User user = User.builder()
-                .authType(request.authType())
-                .build();
-        return userRepository.save(user);
+    public SignUpResponseDto signUp(String authId, String name, Integer profileImage, AuthType authType) {
+
+        User user = userRepository.save(User.builder()
+                .authId(authId)
+                .name(name)
+                .authType(authType)
+                .profileImage(profileImage)
+                .build());
+
+        Token token = getToken(user);
+        userRepository.save(user);
+
+        return SignUpResponseDto.of(token.getAccessToken(), token.getRefreshToken(), user.getId(), authType);
     }
 
     @Override