feat kookmin-sw#2 - OAuth2UserService 기능 구현

로그인 시 카카오 혹은 네이버에서 받아온 사용자 정보를 이용하여 회원가입이 안되어있는 사용자의 경우 save 시키고, 이미 가입된 회원이라면 SharedPostPrincipal 객체 반환하도록 함

src/main/java/org/capstone/maru/security/CustomOAuth2UserService.java

@@ -1,14 +1,8 @@
-package org.capstone.maru.service;
+package org.capstone.maru.security;
 
-import java.util.Collections;
-import java.util.Map;
 import lombok.RequiredArgsConstructor;
-import org.capstone.maru.domain.MemberAccount;
-import org.capstone.maru.dto.CustomOAuth2User;
-import org.capstone.maru.dto.OAuthAttributes;
-import org.capstone.maru.dto.SocialType;
-import org.capstone.maru.repository.MemberAccountRepository;
-import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.capstone.maru.security.constant.SocialType;
+import org.capstone.maru.service.MemberAccountService;
 import org.springframework.security.oauth2.client.userinfo.DefaultOAuth2UserService;
 import org.springframework.security.oauth2.client.userinfo.OAuth2UserRequest;
 import org.springframework.security.oauth2.client.userinfo.OAuth2UserService;
@@ -20,70 +14,42 @@
 @Service
 public class CustomOAuth2UserService implements OAuth2UserService<OAuth2UserRequest, OAuth2User> {
 
-    private final MemberAccountRepository userRepository;
-    private static final String NAVER = "naver";
-    private static final String KAKAO = "kakao";
+    private final MemberAccountService memberAccountService;
 
     @Override
     public OAuth2User loadUser(OAuth2UserRequest userRequest) throws OAuth2AuthenticationException {
-
         OAuth2UserService<OAuth2UserRequest, OAuth2User> delegate = new DefaultOAuth2UserService();
         OAuth2User oAuth2User = delegate.loadUser(userRequest);
 
-        /**
-         * userRequest에서 registrationId 추출 후 registrationId으로 SocialType 저장
-         * http://localhost:8080/oauth2/authorization/kakao에서 kakao가 registrationId
-         * userNameAttributeName은 이후에 nameAttributeKey로 설정된다.
-         */
         String registrationId = userRequest.getClientRegistration().getRegistrationId();
         SocialType socialType = getSocialType(registrationId);
-        String userNameAttributeName = userRequest.getClientRegistration()
-            .getProviderDetails().getUserInfoEndpoint()
-            .getUserNameAttributeName(); // OAuth2 로그인 시 키(PK)가 되는 값
-        Map<String, Object> attributes = oAuth2User.getAttributes(); // 소셜 로그인에서 API가 제공하는 userInfo의 Json 값(유저 정보들)
-
-        // socialType에 따라 유저 정보를 통해 OAuthAttributes 객체 생성
-        OAuthAttributes extractAttributes = OAuthAttributes.of(socialType, userNameAttributeName,
-            attributes);
 
-        MemberAccount createdUser = getUser(extractAttributes, socialType);
-
-        // DefaultOAuth2User를 구현한 CustomOAuth2User 객체를 생성해서 반환
-        return new CustomOAuth2User(
-            Collections.singleton(new SimpleGrantedAuthority(createdUser.getRole().getKey())),
-            attributes,
-            extractAttributes.getNameAttributeKey(),
-            createdUser.getEmail()
+        OAuth2Response extractAttributes = OAuth2Response.of(
+            socialType,
+            oAuth2User.getAttributes()
         );
-    }
 
-    private SocialType getSocialType(String registrationId) {
-        if (NAVER.equals(registrationId)) {
-            return SocialType.NAVER;
-        }
-        if (KAKAO.equals(registrationId)) {
-            return SocialType.KAKAO;
-        }
-        return null;
+        String memberId = getMemberId(registrationId, extractAttributes);
+
+        return memberAccountService
+            .searchMember(memberId)
+            .map(SharedPostPrincipal::from)
+            .orElseGet(() ->
+                SharedPostPrincipal.from(
+                    memberAccountService.saveUser(
+                        memberId,
+                        extractAttributes.email(),
+                        extractAttributes.nickname()
+                    )
+                )
+            );
     }
 
-    private MemberAccount getUser(OAuthAttributes attributes, SocialType socialType) {
-        MemberAccount findUser = userRepository.findBySocialTypeAndSocialId(socialType,
-            attributes.getOauth2UserInfo().getId()).orElse(null);
-
-        if (findUser == null) {
-            return saveUser(attributes, socialType);
-        }
-        return findUser;
+    private SocialType getSocialType(String registrationId) {
+        return SocialType.of(registrationId);
     }
 
-    /**
-     * OAuthAttributes의 toEntity() 메소드를 통해 빌더로 User 객체 생성 후 반환 생성된 User 객체를 DB에 저장 : socialType,
-     * socialId, email, role 값만 있는 상태
-     */
-    private MemberAccount saveUser(OAuthAttributes attributes, SocialType socialType) {
-        MemberAccount createdUser = attributes.toEntity(socialType, attributes.getOauth2UserInfo());
-        return userRepository.save(createdUser);
+    private String getMemberId(String registrationId, OAuth2Response oAuth2Response) {
+        return registrationId + "_" + oAuth2Response.id();
     }
-
 }