feat: 소셜 로그인 방식 변경

build.gradle

@@ -28,6 +28,7 @@ dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web'
 	implementation 'org.springframework.boot:spring-boot-starter-validation'
 	implementation 'org.springframework.boot:spring-boot-starter-security'
+	implementation 'org.springframework.boot:spring-boot-starter-oauth2-client'
 	testImplementation 'org.springframework.security:spring-security-test'
 	implementation 'org.springframework.cloud:spring-cloud-starter-aws:2.2.6.RELEASE'
 	implementation 'com.google.api-client:google-api-client:1.34.1'
@@ -39,7 +40,7 @@ dependencies {
 	// test
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 	testImplementation 'org.springframework.security:spring-security-test'
-	testImplementation 'org.mockito:mockito-core:5.3.1'
+	testImplementation 'org.mockitox:mockito-core:5.3.1'
 	testImplementation 'org.mockito:mockito-junit-jupiter:5.3.1'
 
 	// JWT

src/main/java/UMC_7th/Closit/domain/user/controller/UserAuthController.java

@@ -52,8 +52,32 @@ public ApiResponse<String> logout(HttpServletRequest request) {
         return ApiResponse.onSuccess("로그아웃이 완료되었습니다.");
     }
 
-    @Operation(summary = "소셜 로그인", description = "소셜 로그인 API")
-    @PostMapping("/oauth/{provider}/login")
+    @Operation(
+            summary = "소셜 로그인",
+            description = """
+                    소셜 로그인 API - 모바일 앱에서 소셜 SDK로 받은 토큰을 검증하여 로그인/회원가입을 처리.
+
+                    **지원 플랫폼:**
+                    - GOOGLE: ID Token, Access Token 모두 지원
+                    - KAKAO: Access Token만 지원
+                    - NAVER: Access Token만 지원
+
+                    **요청 예시:**
+                    ```json
+                    {
+                      "tokenType": "ACCESS_TOKEN",
+                      "token": "ya29.a0ARrdaM..."
+                    }
+                    ```
+
+                    **처리 과정:**
+                    1. 토큰을 해당 소셜 플랫폼 API로 검증
+                    2. 사용자 정보 추출 (이메일, 이름 등)
+                    3. 기존 회원이면 로그인, 신규면 자동 회원가입
+                    4. 서버 JWT 토큰 발급하여 반환
+                    """
+    )
+    @PostMapping("/oauth/login/{provider}")
     public ApiResponse<JwtResponse> socialLogin(
             @PathVariable("provider") SocialLoginType provider,
             @RequestBody @Valid OAuthLoginRequestDTO dto) {

src/main/java/UMC_7th/Closit/domain/user/dto/JwtResponse.java

@@ -1,12 +1,14 @@
 package UMC_7th.Closit.domain.user.dto;
 
 import lombok.AllArgsConstructor;
+import lombok.Builder;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
 @Data
 @AllArgsConstructor
 @NoArgsConstructor
+@Builder
 public class JwtResponse {
     private String clositId;
     private String accessToken;

src/main/java/UMC_7th/Closit/domain/user/dto/OAuthLoginRequestDTO.java

@@ -1,14 +1,49 @@
 package UMC_7th.Closit.domain.user.dto;
 
 
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
 import lombok.AllArgsConstructor;
+import lombok.Builder;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
 @Data
+@Builder
 @AllArgsConstructor
 @NoArgsConstructor
 public class OAuthLoginRequestDTO {
 
-    private String idToken;
+    /**
+     * 토큰 타입 (ID_TOKEN 또는 ACCESS_TOKEN)
+     */
+    @NotNull(message = "토큰 타입은 필수입니다.")
+    private TokenType tokenType;
+
+    /**
+     * 소셜 플랫폼에서 발급받은 토큰
+     */
+    @NotBlank(message = "토큰은 필수입니다.")
+    private String token;
+
+    /**
+     * 토큰 타입 열거형
+     */
+    public enum TokenType {
+        ID_TOKEN,       // ID Token (OpenID Connect)
+        ACCESS_TOKEN    // Access Token (OAuth 2.0)
+    }
+
+    // 기존 호환성을 위한 생성자 (deprecated)
+    @Deprecated
+    public OAuthLoginRequestDTO(String idToken) {
+        this.tokenType = TokenType.ID_TOKEN;
+        this.token = idToken;
+    }
+
+    // 기존 호환성을 위한 getter (deprecated)
+    @Deprecated
+    public String getIdToken() {
+        return tokenType == TokenType.ID_TOKEN ? token : null;
+    }
 }

src/main/java/UMC_7th/Closit/domain/user/entity/GoogleUserInfo.java

@@ -2,30 +2,52 @@
 
 
 import UMC_7th.Closit.global.common.SocialLoginType;
+import com.fasterxml.jackson.databind.JsonNode;
 import com.google.api.client.googleapis.auth.oauth2.GoogleIdToken;
 import lombok.RequiredArgsConstructor;
 
-@RequiredArgsConstructor
 public class GoogleUserInfo implements OAuthUserInfo {
     private final GoogleIdToken.Payload payload;
+    private final JsonNode userInfoJson;
+
+    // ID Token용 생성자
+    public GoogleUserInfo(GoogleIdToken.Payload payload) {
+        this.payload = payload;
+        this.userInfoJson = null;
+    }
+
+    // Access Token용 생성자
+    public GoogleUserInfo(JsonNode userInfoJson) {
+        this.payload = null;
+        this.userInfoJson = userInfoJson;
+    }
 
     @Override
-    public String providerId () {
-        return payload.getSubject();
+    public String providerId() {
+        if (payload != null) {
+            return payload.getSubject();
+        }
+        return userInfoJson.get("id").asText();
     }
 
     @Override
-    public String getEmail () {
-        return payload.getEmail();
+    public String getEmail() {
+        if (payload != null) {
+            return payload.getEmail();
+        }
+        return userInfoJson.get("email").asText();
     }
 
     @Override
-    public String getName () {
-        return payload.get("name").toString();
+    public String getName() {
+        if (payload != null) {
+            return payload.get("name").toString();
+        }
+        return userInfoJson.get("name").asText();
     }
 
     @Override
-    public SocialLoginType getProvider () {
+    public SocialLoginType getProvider() {
         return SocialLoginType.GOOGLE;
     }
 }

src/main/java/UMC_7th/Closit/domain/user/entity/KakaoUserInfo.java

@@ -0,0 +1,49 @@
+package UMC_7th.Closit.domain.user.entity;
+
+import UMC_7th.Closit.global.common.SocialLoginType;
+import com.fasterxml.jackson.databind.JsonNode;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public class KakaoUserInfo implements OAuthUserInfo {
+
+    private final JsonNode userInfoJson;
+
+    @Override
+    public String providerId() {
+        return userInfoJson.get("id").asText();
+    }
+
+    @Override
+    public String getEmail() {
+        JsonNode kakaoAccount = userInfoJson.get("kakao_account");
+        if (kakaoAccount != null && kakaoAccount.has("email")) {
+            return kakaoAccount.get("email").asText();
+        }
+        throw new IllegalStateException("카카오 계정에서 이메일 정보를 가져올 수 없습니다.");
+    }
+
+    @Override
+    public String getName() {
+        JsonNode properties = userInfoJson.get("properties");
+        if (properties != null && properties.has("nickname")) {
+            return properties.get("nickname").asText();
+        }
+
+        JsonNode kakaoAccount = userInfoJson.get("kakao_account");
+        if (kakaoAccount != null && kakaoAccount.has("profile")) {
+            JsonNode profile = kakaoAccount.get("profile");
+            if (profile.has("nickname")) {
+                return profile.get("nickname").asText();
+            }
+        }
+
+        return "카카오 사용자";
+    }
+
+    @Override
+    public SocialLoginType getProvider() {
+        return SocialLoginType.KAKAO;
+    }
+}
+

src/main/java/UMC_7th/Closit/domain/user/entity/NaverUserInfo.java

@@ -0,0 +1,49 @@
+package UMC_7th.Closit.domain.user.entity;
+
+import UMC_7th.Closit.global.common.SocialLoginType;
+import com.fasterxml.jackson.databind.JsonNode;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public class NaverUserInfo implements OAuthUserInfo {
+
+    private final JsonNode userInfoJson;
+
+    @Override
+    public String providerId() {
+        JsonNode response = userInfoJson.get("response");
+        if (response != null && response.has("id")) {
+            return response.get("id").asText();
+        }
+        throw new IllegalStateException("네이버 응답에서 사용자 ID를 가져올 수 없습니다.");
+    }
+
+    @Override
+    public String getEmail() {
+        JsonNode response = userInfoJson.get("response");
+        if (response != null && response.has("email")) {
+            return response.get("email").asText();
+        }
+        throw new IllegalStateException("네이버 계정에서 이메일 정보를 가져올 수 없습니다.");
+    }
+
+    @Override
+    public String getName() {
+        JsonNode response = userInfoJson.get("response");
+        if (response != null) {
+            if (response.has("name")) {
+                return response.get("name").asText();
+            }
+            if (response.has("nickname")) {
+                return response.get("nickname").asText();
+            }
+        }
+        return "네이버 사용자";
+    }
+
+    @Override
+    public SocialLoginType getProvider() {
+        return SocialLoginType.NAVER;
+    }
+}
+

src/main/java/UMC_7th/Closit/domain/user/service/UserAuthService.java

@@ -19,7 +19,7 @@ public interface UserAuthService {
 
     void resetPassword(String email, String newPassword);
 
-    JwtResponse socialLogin (SocialLoginType socialLoginType, OAuthLoginRequestDTO oauthLoginRequestDTO);
+    JwtResponse socialLogin (SocialLoginType socialLoginType, OAuthLoginRequestDTO oauth2LoginRequestDTO);
 
     void logout (String accessToken);
 }