[LIME-122] 카카오 소셜 로그인 처리 방식 수정

lime-api/src/main/java/com/programmers/lime/domains/auth/api/AuthController.java

@@ -0,0 +1,28 @@
+package com.programmers.lime.domains.auth.api;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.programmers.lime.domains.auth.application.OAuthUserService;
+import com.programmers.lime.domains.member.api.dto.response.MemberLoginResponse;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+@RequiredArgsConstructor
+@RequestMapping("/api")
+@RestController
+public class AuthController {
+
+	private final OAuthUserService oauthUserService;
+
+	@GetMapping("/auth/kakao/callback")
+	public ResponseEntity<MemberLoginResponse> loginKakao(
+		@RequestParam final String code
+	) {
+		return ResponseEntity.ok(oauthUserService.login(code));
+	}
+}

lime-api/src/main/java/com/programmers/lime/domains/auth/application/OAuthUserService.java

@@ -0,0 +1,45 @@
+package com.programmers.lime.domains.auth.application;
+
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import com.programmers.lime.domains.auth.api.dto.KakaoMemberResponse;
+import com.programmers.lime.domains.member.api.dto.response.MemberLoginResponse;
+import com.programmers.lime.domains.member.domain.Member;
+import com.programmers.lime.domains.member.domain.vo.SocialType;
+import com.programmers.lime.domains.member.implementation.MemberAppender;
+import com.programmers.lime.domains.member.implementation.MemberReader;
+import com.programmers.lime.global.config.security.jwt.JwtService;
+
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor
+public class OAuthUserService {
+
+	private final KakaoOAuthClient kakaoOAuthClient;
+	private final MemberAppender memberAppender;
+	private final MemberReader memberReader;
+	private final JwtService jwtService;
+
+	@Transactional
+	public MemberLoginResponse login(String code) {
+		String kakaoAccessToken = kakaoOAuthClient.getAccessToken(code);
+		KakaoMemberResponse response = kakaoOAuthClient.getMemberInfo(kakaoAccessToken);
+
+		Member foundMember = memberReader.readBySocialIdAndSocialType(
+			response.id(),
+			SocialType.KAKAO
+		).orElseGet(() -> saveMember(response));
+
+		String accessToken = jwtService.generateAccessToken(String.valueOf(foundMember.getId()));
+		String refreshToken = jwtService.generateRefreshToken();
+
+		return MemberLoginResponse.from(foundMember, accessToken, refreshToken);
+	}
+
+	private Member saveMember(final KakaoMemberResponse response) {
+		return memberAppender.append(response.toEntity());
+	}
+
+}