[Feat]: 네이버 로그인 추가 (#4)

zzansuni-api-server/app/src/main/java/org/haedal/zzansuni/domain/auth/OAuth2Provider.java

@@ -1,5 +1,6 @@
 package org.haedal.zzansuni.domain.auth;
 
 public enum OAuth2Provider {
-    KAKAO;
+    KAKAO,
+    NAVER,
 }

zzansuni-api-server/app/src/main/java/org/haedal/zzansuni/infrastructure/auth/NaverOAuth2Client.java

@@ -0,0 +1,86 @@
+package org.haedal.zzansuni.infrastructure.auth;
+
+
+import org.haedal.zzansuni.domain.auth.OAuth2Client;
+import org.haedal.zzansuni.domain.auth.OAuth2Provider;
+import org.haedal.zzansuni.domain.auth.OAuthUserInfoModel;
+import org.haedal.zzansuni.global.exception.ExternalServerConnectionException;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Profile;
+import org.springframework.http.HttpStatusCode;
+import org.springframework.http.client.ClientHttpRequestFactory;
+import org.springframework.stereotype.Component;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.client.RestClient;
+
+@Component
+@Profile({"prod", "dev"})
+public class NaverOAuth2Client implements OAuth2Client {
+    private final AuthTokenGenerator authTokenGenerator;
+    private final RestClient restClient;
+    public NaverOAuth2Client(AuthTokenGenerator authTokenGenerator, ClientHttpRequestFactory clientHttpRequestFactory) {
+        this.authTokenGenerator = authTokenGenerator;
+        // 타임아웃 설정, 4xx, 5xx 에러 핸들러 설정
+        this.restClient = RestClient
+                .builder()
+                .requestFactory(clientHttpRequestFactory)
+                .defaultStatusHandler(HttpStatusCode::is4xxClientError, (request, response) -> {
+                    throw new IllegalStateException("네이버 인증 code 요청에 실패했습니다.");
+                })
+                .defaultStatusHandler(HttpStatusCode::is5xxServerError, (request, response) -> {
+                    throw new ExternalServerConnectionException("네이버 인증 서버로 부터 문제가 발생했습니다.");
+                })
+                .build();
+    }
+    private static final String GRANT_TYPE = "authorization_code";
+    @Value("${naver.client-id}")
+    private String clientId;
+    @Value("${naver.redirect-uri}")
+    private String redirectUri;
+    @Value("${naver.client-secret}")
+    private String clientSecret;
+
+    @Override
+    public boolean canHandle(OAuth2Provider provider) {
+        return OAuth2Provider.NAVER.equals(provider);
+    }
+
+    @Override
+    public OAuthUserInfoModel getAuthToken(String code, String state) {
+        if(state == null) throw new IllegalArgumentException("state 값이 없습니다.");
+        MultiValueMap<String, String> body = new LinkedMultiValueMap<>();
+        body.add("grant_type", GRANT_TYPE);
+        body.add("client_id", clientId);
+        body.add("redirect_uri", redirectUri);
+        body.add("code", code);
+        body.add("client_secret", clientSecret);
+        body.add("state", state);
+
+        // 네이버 API를 통해 토큰을 발급받음
+        NaverTokenResponse tokenResponse = restClient
+                .post()
+                .uri("https://nid.naver.com/oauth2.0/token")
+                .body(body)
+                .retrieve()
+                .body(NaverTokenResponse.class);
+        String token = tokenResponse.accessToken();
+
+        // 네이버 API를 통해 사용자 정보를 가져옴
+        NaverUserInfoResponse userInfoResponse = restClient
+                .get()
+                .uri("https://openapi.naver.com/v1/nid/me")
+                .header("Authorization", "Bearer " + token)
+                .retrieve()
+                .body(NaverUserInfoResponse.class);
+        String id = userInfoResponse.response().id();
+        String nickname = userInfoResponse.response().nickname();
+
+        // id와 nickname을 이용하여 authToken을 생성
+        String authToken = authTokenGenerator.generate(id, OAuth2Provider.NAVER);
+        return OAuthUserInfoModel.builder()
+                .nickname(nickname)
+                .authToken(authToken)
+                .build();
+    }
+}

zzansuni-api-server/app/src/main/java/org/haedal/zzansuni/infrastructure/auth/NaverTokenResponse.java

@@ -0,0 +1,15 @@
+package org.haedal.zzansuni.infrastructure.auth;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public record NaverTokenResponse(
+        @JsonProperty("access_token")
+        String accessToken,
+        @JsonProperty("token_type")
+        String tokenType,
+        @JsonProperty("refresh_token")
+        String refreshToken,
+        @JsonProperty("expires_in")
+        Long expiresIn
+) {
+}

zzansuni-api-server/app/src/main/java/org/haedal/zzansuni/infrastructure/auth/NaverUserInfoResponse.java

@@ -0,0 +1,14 @@
+package org.haedal.zzansuni.infrastructure.auth;
+
+public record NaverUserInfoResponse(
+        String resultcode,
+        String message,
+        NaverUserInfoResponseResponse response
+) {
+
+    public record NaverUserInfoResponseResponse(
+            String id,
+            String nickname
+    ) {
+    }
+}