feat: Send message when a user registers or creates a group

src/main/java/com/gamzabat/algohub/auth/service/OAuth2Service.java

@@ -28,6 +28,7 @@
 import com.gamzabat.algohub.auth.exception.GithubApiException;
 import com.gamzabat.algohub.common.jwt.TokenProvider;
 import com.gamzabat.algohub.common.jwt.dto.JwtDTO;
+import com.gamzabat.algohub.common.logging.DiscordWebhookService;
 import com.gamzabat.algohub.constants.ApiConstants;
 import com.gamzabat.algohub.enums.Role;
 import com.gamzabat.algohub.feature.user.domain.User;
@@ -48,6 +49,7 @@ public class OAuth2Service {
 	private String secretKey;
 	private final RestTemplate restTemplate;
 	private final UserRepository userRepository;
+	private final DiscordWebhookService webhookService;
 
 	@Transactional
 	public TokenResponse githubSignIn(String code) {
@@ -79,6 +81,8 @@ private void register(GithubUserDto githubUser) {
 			.build());
 		newUser.editNickname(createTemporaryNickname(githubUser.getLogin(), newUser.getId()));
 		newUser.editGithubName(githubUser.getLogin());
+
+		webhookService.sendRegisterMessage(newUser.getNickname(), "Github", newUser.getId());
 	}
 
 	private String createTemporaryNickname(String login, Long id) {

src/main/java/com/gamzabat/algohub/common/logging/DiscordWebhookService.java

@@ -0,0 +1,48 @@
+package com.gamzabat.algohub.common.logging;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+import org.springframework.util.StringUtils;
+import org.springframework.web.client.RestTemplate;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+@Service
+@RequiredArgsConstructor
+@Slf4j
+public class DiscordWebhookService {
+	@Value("${noti_url:}")
+	private String webhookUrl;
+
+	private final RestTemplate restTemplate;
+
+	public void sendRegisterMessage(String username, String type, Long sid) {
+		String content = username + " 님이 " + type + " 방식으로 " + sid + "번째로 회원가입 하셨습니다!! 🎉";
+		this.send(content);
+	}
+
+	public void sendCreateGroupMessage(String username, String groupName) {
+		String content = username + " 님이 " + groupName + " 그룹을 생성하셨습니다 😎";
+		this.send(content);
+	}
+
+	private void send(String message) {
+		try {
+			if (!StringUtils.hasText(webhookUrl)) {
+				log.debug("No webhook url provided");
+				return;
+			}
+			Map<String, String> payload = new HashMap<>();
+			payload.put("content", message);
+			restTemplate.postForObject(webhookUrl, payload, String.class);
+			log.info("Webhook sent: {}", message);
+		} catch (Exception e) {
+			log.error("Error sending webhook message", e);
+		}
+	}
+
+}

src/main/java/com/gamzabat/algohub/feature/group/studygroup/service/StudyGroupService.java

@@ -17,6 +17,7 @@
 import org.springframework.web.multipart.MultipartFile;
 
 import com.aventrix.jnanoid.jnanoid.NanoIdUtils;
+import com.gamzabat.algohub.common.logging.DiscordWebhookService;
 import com.gamzabat.algohub.constants.BOJResultConstants;
 import com.gamzabat.algohub.enums.ImageType;
 import com.gamzabat.algohub.exception.StudyGroupValidationException;
@@ -88,6 +89,7 @@ public class StudyGroupService {
 	private final ObjectProvider<StudyGroupService> studyGroupServiceProvider;
 	private final NotificationSettingRepository notificationSettingRepository;
 	private final NotificationService notificationService;
+	private final DiscordWebhookService webhookService;
 
 	@Transactional
 	public GroupCodeResponse createGroup(User user, CreateGroupRequest request, MultipartFile profileImage) {
@@ -122,6 +124,8 @@ public GroupCodeResponse createGroup(User user, CreateGroupRequest request, Mult
 
 		saveGroupImage(profileImage, group);
 		log.info("success to save study group user_id={}", user.getId());
+
+		webhookService.sendCreateGroupMessage(user.getNickname(), group.getName());
 		return new GroupCodeResponse(inviteCode);
 	}
 

src/main/java/com/gamzabat/algohub/feature/user/service/UserService.java

@@ -27,6 +27,7 @@
 import com.gamzabat.algohub.common.jwt.TokenProvider;
 import com.gamzabat.algohub.common.jwt.dto.JwtDTO;
 import com.gamzabat.algohub.common.jwt.dto.ReissueTokenRequest;
+import com.gamzabat.algohub.common.logging.DiscordWebhookService;
 import com.gamzabat.algohub.common.redis.RedisService;
 import com.gamzabat.algohub.enums.EmailType;
 import com.gamzabat.algohub.enums.ImageType;
@@ -74,6 +75,7 @@ public class UserService {
 	private final RestTemplate restTemplate;
 	private final ResetPasswordRepository resetPasswordRepository;
 	private final EmailService emailService;
+	private final DiscordWebhookService webhookService;
 
 	@Transactional
 	public void register(RegisterRequest request, MultipartFile profileImage, String token) {
@@ -94,6 +96,8 @@ public void register(RegisterRequest request, MultipartFile profileImage, String
 
 		saveProfileImage(profileImage, user);
 		log.info("success to register user_id={}", user.getId());
+
+		webhookService.sendRegisterMessage(user.getNickname(), "SignUp", user.getId());
 	}
 
 	private void saveProfileImage(MultipartFile profileImage, User user) {

src/test/java/com/gamzabat/algohub/feature/user/service/UserServiceTest.java

@@ -37,6 +37,7 @@
 
 import com.gamzabat.algohub.common.jwt.TokenProvider;
 import com.gamzabat.algohub.common.jwt.dto.JwtDTO;
+import com.gamzabat.algohub.common.logging.DiscordWebhookService;
 import com.gamzabat.algohub.common.redis.RedisService;
 import com.gamzabat.algohub.enums.EmailType;
 import com.gamzabat.algohub.enums.ImageType;
@@ -90,6 +91,8 @@ class UserServiceTest {
 	private ResetPasswordRepository resetPasswordRepository;
 	@Mock
 	private EmailService emailService;
+	@Mock
+	private DiscordWebhookService webhookService;
 	@Captor
 	private ArgumentCaptor<User> userCaptor;
 	@Captor

src/test/java/com/gamzabat/algohub/service/StudyGroupServiceTest.java

@@ -24,6 +24,7 @@
 import org.springframework.mock.web.MockMultipartFile;
 
 import com.gamzabat.algohub.common.DateFormatUtil;
+import com.gamzabat.algohub.common.logging.DiscordWebhookService;
 import com.gamzabat.algohub.enums.ImageType;
 import com.gamzabat.algohub.enums.Role;
 import com.gamzabat.algohub.exception.StudyGroupValidationException;
@@ -97,6 +98,8 @@ class StudyGroupServiceTest {
 	@Mock
 	private SolutionCommentRepository solutionCommentRepository;
 	@Mock
+	private DiscordWebhookService webhookService;
+	@Mock
 	private RankingRepository rankingRepository;
 	@Mock
 	private ObjectProvider<StudyGroupService> studyGroupServiceObjectProvider;