[FIX] 동일 기기 여러 계정 푸시 알림 처리

src/main/java/org/websoso/WSSServer/controller/AuthController.java

@@ -59,7 +59,8 @@ public ResponseEntity<Void> logout(Principal principal,
                                        @Valid @RequestBody LogoutRequest request) {
         User user = userService.getUserOrException(Long.valueOf(principal.getName()));
         String refreshToken = request.refreshToken();
-        userService.logout(user, refreshToken);
+        String deviceIdentifier = request.deviceIdentifier();
+        userService.logout(user, refreshToken, deviceIdentifier);
         return ResponseEntity
                 .status(NO_CONTENT)
                 .build();

src/main/java/org/websoso/WSSServer/dto/auth/LogoutRequest.java

@@ -1,6 +1,7 @@
 package org.websoso.WSSServer.dto.auth;
 
 public record LogoutRequest(
-        String refreshToken
+        String refreshToken,
+        String deviceIdentifier
 ) {
 }

src/main/java/org/websoso/WSSServer/repository/UserDeviceRepository.java

@@ -3,10 +3,13 @@
 import java.util.Optional;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
+import org.websoso.WSSServer.domain.User;
 import org.websoso.WSSServer.domain.UserDevice;
 
 @Repository
 public interface UserDeviceRepository extends JpaRepository<UserDevice, Long> {
 
-    Optional<UserDevice> findByDeviceIdentifier(String deviceIdentifier);
+    Optional<UserDevice> findByDeviceIdentifierAndUser(String deviceIdentifier, User user);
+
+    void deleteByUserAndDeviceIdentifier(User user, String deviceIdentifier);
 }

src/main/java/org/websoso/WSSServer/service/CommentService.java

@@ -76,6 +76,11 @@ private void sendCommentPushMessageToFeedOwner(User user, Feed feed) {
         );
         notificationRepository.save(notification);
 
+        List<UserDevice> feedOwnerDevices = feedOwner.getUserDevices();
+        if (feedOwnerDevices.isEmpty()) {
+            return;
+        }
+
         FCMMessageRequest fcmMessageRequest = FCMMessageRequest.of(
                 notificationTitle,
                 notificationBody,
@@ -84,8 +89,7 @@ private void sendCommentPushMessageToFeedOwner(User user, Feed feed) {
                 String.valueOf(notification.getNotificationId())
         );
 
-        List<String> targetFCMTokens = feedOwner
-                .getUserDevices()
+        List<String> targetFCMTokens = feedOwnerDevices
                 .stream()
                 .map(UserDevice::getFcmToken)
                 .toList();
@@ -137,7 +141,12 @@ private void sendCommentPushMessageToCommenters(User user, Feed feed) {
             );
             notificationRepository.save(notification);
 
-            List<String> targetFCMTokens = commenter.getUserDevices()
+            List<UserDevice> commenterDevices = commenter.getUserDevices();
+            if (commenterDevices.isEmpty()) {
+                return;
+            }
+
+            List<String> targetFCMTokens = commenterDevices
                     .stream()
                     .map(UserDevice::getFcmToken)
                     .distinct()
@@ -150,7 +159,10 @@ private void sendCommentPushMessageToCommenters(User user, Feed feed) {
                     "feedDetail",
                     String.valueOf(notification.getNotificationId())
             );
-            fcmService.sendMulticastPushMessage(targetFCMTokens, fcmMessageRequest);
+            fcmService.sendMulticastPushMessage(
+                    targetFCMTokens,
+                    fcmMessageRequest
+            );
         });
     }
 

src/main/java/org/websoso/WSSServer/service/FeedService.java

@@ -149,6 +149,11 @@ private void sendLikePushMessage(User liker, Feed feed) {
         );
         notificationRepository.save(notification);
 
+        List<UserDevice> feedOwnerDevices = feedOwner.getUserDevices();
+        if (feedOwnerDevices.isEmpty()) {
+            return;
+        }
+
         FCMMessageRequest fcmMessageRequest = FCMMessageRequest.of(
                 notificationTitle,
                 notificationBody,
@@ -157,8 +162,7 @@ private void sendLikePushMessage(User liker, Feed feed) {
                 String.valueOf(notification.getNotificationId())
         );
 
-        List<String> targetFCMTokens = feedOwner
-                .getUserDevices()
+        List<String> targetFCMTokens = feedOwnerDevices
                 .stream()
                 .map(UserDevice::getFcmToken)
                 .toList();

src/main/java/org/websoso/WSSServer/service/PopularFeedService.java

@@ -56,6 +56,11 @@ private void sendPopularFeedPushMessage(Feed feed) {
         );
         notificationRepository.save(notification);
 
+        List<UserDevice> feedOwnerDevices = feedOwner.getUserDevices();
+        if (feedOwnerDevices.isEmpty()) {
+            return;
+        }
+
         FCMMessageRequest fcmMessageRequest = FCMMessageRequest.of(
                 notificationTitle,
                 notificationBody,
@@ -64,8 +69,7 @@ private void sendPopularFeedPushMessage(Feed feed) {
                 String.valueOf(notification.getNotificationId())
         );
 
-        List<String> targetFCMTokens = feed.getUser()
-                .getUserDevices()
+        List<String> targetFCMTokens = feedOwnerDevices
                 .stream()
                 .map(UserDevice::getFcmToken)
                 .toList();

src/main/java/org/websoso/WSSServer/service/UserService.java

@@ -179,8 +179,9 @@ public void registerUserInfo(User user, RegisterUserInfoRequest registerUserInfo
                 MessageFormatter.formatUserJoinMessage(user, SocialLoginType.fromSocialId(user.getSocialId())), JOIN));
     }
 
-    public void logout(User user, String refreshToken) {
+    public void logout(User user, String refreshToken, String deviceIdentifier) {
         refreshTokenRepository.findByRefreshToken(refreshToken).ifPresent(refreshTokenRepository::delete);
+        userDeviceRepository.deleteByUserAndDeviceIdentifier(user, deviceIdentifier);
         if (user.getSocialId().startsWith(KAKAO_PREFIX)) {
             kakaoService.kakaoLogout(user);
         }
@@ -253,7 +254,7 @@ public UserIdAndNicknameResponse getUserIdAndNicknameAndGender(User user) {
     }
 
     public boolean registerFCMToken(User user, FCMTokenRequest fcmTokenRequest) {
-        return userDeviceRepository.findByDeviceIdentifier(fcmTokenRequest.deviceIdentifier())
+        return userDeviceRepository.findByDeviceIdentifierAndUser(fcmTokenRequest.deviceIdentifier(), user)
                 .map(userDevice -> {
                     userDevice.updateFcmToken(fcmTokenRequest.fcmToken());
                     return false;