fix: fan out unread presence to online sessions

server/sessionstore.go

@@ -209,6 +209,9 @@ func (ss *SessionStore) DeliverToUser(tenantID types.TenantID, uid types.Uid, sk
 		if sess == nil || sess.isCluster() || sess.isProxy() || sess.tenantID != tenantID || sess.uid != uid || sess.sid == skipSid {
 			return true
 		}
+		if userMessageSkipTopic(msg, sess) {
+			return true
+		}
 		if sess.queueOut(msg.copy()) {
 			delivered++
 		}
@@ -217,6 +220,37 @@ func (ss *SessionStore) DeliverToUser(tenantID types.TenantID, uid types.Uid, sk
 	return delivered
 }
 
+func userMessageSkipTopic(msg *ServerComMessage, sess *Session) bool {
+	if msg == nil || sess == nil {
+		return false
+	}
+	skipTopic := ""
+	switch {
+	case msg.Pres != nil:
+		skipTopic = msg.Pres.SkipTopic
+	case msg.Info != nil:
+		skipTopic = msg.Info.SkipTopic
+	}
+	return sessionHasTopicOrP2PAlias(sess, skipTopic)
+}
+
+func sessionHasTopicOrP2PAlias(sess *Session, topic string) bool {
+	if sess == nil || topic == "" {
+		return false
+	}
+	if sess.hasSub(topic) {
+		return true
+	}
+	if types.GetTopicCat(topic) != types.TopicCatP2P || sess.uid.IsZero() {
+		return false
+	}
+	viewTopic, err := types.P2PNameForUser(sess.uid, topic)
+	if err != nil || viewTopic == "" {
+		return false
+	}
+	return sess.hasSub(viewTopic)
+}
+
 func (ss *SessionStore) DeliverToTopicSubscribers(tenantID types.TenantID, topic, skipSid string, msg *ServerComMessage) int {
 	if ss == nil || !tenantID.IsValid() || topic == "" || msg == nil {
 		return 0