fix: fan out unread presence to online sessions

server/store/group_message_runtime.go

@@ -6,6 +6,7 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
+	"reflect"
 	"sort"
 	"strconv"
 	"strings"
@@ -74,6 +75,7 @@ type RealtimeFanoutEnvelope struct {
 	TargetType   string          `json:"target_type"`
 	Target       string          `json:"target"`
 	SkipSid      string          `json:"skip_sid,omitempty"`
+	SkipTopic    string          `json:"skip_topic,omitempty"`
 	DedupKey     string          `json:"dedup_key,omitempty"`
 	Message      json.RawMessage `json:"message"`
 }
@@ -1060,6 +1062,7 @@ func (r *redisGroupMessageRuntime) PublishRealtimeFanout(originNodeID string, te
 		TargetType:   targetType,
 		Target:       target,
 		SkipSid:      skipSid,
+		SkipTopic:    realtimeFanoutSkipTopic(message),
 		DedupKey:     dedupKey,
 		Message:      payload,
 	})
@@ -1069,6 +1072,39 @@ func (r *redisGroupMessageRuntime) PublishRealtimeFanout(originNodeID string, te
 	return r.client.Publish(context.Background(), r.realtimeFanoutChannel(tenantID), envelope).Err()
 }
 
+func realtimeFanoutSkipTopic(message any) string {
+	if message == nil {
+		return ""
+	}
+	v := reflect.ValueOf(message)
+	if v.Kind() == reflect.Pointer {
+		if v.IsNil() {
+			return ""
+		}
+		v = v.Elem()
+	}
+	if v.Kind() != reflect.Struct {
+		return ""
+	}
+	for _, fieldName := range []string{"Pres", "Info"} {
+		field := v.FieldByName(fieldName)
+		if !field.IsValid() || field.IsNil() {
+			continue
+		}
+		if field.Kind() == reflect.Pointer {
+			field = field.Elem()
+		}
+		if field.Kind() != reflect.Struct {
+			continue
+		}
+		skip := field.FieldByName("SkipTopic")
+		if skip.IsValid() && skip.Kind() == reflect.String {
+			return strings.TrimSpace(skip.String())
+		}
+	}
+	return ""
+}
+
 func (r *redisGroupMessageRuntime) StartGroupFanoutSubscriber(ctx context.Context, nodeID string, handler func([]byte)) error {
 	return r.StartRealtimeFanoutSubscriber(ctx, nodeID, func(envelope *RealtimeFanoutEnvelope) {
 		if envelope != nil {