feat: add redis cache and fanout support

server/pres.go

@@ -12,7 +12,7 @@ import (
 // presParams defines parameters for creating a presence notification.
 type presParams struct {
 	userAgent string
-	seqID     int
+	seqID     int64
 	delID     int
 	delSeq    []MsgRange
 
@@ -483,7 +483,7 @@ func (t *Topic) presSubsOffline(what string, params *presParams,
 
 // Publish {info what=read|recv|kp} to topic subscribers's sessions currently offline in the topic,
 // on subscriber's 'me'. Group and P2P.
-func (t *Topic) infoSubsOffline(from types.Uid, what string, seq int, skipSid string) {
+func (t *Topic) infoSubsOffline(from types.Uid, what string, seq int64, skipSid string) {
 	user := from.UserId()
 
 	for uid, pud := range t.perUser {
@@ -509,7 +509,7 @@ func (t *Topic) infoSubsOffline(from types.Uid, what string, seq int, skipSid st
 }
 
 // Publish {info what=call} to topic subscribers's sessions on subscriber's 'me'.
-func (t *Topic) infoCallSubsOffline(from string, target types.Uid, event string, seq int,
+func (t *Topic) infoCallSubsOffline(from string, target types.Uid, event string, seq int64,
 	sdp json.RawMessage, skipSid string, offlineOnly bool) {
 	if target.IsZero() {
 		logs.Err.Printf("callSubs could not find target: topic %s - from %s", t.name, from)
@@ -672,9 +672,9 @@ func presSingleUserOfflineOffline(tenantID types.TenantID, uid types.Uid, origin
 // Let other sessions of a given user know what messages are now received/read.
 // If both 'read' and 'recv' != 0 then 'read' takes precedence over 'recv'.
 // Cases U
-func (t *Topic) presPubMessageCount(uid types.Uid, mode types.AccessMode, read, recv int, skip string) {
+func (t *Topic) presPubMessageCount(uid types.Uid, mode types.AccessMode, read, recv int64, skip string) {
 	var what string
-	var seq int
+	var seq int64
 	if read > 0 {
 		what = "read"
 		seq = read