feat: add redis cache and fanout support

server/user.go

@@ -1069,12 +1069,12 @@ func usersShutdown() {
 	}
 }
 
-func usersUpdateUnread(tenantID types.TenantID, uid types.Uid, val int, inc bool) {
+func usersUpdateUnread(tenantID types.TenantID, uid types.Uid, val int64, inc bool) {
 	if globals.usersUpdate == nil || (val == 0 && inc) {
 		return
 	}
 
-	upd := &UserCacheReq{TenantID: tenantID, UserId: uid, Unread: val, Inc: inc}
+	upd := &UserCacheReq{TenantID: tenantID, UserId: uid, Unread: int(val), Inc: inc}
 	if globals.cluster.isRemoteTopic(types.TopicKey{TenantID: tenantID, Topic: uid.UserId()}) {
 		// Send request to remote node which owns the user.
 		globals.cluster.routeUserReq(upd)
@@ -1240,6 +1240,7 @@ func userUpdater() {
 
 			usersCache[key] = uce
 			counts[uid] = uce.unread
+			store.CacheUserUnreadCount(tenantID, uid, uce.unread)
 		}
 
 		if len(dbPending) > 0 {
@@ -1287,6 +1288,7 @@ func userUpdater() {
 					}
 					uce.unread = count
 					usersCache[key] = uce
+					store.CacheUserUnreadCount(io.tenantID, uid, count)
 				} else {
 					logs.Warn.Println("users: missing users cache entry after IO completion, uid", uid)
 				}
@@ -1416,6 +1418,7 @@ func userUpdater() {
 			if upd.Gone {
 				// User is being deleted. Don't care if there is a record.
 				delete(usersCache, types.UserKey{TenantID: upd.TenantID, User: upd.UserId})
+				store.DeleteCachedUserUnreadCount(upd.TenantID, upd.UserId)
 				continue
 			}