From 5ed941ce0c6599e3d96d43e57c070d9e78eed6db Mon Sep 17 00:00:00 2001
From: Oibek Khashimov <o.khashimov@eslgaming.com>
Date: Thu, 7 Aug 2025 12:33:10 +0600
Subject: [PATCH] Broadcast messages to online users only

---
 src/muc_light/mod_muc_light_codec_modern.erl | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/muc_light/mod_muc_light_codec_modern.erl b/src/muc_light/mod_muc_light_codec_modern.erl
index 33e90a3f4e..3b9336ac22 100644
--- a/src/muc_light/mod_muc_light_codec_modern.erl
+++ b/src/muc_light/mod_muc_light_codec_modern.erl
@@ -72,7 +72,7 @@ encode({#msg{} = Msg, AffUsers}, Sender, RoomBareJid, HandleFun, Acc) ->
                      = mongoose_hooks:filter_room_packet(HostType, MsgForArch, EventData),
     lists:foreach(
       fun({{U, S}, _}) ->
-              msg_to_aff_user(RoomJID, U, S, Attrs, Children, HandleFun)
+              msg_to_aff_user_online(RoomJID, U, S, Attrs, Children, HandleFun)
       end, AffUsers),
     mongoose_acc:update_stanza(#{from_jid => RoomJID,
                                  to_jid => RoomBareJid,
@@ -530,3 +530,14 @@ room_event(Acc, RoomJID) ->
       affiliation => owner,
       role => moderator,
       timestamp => TS}.
+
+-spec msg_to_aff_user_online(From :: jid:jid(), ToU :: jid:luser(), ToS :: jid:lserver(),
+                             Attrs :: exml:attrs(), Children :: [exml:child()],
+                             HandleFun :: mod_muc_light_codec_backend:encoded_packet_handler()) -> ok.
+msg_to_aff_user_online(RoomJID, U, S, Attrs, Children, HandleFun) ->
+    case ejabberd_sm_backend:get_sessions(U, S) of
+        [_ | _] ->
+            msg_to_aff_user(RoomJID, U, S, Attrs, Children, HandleFun);
+        _ ->
+            ok
+    end.