1 files changed, 73 insertions, 0 deletions
diff --git a/xmpp/handlers.go b/xmpp/handlers.go
index 3ab79c7..eea14be 100644
--- a/xmpp/handlers.go
+++ b/xmpp/handlers.go
@@ -324,7 +324,9 @@ func HandlePresence(s xmpp.Sender, p stanza.Packet) {
 	prs.Get(&mucExt)
 	if mucExt.XMLName.Space != "" {
 		handleMUCPresence(s, prs, mucExt)
+		return
 	}
+	tryHandleMUCNicknameChange(s, prs)
 }
 
 func handleSubscription(s xmpp.Sender, p stanza.Presence) {
@@ -498,6 +500,77 @@ func handleMUCPresence(s xmpp.Sender, p stanza.Presence, mucExt stanza.MucPresen
 	}
 }
 
+func tryHandleMUCNicknameChange(s xmpp.Sender, p stanza.Presence) {
+	log.WithFields(log.Fields{
+		"type": p.Type,
+		"from": p.From,
+		"to":   p.To,
+	}).Warn("Nickname change presence?")
+	log.Debugf("%#v", p)
+
+	if p.Type != "" {
+		return
+	}
+
+	toBare, nickname, ok := gateway.SplitJID(p.To)
+	if !ok || nickname == "" {
+		return
+	}
+
+	fromBare, fromResource, ok := gateway.SplitJID(p.From)
+	if !ok {
+		return
+	}
+
+	session, ok := sessions[fromBare]
+	if !ok || !session.Session.MUC {
+		return
+	}
+
+	chatId, ok := toToID(toBare)
+	if !ok {
+		return
+	}
+
+	chat, _, err := session.GetContactByID(chatId, nil)
+	if err != nil || !session.IsGroup(chat) {
+		return
+	}
+
+	if !session.MUCHasResource(chatId, fromResource) {
+		return
+	}
+
+	log.Warn("🗿 Yes")
+
+	component, ok := s.(*xmpp.Component)
+	if !ok {
+		log.Error("Not a component")
+		return
+	}
+
+	from := toBare
+	nickname, ok = session.GetMyMUCNickname(chatId)
+	if ok {
+		from = from+"/"+nickname
+	}
+	reply := &stanza.Presence{
+		Attrs: stanza.Attrs{
+			From:  from,
+			To:    p.From,
+			Id:    p.Id,
+			Type:  stanza.PresenceTypeError,
+		},
+		Error: stanza.Err{
+			Code:   406,
+			Type:   stanza.ErrorTypeModify,
+			Reason: "not-acceptable",
+			Text:   "Telegram does not support changing nicknames per-chat. Issue a /setname command to the transport if you wish to change the global name",
+		},
+	}
+	gateway.ResumableSend(component, reply)
+}
+
 func handleGetVcardIq(s xmpp.Sender, iq *stanza.IQ, typ byte) {
 	log.WithFields(log.Fields{
 		"from": iq.From,