From 76919e0c9679cdf68e2dc3f58c69f90c9a845356 Mon Sep 17 00:00:00 2001
From: Bohdan Horbeshko <bodqhrohro@gmail.com>
Date: Fri, 9 May 2025 22:17:28 -0400
Subject: [PATCH] Duplicate MUC invitations via a legacy element

---
 xmpp/extensions/extensions.go | 6 ++++++
 xmpp/gateway/gateway.go       | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/xmpp/extensions/extensions.go b/xmpp/extensions/extensions.go
index d40b5f6..2afc36c 100644
--- a/xmpp/extensions/extensions.go
+++ b/xmpp/extensions/extensions.go
@@ -213,6 +213,12 @@ type QueryRegisterRemove struct {
 	XMLName xml.Name `xml:"remove"`
 }
 
+// MessageXLegacyInviteExtension is from JEP-0045
+type MessageXLegacyInviteExtension struct {
+	XMLName xml.Name `xml:"jabber:x:conference x"`
+	Jid     string   `xml:"jid,attr"`
+}
+
 // MessageXMucUserExtension is from XEP-0045
 type MessageXMucUserExtension struct {
 	XMLName  xml.Name              `xml:"http://jabber.org/protocol/muc#user x"`
diff --git a/xmpp/gateway/gateway.go b/xmpp/gateway/gateway.go
index 65d488a..28147eb 100644
--- a/xmpp/gateway/gateway.go
+++ b/xmpp/gateway/gateway.go
@@ -269,6 +269,8 @@ func sendMessageWrapper(to, from, body, subject, errorText, id string, component
 			Invite: extensions.MessageXMucUserInvite{
 				From: inviteFrom,
 			},
+		}, extensions.MessageXLegacyInviteExtension{
+			Jid: messageFrom,
 		})
 	}