From 7ca9a9503cf427331f0a538bc9c6548830b81c2e Mon Sep 17 00:00:00 2001
From: Guus der Kinderen <guus.der.kinderen@gmail.com>
Date: Fri, 14 Jun 2024 22:25:05 +0200
Subject: [PATCH] [muc] Prevent duplicate processing of mediated invitations

When a MUC mediated invitation includes the `<x xmlns='jabber:x:conference'>` element (for backwards compatibility), then Smack should not fire the 'direct invitation' event listener. The value for 'inviter' that's used to invoke that listener will be false.

Fixes SMACK-943
---
 .../java/org/jivesoftware/smackx/muc/MultiUserChatManager.java   | 1 +
 1 file changed, 1 insertion(+)

diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/muc/MultiUserChatManager.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/muc/MultiUserChatManager.java
index 47de2163de..612f68acaa 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/muc/MultiUserChatManager.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/muc/MultiUserChatManager.java
@@ -148,6 +148,7 @@ public static synchronized MultiUserChatManager getInstanceFor(XMPPConnection co
     private static final StanzaFilter DIRECT_INVITATION_FILTER =
         new AndFilter(StanzaTypeFilter.MESSAGE,
                       new ExtensionElementFilter<GroupChatInvitation>(GroupChatInvitation.class),
+                      new NotFilter(new ExtensionElementFilter<>(MUCUser.class)),
                       new NotFilter(MessageTypeFilter.ERROR));
 
     private static final ExpirationCache<DomainBareJid, DiscoverInfo> KNOWN_MUC_SERVICES = new ExpirationCache<>(