Add a <x muc#user> node on outgoing private MUC messages

See https://xmpp.org/extensions/xep-0045.html#privatemessage

fix #3321

2 files changed, 9 insertions, 2 deletions

diff --git a/src/xmpp/xmpp_component.cpp b/src/xmpp/xmpp_component.cpp
index 24a85d7..c44b990 100644
--- a/src/xmpp/xmpp_component.cpp
+++ b/src/xmpp/xmpp_component.cpp
@@ -269,7 +269,8 @@ void* XmppComponent::get_receive_buffer(const size_t size) const
 }
 
 void XmppComponent::send_message(const std::string& from, Xmpp::body&& body, const std::string& to,
-                                 const std::string& type, const bool fulljid, const bool nocopy)
+                                 const std::string& type, const bool fulljid, const bool nocopy,
+                                 const bool muc_private)
 {
   Stanza message("message");
   {
@@ -301,6 +302,11 @@ void XmppComponent::send_message(const std::string& from, Xmpp::body&& body, con
         XmlSubNode nocopy(message, "no-copy");
         nocopy["xmlns"] = "urn:xmpp:hints";
       }
+    if (muc_private)
+      {
+        XmlSubNode x(message, "x");
+        x["xmlns"] = MUC_USER_NS;
+      }
   }
   this->send_stanza(message);
 }
diff --git a/src/xmpp/xmpp_component.hpp b/src/xmpp/xmpp_component.hpp
index 22d5c48..2bbbe3b 100644
--- a/src/xmpp/xmpp_component.hpp
+++ b/src/xmpp/xmpp_component.hpp
@@ -112,7 +112,8 @@ public:
    * server-part of the JID and must be added.
    */
   void send_message(const std::string& from, Xmpp::body&& body, const std::string& to,
-                    const std::string& type, const bool fulljid, const bool nocopy=false);
+                    const std::string& type, const bool fulljid, const bool nocopy=false,
+                    const bool muc_private=false);
   /**
    * Send a join from a new participant
    */