[smuxi: 1/2] Engine-XMPP: also send presence updates to MUCs, see XEP-0045 (closes: #1005)

[Mirco M. M. Bauer <mmmbauer src gnome org>]

commit a465611e751b68420a99b0d7bf013e3631779f3e
Author: Mirco Bauer <meebey meebey net>
Date:   Tue Dec 23 18:05:18 2014 +0100

    Engine-XMPP: also send presence updates to MUCs, see XEP-0045 (closes: #1005)

 .../Protocols/Xmpp/XmppProtocolManager.cs          |   25 ++++++++++++++++++++
 1 files changed, 25 insertions(+), 0 deletions(-)
---
diff --git a/src/Engine-XMPP/Protocols/Xmpp/XmppProtocolManager.cs 
b/src/Engine-XMPP/Protocols/Xmpp/XmppProtocolManager.cs
index cb95053..47c51aa 100644
--- a/src/Engine-XMPP/Protocols/Xmpp/XmppProtocolManager.cs
+++ b/src/Engine-XMPP/Protocols/Xmpp/XmppProtocolManager.cs
@@ -635,6 +635,31 @@ namespace Smuxi.Engine
             }
 
             JabberClient.SendMyPresence();
+
+            // send presence update to all MUCs, see XEP-0045:
+            // http://xmpp.org/extensions/xep-0045.html#changepres
+            foreach (var chat in Chats) {
+                if (!(chat is XmppGroupChatModel)) {
+                    continue;
+                }
+                var muc = (XmppGroupChatModel) chat;
+
+                var to = new Jid(muc.ID) {
+                    Resource = muc.OwnNickname
+                };
+
+                var presence = new Presence() {
+                    Show = JabberClient.Show,
+                    Status = JabberClient.Status,
+                    From = JabberClient.MyJID,
+                    To = to
+                };
+
+                if (JabberClient.EnableCapabilities) {
+                    presence.AddChild(JabberClient.Capabilities);
+                }
+                JabberClient.Send(presence);
+            }
         }
 
         [MethodImpl(MethodImplOptions.Synchronized)]