Smuxi.Engine.XmppProtocolManager.OnSendingServiceUnavailable C# (CSharp) Method

        void OnSendingServiceUnavailable(object sender, SendingServiceUnavailableEventArgs e)
        {
            if (e.Stanza.To == null) {
                // can only be received by the server
                return;
            }
            if (e.Stanza.To == JabberClient.MyJID.Server) {
                // explicitly targeting the server
                return;
            }
            XmppPersonModel person;
            if (!Contacts.TryGetValue(e.Stanza.To.Bare, out person)) {
                e.Cancel = true;
                return;
            }
            if (person.Subscription != SubscriptionType.both &&
                person.Subscription != SubscriptionType.from) {
                e.Cancel = true;
                return;
            }
            // the person already knows we are online, this does not give away our privacy
        }