private ConversationViewModel GetConversationModel(string userName, IChatRoom room = null, bool roomMode = true)
{
var cm = ConversationItems.FirstOrDefault(i => i.GetUniqueName().EqIgnoreCase(userName));
if (cm != null)
{
return(cm);
}
var r = room ?? _jabber.GetRoom(userName);
if (r == null)
{
return(null);
}
var conversation = new ConversationViewModel(userName, room, roomMode);
DispatcherHelper.BeginInvoke(new Action(() => ConversationItems.Add(conversation)));
return(conversation);
}
