public void sendServerMessage(String message) {
        ArrayList < Client > tclients = new ArrayList < Client > ();
        tclients.addAll(clients);
        for (int i = 0; i < channels.size(); i++) {
            ArrayList < Client > clients = channels.get(i).getUsers();
            for (Client c: clients) {
                if (!(tclients.contains(c))) {
                    tclients.add(c);
                }
            }
        }
        for (Client c: tclients) {
            c.sendMessage(":" + ip + " PRIVMSG " + c.getName() + " :" + message);
        }
    }