public static final char FLAG_ADMIN = 'a';

    public static final char FLAG_CHIEF = 'h';

    public static final char FLAG_READY = 'r';

    public static final char FLAG_REGISTERED = 'u';

    public final String nick, flags;

    public final boolean newFlagState;

    public ClientFlagsUpdate(String nick, String flags, boolean newFlagState) {

        this.nick = nick;

        this.flags = flags;

        this.newFlagState = newFlagState;

    }

    public Player applyTo(Player p) {

        return new Player(

                p.name,

                updatedFlag(FLAG_REGISTERED, p.registered),

                updatedFlag(FLAG_ADMIN, p.admin));

    }

    public PlayerInRoom applyTo(PlayerInRoom p) {

        return new PlayerInRoom(

                this.applyTo(p.player),

                updatedFlag(FLAG_READY, p.ready),

                updatedFlag(FLAG_CHIEF, p.roomChief));

    }

    public boolean appliesTo(char flag) {

        return flags.indexOf(flag) != -1;

    }

    private boolean updatedFlag(char flag, boolean oldValue) {

        return appliesTo(flag) ? newFlagState : oldValue;

    }

    @Override

    public String toString() {

        return "ClientFlagsUpdate [nick=" + nick + ", flags=" + flags

                + ", newFlagState=" + newFlagState + "]";

    }