/**
 * Copyright (c) 2013, Redsolution LTD. All rights reserved.
 *
 * This file is part of Xabber project; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License, Version 3.
 *
 * Xabber is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License,
 * along with this program. If not, see http://www.gnu.org/licenses/.
 */
package com.xabber.xmpp.muc;

import org.jivesoftware.smack.packet.ExtensionElement;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smackx.muc.packet.MUCUser;

/**
 * Helper class to get MUC information.
 *
 * @author alexander.ivanov
 */
public class MUC {

    private MUC() {
    }

    /**
     * Returns the MUCUser packet extension included in the packet or
     * <tt>null</tt> if none.
     *
     * @param packet the packet that may include the MUCUser extension.
     * @return the MUCUser found in the packet.
     */
    public static MUCUser getMUCUserExtension(Packet packet) {
        if (packet != null)
            for (ExtensionElement extension : packet.getExtensions())
                if (extension instanceof MUCUser)
                    return (MUCUser) extension;
        return null;
    }

}
