/**
* $RCSfile$
* $Revision$
* $Date$
*
* Copyright (C) 2002-2004 Jive Software. All rights reserved.
* ====================================================================
* The Jive Software License (based on Apache Software License, Version 1.1)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in
*    the documentation and/or other materials provided with the
*    distribution.
*
* 3. The end-user documentation included with the redistribution,
*    if any, must include the following acknowledgment:
*       "This product includes software developed by
*        Jive Software (http://www.jivesoftware.com)."
*    Alternately, this acknowledgment may appear in the software itself,
*    if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Smack" and "Jive Software" must not be used to
*    endorse or promote products derived from this software without
*    prior written permission. For written permission, please
*    contact webmaster@jivesoftware.com.
*
* 5. Products derived from this software may not be called "Smack",
*    nor may "Smack" appear in their name, without prior written
*    permission of Jive Software.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED.  IN NO EVENT SHALL JIVE SOFTWARE OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*/

package org.jivesoftware.smackx.workgroup.packet;

import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.provider.IQProvider;
import org.xmlpull.v1.XmlPullParser;

/**
 * An IQ packet that encapsulates both types of workgroup queue
 * status notifications -- position updates, and estimated time
 * left in the queue updates.
 */
public class QueueUpdate extends IQ {

    /**
     * Element name of the packet extension.
     */
    public static final String ELEMENT_NAME = "queue-status";

    /**
     * Namespace of the packet extension.
     */
    public static final String NAMESPACE = "xmpp:workgroup";

    private int position;
    private int remainingTime;

    public QueueUpdate(int position, int remainingTime) {
        this.position = position;
        this.remainingTime = remainingTime;
    }

    /**
     * Returns the user's position in the workgroup queue, or -1 if the
     * value isn't set on this packet.
     *
     * @return the position in the workgroup queue.
     */
    public int getPosition() {
        return this.position;
    }

    /**
     * Returns the user's estimated time left in the workgroup queue, or
     * -1 if the value isn't set on this packet.
     *
     * @return the estimated time left in the workgroup queue.
     */
    public int getRemaingTime() {
        return remainingTime;
    }

    public String getChildElementXML () {
        StringBuffer buf = new StringBuffer();
        buf.append("<queue-status xmlns=\"xmpp:workgroup\">");
        if (position != -1) {
            buf.append("<queue-position>").append(position).append("</queue-position>");
        }
        else if (remainingTime != -1) {
            buf.append("<queue-time>").append(remainingTime).append("</queue-time>");
        }
        buf.append("</queue-status>");
        return buf.toString();
    }

    public static class Provider implements IQProvider {

        public IQ parseIQ(XmlPullParser parser) throws Exception {
            boolean done = false;
            int position = -1;
            int timeRemaining = -1;
            while (!done) {
                parser.next();
                String elementName = parser.getName();
                if (parser.getEventType() == XmlPullParser.START_TAG && "position".equals(elementName)) {
                    try {
                        position = Integer.parseInt(parser.nextText());
                    }
                    catch (NumberFormatException nfe) { }
                }
                else if (parser.getEventType() == XmlPullParser.START_TAG && "time".equals(elementName)) {
                    try {
                        timeRemaining = Integer.parseInt(parser.nextText());
                    }
                    catch (NumberFormatException nfe) { }
                }
                else if (parser.getEventType() == XmlPullParser.END_TAG && "queue-status".equals(elementName)) {
                    done = true;
                }
            }
            return new QueueUpdate(position, timeRemaining);
        }
    }
}