/*
 * Jitsi, the OpenSource Java VoIP and Instant Messaging client.
 *
 * Copyright @ 2015 Atlassian Pty Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.java.sip.communicator.impl.protocol.jabber.extensions.mailnotification;

import net.java.sip.communicator.util.*;

import org.jivesoftware.smack.packet.*;
import org.jivesoftware.smack.provider.*;
import org.xmlpull.v1.*;

/**
 * A straightforward implementation of the IQProvider. Parses custom IQ packets.
 * We receive IQ mailbox packets from google mail servers and we use them to
 * create <tt>Mailbox</tt> objects which contain all the information from the
 * packet.
 *
 * @author Matthieu Helleringer
 * @author Alain Knaebel
 */
public class MailboxIQProvider
        implements IQProvider
{
    /**
     * Logger for this class
     */
    private static final Logger logger =
        Logger.getLogger(MailboxIQProvider.class);

    /**
     * Return an <tt>IQ</tt> (i.e. <tt>Mailbox</tt>) object which will contain
     * the information we get from the parser.
     *
     * @param parser the <tt>XmlPullParser</tt> that we can use to get
     * packet details.
     *
     * @return a new IQ instance which is the result of the XmlPullParser.
     * @throws Exception if an error occurs parsing the XML.
     */
    public IQ parseIQ(final XmlPullParser parser) throws Exception
    {
        MailboxIQ mailboxIQ = new MailboxIQ();

        String resultTimeStr = parser.getAttributeValue("", "result-time");

        if(resultTimeStr != null)
            mailboxIQ.setResultTime(Long.parseLong( resultTimeStr ));

        String totalMatchedStr = parser.getAttributeValue("", "total-matched");

        if( totalMatchedStr != null )
            mailboxIQ.setTotalMatched(Integer.parseInt( totalMatchedStr ));

        String totalEstimateStr
            = parser.getAttributeValue("", "total-estimate");

        if( totalEstimateStr != null )
            mailboxIQ.setTotalEstimate("1".equals( totalEstimateStr));

        mailboxIQ.setUrl(parser.getAttributeValue("", "url"));


        int eventType = parser.next();
        while(eventType != XmlPullParser.END_TAG)
        {
            if (eventType == XmlPullParser.START_TAG)
            {
                String name = parser.getName();
                if(MailThreadInfo.ELEMENT_NAME.equals(name))
                {
                    //parse mail thread information
                    MailThreadInfo thread = MailThreadInfo.parse(parser);
                    mailboxIQ.addThread(thread);
                }

            }
            else
            {
                if(logger.isTraceEnabled())
                {
                    logger.trace("xml parser returned eventType=" + eventType);
                    if (logger.isTraceEnabled())
                        logger.trace("parser="+parser.getText());
                }
            }
            eventType = parser.next();
        }

        return mailboxIQ;
    }
}