/**
 * 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.archive;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;

import org.xmlpull.v1.XmlSerializer;

import com.xabber.xmpp.IQ;
import com.xabber.xmpp.SerializerUtils;
import com.xabber.xmpp.rsm.Set;

/**
 * Represents list of modified collection.
 * <p/>
 * http://xmpp.org/extensions/xep-0136.html
 *
 * @author alexander.ivanov
 */
public class Modified extends IQ {

    static final String ELEMENT_NAME = "modified";
    static final String NAMESPACE = "urn:xmpp:archive";

    static final String START_ATTRIBUTE = "start";

    private Date start;
    private Set rsm;
    private final Collection<AbstractModified> chats;

    public Modified() {
        chats = new ArrayList<AbstractModified>();
    }

    @Override
    public void serializeContent(XmlSerializer serializer) throws IOException {
        if (start != null)
            SerializerUtils.setDateTimeAttribute(serializer, START_ATTRIBUTE,
                    start);
        for (AbstractModified chat : chats)
            chat.serialize(serializer);
        if (rsm != null)
            rsm.serialize(serializer);
    }

    @Override
    public boolean isValid() {
        return true;
    }

    @Override
    public String getElementName() {
        return ELEMENT_NAME;
    }

    @Override
    public String getNamespace() {
        return NAMESPACE;
    }

    public Date getStart() {
        return start;
    }

    public void setStart(Date start) {
        this.start = start;
    }

    public Set getRsm() {
        return rsm;
    }

    public void setRsm(Set rsm) {
        this.rsm = rsm;
    }

    public Collection<AbstractModified> getChats() {
        return Collections.unmodifiableCollection(chats);
    }

    public void addModified(AbstractModified value) {
        chats.add(value);
    }

}
