001/**
002 *
003 * Copyright 2003-2007 Jive Software, 2014 Florian Schmaus
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.jivesoftware.smackx.time.packet;
018
019import java.util.Calendar;
020import java.util.Date;
021import java.util.logging.Level;
022import java.util.logging.Logger;
023
024import org.jivesoftware.smack.packet.IQ;
025
026import org.jxmpp.util.XmppDateTime;
027
028/**
029 * A Time IQ packet, which is used by XMPP clients to exchange their respective local
030 * times. Clients that wish to fully support the entity time protocol should register
031 * a PacketListener for incoming time requests that then respond with the local time.
032 *
033 * @see <a href="http://www.xmpp.org/extensions/xep-0202.html">XEP-202</a>
034 * @author Florian Schmaus
035 */
036public class Time extends IQ {
037    public static final String NAMESPACE = "urn:xmpp:time";
038    public static final String ELEMENT = "time";
039
040    private static final Logger LOGGER = Logger.getLogger(Time.class.getName());
041
042    private String utc;
043    private String tzo;
044
045    public Time() {
046        super(ELEMENT, NAMESPACE);
047        setType(Type.get);
048    }
049
050    /**
051     * Creates a new Time instance using the specified calendar instance as
052     * the time value to send.
053     *
054     * @param cal the time value.
055     */
056    public Time(Calendar cal) {
057        super(ELEMENT, NAMESPACE);
058        tzo = XmppDateTime.asString(cal.getTimeZone());
059        // Convert local time to the UTC time.
060        utc = XmppDateTime.formatXEP0082Date(cal.getTime());
061    }
062
063    /**
064     * Returns the local time or <tt>null</tt> if the time hasn't been set.
065     *
066     * @return the local time.
067     */
068    public Date getTime() {
069        if (utc == null) {
070            return null;
071        }
072        Date date = null;
073        try {
074            date = XmppDateTime.parseDate(utc);
075        }
076        catch (Exception e) {
077            LOGGER.log(Level.SEVERE, "Error getting local time", e);
078        }
079        return date;
080    }
081
082    /**
083     * Sets the time using the local time.
084     *
085     * @param time the current local time.
086     */
087    public void setTime(Date time) {
088    }
089
090    /**
091     * Returns the time as a UTC formatted String using the format CCYY-MM-DDThh:mm:ssZ.
092     *
093     * @return the time as a UTC formatted String.
094     */
095    public String getUtc() {
096        return utc;
097    }
098
099    /**
100     * Sets the time using UTC formatted String in the format CCYY-MM-DDThh:mm:ssZ.
101     *
102     * @param utc the time using a formatted String.
103     */
104    public void setUtc(String utc) {
105        this.utc = utc;
106    }
107
108    /**
109     * Returns the time zone.
110     *
111     * @return the time zone.
112     */
113    public String getTzo() {
114        return tzo;
115    }
116
117    /**
118     * Sets the time zone offset.
119     *
120     * @param tzo the time zone offset.
121     */
122    public void setTzo(String tzo) {
123        this.tzo = tzo;
124    }
125
126    public static Time createResponse(IQ request) {
127        Time time = new Time(Calendar.getInstance());
128        time.setType(Type.result);
129        time.setTo(request.getFrom());
130        return time;
131    }
132
133    @Override
134    protected IQChildElementXmlStringBuilder getIQChildElementBuilder(IQChildElementXmlStringBuilder buf) {
135        if (utc != null) {
136            buf.rightAngleBracket();
137            buf.append("<utc>").append(utc).append("</utc>");
138            buf.append("<tzo>").append(tzo).append("</tzo>");
139        } else {
140            buf.setEmptyElement();
141        }
142
143        return buf;
144    }
145}