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 org.jivesoftware.smack.packet.IQ;
020import org.jxmpp.util.XmppDateTime;
021
022import java.util.Calendar;
023import java.util.Date;
024import java.util.logging.Level;
025import java.util.logging.Logger;
026
027/**
028 * A Time IQ packet, which is used by XMPP clients to exchange their respective local
029 * times. Clients that wish to fully support the entity time protocol should register
030 * a PacketListener for incoming time requests that then respond with the local time.
031 *
032 * @see <a href="http://www.xmpp.org/extensions/xep-0202.html">XEP-202</a>
033 * @author Florian Schmaus
034 */
035public class Time extends IQ {
036    public static final String NAMESPACE = "urn:xmpp:time";
037    public static final String ELEMENT = "time";
038
039    private static final Logger LOGGER = Logger.getLogger(Time.class.getName());
040
041    private String utc;
042    private String tzo;
043
044    public Time() {
045        super(ELEMENT, NAMESPACE);
046        setType(Type.get);
047    }
048
049    /**
050     * Creates a new Time instance using the specified calendar instance as
051     * the time value to send.
052     *
053     * @param cal the time value.
054     */
055    public Time(Calendar cal) {
056        super(ELEMENT, NAMESPACE);
057        tzo = XmppDateTime.asString(cal.getTimeZone());
058        // Convert local time to the UTC time.
059        utc = XmppDateTime.formatXEP0082Date(cal.getTime());
060    }
061
062    /**
063     * Returns the local time or <tt>null</tt> if the time hasn't been set.
064     *
065     * @return the local time.
066     */
067    public Date getTime() {
068        if (utc == null) {
069            return null;
070        }
071        Date date = null;
072        try {
073            date = XmppDateTime.parseDate(utc);
074        }
075        catch (Exception e) {
076            LOGGER.log(Level.SEVERE, "Error getting local time", e);
077        }
078        return date;
079    }
080
081    /**
082     * Sets the time using the local time.
083     *
084     * @param time the current local time.
085     */
086    public void setTime(Date time) {
087    }
088
089    /**
090     * Returns the time as a UTC formatted String using the format CCYY-MM-DDThh:mm:ssZ.
091     *
092     * @return the time as a UTC formatted String.
093     */
094    public String getUtc() {
095        return utc;
096    }
097
098    /**
099     * Sets the time using UTC formatted String in the format CCYY-MM-DDThh:mm:ssZ.
100     *
101     * @param utc the time using a formatted String.
102     */
103    public void setUtc(String utc) {
104        this.utc = utc;
105    }
106
107    /**
108     * Returns the time zone.
109     *
110     * @return the time zone.
111     */
112    public String getTzo() {
113        return tzo;
114    }
115
116    /**
117     * Sets the time zone offset.
118     *
119     * @param tzo the time zone offset.
120     */
121    public void setTzo(String tzo) {
122        this.tzo = tzo;
123    }
124
125    public static Time createResponse(IQ request) {
126        Time time = new Time(Calendar.getInstance());
127        time.setType(Type.result);
128        time.setTo(request.getFrom());
129        return time;
130    }
131
132    @Override
133    protected IQChildElementXmlStringBuilder getIQChildElementBuilder(IQChildElementXmlStringBuilder buf) {
134        if (utc != null) {
135            buf.rightAngleBracket();
136            buf.append("<utc>").append(utc).append("</utc>");
137            buf.append("<tzo>").append(tzo).append("</tzo>");
138        } else {
139            buf.setEmptyElement();
140        }
141
142        return buf;
143    }
144}