Added Last Activity Support(JEP-012) to allow for retrieval of idle times.

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@2820 b35dd754-fafc-0310-a699-88a17e54d16e

build/resources/META-INF/smack.providers

@@ -128,4 +128,11 @@
         <className>org.jivesoftware.smack.packet.Bind$Provider</className>
     </iqProvider>
 
+     <!-- Last Activity -->
+    <iqProvider>
+        <elementName>query</elementName>
+        <namespace>jabber:iq:last</namespace>
+        <className>org.jivesoftware.smackx.packet.LastActivity$Provider</className> 
+    </iqProvider>
+
 </smackProviders>

source/org/jivesoftware/smackx/packet/LastActivity.java

@@ -0,0 +1,155 @@
+/**
+ * $RCSfile$
+ * $Revision: 2407 $
+ * $Date: 2004-11-02 15:37:00 -0800 (Tue, 02 Nov 2004) $
+ *
+ * Copyright 2003-2004 Jive Software.
+ *
+ * All rights reserved. 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 org.jivesoftware.smackx.packet;
+
+import org.jivesoftware.smack.PacketCollector;
+import org.jivesoftware.smack.SmackConfiguration;
+import org.jivesoftware.smack.XMPPConnection;
+import org.jivesoftware.smack.XMPPException;
+import org.jivesoftware.smack.filter.PacketIDFilter;
+import org.jivesoftware.smack.packet.IQ;
+import org.jivesoftware.smack.provider.IQProvider;
+import org.xmlpull.v1.XmlPullParser;
+
+/**
+ * A last activity IQ for retrieving information about the last activity associated with a Jabber ID.
+ * LastActivity (JEP-012) allows for retrieval of how long a particular user has been idle and the
+ * message the specified when doing so.
+ * To get the last activity of a user, simple send the LastActivity packet to them, as in the
+ * following code example:
+ * <p/>
+ * <pre>
+ * XMPPConnection con = new XMPPConnection("jabber.org");
+ * con.login("john", "doe");
+ * LastActivity activity = LastActivity.getLastActivity(con, "xray@jabber.org");
+ * </pre>
+ *
+ * @author Derek DeMoro
+ */
+public class LastActivity extends IQ {
+
+    public long lastActivity;
+    public String message;
+
+    public LastActivity() {
+        setType(IQ.Type.GET);
+    }
+
+    public String getChildElementXML() {
+        StringBuffer buf = new StringBuffer();
+        buf.append("<query xmlns=\"jabber:iq:last\"></query>");
+        return buf.toString();
+    }
+
+
+    private void setLastActivity(long lastActivity) {
+        this.lastActivity = lastActivity;
+    }
+
+
+    private void setMessage(String message) {
+        this.message = message;
+    }
+
+    /**
+     * Returns number of seconds that have passed since the user last logged out.
+     * If the user is offline, 0 will be returned.
+     *
+     * @return the number of seconds that have passed since the user last logged out.
+     */
+    public long getLastActivity() {
+        return lastActivity;
+    }
+
+
+    /**
+     * Returns the status message of the last unavailable presence received from the user.
+     *
+     * @return the status message of the last unavailable presence received from the user
+     */
+    public String getStatusMessage() {
+        return message;
+    }
+
+
+    /**
+     * The IQ Provider for LastActivity.
+     *
+     * @author Derek DeMoro
+     */
+    public static class Provider implements IQProvider {
+
+        public Provider() {
+            super();
+        }
+
+        public IQ parseIQ(XmlPullParser parser) throws Exception {
+            if (parser.getEventType() != XmlPullParser.START_TAG) {
+                throw new IllegalStateException("Parser not in proper position, or bad XML.");
+            }
+
+            LastActivity lastActivity = new LastActivity();
+            try {
+                String seconds = parser.getAttributeValue("", "seconds");
+                String message = parser.nextText();
+                if (seconds != null) {
+                    lastActivity.setLastActivity(Long.parseLong(seconds));
+                }
+
+                if (message != null) {
+                    lastActivity.setMessage(message);
+                }
+            }
+            catch (Exception e) {
+                e.printStackTrace();
+            }
+            return lastActivity;
+        }
+    }
+
+    /**
+     * Retrieve the last activity of a particular jid.
+     * @param con the current XMPPConnection.
+     * @param jid the JID of the user.
+     * @return the LastActivity packet of the jid.
+     * @throws XMPPException thrown if a server error has occured.
+     */
+    public static LastActivity getLastActivity(XMPPConnection con, String jid) throws XMPPException {
+        LastActivity activity = new LastActivity();
+        activity.setTo(jid);
+
+        PacketCollector collector = con.createPacketCollector(new PacketIDFilter(activity.getPacketID()));
+        con.sendPacket(activity);
+
+        LastActivity response = (LastActivity) collector.nextResult(SmackConfiguration.getPacketReplyTimeout());
+
+        // Cancel the collector.
+        collector.cancel();
+        if (response == null) {
+            throw new XMPPException("No response from server on status set.");
+        }
+        if (response.getError() != null) {
+            throw new XMPPException(response.getError());
+        }
+        return response;
+    }
+}