OF-347 The domain should add support for Last Activity requests

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@13973 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/openfire/handler/IQLastActivityHandler.java

@@ -60,10 +60,20 @@ public class IQLastActivityHandler extends IQHandler implements ServerFeaturesPr
         String username = packet.getTo() == null ? null : packet.getTo().getNode();
 
         // Check if any of the usernames is null
-        if (sender == null || username == null) {
+        if (sender == null) {
             reply.setError(PacketError.Condition.forbidden);
             return reply;
         }
+        if (username == null) {
+            // http://xmpp.org/extensions/xep-0012.html#server
+            // When the last activity query is sent to a server or component (i.e., to a JID of the form <domain.tld>),
+            // the information contained in the IQ reply reflects the uptime of the JID sending the reply.
+            // The seconds attribute specifies how long the host has been running since it was last (re-)started.
+            long uptime = XMPPServer.getInstance().getServerInfo().getLastStarted().getTime();
+            long lastActivityTime = (System.currentTimeMillis() - uptime) / 1000;
+            lastActivity.addAttribute("seconds", String.valueOf(lastActivityTime));
+            return reply;
+        }
 
         try {
             RosterItem item = rosterManager.getRoster(username).getRosterItem(packet.getFrom());