public void process(Presence packet) {
// Ignore unavailable presences
if (Presence.Type.unavailable == packet.getType()) {
return;
}
// Examine the packet and check if it has caps info,
// if not -- do nothing by returning.
Element capsElement = packet.getChildElement("c", "http://jabber.org/protocol/caps");
if (capsElement == null) {
return;
}
// Examine the packet and check if it's in legacy format (pre version 1.4
// of XEP-0115). If so, do nothing by returning.
// TODO: if this packet is in legacy format, we SHOULD check the 'node',
// 'ver', and 'ext' combinations as specified in the archived version
// 1.3 of the specification, and cache the results. See JM-1447
final String hashAttribute = capsElement.attributeValue("hash");
if (hashAttribute == null || hashAttribute.trim().length() == 0) {
return;
}
// Examine the packet and check if it has and a 'ver' hash
// if not -- do nothing by returning.
final String newVerAttribute = capsElement.attributeValue("ver");
if (newVerAttribute == null || newVerAttribute.trim().length() == 0) {
return;
}
// Check to see if the 'ver' hash is already in our cache.
if (isInCapsCache(newVerAttribute)) {
// The 'ver' hash is in the cache already, so let's update the
// entityCapabilitiesUserMap for the user that sent the caps
// packet.
entityCapabilitiesUserMap.put(packet.getFrom(), newVerAttribute);
} else {
// The 'ver' hash is not in the cache so send out a disco#info query
// so that we may begin recognizing this 'ver' hash.
IQ iq = new IQ(IQ.Type.get);
iq.setTo(packet.getFrom());
String serverName = XmppServer.getInstance().getServerInfo().getXMPPDomain();
iq.setFrom(serverName);
iq.setChildElement("query", "http://jabber.org/protocol/disco#info");
String packetId = iq.getID();
final EntityCapabilities caps = new EntityCapabilities();
caps.setHashAttribute(hashAttribute);
caps.setVerAttribute(newVerAttribute);
verAttributes.put(packetId, caps);
final IQRouter iqRouter = XmppServer.getInstance().getIQRouter();
iqRouter.addIQResultListener(packetId, this);
iqRouter.route(iq);
}
}
/**
* Deletes a user from all the groups where he/she belongs. The most probable cause for this
* request is that the user has been deleted from the system.
*
* @param user the deleted user from the system.
*/
public void deleteUser(User user) {
JID userJID = XmppServer.getInstance().createJID(user.getUsername(), null);
for (Group group : getGroups(userJID)) {
if (group.getAdmins().contains(userJID)) {
if (group.getAdmins().remove(userJID)) {
// Remove the group from cache.
groupCache.remove(group.getName());
}
} else {
if (group.getMembers().remove(userJID)) {
// Remove the group from cache.
groupCache.remove(group.getName());
}
}
}
}
public void userDeleting(User user, Map<String, Object> params) {
// Delete this user's association in entityCapabilitiesUserMap.
JID jid = XmppServer.getInstance().createJID(user.getUsername(), null, true);
String verHashOfUser = entityCapabilitiesUserMap.remove(jid);
// If there are no other references to the deleted user's 'ver' hash,
// it is safe to remove that 'ver' hash's associated entity
// capabilities from the entityCapabilitiesMap cache.
for (String verHash : entityCapabilitiesUserMap.values()) {
if (verHash.equals(verHashOfUser)) {
// A different user is making use of the deleted user's same
// 'ver' hash, so let's not remove the associated entity
// capabilities from the entityCapabilitiesMap.
return;
}
}
entityCapabilitiesMap.remove(verHashOfUser);
}
/**
* Returns an iterator for all groups that the User is a member of.
*
* @param user the user.
* @return all groups the user belongs to.
*/
public Collection<Group> getGroups(User user) {
return getGroups(XmppServer.getInstance().createJID(user.getUsername(), null, true));
}