/**
* The packet is a typical 'set' or 'get' update targeted at the server. Notice that the set could
* be a roster removal in which case we have to generate a local roster removal update as well as
* a new roster removal to send to the the roster item's owner.
*
* @param packet The packet that triggered this update
* @return Either a response to the roster update or null if the packet is corrupt and the session
* was closed down
*/
private IQ manageRoster(org.xmpp.packet.Roster packet)
throws UnauthorizedException, UserAlreadyExistsException, SharedGroupException {
IQ returnPacket = null;
JID sender = packet.getFrom();
IQ.Type type = packet.getType();
try {
if ((sender.getNode() == null
|| !RosterManager.isRosterServiceEnabled()
|| !userManager.isRegisteredUser(sender.getNode()))
&& IQ.Type.get == type) {
// If anonymous user asks for his roster or roster service is disabled then
// return an empty roster
IQ reply = IQ.createResultIQ(packet);
reply.setChildElement("query", "jabber:iq:roster");
return reply;
}
if (!localServer.isLocal(sender)) {
// Sender belongs to a remote server so discard this IQ request
Log.warn("Discarding IQ roster packet of remote user: " + packet);
return null;
}
Roster cachedRoster = userManager.getUser(sender.getNode()).getRoster();
if (IQ.Type.get == type) {
returnPacket = cachedRoster.getReset();
returnPacket.setType(IQ.Type.result);
returnPacket.setTo(sender);
returnPacket.setID(packet.getID());
// Force delivery of the response because we need to trigger
// a presence probe from all contacts
deliverer.deliver(returnPacket);
returnPacket = null;
} else if (IQ.Type.set == type) {
for (org.xmpp.packet.Roster.Item item : packet.getItems()) {
if (item.getSubscription() == org.xmpp.packet.Roster.Subscription.remove) {
removeItem(cachedRoster, packet.getFrom(), item);
} else {
if (cachedRoster.isRosterItem(item.getJID())) {
// existing item
RosterItem cachedItem = cachedRoster.getRosterItem(item.getJID());
cachedItem.setAsCopyOf(item);
cachedRoster.updateRosterItem(cachedItem);
} else {
// new item
cachedRoster.createRosterItem(item);
}
}
}
returnPacket = IQ.createResultIQ(packet);
}
} catch (UserNotFoundException e) {
throw new UnauthorizedException(e);
}
return returnPacket;
}
/**
* Manage the subscription request. This method updates a user's roster state, storing any changes
* made, and updating the roster owner if changes occured.
*
* @param target The roster target's jid (the item's jid to be changed)
* @param isSending True if the request is being sent by the owner
* @param type The subscription change type (subscribe, unsubscribe, etc.)
* @param roster The Roster that is updated.
* @return <tt>true</tt> if the subscription state has changed.
*/
private boolean manageSub(JID target, boolean isSending, Presence.Type type, Roster roster)
throws UserAlreadyExistsException, SharedGroupException {
RosterItem item = null;
RosterItem.AskType oldAsk;
RosterItem.SubType oldSub = null;
RosterItem.RecvType oldRecv;
boolean newItem = false;
try {
if (roster.isRosterItem(target)) {
item = roster.getRosterItem(target);
} else {
if (Presence.Type.unsubscribed == type
|| Presence.Type.unsubscribe == type
|| Presence.Type.subscribed == type) {
// Do not create a roster item when processing a confirmation of
// an unsubscription or receiving an unsubscription request or a
// subscription approval from an unknown user
return false;
}
item = roster.createRosterItem(target, false, true);
newItem = true;
}
// Get a snapshot of the item state
oldAsk = item.getAskStatus();
oldSub = item.getSubStatus();
oldRecv = item.getRecvStatus();
// Update the item state based in the received presence type
updateState(item, type, isSending);
// Update the roster IF the item state has changed
if (oldAsk != item.getAskStatus()
|| oldSub != item.getSubStatus()
|| oldRecv != item.getRecvStatus()) {
roster.updateRosterItem(item);
} else if (newItem) {
// Do not push items with a state of "None + Pending In"
if (item.getSubStatus() != RosterItem.SUB_NONE
|| item.getRecvStatus() != RosterItem.RECV_SUBSCRIBE) {
roster.broadcast(item, false);
}
}
} catch (UserNotFoundException e) {
// Should be there because we just checked that it's an item
Log.error(LocaleUtils.getLocalizedString("admin.error"), e);
}
return oldSub != item.getSubStatus();
}