/** * $RCSfile$ * $Revision$ * $Date$ * * Copyright (C) 2004 Jive Software. All rights reserved. * * This software is published under the terms of the GNU Public License (GPL), * a copy of which is included in this distribution. */ package org.jivesoftware.messenger.muc.spi; import java.util.*; import java.util.concurrent.ConcurrentHashMap; import org.dom4j.Element; import org.jivesoftware.messenger.muc.*; import org.jivesoftware.util.*; import org.jivesoftware.messenger.*; import org.jivesoftware.messenger.auth.UnauthorizedException; import org.jivesoftware.messenger.user.UserAlreadyExistsException; import org.jivesoftware.messenger.user.UserNotFoundException; import org.xmpp.packet.*; /** * Implementation of MUCUser. There will be a MUCUser per user that is connected to one or more * rooms. A MUCUser contains a collection of MUCRoles for each room where the user has joined. * * @author Gaston Dombiak */ public class MUCUserImpl implements MUCUser { /** The chat server this user belongs to. */ private MultiUserChatServer server; /** Real system XMPPAddress for the user. */ private JID realjid; /** Table: key roomName.toLowerCase(); value MUCRole. */ private Map<String, MUCRole> roles = new ConcurrentHashMap<String, MUCRole>(); /** Deliver packets to users. */ private PacketRouter router; /** * Time of last packet sent. */ private long lastPacketTime; /** * Create a new chat user. * * @param chatserver the server the user belongs to. * @param packetRouter the router for sending packets from this user. * @param jid the real address of the user */ MUCUserImpl(MultiUserChatServerImpl chatserver, PacketRouter packetRouter, JID jid) { this.realjid = jid; this.router = packetRouter; this.server = chatserver; } public long getID() { return -1; } public MUCRole getRole(String roomName) throws NotFoundException { MUCRole role = roles.get(roomName.toLowerCase()); if (role == null) { throw new NotFoundException(roomName); } return role; } public Iterator<MUCRole> getRoles() { return Collections.unmodifiableCollection(roles.values()).iterator(); } public void removeRole(String roomName) { roles.remove(roomName.toLowerCase()); } public long getLastPacketTime() { return lastPacketTime; } /** * Generate a conflict packet to indicate that the nickname being requested/used is already in * use by another user. * * @param packet the packet to be bounced. */ private void sendErrorPacket(Packet packet, PacketError.Condition error) { if (packet instanceof IQ) { IQ reply = IQ.createResultIQ((IQ) packet); reply.setChildElement(((IQ) packet).getChildElement().createCopy()); reply.setError(error); router.route(reply); } else { Packet reply = packet.createCopy(); reply.setError(error); reply.setFrom(packet.getTo()); reply.setTo(packet.getFrom()); router.route(reply); } } public JID getAddress() { return realjid; } public void process(Packet packet) throws UnauthorizedException, PacketException { if (packet instanceof IQ) { process((IQ)packet); } else if (packet instanceof Message) { process((Message)packet); } else if (packet instanceof Presence) { process((Presence)packet); } } /** * This method does all packet routing in the chat server. Packet routing is actually very * simple: * * <ul> * <li>Discover the room the user is talking to (server packets are dropped)</li> * <li>If the room is not registered and this is a presence "available" packet, try to join the * room</li> * <li>If the room is registered, and presence "unavailable" leave the room</li> * <li>Otherwise, rewrite the sender address and send to the room.</li> * </ul> * * @param packet The packet to route. */ public void process(Message packet) { // Ignore messages of type ERROR sent to a room if (Message.Type.error == packet.getType()) { return; } lastPacketTime = System.currentTimeMillis(); JID recipient = packet.getTo(); String group = recipient.getNode(); if (group == null) { // Ignore packets to the groupchat server // In the future, we'll need to support TYPE_IQ queries to the server for MUC Log.info(LocaleUtils.getLocalizedString("muc.error.not-supported") + " " + packet.toString()); } else { MUCRole role = roles.get(group.toLowerCase()); if (role == null) { if (server.hasChatRoom(group)) { boolean declinedInvitation = false; Element userInfo = null; if (Message.Type.normal == packet.getType()) { // An user that is not an occupant could be declining an invitation userInfo = packet.getChildElement( "x", "http://jabber.org/protocol/muc#user"); if (userInfo != null && userInfo.element("decline") != null) { // A user has declined an invitation to a room // WARNING: Potential fraud if someone fakes the "from" of the // message with the JID of a member and sends a "decline" declinedInvitation = true; } } if (declinedInvitation) { Element info = userInfo.element("decline"); server.getChatRoom(group).sendInvitationRejection( new JID(info.attributeValue("to")), info.elementTextTrim("reason"), packet.getFrom()); } else { // The sender is not an occupant of the room sendErrorPacket(packet, PacketError.Condition.not_acceptable); } } else { // The sender is not an occupant of a NON-EXISTENT room!!! sendErrorPacket(packet, PacketError.Condition.recipient_unavailable); } } else { // Check and reject conflicting packets with conflicting roles // In other words, another user already has this nickname if (!role.getChatUser().getAddress().equals(packet.getFrom())) { sendErrorPacket(packet, PacketError.Condition.conflict); } else { try { if (packet.getSubject() != null && packet.getSubject().trim().length() > 0 && Message.Type.groupchat == packet.getType()) { // An occupant is trying to change the room's subject role.getChatRoom().changeSubject(packet, role); } else { // An occupant is trying to send a private, send public message, // invite someone to the room or reject an invitation Message.Type type = packet.getType(); String resource = packet.getTo().getResource(); if (resource == null || resource.trim().length() == 0) { resource = null; } if (resource == null && Message.Type.groupchat == type) { // An occupant is trying to send a public message role.getChatRoom().sendPublicMessage(packet, role); } else if (resource != null && (Message.Type.chat == type || Message.Type.normal == type)) { // An occupant is trying to send a private message role.getChatRoom().sendPrivateMessage(packet, role); } else if (resource == null && Message.Type.normal == type) { // An occupant could be sending an invitation or declining an // invitation Element userInfo = packet.getChildElement( "x", "http://jabber.org/protocol/muc#user"); // Real real real UGLY TRICK!!! Will and MUST be solved when // persistence will be added. Replace locking with transactions! MUCRoomImpl room = (MUCRoomImpl) role.getChatRoom(); if (userInfo != null && userInfo.element("invite") != null) { // An occupant is sending an invitation Element info = userInfo.element("invite"); // Add the user as a member of the room if the room is // members only if (room.isMembersOnly()) { room.lock.writeLock().lock(); try { room.addMember(info.attributeValue("to"), null, role); } finally { room.lock.writeLock().unlock(); } } // Try to keep the list of extensions sent together with the // message invitation. These extensions will be sent to the // invitee. List<Element> extensions = new ArrayList<Element>(packet .getElement().elements()); extensions.remove(userInfo); // Send the invitation to the user room.sendInvitation(new JID(info.attributeValue("to")), info.elementTextTrim("reason"), role, extensions); } else if (userInfo != null && userInfo.element("decline") != null) { // An occupant has declined an invitation Element info = userInfo.element("decline"); room.sendInvitationRejection(new JID(info.attributeValue("to")), info.elementTextTrim("reason"), packet.getFrom()); } else { sendErrorPacket(packet, PacketError.Condition.bad_request); } } else { sendErrorPacket(packet, PacketError.Condition.bad_request); } } } catch (ForbiddenException e) { sendErrorPacket(packet, PacketError.Condition.forbidden); } catch (NotFoundException e) { sendErrorPacket(packet, PacketError.Condition.recipient_unavailable); } catch (ConflictException e) { sendErrorPacket(packet, PacketError.Condition.conflict); } } } } } public void process(IQ packet) { lastPacketTime = System.currentTimeMillis(); JID recipient = packet.getTo(); String group = recipient.getNode(); if (group == null) { // Ignore packets to the groupchat server // In the future, we'll need to support TYPE_IQ queries to the server for MUC Log.info(LocaleUtils.getLocalizedString("muc.error.not-supported") + " " + packet.toString()); } else { MUCRole role = roles.get(group.toLowerCase()); if (role == null) { // TODO: send error message to user (can't send packets to group you haven't // joined) } else { // Check and reject conflicting packets with conflicting roles // In other words, another user already has this nickname if (!role.getChatUser().getAddress().equals(packet.getFrom())) { sendErrorPacket(packet, PacketError.Condition.conflict); } else { try { Element query = packet.getElement().element("query"); if (query != null && "http://jabber.org/protocol/muc#owner".equals(query.getNamespaceURI())) { role.getChatRoom().getIQOwnerHandler().handleIQ(packet, role); } else if (query != null && "http://jabber.org/protocol/muc#admin".equals(query.getNamespaceURI())) { role.getChatRoom().getIQAdminHandler().handleIQ(packet, role); } else { sendErrorPacket(packet, PacketError.Condition.bad_request); } } catch (ForbiddenException e) { sendErrorPacket(packet, PacketError.Condition.forbidden); } catch (ConflictException e) { sendErrorPacket(packet, PacketError.Condition.conflict); } catch (NotAllowedException e) { sendErrorPacket(packet, PacketError.Condition.not_allowed); } } } } } public void process(Presence packet) { lastPacketTime = System.currentTimeMillis(); JID recipient = packet.getTo(); String group = recipient.getNode(); if (group == null) { if (Presence.Type.unavailable == packet.getType()) { server.removeUser(packet.getFrom()); } } else { MUCRole role = roles.get(group.toLowerCase()); if (role == null) { // If we're not already in a room, we either are joining it or it's not // properly addressed and we drop it silently if (recipient.getResource() != null && recipient.getResource().trim().length() > 0) { if (packet.isAvailable()) { try { // Get or create the room MUCRoom room = server.getChatRoom(group, packet.getFrom()); // User must support MUC in order to create a room Element mucInfo = packet.getChildElement("x", "http://jabber.org/protocol/muc"); HistoryRequest historyRequest = null; String password = null; // Check for password & requested history if client supports MUC if (mucInfo != null) { password = mucInfo.elementTextTrim("password"); if (mucInfo.element("history") != null) { historyRequest = new HistoryRequest(mucInfo); } } // The user joins the room role = room.joinRoom(recipient.getResource().trim(), password, historyRequest, this, packet.createCopy()); roles.put(group.toLowerCase(), role); // If the client that created the room is non-MUC compliant then // unlock the room thus creating an "instant" room if (mucInfo == null && room.isLocked() && !room.isManuallyLocked()) { room.unlock(role); } } catch (UnauthorizedException e) { sendErrorPacket(packet, PacketError.Condition.not_authorized); } catch (ServiceUnavailableException e) { sendErrorPacket(packet, PacketError.Condition.service_unavailable); } catch (UserAlreadyExistsException e) { sendErrorPacket(packet, PacketError.Condition.conflict); } catch (RoomLockedException e) { sendErrorPacket(packet, PacketError.Condition.recipient_unavailable); } catch (ForbiddenException e) { sendErrorPacket(packet, PacketError.Condition.forbidden); } catch (RegistrationRequiredException e) { sendErrorPacket(packet, PacketError.Condition.registration_required); } catch (ConflictException e) { sendErrorPacket(packet, PacketError.Condition.conflict); } } else { // TODO: send error message to user (can't send presence to group you // haven't joined) } } else { if (packet.isAvailable()) { // A resource is required in order to join a room sendErrorPacket(packet, PacketError.Condition.bad_request); } // TODO: send error message to user (can't send packets to group you haven't // joined) } } else { // Check and reject conflicting packets with conflicting roles // In other words, another user already has this nickname if (!role.getChatUser().getAddress().equals(packet.getFrom())) { sendErrorPacket(packet, PacketError.Condition.conflict); } else { if (Presence.Type.unavailable == packet.getType()) { try { roles.remove(group.toLowerCase()); role.getChatRoom().leaveRoom(role.getNickname()); } catch (UserNotFoundException e) { // Do nothing since the users has already left the room } catch (Exception e) { Log.error(e); } } else { try { String resource = (recipient.getResource() == null || recipient.getResource().trim().length() == 0 ? null : recipient.getResource().trim()); if (resource == null || role.getNickname().equalsIgnoreCase(resource)) { // Occupant has changed his availability status role.setPresence(packet.createCopy()); role.getChatRoom().send(role.getPresence().createCopy()); } else { // Occupant has changed his nickname. Send two presences // to each room occupant // Answer a conflic error if the new nickname is taken if (role.getChatRoom().hasOccupant(resource)) { sendErrorPacket(packet, PacketError.Condition.conflict); } else { // Send "unavailable" presence for the old nickname Presence presence = role.getPresence().createCopy(); // Switch the presence to OFFLINE presence.setType(Presence.Type.unavailable); presence.setStatus(null); // Add the new nickname and status 303 as properties Element frag = presence.getChildElement("x", "http://jabber.org/protocol/muc#user"); frag.element("item").addAttribute("nick", resource); frag.addElement("status").addAttribute("code", "303"); role.getChatRoom().send(presence); // Send availability presence for the new nickname String oldNick = role.getNickname(); role.setPresence(packet.createCopy()); role.changeNickname(resource); role.getChatRoom().nicknameChanged(oldNick, resource); role.getChatRoom().send(role.getPresence().createCopy()); } } } catch (Exception e) { Log.error(LocaleUtils.getLocalizedString("admin.error"), e); } } } } } } }