/*
* ((e)) emite: A pure Google Web Toolkit XMPP library
* Copyright (c) 2008-2011 The Emite development team
*
* This file is part of Emite.
*
* Emite is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* Emite is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Emite. If not, see <http://www.gnu.org/licenses/>.
*/
package com.calclab.emite.im.roster;
import static com.google.common.base.Preconditions.checkNotNull;
import javax.annotation.Nullable;
import com.calclab.emite.base.xml.XMLPacket;
import com.calclab.emite.core.XmppNamespaces;
import com.calclab.emite.core.XmppURI;
import com.calclab.emite.core.events.PresenceReceivedEvent;
import com.calclab.emite.core.session.XmppSession;
import com.calclab.emite.core.stanzas.Presence;
import com.calclab.emite.im.events.RosterItemChangedEvent;
import com.calclab.emite.im.events.SubscriptionRequestReceivedEvent;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.google.inject.name.Named;
import com.google.web.bindery.event.shared.EventBus;
import com.google.web.bindery.event.shared.HandlerRegistration;
/**
* @see SubscriptionManager
*/
@Singleton
public class SubscriptionManagerImpl implements SubscriptionManager, PresenceReceivedEvent.Handler, RosterItemChangedEvent.Handler {
private final EventBus eventBus;
private final XmppSession session;
private final XmppRoster roster;
@Inject
protected SubscriptionManagerImpl(@Named("emite") final EventBus eventBus, final XmppSession session, final XmppRoster roster) {
this.eventBus = checkNotNull(eventBus);
this.session = checkNotNull(session);
this.roster = checkNotNull(roster);
session.addPresenceReceivedHandler(this);
roster.addRosterItemChangedHandler(this);
}
@Override
public void onPresenceReceived(final PresenceReceivedEvent event) {
final Presence presence = event.getPresence();
if (presence.getType() == Presence.Type.subscribe) {
final XMLPacket nick = presence.getExtension("nick", XmppNamespaces.NICK);
eventBus.fireEventFromSource(new SubscriptionRequestReceivedEvent(presence.getFrom(), nick.getText()), this);
}
}
@Override
public void onRosterItemChanged(final RosterItemChangedEvent event) {
if (event.isAdded()) {
final RosterItem item = event.getRosterItem();
if (item.getSubscriptionState() == SubscriptionState.none) {
// && item.getAsk() == Type.subscribe) {
requestSubscribe(item.getJID());
item.setSubscriptionState(SubscriptionState.nonePendingIn);
} else if (item.getSubscriptionState() == SubscriptionState.from) {
approveSubscriptionRequest(item.getJID(), item.getName());
item.setSubscriptionState(SubscriptionState.fromPendingOut);
}
}
}
@Override
public HandlerRegistration addSubscriptionRequestReceivedHandler(final SubscriptionRequestReceivedEvent.Handler handler) {
return eventBus.addHandlerToSource(SubscriptionRequestReceivedEvent.TYPE, this, handler);
}
@Override
public void approveSubscriptionRequest(final XmppURI jid, @Nullable final String nick) {
final RosterItem item = roster.getItemByJID(jid);
if (item == null) {
// add the item to the roster
roster.requestAddItem(jid, nick != null ? nick : jid.getNode());
// request a subscription to that entity of the roster
requestSubscribe(jid);
}
// answer "subscribed" to the subscrition request
final Presence presence = new Presence(Presence.Type.subscribed, jid.getJID());
presence.setFrom(session.getCurrentUserURI().getJID());
session.send(presence);
}
@Override
public void cancelSubscription(final XmppURI jid) {
final Presence presence = new Presence(Presence.Type.unsubscribed, jid.getJID());
presence.setFrom(session.getCurrentUserURI().getJID());
session.send(presence);
}
@Override
public void refuseSubscriptionRequest(final XmppURI jid) {
final Presence presence = new Presence(Presence.Type.unsubscribed, jid.getJID());
presence.setFrom(session.getCurrentUserURI().getJID());
session.send(presence);
}
@Override
public void requestSubscribe(final XmppURI jid) {
final Presence presence = new Presence(Presence.Type.subscribe, jid.getJID());
presence.setFrom(session.getCurrentUserURI().getJID());
session.send(presence);
}
@Override
public void unsubscribe(final XmppURI jid) {
final Presence presence = new Presence(Presence.Type.unsubscribe, jid.getJID());
presence.setFrom(session.getCurrentUserURI().getJID());
session.send(presence);
}
}