/*
* ((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.xep.chatstate;
import static com.google.common.base.Preconditions.checkNotNull;
import java.util.Map;
import java.util.logging.Logger;
import com.calclab.emite.im.chat.PairChat;
import com.calclab.emite.im.chat.PairChatManager;
import com.calclab.emite.im.events.PairChatChangedEvent;
import com.google.common.collect.Maps;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.google.inject.name.Named;
import com.google.web.bindery.event.shared.EventBus;
/**
* XEP-0085: Chat State Notifications
* http://www.xmpp.org/extensions/xep-0085.html (Version: 1.2)
*
* This implementation is limited to chat conversations. Chat state in MUC rooms
* are not supported to avoid multicast of occupant states (in a BOSH medium can
* be a problem).
*/
@Singleton
public final class ChatStateManager implements PairChatChangedEvent.Handler {
private static final Logger logger = Logger.getLogger(ChatStateManager.class.getName());
private final EventBus eventBus;
private final Map<PairChat, ChatStateHook> hooks;
@Inject
protected ChatStateManager(@Named("emite") final EventBus eventBus, final PairChatManager chatManager) {
this.eventBus = checkNotNull(eventBus);
this.hooks = Maps.newHashMap();
chatManager.addPairChatChangedHandler(this);
}
@Override
public final void onPairChatChanged(final PairChatChangedEvent event) {
if (event.isCreated()) {
getChatStateHook(event.getChat());
} else if (event.isClosed()) {
final PairChat chat = event.getChat();
logger.finer("Removing chat state from chat: " + chat.toString());
final ChatStateHook hook = hooks.get(chat);
if (hook != null && hook.getOtherState() != ChatStateHook.ChatState.gone) {
// We are closing, then we send the gone state
hook.setOwnState(ChatStateHook.ChatState.gone);
}
hooks.remove(chat);
}
}
public final ChatStateHook getChatStateHook(final PairChat chat) {
ChatStateHook hook = hooks.get(checkNotNull(chat));
if (hook == null) {
logger.finer("Adding chat state to chat: " + chat.toString());
hook = new ChatStateHook(eventBus, chat);
hooks.put(chat, hook);
}
return hook;
}
}