/*

    BEEM is a videoconference application on the Android Platform.

    Copyright (C) 2009 by Frederic-Charles Barthelery,

                          Jean-Manuel Da Silva,

                          Nikita Kozlov,

                          Philippe Lago,

                          Jean Baptiste Vergely,

                          Vincent Veronis.

    This file is part of BEEM.

    BEEM is free software: you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by

    the Free Software Foundation, either version 3 of the License, or

    (at your option) any later version.

    BEEM 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 General Public License for more details.

    You should have received a copy of the GNU General Public License

    along with BEEM.  If not, see <http://www.gnu.org/licenses/>.

    Please send bug reports with examples or suggestions to

    contact@beem-project.com or http://dev.beem-project.com/

    Epitech, hereby disclaims all copyright interest in the program "Beem"

    written by Frederic-Charles Barthelery,

               Jean-Manuel Da Silva,

               Nikita Kozlov,

               Philippe Lago,

               Jean Baptiste Vergely,

               Vincent Veronis.

    Nicolas Sadirac, November 26, 2009

    President of Epitech.

    Flavien Astraud, November 26, 2009

    Head of the EIP Laboratory.

*/

package com.beem.project.beem.smack.pep;

import java.util.ArrayList;

import java.util.List;

import org.jivesoftware.smack.Connection;

import org.jivesoftware.smack.filter.PacketExtensionFilter;

import org.jivesoftware.smack.filter.PacketFilter;

import org.jivesoftware.smack.PacketListener;

import org.jivesoftware.smack.packet.Packet;

import org.jivesoftware.smackx.pubsub.EventElement;

import org.jivesoftware.smackx.pubsub.EventElementType;

import org.jivesoftware.smackx.pubsub.Item;

import org.jivesoftware.smackx.pubsub.ItemsExtension;

import org.jivesoftware.smackx.pubsub.PubSubManager;

import org.jivesoftware.smackx.pubsub.LeafNode;

/**

 * Little extension of {@link PubSubManager} which allows to add {@link PEPListener}.

 *

 */

public class PepSubManager extends PubSubManager {

    private List<PEPListener> mPepListeners = new ArrayList<PEPListener>();

    private PacketFilter mPacketFilter = new PacketExtensionFilter("event", "http://jabber.org/protocol/pubsub#event");

    /**

     * Create a PepSubManager.

     *

     * @param connection the connection

     */

    public PepSubManager(final Connection connection) {

	super(connection);

	init(connection);

    }

    /**

     * Create a PepSubManager associated to the specified connection where the pubsub

     * requests require a specific to address for packets.

     *

     * @param connection the connection

     * @param toAddress The pubsub specific to address (required for some servers)

     */

    public PepSubManager(final Connection connection, final String toAddress) {

	super(connection, toAddress);

	init(connection);

    }

    /**

     * Add a listener to PEP event.

     *

     * @param listener the listener

     */

    public void addPEPListener(PEPListener listener) {

	if (!mPepListeners.contains(listener))

	    mPepListeners.add(listener);

    }

    /**

     * Remove a listener to PEP event.

     *

     * @param listener the listener

     */

    public void removePEPListener(PEPListener listener) {

	mPepListeners.remove(listener);

    }

    public LeafNode getPEPNode(String nodeName) {

	LeafNode node = new LeafNode(con, nodeName);

	node.setTo(to);

	return node;

    }

    /**

     * Initialize the PepSubManager.

     *

     * @param con the connection

     */

    private void init(Connection con) {

	PacketListener packetListener = new PacketListener() {

	    @Override

	    public void processPacket(Packet packet) {

		EventElement e = (EventElement) packet.getExtension("event", "http://jabber.org/protocol/pubsub#event");

		if (e.getEventType() != EventElementType.items)

		    return;

		ItemsExtension it = (ItemsExtension) e.getEvent();

		if (it.getItemsElementType() != ItemsExtension.ItemsElementType.items)

		    return;

		List<Item> items = (List<Item>) it.getItems();

		firePEPListeners(packet.getFrom(), it.getNode(), items);

	    }

	};

	con.addPacketListener(packetListener, mPacketFilter);

    }

    /**

     * Fire the PEP listeners.

     *

     * @param from the JID of the user who send the event

     * @param node the node of the items in the event

     * @param items the different items of the event

     */

    private void firePEPListeners(String from, String node, List<Item> items) {

	for (PEPListener listener : mPepListeners) {

	    listener.eventReceived(from, node, items);

	}

    }

}