source: 3thparty/jmessenger/src/nu/fw/jeti/backend/OwnCapabilities.java @ 3952

/* 
 *      Jeti, a Java Jabber client, Copyright (C) 2007 E.S. de Boer  
 *
 *  This program 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 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *      For questions, comments etc, 
 *      use the website at http://jeti.jabberstudio.org
 */

//created on Feb 21, 2007
package nu.fw.jeti.backend;


import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import javax.naming.LinkLoopException;

import nu.fw.jeti.jabber.Backend;
import nu.fw.jeti.jabber.elements.DiscoIdentity;
import nu.fw.jeti.jabber.elements.IQDiscoInfo;
import nu.fw.jeti.jabber.elements.IQXCaps;
import nu.fw.jeti.jabber.elements.InfoQuery;

/**
 * @author eric
 *
 */
public class OwnCapabilities {
        private IQXCaps caps;
        private List features;
        private List coreFeatures;
        private Map capabilities;
        boolean changed = true;
        private Backend backend;
        
        public OwnCapabilities(Backend backend){
                this.backend = backend;
                features = new ArrayList();
                coreFeatures = new ArrayList();
                capabilities = new HashMap();
                addCapability("http://jabber.org/protocol/disco#info");
                //addCapability("jabber:iq:last");
                addCapability("jabber:iq:oob");
                addCapability("jabber:iq:time");
                addCapability("jabber:iq:version");
                addCapability("jabber:x:event");
        }
                        
        public void addCapability(String feature){
                coreFeatures.add(feature);
                features.add(feature);
        }
                        
        
        public void addCapability(String capability,String feature){
                features.add(feature);
                Object cap = capabilities.get(capability);
                if(cap !=null){
                        ((List)cap).add(feature);
                }
                else {
                        List list = new LinkedList();
                        list.add(feature);
                        capabilities.put(list,feature);
                }
                changed = true;
        }
        
        public void removeCapability(String capability,String feature){
                features.remove(feature);
                capabilities.remove(capability);
                changed = true;
        }
        
        private void createCaps(){
                StringBuffer buffer = new StringBuffer();
                for (Iterator i = capabilities.keySet().iterator(); i.hasNext();) {
                        buffer.append(i.next());
                        if(i.hasNext())buffer.append(' ');
                }
                caps = new IQXCaps("http://jeti.jabberstudio.org/caps",
                                                        Start.VERSION,buffer.toString());
        }
                
        /**
         * answers disco#info requests with capabilities info
         * @param iq the Infoquery packet
         * @param info The disco#info packet
         */
        public void answerInfoRequest(InfoQuery iq, IQDiscoInfo info){
                List identities = new LinkedList();
                identities.add(new DiscoIdentity("client","pc",null));
                IQDiscoInfo returnInfo = null;
                String node = info.getNode(); 
                if(("http://jeti.jabberstudio.org/caps#"+Start.VERSION).equals(node)){
                        returnInfo = new IQDiscoInfo(info.getNode(),identities,coreFeatures);
                }
                else if(node!=null && node.startsWith("http://jeti.jabberstudio.org/caps#")){
                        List list =(List) capabilities.get(node.substring(node.lastIndexOf('#')+1,node.length()));
                        if(list!=null) returnInfo = new IQDiscoInfo(node,identities,list);
                }
                else returnInfo = new IQDiscoInfo(node,identities,features);
                
                backend.send(new InfoQuery(iq.getFrom(),"result",iq.getID(),returnInfo));
    }
        
        /**
         * gets a capabilties packet with all correct attributes set
         * @return the capabilities packet
         */
        public IQXCaps getCaps(){
                if(changed){
                        createCaps();
                        changed = false;
                }
                return caps;
        }
        
}