package org.klomp.snarkxl;

import java.io.*; //workaround dataloss
//import java.io.File;
import java.io.FileInputStream;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TreeSet;
import java.util.Properties;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.TreeMap;

import net.i2p.I2PAppContext;
import net.i2p.data.Base64;
import net.i2p.data.DataHelper;
import net.i2p.router.RouterContext;
import net.i2p.util.I2PThread;
import net.i2p.util.Log;

/**
 * Manage multiple snarks
 */
public class SnarkManager implements Snark.CompleteListener {
    private static SnarkManager _instance = new SnarkManager();
    public static SnarkManager instance() { return _instance; }
    private boolean xlServletInit = false;
    private String nickname = "UNSET";
    /** map of (canonical) filename to Snark instance (unsynchronized) */
    private Map _snarks;
    private Object _addSnarkLock;
    private String _configFile;
    private Properties _config;
    private I2PAppContext _context;
    private Log _log;
    private List _messages;
    private static final String versionXL = "20090203a";//fwd
    
    public static final String PROP_I2CP_HOST = "i2psnark.i2cpHost";
    public static final String PROP_I2CP_PORT = "i2psnark.i2cpPort";
    public static final String PROP_I2CP_OPTS = "i2psnark.i2cpOptions";
    public static final String PROP_EEP_HOST = "i2psnark.eepHost";
    public static final String PROP_EEP_PORT = "i2psnark.eepPort";
    public static final String PROP_UPLOADERS_TOTAL = "i2psnark.uploaders.total";
    public static final String PROP_UPBW_MAX = "i2psnark.upbw.max";
    public static final String PROP_DIR = "i2psnark.dir";
    public static final String PROP_META_PREFIX = "i2psnark.zmeta.";
    public static final String PROP_META_BITFIELD_SUFFIX = ".bitfield";
    
    public static final String PROP_AUTO_START = "i2snark.autoStart";   // oops
    public static final String DEFAULT_AUTO_START = "false";
    public static final String PROP_USE_OPENTRACKERS = "i2psnark.useOpentrackers";
    public static final String DEFAULT_USE_OPENTRACKERS = "false";
    public static final String PROP_OPENTRACKERS = "i2psnark.opentrackers";
    public static final String DEFAULT_OPENTRACKERS = "http://tracker.welterde.i2p/a";
    
    public static final int MIN_UP_BW = 2;
    public static final int DEFAULT_MAX_UP_BW = 20;
    
    private SnarkManager() {
        _snarks = new HashMap();
        _addSnarkLock = new Object();
        _context = I2PAppContext.getGlobalContext();
        _log = _context.logManager().getLog(SnarkManager.class);
        _messages = new ArrayList(16);
        
        loadConfig("dummyxl.config");
        //int minutes = getStartupDelayMinutes();
        //_messages.add("Adding torrents in " + minutes + (minutes == 1 ? " minute" : " minutes"));
        I2PThread monitor = new I2PThread(new DirMonitor(), "Snark DirMonitor");
        monitor.setDaemon(true);
        monitor.start();
        if (_context instanceof RouterContext)
            ((RouterContext)_context).router().addShutdownTask(new SnarkManagerShutdown());
    }
    
    private static final int MAX_MESSAGES = 5;
    public void addMessage(String message) {
        synchronized (_messages) {
            _messages.add(message);
           /* while (_messages.size() > MAX_MESSAGES)
                _messages.remove(0); */
        }
        if (_log.shouldLog(Log.INFO))
            _log.info("MSG: " + message);
    }
    
    /** newest last */
    public List getMessages() {
        synchronized (_messages) {
            return new ArrayList(_messages);
        }
    }
    
    public boolean shouldAutoStart() {
        return Boolean.valueOf(_config.getProperty(PROP_AUTO_START, DEFAULT_AUTO_START+"")).booleanValue();
    }
    public boolean shouldUseOpenTrackers() {
        return Boolean.valueOf(_config.getProperty(PROP_USE_OPENTRACKERS, DEFAULT_USE_OPENTRACKERS)).booleanValue();
    }
    private int getStartupDelayMinutes() { return 3; }
    public File getDataDir() {
        String dir = _config.getProperty(PROP_DIR);
        if ( (dir == null) || (dir.trim().length() <= 0) )
            dir = "UNSET";
        return new File(dir);
    }
    
    public void loadConfig(String filename) {//fwd since i know this, it was just called once on startup after init sets xlServletInit = true;. if that one day changed we have to care about the logic of xlServletInit! yet i doesn't see that it was called again after the monitoring of torrents started.
        this._configFile = filename;
        if((xlServletInit)){//fwd expecting this is called just once at startup of snark after init sets xlServletInit = true;
            _messages.add("loadConfig " + filename);
        }
        _config = null;
        if (_config == null)
            _config = new Properties();
        File cfg = new File(filename);
        if (cfg.exists()) {
            //fwd: ok, starting here a workaround for the lossing data problem!
            // if the config exists means this client exists before (if multiple clients are used by the user, we can not know that).
            // now let us check if the client last used time was stopped correctly. if so than all is right and the zmeta.datas are proberly valid.
            // if it not was stopped correctly than the zmeta.datas are proberly wrong. (not allways, maybe at last session this file wasn't started at all.
            // if a file is complete we need also not to care. but in case it was removed or deleted we have to care about it's zmeta.datas too!
            // how we do that?! thought best is to write a pid-file - ? //?in the datadir (a datadir should exists because the cfg exists!) ? not yet in datadir
            // we write it in i2p/
            try {
                DataHelper.loadProps(_config, cfg);
                //--------------------------------------------------------------------
                if (_config.containsKey(PROP_DIR)){//part of dataloss workaround
                    if(!getDataDir().getName().equals("UNSET")){//toDo: make a extern methode after testphase
                        File pidfile = new File(nickname + ".pid");
                        if (pidfile.exists()) {// ups! shouldn't exists! proberly the bt-client was not shutdown correctly and the zmeta.datas are wrong!
                            _messages.add("found old pidfile! '" + pidfile + "' proberly '" + nickname + "' was not shutdown correctly!");
                            _messages.add("trying to cleanup all zmeta.datas now!");
                            ArrayList tmpConfig = null;
                            
                            FileReader fin = null;
                            // try { //fwd just to remember when we make a extern methode
                            //------------------ read the old config
                            fin = new FileReader(cfg);
                            BufferedReader in = new BufferedReader(fin);
                            String temp;
                            while ((temp = in.readLine()) != null) {
                                if(tmpConfig == null){
                                    tmpConfig = new ArrayList();
                                }
                                if(tmpConfig != null){
                                    if(!temp.startsWith("i2psnark.zmeta.")){
                                        tmpConfig.add(temp);
                                    }
                                }
                            }
                            fin.close();
                            fin = null;
                            //------------------ write the new config
                            if(tmpConfig != null){
                                
                                FileWriter fout = null;
                                fout = new FileWriter(cfg);
                                PrintWriter out = new PrintWriter(fout);
                                //BufferedWriter out = new BufferedWriter(fout);
                                for(int i = 0; i < tmpConfig.size();i++){
                                    out.println((String)tmpConfig.get(i));
                                }
                                out.close();
                                out = null;
                                _messages.add("cleaned up all zmeta.datas!");
                                
                            }
                            //-------------------- and reload the config
                            _config = null;
                            _config = new Properties();
                            DataHelper.loadProps(_config, cfg);
                            _messages.add("reload config " + filename);
                            //fwd so let's test if this working in the next weeks'
                           /* }catch (java.io.IOException ioe) {
                                _log.error("Error loading I2PSnark config '" + filename + "'", ioe);
                                 _messages.add("Error loading I2PSnark config '" + filename + "'" + ioe);
                                return null;
                            }*/
                            I2PSnarkUtil.instance().setPidfile(pidfile);
                            pidfile.delete(); // delete because proberly this client never starts any tunnel in this session and the config is clean now!
                        }else{// all is like expected
                            // pidfile.createNewFile(); took it out because proberly this client never starts any tunnel in this session and the config is clean now!
                            I2PSnarkUtil.instance().setPidfile(pidfile);
                        }
                        pidfile = null;
                    }
                }
                //--------------------------------------------------------------------
            } catch (IOException ioe) {
                _log.error("Error loading I2PSnark config '" + filename + "'", ioe);
                _messages.add("Error loading I2PSnark config '" + filename + "'" + ioe);
            }
        }
        // now add sane defaults
        if (!_config.containsKey(PROP_I2CP_HOST))
            _config.setProperty(PROP_I2CP_HOST, "localhost");
        if (!_config.containsKey(PROP_I2CP_PORT))
            _config.setProperty(PROP_I2CP_PORT, "7654");
        if (!_config.containsKey(PROP_I2CP_OPTS))
            _config.setProperty(PROP_I2CP_OPTS, "inbound.length=1 inbound.lengthVariance=1 inbound.nickname=" + nickname + " outbound.length=1 outbound.lengthVariance=1 outbound.nickname=" + nickname);
        if (!_config.containsKey(PROP_EEP_HOST))
            _config.setProperty(PROP_EEP_HOST, "localhost");
        if (!_config.containsKey(PROP_EEP_PORT))
            _config.setProperty(PROP_EEP_PORT, "4444");
        if (!_config.containsKey(PROP_UPLOADERS_TOTAL))
            _config.setProperty(PROP_UPLOADERS_TOTAL, "" + Snark.MAX_TOTAL_UPLOADERS);
        if (!_config.containsKey(PROP_UPBW_MAX)) {
            try {
                if (_context instanceof RouterContext)
                    _config.setProperty(PROP_UPBW_MAX, "" + (((RouterContext)_context).bandwidthLimiter().getOutboundKBytesPerSecond() / 2));
                else
                    _config.setProperty(PROP_UPBW_MAX, "" + DEFAULT_MAX_UP_BW);
            } catch (NoClassDefFoundError ncdfe) {
                _config.setProperty(PROP_UPBW_MAX, "" + DEFAULT_MAX_UP_BW);
            }
        }
        if (!_config.containsKey(PROP_DIR))
            _config.setProperty(PROP_DIR, nickname);
        if (!_config.containsKey(PROP_AUTO_START))
            _config.setProperty(PROP_AUTO_START, DEFAULT_AUTO_START);
        updateConfig();
    }
    
    private void updateConfig() {
        String i2cpHost = _config.getProperty(PROP_I2CP_HOST);
        int i2cpPort = getInt(PROP_I2CP_PORT, 7654);
        String opts = _config.getProperty(PROP_I2CP_OPTS);
        Map i2cpOpts = new HashMap();
        if (opts != null) {
            StringTokenizer tok = new StringTokenizer(opts, " ");
            while (tok.hasMoreTokens()) {
                String pair = tok.nextToken();
                int split = pair.indexOf('=');
                if (split > 0)
                    i2cpOpts.put(pair.substring(0, split), pair.substring(split+1));
            }
        }
        if (i2cpHost != null) {
            I2PSnarkUtil.instance().setI2CPConfig(i2cpHost, i2cpPort, i2cpOpts);
            _log.debug("Configuring with I2CP options " + i2cpOpts);
        }
        //I2PSnarkUtil.instance().setI2CPConfig("66.111.51.110", 7654, new Properties());
        String eepHost = _config.getProperty(PROP_EEP_HOST);
        int eepPort = getInt(PROP_EEP_PORT, 4444);
        if (eepHost != null)
            I2PSnarkUtil.instance().setProxy(eepHost, eepPort);
        I2PSnarkUtil.instance().setMaxUploaders(getInt(PROP_UPLOADERS_TOTAL, Snark.MAX_TOTAL_UPLOADERS));
        I2PSnarkUtil.instance().setMaxUpBW(getInt(PROP_UPBW_MAX, DEFAULT_MAX_UP_BW));
        if(!getDataDir().getName().equals("UNSET")){//fwd, yet the app isn't inited correctly. try it next time! but .. i'm sure that one day somebody name the the datadir reasonly  "UNSET" for the files. greetings to Murphy!
            getDataDir().mkdirs();
        }
    }
    
    private int getInt(String prop, int defaultVal) {
        String p = _config.getProperty(prop);
        try {
            if ( (p != null) && (p.trim().length() > 0) )
                return  Integer.parseInt(p.trim());
        } catch (NumberFormatException nfe) {
            // ignore
        }
        return defaultVal;
    }
    
    public void updateConfig(String dataDir, boolean autoStart, String seedPct, String eepHost,
            String eepPort, String i2cpHost, String i2cpPort, String i2cpOpts,
            String upLimit, String upBW, boolean useOpenTrackers, String openTrackers) {
        boolean changed = false;
        if (eepHost != null) {
            int port = I2PSnarkUtil.instance().getEepProxyPort();
            try { port = Integer.parseInt(eepPort); } catch (NumberFormatException nfe) {}
            String host = I2PSnarkUtil.instance().getEepProxyHost();
            if ( (eepHost.trim().length() > 0) && (port > 0) &&
                    ((!host.equals(eepHost) || (port != I2PSnarkUtil.instance().getEepProxyPort()) )) ) {
                I2PSnarkUtil.instance().setProxy(eepHost, port);
                changed = true;
                _config.setProperty(PROP_EEP_HOST, eepHost);
                _config.setProperty(PROP_EEP_PORT, eepPort+"");
                addMessage("EepProxy location changed to " + eepHost + ":" + port);
            }
        }
        if (upLimit != null) {
            int limit = I2PSnarkUtil.instance().getMaxUploaders();
            try { limit = Integer.parseInt(upLimit); } catch (NumberFormatException nfe) {}
            if ( limit != I2PSnarkUtil.instance().getMaxUploaders()) {
                if ( limit >= Snark.MIN_TOTAL_UPLOADERS ) {
                    I2PSnarkUtil.instance().setMaxUploaders(limit);
                    changed = true;
                    _config.setProperty(PROP_UPLOADERS_TOTAL, "" + limit);
                    addMessage("Total uploaders limit changed to " + limit);
                } else {
                    addMessage("Minimum total uploaders limit is " + Snark.MIN_TOTAL_UPLOADERS);
                }
            }
        }
        if (upBW != null) {
            int limit = I2PSnarkUtil.instance().getMaxUpBW();
            try { limit = Integer.parseInt(upBW); } catch (NumberFormatException nfe) {}
            if ( limit != I2PSnarkUtil.instance().getMaxUpBW()) {
                if ( limit >= MIN_UP_BW ) {
                    I2PSnarkUtil.instance().setMaxUpBW(limit);
                    changed = true;
                    _config.setProperty(PROP_UPBW_MAX, "" + limit);
                    addMessage("Up BW limit changed to " + limit + "KBps");
                } else {
                    addMessage("Minimum Up BW limit is " + MIN_UP_BW + "KBps");
                }
            }
        }
        if (i2cpHost != null) {
            int oldI2CPPort = I2PSnarkUtil.instance().getI2CPPort();
            String oldI2CPHost = I2PSnarkUtil.instance().getI2CPHost();
            int port = oldI2CPPort;
            try { port = Integer.parseInt(i2cpPort); } catch (NumberFormatException nfe) {}
            String host = oldI2CPHost;
            Map opts = new HashMap();
            if (i2cpOpts == null) i2cpOpts = "";
            StringTokenizer tok = new StringTokenizer(i2cpOpts, " \t\n");
            while (tok.hasMoreTokens()) {
                String pair = tok.nextToken();
                int split = pair.indexOf('=');
                if (split > 0)
                    opts.put(pair.substring(0, split), pair.substring(split+1));
            }
            Map oldOpts = new HashMap();
            String oldI2CPOpts = _config.getProperty(PROP_I2CP_OPTS);
            if (oldI2CPOpts == null) oldI2CPOpts = "";
            tok = new StringTokenizer(oldI2CPOpts, " \t\n");
            while (tok.hasMoreTokens()) {
                String pair = tok.nextToken();
                int split = pair.indexOf('=');
                if (split > 0)
                    oldOpts.put(pair.substring(0, split), pair.substring(split+1));
            }
            
            if ( (i2cpHost.trim().length() > 0) && (port > 0) &&
                    ((!host.equals(i2cpHost) ||
                    (port != I2PSnarkUtil.instance().getI2CPPort()) ||
                    (!oldOpts.equals(opts)))) ) {
                boolean snarksActive = false;
                Set names = listTorrentFiles();
                for (Iterator iter = names.iterator(); iter.hasNext(); ) {
                    Snark snark = getTorrent((String)iter.next());
                    if ( (snark != null) && (!snark.stopped) ) {
                        snarksActive = true;
                        break;
                    }
                }
                if (snarksActive) {
                    addMessage("Cannot change the I2CP settings while torrents are active");
                    _log.debug("i2cp host [" + i2cpHost + "] i2cp port " + port + " opts [" + opts
                            + "] oldOpts [" + oldOpts + "]");
                } else {
                    if (I2PSnarkUtil.instance().connected()) {
                        I2PSnarkUtil.instance().disconnect();
                        addMessage("Disconnecting old I2CP destination");
                    }
                    Properties p = new Properties();
                    p.putAll(opts);
                    addMessage("I2CP settings changed to " + i2cpHost + ":" + port + " (" + i2cpOpts.trim() + ")");
                    I2PSnarkUtil.instance().setI2CPConfig(i2cpHost, port, p);
                    boolean ok = I2PSnarkUtil.instance().connect();
                    if (!ok) {
                        addMessage("Unable to connect with the new settings, reverting to the old I2CP settings");
                        I2PSnarkUtil.instance().setI2CPConfig(oldI2CPHost, oldI2CPPort, oldOpts);
                        ok = I2PSnarkUtil.instance().connect();
                        if (!ok)
                            addMessage("Unable to reconnect with the old settings!");
                    } else {
                        addMessage("Reconnected on the new I2CP destination");
                        _config.setProperty(PROP_I2CP_HOST, i2cpHost.trim());
                        _config.setProperty(PROP_I2CP_PORT, "" + port);
                        _config.setProperty(PROP_I2CP_OPTS, i2cpOpts.trim());
                        changed = true;
                        // no PeerAcceptors/I2PServerSockets to deal with, since all snarks are inactive
                        for (Iterator iter = names.iterator(); iter.hasNext(); ) {
                            String name = (String)iter.next();
                            Snark snark = getTorrent(name);
                            if ( (snark != null) && (snark.acceptor != null) ) {
                                snark.acceptor.restart();
                                addMessage("I2CP listener restarted for " + snark.meta.getName());
                            }
                        }
                    }
                }
                changed = true;
            }
        }
        if (shouldAutoStart() != autoStart) {
            _config.setProperty(PROP_AUTO_START, autoStart + "");
            addMessage("Adjusted autostart to " + autoStart);
            changed = true;
        }
        if (shouldUseOpenTrackers() != useOpenTrackers) {
            _config.setProperty(PROP_USE_OPENTRACKERS, useOpenTrackers + "");
            addMessage((useOpenTrackers ? "En" : "Dis") + "abled open trackers - torrent restart required to take effect");
            changed = true;
        }
        if (openTrackers != null) {
            if (openTrackers.trim().length() > 0 && !openTrackers.trim().equals(getOpenTrackerString())) {
                _config.setProperty(PROP_OPENTRACKERS, openTrackers.trim());
                addMessage("Open Tracker list changed - torrent restart required to take effect");
                changed = true;
            }
        }
        if (changed) {
            saveConfig();
        } else {
            addMessage("Configuration unchanged");
        }
    }
    
    public void saveConfig() {
        try {
            synchronized (_configFile) {
                DataHelper.storeProps(_config, new File(_configFile));
            }
        } catch (IOException ioe) {
            addMessage("Unable to save the config to '" + _configFile + "'");
        }
    }
    
    public Properties getConfig() { return _config; }
    
    /** hardcoded for sanity.  perhaps this should be customizable, for people who increase their ulimit, etc. */
    private static final int MAX_FILES_PER_TORRENT = -1;//128;
    
    /** set of filenames that we are dealing with */
    public Set listTorrentFiles() { synchronized (_snarks) { return new HashSet(_snarks.keySet()); } }
    /**
     * Grab the torrent given the (canonical) filename
     */
    public Snark getTorrent(String filename) { synchronized (_snarks) { return (Snark)_snarks.get(filename); } }
    public void addTorrent(String filename) { addTorrent(filename, false); }
    public void addTorrent(String filename, boolean dontAutoStart) {
        if ((!dontAutoStart) && !I2PSnarkUtil.instance().connected()) {
            addMessage("Connecting to I2P");
            boolean ok = I2PSnarkUtil.instance().connect();
            if (!ok) {
                addMessage("Error connecting to I2P - check your I2CP settings");
                return;
            }
        }
        File sfile = new File(filename);
        try {
            filename = sfile.getCanonicalPath();
        } catch (IOException ioe) {
            _log.error("Unable to add the torrent " + filename, ioe);
            addMessage("ERR: Could not add the torrent '" + filename + "': " + ioe.getMessage());
            return;
        }
        File dataDir = getDataDir();
        Snark torrent = null;
        synchronized (_snarks) {
            torrent = (Snark)_snarks.get(filename);
        }
        // don't hold the _snarks lock while verifying the torrent
        if (torrent == null) {
            synchronized (_addSnarkLock) {
                // double-check
                synchronized (_snarks) {
                    if(_snarks.get(filename) != null)
                        return;
                }
                
                FileInputStream fis = null;
                try {
                    fis = new FileInputStream(sfile);
                    MetaInfo info = new MetaInfo(fis);
                    fis.close();
                    fis = null;
                    
                    String rejectMessage = locked_validateTorrent(info);
                    if (rejectMessage != null) {
                        sfile.delete();
                        addMessage(rejectMessage);
                        return;
                    } else {
                        torrent = new Snark(filename, null, -1, null, null, false, dataDir.getPath());
                        torrent.completeListener = this;
                        synchronized (_snarks) {
                            _snarks.put(filename, torrent);
                        }
                    }
                } catch (IOException ioe) {
                    addMessage("Torrent in " + sfile.getName() + " is invalid: " + ioe.getMessage());
                    if (sfile.exists())
                        sfile.delete();
                    return;
                } finally {
                    if (fis != null) try { fis.close(); } catch (IOException ioe) {}
                }
            }
        } else {
            return;
        }
        // ok, snark created, now lets start it up or configure it further
        File f = new File(filename);
        if (!dontAutoStart && shouldAutoStart()) {
            torrent.startTorrent();
            addMessage("Torrent added and started: '" + f.getName() + "'");
        } else {
            addMessage("Torrent added: '" + f.getName() + "'");
        }
    }
    
    /**
     * Get the timestamp for a torrent from the config file
     */
    public long getSavedTorrentTime(MetaInfo metainfo) {
        byte[] ih = metainfo.getInfoHash();
        String infohash = Base64.encode(ih);
        infohash = infohash.replace('=', '$');
        String time = _config.getProperty(PROP_META_PREFIX + infohash + PROP_META_BITFIELD_SUFFIX);
        if (time == null)
            return 0;
        int comma = time.indexOf(',');
        if (comma <= 0)
            return 0;
        time = time.substring(0, comma);
        try { return Long.parseLong(time); } catch (NumberFormatException nfe) {}
        return 0;
    }
    
    /**
     * Get the saved bitfield for a torrent from the config file.
     * Convert "." to a full bitfield.
     */
    public BitField getSavedTorrentBitField(MetaInfo metainfo) {
        byte[] ih = metainfo.getInfoHash();
        String infohash = Base64.encode(ih);
        infohash = infohash.replace('=', '$');
        String bf = _config.getProperty(PROP_META_PREFIX + infohash + PROP_META_BITFIELD_SUFFIX);
        if (bf == null)
            return null;
        int comma = bf.indexOf(',');
        if (comma <= 0)
            return null;
        bf = bf.substring(comma + 1).trim();
        int len = metainfo.getPieces();
        if (bf.equals(".")) {
            BitField bitfield = new BitField(len);
            for (int i = 0; i < len; i++)
                bitfield.set(i);
            return bitfield;
        }
        byte[] bitfield = Base64.decode(bf);
        if (bitfield == null)
            return null;
        if (bitfield.length * 8 < len)
            return null;
        return new BitField(bitfield, len);
    }
    
    /**
     * XL
     * Get the storaged bitfield for a torrent.
     * and return the byte[] of it.
     */
    public Snark getTorrentByMetaInfoHash(String metainfohash) {
        MetaInfo metainfo = null;
        //BitField bf = null;
        Snark snark = null;
        Set files = listTorrentFiles();
        TreeSet fileNames = new TreeSet(files); // sorts it alphabetically
        //ArrayList rv = new ArrayList(fileNames.size());
        for (Iterator iter = fileNames.iterator(); iter.hasNext(); ) {
            String name = (String)iter.next();
            snark = getTorrent(name);
            if (snark != null){
                String mhash = Base64.encode(snark.meta.getInfoHash());
                if(mhash.equals(metainfohash)){
                //    bf = snark.storage.getBitField();
                    //metainfo = snark.meta;
                    break;
                }
            }else {
                _log.error("snark for metainfohash = null" + metainfohash);
            }
        }
        // if(metainfo == null)return null;
        //BitField bf =  getSavedTorrentBitField( metainfo) ;
        // if (bf == null) return null;
        return snark;
    }
    /**
     * XL
     * Get the storaged bitfield for a torrent.
     * and return the byte[] of it.
     */
    public byte[] getTorrentBitFieldByteByMetaInfoHash(String metainfohash) {
        MetaInfo metainfo = null;
        BitField bf = null;
        Set files = listTorrentFiles();
        TreeSet fileNames = new TreeSet(files); // sorts it alphabetically
        //ArrayList rv = new ArrayList(fileNames.size());
        for (Iterator iter = fileNames.iterator(); iter.hasNext(); ) {
            String name = (String)iter.next();
            Snark snark = getTorrent(name);
            if (snark != null){
                String mhash = Base64.encode(snark.meta.getInfoHash());
                if(mhash.equals(metainfohash)){
                    bf = snark.storage.getBitField();
                    //metainfo = snark.meta;
                    break;
                }
            }else {
                _log.error("snark for metainfohash = null" + metainfohash);
            }
        }
        
        // if(metainfo == null)return null;
        //BitField bf =  getSavedTorrentBitField( metainfo) ;
        if (bf == null) return null;
        return bf.getFieldBytes();
    }
    
     /**
     * XL
     * Get the storaged bitfield for a torrent.
     * and return the byte[] of it.
      * todo: is nearly same methode like getTorrentBitFieldByteByMetaInfoHash(..). make a util.class methode of them
     */
    public byte[] getTorrentSuperseedBitFieldByteByMetaInfoHash(String metainfohash) {
        MetaInfo metainfo = null;
        byte[] bfb = null;
        Set files = listTorrentFiles();
        TreeSet fileNames = new TreeSet(files); // sorts it alphabetically
        //ArrayList rv = new ArrayList(fileNames.size());
        for (Iterator iter = fileNames.iterator(); iter.hasNext(); ) {
            String name = (String)iter.next();
            Snark snark = getTorrent(name);
            if (snark != null){
                String mhash = Base64.encode(snark.meta.getInfoHash());
                if(mhash.equals(metainfohash)){
                    bfb = snark.storage.getSuperseedBitField();
                    //metainfo = snark.meta;
                    break;
                }
            }else {
                _log.error("snark for metainfohash = null" + metainfohash);
            }
        }
        
        if (bfb == null) return null;
        return bfb;
    }
    
    /**
     * XL
     * Get the storaged bitfield for a torrent.
     * and return the byte[] of it.
      * todo: is nearly same methode like getTorrentBitFieldByteByMetaInfoHash(..). make a util.class methode of them
     */
    public byte[] getTorrentSuperseedXORBitFieldByteByMetaInfoHash(String metainfohash) {
        MetaInfo metainfo = null;
        byte[] bfb = null;
        Set files = listTorrentFiles();
        TreeSet fileNames = new TreeSet(files); // sorts it alphabetically
        //ArrayList rv = new ArrayList(fileNames.size());
        for (Iterator iter = fileNames.iterator(); iter.hasNext(); ) {
            String name = (String)iter.next();
            Snark snark = getTorrent(name);
            if (snark != null){
                String mhash = Base64.encode(snark.meta.getInfoHash());
                if(mhash.equals(metainfohash)){
                    bfb = snark.storage.getXORSuperseedBitField();
                    //metainfo = snark.meta;
                    break;
                }
            }else {
                _log.error("snark for metainfohash = null" + metainfohash);
            }
        }
        
        if (bfb == null) return null;
        return bfb;
    }
    
    /**
     * Save the completion status of a torrent and the current time in the config file
     * in the form "i2psnark.zmeta.$base64infohash=$time,$base64bitfield".
     * The config file property key is appended with the Base64 of the infohash,
     * with the '=' changed to '$' since a key can't contain '='.
     * The time is a standard long converted to string.
     * The status is either a bitfield converted to Base64 or "." for a completed
     * torrent to save space in the config file and in memory.
     */
    public void saveTorrentStatus(MetaInfo metainfo, BitField bitfield) {
        byte[] ih = metainfo.getInfoHash();
        String infohash = Base64.encode(ih);
        infohash = infohash.replace('=', '$');
        String now = "" + System.currentTimeMillis();
        String bfs;
        if (bitfield.complete()) {
            bfs = ".";
        } else {
            byte[] bf = bitfield.getFieldBytes();
            bfs = Base64.encode(bf);
        }
        _config.setProperty(PROP_META_PREFIX + infohash + PROP_META_BITFIELD_SUFFIX, now + "," + bfs);
        saveConfig();
    }
    
    /**
     * Remove the status of a torrent from the config file.
     * This may help the config file from growing too big.
     */
    public void removeTorrentStatus(MetaInfo metainfo) {
        byte[] ih = metainfo.getInfoHash();
        String infohash = Base64.encode(ih);
        infohash = infohash.replace('=', '$');
        _config.remove(PROP_META_PREFIX + infohash + PROP_META_BITFIELD_SUFFIX);
        saveConfig();
    }
    
    private String locked_validateTorrent(MetaInfo info) throws IOException {
        String announce = info.getAnnounce();
        // basic validation of url
        if ((!announce.startsWith("http://")) ||
                (announce.indexOf(".i2p/") < 0))
            return "Non-i2p tracker in " + info.getName() + ", deleting it";
        List files = info.getFiles();
        if ( (files != null) && (files.size() > MAX_FILES_PER_TORRENT && MAX_FILES_PER_TORRENT > 0) ) {
            return "Too many files in " + info.getName() + " (" + files.size() + "), deleting it";
        } else if (info.getPieces() <= 0) {
            return "No pieces in " + info.getName() + "?  deleting it";
        } else if (info.getPieceLength(0) > 8*1024*1024) {
            return "Pieces are too large in " + info.getName() + " (" + info.getPieceLength(0)/1024 + "KB), deleting it";
        } else if (info.getTotalLength() > 100*1024*1024*1024l) {
            System.out.println("torrent info: " + info.toString());
            List lengths = info.getLengths();
            if (lengths != null)
                for (int i = 0; i < lengths.size(); i++)
                    System.out.println("File " + i + " is " + lengths.get(i) + " long");
            
            return "Torrents larger than 100GB are not supported yet (because we're paranoid): " + info.getName() + ", deleting it";
        } else {
            // ok
            return null;
        }
    }
    
    /**
     * Stop the torrent, leaving it on the list of torrents unless told to remove it
     */
    public Snark stopTorrent(String filename, boolean shouldRemove) {
        File sfile = new File(filename);
        try {
            filename = sfile.getCanonicalPath();
        } catch (IOException ioe) {
            _log.error("Unable to remove the torrent " + filename, ioe);
            addMessage("ERR: Could not remove the torrent '" + filename + "': " + ioe.getMessage());
            return null;
        }
        int remaining = 0;
        Snark torrent = null;
        synchronized (_snarks) {
            if (shouldRemove)
                torrent = (Snark)_snarks.remove(filename);
            else
                torrent = (Snark)_snarks.get(filename);
            remaining = _snarks.size();
        }
        if (torrent != null) {
            boolean wasStopped = torrent.stopped;
            torrent.stopTorrent();
            if (remaining == 0) {
                // should we disconnect/reconnect here (taking care to deal with the other thread's
                // I2PServerSocket.accept() call properly?)
                ////I2PSnarkUtil.instance().
            }
            if (!wasStopped)
                addMessage("Torrent stopped: '" + sfile.getName() + "'");
        }
        return torrent;
    }
    /**
     * Stop the torrent and delete the torrent file itself, but leaving the data
     * behind.
     */
    public void removeTorrent(String filename) {
        Snark torrent = stopTorrent(filename, true);
        if (torrent != null) {
            File torrentFile = new File(filename);
            torrentFile.delete();
            if (torrent.storage != null)
                removeTorrentStatus(torrent.storage.getMetaInfo());
            addMessage("Torrent removed: '" + torrentFile.getName() + "'");
        }
    }
    
    private class DirMonitor implements Runnable {
        public void run() {
            try {
                // do not run before the current config is set!
                while(!xlServletInit){
                    Thread.sleep(1*1000);
                }
                Thread.sleep(3*1000);// give a bit time to read and init the config (just in case getStartupDelayMinutes() == 0)
            } catch (InterruptedException ie) {}
            
            try { Thread.sleep(60*1000*getStartupDelayMinutes()); } catch (InterruptedException ie) {}
            // the first message was a "We are starting up in 1m"
            synchronized (_messages) {
                if (_messages.size() == 1)
                    _messages.remove(0);
            }
            
            while (true) {
                File dir = getDataDir();
                _log.debug("Directory Monitor loop over " + dir.getAbsolutePath());
                try {
                    monitorTorrents(dir);
                } catch (Exception e) {
                    _log.error("Error in the DirectoryMonitor", e);
                }
                try { Thread.sleep(60*1000); } catch (InterruptedException ie) {}
            }
        }
    }
    
    public void torrentComplete(Snark snark) {
        File f = new File(snark.torrent);
        long len = snark.meta.getTotalLength();
        addMessage("Download complete of " + f.getName()
        + (len < 5*1024*1024 ? " (size: " + (len/1024) + "KB)" : " (size: " + (len/(1024*1024l)) + "MB)"));
    }
    
    private void monitorTorrents(File dir) {
        String fileNames[] = dir.list(TorrentFilenameFilter.instance());
        List foundNames = new ArrayList(0);
        if (fileNames != null) {
            for (int i = 0; i < fileNames.length; i++) {
                try {
                    foundNames.add(new File(dir, fileNames[i]).getCanonicalPath());
                } catch (IOException ioe) {
                    _log.error("Error resolving '" + fileNames[i] + "' in '" + dir, ioe);
                }
            }
        }
        
        Set existingNames = listTorrentFiles();
        // lets find new ones first...
        for (int i = 0; i < foundNames.size(); i++) {
            if (existingNames.contains(foundNames.get(i))) {
                // already known.  noop
            } else {
                if (shouldAutoStart() && !I2PSnarkUtil.instance().connect())
                    addMessage("Unable to connect to I2P");
                addTorrent((String)foundNames.get(i), !shouldAutoStart());
            }
        }
        // now lets see which ones have been removed...
        for (Iterator iter = existingNames.iterator(); iter.hasNext(); ) {
            String name = (String)iter.next();
            if (foundNames.contains(name)) {
                // known and still there.  noop
            } else {
                // known, but removed.  drop it
                stopTorrent(name, true);
            }
        }
    }
        
    private static final String DEFAULT_TRACKERS[] = {
        "Postman", "http://YRgrgTLGnbTq2aZOZDJQ~o6Uk5k6TK-OZtx0St9pb0G-5EGYURZioxqYG8AQt~LgyyI~NCj6aYWpPO-150RcEvsfgXLR~CxkkZcVpgt6pns8SRc3Bi-QSAkXpJtloapRGcQfzTtwllokbdC-aMGpeDOjYLd8b5V9Im8wdCHYy7LRFxhEtGb~RL55DA8aYOgEXcTpr6RPPywbV~Qf3q5UK55el6Kex-6VCxreUnPEe4hmTAbqZNR7Fm0hpCiHKGoToRcygafpFqDw5frLXToYiqs9d4liyVB-BcOb0ihORbo0nS3CLmAwZGvdAP8BZ7cIYE3Z9IU9D1G8JCMxWarfKX1pix~6pIA-sp1gKlL1HhYhPMxwyxvuSqx34o3BqU7vdTYwWiLpGM~zU1~j9rHL7x60pVuYaXcFQDR4-QVy26b6Pt6BlAZoFmHhPcAuWfu-SFhjyZYsqzmEmHeYdAwa~HojSbofg0TMUgESRXMw6YThK1KXWeeJVeztGTz25sL8AAAA.i2p/announce.php=http://tracker.postman.i2p/"
                //       , "eBook", "http://E71FRom6PZNEqTN2Lr8P-sr23b7HJVC32KoGnVQjaX6zJiXwhJy2HsXob36Qmj81TYFZdewFZa9mSJ533UZgGyQkXo2ahctg82JKYZfDe5uDxAn1E9YPjxZCWJaFJh0S~UwSs~9AZ7UcauSJIoNtpxrtbmRNVFLqnkEDdLZi26TeucfOmiFmIWnVblLniWv3tG1boE9Abd-6j3FmYVrRucYuepAILYt6katmVNOk6sXmno1Eynrp~~MBuFq0Ko6~jsc2E2CRVYXDhGHEMdt-j6JUz5D7S2RIVzDRqQyAZLKJ7OdQDmI31przzmne1vOqqqLC~1xUumZVIvF~yOeJUGNjJ1Vx0J8i2BQIusn1pQJ6UCB~ZtZZLQtEb8EPVCfpeRi2ri1M5CyOuxN0V5ekmPHrYIBNevuTCRC26NP7ZS5VDgx1~NaC3A-CzJAE6f1QXi0wMI9aywNG5KGzOPifcsih8eyGyytvgLtrZtV7ykzYpPCS-rDfITncpn5hliPUAAAA.i2p/pub/bt/announce.php=http://de-ebook-archiv.i2p/pub/bt/"
                //       , "Gaytorrents", "http://uxPWHbK1OIj9HxquaXuhMiIvi21iK0~ZiG9d8G0840ZXIg0r6CbiV71xlsqmdnU6wm0T2LySriM0doW2gUigo-5BNkUquHwOjLROiETnB3ZR0Ml4IGa6QBPn1aAq2d9~g1r1nVjLE~pcFnXB~cNNS7kIhX1d6nLgYVZf0C2cZopEow2iWVUggGGnAA9mHjE86zLEnTvAyhbAMTqDQJhEuLa0ZYSORqzJDMkQt90MV4YMjX1ICY6RfUSFmxEqu0yWTrkHsTtRw48l~dz9wpIgc0a0T9C~eeWvmBFTqlJPtQZwntpNeH~jF7nlYzB58olgV2HHFYpVYD87DYNzTnmNWxCJ5AfDorm6AIUCV2qaE7tZtI1h6fbmGpGlPyW~Kw5GXrRfJwNvr6ajwAVi~bPVnrBwDZezHkfW4slOO8FACPR28EQvaTu9nwhAbqESxV2hCTq6vQSGjuxHeOuzBOEvRWkLKOHWTC09t2DbJ94FSqETmZopTB1ukEmaxRWbKSIaAAAA.i2p/announce.php=http://gaytorrents.i2p/"
                //       , "NickyB", "http://9On6d3cZ27JjwYCtyJJbowe054d5tFnfMjv4PHsYs-EQn4Y4mk2zRixatvuAyXz2MmRfXG-NAUfhKr0KCxRNZbvHmlckYfT-WBzwwpiMAl0wDFY~Pl8cqXuhfikSG5WrqdPfDNNIBuuznS0dqaczf~OyVaoEOpvuP3qV6wKqbSSLpjOwwAaQPHjlRtNIW8-EtUZp-I0LT45HSoowp~6b7zYmpIyoATvIP~sT0g0MTrczWhbVTUZnEkZeLhOR0Duw1-IRXI2KHPbA24wLO9LdpKKUXed05RTz0QklW5ROgR6TYv7aXFufX8kC0-DaKvQ5JKG~h8lcoHvm1RCzNqVE-2aiZnO2xH08H-iCWoLNJE-Td2kT-Tsc~3QdQcnEUcL5BF-VT~QYRld2--9r0gfGl-yDrJZrlrihHGr5J7ImahelNn9PpkVp6eIyABRmJHf2iicrk3CtjeG1j9OgTSwaNmEpUpn4aN7Kx0zNLdH7z6uTgCGD9Kmh1MFYrsoNlTp4AAAA.i2p/bittorrent/announce.php=http://nickyb.i2p/bittorrent/"
                //       , "Orion", "http://gKik1lMlRmuroXVGTZ~7v4Vez3L3ZSpddrGZBrxVriosCQf7iHu6CIk8t15BKsj~P0JJpxrofeuxtm7SCUAJEr0AIYSYw8XOmp35UfcRPQWyb1LsxUkMT4WqxAT3s1ClIICWlBu5An~q-Mm0VFlrYLIPBWlUFnfPR7jZ9uP5ZMSzTKSMYUWao3ejiykr~mtEmyls6g-ZbgKZawa9II4zjOy-hdxHgP-eXMDseFsrym4Gpxvy~3Fv9TuiSqhpgm~UeTo5YBfxn6~TahKtE~~sdCiSydqmKBhxAQ7uT9lda7xt96SS09OYMsIWxLeQUWhns-C~FjJPp1D~IuTrUpAFcVEGVL-BRMmdWbfOJEcWPZ~CBCQSO~VkuN1ebvIOr9JBerFMZSxZtFl8JwcrjCIBxeKPBmfh~xYh16BJm1BBBmN1fp2DKmZ2jBNkAmnUbjQOqWvUcehrykWk5lZbE7bjJMDFH48v3SXwRuDBiHZmSbsTY6zhGY~GkMQHNGxPMMSIAAAA.i2p/bt/announce.php=http://orion.i2p/bt/"
                //       , "anonymity", "http://8EoJZIKrWgGuDrxA3nRJs1jsPfiGwmFWL91hBrf0HA7oKhEvAna4Ocx47VLUR9retVEYBAyWFK-eZTPcvhnz9XffBEiJQQ~kFSCqb1fV6IfPiV3HySqi9U5Caf6~hC46fRd~vYnxmaBLICT3N160cxBETqH3v2rdxdJpvYt8q4nMk9LUeVXq7zqCTFLLG5ig1uKgNzBGe58iNcsvTEYlnbYcE930ABmrzj8G1qQSgSwJ6wx3tUQNl1z~4wSOUMan~raZQD60lRK70GISjoX0-D0Po9WmPveN3ES3g72TIET3zc3WPdK2~lgmKGIs8GgNLES1cXTolvbPhdZK1gxddRMbJl6Y6IPFyQ9o4-6Rt3Lp-RMRWZ2TG7j2OMcNSiOmATUhKEFBDfv-~SODDyopGBmfeLw16F4NnYednvn4qP10dyMHcUASU6Zag4mfc2-WivrOqeWhD16fVAh8MoDpIIT~0r9XmwdaVFyLcjbXObabJczxCAW3fodQUnvuSkwzAAAA.i2p/anonymityTracker/announce.php=http://anonymityweb.i2p/anonymityTracker/"
                //       , "The freak's tracker", "http://mHKva9x24E5Ygfey2llR1KyQHv5f8hhMpDMwJDg1U-hABpJ2NrQJd6azirdfaR0OKt4jDlmP2o4Qx0H598~AteyD~RJU~xcWYdcOE0dmJ2e9Y8-HY51ie0B1yD9FtIV72ZI-V3TzFDcs6nkdX9b81DwrAwwFzx0EfNvK1GLVWl59Ow85muoRTBA1q8SsZImxdyZ-TApTVlMYIQbdI4iQRwU9OmmtefrCe~ZOf4UBS9-KvNIqUL0XeBSqm0OU1jq-D10Ykg6KfqvuPnBYT1BYHFDQJXW5DdPKwcaQE4MtAdSGmj1epDoaEBUa9btQlFsM2l9Cyn1hzxqNWXELmx8dRlomQLlV4b586dRzW~fLlOPIGC13ntPXogvYvHVyEyptXkv890jC7DZNHyxZd5cyrKC36r9huKvhQAmNABT2Y~pOGwVrb~RpPwT0tBuPZ3lHYhBFYmD8y~AOhhNHKMLzea1rfwTvovBMByDdFps54gMN1mX4MbCGT4w70vIopS9yAAAA.i2p/bytemonsoon/announce.php"
                , "welterde", "http://BGKmlDOoH3RzFbPRfRpZV2FjpVj8~3moFftw5-dZfDf2070TOe8Tf2~DAVeaM6ZRLdmFEt~9wyFL8YMLMoLoiwGEH6IGW6rc45tstN68KsBDWZqkTohV1q9XFgK9JnCwE~Oi89xLBHsLMTHOabowWM6dkC8nI6QqJC2JODqLPIRfOVrDdkjLwtCrsckzLybNdFmgfoqF05UITDyczPsFVaHtpF1sRggOVmdvCM66otyonlzNcJbn59PA-R808vUrCPMGU~O9Wys0i-NoqtIbtWfOKnjCRFMNw5ex4n9m5Sxm9e20UkpKG6qzEuvKZWi8vTLe1NW~CBrj~vG7I3Ok4wybUFflBFOaBabxYJLlx4xTE1zJIVxlsekmAjckB4v-cQwulFeikR4LxPQ6mCQknW2HZ4JQIq6hL9AMabxjOlYnzh7kjOfRGkck8YgeozcyTvcDUcUsOuSTk06L4kdrv8h2Cozjbloi5zl6KTbj5ZTciKCxi73Pn9grICn-HQqEAAAA.i2p/a=http://tracker.welterde.i2p/stats?mode=top5"
                //       , "mastertracker", "http://VzXD~stRKbL3MOmeTn1iaCQ0CFyTmuFHiKYyo0Rd~dFPZFCYH-22rT8JD7i-C2xzYFa4jT5U2aqHzHI-Jre4HL3Ri5hFtZrLk2ax3ji7Qfb6qPnuYkuiF2E2UDmKUOppI8d9Ye7tjdhQVCy0izn55tBaB-U7UWdcvSK2i85sauyw3G0Gfads1Rvy5-CAe2paqyYATcDmGjpUNLoxbfv9KH1KmwRTNH6k1v4PyWYYnhbT39WfKMbBjSxVQRdi19cyJrULSWhjxaQfJHeWx5Z8Ev4bSPByBeQBFl2~4vqy0S5RypINsRSa3MZdbiAAyn5tr5slWR6QdoqY3qBQgBJFZppy-3iWkFqqKgSxCPundF8gdDLC5ddizl~KYcYKl42y9SGFHIukH-TZs8~em0~iahzsqWVRks3zRG~tlBcX2U3M2~OJs~C33-NKhyfZT7-XFBREvb8Szmd~p66jDxrwOnKaku-G6DyoQipJqIz4VHmY9-y5T8RrUcJcM-5lVoMpAAAA.i2p/announce.php=http://tracker.mastertracker.i2p/"
                //       , "Galen", "http://5jpwQMI5FT303YwKa5Rd38PYSX04pbIKgTaKQsWbqoWjIfoancFdWCShXHLI5G5ofOb0Xu11vl2VEMyPsg1jUFYSVnu4-VfMe3y4TKTR6DTpetWrnmEK6m2UXh91J5DZJAKlgmO7UdsFlBkQfR2rY853-DfbJtQIFl91tbsmjcA5CGQi4VxMFyIkBzv-pCsuLQiZqOwWasTlnzey8GcDAPG1LDcvfflGV~6F5no9mnuisZPteZKlrv~~TDoXTj74QjByWc4EOYlwqK8sbU9aOvz~s31XzErbPTfwiawiaZ0RUI-IDrKgyvmj0neuFTWgjRGVTH8bz7cBZIc3viy6ioD-eMQOrXaQL0TCWZUelRwHRvgdPiQrxdYQs7ixkajeHzxi-Pq0EMm5Vbh3j3Q9kfUFW3JjFDA-MLB4g6XnjCbM5J1rC0oOBDCIEfhQkszru5cyLjHiZ5yeA0VThgu~c7xKHybv~OMXION7V8pBKOgET7ZgAkw1xgYe3Kkyq5syAAAA.i2p/tr/announce.php=http://galen.i2p/tr/"
                , "crstrack", "http://b4G9sCdtfvccMAXh~SaZrPqVQNyGQbhbYMbw6supq2XGzbjU4NcOmjFI0vxQ8w1L05twmkOvg5QERcX6Mi8NQrWnR0stLExu2LucUXg1aYjnggxIR8TIOGygZVIMV3STKH4UQXD--wz0BUrqaLxPhrm2Eh9Hwc8TdB6Na4ShQUq5Xm8D4elzNUVdpM~RtChEyJWuQvoGAHY3ppX-EJJLkiSr1t77neS4Lc-KofMVmgI9a2tSSpNAagBiNI6Ak9L1T0F9uxeDfEG9bBSQPNMOSUbAoEcNxtt7xOW~cNOAyMyGydwPMnrQ5kIYPY8Pd3XudEko970vE0D6gO19yoBMJpKx6Dh50DGgybLQ9CpRaynh2zPULTHxm8rneOGRcQo8D3mE7FQ92m54~SvfjXjD2TwAVGI~ae~n9HDxt8uxOecAAvjjJ3TD4XM63Q9TmB38RmGNzNLDBQMEmJFpqQU8YeuhnS54IVdUoVQFqui5SfDeLXlSkh4vYoMU66pvBfWbAAAA.i2p/tracker/announce.php=http://crstrack.i2p/tracker/"
    };
    /** comma delimited list of name=announceURL=baseURL for the trackers to be displayed */
    public static final String PROP_TRACKERS = "i2psnark.trackers";
    private static Map trackerMap = null;
    /** sorted map of name to announceURL=baseURL */
    public Map getTrackers() {
        if (trackerMap != null) // only do this once, can't be updated while running
            return trackerMap;
        Map rv = new TreeMap();
        String trackers = _config.getProperty(PROP_TRACKERS);
        if ( (trackers == null) || (trackers.trim().length() <= 0) )
            trackers = _context.getProperty(PROP_TRACKERS);
        if ( (trackers == null) || (trackers.trim().length() <= 0) ) {
            for (int i = 0; i < DEFAULT_TRACKERS.length; i += 2)
                rv.put(DEFAULT_TRACKERS[i], DEFAULT_TRACKERS[i+1]);
        } else {
            StringTokenizer tok = new StringTokenizer(trackers, ",");
            while (tok.hasMoreTokens()) {
                String pair = tok.nextToken();
                int split = pair.indexOf('=');
                if (split <= 0)
                    continue;
                String name = pair.substring(0, split).trim();
                String url = pair.substring(split+1).trim();
                if ( (name.length() > 0) && (url.length() > 0) )
                    rv.put(name, url);
            }
        }
        
        trackerMap = rv;
        return trackerMap;
    }
    
    public String getOpenTrackerString() {
        return _config.getProperty(PROP_OPENTRACKERS, DEFAULT_OPENTRACKERS);
    }
    
    /** comma delimited list open trackers to use as backups */
    /** sorted map of name to announceURL=baseURL */
    public List getOpenTrackers() {
        if (!shouldUseOpenTrackers())
            return null;
        List rv = new ArrayList(1);
        String trackers = getOpenTrackerString();
        StringTokenizer tok = new StringTokenizer(trackers, ", ");
        while (tok.hasMoreTokens())
            rv.add(tok.nextToken());
        
        if (rv.size() <= 0)
            return null;
        return rv;
    }
    
    public void setXLServletInit(boolean value){
        if(!xlServletInit){
            //init it only once!
            xlServletInit = value;
            if(xlServletInit){
                _messages.add("Configuration file is '" + this._configFile + "'");
                int minutes = getStartupDelayMinutes();
                _messages.add("Adding torrents in " + minutes + (minutes == 1 ? " minute" : " minutes"));
            }
        }
    }
    
    public String getNickname(){
        return nickname;
    }
    
    public String getVersionXL(){
        return versionXL;
    }
    
    public void setNickname(String value){
        nickname = value;
        //_messages.add("Setting nickname " + nickname);
    }
    private static class TorrentFilenameFilter implements FilenameFilter {
        private static final TorrentFilenameFilter _filter = new TorrentFilenameFilter();
        public static TorrentFilenameFilter instance() { return _filter; }
        public boolean accept(File dir, String name) {
            return (name != null) && (name.endsWith(".torrent"));
        }
    }
    
    public class SnarkManagerShutdown extends I2PThread {
        public void run() {
            Set names = listTorrentFiles();
            for (Iterator iter = names.iterator(); iter.hasNext(); ) {
                Snark snark = getTorrent((String)iter.next());
                if ( (snark != null) && (!snark.stopped) )
                    snark.stopTorrent();
            }
        }
    }
}
