src/main/java/net/pterodactylus/xdcc/core/Core.java

   1 /*
   2  * XdccDownloader - Core.java - Copyright © 2013 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.xdcc.core;
  19
  20 import java.io.File;
  21 import java.io.FileNotFoundException;
  22 import java.io.FileOutputStream;
  23 import java.io.IOException;
  24 import java.io.OutputStream;
  25 import java.util.Collection;
  26 import java.util.Collections;
  27 import java.util.List;
  28 import java.util.Map;
  29 import java.util.Map.Entry;
  30 import java.util.logging.Level;
  31 import java.util.logging.Logger;
  32
  33 import net.pterodactylus.irc.Connection;
  34 import net.pterodactylus.irc.ConnectionBuilder;
  35 import net.pterodactylus.irc.DccReceiver;
  36 import net.pterodactylus.irc.event.ChannelMessageReceived;
  37 import net.pterodactylus.irc.event.ConnectionEstablished;
  38 import net.pterodactylus.irc.event.DccSendReceived;
  39 import net.pterodactylus.irc.util.MessageCleaner;
  40 import net.pterodactylus.irc.util.RandomNickname;
  41 import net.pterodactylus.xdcc.core.event.BotAdded;
  42 import net.pterodactylus.xdcc.core.event.CoreStarted;
  43 import net.pterodactylus.xdcc.data.Bot;
  44 import net.pterodactylus.xdcc.data.Channel;
  45 import net.pterodactylus.xdcc.data.Network;
  46 import net.pterodactylus.xdcc.data.Pack;
  47 import net.pterodactylus.xdcc.data.Server;
  48
  49 import com.google.common.base.Optional;
  50 import com.google.common.collect.HashBasedTable;
  51 import com.google.common.collect.ImmutableSet;
  52 import com.google.common.collect.Lists;
  53 import com.google.common.collect.Maps;
  54 import com.google.common.collect.Sets;
  55 import com.google.common.collect.Table;
  56 import com.google.common.eventbus.EventBus;
  57 import com.google.common.eventbus.Subscribe;
  58 import com.google.common.util.concurrent.AbstractIdleService;
  59 import com.google.inject.Inject;
  60
  61 /**
  62  * The core of XDCC Downloader.
  63  *
  64  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  65  */
  66 public class Core extends AbstractIdleService {
  67
  68         /** The logger. */
  69         private static final Logger logger = Logger.getLogger(Core.class.getName());
  70
  71         /** The event bus. */
  72         private final EventBus eventBus;
  73
  74         /** The channels that should be monitored. */
  75         private final Collection<Channel> channels = Sets.newHashSet();
  76
  77         /** The channels that are currentlymonitored. */
  78         private final Collection<Channel> joinedChannels = Sets.newHashSet();
  79
  80         /** The current network connections. */
  81         private final Map<Network, Connection> networkConnections = Collections.synchronizedMap(Maps.<Network, Connection>newHashMap());
  82
  83         /** The currently known bots. */
  84         private final Table<Network, String, Bot> networkBots = HashBasedTable.create();
  85
  86         /** The current DCC receivers. */
  87         private final Collection<DccReceiver> dccReceivers = Sets.newHashSet();
  88
  89         /**
  90          * Creates a new core.
  91          *
  92          * @param eventBus
  93          *              The event bus
  94          */
  95         @Inject
  96         public Core(EventBus eventBus) {
  97                 this.eventBus = eventBus;
  98         }
  99
 100         //
 101         // ACCESSORS
 102         //
 103
 104         /**
 105          * Returns all configured channels. Due to various circumstances, configured
 106          * channels might not actually be joined.
 107          *
 108          * @return All configured channels
 109          */
 110         public Collection<Channel> channels() {
 111                 return ImmutableSet.copyOf(channels);
 112         }
 113
 114         /**
 115          * Returns all currently joined channels.
 116          *
 117          * @return All currently joined channels
 118          */
 119         public Collection<Channel> joinedChannels() {
 120                 return ImmutableSet.copyOf(joinedChannels);
 121         }
 122
 123         /**
 124          * Returns all currently known bots.
 125          *
 126          * @return All currently known bots
 127          */
 128         public Collection<Bot> bots() {
 129                 return networkBots.values();
 130         }
 131
 132         /**
 133          * Returns the currently active DCC receivers.
 134          *
 135          * @return The currently active DCC receivers
 136          */
 137         public Collection<DccReceiver> dccReceivers() {
 138                 return dccReceivers;
 139         }
 140
 141         //
 142         // ACTIONS
 143         //
 144
 145         /**
 146          * Adds a channel to monitor.
 147          *
 148          * @param channel
 149          *              The channel to monitor
 150          */
 151         public void addChannel(Channel channel) {
 152                 channels.add(channel);
 153         }
 154
 155         /**
 156          * Fetches the given pack from the given bot.
 157          *
 158          * @param bot
 159          *              The bot to fetch the pack from
 160          * @param pack
 161          *              The pack to fetch
 162          */
 163         public void fetch(Bot bot, Pack pack) {
 164                 Connection connection = networkConnections.get(bot.network());
 165                 if (connection == null) {
 166                         return;
 167                 }
 168
 169                 try {
 170                         connection.sendMessage(bot.name(), "XDCC SEND " + pack.id());
 171                 } catch (IOException ioe1) {
 172                         logger.log(Level.WARNING, "Could not send message to bot!", ioe1);
 173                 }
 174         }
 175
 176         //
 177         // ABSTRACTIDLESERVICE METHODS
 178         //
 179
 180         @Override
 181         protected void startUp() {
 182                 for (Channel channel : channels) {
 183                         logger.info(String.format("Connecting to Channel %s on Network %s…", channel.name(), channel.network().name()));
 184                         if (!networkConnections.containsKey(channel.network())) {
 185                                 /* select a random server. */
 186                                 List<Server> servers = Lists.newArrayList(channel.network().servers());
 187                                 Server server = servers.get((int) (Math.random() * servers.size()));
 188                                 Connection connection = new ConnectionBuilder(eventBus).connect(server.hostname()).port(server.unencryptedPorts().iterator().next()).build();
 189                                 connection.username(RandomNickname.get()).realName(RandomNickname.get());
 190                                 networkConnections.put(channel.network(), connection);
 191                                 connection.start();
 192                         }
 193                 }
 194
 195                 /* notify listeners. */
 196                 eventBus.post(new CoreStarted(this));
 197         }
 198
 199         @Override
 200         protected void shutDown() {
 201         }
 202
 203         //
 204         // EVENT HANDLERS
 205         //
 206
 207         /**
 208          * If a connection to a network has been established, the channels associated
 209          * with this network are joined.
 210          *
 211          * @param connectionEstablished
 212          *              The connection established event
 213          */
 214         @Subscribe
 215         public void connectionEstablished(ConnectionEstablished connectionEstablished) {
 216
 217                 /* get network for connection. */
 218                 Optional<Network> network = getNetwork(connectionEstablished.connection());
 219
 220                 /* found network? */
 221                 if (!network.isPresent()) {
 222                         return;
 223                 }
 224
 225                 /* join all channels on this network. */
 226                 for (Channel channel : channels) {
 227                         if (channel.network().equals(network.get())) {
 228                                 try {
 229                                         connectionEstablished.connection().joinChannel(channel.name());
 230                                 } catch (IOException ioe1) {
 231                                         logger.log(Level.WARNING, String.format("Could not join %s on %s!", channel.name(), network.get().name()), ioe1);
 232                                 }
 233                         }
 234                 }
 235         }
 236
 237         /**
 238          * If a message on a channel is received, it is parsed for pack information
 239          * with is then added to a bot.
 240          *
 241          * @param channelMessageReceived
 242          *              The channel message received event
 243          */
 244         @Subscribe
 245         public void channelMessageReceived(ChannelMessageReceived channelMessageReceived) {
 246                 String message = MessageCleaner.getDefaultInstance().clean(channelMessageReceived.message());
 247                 if (!message.startsWith("#")) {
 248                         /* most probably not a pack announcement. */
 249                         return;
 250                 }
 251
 252                 Optional<Network> network = getNetwork(channelMessageReceived.connection());
 253                 if (!network.isPresent()) {
 254                         /* message for unknown connection? */
 255                         return;
 256                 }
 257
 258                 /* parse pack information. */
 259                 Optional<Pack> pack = parsePack(message);
 260                 if (!pack.isPresent()) {
 261                         return;
 262                 }
 263
 264                 Bot bot;
 265                 synchronized (networkBots) {
 266                         if (!networkBots.contains(network.get(), channelMessageReceived.source().nick().get())) {
 267                                 bot = new Bot(network.get()).name(channelMessageReceived.source().nick().get());
 268                                 networkBots.put(network.get(), channelMessageReceived.source().nick().get(), bot);
 269                                 eventBus.post(new BotAdded(bot));
 270                         } else {
 271                                 bot = networkBots.get(network.get(), channelMessageReceived.source().nick().get());
 272                         }
 273                 }
 274
 275                 /* add pack. */
 276                 bot.addPack(pack.get());
 277                 logger.fine(String.format("Bot %s now has %d packs.", bot, bot.packs().size()));
 278         }
 279
 280         /**
 281          * Starts a DCC download.
 282          *
 283          * @param dccSendReceived
 284          *              The DCC SEND event
 285          */
 286         @Subscribe
 287         public void dccSendReceived(DccSendReceived dccSendReceived) {
 288                 logger.info(String.format("Starting download of %s.", dccSendReceived.filename()));
 289                 try {
 290                         OutputStream fileOutputStream = new FileOutputStream(new File("/home/bombe/Temp", dccSendReceived.filename()));
 291                         DccReceiver dccReceiver = new DccReceiver(dccSendReceived.inetAddress(), dccSendReceived.port(), dccSendReceived.filename(), dccSendReceived.filesize(), fileOutputStream);
 292                         dccReceivers.add(dccReceiver);
 293                         dccReceiver.start();
 294                 } catch (FileNotFoundException fnfe1) {
 295                         logger.log(Level.WARNING, "Could not open file for download!", fnfe1);
 296                 }
 297         }
 298
 299         //
 300         // PRIVATE METHODS
 301         //
 302
 303         /**
 304          * Searches all current connections for the given connection, returning the
 305          * associated network.
 306          *
 307          * @param connection
 308          *              The connection to get the network for
 309          * @return The network belonging to the connection, or {@link
 310          *         Optional#absent()}
 311          */
 312         private Optional<Network> getNetwork(Connection connection) {
 313                 for (Entry<Network, Connection> networkConnectionEntry : networkConnections.entrySet()) {
 314                         if (networkConnectionEntry.getValue().equals(connection)) {
 315                                 return Optional.of(networkConnectionEntry.getKey());
 316                         }
 317                 }
 318                 return Optional.absent();
 319         }
 320
 321         /**
 322          * Parses {@link Pack} information from the given message.
 323          *
 324          * @param message
 325          *              The message to parse pack information from
 326          * @return The parsed pack, or {@link Optional#absent()} if the message could
 327          *         not be parsed into a pack
 328          */
 329         private Optional<Pack> parsePack(String message) {
 330                 int squareOpen = message.indexOf('[');
 331                 int squareClose = message.indexOf(']', squareOpen);
 332                 if ((squareOpen == -1) && (squareClose == -1)) {
 333                         return Optional.absent();
 334                 }
 335                 String packSize = message.substring(squareOpen + 1, squareClose);
 336                 String packName = message.substring(message.lastIndexOf(' ') + 1);
 337                 String packIndex = message.substring(0, message.indexOf(' ')).substring(1);
 338                 return Optional.of(new Pack(packIndex, packSize, packName));
 339         }
 340
 341 }