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 static java.lang.String.format;
  21 import static net.pterodactylus.irc.event.ChannelNotJoined.Reason.banned;
  22 import static net.pterodactylus.irc.event.ChannelNotJoined.Reason.inviteOnly;
  23 import static net.pterodactylus.irc.event.ChannelNotJoined.Reason.registeredNicknamesOnly;
  24 import static net.pterodactylus.irc.util.MessageCleaner.getDefaultInstance;
  25 import static net.pterodactylus.xdcc.data.Download.FILTER_RUNNING;
  26
  27 import java.io.File;
  28 import java.io.FileNotFoundException;
  29 import java.io.FileOutputStream;
  30 import java.io.IOException;
  31 import java.io.OutputStream;
  32 import java.time.Duration;
  33 import java.time.Instant;
  34 import java.util.Collection;
  35 import java.util.Collections;
  36 import java.util.HashSet;
  37 import java.util.Iterator;
  38 import java.util.List;
  39 import java.util.Map;
  40 import java.util.Map.Entry;
  41 import java.util.Set;
  42 import java.util.TreeMap;
  43 import java.util.concurrent.TimeUnit;
  44 import java.util.function.Function;
  45 import java.util.stream.Collectors;
  46
  47 import net.pterodactylus.irc.Connection;
  48 import net.pterodactylus.irc.ConnectionFactory;
  49 import net.pterodactylus.irc.DccReceiver;
  50 import net.pterodactylus.irc.DefaultConnection;
  51 import net.pterodactylus.irc.event.ChannelJoined;
  52 import net.pterodactylus.irc.event.ChannelLeft;
  53 import net.pterodactylus.irc.event.ChannelMessageReceived;
  54 import net.pterodactylus.irc.event.ChannelNotJoined;
  55 import net.pterodactylus.irc.event.ClientQuit;
  56 import net.pterodactylus.irc.event.ConnectionClosed;
  57 import net.pterodactylus.irc.event.ConnectionEstablished;
  58 import net.pterodactylus.irc.event.ConnectionFailed;
  59 import net.pterodactylus.irc.event.DccAcceptReceived;
  60 import net.pterodactylus.irc.event.DccDownloadFailed;
  61 import net.pterodactylus.irc.event.DccDownloadFinished;
  62 import net.pterodactylus.irc.event.DccSendReceived;
  63 import net.pterodactylus.irc.event.KickedFromChannel;
  64 import net.pterodactylus.irc.event.NicknameChanged;
  65 import net.pterodactylus.irc.event.PrivateMessageReceived;
  66 import net.pterodactylus.irc.event.PrivateNoticeReceived;
  67 import net.pterodactylus.irc.event.ReplyReceived;
  68 import net.pterodactylus.irc.util.RandomNickname;
  69 import net.pterodactylus.xdcc.core.event.BotAdded;
  70 import net.pterodactylus.xdcc.core.event.CoreStarted;
  71 import net.pterodactylus.xdcc.core.event.DownloadFailed;
  72 import net.pterodactylus.xdcc.core.event.DownloadFinished;
  73 import net.pterodactylus.xdcc.core.event.DownloadStarted;
  74 import net.pterodactylus.xdcc.core.event.GenericError;
  75 import net.pterodactylus.xdcc.core.event.GenericMessage;
  76 import net.pterodactylus.xdcc.core.event.MessageReceived;
  77 import net.pterodactylus.xdcc.data.Bot;
  78 import net.pterodactylus.xdcc.data.Channel;
  79 import net.pterodactylus.xdcc.data.ConnectedNetwork;
  80 import net.pterodactylus.xdcc.data.Download;
  81 import net.pterodactylus.xdcc.data.Network;
  82 import net.pterodactylus.xdcc.data.Pack;
  83 import net.pterodactylus.xdcc.data.Server;
  84
  85 import com.google.common.base.Optional;
  86 import com.google.common.base.Predicate;
  87 import com.google.common.collect.FluentIterable;
  88 import com.google.common.collect.HashBasedTable;
  89 import com.google.common.collect.HashMultimap;
  90 import com.google.common.collect.ImmutableList;
  91 import com.google.common.collect.ImmutableSet;
  92 import com.google.common.collect.Lists;
  93 import com.google.common.collect.Maps;
  94 import com.google.common.collect.Multimap;
  95 import com.google.common.collect.Sets;
  96 import com.google.common.collect.Table;
  97 import com.google.common.eventbus.EventBus;
  98 import com.google.common.eventbus.Subscribe;
  99 import com.google.common.io.Closeables;
 100 import com.google.common.util.concurrent.AbstractExecutionThreadService;
 101 import com.google.inject.Inject;
 102 import org.apache.log4j.Logger;
 103
 104 /**
 105  * The core of XDCC Downloader.
 106  *
 107  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
 108  */
 109 public class Core extends AbstractExecutionThreadService {
 110
 111         /** The logger. */
 112         private static final Logger logger = Logger.getLogger(Core.class.getName());
 113
 114         private final Instant startup = Instant.now();
 115         private final Object syncObject = new Object();
 116         /** The event bus. */
 117         private final EventBus eventBus;
 118         private final ConnectionFactory connectionFactory;
 119         private final ChannelBanManager channelBanManager =
 120                         new ChannelBanManager();
 121         private final ConnectionBackoff connectionBackoff = new ConnectionBackoff();
 122
 123         /** The temporary directory to download files to. */
 124         private final String temporaryDirectory;
 125
 126         /** The directory to move finished downloads to. */
 127         private final String finalDirectory;
 128
 129         /** The channels that should be monitored. */
 130         private final Collection<Channel> channels = Sets.newHashSet();
 131
 132         /** The channels that are currentlymonitored. */
 133         private final Collection<Channel> joinedChannels = Sets.newHashSet();
 134         private final Set<Channel> channelsBeingJoined = new HashSet<>();
 135
 136         /** The channels that are joined but not configured. */
 137         private final Collection<Channel> extraChannels = Sets.newHashSet();
 138
 139         /** The current network connections. */
 140         private final Map<Network, Connection> networkConnections = Collections.synchronizedMap(Maps.<Network, Connection>newHashMap());
 141
 142         /** The currently known bots. */
 143         private final Table<Network, String, Bot> networkBots = HashBasedTable.create();
 144
 145         /** The current downloads. */
 146         private final Multimap<String, Download> downloads = HashMultimap.create();
 147
 148         /** The current DCC receivers. */
 149         private final Collection<DccReceiver> dccReceivers = Lists.newArrayList();
 150
 151         /**
 152          * Creates a new core.
 153          *
 154          * @param eventBus
 155          *              The event bus
 156          * @param temporaryDirectory
 157          *              The directory to download files to
 158          * @param finalDirectory
 159          *              The directory to move finished files to
 160          */
 161         @Inject
 162         public Core(EventBus eventBus, ConnectionFactory connectionFactory, String temporaryDirectory, String finalDirectory) {
 163                 this.eventBus = eventBus;
 164                 this.connectionFactory = connectionFactory;
 165                 this.temporaryDirectory = temporaryDirectory;
 166                 this.finalDirectory = finalDirectory;
 167         }
 168
 169         //
 170         // ACCESSORS
 171         //
 172
 173         /**
 174          * Returns all currently known connections.
 175          *
 176          * @return All currently known connections
 177          */
 178         public Collection<Connection> connections() {
 179                 return networkConnections.values();
 180         }
 181
 182         /**
 183          * Returns all defined networks.
 184          *
 185          * @return All defined networks
 186          */
 187         public Collection<Network> networks() {
 188                 return FluentIterable.from(channels).transform(Channel::network).toSet();
 189         }
 190
 191         /**
 192          * Returns all connected networks.
 193          *
 194          * @return All connected networks
 195          */
 196         public Collection<ConnectedNetwork> connectedNetworks() {
 197                 return networkConnections.entrySet().stream().map((entry) -> {
 198                         Network network = entry.getKey();
 199                         Collection<Bot> bots = networkBots.row(network).values();
 200                         int packCount = bots.stream().mapToInt((bot) -> bot.packs().size()).reduce((a, b) -> a + b).orElse(0);
 201                         Connection connection = entry.getValue();
 202                         return new ConnectedNetwork(network, connection.hostname(),
 203                                         connection.port(),
 204                                         connection.getUptime().orElse(Duration.ofSeconds(0)),
 205                                         connection.nickname(),
 206                                         channels.stream()
 207                                                         .filter((channel) -> channel.network()
 208                                                                         .equals(network))
 209                                                         .map(Channel::name)
 210                                                         .collect(Collectors.<String>toList()),
 211                                         extraChannels.stream()
 212                                                         .filter((channel) -> channel.network()
 213                                                                         .equals(network))
 214                                                         .map(Channel::name)
 215                                                         .collect(Collectors.<String>toList()),
 216                                         bots.size(), packCount);
 217                 }).collect(Collectors.<ConnectedNetwork>toList());
 218         }
 219
 220         /**
 221          * Returns all configured channels. Due to various circumstances, configured
 222          * channels might not actually be joined.
 223          *
 224          * @return All configured channels
 225          */
 226         public Collection<Channel> channels() {
 227                 return ImmutableSet.copyOf(channels);
 228         }
 229
 230         /**
 231          * Returns all currently joined channels.
 232          *
 233          * @return All currently joined channels
 234          */
 235         public Collection<Channel> joinedChannels() {
 236                 return ImmutableSet.copyOf(joinedChannels);
 237         }
 238
 239         /**
 240          * Returns all currently joined channels that are not configured.
 241          *
 242          * @return All currently joined but not configured channels
 243          */
 244         public Collection<Channel> extraChannels() {
 245                 return ImmutableSet.copyOf(extraChannels);
 246         }
 247
 248         /**
 249          * Returns all currently known bots.
 250          *
 251          * @return All currently known bots
 252          */
 253         public Collection<Bot> bots() {
 254                 return networkBots.values();
 255         }
 256
 257         /**
 258          * Returns all currently running downloads.
 259          *
 260          * @return All currently running downloads
 261          */
 262         public Collection<Download> downloads() {
 263                 return downloads.values();
 264         }
 265
 266         public Duration getUptime() {
 267                 return Duration.between(startup, Instant.now());
 268         }
 269
 270         //
 271         // ACTIONS
 272         //
 273
 274         /**
 275          * Adds a channel to monitor.
 276          *
 277          * @param channel
 278          *              The channel to monitor
 279          */
 280         public void addChannel(Channel channel) {
 281                 channels.add(channel);
 282         }
 283
 284         /**
 285          * Fetches the given pack from the given bot.
 286          *
 287          * @param bot
 288          *              The bot to fetch the pack from
 289          * @param pack
 290          *              The pack to fetch
 291          */
 292         public void fetch(Bot bot, Pack pack) {
 293                 Connection connection = networkConnections.get(bot.network());
 294                 if (connection == null) {
 295                         return;
 296                 }
 297
 298                 /* check if we are already downloading the file? */
 299                 if (downloads.containsKey(pack.name())) {
 300                         Collection<Download> packDownloads = downloads.get(pack.name());
 301                         Collection<Download> runningDownloads = FluentIterable.from(packDownloads).filter(FILTER_RUNNING).toSet();
 302                         if (!runningDownloads.isEmpty()) {
 303                                 Download download = runningDownloads.iterator().next();
 304                                 eventBus.post(new GenericMessage(String.format("File %s is already downloading from %s (%s).", pack.name(), download.bot().name(), download.bot().network().name())));
 305                                 return;
 306                         }
 307                         StringBuilder bots = new StringBuilder();
 308                         for (Download download : packDownloads) {
 309                                 if (bots.length() > 0) {
 310                                         bots.append(", ");
 311                                 }
 312                                 bots.append(download.bot().name()).append(" (").append(download.bot().network().name()).append(')');
 313                         }
 314                         eventBus.post(new GenericMessage(String.format("File %s is already requested from %d bots (%s).", pack.name(), packDownloads.size(), bots.toString())));
 315                 }
 316
 317                 Download download = new Download(bot, pack);
 318                 downloads.put(pack.name(), download);
 319
 320                 try {
 321                         connection.sendMessage(bot.name(), "XDCC SEND " + pack.id());
 322                 } catch (IOException ioe1) {
 323                         logger.warn("Could not send message to bot!", ioe1);
 324                 }
 325         }
 326
 327         /**
 328          * Cancels the download of the given pack from the given bot.
 329          *
 330          * @param bot
 331          *              The bot the pack is being downloaded from
 332          * @param pack
 333          *              The pack being downloaded
 334          */
 335         public void cancelDownload(Bot bot, Pack pack) {
 336                 Optional<Download> download = getDownload(pack, bot);
 337                 if (!download.isPresent()) {
 338                         return;
 339                 }
 340
 341                 /* stop the DCC receiver. */
 342                 if (download.get().dccReceiver() != null) {
 343                         download.get().dccReceiver().stop();
 344                 } else {
 345                         /* remove download if it hasn’t started yet. */
 346                         downloads.remove(pack.name(), download.get());
 347                 }
 348
 349                 /* get connection. */
 350                 Connection connection = networkConnections.get(bot.network());
 351                 if (connection == null) {
 352                         /* request for unknown network? */
 353                         return;
 354                 }
 355
 356                 /* remove the request from the bot, too. */
 357                 try {
 358                         connection.sendMessage(bot.name(), String.format("XDCC %s", (download.get().dccReceiver() != null) ? "CANCEL" : "REMOVE"));
 359                 } catch (IOException ioe1) {
 360                         logger.warn(String.format("Could not cancel DCC from %s (%s)!", bot.name(), bot.network().name()), ioe1);
 361                 }
 362         }
 363
 364         /**
 365          * Closes the given connection.
 366          *
 367          * @param connection
 368          *              The connection to close
 369          */
 370         public void closeConnection(Connection connection) {
 371                 try {
 372                         connection.close();
 373                 } catch (IOException ioe1) {
 374                         /* TODO */
 375                 }
 376         }
 377
 378         //
 379         // ABSTRACTIDLESERVICE METHODS
 380         //
 381
 382         @Override
 383         protected void startUp() {
 384                 for (Channel channel : channels) {
 385                         logger.info(String.format("Connecting to Channel %s on Network %s…", channel.name(), channel.network().name()));
 386                         connectNetwork(channel.network());
 387                 }
 388
 389                 /* notify listeners. */
 390                 eventBus.post(new CoreStarted(this));
 391         }
 392
 393         @Override
 394         protected void run() throws Exception {
 395                 while (isRunning()) {
 396
 397                         Set<Channel> missingChannels = new HashSet<>();
 398                         for (Channel channel : channels) {
 399                                 if (joinedChannels.contains(channel) || channelsBeingJoined.contains(channel)) {
 400                                         continue;
 401                                 }
 402                                 if (channelBanManager.isBanned(channel)) {
 403                                         continue;
 404                                 }
 405                                 if (!networkConnections.containsKey(channel.network()) || networkConnections.get(channel.network()).established()) {
 406                                         missingChannels.add(channel);
 407                                 }
 408                         }
 409                         Set<Network> missingNetworks = missingChannels.stream()
 410                                         .map(Channel::network)
 411                                         .distinct()
 412                                         .filter((network) -> !networkConnections.containsKey(network))
 413                                         .collect(Collectors.toSet());
 414
 415                         if (missingNetworks.isEmpty()) {
 416                                 if (!missingChannels.isEmpty()) {
 417                                         for (Channel missingChannel : missingChannels) {
 418                                                 Network network = missingChannel.network();
 419                                                 eventBus.post(new GenericMessage(String.format("Trying to join %s on %s...", missingChannel.name(), network)));
 420                                                 try {
 421                                                         channelsBeingJoined.add(missingChannel);
 422                                                         networkConnections.get(network).joinChannel(missingChannel.name());
 423                                                 } catch (IOException ioe1) {
 424                                                         logger.warn(String.format("Could not join %s on %s!", missingChannel.name(), network.name()), ioe1);
 425                                                 }
 426                                         }
 427                                 } else {
 428                                         synchronized (syncObject) {
 429                                                 try {
 430                                                         syncObject.wait(TimeUnit.MINUTES.toMillis(1));
 431                                                 } catch (InterruptedException ie1) {
 432                                                 /* ignore. */
 433                                                 }
 434                                         }
 435                                 }
 436                                 continue;
 437                         }
 438
 439                         Map<Long, Network> timesForNextConnects = new TreeMap<>(missingNetworks.stream()
 440                                         .collect(Collectors.toMap(connectionBackoff::getConnectionTime, Function.identity(), (network, ignore) -> network)));
 441
 442                         Optional<Entry<Long, Network>> firstNetwork = Optional.fromNullable(timesForNextConnects.entrySet().stream().findFirst().orElse(null));
 443                         if (!firstNetwork.isPresent()) {
 444                                 continue;
 445                         }
 446                         if (firstNetwork.get().getKey() > System.currentTimeMillis()) {
 447                                 eventBus.post(new GenericMessage(String.format("Will connect to %2$s at %1$tH:%1$tM...", firstNetwork.get().getKey(), firstNetwork.get().getValue().name())));
 448                                 synchronized (syncObject) {
 449                                         try {
 450                                                 syncObject.wait(firstNetwork.get().getKey() - System.currentTimeMillis());
 451                                         } catch (InterruptedException ie1) {
 452                                                 /* ignore. */
 453                                         }
 454                                 }
 455                                 if (!isRunning()) {
 456                                         break;
 457                                 }
 458                                 if (firstNetwork.get().getKey() > System.currentTimeMillis()) {
 459                                         continue;
 460                                 }
 461                         }
 462
 463                         connectNetwork(firstNetwork.get().getValue());
 464                 }
 465         }
 466
 467         @Override
 468         protected void triggerShutdown() {
 469                 synchronized (syncObject) {
 470                         syncObject.notifyAll();
 471                 }
 472         }
 473
 474         //
 475         // PRIVATE METHODS
 476         //
 477
 478         /**
 479          * Starts a new connection for the given network if no such connection exists
 480          * already.
 481          *
 482          * @param network
 483          *              The network to connect to
 484          */
 485         private void connectNetwork(Network network) {
 486                 if (!networkConnections.containsKey(network)) {
 487                                 /* select a random server. */
 488                         List<Server> servers = Lists.newArrayList(network.servers());
 489                         if (servers.isEmpty()) {
 490                                 eventBus.post(new GenericError(String.format("Network %s does not have any servers.", network.name())));
 491                                 return;
 492                         }
 493                         Server server = servers.get((int) (Math.random() * servers.size()));
 494                         eventBus.post(new GenericMessage(String.format("Connecting to %s on %s...", network.name(), server.hostname())));
 495                         Connection connection = connectionFactory.createConnection(server.hostname(),
 496                                         server.unencryptedPorts().iterator().next());
 497                         connection.username(RandomNickname.get()).realName(RandomNickname.get());
 498                         networkConnections.put(network, connection);
 499                         connection.open();
 500                 }
 501         }
 502
 503         /**
 504          * Removes the given connection and all its channels and bots.
 505          *
 506          * @param connection
 507          *              The connection to remove
 508          */
 509         private void removeConnection(Connection connection) {
 510                 logger.debug(String.format("Removing Connection %s...", connection));
 511                 Optional<Network> network = getNetwork(connection);
 512                 if (!network.isPresent()) {
 513                         logger.debug(String.format("Connection %s did not belong to any network.", connection));
 514                         return;
 515                 }
 516                 logger.debug(String.format("Connection %s belongs to network %s.", connection, network.get()));
 517                 networkConnections.remove(network.get());
 518
 519                 /* find all channels that need to be removed. */
 520                 for (Collection<Channel> channels : ImmutableList.of(joinedChannels, extraChannels)) {
 521                         for (Iterator<Channel> channelIterator = channels.iterator(); channelIterator.hasNext(); ) {
 522                                 Channel joinedChannel = channelIterator.next();
 523                                 if (!joinedChannel.network().equals(network.get())) {
 524                                         continue;
 525                                 }
 526                                 logger.debug(String.format("Channel %s will be removed.", joinedChannel));
 527                                 channelIterator.remove();
 528                         }
 529                 }
 530
 531                 /* now remove all bots for that network. */
 532                 Map<String, Bot> bots = networkBots.row(network.get());
 533                 int botCount = bots.size();
 534                 int packCount = 0;
 535                 for (Bot bot : bots.values()) {
 536                         packCount += bot.packs().size();
 537                 }
 538                 bots.clear();
 539                 eventBus.post(new GenericMessage(String.format("Network %s disconnected, %d bots removed, %d packs removed.", network.get().name(), botCount, packCount)));
 540         }
 541
 542         //
 543         // EVENT HANDLERS
 544         //
 545
 546         /**
 547          * If a connection to a network has been established, the channels associated
 548          * with this network are joined.
 549          *
 550          * @param connectionEstablished
 551          *              The connection established event
 552          */
 553         @Subscribe
 554         public void connectionEstablished(ConnectionEstablished connectionEstablished) {
 555
 556                 /* get network for connection. */
 557                 Optional<Network> network = getNetwork(connectionEstablished.connection());
 558
 559                 /* found network? */
 560                 if (!network.isPresent()) {
 561                         eventBus.post(new GenericMessage(String.format("Connected to unknown network: %s", connectionEstablished.connection().hostname())));
 562                         return;
 563                 }
 564
 565                 connectionBackoff.connectionSuccessful(network.get());
 566                 eventBus.post(new GenericMessage(String.format("Connected to network %s.", network.get().name())));
 567
 568                 /* join all channels on this network. */
 569                 for (Channel channel : channels) {
 570                         if (channel.network().equals(network.get())) {
 571                                 try {
 572                                         eventBus.post(new GenericMessage(String.format("Trying to join %s on %s...", channel.name(), network.get().name())));
 573                                         connectionEstablished.connection().joinChannel(channel.name());
 574                                 } catch (IOException ioe1) {
 575                                         logger.warn(String.format("Could not join %s on %s!", channel.name(), network.get().name()), ioe1);
 576                                 }
 577                         }
 578                 }
 579         }
 580
 581         /**
 582          * Remove all data stored for a network if the connection is closed.
 583          *
 584          * @param connectionClosed
 585          *              The connection closed event
 586          */
 587         @Subscribe
 588         public void connectionClosed(ConnectionClosed connectionClosed) {
 589                 connectionBackoff.connectionFailed(getNetwork(connectionClosed.connection()).get());
 590                 removeConnection(connectionClosed.connection());
 591                 synchronized (syncObject) {
 592                         syncObject.notifyAll();
 593                 }
 594                 eventBus.post(new GenericMessage(String.format("Connection closed by %s.", connectionClosed.connection().hostname())));
 595         }
 596
 597         /**
 598          * Remove all data stored for a network if the connection fails.
 599          *
 600          * @param connectionFailed
 601          *              The connection failed event
 602          */
 603         @Subscribe
 604         public void connectionFailed(ConnectionFailed connectionFailed) {
 605                 connectionBackoff.connectionFailed(getNetwork(connectionFailed.connection()).get());
 606                 removeConnection(connectionFailed.connection());
 607                 synchronized (syncObject) {
 608                         syncObject.notifyAll();
 609                 }
 610                 eventBus.post(new GenericMessage(String.format("Could not connect to %s: %s.", connectionFailed.connection().hostname(), connectionFailed.cause())));
 611         }
 612
 613         /**
 614          * Shows a message when a channel was joined by us.
 615          *
 616          * @param channelJoined
 617          *              The channel joined event
 618          */
 619         @Subscribe
 620         public void channelJoined(ChannelJoined channelJoined) {
 621                 if (channelJoined.connection().isSource(channelJoined.client())) {
 622                         Optional<Network> network = getNetwork(channelJoined.connection());
 623                         if (!network.isPresent()) {
 624                                 return;
 625                         }
 626
 627                         Optional<Channel> channel = getChannel(network.get(), channelJoined.channel());
 628                         if (!channel.isPresent()) {
 629                                 /* it’s an extra channel. */
 630                                 extraChannels.add(new Channel(network.get(), channelJoined.channel()));
 631                                 logger.info(String.format("Joined extra Channel %s on %s.", channelJoined.channel(), network.get().name()));
 632                                 return;
 633                         }
 634
 635                         channelBanManager.unban(channel.get());
 636                         joinedChannels.add(channel.get());
 637                         channelsBeingJoined.remove(channel.get());
 638                         logger.info(String.format("Joined Channel %s on %s.", channelJoined.channel(), network.get().name()));
 639                 }
 640         }
 641
 642         @Subscribe
 643         public void channelNotJoined(ChannelNotJoined channelNotJoined) {
 644                 Optional<Network> network = getNetwork(channelNotJoined.connection());
 645                 if (!network.isPresent()) {
 646                         return;
 647                 }
 648
 649                 Optional<Channel> channel = getChannel(network.get(), channelNotJoined.channel());
 650                 synchronized (syncObject) {
 651                         syncObject.notifyAll();
 652                 }
 653                 if (!channel.isPresent()) {
 654                         eventBus.post(new GenericMessage(format("Could not join %s but didn’t try to join, either.", channelNotJoined.channel())));
 655                         return;
 656                 }
 657                 channelsBeingJoined.remove(channel.get());
 658
 659
 660                 /* remove all bots for this channel, we might have been kicked. */
 661                 Collection<Bot> botsToRemove = networkBots.row(network.get())
 662                                 .values().stream()
 663                                 .filter(bot -> bot.channel()
 664                                                 .equalsIgnoreCase(channel.get().name()))
 665                                 .collect(Collectors.toSet());
 666                 botsToRemove.stream()
 667                                 .forEach(bot -> networkBots.row(network.get())
 668                                                 .remove(bot.name()));
 669
 670                 channelBanManager.ban(channel.get());
 671                 if (channelNotJoined.reason() == registeredNicknamesOnly) {
 672                         eventBus.post(new GenericMessage(
 673                                         format("%s requires nickname registration, suspending join for a day.",
 674                                                         channel.get())));
 675                 } else if (channelNotJoined.reason() == inviteOnly) {
 676                         eventBus.post(new GenericMessage(
 677                                         format("%s is invite-only, suspending join for a day.",
 678                                                         channel.get())));
 679                 } else if (channelNotJoined.reason() == banned) {
 680                         eventBus.post(new GenericMessage(
 681                                         format("Banned from %s, suspending join for a day.",
 682                                                         channel.get())));
 683                 } else {
 684                         eventBus.post(new GenericMessage(
 685                                         format("Could not join %s: %s", channelNotJoined.channel(),
 686                                                         channelNotJoined.reason())));
 687                 }
 688         }
 689
 690         /**
 691          * Removes bots that leave a channel, or channels when it’s us that’s leaving.
 692          *
 693          * @param channelLeft
 694          *              The channel left event
 695          */
 696         @Subscribe
 697         public void channelLeft(ChannelLeft channelLeft) {
 698                 Optional<Network> network = getNetwork(channelLeft.connection());
 699                 if (!network.isPresent()) {
 700                         return;
 701                 }
 702
 703                 Bot bot = networkBots.get(network.get(), channelLeft.client().nick().get());
 704                 if (bot == null) {
 705                         /* maybe it was us? */
 706                         if (channelLeft.connection().isSource(channelLeft.client())) {
 707                                 Optional<Channel> channel = getChannel(network.get(), channelLeft.channel());
 708                                 if (!channel.isPresent()) {
 709                                         /* maybe it was an extra channel? */
 710                                         channel = getExtraChannel(network.get(), channelLeft.channel());
 711                                         if (!channel.isPresent()) {
 712                                                 /* okay, whatever. */
 713                                                 return;
 714                                         }
 715
 716                                         extraChannels.remove(channel);
 717                                 } else {
 718                                         channels.remove(channel.get());
 719                                 }
 720                                 synchronized (syncObject) {
 721                                         syncObject.notifyAll();
 722                                 }
 723
 724                                 eventBus.post(new GenericMessage(String.format("Left Channel %s on %s.", channel.get().name(), channel.get().network().name())));
 725                         }
 726
 727                         return;
 728                 }
 729
 730                 networkBots.remove(network.get(), channelLeft.client().nick().get());
 731         }
 732
 733         @Subscribe
 734         public void kickedFromChannel(KickedFromChannel kickedFromChannel) {
 735                 Optional<Network> network = getNetwork(kickedFromChannel.connection());
 736                 if (!network.isPresent()) {
 737                         return;
 738                 }
 739
 740                 /* have we been kicked? */
 741                 if (nicknameMatchesConnection(kickedFromChannel.connection(), kickedFromChannel.kickee())) {
 742                         Optional<Channel> channel = getChannel(network.get(), kickedFromChannel.channel());
 743                         if (!channel.isPresent()) {
 744                                 /* maybe it was an extra channel? */
 745                                 channel = getExtraChannel(network.get(), kickedFromChannel.channel());
 746                                 if (!channel.isPresent()) {
 747                                         /* okay, whatever. */
 748                                         return;
 749                                 }
 750
 751                                 extraChannels.remove(channel.get());
 752                         } else {
 753                                 joinedChannels.remove(channel.get());
 754                         }
 755                         synchronized (syncObject) {
 756                                 syncObject.notifyAll();
 757                         }
 758                         eventBus.post(new GenericMessage(format(
 759                                         "Kicked from %s by %s: %s",
 760                                         kickedFromChannel.channel(),
 761                                         kickedFromChannel.kicker(),
 762                                         kickedFromChannel.reason().orElse("<unknown>")
 763                         )));
 764                 }
 765         }
 766
 767         private boolean nicknameMatchesConnection(Connection connection, String nickname) {
 768                 return connection.nickname().equalsIgnoreCase(nickname);
 769         }
 770
 771         /**
 772          * Removes a client (which may be a bot) from the table of known bots.
 773          *
 774          * @param clientQuit
 775          *              The client quit event
 776          */
 777         @Subscribe
 778         public void clientQuit(ClientQuit clientQuit) {
 779                 Optional<Network> network = getNetwork(clientQuit.connection());
 780                 if (!network.isPresent()) {
 781                         return;
 782                 }
 783
 784                 networkBots.remove(network.get(), clientQuit.client().nick().get());
 785         }
 786
 787         /**
 788          * If the nickname of a bit changes, remove it from the old name and store it
 789          * under the new name.
 790          *
 791          * @param nicknameChanged
 792          *              The nickname changed event
 793          */
 794         @Subscribe
 795         public void nicknameChanged(NicknameChanged nicknameChanged) {
 796                 Optional<Network> network = getNetwork(nicknameChanged.connection());
 797                 if (!network.isPresent()) {
 798                         return;
 799                 }
 800
 801                 Bot bot = networkBots.remove(network.get(), nicknameChanged.client().nick().get());
 802                 if (bot == null) {
 803                         return;
 804                 }
 805
 806                 networkBots.put(network.get(), nicknameChanged.newNickname(), bot);
 807         }
 808
 809         /**
 810          * If a message on a channel is received, it is parsed for pack information
 811          * with is then added to a bot.
 812          *
 813          * @param channelMessageReceived
 814          *              The channel message received event
 815          */
 816         @Subscribe
 817         public void channelMessageReceived(ChannelMessageReceived channelMessageReceived) {
 818                 String message = getDefaultInstance().clean(channelMessageReceived.message());
 819                 if (!message.startsWith("#")) {
 820                         /* most probably not a pack announcement. */
 821                         return;
 822                 }
 823
 824                 Optional<Network> network = getNetwork(channelMessageReceived.connection());
 825                 if (!network.isPresent()) {
 826                         /* message for unknown connection? */
 827                         return;
 828                 }
 829
 830                 /* parse pack information. */
 831                 Optional<Pack> pack = parsePack(message);
 832                 if (!pack.isPresent()) {
 833                         return;
 834                 }
 835
 836                 Bot bot;
 837                 synchronized (networkBots) {
 838                         if (!networkBots.contains(network.get(), channelMessageReceived.source().nick().get())) {
 839                                 bot = new Bot(network.get(), channelMessageReceived.channel(),
 840                                                 channelMessageReceived.source().nick().get());
 841                                 networkBots.put(network.get(), channelMessageReceived.source().nick().get(), bot);
 842                                 eventBus.post(new BotAdded(bot));
 843                         } else {
 844                                 bot = networkBots.get(network.get(), channelMessageReceived.source().nick().get());
 845                         }
 846                 }
 847
 848                 /* add pack. */
 849                 bot.addPack(pack.get());
 850                 logger.debug(String.format("Bot %s now has %d packs.", bot, bot.packs().size()));
 851         }
 852
 853         /**
 854          * Forward all private messages to every console.
 855          *
 856          * @param privateMessageReceived
 857          *              The private message recevied event
 858          */
 859         @Subscribe
 860         public void privateMessageReceived(PrivateMessageReceived privateMessageReceived) {
 861                 eventBus.post(new MessageReceived(privateMessageReceived.source(), privateMessageReceived.message()));
 862         }
 863
 864         /**
 865          * Sends a message to all console when a notice was received.
 866          *
 867          * @param privateNoticeReceived
 868          *              The notice received event
 869          */
 870         @Subscribe
 871         public void privateNoticeReceived(PrivateNoticeReceived privateNoticeReceived) {
 872                 Optional<Network> network = getNetwork(privateNoticeReceived.connection());
 873                 if (!network.isPresent()) {
 874                         return;
 875                 }
 876
 877                 eventBus.post(new GenericMessage(String.format("Notice from %s (%s): %s", privateNoticeReceived.source(), network.get(), privateNoticeReceived.text())));
 878         }
 879
 880         /**
 881          * Starts a DCC download.
 882          *
 883          * @param dccSendReceived
 884          *              The DCC SEND event
 885          */
 886         @Subscribe
 887         public void dccSendReceived(final DccSendReceived dccSendReceived) {
 888                 final Optional<Network> network = getNetwork(dccSendReceived.connection());
 889                 if (!network.isPresent()) {
 890                         return;
 891                 }
 892
 893                 Collection<Download> packDownloads = downloads.get(dccSendReceived.filename());
 894                 if (packDownloads.isEmpty()) {
 895                         /* unknown download, ignore. */
 896                         return;
 897                 }
 898
 899                 /* check if it’s already downloading. */
 900                 Collection<Download> runningDownloads = FluentIterable.from(packDownloads).filter(FILTER_RUNNING).toSet();
 901                 if (!runningDownloads.isEmpty()) {
 902                         eventBus.post(new GenericMessage(String.format("Ignoring offer for %s, it’s already being downloaded.", dccSendReceived.filename())));
 903                         return;
 904                 }
 905
 906                 /* locate the correct download. */
 907                 Collection<Download> requestedDownload = FluentIterable.from(packDownloads).filter(new Predicate<Download>() {
 908
 909                         @Override
 910                         public boolean apply(Download download) {
 911                                 return download.bot().network().equals(network.get()) && download.bot().name().equalsIgnoreCase(dccSendReceived.source().nick().get());
 912                         }
 913                 }).toSet();
 914
 915                 /* we did not request this download. */
 916                 if (requestedDownload.isEmpty()) {
 917                         return;
 918                 }
 919
 920                 Download download = requestedDownload.iterator().next();
 921
 922                 /* check if the file already exists. */
 923                 File outputFile = new File(temporaryDirectory, dccSendReceived.filename());
 924                 if (outputFile.exists()) {
 925                         long existingFileSize = outputFile.length();
 926
 927                         /* file already complete? */
 928                         if ((dccSendReceived.filesize() > -1) && (existingFileSize >= dccSendReceived.filesize())) {
 929                                 /* file is apparently already complete. just move it. */
 930                                 if (outputFile.renameTo(new File(finalDirectory, download.pack().name()))) {
 931                                         eventBus.post(new GenericMessage(String.format("File %s already downloaded.", download.pack().name())));
 932                                 } else {
 933                                         eventBus.post(new GenericMessage(String.format("File %s already downloaded but not moved to %s.", download.pack().name(), finalDirectory)));
 934                                 }
 935
 936                                 /* remove download. */
 937                                 downloads.removeAll(download.pack().name());
 938                                 return;
 939                         }
 940
 941                         /* file not complete yet, DCC resume it. */
 942                         try {
 943                                 download.remoteAddress(dccSendReceived.inetAddress()).filesize(dccSendReceived.filesize());
 944                                 dccSendReceived.connection().sendDccResume(dccSendReceived.source().nick().get(), dccSendReceived.filename(), dccSendReceived.port(), existingFileSize);
 945                         } catch (IOException ioe1) {
 946                                 eventBus.post(new GenericError(String.format("Could not send DCC RESUME %s to %s (%s).", dccSendReceived.filename(), dccSendReceived.source().nick().get(), ioe1.getMessage())));
 947                         }
 948
 949                         return;
 950                 }
 951
 952                 /* file does not exist, start the download. */
 953                 try {
 954                         OutputStream fileOutputStream = new FileOutputStream(outputFile);
 955                         DccReceiver dccReceiver = new DccReceiver(eventBus, dccSendReceived.inetAddress(), dccSendReceived.port(), dccSendReceived.filename(), dccSendReceived.filesize(), fileOutputStream);
 956                         download.filename(outputFile.getPath()).outputStream(fileOutputStream).dccReceiver(dccReceiver);
 957                         dccReceivers.add(dccReceiver);
 958                         dccReceiver.start();
 959                         eventBus.post(new DownloadStarted(download));
 960                 } catch (FileNotFoundException fnfe1) {
 961                         eventBus.post(new GenericError(String.format("Could not start download of %s from %s (%s).", dccSendReceived.filename(), dccSendReceived.source().nick().get(), fnfe1.getMessage())));
 962                 }
 963         }
 964
 965         @Subscribe
 966         public void dccAcceptReceived(final DccAcceptReceived dccAcceptReceived) {
 967                 final Optional<Network> network = getNetwork(dccAcceptReceived.connection());
 968                 if (!network.isPresent()) {
 969                         return;
 970                 }
 971
 972                 Collection<Download> packDownloads = downloads.get(dccAcceptReceived.filename());
 973                 if (packDownloads.isEmpty()) {
 974                         /* unknown download, ignore. */
 975                         return;
 976                 }
 977
 978                 /* check if it’s already downloading. */
 979                 Collection<Download> runningDownloads = FluentIterable.from(packDownloads).filter(FILTER_RUNNING).toSet();
 980                 if (!runningDownloads.isEmpty()) {
 981                         eventBus.post(new GenericMessage(String.format("Ignoring offer for %s, it’s already being downloaded.", dccAcceptReceived.filename())));
 982                         return;
 983                 }
 984
 985                 /* locate the correct download. */
 986                 Collection<Download> requestedDownload = FluentIterable.from(packDownloads).filter(new Predicate<Download>() {
 987
 988                         @Override
 989                         public boolean apply(Download download) {
 990                                 return download.bot().network().equals(network.get()) && download.bot().name().equalsIgnoreCase(dccAcceptReceived.source().nick().get());
 991                         }
 992                 }).toSet();
 993
 994                 /* we did not request this download. */
 995                 if (requestedDownload.isEmpty()) {
 996                         return;
 997                 }
 998
 999                 Download download = requestedDownload.iterator().next();
1000
1001                 try {
1002                         File outputFile = new File(temporaryDirectory, dccAcceptReceived.filename());
1003                         if (outputFile.length() != dccAcceptReceived.position()) {
1004                                 eventBus.post(new GenericError(String.format("Download %s from %s does not start at the right position!")));
1005                                 logger.warn(String.format("Download %s from %s: have %d bytes but wants to resume from %d!", dccAcceptReceived.filename(), dccAcceptReceived.source(), outputFile.length(), dccAcceptReceived.position()));
1006
1007                                 downloads.removeAll(download.pack().name());
1008                                 return;
1009                         }
1010                         OutputStream outputStream = new FileOutputStream(outputFile, true);
1011                         DccReceiver dccReceiver = new DccReceiver(eventBus, download.remoteAddress(), dccAcceptReceived.port(), dccAcceptReceived.filename(), dccAcceptReceived.position(), download.filesize(), outputStream);
1012                         download.filename(outputFile.getPath()).outputStream(outputStream).dccReceiver(dccReceiver);
1013                         dccReceivers.add(dccReceiver);
1014                         dccReceiver.start();
1015                         eventBus.post(new DownloadStarted(download));
1016                 } catch (FileNotFoundException fnfe1) {
1017                 }
1018         }
1019
1020         /**
1021          * Closes the output stream of the download and moves the file to the final
1022          * location.
1023          *
1024          * @param dccDownloadFinished
1025          *              The DCC download finished event
1026          */
1027         @Subscribe
1028         public void dccDownloadFinished(DccDownloadFinished dccDownloadFinished) {
1029
1030                 /* locate the correct download. */
1031                 Collection<Download> requestedDownload = FluentIterable.from(downloads.get(dccDownloadFinished.dccReceiver().filename())).filter(FILTER_RUNNING).toSet();
1032                 if (requestedDownload.isEmpty()) {
1033                         /* this seems wrong. */
1034                         logger.warn("Download finished but could not be located.");
1035                         return;
1036                 }
1037                 Download download = requestedDownload.iterator().next();
1038
1039                 try {
1040                         download.outputStream().close();
1041                         File file = new File(download.filename());
1042                         file.renameTo(new File(finalDirectory, download.pack().name()));
1043                         eventBus.post(new DownloadFinished(download));
1044                         dccReceivers.remove(dccDownloadFinished.dccReceiver());
1045                         downloads.removeAll(download.pack().name());
1046                 } catch (IOException ioe1) {
1047                         /* TODO - handle all the errors. */
1048                         logger.warn(String.format("Could not move file %s to directory %s.", download.filename(), finalDirectory), ioe1);
1049                 }
1050         }
1051
1052         /**
1053          * Closes the output stream and notifies all listeners of the failure.
1054          *
1055          * @param dccDownloadFailed
1056          *              The DCC download failed event
1057          */
1058         @Subscribe
1059         public void dccDownloadFailed(DccDownloadFailed dccDownloadFailed) {
1060
1061                 /* locate the correct download. */
1062                 Collection<Download> requestedDownload = FluentIterable.from(downloads.get(dccDownloadFailed.dccReceiver().filename())).filter(FILTER_RUNNING).toSet();
1063                 if (requestedDownload.isEmpty()) {
1064                         /* this seems wrong. */
1065                         logger.warn("Download finished but could not be located.");
1066                         return;
1067                 }
1068                 Download download = requestedDownload.iterator().next();
1069
1070                 try {
1071                         Closeables.close(download.outputStream(), true);
1072                         eventBus.post(new DownloadFailed(download));
1073                         dccReceivers.remove(dccDownloadFailed.dccReceiver());
1074                         downloads.removeAll(download.pack().name());
1075                 } catch (IOException ioe1) {
1076                         /* swallow silently. */
1077                 }
1078         }
1079
1080         @Subscribe
1081         public void replyReceived(ReplyReceived replyReceived) {
1082                 logger.trace(String.format("%s: %s", replyReceived.connection().hostname(), replyReceived.reply()));
1083         }
1084
1085         //
1086         // PRIVATE METHODS
1087         //
1088
1089         /**
1090          * Returns the download of the given pack from the given bot.
1091          *
1092          * @param pack
1093          *              The pack being downloaded
1094          * @param bot
1095          *              The bot the pack is being downloaded from
1096          * @return The download, or {@link Optional#absent()} if the download could not
1097          *         be found
1098          */
1099         private Optional<Download> getDownload(Pack pack, Bot bot) {
1100                 if (!downloads.containsKey(pack.name())) {
1101                         return Optional.absent();
1102                 }
1103                 for (Download download : Lists.newArrayList(downloads.get(pack.name()))) {
1104                         if (download.bot().equals(bot)) {
1105                                 return Optional.of(download);
1106                         }
1107                 }
1108                 return Optional.absent();
1109         }
1110
1111         /**
1112          * Searches all current connections for the given connection, returning the
1113          * associated network.
1114          *
1115          * @param connection
1116          *              The connection to get the network for
1117          * @return The network belonging to the connection, or {@link
1118          *         Optional#absent()}
1119          */
1120         private Optional<Network> getNetwork(Connection connection) {
1121                 for (Entry<Network, Connection> networkConnectionEntry : networkConnections.entrySet()) {
1122                         if (networkConnectionEntry.getValue().equals(connection)) {
1123                                 return Optional.of(networkConnectionEntry.getKey());
1124                         }
1125                 }
1126                 return Optional.absent();
1127         }
1128
1129         /**
1130          * Returns the configured channel for the given network and name.
1131          *
1132          * @param network
1133          *              The network the channel is located on
1134          * @param channelName
1135          *              The name of the channel
1136          * @return The configured channel, or {@link Optional#absent()} if no
1137          *         configured channel matching the given network and name was found
1138          */
1139         public Optional<Channel> getChannel(Network network, String channelName) {
1140                 for (Channel channel : channels) {
1141                         if (channel.network().equals(network) && (channel.name().equalsIgnoreCase(channelName))) {
1142                                 return Optional.of(channel);
1143                         }
1144                 }
1145                 return Optional.absent();
1146         }
1147
1148         /**
1149          * Returns the extra channel for the given network and name.
1150          *
1151          * @param network
1152          *              The network the channel is located on
1153          * @param channelName
1154          *              The name of the channel
1155          * @return The extra channel, or {@link Optional#absent()} if no extra channel
1156          *         matching the given network and name was found
1157          */
1158         public Optional<Channel> getExtraChannel(Network network, String channelName) {
1159                 for (Channel channel : extraChannels) {
1160                         if (channel.network().equals(network) && (channel.name().equalsIgnoreCase(channelName))) {
1161                                 return Optional.of(channel);
1162                         }
1163                 }
1164                 return Optional.absent();
1165         }
1166
1167         /**
1168          * Parses {@link Pack} information from the given message.
1169          *
1170          * @param message
1171          *              The message to parse pack information from
1172          * @return The parsed pack, or {@link Optional#absent()} if the message could
1173          *         not be parsed into a pack
1174          */
1175         private Optional<Pack> parsePack(String message) {
1176                 int squareOpen = message.indexOf('[');
1177                 int squareClose = message.indexOf(']', squareOpen);
1178                 if ((squareOpen == -1) && (squareClose == -1)) {
1179                         return Optional.absent();
1180                 }
1181                 String packSize = message.substring(squareOpen + 1, squareClose);
1182                 String packName = message.substring(message.lastIndexOf(' ') + 1);
1183                 String packIndex = message.substring(0, message.indexOf(' ')).substring(1);
1184                 return Optional.of(new Pack(packIndex, packSize, packName));
1185         }
1186
1187 }