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.ChannelJoined;
  37 import net.pterodactylus.irc.event.ChannelMessageReceived;
  38 import net.pterodactylus.irc.event.ConnectionEstablished;
  39 import net.pterodactylus.irc.event.DccSendReceived;
  40 import net.pterodactylus.irc.util.MessageCleaner;
  41 import net.pterodactylus.irc.util.RandomNickname;
  42 import net.pterodactylus.xdcc.core.event.BotAdded;
  43 import net.pterodactylus.xdcc.core.event.CoreStarted;
  44 import net.pterodactylus.xdcc.data.Bot;
  45 import net.pterodactylus.xdcc.data.Channel;
  46 import net.pterodactylus.xdcc.data.Network;
  47 import net.pterodactylus.xdcc.data.Pack;
  48 import net.pterodactylus.xdcc.data.Server;
  49
  50 import com.google.common.base.Optional;
  51 import com.google.common.collect.HashBasedTable;
  52 import com.google.common.collect.ImmutableSet;
  53 import com.google.common.collect.Lists;
  54 import com.google.common.collect.Maps;
  55 import com.google.common.collect.Sets;
  56 import com.google.common.collect.Table;
  57 import com.google.common.eventbus.EventBus;
  58 import com.google.common.eventbus.Subscribe;
  59 import com.google.common.util.concurrent.AbstractIdleService;
  60 import com.google.inject.Inject;
  61
  62 /**
  63  * The core of XDCC Downloader.
  64  *
  65  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  66  */
  67 public class Core extends AbstractIdleService {
  68
  69         /** The logger. */
  70         private static final Logger logger = Logger.getLogger(Core.class.getName());
  71
  72         /** The event bus. */
  73         private final EventBus eventBus;
  74
  75         /** The channels that should be monitored. */
  76         private final Collection<Channel> channels = Sets.newHashSet();
  77
  78         /** The channels that are currentlymonitored. */
  79         private final Collection<Channel> joinedChannels = Sets.newHashSet();
  80
  81         /** The channels that are joined but not configured. */
  82         private final Collection<Channel> extraChannels = Sets.newHashSet();
  83
  84         /** The current network connections. */
  85         private final Map<Network, Connection> networkConnections = Collections.synchronizedMap(Maps.<Network, Connection>newHashMap());
  86
  87         /** The currently known bots. */
  88         private final Table<Network, String, Bot> networkBots = HashBasedTable.create();
  89
  90         /** The current DCC receivers. */
  91         private final Collection<DccReceiver> dccReceivers = Sets.newHashSet();
  92
  93         /**
  94          * Creates a new core.
  95          *
  96          * @param eventBus
  97          *              The event bus
  98          */
  99         @Inject
 100         public Core(EventBus eventBus) {
 101                 this.eventBus = eventBus;
 102         }
 103
 104         //
 105         // ACCESSORS
 106         //
 107
 108         /**
 109          * Returns all configured channels. Due to various circumstances, configured
 110          * channels might not actually be joined.
 111          *
 112          * @return All configured channels
 113          */
 114         public Collection<Channel> channels() {
 115                 return ImmutableSet.copyOf(channels);
 116         }
 117
 118         /**
 119          * Returns all currently joined channels.
 120          *
 121          * @return All currently joined channels
 122          */
 123         public Collection<Channel> joinedChannels() {
 124                 return ImmutableSet.copyOf(joinedChannels);
 125         }
 126
 127         /**
 128          * Returns all currently joined channels that are not configured.
 129          *
 130          * @return All currently joined but not configured channels
 131          */
 132         public Collection<Channel> extraChannels() {
 133                 return ImmutableSet.copyOf(extraChannels);
 134         }
 135
 136         /**
 137          * Returns all currently known bots.
 138          *
 139          * @return All currently known bots
 140          */
 141         public Collection<Bot> bots() {
 142                 return networkBots.values();
 143         }
 144
 145         /**
 146          * Returns the currently active DCC receivers.
 147          *
 148          * @return The currently active DCC receivers
 149          */
 150         public Collection<DccReceiver> dccReceivers() {
 151                 return dccReceivers;
 152         }
 153
 154         //
 155         // ACTIONS
 156         //
 157
 158         /**
 159          * Adds a channel to monitor.
 160          *
 161          * @param channel
 162          *              The channel to monitor
 163          */
 164         public void addChannel(Channel channel) {
 165                 channels.add(channel);
 166         }
 167
 168         /**
 169          * Fetches the given pack from the given bot.
 170          *
 171          * @param bot
 172          *              The bot to fetch the pack from
 173          * @param pack
 174          *              The pack to fetch
 175          */
 176         public void fetch(Bot bot, Pack pack) {
 177                 Connection connection = networkConnections.get(bot.network());
 178                 if (connection == null) {
 179                         return;
 180                 }
 181
 182                 try {
 183                         connection.sendMessage(bot.name(), "XDCC SEND " + pack.id());
 184                 } catch (IOException ioe1) {
 185                         logger.log(Level.WARNING, "Could not send message to bot!", ioe1);
 186                 }
 187         }
 188
 189         //
 190         // ABSTRACTIDLESERVICE METHODS
 191         //
 192
 193         @Override
 194         protected void startUp() {
 195                 for (Channel channel : channels) {
 196                         logger.info(String.format("Connecting to Channel %s on Network %s…", channel.name(), channel.network().name()));
 197                         if (!networkConnections.containsKey(channel.network())) {
 198                                 /* select a random server. */
 199                                 List<Server> servers = Lists.newArrayList(channel.network().servers());
 200                                 Server server = servers.get((int) (Math.random() * servers.size()));
 201                                 Connection connection = new ConnectionBuilder(eventBus).connect(server.hostname()).port(server.unencryptedPorts().iterator().next()).build();
 202                                 connection.username(RandomNickname.get()).realName(RandomNickname.get());
 203                                 networkConnections.put(channel.network(), connection);
 204                                 connection.start();
 205                         }
 206                 }
 207
 208                 /* notify listeners. */
 209                 eventBus.post(new CoreStarted(this));
 210         }
 211
 212         @Override
 213         protected void shutDown() {
 214         }
 215
 216         //
 217         // EVENT HANDLERS
 218         //
 219
 220         /**
 221          * If a connection to a network has been established, the channels associated
 222          * with this network are joined.
 223          *
 224          * @param connectionEstablished
 225          *              The connection established event
 226          */
 227         @Subscribe
 228         public void connectionEstablished(ConnectionEstablished connectionEstablished) {
 229
 230                 /* get network for connection. */
 231                 Optional<Network> network = getNetwork(connectionEstablished.connection());
 232
 233                 /* found network? */
 234                 if (!network.isPresent()) {
 235                         return;
 236                 }
 237
 238                 /* join all channels on this network. */
 239                 for (Channel channel : channels) {
 240                         if (channel.network().equals(network.get())) {
 241                                 try {
 242                                         connectionEstablished.connection().joinChannel(channel.name());
 243                                 } catch (IOException ioe1) {
 244                                         logger.log(Level.WARNING, String.format("Could not join %s on %s!", channel.name(), network.get().name()), ioe1);
 245                                 }
 246                         }
 247                 }
 248         }
 249
 250         /**
 251          * Shows a message when a channel was joined by us.
 252          *
 253          * @param channelJoined
 254          *              The channel joined event
 255          */
 256         @Subscribe
 257         public void channelJoined(ChannelJoined channelJoined) {
 258                 if (channelJoined.connection().isSource(channelJoined.client())) {
 259                         Optional<Network> network = getNetwork(channelJoined.connection());
 260                         if (!network.isPresent()) {
 261                                 return;
 262                         }
 263
 264                         Optional<Channel> channel = getChannel(network.get(), channelJoined.channel());
 265                         if (!channel.isPresent()) {
 266                                 /* it’s an extra channel. */
 267                                 extraChannels.add(new Channel(network.get(), channelJoined.channel()));
 268                                 logger.info(String.format("Joined extra Channel %s on %s.", channelJoined.channel(), network.get().name()));
 269                                 return;
 270                         }
 271
 272                         joinedChannels.add(channel.get());
 273                         logger.info(String.format("Joined Channel %s on %s.", channelJoined.channel(), network.get().name()));
 274                 }
 275         }
 276
 277         /**
 278          * If a message on a channel is received, it is parsed for pack information
 279          * with is then added to a bot.
 280          *
 281          * @param channelMessageReceived
 282          *              The channel message received event
 283          */
 284         @Subscribe
 285         public void channelMessageReceived(ChannelMessageReceived channelMessageReceived) {
 286                 String message = MessageCleaner.getDefaultInstance().clean(channelMessageReceived.message());
 287                 if (!message.startsWith("#")) {
 288                         /* most probably not a pack announcement. */
 289                         return;
 290                 }
 291
 292                 Optional<Network> network = getNetwork(channelMessageReceived.connection());
 293                 if (!network.isPresent()) {
 294                         /* message for unknown connection? */
 295                         return;
 296                 }
 297
 298                 /* parse pack information. */
 299                 Optional<Pack> pack = parsePack(message);
 300                 if (!pack.isPresent()) {
 301                         return;
 302                 }
 303
 304                 Bot bot;
 305                 synchronized (networkBots) {
 306                         if (!networkBots.contains(network.get(), channelMessageReceived.source().nick().get())) {
 307                                 bot = new Bot(network.get()).name(channelMessageReceived.source().nick().get());
 308                                 networkBots.put(network.get(), channelMessageReceived.source().nick().get(), bot);
 309                                 eventBus.post(new BotAdded(bot));
 310                         } else {
 311                                 bot = networkBots.get(network.get(), channelMessageReceived.source().nick().get());
 312                         }
 313                 }
 314
 315                 /* add pack. */
 316                 bot.addPack(pack.get());
 317                 logger.fine(String.format("Bot %s now has %d packs.", bot, bot.packs().size()));
 318         }
 319
 320         /**
 321          * Starts a DCC download.
 322          *
 323          * @param dccSendReceived
 324          *              The DCC SEND event
 325          */
 326         @Subscribe
 327         public void dccSendReceived(DccSendReceived dccSendReceived) {
 328                 logger.info(String.format("Starting download of %s.", dccSendReceived.filename()));
 329                 try {
 330                         OutputStream fileOutputStream = new FileOutputStream(new File("/home/bombe/Temp", dccSendReceived.filename()));
 331                         DccReceiver dccReceiver = new DccReceiver(eventBus, dccSendReceived.inetAddress(), dccSendReceived.port(), dccSendReceived.filename(), dccSendReceived.filesize(), fileOutputStream);
 332                         dccReceivers.add(dccReceiver);
 333                         dccReceiver.start();
 334                 } catch (FileNotFoundException fnfe1) {
 335                         logger.log(Level.WARNING, "Could not open file for download!", fnfe1);
 336                 }
 337         }
 338
 339         //
 340         // PRIVATE METHODS
 341         //
 342
 343         /**
 344          * Searches all current connections for the given connection, returning the
 345          * associated network.
 346          *
 347          * @param connection
 348          *              The connection to get the network for
 349          * @return The network belonging to the connection, or {@link
 350          *         Optional#absent()}
 351          */
 352         private Optional<Network> getNetwork(Connection connection) {
 353                 for (Entry<Network, Connection> networkConnectionEntry : networkConnections.entrySet()) {
 354                         if (networkConnectionEntry.getValue().equals(connection)) {
 355                                 return Optional.of(networkConnectionEntry.getKey());
 356                         }
 357                 }
 358                 return Optional.absent();
 359         }
 360
 361         /**
 362          * Returns the configured channel for the given network and name.
 363          *
 364          * @param network
 365          *              The network the channel is located on
 366          * @param channelName
 367          *              The name of the channel
 368          * @return The configured channel, or {@link Optional#absent()} if no
 369          *         configured channel matching the given network and name was found
 370          */
 371         public Optional<Channel> getChannel(Network network, String channelName) {
 372                 for (Channel channel : channels) {
 373                         if (channel.network().equals(network) && (channel.name().equals(channelName))) {
 374                                 return Optional.of(channel);
 375                         }
 376                 }
 377                 return Optional.absent();
 378         }
 379
 380         /**
 381          * Parses {@link Pack} information from the given message.
 382          *
 383          * @param message
 384          *              The message to parse pack information from
 385          * @return The parsed pack, or {@link Optional#absent()} if the message could
 386          *         not be parsed into a pack
 387          */
 388         private Optional<Pack> parsePack(String message) {
 389                 int squareOpen = message.indexOf('[');
 390                 int squareClose = message.indexOf(']', squareOpen);
 391                 if ((squareOpen == -1) && (squareClose == -1)) {
 392                         return Optional.absent();
 393                 }
 394                 String packSize = message.substring(squareOpen + 1, squareClose);
 395                 String packName = message.substring(message.lastIndexOf(' ') + 1);
 396                 String packIndex = message.substring(0, message.indexOf(' ')).substring(1);
 397                 return Optional.of(new Pack(packIndex, packSize, packName));
 398         }
 399
 400 }