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.IOException;
  21 import java.util.Collection;
  22 import java.util.Collections;
  23 import java.util.List;
  24 import java.util.Map;
  25 import java.util.Map.Entry;
  26 import java.util.logging.Level;
  27 import java.util.logging.Logger;
  28
  29 import net.pterodactylus.irc.Connection;
  30 import net.pterodactylus.irc.ConnectionBuilder;
  31 import net.pterodactylus.irc.event.ChannelMessageReceived;
  32 import net.pterodactylus.irc.event.ConnectionEstablished;
  33 import net.pterodactylus.irc.util.MessageCleaner;
  34 import net.pterodactylus.irc.util.RandomNickname;
  35 import net.pterodactylus.xdcc.core.event.BotAdded;
  36 import net.pterodactylus.xdcc.core.event.CoreStarted;
  37 import net.pterodactylus.xdcc.data.Bot;
  38 import net.pterodactylus.xdcc.data.Channel;
  39 import net.pterodactylus.xdcc.data.Network;
  40 import net.pterodactylus.xdcc.data.Pack;
  41 import net.pterodactylus.xdcc.data.Server;
  42
  43 import com.beust.jcommander.internal.Maps;
  44 import com.beust.jcommander.internal.Sets;
  45 import com.google.common.base.Optional;
  46 import com.google.common.collect.HashBasedTable;
  47 import com.google.common.collect.Lists;
  48 import com.google.common.collect.Table;
  49 import com.google.common.eventbus.EventBus;
  50 import com.google.common.eventbus.Subscribe;
  51 import com.google.common.util.concurrent.AbstractIdleService;
  52 import com.google.inject.Inject;
  53
  54 /**
  55  * The core of XDCC Downloader.
  56  *
  57  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  58  */
  59 public class Core extends AbstractIdleService {
  60
  61         /** The logger. */
  62         private static final Logger logger = Logger.getLogger(Core.class.getName());
  63
  64         /** The event bus. */
  65         private final EventBus eventBus;
  66
  67         /** The channels that should be monitored. */
  68         private final Collection<Channel> channels = Sets.newHashSet();
  69
  70         /** The current network connections. */
  71         private final Map<Network, Connection> networkConnections = Collections.synchronizedMap(Maps.<Network, Connection>newHashMap());
  72
  73         /** The currently known bots. */
  74         private final Table<Network, String, Bot> networkBots = HashBasedTable.create();
  75
  76         /**
  77          * Creates a new core.
  78          *
  79          * @param eventBus
  80          *              The event bus
  81          */
  82         @Inject
  83         public Core(EventBus eventBus) {
  84                 this.eventBus = eventBus;
  85         }
  86
  87         //
  88         // ACCESSORS
  89         //
  90
  91         /**
  92          * Returns all currently known bots.
  93          *
  94          * @return All currently known bots
  95          */
  96         public Collection<Bot> bots() {
  97                 return networkBots.values();
  98         }
  99
 100         //
 101         // ACTIONS
 102         //
 103
 104         /**
 105          * Adds a channel to monitor.
 106          *
 107          * @param channel
 108          *              The channel to monitor
 109          */
 110         public void addChannel(Channel channel) {
 111                 channels.add(channel);
 112         }
 113
 114         //
 115         // ABSTRACTIDLESERVICE METHODS
 116         //
 117
 118         @Override
 119         protected void startUp() {
 120                 for (Channel channel : channels) {
 121                         logger.info(String.format("Connecting to Channel %s on Network %s…", channel.name(), channel.network().name()));
 122                         if (!networkConnections.containsKey(channel.network())) {
 123                                 /* select a random server. */
 124                                 List<Server> servers = Lists.newArrayList(channel.network().servers());
 125                                 Server server = servers.get((int) (Math.random() * servers.size()));
 126                                 Connection connection = new ConnectionBuilder(eventBus).connect(server.hostname()).port(server.unencryptedPorts().iterator().next()).build();
 127                                 connection.username(RandomNickname.get()).realName(RandomNickname.get());
 128                                 networkConnections.put(channel.network(), connection);
 129                                 connection.start();
 130                         }
 131                 }
 132
 133                 /* notify listeners. */
 134                 eventBus.post(new CoreStarted(this));
 135         }
 136
 137         @Override
 138         protected void shutDown() {
 139         }
 140
 141         //
 142         // EVENT HANDLERS
 143         //
 144
 145         /**
 146          * If a connection to a network has been established, the channels associated
 147          * with this network are joined.
 148          *
 149          * @param connectionEstablished
 150          *              The connection established event
 151          */
 152         @Subscribe
 153         public void connectionEstablished(ConnectionEstablished connectionEstablished) {
 154
 155                 /* get network for connection. */
 156                 Optional<Network> network = getNetwork(connectionEstablished.connection());
 157
 158                 /* found network? */
 159                 if (!network.isPresent()) {
 160                         return;
 161                 }
 162
 163                 /* join all channels on this network. */
 164                 for (Channel channel : channels) {
 165                         if (channel.network().equals(network.get())) {
 166                                 try {
 167                                         connectionEstablished.connection().joinChannel(channel.name());
 168                                 } catch (IOException ioe1) {
 169                                         logger.log(Level.WARNING, String.format("Could not join %s on %s!", channel.name(), network.get().name()), ioe1);
 170                                 }
 171                         }
 172                 }
 173         }
 174
 175         /**
 176          * If a message on a channel is received, it is parsed for pack information
 177          * with is then added to a bot.
 178          *
 179          * @param channelMessageReceived
 180          *              The channel message received event
 181          */
 182         @Subscribe
 183         public void channelMessageReceived(ChannelMessageReceived channelMessageReceived) {
 184                 String message = MessageCleaner.getDefaultInstance().clean(channelMessageReceived.message());
 185                 if (!message.startsWith("#")) {
 186                         /* most probably not a pack announcement. */
 187                         return;
 188                 }
 189
 190                 Optional<Network> network = getNetwork(channelMessageReceived.connection());
 191                 if (!network.isPresent()) {
 192                         /* message for unknown connection? */
 193                         return;
 194                 }
 195
 196                 /* parse pack information. */
 197                 Optional<Pack> pack = parsePack(message);
 198                 if (!pack.isPresent()) {
 199                         return;
 200                 }
 201
 202                 Bot bot;
 203                 synchronized (networkBots) {
 204                         if (!networkBots.contains(network.get(), channelMessageReceived.source().nick().get())) {
 205                                 bot = new Bot(network.get()).name(channelMessageReceived.source().nick().get());
 206                                 networkBots.put(network.get(), channelMessageReceived.source().nick().get(), bot);
 207                                 eventBus.post(new BotAdded(bot));
 208                         } else {
 209                                 bot = networkBots.get(network.get(), channelMessageReceived.source().nick().get());
 210                         }
 211                 }
 212
 213                 /* add pack. */
 214                 bot.addPack(pack.get());
 215                 logger.fine(String.format("Bot %s now has %d packs.", bot, bot.packs().size()));
 216         }
 217
 218         //
 219         // PRIVATE METHODS
 220         //
 221
 222         /**
 223          * Searches all current connections for the given connection, returning the
 224          * associated network.
 225          *
 226          * @param connection
 227          *              The connection to get the network for
 228          * @return The network belonging to the connection, or {@link
 229          *         Optional#absent()}
 230          */
 231         private Optional<Network> getNetwork(Connection connection) {
 232                 for (Entry<Network, Connection> networkConnectionEntry : networkConnections.entrySet()) {
 233                         if (networkConnectionEntry.getValue().equals(connection)) {
 234                                 return Optional.of(networkConnectionEntry.getKey());
 235                         }
 236                 }
 237                 return Optional.absent();
 238         }
 239
 240         /**
 241          * Parses {@link Pack} information from the given message.
 242          *
 243          * @param message
 244          *              The message to parse pack information from
 245          * @return The parsed pack, or {@link Optional#absent()} if the message could
 246          *         not be parsed into a pack
 247          */
 248         private Optional<Pack> parsePack(String message) {
 249                 int squareOpen = message.indexOf('[');
 250                 int squareClose = message.indexOf(']', squareOpen);
 251                 if ((squareOpen == -1) && (squareClose == -1)) {
 252                         return Optional.absent();
 253                 }
 254                 String packSize = message.substring(squareOpen + 1, squareClose);
 255                 String packName = message.substring(message.lastIndexOf(' ') + 1);
 256                 String packIndex = message.substring(0, message.indexOf(' ')).substring(1);
 257                 return Optional.of(new Pack(packIndex, packSize, packName));
 258         }
 259
 260 }