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