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