src/main/java/net/pterodactylus/reactor/states/TorrentState.java

   1 /*
   2  * Reactor - TorrentState.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.reactor.states;
  19
  20 import java.nio.charset.Charset;
  21 import java.util.Iterator;
  22 import java.util.List;
  23
  24 import net.pterodactylus.reactor.State;
  25 import net.pterodactylus.reactor.states.TorrentState.TorrentFile;
  26
  27 import org.apache.http.NameValuePair;
  28 import org.apache.http.client.utils.URLEncodedUtils;
  29
  30 import com.fasterxml.jackson.annotation.JsonProperty;
  31 import com.google.common.collect.Lists;
  32
  33 /**
  34  * {@link State} that contains information about an arbitrary number of torrent
  35  * files.
  36  *
  37  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  38  */
  39 public class TorrentState extends AbstractState implements Iterable<TorrentFile> {
  40
  41         /** The torrent files. */
  42         @JsonProperty
  43         private List<TorrentFile> files = Lists.newArrayList();
  44
  45         //
  46         // ACCESSORS
  47         //
  48
  49         /**
  50          * Adds a torrent file to this state.
  51          *
  52          * @param torrentFile
  53          *            The torrent file to add
  54          * @return This state
  55          */
  56         public TorrentState addTorrentFile(TorrentFile torrentFile) {
  57                 files.add(torrentFile);
  58                 return this;
  59         }
  60
  61         //
  62         // ITERABLE METHODS
  63         //
  64
  65         /**
  66          * {@inheritDoc}
  67          */
  68         @Override
  69         public Iterator<TorrentFile> iterator() {
  70                 return files.iterator();
  71         }
  72
  73         //
  74         // OBJECT METHODS
  75         //
  76
  77         /**
  78          * {@inheritDoc}
  79          */
  80         @Override
  81         public String toString() {
  82                 return String.format("%s[files=%s]", getClass().getSimpleName(), files);
  83         }
  84
  85         /**
  86          * Container for torrent file data.
  87          *
  88          * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  89          */
  90         public static class TorrentFile {
  91
  92                 /** The name of the file. */
  93                 @JsonProperty
  94                 private final String name;
  95
  96                 /** The size of the file. */
  97                 @JsonProperty
  98                 private final String size;
  99
 100                 /** The magnet URI of the file. */
 101                 @JsonProperty
 102                 private final String magnetUri;
 103
 104                 /** The download URI of the file. */
 105                 @JsonProperty
 106                 private final String downloadUri;
 107
 108                 /** The number of files in this torrent. */
 109                 @JsonProperty
 110                 private final int fileCount;
 111
 112                 /** The number of seeds connected to this torrent. */
 113                 @JsonProperty
 114                 private final int seedCount;
 115
 116                 /** The number of leechers connected to this torrent. */
 117                 @JsonProperty
 118                 private final int leechCount;
 119
 120                 /**
 121                  * No-arg constructor for deserialization.
 122                  */
 123                 @SuppressWarnings("unused")
 124                 private TorrentFile() {
 125                         this(null, null, null, null, 0, 0, 0);
 126                 }
 127
 128                 /**
 129                  * Creates a new torrent file.
 130                  *
 131                  * @param name
 132                  *            The name of the file
 133                  * @param size
 134                  *            The size of the file
 135                  * @param magnetUri
 136                  *            The magnet URI of the file
 137                  * @param downloadUri
 138                  *            The download URI of the file
 139                  * @param fileCount
 140                  *            The number of files
 141                  * @param seedCount
 142                  *            The number of connected seeds
 143                  * @param leechCount
 144                  *            The number of connected leechers
 145                  */
 146                 public TorrentFile(String name, String size, String magnetUri, String downloadUri, int fileCount, int seedCount, int leechCount) {
 147                         this.name = name;
 148                         this.size = size;
 149                         this.magnetUri = magnetUri;
 150                         this.downloadUri = downloadUri;
 151                         this.fileCount = fileCount;
 152                         this.seedCount = seedCount;
 153                         this.leechCount = leechCount;
 154                 }
 155
 156                 //
 157                 // ACCESSORS
 158                 //
 159
 160                 /**
 161                  * Returns the name of the file.
 162                  *
 163                  * @return The name of the file
 164                  */
 165                 public String name() {
 166                         return name;
 167                 }
 168
 169                 /**
 170                  * Returns the size of the file. The returned size may included
 171                  * non-numeric information, such as units (e. g. “860.46 MB”).
 172                  *
 173                  * @return The size of the file
 174                  */
 175                 public String size() {
 176                         return size;
 177                 }
 178
 179                 /**
 180                  * Returns the magnet URI of the file.
 181                  *
 182                  * @return The magnet URI of the file
 183                  */
 184                 public String magnetUri() {
 185                         return magnetUri;
 186                 }
 187
 188                 /**
 189                  * Returns the download URI of the file.
 190                  *
 191                  * @return The download URI of the file
 192                  */
 193                 public String downloadUri() {
 194                         return downloadUri;
 195                 }
 196
 197                 /**
 198                  * Returns the number of files in this torrent.
 199                  *
 200                  * @return The number of files in this torrent
 201                  */
 202                 public int fileCount() {
 203                         return fileCount;
 204                 }
 205
 206                 /**
 207                  * Returns the number of seeds connected to this torrent.
 208                  *
 209                  * @return The number of connected seeds
 210                  */
 211                 public int seedCount() {
 212                         return seedCount;
 213                 }
 214
 215                 /**
 216                  * Returns the number of leechers connected to this torrent.
 217                  *
 218                  * @return The number of connected leechers
 219                  */
 220                 public int leechCount() {
 221                         return leechCount;
 222                 }
 223
 224                 //
 225                 // PRIVATE METHODS
 226                 //
 227
 228                 /**
 229                  * Generates an ID for this file. If a {@link #magnetUri} is set, an ID
 230                  * is {@link #extractId(String) extracted} from it. Otherwise the magnet
 231                  * URI is used. If the {@link #magnetUri} is not set, the
 232                  * {@link #downloadUri} is used. If that is not set either, the name of
 233                  * the file is returned.
 234                  *
 235                  * @return The generated ID
 236                  */
 237                 private String generateId() {
 238                         if (magnetUri != null) {
 239                                 String id = extractId(magnetUri);
 240                                 if (id != null) {
 241                                         return id;
 242                                 }
 243                                 return magnetUri;
 244                         }
 245                         return (downloadUri != null) ? downloadUri : name;
 246                 }
 247
 248                 //
 249                 // STATIC METHODS
 250                 //
 251
 252                 /**
 253                  * Tries to extract the “exact target” of a magnet URI.
 254                  *
 255                  * @param magnetUri
 256                  *            The magnet URI to extract the “xt” from
 257                  * @return The extracted ID, or {@code null} if no ID could be found
 258                  */
 259                 private static String extractId(String magnetUri) {
 260                         List<NameValuePair> parameters = URLEncodedUtils.parse(magnetUri.substring("magnet:?".length()), Charset.forName("UTF-8"));
 261                         for (NameValuePair parameter : parameters) {
 262                                 if (parameter.getName().equals("xt")) {
 263                                         return parameter.getValue();
 264                                 }
 265                         }
 266                         return null;
 267                 }
 268
 269                 //
 270                 // OBJECT METHODS
 271                 //
 272
 273                 /**
 274                  * {@inheritDoc}
 275                  */
 276                 @Override
 277                 public int hashCode() {
 278                         return (generateId() != null) ? generateId().hashCode() : 0;
 279                 }
 280
 281                 /**
 282                  * {@inheritDoc}
 283                  */
 284                 @Override
 285                 public boolean equals(Object object) {
 286                         if (!(object instanceof TorrentFile)) {
 287                                 return false;
 288                         }
 289                         if (generateId() != null) {
 290                                 return generateId().equals(((TorrentFile) object).generateId());
 291                         }
 292                         return false;
 293                 }
 294
 295                 /**
 296                  * {@inheritDoc}
 297                  */
 298                 @Override
 299                 public String toString() {
 300                         return String.format("%s(%s,%s,%s)", name(), size(), magnetUri(), downloadUri());
 301                 }
 302
 303         }
 304
 305 }