src/main/java/net/pterodactylus/reactor/triggers/NewTorrentTrigger.java

   1 /*
   2  * Reactor - NewTorrentTrigger.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.triggers;
  19
  20 import static com.google.common.base.Preconditions.checkState;
  21
  22 import java.util.List;
  23
  24 import net.pterodactylus.reactor.State;
  25 import net.pterodactylus.reactor.Trigger;
  26 import net.pterodactylus.reactor.output.DefaultOutput;
  27 import net.pterodactylus.reactor.output.Output;
  28 import net.pterodactylus.reactor.states.TorrentState;
  29 import net.pterodactylus.reactor.states.TorrentState.TorrentFile;
  30
  31 import org.apache.commons.lang3.StringEscapeUtils;
  32
  33 import com.google.common.collect.Lists;
  34
  35 /**
  36  * {@link Trigger} implementation that is triggered by {@link TorrentFile}s that
  37  * appear in the current {@link TorrentState} but not in the previous one.
  38  *
  39  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  40  */
  41 public class NewTorrentTrigger implements Trigger {
  42
  43         /** The newly detected torrent files. */
  44         private List<TorrentFile> torrentFiles = Lists.newArrayList();
  45
  46         //
  47         // TRIGGER METHODS
  48         //
  49
  50         /**
  51          * {@inheritDoc}
  52          */
  53         @Override
  54         public boolean triggers(State currentState, State previousState) {
  55                 checkState(currentState instanceof TorrentState, "currentState is not a TorrentState but a %s", currentState.getClass().getName());
  56                 checkState(previousState instanceof TorrentState, "previousState is not a TorrentState but a %s", currentState.getClass().getName());
  57                 TorrentState currentTorrentState = (TorrentState) currentState;
  58                 TorrentState previousTorrentState = (TorrentState) previousState;
  59                 torrentFiles.clear();
  60                 for (TorrentFile torrentFile : currentTorrentState) {
  61                         torrentFiles.add(torrentFile);
  62                 }
  63                 for (TorrentFile torrentFile : previousTorrentState) {
  64                         torrentFiles.remove(torrentFile);
  65                 }
  66                 return !torrentFiles.isEmpty();
  67         }
  68
  69         /**
  70          * {@inheritDoc}
  71          */
  72         @Override
  73         public Output output() {
  74                 DefaultOutput output = new DefaultOutput(String.format("Found %d new Torrent(s)!", torrentFiles.size()));
  75                 output.addText("text/plain", getPlainTextList(torrentFiles));
  76                 output.addText("text/html", getHtmlTextList(torrentFiles));
  77                 return output;
  78         }
  79
  80         //
  81         // STATIC METHODS
  82         //
  83
  84         /**
  85          * Generates a plain text list of torrent files.
  86          *
  87          * @param torrentFiles
  88          *            The torrent files to list
  89          * @return The generated plain text
  90          */
  91         private static String getPlainTextList(List<TorrentFile> torrentFiles) {
  92                 StringBuilder plainText = new StringBuilder();
  93                 plainText.append("New Torrents:\n\n");
  94                 for (TorrentFile torrentFile : torrentFiles) {
  95                         plainText.append(torrentFile.name()).append('\n');
  96                         plainText.append('\t').append(torrentFile.size()).append(" in ").append(torrentFile.fileCount()).append(" file(s)\n");
  97                         plainText.append('\t').append(torrentFile.seedCount()).append(" seed(s), ").append(torrentFile.leechCount()).append(" leecher(s)\n");
  98                         plainText.append('\t').append(torrentFile.magnetUri()).append('\n');
  99                         plainText.append('\t').append(torrentFile.downloadUri()).append('\n');
 100                         plainText.append('\n');
 101                 }
 102                 return plainText.toString();
 103         }
 104
 105         /**
 106          * Generates an HTML list of the given torrent files.
 107          *
 108          * @param torrentFiles
 109          *            The torrent files to list
 110          * @return The generated HTML
 111          */
 112         private static String getHtmlTextList(List<TorrentFile> torrentFiles) {
 113                 StringBuilder htmlText = new StringBuilder();
 114                 htmlText.append("<html><body>\n");
 115                 htmlText.append("<h1>New Torrents</h1>\n");
 116                 htmlText.append("<ul>\n");
 117                 for (TorrentFile torrentFile : torrentFiles) {
 118                         htmlText.append("<li><strong>").append(StringEscapeUtils.escapeHtml4(torrentFile.name())).append("</strong></li>");
 119                         htmlText.append("<div>Size: <strong>").append(StringEscapeUtils.escapeHtml4(torrentFile.size())).append("</strong> in <strong>").append(torrentFile.fileCount()).append("</strong> file(s)</div>");
 120                         htmlText.append("<div><strong>").append(torrentFile.seedCount()).append("</strong> seed(s), <strong>").append(torrentFile.leechCount()).append("</strong> leecher(s)</div>");
 121                         htmlText.append(String.format("<div><a href=\"%s\">Magnet URI</a></div>", StringEscapeUtils.escapeHtml4(torrentFile.magnetUri())));
 122                         htmlText.append(String.format("<div><a href=\"%s\">Download URI</a></div>", StringEscapeUtils.escapeHtml4(torrentFile.downloadUri())));
 123                 }
 124                 htmlText.append("</ul>\n");
 125                 htmlText.append("</body></html>\n");
 126                 return htmlText.toString();
 127         }
 128
 129 }