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

   1 /*
   2  * Rhynodge - 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.rhynodge.triggers;
  19
  20 import static com.google.common.base.Preconditions.checkState;
  21
  22 import java.util.List;
  23 import java.util.Set;
  24
  25 import net.pterodactylus.rhynodge.Reaction;
  26 import net.pterodactylus.rhynodge.State;
  27 import net.pterodactylus.rhynodge.Trigger;
  28 import net.pterodactylus.rhynodge.output.DefaultOutput;
  29 import net.pterodactylus.rhynodge.output.Output;
  30 import net.pterodactylus.rhynodge.states.TorrentState;
  31 import net.pterodactylus.rhynodge.states.TorrentState.TorrentFile;
  32
  33 import org.apache.commons.lang3.StringEscapeUtils;
  34
  35 import com.google.common.collect.Lists;
  36 import com.google.common.collect.Sets;
  37
  38 /**
  39  * {@link Trigger} implementation that is triggered by {@link TorrentFile}s that
  40  * appear in the current {@link TorrentState} but not in the previous one.
  41  *
  42  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  43  */
  44 public class NewTorrentTrigger implements Trigger {
  45
  46         /** All known torrents. */
  47         private final Set<TorrentFile> allTorrentFiles = Sets.newHashSet();
  48
  49         /** The newly detected torrent files. */
  50         private final List<TorrentFile> newTorrentFiles = Lists.newArrayList();
  51
  52         //
  53         // TRIGGER METHODS
  54         //
  55
  56         /**
  57          * {@inheritDocs}
  58          */
  59         @Override
  60         public State mergeStates(State previousState, State currentState) {
  61                 checkState(currentState instanceof TorrentState, "currentState is not a TorrentState but a %s", currentState.getClass().getName());
  62                 checkState(previousState instanceof TorrentState, "previousState is not a TorrentState but a %s", currentState.getClass().getName());
  63                 TorrentState currentTorrentState = (TorrentState) currentState;
  64                 TorrentState previousTorrentState = (TorrentState) previousState;
  65
  66                 allTorrentFiles.clear();
  67                 newTorrentFiles.clear();
  68                 allTorrentFiles.addAll(previousTorrentState.torrentFiles());
  69                 for (TorrentFile torrentFile : currentTorrentState) {
  70                         if (allTorrentFiles.add(torrentFile)) {
  71                                 newTorrentFiles.add(torrentFile);
  72                         }
  73                 }
  74
  75                 return new TorrentState(allTorrentFiles);
  76         }
  77
  78         /**
  79          * {@inheritDoc}
  80          */
  81         @Override
  82         public boolean triggers() {
  83                 return !newTorrentFiles.isEmpty();
  84         }
  85
  86         /**
  87          * {@inheritDoc}
  88          */
  89         @Override
  90         public Output output(Reaction reaction) {
  91                 DefaultOutput output = new DefaultOutput(String.format("Found %d new Torrent(s) for “%s!”", newTorrentFiles.size(), reaction.name()));
  92                 output.addText("text/plain", getPlainTextList(reaction));
  93                 output.addText("text/html", getHtmlTextList(reaction));
  94                 return output;
  95         }
  96
  97         //
  98         // PRIVATE METHODS
  99         //
 100
 101         /**
 102          * Generates a plain text list of torrent files.
 103          *
 104          * @param reaction
 105          *            The reaction that was triggered
 106          * @return The generated plain text
 107          */
 108         private String getPlainTextList(Reaction reaction) {
 109                 StringBuilder plainText = new StringBuilder();
 110                 plainText.append("New Torrents:\n\n");
 111                 for (TorrentFile torrentFile : newTorrentFiles) {
 112                         plainText.append(torrentFile.name()).append('\n');
 113                         plainText.append('\t').append(torrentFile.size()).append(" in ").append(torrentFile.fileCount()).append(" file(s)\n");
 114                         plainText.append('\t').append(torrentFile.seedCount()).append(" seed(s), ").append(torrentFile.leechCount()).append(" leecher(s)\n");
 115                         if ((torrentFile.magnetUri() != null) && (torrentFile.magnetUri().length() > 0)) {
 116                                 plainText.append('\t').append(torrentFile.magnetUri()).append('\n');
 117                         }
 118                         if ((torrentFile.downloadUri() != null) && (torrentFile.downloadUri().length() > 0)) {
 119                                 plainText.append('\t').append(torrentFile.downloadUri()).append('\n');
 120                         }
 121                         plainText.append('\n');
 122                 }
 123                 return plainText.toString();
 124         }
 125
 126         /**
 127          * Generates an HTML list of the given torrent files.
 128          *
 129          * @param reaction
 130          *            The reaction that was triggered
 131          * @return The generated HTML
 132          */
 133         private String getHtmlTextList(Reaction reaction) {
 134                 StringBuilder htmlBuilder = new StringBuilder();
 135                 htmlBuilder.append("<html><body>\n");
 136                 htmlBuilder.append("<table>\n<caption>All Known Torrents</caption>\n");
 137                 htmlBuilder.append("<thead>\n");
 138                 htmlBuilder.append("<tr>");
 139                 htmlBuilder.append("<th>Filename</th>");
 140                 htmlBuilder.append("<th>Size</th>");
 141                 htmlBuilder.append("<th>File(s)</th>");
 142                 htmlBuilder.append("<th>Seeds</th>");
 143                 htmlBuilder.append("<th>Leechers</th>");
 144                 htmlBuilder.append("<th>Magnet</th>");
 145                 htmlBuilder.append("<th>Download</th>");
 146                 htmlBuilder.append("</tr>\n");
 147                 htmlBuilder.append("</thead>\n");
 148                 htmlBuilder.append("<tbody>\n");
 149                 for (TorrentFile torrentFile : allTorrentFiles) {
 150                         if (newTorrentFiles.contains(torrentFile)) {
 151                                 htmlBuilder.append("<tr style=\"color: #008000; font-weight: bold;\">");
 152                         } else {
 153                                 htmlBuilder.append("<tr>");
 154                         }
 155                         htmlBuilder.append("<td>").append(StringEscapeUtils.escapeHtml4(torrentFile.name())).append("</td>");
 156                         htmlBuilder.append("<td>").append(StringEscapeUtils.escapeHtml4(torrentFile.size())).append("</td>");
 157                         htmlBuilder.append("<td>").append(torrentFile.fileCount()).append("</td>");
 158                         htmlBuilder.append("<td>").append(torrentFile.seedCount()).append("</td>");
 159                         htmlBuilder.append("<td>").append(torrentFile.leechCount()).append("</td>");
 160                         htmlBuilder.append("<td><a href=\"").append(StringEscapeUtils.escapeHtml4(torrentFile.magnetUri())).append("\">Link</a></td>");
 161                         htmlBuilder.append("<td><a href=\"").append(StringEscapeUtils.escapeHtml4(torrentFile.downloadUri())).append("\">Link</a></td>");
 162                         htmlBuilder.append("</tr>\n");
 163                 }
 164                 htmlBuilder.append("</tbody>\n");
 165                 htmlBuilder.append("</table>\n");
 166                 htmlBuilder.append("</body></html>\n");
 167                 return htmlBuilder.toString();
 168         }
 169
 170 }