+/*
+ * Rhynodge - NewEpisodeTrigger.java - Copyright © 2013 David Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.rhynodge.triggers;
+
+import static com.google.common.base.Preconditions.checkState;
+
+import java.util.Collection;
+
+import net.pterodactylus.rhynodge.Reaction;
+import net.pterodactylus.rhynodge.State;
+import net.pterodactylus.rhynodge.Trigger;
+import net.pterodactylus.rhynodge.output.DefaultOutput;
+import net.pterodactylus.rhynodge.output.Output;
+import net.pterodactylus.rhynodge.states.EpisodeState;
+import net.pterodactylus.rhynodge.states.EpisodeState.Episode;
+import net.pterodactylus.rhynodge.states.TorrentState.TorrentFile;
+
+import org.apache.commons.lang3.StringEscapeUtils;
+
+import com.google.common.base.Predicate;
+import com.google.common.collect.Collections2;
+
+/**
+ * {@link Trigger} implementation that compares two {@link EpisodeState}s for
+ * new and changed {@link Episode}s.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class NewEpisodeTrigger implements Trigger {
+
+ /** All new episodes. */
+ private Collection<Episode> newEpisodes;
+
+ /** All changed episodes. */
+ private Collection<Episode> changedEpisodes;
+
+ //
+ // TRIGGER METHODS
+ //
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public boolean triggers(State currentState, State previousState) {
+ checkState(currentState instanceof EpisodeState, "currentState is not a EpisodeState but a %s", currentState.getClass().getName());
+ checkState(previousState instanceof EpisodeState, "previousState is not a EpisodeState but a %s", currentState.getClass().getName());
+ final EpisodeState currentEpisodeState = (EpisodeState) currentState;
+ final EpisodeState previousEpisodeState = (EpisodeState) previousState;
+
+ newEpisodes = Collections2.filter(currentEpisodeState.episodes(), new Predicate<Episode>() {
+
+ @Override
+ public boolean apply(Episode episode) {
+ return !previousEpisodeState.episodes().contains(episode);
+ }
+ });
+
+ changedEpisodes = Collections2.filter(currentEpisodeState.episodes(), new Predicate<Episode>() {
+
+ @Override
+ public boolean apply(Episode episode) {
+ if (!previousEpisodeState.episodes().contains(episode)) {
+ return false;
+ }
+
+ /* find previous episode. */
+ final Episode previousEpisode = findPreviousEpisode(episode);
+
+ /* compare the list of torrent files. */
+ Collection<TorrentFile> newTorrentFiles = Collections2.filter(episode.torrentFiles(), new Predicate<TorrentFile>() {
+
+ @Override
+ public boolean apply(TorrentFile torrentFile) {
+ return !previousEpisode.torrentFiles().contains(torrentFile);
+ }
+ });
+
+ return !newTorrentFiles.isEmpty();
+ }
+
+ private Episode findPreviousEpisode(Episode episode) {
+ for (Episode previousStateEpisode : previousEpisodeState) {
+ if (previousStateEpisode.equals(episode)) {
+ return previousStateEpisode;
+ }
+ }
+ return null;
+ }
+
+ });
+
+ return !newEpisodes.isEmpty() || !changedEpisodes.isEmpty();
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public Output output(Reaction reaction) {
+ String summary;
+ if (!newEpisodes.isEmpty()) {
+ if (!changedEpisodes.isEmpty()) {
+ summary = String.format("%d new and %d changed Torrent(s) for “%s!”", newEpisodes.size(), changedEpisodes.size(), reaction.name());
+ } else {
+ summary = String.format("%d new Torrent(s) for “%s!”", newEpisodes.size(), reaction.name());
+ }
+ } else {
+ summary = String.format("%d changed Torrent(s) for “%s!”", changedEpisodes.size(), reaction.name());
+ }
+ DefaultOutput output = new DefaultOutput(summary);
+ output.addText("text/plain", generatePlainText(reaction, newEpisodes, changedEpisodes));
+ output.addText("text/html", generateHtmlText(reaction, newEpisodes, changedEpisodes));
+ return output;
+ }
+
+ //
+ // STATIC METHODS
+ //
+
+ /**
+ * Generates the plain text trigger output.
+ *
+ * @param reaction
+ * The reaction that was triggered
+ * @param newEpisodes
+ * The new episodes
+ * @param changedEpisodes
+ * The changed episodes
+ * @return The plain text output
+ */
+ private static String generatePlainText(Reaction reaction, Collection<Episode> newEpisodes, Collection<Episode> changedEpisodes) {
+ StringBuilder stringBuilder = new StringBuilder();
+ if (!newEpisodes.isEmpty()) {
+ stringBuilder.append(reaction.name()).append(" - New Episodes\n\n");
+ for (Episode episode : newEpisodes) {
+ stringBuilder.append("- ").append(episode.identifier()).append("\n");
+ for (TorrentFile torrentFile : episode) {
+ stringBuilder.append(" - ").append(torrentFile.name()).append(", ").append(torrentFile.size()).append("\n");
+ stringBuilder.append(" Magnet: ").append(torrentFile.magnetUri()).append("\n");
+ stringBuilder.append(" Download: ").append(torrentFile.downloadUri()).append("\n");
+ }
+ }
+ }
+ if (!changedEpisodes.isEmpty()) {
+ stringBuilder.append(reaction.name()).append(" - Changed Episodes\n\n");
+ for (Episode episode : changedEpisodes) {
+ stringBuilder.append("- ").append(episode.identifier()).append("\n");
+ for (TorrentFile torrentFile : episode) {
+ stringBuilder.append(" - ").append(torrentFile.name()).append(", ").append(torrentFile.size()).append("\n");
+ stringBuilder.append(" Magnet: ").append(torrentFile.magnetUri()).append("\n");
+ stringBuilder.append(" Download: ").append(torrentFile.downloadUri()).append("\n");
+ }
+ }
+ }
+ return stringBuilder.toString();
+ }
+
+ /**
+ * Generates the HTML trigger output.
+ *
+ * @param reaction
+ * The reaction that was triggered
+ * @param newEpisodes
+ * The new episodes
+ * @param changedEpisodes
+ * The changed episodes
+ * @return The HTML output
+ */
+ private static String generateHtmlText(Reaction reaction, Collection<Episode> newEpisodes, Collection<Episode> changedEpisodes) {
+ StringBuilder htmlBuilder = new StringBuilder();
+ htmlBuilder.append("<html><body>\n");
+ htmlBuilder.append("<h1>").append(StringEscapeUtils.escapeHtml4(reaction.name())).append("</h1>\n");
+ if (!newEpisodes.isEmpty()) {
+ htmlBuilder.append("<h2>New Episodes</h2>\n");
+ htmlBuilder.append("<ul>\n");
+ for (Episode episode : newEpisodes) {
+ htmlBuilder.append("<li>Season ").append(episode.season()).append(", Episode ").append(episode.episode()).append("</li>\n");
+ htmlBuilder.append("<ul>\n");
+ for (TorrentFile torrentFile : episode) {
+ htmlBuilder.append("<li>").append(StringEscapeUtils.escapeHtml4(torrentFile.name())).append("</li>\n");
+ htmlBuilder.append("<div>");
+ htmlBuilder.append("<strong>").append(StringEscapeUtils.escapeHtml4(torrentFile.size())).append("</strong>, ");
+ htmlBuilder.append("<strong>").append(torrentFile.fileCount()).append("</strong> file(s), ");
+ htmlBuilder.append("<strong>").append(torrentFile.seedCount()).append("</strong> seed(s), ");
+ htmlBuilder.append("<strong>").append(torrentFile.leechCount()).append("</strong> leecher(s)</div>\n");
+ htmlBuilder.append("<div><a href=\"").append(StringEscapeUtils.escapeHtml4(torrentFile.magnetUri())).append("\">Magnet</a> ");
+ htmlBuilder.append("<a href=\"").append(StringEscapeUtils.escapeHtml4(torrentFile.downloadUri())).append("\">Download</a></div>\n");
+ }
+ htmlBuilder.append("</ul>\n");
+ }
+ htmlBuilder.append("</ul>\n");
+ }
+ if (!changedEpisodes.isEmpty()) {
+ htmlBuilder.append("<h2>Changed Episodes</h2>\n");
+ htmlBuilder.append("<ul>\n");
+ for (Episode episode : changedEpisodes) {
+ htmlBuilder.append("<li>Season ").append(episode.season()).append(", Episode ").append(episode.episode()).append("</li>\n");
+ htmlBuilder.append("<ul>\n");
+ for (TorrentFile torrentFile : episode) {
+ htmlBuilder.append("<li>").append(StringEscapeUtils.escapeHtml4(torrentFile.name())).append("</li>\n");
+ htmlBuilder.append("<div>");
+ htmlBuilder.append("<strong>").append(StringEscapeUtils.escapeHtml4(torrentFile.size())).append("</strong>, ");
+ htmlBuilder.append("<strong>").append(torrentFile.fileCount()).append("</strong> file(s), ");
+ htmlBuilder.append("<strong>").append(torrentFile.seedCount()).append("</strong> seed(s), ");
+ htmlBuilder.append("<strong>").append(torrentFile.leechCount()).append("</strong> leecher(s)</div>\n");
+ htmlBuilder.append("<div><a href=\"").append(StringEscapeUtils.escapeHtml4(torrentFile.magnetUri())).append("\">Magnet</a> ");
+ htmlBuilder.append("<a href=\"").append(StringEscapeUtils.escapeHtml4(torrentFile.downloadUri())).append("\">Download</a></div>\n");
+ }
+ htmlBuilder.append("</ul>\n");
+ }
+ htmlBuilder.append("</ul>\n");
+ }
+ htmlBuilder.append("</body></html>\n");
+ return htmlBuilder.toString();
+ }
+
+}