Add XKCD comic filter and watcher.

diff --git a/src/main/java/net/pterodactylus/rhynodge/filters/comics/XkcdComicFilter.java b/src/main/java/net/pterodactylus/rhynodge/filters/comics/XkcdComicFilter.java
new file mode 100644 (file)
index 0000000..ae80654
--- /dev/null
+++ b/src/main/java/net/pterodactylus/rhynodge/filters/comics/XkcdComicFilter.java
@@ -0,0 +1,87 @@
+/*
+ * rhynodge - XkcdFilter.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.filters.comics;
+
+import java.util.List;
+
+import net.pterodactylus.rhynodge.filters.ComicSiteFilter;
+
+import com.google.common.base.Function;
+import com.google.common.base.Optional;
+import com.google.common.collect.FluentIterable;
+import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
+import org.jsoup.select.Elements;
+
+/**
+ * {@link ComicSiteFilter} implementation that can parse XKCD comics.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class XkcdComicFilter extends ComicSiteFilter {
+
+       @Override
+       protected Optional<String> extractTitle(Document document) {
+               Elements titleElement = document.select("div#ctitle");
+               return titleElement.hasText() ? Optional.of(titleElement.text()) : Optional.<String>absent();
+       }
+
+       @Override
+       protected List<String> extractImageUrls(Document document) {
+               return extractImages(document).transform(new Function<String[], String>() {
+
+                       @Override
+                       public String apply(String[] input) {
+                               return input[0];
+                       }
+               }).toList();
+       }
+
+       @Override
+       protected List<String> extractImageComments(Document document) {
+               return extractImages(document).transform(new Function<String[], String>() {
+
+                       @Override
+                       public String apply(String[] input) {
+                               return input[1];
+                       }
+               }).toList();
+       }
+
+       //
+       // PRIVATE METHODS
+       //
+
+       /**
+        * Extracts pairs of image URLs and image comments from the given document.
+        *
+        * @param document
+        *              The document to extract the images from
+        * @return An iterable containing all image URL and comment pairs
+        */
+       private FluentIterable<String[]> extractImages(Document document) {
+               return FluentIterable.from(document.select("div#comic img")).transform(new Function<Element, String[]>() {
+
+                       @Override
+                       public String[] apply(Element image) {
+                               return new String[] { image.attr("src"), image.attr("title") };
+                       }
+               });
+       }
+
+}

diff --git a/src/main/java/net/pterodactylus/rhynodge/watchers/XkcdWatcher.java b/src/main/java/net/pterodactylus/rhynodge/watchers/XkcdWatcher.java
new file mode 100644 (file)
index 0000000..360652a
--- /dev/null
+++ b/src/main/java/net/pterodactylus/rhynodge/watchers/XkcdWatcher.java
@@ -0,0 +1,40 @@
+/*
+ * rhynodge - SinfestWacher.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.watchers;
+
+import java.util.Arrays;
+
+import net.pterodactylus.rhynodge.filters.HtmlFilter;
+import net.pterodactylus.rhynodge.filters.comics.XkcdComicFilter;
+import net.pterodactylus.rhynodge.queries.HttpQuery;
+import net.pterodactylus.rhynodge.triggers.NewComicTrigger;
+
+/**
+ * {@link net.pterodactylus.rhynodge.Watcher} implementation that watches XKCD
+ * for new comics.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class XkcdWatcher extends DefaultWatcher {
+
+       /** Creates a new XKCD watcher. */
+       public XkcdWatcher() {
+               super(new HttpQuery("http://xkcd.com/"), Arrays.asList(new HtmlFilter(), new XkcdComicFilter()), new NewComicTrigger());
+       }
+
+}