From d98b6e32d1d5f31dfd6abd050c88ff7767cfc3f0 Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?=
 <bombe@pterodactylus.net>
Date: Mon, 25 Feb 2013 07:11:13 +0100
Subject: [PATCH] Add XKCD comic filter and watcher.

---
 .../rhynodge/filters/comics/XkcdComicFilter.java   | 87 ++++++++++++++++++++++
 .../rhynodge/watchers/XkcdWatcher.java             | 40 ++++++++++
 2 files changed, 127 insertions(+)
 create mode 100644 src/main/java/net/pterodactylus/rhynodge/filters/comics/XkcdComicFilter.java
 create mode 100644 src/main/java/net/pterodactylus/rhynodge/watchers/XkcdWatcher.java

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
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
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());
+	}
+
+}
-- 
2.7.4