From 9a884536fcf2d56a822b8db44bbc9ca56a61cea2 Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?=
 <bombe@pterodactylus.net>
Date: Mon, 14 Nov 2011 21:23:58 +0100
Subject: [PATCH] Add custom accessor for images.

---
 .../pterodactylus/sone/template/ImageAccessor.java | 64 ++++++++++++++++++++++
 .../net/pterodactylus/sone/web/WebInterface.java   |  2 +
 2 files changed, 66 insertions(+)
 create mode 100644 src/main/java/net/pterodactylus/sone/template/ImageAccessor.java

diff --git a/src/main/java/net/pterodactylus/sone/template/ImageAccessor.java b/src/main/java/net/pterodactylus/sone/template/ImageAccessor.java
new file mode 100644
index 0000000..1c06d31
--- /dev/null
+++ b/src/main/java/net/pterodactylus/sone/template/ImageAccessor.java
@@ -0,0 +1,64 @@
+/*
+ * Sone - ImageAccessor.java - Copyright © 2011 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.sone.template;
+
+import net.pterodactylus.sone.data.Album;
+import net.pterodactylus.sone.data.Image;
+import net.pterodactylus.util.template.Accessor;
+import net.pterodactylus.util.template.ReflectionAccessor;
+import net.pterodactylus.util.template.TemplateContext;
+
+/**
+ * {@link Accessor} implementation for {@link Image} objects. It adds the
+ * following properties:
+ * <ul>
+ * <li>{@code previous}: returns the previous image in the image’s album, or
+ * {@code null} if the image is the first image of its album.</li>
+ * <li>{@code next}: returns the next image in the image’s album, or {@code
+ * null} if the image is the last image of its album.</li>
+ * </ul>
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class ImageAccessor extends ReflectionAccessor {
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public Object get(TemplateContext templateContext, Object object, String member) {
+		Image image = (Image) object;
+		if ("next".equals(member)) {
+			Album album = image.getAlbum();
+			int imagePosition = album.getImages().indexOf(image);
+			if (imagePosition < album.getImages().size() - 1) {
+				return album.getImages().get(imagePosition + 1);
+			}
+			return null;
+		} else if ("previous".equals(member)) {
+			Album album = image.getAlbum();
+			int imagePosition = album.getImages().indexOf(image);
+			if (imagePosition > 0) {
+				return album.getImages().get(imagePosition - 1);
+			}
+			return null;
+		}
+		return super.get(templateContext, object, member);
+	}
+
+}
diff --git a/src/main/java/net/pterodactylus/sone/web/WebInterface.java b/src/main/java/net/pterodactylus/sone/web/WebInterface.java
index 4c41581..5ba3be7 100644
--- a/src/main/java/net/pterodactylus/sone/web/WebInterface.java
+++ b/src/main/java/net/pterodactylus/sone/web/WebInterface.java
@@ -53,6 +53,7 @@ import net.pterodactylus.sone.template.CollectionAccessor;
 import net.pterodactylus.sone.template.CssClassNameFilter;
 import net.pterodactylus.sone.template.HttpRequestAccessor;
 import net.pterodactylus.sone.template.IdentityAccessor;
+import net.pterodactylus.sone.template.ImageAccessor;
 import net.pterodactylus.sone.template.ImageLinkFilter;
 import net.pterodactylus.sone.template.JavascriptFilter;
 import net.pterodactylus.sone.template.ParserFilter;
@@ -231,6 +232,7 @@ public class WebInterface implements CoreListener {
 		templateContextFactory.addAccessor(Post.class, new PostAccessor(getCore()));
 		templateContextFactory.addAccessor(Reply.class, new ReplyAccessor(getCore()));
 		templateContextFactory.addAccessor(Album.class, new AlbumAccessor());
+		templateContextFactory.addAccessor(Image.class, new ImageAccessor());
 		templateContextFactory.addAccessor(Identity.class, new IdentityAccessor(getCore()));
 		templateContextFactory.addAccessor(Trust.class, new TrustAccessor());
 		templateContextFactory.addAccessor(HTTPRequest.class, new HttpRequestAccessor());
-- 
2.7.4