From 90d19c992a93d1a54ecf46704acf16361c888465 Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?=
 <bombe@pterodactylus.net>
Date: Thu, 7 Apr 2011 21:06:00 +0200
Subject: [PATCH] Add filter to sort replies differently.

---
 .../sone/template/ReplyGroupFilter.java            | 78 ++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 src/main/java/net/pterodactylus/sone/template/ReplyGroupFilter.java

diff --git a/src/main/java/net/pterodactylus/sone/template/ReplyGroupFilter.java b/src/main/java/net/pterodactylus/sone/template/ReplyGroupFilter.java
new file mode 100644
index 0000000..2567284
--- /dev/null
+++ b/src/main/java/net/pterodactylus/sone/template/ReplyGroupFilter.java
@@ -0,0 +1,78 @@
+/*
+ * Sone - ReplyGroupFilter.java - Copyright © 2010 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 java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import net.pterodactylus.sone.data.Post;
+import net.pterodactylus.sone.data.Reply;
+import net.pterodactylus.sone.data.Sone;
+import net.pterodactylus.util.template.Filter;
+import net.pterodactylus.util.template.TemplateContext;
+
+/**
+ * {@link Filter} implementation that groups replies by the post the are in
+ * reply to, returning a map with the post as key and the list of replies as
+ * values.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class ReplyGroupFilter implements Filter {
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public Object format(TemplateContext templateContext, Object data, Map<String, String> parameters) {
+		@SuppressWarnings("unchecked")
+		List<Reply> allReplies = (List<Reply>) data;
+		Map<Post, Set<Sone>> postSones = new HashMap<Post, Set<Sone>>();
+		Map<Post, Set<Reply>> postReplies = new HashMap<Post, Set<Reply>>();
+		for (Reply reply : allReplies) {
+			Post post = reply.getPost();
+			Set<Sone> sones = postSones.get(post);
+			if (sones == null) {
+				sones = new HashSet<Sone>();
+				postSones.put(post, sones);
+			}
+			sones.add(reply.getSone());
+			Set<Reply> replies = postReplies.get(post);
+			if (replies == null) {
+				replies = new HashSet<Reply>();
+				postReplies.put(post, replies);
+			}
+			replies.add(reply);
+		}
+		Map<Post, Map<String, Set<?>>> result = new HashMap<Post, Map<String, Set<?>>>();
+		for (Post post : postSones.keySet()) {
+			if (result.containsKey(post)) {
+				continue;
+			}
+			Map<String, Set<?>> postResult = new HashMap<String, Set<?>>();
+			postResult.put("sones", postSones.get(post));
+			postResult.put("replies", postReplies.get(post));
+			result.put(post, postResult);
+		}
+		return result;
+	}
+
+}
-- 
2.7.4