From 2bf38ec84b0660924fadf12b2c97a752a1bfecba Mon Sep 17 00:00:00 2001
From: barisusakli <barisusakli@gmail.com>
Date: Tue, 22 Jul 2014 17:58:27 -0400
Subject: [PATCH] handle pinned topics

---
 src/categories/recentreplies.js | 42 ++++++++++++++++++++++++++-------
 src/topics/posts.js             | 15 +++++++++---
 2 files changed, 46 insertions(+), 11 deletions(-)

diff --git a/src/categories/recentreplies.js b/src/categories/recentreplies.js
index ae6f41fe4c..62dc8929d4 100644
--- a/src/categories/recentreplies.js
+++ b/src/categories/recentreplies.js
@@ -24,21 +24,47 @@ module.exports = function(Categories) {
 	};
 
 	Categories.getRecentTopicReplies = function(cid, uid, count, callback) {
-		if (!parseInt(count, 10)) {
+		count = parseInt(count, 10);
+		if (!count) {
 			return callback(null, []);
 		}
 
-		db.getSortedSetRevRange('categories:' + cid + ':tid', 0, count - 1, function(err, tids) {
-			if (err || !tids || !tids.length) {
+		db.getSortedSetRevRange('categories:recent_posts:cid:' + cid, 0, 0, function(err, pids) {
+			if (err || !pids || !pids.length) {
 				return callback(err, []);
 			}
 
-			async.map(tids, topics.getLatestUndeletedPid, function(err, pids) {
-				pids = pids.filter(function(pid) {
-					return !!pid;
-				});
+			if (count === 1) {
+				return posts.getPostSummaryByPids(pids, {stripTags: true}, callback);
+			}
 
-				posts.getPostSummaryByPids(pids, {stripTags: true}, callback);
+			async.parallel({
+				pinnedTids: function(next) {
+					db.getSortedSetRevRangeByScore('categories:' + cid + ':tid', 0, -1, Infinity, Date.now(), next);
+				},
+				tids: function(next) {
+					db.getSortedSetRevRangeByScore('categories:' + cid + ':tid', 0, Math.max(0, count - 1), Date.now(), 0, next);
+				}
+			}, function(err, results) {
+				if (err) {
+					return callback(err);
+				}
+
+				results.tids = results.tids.concat(results.pinnedTids);
+
+				async.map(results.tids, topics.getLatestUndeletedPid, function(err, topicPids) {
+					pids = pids.concat(topicPids).filter(function(pid, index, array) {
+						return !!pid && array.indexOf(pid) === index;
+					});
+
+					posts.getPostSummaryByPids(pids, {stripTags: true}, function(err, posts) {
+						posts = posts.sort(function(a, b) {
+							return parseInt(b.timestamp, 10) - parseInt(a.timestamp, 10);
+						}).slice(0, count);
+
+						callback(err, posts);
+					});
+				});
 			});
 		});
 	};
diff --git a/src/topics/posts.js b/src/topics/posts.js
index 8c755dd393..a61e67915a 100644
--- a/src/topics/posts.js
+++ b/src/topics/posts.js
@@ -134,16 +134,25 @@ module.exports = function(Topics) {
 	};
 
 	Topics.getLatestUndeletedPid = function(tid, callback) {
-		db.getSortedSetRevRange('tid:' + tid + ':posts', 0, -1, function(err, pids) {
+		async.parallel({
+			mainPid: function(next) {
+				Topics.getTopicField(tid, 'mainPid', next);
+			},
+			pids: function(next) {
+				db.getSortedSetRevRange('tid:' + tid + ':posts', 0, -1, next);
+			}
+		}, function(err, results) {
 			if(err) {
 				return callback(err);
 			}
 
-			if (!pids || !pids.length) {
+			if (!results.mainPid && (!Array.isArray(results.pids) || !results.pids.length)) {
 				return callback(null, null);
 			}
 
-			async.detectSeries(pids, function(pid, next) {
+			results.pids.push(results.mainPid);
+
+			async.detectSeries(results.pids, function(pid, next) {
 				posts.getPostField(pid, 'deleted', function(err, deleted) {
 					next(parseInt(deleted, 10) === 0);
 				});