added popular rss feed

src/feed.js

@@ -159,4 +159,49 @@
 			});
 		});
 	};
+
+	Feed.updatePopular = function(callback) {
+		topics.getTopicsFromSet(0, 'topics:posts', 0, 19, function (err, popularData) {
+			var	feed = new rss({
+					title: 'Popular Topics',
+					description: 'A list of topics that are sorted by post count',
+					feed_url: Feed.defaults.baseUrl + '/popular.rss',
+					site_url: nconf.get('url') + '/popular',
+					ttl: Feed.defaults.ttl
+				});
+
+			// Add pubDate if recent topics list contains topics
+			if (popularData.topics.length > 0) {
+				feed.pubDate = new Date(parseInt(popularData.topics[0].lastposttime, 10)).toUTCString();
+			}
+
+			async.eachSeries(popularData.topics, function(topicData, next) {
+				feed.item({
+					title: topicData.title,
+					url: nconf.get('url') + '/topic/' + topicData.slug,
+					author: topicData.username,
+					date: new Date(parseInt(topicData.lastposttime, 10)).toUTCString()
+				});
+				next();
+			}, function() {
+				Feed.saveFeed('feeds/popular.rss', feed, function (err) {
+					if (process.env.NODE_ENV === 'development') {
+						winston.info('[rss] Re-generated "popular posts" RSS Feed.');
+					}
+
+					if (callback) callback();
+				});
+			});
+		});
+	};
+
+	Feed.loadFeed = function(rssPath, res) {
+		fs.readFile(rssPath, function (err, data) {
+			if (err) {
+				res.type('text').send(404, "Unable to locate an rss feed at this location.");
+			} else {
+				res.type('xml').set('Content-Length', data.length).send(data);
+			}
+		});
+	};
 }(exports));

src/webserver.js

@@ -832,31 +832,34 @@ module.exports.server = server;
 		});
 
 		app.get('/recent.rss', function(req, res) {
-			var rssPath = path.join(__dirname, '../', 'feeds/recent.rss'),
-				loadFeed = function () {
-					fs.readFile(rssPath, function (err, data) {
-						if (err) {
-							res.type('text').send(404, "Unable to locate an rss feed at this location.");
-						} else {
-							res.type('xml').set('Content-Length', data.length).send(data);
-						}
-					});
-
-				};
+			var rssPath = path.join(__dirname, '../', 'feeds/recent.rss');
 
 			if (!fs.existsSync(rssPath)) {
 				feed.updateRecent(function (err) {
 					if (err) {
 						res.redirect('/404');
 					} else {
-						loadFeed();
+						feed.loadFeed(rssPath, res);
 					}
 				});
 			} else {
-				loadFeed();
+				feed.loadFeed(rssPath, res);
 			}
 		});
 
+		app.get('/popular.rss', function(req, res) {
+			var rssPath = path.join(__dirname, '../', 'feeds/popular.rss');
+
+			feed.updatePopular(function (err) {
+				if (err) {
+					res.redirect('/404');
+				} else {
+					feed.loadFeed(rssPath, res);
+				}
+			});
+
+		});
+
 		app.get('/recent/:term?', function (req, res) {
 			// TODO consolidate with /recent route as well -> that can be combined into this area. See "Basic Routes" near top.
 			app.build_header({