templates refactor part 2

updated so that tpls get loaded on demand as opposed to all at once on
load; added a function to pull the tpl list on load instead of having to
manually define new templates in code; some clean up; added utils.walk;

src/utils.js

@@ -1,3 +1,5 @@
+var fs = require('fs');
+
 var utils = {
 	generateUUID: function() {
 		return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
@@ -5,6 +7,31 @@ var utils = {
 			return v.toString(16);
 		});
 	},
+
+	//Adapted from http://stackoverflow.com/questions/5827612/node-js-fs-readdir-recursive-directory-search
+	walk: function(dir, done) {
+		var main_dir = global.configuration.ROOT_DIRECTORY + '/public/templates/';
+		var results = [];
+		fs.readdir(dir, function(err, list) {
+		    if (err) return done(err);
+		    var pending = list.length;
+		    if (!pending) return done(null, results);
+		    list.forEach(function(file) {
+				file = dir + '/' + file;
+				fs.stat(file, function(err, stat) {
+					if (stat && stat.isDirectory()) {
+						utils.walk(file, function(err, res) {
+							results = results.concat(res);
+							if (!--pending) done(null, results);
+						});
+					} else {
+						results.push(file.replace(main_dir, '').replace('.tpl', ''));
+						if (!--pending) done(null, results);
+			        }
+				});
+			});
+		});
+	},
 	
 	relativeTime: function(timestamp) {
 		var	now = +new Date(),