Async templates

lib/template.js

@@ -1,4 +1,5 @@
 var _ = require('underscore'),
+    async = require('async'),
     fs = require('fs'),
     ejs = require('ejs'),
     DEFAULT_SETTINGS = {
@@ -8,33 +9,43 @@ var _ = require('underscore'),
     },
     settings;
 
-function loadFile(tplname, opts) {
-  var tpl = settings.root + '/' + tplname + '.html';
-  return fs.readFileSync(tpl, 'utf8');
-}
-
 function init(opts) {
   settings = _.extend({}, DEFAULT_SETTINGS, opts);
 }
 
-function render(template, opts, cb) {
+function render(template, opts, renderCallback) {
   var body,
-      tpl = loadFile(template);
+      tpl,
+      loaders;
+  opts = _.extend({}, settings, opts);
+  loaders = [
+    function(cb) {
+      fs.readFile(settings.root + '/' + template + '.html', 'utf8', cb);
+    },
+    function(cb) {
+      fs.readFile(settings.root + '/global.json', 'utf8', cb);
+    }
+  ];
+
+  if (opts.layout) {
+    loaders.push(function(cb) {
+      fs.readFile(settings.root + '/' + opts.layout + '.html', 'utf8', cb);
+    });
+  }
 
-  // Globals
-  fs.readFile(settings.root + '/global.json', 'utf8', function(err, data) {
+  async.parallel(loaders, function(err, results){
     if (!err) {
-      opts = _.extend({}, opts, JSON.parse(data));
+      opts = _.extend({}, opts, JSON.parse(results[1]));
     }
-    opts = _.extend({}, settings, opts);
+    body = ejs.render(results[0], opts);
 
-    body = ejs.render(tpl, opts);
-    if (opts.layout) {
-      tpl = loadFile(opts.layout);
+    // Layout
+    if (loaders.length === 3) {
       opts.body = body;
-      body = ejs.render(tpl, opts);
+      body = ejs.render(results[2], opts);
     }
-    return cb(body);
+
+    return renderCallback(body);
   });
 }