embercompiled.js

var fs = require('fs');
var vm = require('vm');

var log = console.log;

var emberjs = fs.readFileSync('client/code/libs/ember-1.0.pre.min.js', 'utf8');
var handlebarsjs = fs.readFileSync('client/code/libs/handlebars-1.0.0.beta.6.js', 'utf8');
var system = require('../system');

var uglifyjs = require('uglify-js');


exports.init = function(root, config) {

  return {
    name: 'Ember.js',
    process: function(template, path, id) {

      var templatesDir = 'client/static/assets/main';
      var fileName = id;
      var file = templatesDir + '/' + fileName;

      //dummy jQuery
      var jQuery = function() { return jQuery; };
      jQuery.ready = function() { return jQuery; };
      jQuery.inArray = function() { return jQuery; };
      jQuery.jquery = "1.7.2";
      jQuery.event = {fixHooks: {}};

      //dummy DOM element
      var element = {
        firstChild: function () { return element; },
        innerHTML: function () { return element; }
      };

      var sandbox = {
        // DOM
        document: {
          createRange: false,
          createElement: function() { return element; }
        },

        // Console
        console: console,

        // jQuery
        jQuery: jQuery,
        $: jQuery,

        // handlebars template to compile
        template: template, //fs.readFileSync(file, 'utf8'),

        // compiled handlebars template
        templatejs: null

      };

      // window
      sandbox.window = sandbox;

      // create a context for the vm using the sandbox data
      var context = vm.createContext(sandbox);
      // load Ember into the sandbox
      vm.runInContext(handlebarsjs, context, 'handlebars.js');

      vm.runInContext(emberjs, context, 'ember.js');

      //compile the handlebars template inside the vm context
      vm.runInContext('templatejs = Ember.Handlebars.precompile(template).toString();', context);

      var namedTemplateJs = 'Ember.TEMPLATES["' + fileName.replace(/.html/, '') + '"] = Handlebars.template(' + context.templatejs + ');';

      //extract the compiled template from the vm context and save to .js file
      fs.writeFileSync(file+'.js', minifyJS(namedTemplateJs), 'utf8');
      log(('  Created and compiled Handlebars file ' + file + '.js').grey); //.substr(ss.root.length)

      return '<script src="/assets/main/'+fileName+'.js" type="text/javascript"></script>';
    }
  };
};

minifyJS = function(originalCode) {
  var ast, jsp, pro;
  jsp = uglifyjs.parser;
  pro = uglifyjs.uglify;
  ast = jsp.parse(originalCode);
  ast = pro.ast_mangle(ast);
  ast = pro.ast_squeeze(ast);
  return pro.gen_code(ast) + ';';
};