design-system-framework/models/PreviewDocument.js

var fs = require('fs'),
	path = require('path'),
	Handlebars = require('handlebars'),
	pageTemplate = Handlebars.compile(fs.readFileSync(path.join(__dirname,'../tpl/PreviewDocument.hbs')).toString());

/*
	Register a special helper for missing vars.
	A missing var will simply return its name:
	{{myMissingVar}} => "myMissingVar"
 */
Handlebars.registerHelper('helperMissing', function(options) {
	var varName = options.name;
    return varName;
});

function PreviewDocument(){
	this.components = [];
}

PreviewDocument.prototype.addComponent = function(component) {
	this.components.push(component);
};

PreviewDocument.prototype.render = function() {

	return pageTemplate({
		component: this.components[0],
		html: this.components[0].render(),
		cacheBust: (new Date()).getTime()
	});
};

module.exports = PreviewDocument;