CoffeeScript and Handlebars

application.coffee

window.template_manager = new TemplateManager()

configuration = {}

template_manager.load_template "tabs", "/templates/_tabitems.handlebars", -> 
  markup = template_manager.transform "tabs", configuration

template_manager.coffee

class window.TemplateManager
  
  constructor: () ->
    @templates = new Array
    @contexts = new Array
    
  add_template: (name, template) ->
    @templates[name] = template
  
  load_template: (name, path, callback) ->
    
    template = @templates[name]
    console.log("Template key #{name} already exists") if template?
    
    if !template?
      $.ajax
        url: path
        success: (template_source) =>
          @add_template name, Handlebars.compile(template_source)
          callback() if callback?
    else
      callback() if callback?
          
  transform: (name, context) ->
    # load the last context if the passed one is blank
    context = @contexts[name] if !context?
    template = @templates[name]
    
    @contexts[name] = context
    template context