Get image dimensions in coffeescript

image_dimensions.coffee

    onRender: ->
      @$('#fileupload').fileupload
        dropZone: @$(@itemViewContainer)
        headers:
          token: App.Entities.Session.getCurrentSession().get("token")
        dataType: 'json',
        # done: (e, data) =>
          # @collection.push(new App.Entities.Image(data.result))
        add: (e, data) =>
          @getFileSize(data)

    getFileSize: (data) ->
      $.each(data.files, (index, file) =>
        @_getFileSize(file, data)
      )
      data.submit()

    _getFileSize: (file, data) ->
      reader = new FileReader()
      img = new Image()

      reader.onload = (e) =>
        img.src = e.target.result
        @collection.push(new App.Entities.Image(gallery_path: img.src))
        img.onload = ->
          console.log("width=" + @width + " height=" + @height)

      reader.readAsDataURL file