Spree.prepareAttachmentUploader = ->
  uploadZone = document.getElementById('attachment-upload-zone')
  if !uploadZone
    return

  attachmentUploads = new (Backbone.Collection)
  progressZone = document.getElementById('progress-zone')
  variantId = document.querySelector('input[name="attachment[viewable_id]"]').value

  new (Spree.Views.Attachments.UploadZone)(
    el: uploadZone
    collection: attachmentUploads
  )

  attachmentUploads.on 'add', (progressModel) ->
    progressModel.set variant_id: variantId

    progressView = new (Spree.Views.Images.UploadProgress)(model: progressModel)
    progressZone.appendChild progressView.render().el
    return

  return

Spree.ready ->
  Spree.prepareAttachmentUploader()
  return