Module: Voltron::Crop::Base::ClassMethods

Defined in:
lib/voltron/crop/active_record/base.rb

Instance Method Summary collapse

Instance Method Details

#mount_uploader(*args) ⇒ Object 



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# File 'lib/voltron/crop/active_record/base.rb', line 9

def mount_uploader(*args)
  super *args

  column = args.first.to_sym

  attr_accessor "#{column}_x", "#{column}_y", "#{column}_w", "#{column}_h", "#{column}_zoom"

  after_validation do
    upload = send(column)

    if errors.empty? && upload.present?
      # Create a temp file to store the newly cropped image
      to = Tempfile.new([column.to_s, File.extname(upload.path)])

      dimensions = [send("#{column}_w"), send("#{column}_w")].join('x')
      coordinates = [send("#{column}_x"), send("#{column}_y")].join('+')

      # Crop the image, scale up if it's smaller than the required crop size
      img = upload.url.starts_with?('http') ? ::MiniMagick::Image.open(upload.url) : ::MiniMagick::Image.open(upload.path)
      img.crop("#{dimensions}+#{coordinates}")
      if img.width < Voltron.config.crop.min_width || img.height < Voltron.config.crop.min_height
        img.resize "#{Voltron.config.crop.min_width}x#{Voltron.config.crop.min_height}"
      end
      img.write to.path
      to.close

      input_name = ActionView::Helpers::Tags::Base.new(ActiveModel::Naming.param_key(self), column, nil).send(:tag_name)

      file = ActionDispatch::Http::UploadedFile.new({
        type: upload.content_type,
        filename: upload.file.filename,
        head: "Content-Disposition: form-data; name=\"#{input_name}\"; filename=\"#{upload.filename}\"\r\nContent-Type: #{upload.content_type}\r\n",
        tempfile: to
      })

      send("#{column}=", file)

    end
  end
end