Ruby ResizeIO Client

resizeio_helper.rb

module ResizeioHelper
  def resizeio_image_tag(original, options={})
    rio_options = extract_resizeio_options(options)

    image_tag resizeio_url(original, rio_options), options
  end

  def extract_resizeio_options(options)
    retina = !!options.delete(:retina)
    multiplier = retina ? 2 : 1
    transformation = options.delete(:t) || options.delete(:transformation)
    rio_options = {}
    rio_options[:t] = transformation if transformation
    rio_options[:w] = options[:width] if options[:width]
    rio_options[:h] = options[:height] if options[:height]
    rio_options[:m] = multiplier
    rio_options
  end

  def resizeio_url(original, params={})
    url = URI original
    url.host = CONFIG.resizeio_host
    url.query = params.to_query
    url.to_s
  end
end