module Scrivito

class BinaryRouting < Struct.new(:request, :scrivito_engine)
  def binary_url(binary)
    binary_url_from_cache(binary) || binary_redirect_url(binary)
  end

  def binary_obj_url(obj, binary, image_options = {})
    binary = if image_options.has_key?(:transform)
      apply_custom_transformation(binary, image_options[:transform])
    else
      apply_default_transformation(binary, obj)
    end
    binary_url(binary)
  end

  def resolved_binary_obj_url(obj, binary)
    apply_default_transformation(binary, obj).url
  end

  private

  def binary_url_from_cache(binary)
    if url_from_cache = binary.url_from_cache
      BinaryRewrite.call(request, url_from_cache)
    end
  end

  def binary_redirect_url(binary)
    encrypted_params = BinaryParamVerifier.generate(binary)
    scrivito_engine.binary_path(encrypted_params: encrypted_params)
  end

  def apply_custom_transformation(binary, transformation_definition)
    if transformation_definition
      binary.transform(transformation_definition)
    else
      binary
    end
  end

  def apply_default_transformation(binary, obj)
    if (transformation_definition = Scrivito::Configuration.default_image_transformation) &&
        obj.apply_image_transformation?
      binary.transform(transformation_definition)
    else
      binary
    end
  end
end

end