class IMGKit class Source def initialize(url_file_or_html) @source = url_file_or_html end def url? @source.is_a?(String) && @source.match(/\Ahttp/) end def file? @source.kind_of?(File) || @source.kind_of?(Tempfile) end def html? !(url? || file?) end def to_s file? ? @source.path : @source end end end