class Sprockets::UglifierCompressor

def call(input)
  case Autoload::Uglifier::VERSION.to_i
  when 1
    raise "uglifier 1.x is no longer supported, please upgrade to 2.x or newer"
  when 2
    input_options = { source_filename: input[:filename] }
  else
    input_options = { source_map: { filename: input[:filename] } }
  end
  uglifier = Autoload::Uglifier.new(@options.merge(input_options))
  js, map = uglifier.compile_with_map(input[:data])
  map = SourceMapUtils.format_source_map(JSON.parse(map), input)
  map = SourceMapUtils.combine_source_maps(input[:metadata][:map], map)
  { data: js, map: map }
end