require 'image_optim'

class ImageOptim
  class Jpegtran < Worker
    # Copy all chunks or none (defaults to false)
    attr_reader :copy

    # Create progressive JPEG file (defaults to true)
    attr_reader :progressive

  private

    def parse_options(options)
      get_option!(options, :copy, false){ |v| !!v }
      get_option!(options, :progressive, true){ |v| !!v }
    end

    def command_args(src, dst)
      args = %W[-optimize -outfile #{dst} #{src}]
      args.unshift '-copy', copy ? 'all' : 'none'
      args.unshift '-progressive' if progressive
      args
    end
  end
end