# The Cache Buster extension
class Middleman::Extensions::CacheBuster < ::Middleman::Extension
  option :exts, %w(.css .png .jpg .jpeg .webp .svg .svgz .js .gif), 'List of extensions that get cache busters strings appended to them.'
  option :sources, %w(.htm .html .php .css .js), 'List of extensions that are searched for bustable assets.'
  option :ignore, [], 'Regexes of filenames to skip adding query strings to'
  option :rewrite_ignore, [], 'Regexes of filenames to skip processing for path rewrites'

  def initialize(app, options_hash={}, &block)
    super

    app.rewrite_inline_urls id: :cache_buster,
                            url_extensions: options.exts,
                            source_extensions: options.sources,
                            ignore: options.ignore,
                            rewrite_ignore: options.rewrite_ignore,
                            proc: method(:rewrite_url)
  end

  Contract String, Or[String, Pathname], Any => String
  def rewrite_url(asset_path, _dirpath, _request_path)
    asset_path + '?' + Time.now.strftime('%s')
  end
end