module WebFont
  class Downloader

    attr_reader :finder

    def initialize
      @finder = WebFont::Finder.new
    end

    # Download font from Google and save it locally
    #
    # Returns nothing
    def download(font_family, destination_path, from_cache = true)
      item = finder.find(font_family)
      return if item.empty?

      font_family = item['family'].gsub(/\s/, '-')
      item['files'].each do |variant, url|
        filename  = "#{font_family}-#{variant}#{File.extname(url)}"
        font_path = File.join(destination_path, filename)

        if from_cache && LocalCache.enable? && cache_path = LocalCache.path(filename)
          FileUtils.copy(cache_path, destination_path)
        else
          unless File.exist?(font_path)
            WebFont::Command.wget(url, font_path)
            LocalCache.save(font_path)
          end
        end
      end
    end
  end
end