Contents

module Backend

  module File

    # Index data dumped in the text format.
    #
    class Text < Basic

      # Uses the extension "txt".
      #
      def extension
        :txt
      end
      # Text files are used exclusively for
      # prepared data files.
      #
      def load
        raise "Can't load from text file. Use JSON or Marshal."
      end
      # Text files are used exclusively for
      # prepared data files.
      #
      def dump hash
        raise "Can't dump to text file. Use JSON or Marshal."
      end

      # Retrieves prepared index data in the form
      # * id,data\n
      # * id,data\n
      # * id,data\n
      #
      # Yields an id string and a symbol token.
      #
      def retrieve
        id    = nil
        token = nil
        ::File.open(cache_path, 'r:binary') do |file|
          file.each_line do |line|
            id, token = line.split ?,, 2
            yield id, (token.chomp! || token).to_sym
          end
        end
      end

      #
      #
      def open_for_indexing &block
        ::File.open cache_path, 'w:binary', &block
      end


    end

  end

end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
picky-2.6.0	lib/picky/backend/file/text.rb