Contents

module Chess

  # With this module is possible call the method +to_utf8+ on a string. This
  # method convert the chess piece identifier character into UTF8 chess
  # character, for example:
  #     :001 > require 'chess/utf8_notation'
  #      => true
  #     :002 > 'Qf7#'.to_utf8
  #      => '♕f7#'
  #
  # To use this utility explicit require is needed:
  # <tt>require 'chess/utf8_notation'</tt>
  module UTF8Notation

    # Map a piece identifier character with the corresponding UTF8 chess
    # character
    UTF8_MAP = {
      'P' => '♙',
      'R' => '♖',
      'N' => '♘',
      'B' => '♗',
      'Q' => '♕',
      'K' => '♔',
      'p' => '♟',
      'r' => '♜',
      'n' => '♞',
      'b' => '♝',
      'q' => '♛',
      'k' => '♚'
    }

    # Replace the piece identifier characters with UTF8 chess characters
    def to_utf8
      self.gsub(/[PRNBQKprnbqk]/, UTF8_MAP)
    end

  end
end

String.prepend(Chess::UTF8Notation)

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
chess-0.1.3	lib/chess/utf8_notation.rb
chess-0.1.2	lib/chess/utf8_notation.rb
chess-0.1.1	lib/chess/utf8_notation.rb
chess-0.1.0	lib/chess/utf8_notation.rb