Class: Egd::FenToBoard

Inherits:
Object
  • Object
show all
Defined in:
lib/egd/fen_to_board.rb

Constant Summary collapse

LETTER_VALUES = 
%w|_ a b c d e f g h|.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(fen) ⇒ FenToBoard

Egd::FenToBoard.new(fen_string)



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# File 'lib/egd/fen_to_board.rb', line 14

def initialize(fen)
  @fen = fen
end

Instance Attribute Details

#fen ⇒ Object (readonly)

this service parses a FEN string into a hash-representation of a chess board and pieces So you can do board = Egd::FenToBoard.new(fen_string) board #=> “P” # as in white pawn



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# File 'lib/egd/fen_to_board.rb', line 8

def fen
  @fen
end

Instance Method Details

#[](square) ⇒ Object 



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# File 'lib/egd/fen_to_board.rb', line 18

def [](square)
  board_hash[square]
end

#boardline ⇒ Object 



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# File 'lib/egd/fen_to_board.rb', line 22

def boardline
  # this replaces numbers with corresponding amount of dashes
  @boardline ||= parsed_fen[:board].gsub(%r'\d') do |match|
    "-" * match.to_i
  end.gsub("/", "")
end