Class: ChessGame

Inherits:
Object
  • Object
show all
Defined in:
lib/bangkok/chessgame.rb

Overview

A ChessGame can read a chess play file and write a MIDI file created from the moves in the file.

Instance Method Summary collapse

Constructor Details

#initialize(listener = GameListener.new) ⇒ ChessGame

Returns a new instance of ChessGame.



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# File 'lib/bangkok/chessgame.rb', line 11

def initialize(listener = GameListener.new)
  @listener = listener
end

Instance Method Details

#play(io) ⇒ Object

Writes a MIDI file.



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# File 'lib/bangkok/chessgame.rb', line 43

def play(io)
  @listener.start_game(io)
  board = Board.new(@listener)
  @moves.each { | move | board.apply(move) }
  @listener.end_game
end

#read(io) ⇒ Object

Read the chess game. Set player names and return a string containing the chess moves (“1. f4 Nf6 2. Nf3 c5…”).



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# File 'lib/bangkok/chessgame.rb', line 27

def read(io)
  game_text = ''
  io.each { | line |
    line.chomp!
    case line
    when /\[(.*)\]/           # New games starting (if multi-game file)
    when /^\s*$/
    else
      game_text << ' '
      game_text << line
    end
  }
  game_text
end

#read_moves(io) ⇒ Object

Read the chess game and turn it into Moves.



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# File 'lib/bangkok/chessgame.rb', line 16

def read_moves(io)
  game_text = read(io)
  @moves = []
  game_text.scan(/\d+\.\s+(\S+)\s+(\S+)/).each { | white, black |
    @moves << Move.new(:white, white)
    @moves << Move.new(:black, black) unless black == '1-0' || black == '0-1'
  }
end