Module: Shogi::Format::USI::Board

Defined in:
lib/shogi/format/usi/board.rb

Instance Method Summary collapse

Instance Method Details

#to_usi ⇒ Object Also known as: to_sfen 



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# File 'lib/shogi/format/usi/board.rb', line 5

def to_usi
  @table.map {|row|
    usi_row = ""
    space_count = 0
    row.each do |cell|
      if cell == ""
        space_count += 1
      else
        if space_count > 0
          usi_row << space_count.to_s
          space_count = 0
        end
        usi = Piece.const_get(cell[1..2]).new.usi
        if cell[0] == "-"
          usi_row << usi.downcase
        else
          usi_row << usi
        end
      end
    end
    if space_count > 0
      usi_row << space_count.to_s
      space_count = 0
    end
    usi_row
  }.join("/") << "\n"
end

#usi_captured ⇒ Object Also known as: sfen_captured 



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# File 'lib/shogi/format/usi/board.rb', line 34

def usi_captured
  ['+', '-'].map do |prefix|
    caps = @captured
           .select { |x| x[0] == prefix }
           .map { |x| x[1..-1] }
           .group_by { |x| x }
           .map { |w, ws| [w, ws.length] }
           .to_h
    [Piece::HI,
     Piece::KA,
     Piece::KI,
     Piece::GI,
     Piece::KE,
     Piece::KY,
     Piece::FU].map do |type|
      n = caps[type::CSA_NAME] || 0
      usi = type::USI_NAME
      usi = usi.downcase if prefix == '-'
      "#{n}#{usi}" if n > 0
    end.join
  end.join.tap do |x|
    return '-' if x == ''
  end
end