Module: Shogi::Format::CSA::Board

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

Instance Method Summary collapse

Instance Method Details

#parse_from_csa(csa) ⇒ Object 



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# File 'lib/shogi/format/csa/board.rb', line 35

def parse_from_csa(csa)
  table = []
  cell_pattern = '[+-][A-Z]{2}| \* '
  csa_lines = csa.each_line.to_a
  csa_lines.slice(0, 9).to_enum.with_index do |row, i|
    table_row = []
    row.chomp!
    unless /\AP#{i + 1}(#{cell_pattern}){9}\z/ =~ row
      raise FormatError, "Format Error: line P#{i + 1}"
    end
    row[2..28].scan(/#{cell_pattern}/) do |cell|
      if cell == " * "
        table_row << ""
      else
        table_row << cell
      end
    end
    table << table_row
  end

  captured = []
  csa_lines.slice(9, 2).each do |captured_line|
    captured_line.chomp!
    unless /\AP[+-](00[A-Z]{2})*\z/ =~ captured_line
      raise FormatError, "Invalid format: #{captured_line}"
    end
    turn = captured_line[1]
    captured_line[2..-1].scan(/00([A-Z]{2})/) do |cell|
      captured << turn + cell[0]
    end
  end

  [table, captured]
end

#to_csa ⇒ Object 



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

def to_csa
  csa_rows = ""

  @table.each_with_index do |row, i|
    csa_row = ""
    row.each do |cell|
      if cell == ""
        csa_row << " * "
      else
        csa_row << cell
      end
    end
    csa_rows << "P#{i + 1}#{csa_row}\n"
  end

  sente = "P+"
  gote = "P-"
  @captured.each do |piece|
    if piece[0] == "+"
      sente << "00#{piece[1..2]}"
    else
      gote << "00#{piece[1..2]}"
    end
  end
  csa_rows << "#{sente}\n"
  csa_rows << "#{gote}\n"

  csa_rows
end