gomoku.rb

#!/usr/bin/env ruby

class Gomoku
  STONES = %w(1 0)

  def initialize(row: 19, col: 19, connectivity: 5)
    @row = row
    @col = col
    @connectivity = connectivity
    @stones = STONES.dup

    reset
    print_boards
    hello
    run
  end

  def reset
    @boards1 = [] # 横判定用
    @boards2 = [] # 縦判定用
    @boards3 = [] # 右肩上がり斜め判定用
    @boards4 = [] # 右肩下がり斜め判定用

    @col.times do |c|
      @row.times do |r|
        @boards1 << Array.new(@col, '-')
        @boards2 << Array.new(@col, '-')
        @boards3 << Array.new(@col, '-')
        @boards4 << Array.new(@col, '-')
      end
    end
  end

  def print_boards
    @col.times do |c|
      @row.times do |r|
        print @boards1[c][r]
      end
      print "\n"
    end
  end

  def hello
    puts '五目並べへヨウコソ'
    puts "#{STONES.join('と')}を交互に並べてタテ・ヨコ・ナナメに先に#{@connectivity}並べた方の勝ちです"
  end

  def current_stone
    @stones.first
  end

  def run
    puts "#{current_stone} を置く場所を入力して下さい(例: 0, 1)"
    inputs = gets
    x, y = inputs.split(',')
    set_to_board(x.to_i, y.to_i)
  end

  def rotate_stones
    @stones << @stones.shift
  end

  def set_to_board(x, y)
    if @boards1[x][y] == '-'
      @boards1[x][y] = current_stone
      @boards2[y][x] = current_stone
      @boards3[x-y][y] = current_stone
      @boards4[x+y][y] = current_stone

      rotate_stones
    else
      puts "すでに石が置かれていますよ！"
    end

    print_boards
    if judge
    else
      run
    end
  end

  def judge
    [@boards1, @boards2, @boards3, @boards4].each do |boards|
      boards.each do |col|
        STONES.each do |stone|
          if col.join('').match /#{stone}{#{@connectivity}}/
            puts "#{stone}の勝ちです"
            return true
          end
        end
      end
    end

    false
  end
end

Gomoku.new(row: 19, col: 19)