対人対戦できるオセロ

vs_human_othello.rb

# -*- coding: utf-8 -*-

#定数の定義
MAX_TURN = 60 #最大ターン数
BOARD_SIZE = 8 #盤のサイズ(8*8)
EMPTY = 0 #空きマス
BLACK = 1 #黒石のマス
WHITE = -1 #白石のマス
WALL = 2 #番兵(ひっくり返すときに使う)

ROW_NUM = {"a" => 1, "b" => 2, "c" => 3, "d" => 4, "e" => 5, "f" => 6, "g" => 7, "h" => 8} #列番号
COL_NUM = {"1" => 1, "2" => 2, "3" => 3, "4" => 4, "5" => 5, "6" => 6, "7" => 7, "8" => 8} #行番号
COLOR = {BLACK => "黒", WHITE => "白"} #色

#ひっくり返せる方向
UPPER_LEFT = 1
UPPER = 2
UPPER_RIGHT = 3
RIGHT = 4
LOWER_RIGHT = 5
LOWER = 6
LOWER_LEFT = 7
LEFT = 8

#新しい盤の作成
def new_board
  #盤面を表す二重配列の作成
  @board = Array.new(BOARD_SIZE+2){Array.new(BOARD_SIZE+2,EMPTY)}
  #壁の配置
  @board[0].fill(WALL)
  @board[9].fill(WALL)
  @board.each do |col|
    col[0] = WALL
    col[9] = WALL
  end
  #石の初期配置
  @board[4][4] = WHITE
  @board[5][5] = WHITE
  @board[5][4] = BLACK
  @board[4][5] = BLACK
end

#現在の盤の状態を表示
def show_board
  print("\n\n  #{ROW_NUM.keys.join(" ")}\n") #列番号の表示
  @board.slice(1...-1).each_with_index do |col, i|
    print(COL_NUM[(i+1).to_s]) #行番号の表示
    col.each do |row| #マスの表示
      case row
      when EMPTY
        print "\e[32m"
        print(" □")
        print "\e[0m"
      when BLACK
        print(" ○")
      when WHITE
        print(" ●")
      end
    end
    print("\n")
  end
  print("\n")
end

#ゲームの進行
def start_game
  new_board
  show_board
  @turn = 0
  @pass_count = 0
  @stone_color = BLACK #黒石からスタート
  while true
    print("#{COLOR[@stone_color]}の手番です\n")
    put_stone
    show_board
    stone_count = count
    print("\n 黒:#{count[0]}, 白:#{count[1]}\n\n")
    #ゲームの終了
    if @turn == MAX_TURN
      break
    end
    if @pass_count == 2
      break
    end
  end
  judge
end

def turnable_direction(col, row) #返せるかどうかの判定とその方向の取得
  direction = []
  #左上
  if @board[col-1][row-1] == -@stone_color #相手の色がある場合
    i = 2
    while @board[col-i][row-i] == -@stone_color #相手の色が続くまで
      i += 1
    end
    if @board[col-i][row-i] == @stone_color #相手の色に続くのが自分の色の場合
      direction.push(UPPER_LEFT)
    end
  end
  if @board[col-1][row] == -@stone_color #上
    i = 2
    while @board[col-i][row] == -@stone_color
      i += 1
    end
    if @board[col-i][row] == @stone_color
      direction.push(UPPER)
    end
  end
  if @board[col-1][row+1] == -@stone_color #右上
    i = 2
    while @board[col-i][row+i] == -@stone_color
      i += 1
    end
    if @board[col-i][row+i] == @stone_color
      direction.push(UPPER_RIGHT)
    end
  end
  if @board[col][row+1] == -@stone_color #右
    i = 2
    while @board[col][row+i] == -@stone_color
      i += 1
    end
    if @board[col][row+i] == @stone_color
      direction.push(RIGHT)
    end
  end
  if @board[col+1][row+1] == -@stone_color #右下
    i = 2
    while @board[col+i][row+i] == -@stone_color
      i += 1
    end
    if @board[col+i][row+i] == @stone_color
      direction.push(LOWER_RIGHT)
    end
  end
  if @board[col+1][row] == -@stone_color #下
    i = 2
    while @board[col+i][row] == -@stone_color
      i += 1
    end
    if @board[col+i][row] == @stone_color
      direction.push(LOWER)
    end
  end
  if @board[col+1][row-1] == -@stone_color #左下
    i = 2
    while @board[col+i][row-i] == -@stone_color
      i += 1
    end
    if @board[col+i][row-i] == @stone_color
      direction.push(LOWER_LEFT)
    end
  end
  if @board[col][row-1] == -@stone_color #左
    i = 2
    while @board[col][row-i] == -@stone_color
      i += 1
    end
    if @board[col][row-i] == @stone_color
      direction.push(LEFT)
    end
  end
  return direction
end

#石を置くことができるマスの取得
def get_turnable_cells
  turnable_cells = []
  @board.each_with_index do |col, i|
    col.each_with_index do |row, j|
      if row == EMPTY #空きマス
        turnable_direction = turnable_direction(i,j) #返せる方向の取得
        if turnable_direction.size != 0 #ひっくり返せる方向が存在する=石を置けるマス
          turnable_cells.push([i,j]) #座標を格納
        end
      end
    end
  end
  return turnable_cells
end

#石を置く
def put_stone
  turnable_cells = get_turnable_cells #石を置くことができるマスの一覧の取得
  cell_list = "" #石を置くことができるマスの一覧の作成
  turnable_cells.each do |val|
    cell_list += "(" + ROW_NUM.key(val[1]) + COL_NUM.key(val[0]) + ")"
  end
  if turnable_cells.size == 0
    print("パスしました\n\n")
    @pass_count += 1
    @stone_color = -@stone_color
  else
    print("#{@turn+1}手目: ")
    move = gets.chomp!
    if move =~ /[a-h][1-8]/
      cell = move.split("")
      col = COL_NUM[cell[1]]
      row = ROW_NUM[cell[0]]
      cell = [col, row]
      if turnable_cells.include?(cell) #指定されたマスが置くことができるマスの時
        @board[col][row] = @stone_color
        reverse_stone(col, row)
        @stone_color = -@stone_color
        @turn += 1
        @pass_count = 0
      else
        print("そのマスには打つことはできません\n")
        print("打てるマスは#{cell_list}です\n")
        put_stone
      end
    else
      print("正しいマスを指定してください\n")
      put_stone
    end
  end
end

#石をひっくり返す
def reverse_stone(col, row) #石をおいた位置
  turn_direction = turnable_direction(col, row) #方向と数を取得
  turn_direction.each do |direction|
    case direction
    when UPPER_LEFT
      i = 1
      while @board[col-i][row-i] == -@stone_color #相手の色が続くまで
        @board[col-i][row-i] = @stone_color
        i += 1
      end
    when UPPER
      i = 1
      while @board[col-i][row] == -@stone_color
        @board[col-i][row] = @stone_color
        i += 1
      end
    when UPPER_RIGHT
      i = 1
      while @board[col-i][row+i] == -@stone_color
        @board[col-i][row+i] = @stone_color
        i += 1
      end
    when RIGHT
      i = 1
      while @board[col][row+i] == -@stone_color
        @board[col][row+i] = @stone_color
        i += 1
      end
    when LOWER_RIGHT
      i = 1
      while @board[col+i][row+i] == -@stone_color
        @board[col+i][row+i] = @stone_color
        i += 1
      end
    when LOWER
      i = 1
      while @board[col+i][row] == -@stone_color
        @board[col+i][row] = @stone_color
        i += 1
      end
    when LOWER_LEFT
      i = 1
      while @board[col+i][row-i] == -@stone_color
        @board[col+i][row-i] = @stone_color
        i += 1
      end
    when LEFT
      i = 1
      while @board[col][row-i] == -@stone_color
        @board[col][row-i] = @stone_color
        i += 1
      end
    end
  end
end

#石の数を数える
def count
  black = 0
  white = 0
  @board.each do |col|
    col.each do |row|
      case row
      when BLACK
        black += 1
      when WHITE
        white += 1
      end
    end
  end
  count = [black, white]
  return count
end

#勝敗の判定
def judge
  stone_count = count
  black = count[0]
  white = count[1]
  if black > white
    print("\n黒:#{black} 対 白:#{white} で黒の勝ち\n\n")
  elsif white > black
    print("\n黒:#{black} 対 白:#{white} で白の勝ち\n\n")
  else
    print("\n黒:#{black} 対 白:#{white} で引き分け\n\n")
  end
end

start_game