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class TicTacToe {
constructor(playerX = 'x', playerO = 'o') {
this.playerX = playerX
this.playerO = playerO
this._currentTurn = false
this._x = 0
this._o = 0
this.turns = 0
}
get board() {
return this._x | this._o
}
get currentTurn() {
return this._currentTurn ? this.playerO : this.playerX
}
get enemyTurn() {
return this._currentTurn ? this.playerX : this.playerO
}
static check(state) {
for (let combo of [7, 56, 73, 84, 146, 273, 292, 448])
if ((state & combo) === combo)
return !0
return !1
}
/**
* ```js
* TicTacToe.toBinary(1, 2) // 0b010000000
* ```
*/
static toBinary(x = 0, y = 0) {
if (x < 0 || x > 2 || y < 0 || y > 2) throw new Error('invalid position')
return 1 << x + (3 * y)
}
/**
* @param player `0` is `X`, `1` is `O`
*
* - `-3` `Game Ended`
* - `-2` `Invalid`
* - `-1` `Invalid Position`
* - ` 0` `Position Occupied`
* - ` 1` `Sucess`
* @returns {-3|-2|-1|0|1}
*/
turn(player = 0, x = 0, y) {
if (this.board === 511) return -3
let pos = 0
if (y == null) {
if (x < 0 || x > 8) return -1
pos = 1 << x
} else {
if (x < 0 || x > 2 || y < 0 || y > 2) return -1
pos = TicTacToe.toBinary(x, y)
}
if (this._currentTurn ^ player) return -2
if (this.board & pos) return 0
this[this._currentTurn ? '_o' : '_x'] |= pos
this._currentTurn = !this._currentTurn
this.turns++
return 1
}
/**
* @returns {('X'|'O'|1|2|3|4|5|6|7|8|9)[]}
*/
static render(boardX = 0, boardO = 0) {
let x = parseInt(boardX.toString(2), 4)
let y = parseInt(boardO.toString(2), 4) * 2
return [...(x + y).toString(4).padStart(9, '0')].reverse().map((value, index) => value == 1 ? 'X' : value == 2 ? 'O' : ++index)
}
/**
* @returns {('X'|'O'|1|2|3|4|5|6|7|8|9)[]}
*/
render() {
return TicTacToe.render(this._x, this._o)
}
get winner() {
let x = TicTacToe.check(this._x)
let o = TicTacToe.check(this._o)
return x ? this.playerX : o ? this.playerO : false
}
}
new TicTacToe().turn
module.exports = TicTacToe |