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| class ChessClock {
static WHITE = 0;
static BLACK = 1;
constructor(time, increment, on_update) {
this.times = [0, 0];
this.settings = {
time: time || 0,
intervalTime: 10,
increment: increment || 0,
};
this.turn = ChessClock.WHITE;
this.interval = null;
this.on_update = on_update;
this.reset();
}
static formatTime(timestamp) {
let min = (timestamp / 1000 / 60) << 0;
let sec = ((timestamp / 1000) % 60) << 0;
return min + ':' + ('0' + sec).slice(-2);
}
updateTime () {
this.times[this.turn] = this.times[this.turn] - this.settings.intervalTime;
if (this.times[this.turn] <= 0) {
this.pause();
}
this.update();
}
start() {
if ( this.interval) {
return;
}
this.interval = setInterval(this.updateTime.bind(this), this.settings.intervalTime);
}
pause() {
if (! this.interval) {
return;
}
clearInterval(this.interval);
this.interval = null;
}
paused() {
return this.interval === null;
}
move() {
this.times[this.turn] = this.times[this.turn] + this.settings.increment;
this.turn = !this.turn * 1;
this.update();
}
update() {
this.on_update && this.on_update(
ChessClock.formatTime(this.times[ChessClock.WHITE]),
ChessClock.formatTime(this.times[ChessClock.BLACK]),
);
}
reset() {
this.times[ChessClock.WHITE] = this.settings.time;
this.times[ChessClock.BLACK] = this.settings.time;
this.turn = ChessClock.WHITE;
this.update();
}
isWhiteTurn() {
return ChessClock.WHITE === this.turn;
}
isBlackTurn = function () {
return ChessClock.BLACK === this.turn;
}
}
document.addEventListener('DOMContentLoaded', () => {
const white_field = document.getElementById('white-field');
const black_field = document.getElementById('black-field');
const white_timer = document.getElementById('white-time');
const black_timer = document.getElementById('black-time');
const play_button = document.getElementById('play');
const clock = new ChessClock(1 * 60 * 1000, 0, (white, black) => {
white_timer.innerHTML = white;
black_timer.innerHTML = black;
});
play_button.addEventListener('click', (e) => {
e.preventDefault();
play_button.classList.toggle('pause');
black_field.classList.remove('active');
white_field.classList.remove('active');
if (clock.paused()) {
white_field.classList.add('active');
clock.reset();
clock.start();
} else {
clock.pause();
}
});
white_field.addEventListener('click', (e) => {
e.preventDefault();
if (!clock.paused() && clock.isWhiteTurn()) {
white_field.classList.remove('active');
black_field.classList.add('active');
clock.move();
}
});
black_field.addEventListener('click', (e) => {
e.preventDefault();
if (!clock.paused() && clock.isBlackTurn()) {
black_field.classList.remove('active');
white_field.classList.add('active');
clock.move();
}
});
play_button.click();
}); |
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