export class Debounce {
    timer = null;
    lastCall = 0;

    constructor(timeout) {
        this.timeout = timeout;
    }

    run(fn) {
        const now = Date.now();
        if (this.timer === null && now - this.lastCall > this.timeout) {
            fn();
            this.lastCall = now;
            return;
        }
        if (this.timer !== null) {
            clearTimeout(this.timer);
            this.timer = null;
        }
        this.timer = setTimeout(() => {
            fn();
            this.lastCall = Date.now();
            this.timer = null;
        }, this.timeout);
    }
}