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import {pad0} from "./text.ts";
/*** UNIX time in seconds.* If no args will be current time.* Note that in seconds not milliseconds.* @example* ```ts* const time = utEncode();* const date = utDecode(time);* ```*/export function utEncode(date?:Date):number{    return Math.floor((date ?? new Date()).getTime() / 1000);}
/*** `Date` from UNIX time.* Note that in seconds not milliseconds.* @example* ```ts* const time = utEncode();* const date = utDecode(time);* ```*/export function utDecode(time:number):Date{    return new Date(time * 1000);}
/*** Convert from formatted datetime string such as ISO8601 to UNIX time in seconds.* @example* ```ts* const time = utParse("2023-05-18T08:31:32.292Z");* ```*/export function utParse(ds:string):number{    const [y, m, d, h, mi, s] = ds.split(/[/ :TZ_.-]/i).map(v => Number(v));
    return utEncode(new Date(y, (m ?? 1) - 1, d ?? 1, h ?? 0, mi ?? 0, s ?? 0));}
/*** Wait for specified time.* Return actual elapsed wait time.* @example* ```ts* await delay(1000);* ```*/export async function delay(time:number):Promise<number>{    const t0 = performance.now();    await new Promise<void>(done => setTimeout(done, time));    const t1 = performance.now();
    return Math.ceil(t1 - t0);}
/*** Generate serialized string from current or any `Date` to "yyyyMMddhhmmss".* @example* ```ts* const format = dtSerial();* ```*/export function dtSerial(date?:Date, split?:boolean):string{    const d = date ?? new Date();    const ss = split ? "/" : "";    const sc = split ? ":" : "";
    return `${d.getFullYear()}${ss}${pad0(d.getMonth() + 1)}${ss}${pad0(d.getDate())}${split ? " " : ""}${pad0(d.getHours())}${sc}${pad0(d.getMinutes())}${sc}${pad0(d.getSeconds())}`;}