@burglekitt/gmt/dist/unix/parse/parseDateFromUnix.js

Temporal-based date and time utilities with timezone support and polyfill integration

import { Temporal } from "@js-temporal/polyfill";
import { getSystemTimeZone } from "../../zoned/get/index.js";
import { convertUnixToZoned } from "../convert/index.js";
import { isValidUnixMilliseconds, isValidUnixSeconds, } from "../validate/index.js";
/**
 * Extract the date portion from a unix epoch value.
 *
 * - Converts to ZonedDateTime then extracts the PlainDate.
 * - Uses system timezone if not specified.
 * - Returns "" for invalid input.
 *
 * @param value unix epoch in milliseconds or seconds (number)
 * @param options optional: epochUnit ("seconds" | "milliseconds"), timeZone (IANA)
 * @returns ISO date string (e.g., "2024-03-17") or "" on invalid input
 *
 * @example parseDateFromUnix(1700000000000) // "2023-11-15"
 * @example parseDateFromUnix(1700000000, { epochUnit: "seconds" }) // "2023-11-15"
 * @example parseDateFromUnix(-86400, { epochUnit: "seconds" }) // "1969-12-31"
 */
export function parseDateFromUnix(value, options) {
    const epochUnit = options?.epochUnit ?? "milliseconds";
    if (epochUnit === "seconds") {
        if (!isValidUnixSeconds(value))
            return "";
    }
    else {
        if (!isValidUnixMilliseconds(value))
            return "";
    }
    const timeZone = options?.timeZone ?? getSystemTimeZone();
    if (!timeZone)
        return "";
    const zoned = epochUnit
        ? convertUnixToZoned(value, timeZone, epochUnit)
        : convertUnixToZoned(value, timeZone);
    if (!zoned)
        return "";
    try {
        const zdt = Temporal.ZonedDateTime.from(zoned);
        return zdt.toPlainDate().toString();
    }
    catch {
        return "";
    }
}