@burglekitt/gmt/dist/plain/calculate/maxTime.js

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

import { Temporal } from "@js-temporal/polyfill";
import { isValidTime } from "../validate/index.js";
/**
 * Return the latest (maximum) of the given PlainTime values.
 *
 * - Returns null if the array is empty or contains no valid times.
 * - Validation is performed on each item in the array.
 *
 * @param times Array of ISO PlainTime strings (e.g. "14:30:00")
 * @returns The latest time string, or null on invalid input
 *
 * @example maxTime(["14:30:00", "09:00:00", "20:45:00"]) // "20:45:00"
 * @example maxTime([]) // null
 */
export function maxTime(times) {
    if (!times.length)
        return null;
    const valid = times.filter(isValidTime);
    if (!valid.length)
        return null;
    try {
        const max = valid.reduce((currentMax, candidateStr) => {
            const candidate = Temporal.PlainTime.from(candidateStr);
            return Temporal.PlainTime.compare(candidate, currentMax) > 0
                ? candidate
                : currentMax;
        }, Temporal.PlainTime.from(valid[0]));
        return max.toString();
    }
    catch {
        return null;
    }
}