date-vir/dist/date-operations/combine-dates.js

Easy and explicit dates and times.

import { checkValidShape } from 'object-shape-tester';
import { datePartShape, timePartShape, } from '../full-date/full-date-shape.js';
/**
 * Combine two parts of a {@link FullDate} objects into a filled-in {@link FullDate}. Note that the
 * timezones must match for both inputs. If two complete {@link FullDate} objects are passed in, only
 * the respective parts of each is used.
 *
 * @category Util
 */
export function combineDateParts(maybeDateParts) {
    const timePart = checkValidShape(maybeDateParts.time, timePartShape, {
        allowExtraKeys: true,
    })
        ? {
            hour: maybeDateParts.time.hour,
            minute: maybeDateParts.time.minute,
            second: maybeDateParts.time.second,
            millisecond: maybeDateParts.time.millisecond,
            timezone: maybeDateParts.time.timezone,
        }
        : undefined;
    const datePart = checkValidShape(maybeDateParts.date, datePartShape, {
        allowExtraKeys: true,
    })
        ? {
            year: maybeDateParts.date.year,
            month: maybeDateParts.date.month,
            day: maybeDateParts.date.day,
            timezone: maybeDateParts.date.timezone,
        }
        : undefined;
    if (timePart && datePart) {
        if (timePart.timezone !== datePart.timezone) {
            throw new Error(`Time and date parts have mismatching timezones. Got '${timePart.timezone}' and '${datePart.timezone}'.`);
        }
        return {
            ...timePart,
            ...datePart,
        };
    }
    if (timePart) {
        return timePart;
    }
    if (datePart) {
        return datePart;
    }
    return undefined;
}