vremel/dist/datetime/isSameWeek.js

JavaScript date utility library for Temporal API

import { assertSameType } from "../assert.js";
import { isPlainDate } from "../type-utils.js";
import { startOfWeek } from "./startOfWeek.js";
function toPlainDate(dt) {
    return isPlainDate(dt) ? dt : dt.toPlainDate();
}
/**
 * Checks whether the two Temporal objects are in the same week.
 *
 * 'same week' is ambiguous and locale-dependent,
 * so `firstDayOfWeek` option is required.
 *
 * This function supports a calendar with a fixed `daysInWeek`,
 * even if the week contains more or less than 7 days.
 * But it doesn't support a calendar which lacks a fixed number of days.
 *
 * @param dt1 first date time object
 * @param dt2 second date time object
 */
export function isSameWeek(dt1, dt2, options) {
    assertSameType(dt1, dt2);
    const firstDayOfWeek = options.firstDayOfWeek;
    if (!Number.isInteger(firstDayOfWeek) ||
        firstDayOfWeek < 1 ||
        firstDayOfWeek > dt1.daysInWeek) {
        throw new Error(`${firstDayOfWeek} isn't a valid day of week`);
    }
    if (dt1.calendarId !== dt2.calendarId) {
        throw new Error(`Calendar mismatch: ${dt1.calendarId} and ${dt2.calendarId}`);
    }
    const pdt1 = toPlainDate(dt1);
    const pdt2 = toPlainDate(dt2);
    return startOfWeek(pdt1, { firstDayOfWeek }).equals(startOfWeek(pdt2, { firstDayOfWeek }));
}
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