273 lines
7.3 KiB
TypeScript
273 lines
7.3 KiB
TypeScript
/** تبدیل و ابزار تقویم شمسی (الگوریتم استاندارد جلالی) */
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export type JalaliDate = { jy: number; jm: number; jd: number };
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const MONTH_NAMES = [
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'فروردین',
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'اردیبهشت',
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'خرداد',
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'تیر',
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'مرداد',
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'شهریور',
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'مهر',
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'آبان',
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'آذر',
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'دی',
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'بهمن',
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'اسفند',
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] as const;
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const WEEKDAY_NAMES = [
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'یکشنبه',
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'دوشنبه',
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'سه‌شنبه',
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'چهارشنبه',
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'پنجشنبه',
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'جمعه',
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'شنبه',
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] as const;
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function div(a: number, b: number) {
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return Math.trunc(a / b);
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}
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export function isLeapJalaliYear(jy: number): boolean {
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const breaks = [
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-61, 9, 38, 199, 426, 686, 756, 818, 1111, 1181, 1210, 1635, 2060, 2097, 2192,
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2262, 2324, 2394, 2456, 3178,
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];
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const bl = breaks.length;
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let jp = breaks[0];
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let jump = 0;
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for (let i = 1; i < bl; i += 1) {
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const jm = breaks[i];
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jump = jm - jp;
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if (jy < jm) break;
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jp = jm;
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}
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let n = jy - jp;
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if (jump - n < 6) n = n - jump + div(jump + 4, 33) * 33;
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let leap = mod(n + 1, 33) - 1;
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if (leap === -1) leap = 32;
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return leap === 0 || leap % 4 === 0;
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}
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function mod(a: number, b: number) {
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return a - Math.trunc(a / b) * b;
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}
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export function jalaliMonthLength(jy: number, jm: number): number {
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if (jm <= 6) return 31;
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if (jm <= 11) return 30;
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return isLeapJalaliYear(jy) ? 30 : 29;
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}
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export function toJalali(gy: number, gm: number, gd: number): JalaliDate {
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const gdm = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
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let gy2 = gm > 2 ? gy + 1 : gy;
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let days =
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355666 +
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365 * gy +
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div(gy2 + 3, 4) -
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div(gy2 + 99, 100) +
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div(gy2 + 399, 400) +
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gd +
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gdm[gm - 1];
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let jy = -1595 + 33 * div(days, 12053);
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days %= 12053;
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jy += 4 * div(days, 1461);
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days %= 1461;
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if (days > 365) {
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jy += div(days - 1, 365);
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days = (days - 1) % 365;
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}
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const jm = days < 186 ? 1 + div(days, 31) : 7 + div(days - 186, 30);
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const jd = 1 + (days < 186 ? days % 31 : (days - 186) % 30);
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return { jy, jm, jd };
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}
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export function toGregorian(jy: number, jm: number, jd: number): {
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gy: number;
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gm: number;
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gd: number;
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} {
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const jy2 = jy + 1595;
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let days =
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-355668 +
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365 * jy2 +
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div(jy2, 33) * 8 +
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div(mod(jy2, 33) + 3, 4) +
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jd +
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(jm < 7 ? (jm - 1) * 31 : (jm - 7) * 30 + 186);
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let gy = 400 * div(days, 146097);
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days %= 146097;
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if (days > 36524) {
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gy += 100 * div(--days, 36524);
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days %= 36524;
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if (days >= 365) days += 1;
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}
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gy += 4 * div(days, 1461);
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days %= 1461;
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if (days > 365) {
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gy += div(days - 1, 365);
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days = (days - 1) % 365;
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}
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const gd = days + 1;
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const salA = [
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0,
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31,
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(gy % 4 === 0 && gy % 100 !== 0) || gy % 400 === 0 ? 29 : 28,
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31,
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30,
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31,
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30,
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31,
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31,
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30,
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31,
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30,
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31,
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];
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let gm = 0;
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let dayAcc = gd;
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for (gm = 1; gm <= 12 && dayAcc > salA[gm]; gm += 1) {
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dayAcc -= salA[gm];
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}
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return { gy, gm, gd: dayAcc };
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}
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export function dateToJalali(d: Date): JalaliDate {
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return toJalali(d.getFullYear(), d.getMonth() + 1, d.getDate());
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}
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export function jalaliToDate(jy: number, jm: number, jd: number): Date {
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const { gy, gm, gd } = toGregorian(jy, jm, jd);
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return new Date(gy, gm - 1, gd);
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}
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export function addJalaliMonths(jy: number, jm: number, delta: number): {
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jy: number;
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jm: number;
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} {
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const idx = jy * 12 + (jm - 1) + delta;
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return {
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jy: Math.floor(idx / 12),
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jm: (idx % 12) + 1,
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};
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}
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export function jalaliMonthName(jm: number): string {
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return MONTH_NAMES[jm - 1] ?? '';
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}
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export function weekdayName(d: Date): string {
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return WEEKDAY_NAMES[d.getDay()] ?? '';
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}
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/** مثل: پنجشنبه ۵ شهریور ۱۴۰۵ */
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export function formatJalaliLong(d: Date): string {
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const { jy, jm, jd } = dateToJalali(d);
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return `${weekdayName(d)} ${toFaDigits(jd)} ${jalaliMonthName(jm)} ${toFaDigits(jy)}`;
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}
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/** مثل: دوشنبه ۲۶ مرداد */
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export function formatJalaliShort(d: Date): string {
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const { jm, jd } = dateToJalali(d);
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return `${weekdayName(d)} ${toFaDigits(jd)} ${jalaliMonthName(jm)}`;
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}
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/** مثل: ۸ شهریور ۱۴۰۵ */
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export function formatJalaliDay(d: Date): string {
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const { jy, jm, jd } = dateToJalali(d);
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return `${toFaDigits(jd)} ${jalaliMonthName(jm)} ${toFaDigits(jy)}`;
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}
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export function toFaDigits(value: number | string): string {
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return String(value).replace(/\d/g, (d) => '۰۱۲۳۴۵۶۷۸۹'[Number(d)]!);
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}
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export function startOfLocalDay(d = new Date()): Date {
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const x = new Date(d);
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x.setHours(0, 0, 0, 0);
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return x;
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}
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export function formatClockFa(d: Date): string {
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const hh = String(d.getHours()).padStart(2, '0');
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const mm = String(d.getMinutes()).padStart(2, '0');
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return `${toFaDigits(hh)}:${toFaDigits(mm)}`;
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}
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/** مثل: ۲۴ مرداد ۱۱:۲۰ */
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export function formatJalaliDayClock(d: Date): string {
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const { jm, jd } = dateToJalali(d);
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return `${toFaDigits(jd)} ${jalaliMonthName(jm)} ${formatClockFa(d)}`;
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}
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export function calendarDaysBetween(from: Date, to: Date): number {
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return Math.round(
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(startOfLocalDay(to).getTime() - startOfLocalDay(from).getTime()) / 86_400_000,
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);
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}
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/** آخرین ارتباط: امروز ۱۶:۳۰ / ۶ روز پیش */
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export function formatRelativeContact(iso: string | null | undefined): string {
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if (!iso) return '—';
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const d = new Date(iso);
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if (Number.isNaN(d.getTime())) return '—';
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const days = calendarDaysBetween(d, new Date());
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if (days <= 0) return `امروز ${formatClockFa(d)}`;
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if (days === 1) return 'دیروز';
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return `${toFaDigits(days)} روز پیش`;
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}
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/** فعالیت بعدی: امروز ۱۶:۳۰ / فردا ۱۰:۰۰ / ۲۴ مرداد ۱۱:۲۰ */
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export function formatNextSlot(iso: string | null | undefined): string {
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if (!iso) return '—';
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const d = new Date(iso);
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if (Number.isNaN(d.getTime())) return '—';
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const days = calendarDaysBetween(new Date(), d);
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if (days === 0) return `امروز ${formatClockFa(d)}`;
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if (days === 1) return `فردا ${formatClockFa(d)}`;
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if (days === -1) return `دیروز ${formatClockFa(d)}`;
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return formatJalaliDayClock(d);
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}
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export function gregorianDayKey(d: Date): string {
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const y = d.getFullYear();
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const m = String(d.getMonth() + 1).padStart(2, '0');
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const day = String(d.getDate()).padStart(2, '0');
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return `${y}-${m}-${day}`;
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}
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export function parseLocalInput(value: string | null | undefined): Date | null {
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if (!value) return null;
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const match = /^(\d{4})-(\d{2})-(\d{2})(?:T(\d{2}):(\d{2}))?/.exec(value);
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if (match) {
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return new Date(
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Number(match[1]),
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Number(match[2]) - 1,
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Number(match[3]),
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match[4] ? Number(match[4]) : 0,
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match[5] ? Number(match[5]) : 0,
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);
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}
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const parsed = new Date(value);
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return Number.isNaN(parsed.getTime()) ? null : parsed;
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}
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export function formatLocalDateInput(d: Date): string {
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return gregorianDayKey(d);
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}
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export function formatLocalDateTimeInput(d: Date): string {
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const pad = (n: number) => String(n).padStart(2, '0');
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return `${gregorianDayKey(d)}T${pad(d.getHours())}:${pad(d.getMinutes())}`;
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}
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/** مثل: ۱۴۰۵/۰۶/۱۲ */
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export function formatJalaliNumeric(d: Date): string {
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const { jy, jm, jd } = dateToJalali(d);
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return `${toFaDigits(jy)}/${toFaDigits(String(jm).padStart(2, '0'))}/${toFaDigits(String(jd).padStart(2, '0'))}`;
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}
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