86 lines
3.1 KiB
TypeScript
86 lines
3.1 KiB
TypeScript
//ensures the week starts from sunday
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export function weekStartSunday(date_local: Date): Date {
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const start = new Date(Date.UTC(date_local.getFullYear(), date_local.getMonth(), date_local.getDate()));
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const dow = start.getDay(); // 0 = dimanche
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start.setDate(start.getDate() - dow);
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start.setHours(0, 0, 0, 0);
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return start;
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}
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//converts string to HHmm format
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export const toStringFromHHmm = (date: Date): string => {
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const hh = date.getUTCHours().toString().padStart(2, '0');
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const mm = date.getUTCMinutes().toString().padStart(2, '0');
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return `${hh}:${mm}`;
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}
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//converts string to Date format
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export const toStringFromDate = (date: Date) =>
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date.toISOString().slice(0,10);
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//converts HHmm format to string
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export const toHHmmFromString = (hhmm: string): Date => {
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const [hh, mm] = hhmm.split(':').map(Number);
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const date = new Date('1970-01-01T00:00:00.000Z');
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date.setUTCHours(hh, mm, 0, 0);
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return new Date(date);
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}
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//converts string to HHmm format
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export const toHHmmFromDate = (input: Date | string): string => {
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const date = new Date(input);
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const hh = String(date.getUTCHours()).padStart(2, '0');
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const mm = String(date.getUTCMinutes()).padStart(2, '0');
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return `${hh}:${mm}`;
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}
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//converts Date format to string
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export const toDateFromString = (ymd: string | Date): Date => {
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return new Date(`${ymd}T00:00:00:000Z`);
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}
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export const toUTCDateFromString = (iso: string | Date) => {
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const d = typeof iso === 'string' ? new Date(iso + 'T00:00:00.000Z') : iso;
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return new Date(Date.UTC(d.getUTCFullYear(), d.getUTCMonth(), d.getUTCDate()));
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};
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export const sevenDaysFrom = (date: Date | string): Date[] => {
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return Array.from({length: 7 }, (_,i) => {
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const d = new Date(date);
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d.setUTCDate(d.getUTCDate() + i );
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return d;
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});
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}
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export function payYearOfDate(date: string | Date, anchorISO = ANCHOR_ISO): number {
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const ANCHOR = toUTCDateFromString(anchorISO);
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const d = toUTCDateFromString(date);
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const days = Math.floor((+d - +ANCHOR) / MS_PER_DAY);
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const cycles = Math.floor(days / (PERIODS_PER_YEAR * PERIOD_DAYS));
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return ANCHOR.getUTCFullYear() + 1 + cycles;
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}
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//compute labels for periods
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export function computePeriod(pay_year: number, period_no: number, anchorISO = ANCHOR_ISO) {
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const ANCHOR = toUTCDateFromString(anchorISO);
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const cycles = pay_year - (ANCHOR.getUTCFullYear() + 1);
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const offsetPeriods = cycles * PERIODS_PER_YEAR + (period_no - 1);
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const start = new Date(+ANCHOR + offsetPeriods * PERIOD_DAYS * MS_PER_DAY);
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const end = new Date(+start + (PERIOD_DAYS - 1) * MS_PER_DAY);
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const pay = new Date(end.getTime() + 6 * MS_PER_DAY);
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return {
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period_no: period_no,
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pay_year: pay_year,
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payday: toStringFromDate(pay),
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period_start: toStringFromDate(start),
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period_end: toStringFromDate(end),
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label: `${toStringFromDate(start)}.${toStringFromDate(end)}`,
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start, end,
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};
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}
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//list of all 26 periods for a full year
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export function listPayYear(pay_year: number, anchorISO = ANCHOR_ISO) {
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return Array.from({ length: PERIODS_PER_YEAR }, (_, i) => computePeriod(pay_year, i + 1, anchorISO));
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} |