Kirubel-Kibru-Yaltopia
89440985f1
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62 lines
1.7 KiB
TypeScript
62 lines
1.7 KiB
TypeScript
export function startOfMonth(d: Date) {
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return new Date(d.getFullYear(), d.getMonth(), 1);
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}
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export function endOfMonth(d: Date) {
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return new Date(d.getFullYear(), d.getMonth() + 1, 0, 23, 59, 59, 999);
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}
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export function addMonths(d: Date, n: number) {
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return new Date(d.getFullYear(), d.getMonth() + n, 1);
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}
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export function sameDay(a: Date, b: Date) {
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return (
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a.getFullYear() === b.getFullYear() &&
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a.getMonth() === b.getMonth() &&
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a.getDate() === b.getDate()
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);
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}
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export function toDateKey(d: Date) {
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return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, "0")}-${String(d.getDate()).padStart(2, "0")}`;
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}
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export function parseDateKey(key: string) {
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const [y, m, day] = key.split("-").map(Number);
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return new Date(y, m - 1, day);
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}
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/** Monday-first calendar grid cells (includes leading/trailing days). */
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export function buildMonthGrid(month: Date): Date[] {
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const start = startOfMonth(month);
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const end = endOfMonth(month);
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const startPad = (start.getDay() + 6) % 7;
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const cells: Date[] = [];
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const gridStart = new Date(start);
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gridStart.setDate(start.getDate() - startPad);
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for (let i = 0; i < 42; i++) {
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const cell = new Date(gridStart);
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cell.setDate(gridStart.getDate() + i);
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cells.push(cell);
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if (i >= 27 && cell >= end && cell.getDay() === 0) break;
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}
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return cells;
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}
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export function formatMonthYear(d: Date) {
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return d.toLocaleDateString("en-US", { month: "long", year: "numeric" });
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}
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export function matchDisplayDate(iso: string | null) {
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if (!iso) return "TBD";
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return new Date(iso).toLocaleString(undefined, {
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weekday: "short",
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month: "short",
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day: "numeric",
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hour: "2-digit",
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minute: "2-digit",
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});
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}
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