Function validParts

packages/core/src/prompts/date.ts:65–74

Validate and return calendar parts, or undefined if invalid

(parts: DateParts)

/** Validate and return calendar parts, or undefined if invalid */
function validParts(parts: DateParts): { year: number; month: number; day: number } | undefined {
	const { year, month, day } = parse(parts);
	if (!year || year < 0 || year > 9999) return undefined;
	if (!month || month < 1 || month > 12) return undefined;
	if (!day || day < 1) return undefined;
	const d = new Date(Date.UTC(year, month - 1, day));
	if (d.getUTCFullYear() !== year || d.getUTCMonth() !== month - 1 || d.getUTCDate() !== day)
		return undefined;
	return { year, month, day };
}

function toDate(parts: DateParts): Date | undefined {
	const p = validParts(parts);