Function dateGetter

packages/common/src/i18n/format_date.ts:319–343

* Returns a date formatter that transforms a date into its locale digit representation

(
  name: DateType,
  size: number,
  offset: number = 0,
  trim = false,
  negWrap = false,
)

 * Returns a date formatter that transforms a date into its locale digit representation
 */
function dateGetter(
  name: DateType,
  size: number,
  offset: number = 0,
  trim = false,
  negWrap = false,
): DateFormatter {
  return function (date: Date, locale: string): string {
    let part = getDatePart(name, date);
    if (offset > 0 || part > -offset) {
      part += offset;
    }

    if (name === DateType.Hours) {
      if (part === 0 && offset === -12) {
        part = 12;
      }
    } else if (name === DateType.FractionalSeconds) {
      return formatFractionalSeconds(part, size);
    }

    const localeMinus = getLocaleNumberSymbol(locale, NumberSymbol.MinusSign);
    return padNumber(part, size, localeMinus, trim, negWrap);
  };
}

function getDatePart(part: DateType, date: Date): number {
  switch (part) {