// The currencies the booth can price in (ISO 4217). Money is always stored as
// integer minor units + one of these codes; the UI offers a closed select rather
// than free text so a typo can never publish an unknown currency.
export const CURRENCIES = ["ALL", "EUR", "USD"] as const;

/** The select options: the known set, plus the current value when it's some
 *  historical code outside it (so an old record still displays + round-trips). */
export function currencyOptions(current: string): string[] {
  const cur = current.trim().toUpperCase();
  return cur && !CURRENCIES.includes(cur as (typeof CURRENCIES)[number]) ? [...CURRENCIES, cur] : [...CURRENCIES];
}