/**
 * Pricing helpers untuk trip. Single source of truth — semua gate "trip gratis"
 * harus lewat sini, jangan compare `price === 0` inline.
 */

export function isFreeTrip(trip: { price: number }): boolean {
  return trip.price <= 0;
}

export function isPaidTrip(trip: { price: number }): boolean {
  return !isFreeTrip(trip);
}