TypeScript Internship

// Week 8: runtime validation that produces the static type
const Order = z.object({
  id:        z.string().uuid(),
  status:    z.enum(["pending", "paid", "shipped"]),
  total:     z.number().positive(),
  placedAt:  z.coerce.date(),
});

export type Order = z.infer<typeof Order>;   // one source of truth

export async function getOrder(id: string): Promise<Order> {
  const res = await fetch(`/api/orders/${id}`);
  if (!res.ok) throw new ApiError(res.status);
  return Order.parse(await res.json());   // validated, not asserted
}