export function paginate(total: number, page: number, limit: number) {
  return {
    total,
    page,
    limit,
    pages: Math.ceil(total / limit),
    hasNext: page * limit < total,
    hasPrev: page > 1
  };
}

export function sleep(ms: number): Promise<void> {
  return new Promise(resolve => setTimeout(resolve, ms));
}

export function pick<T extends object, K extends keyof T>(obj: T, keys: K[]): Pick<T, K> {
  return Object.fromEntries(keys.map(k => [k, obj[k]])) as Pick<T, K>;
}

export function omit<T extends object, K extends keyof T>(obj: T, keys: K[]): Omit<T, K> {
  const keysSet = new Set<PropertyKey>(keys);
  return Object.fromEntries(
    Object.entries(obj).filter(([k]) => !keysSet.has(k))
  ) as Omit<T, K>;
}