pos/server/src/lib/pagination.ts

export interface PageParams {
  page: number;
  limit: number;
  skip: number;
}

export function parsePage(query: Record<string, unknown>): PageParams {
  const page = Math.max(1, parseInt(String(query.page ?? "1"), 10) || 1);
  const limit = Math.min(100, Math.max(1, parseInt(String(query.limit ?? "20"), 10) || 20));
  return { page, limit, skip: (page - 1) * limit };
}

export function paginatedResponse<T>(
  data: T[],
  total: number,
  { page, limit }: PageParams
) {
  return {
    data,
    pagination: {
      page,
      limit,
      total,
      totalPages: Math.ceil(total / limit),
    },
  };
}