cal.pub0.org/lib/helpers/withPagination.ts

import { NextMiddleware } from "next-api-middleware";
import z from "zod";

const withPage = z.object({
  pageNumber: z
    .string()
    .min(1)
    .default("1")
    .transform((n) => parseInt(n)),
  take: z
    .string()
    .min(10)
    .max(100)
    .default("10")
    .transform((n) => parseInt(n)),
});

export const withPagination: NextMiddleware = async (req, _, next) => {
  const { pageNumber, take } = withPage.parse(req.query);
  const skip = pageNumber * take;
  req.pagination = {
    take: take || 10,
    skip: skip || 0,
  };
  await next();
};