MongoDB Node driver Pagination

paginateMongoRequest.js

export const paginateMongoRequest = async (collection, params = {}) => {
  const defaults = {
    page: 1,
    perPage: 18,
    sort: undefined,
    filter: undefined,
  };

  const { page, perPage, sort, filter } = Object.assign(defaults, params);

  const totalCount = await collection.countDocuments(filter);
  const totalPages = Math.ceil(totalCount / perPage);

  const items = await collection
    .find(filter)
    .sort(sort)
    .limit(perPage)
    .skip(perPage * (page - 1))
    .toArray();

  return {
    page,
    items,
    totalPages,
  };
};

// Usage example:
// import { MongoClient } from 'mongodb';
// import { paginateMongoRequest } from './paginateMongoRequest.js';

// const client = new MongoClient(MONGO_URL);
// const db = client.db(DB_NAME);
// await client.connect();
// const documentsCollection = db.collection('documents');

// const getAllDocuments = async (params) => {
//   const page = params?.page ?? 1;

//   const result = await paginateMongoRequest(documentsCollection, {
//     page,
//     sort: { createdAt: -1 }, // newest first
//     filter: {
//       email: {
//         $ea: '[email protected]' // get all documents with email === [email protected]
//       },
//     },
//   });

//   return result; // will return { items: [...], page: 1, totalPages: 123,  }
// };