You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
|
|
const { ValidationError } = require('../error');
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* @param {import('mongodb').Cursor} cursor
|
|
|
|
|
* @param {number} page
|
|
|
|
|
* @param {number} pageSize
|
|
|
|
|
* @returns {Promise<Array[]>} pageDocs numPages count
|
|
|
|
|
*/
|
|
|
|
|
async function paginate(cursor, page, pageSize) {
|
|
|
|
|
if (page <= 0) throw new ValidationError('page');
|
|
|
|
|
const [count, pageDocs] = await Promise.all([
|
|
|
|
|
cursor.count(),
|
|
|
|
|
cursor.skip((page - 1) * pageSize).limit(pageSize).toArray(),
|
|
|
|
|
]);
|
|
|
|
|
const numPages = Math.floor((count + pageSize - 1) / pageSize);
|
|
|
|
|
return [pageDocs, numPages, count];
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
global.Hydro.lib.paginate = module.exports = paginate;
|
