internet-programming/lab3/node_modules/json-server/lib/server/utils.js

26 lines
524 B
JavaScript

"use strict";
module.exports = {
getPage
};
function getPage(array, page, perPage) {
const obj = {};
const start = (page - 1) * perPage;
const end = page * perPage;
obj.items = array.slice(start, end);
if (obj.items.length === 0) {
return obj;
}
if (page > 1) {
obj.prev = page - 1;
}
if (end < array.length) {
obj.next = page + 1;
}
if (obj.items.length !== array.length) {
obj.current = page;
obj.first = 1;
obj.last = Math.ceil(array.length / perPage);
}
return obj;
}