Userscript for creation a button "csv" for printing invest events into browser console as a csv (https://www.tinkoff.ru/invest/portfolios/events/)

tinkoff_invert_events_csv.js

// ==UserScript==
// @name         tinkoff_invert_events_csv
// @namespace    http://tampermonkey.net/
// @version      2024-01-04
// @description  Create a button "csv" for printing invest events into browser console as a csv
// @author       swvitaliy
// @match        https://www.tinkoff.ru/invest/portfolios/events/
// @icon         https://www.google.com/s2/favicons?sz=64&domain=tinkoff.ru
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

const csv = (data) => data.map((item) => JSON.stringify(item))
  .join('\n')
	.replace(/(^\[)|(\]$)/mg, '');

function generateCSV() {
    const tables = document.querySelectorAll('table');
    console.assert(tables.length === 1, "should be exctly once table");
    /**
     * @const DOMElement
     */
    const table = tables[0]
    const tbody = table.childNodes[1]
    const rows = tbody.childNodes;
    const ans = []
    let curDate = null;
    for (const row of rows) {
        // console.assert(row.childNodes[0])
        if (!row.childNodes[0])
            continue;

        if (row.childNodes[0].className?.indexOf('operationsDate') >= 0) { // read date
            curDate = row.childNodes[0].innerText;
        } else { // read transaction
            const [time, description] = row.childNodes[0].innerText.split('\n');
            let fullDateTime = curDate + ' ' + time

            let qty = row.childNodes[1].innerText;
            qty = qty.replaceAll('\n', '')

            const cost = row.childNodes[2].innerText.replaceAll('\n', '');
            const currency = cost && cost[cost.length-1]

            ans.push([fullDateTime, description, qty, cost, currency])
        }
    }

    return ans
}

const prevButton = document.querySelector('button[data-qa-file="EventsCalendar"]')

function insertAfter(referenceNode, newNode) {
  referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
}

var csvBtn = document.createElement("button");
csvBtn.innerHTML = "csv";
csvBtn.onclick = function() { console.info(csv(generateCSV())) }
insertAfter(prevButton, csvBtn);

})();