TamperMonker UserScript to Export Amazon Transactions

amzn-txn-export-csv.user.js

// ==UserScript==
// @name         Amazon Transaction Export to CSV
// @namespace    http://www.danielhall.me/
// @version      0.4
// @description  Adds a link to Amazon to export transactions as a CSV for import into YNAB
// @updateURL    https://gist.github.com/smarthall/5b01a396ff30921625b1ac7175842d10/raw/amzn-txn-export-csv.user.js
// @downloadURL  https://gist.github.com/smarthall/5b01a396ff30921625b1ac7175842d10/raw/amzn-txn-export-csv.user.js
// @author       Daniel Hall <userscripts@danielhall.me>
// @match        https://www.amazon.com.au/cpe/yourpayments/transactions
// @icon         https://www.google.com/s2/favicons?sz=64&domain=amazon.com.au
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var csv = "Date,Payee,Memo,Amount\n"
    const transactionElements = document.querySelector('form.a-spacing-none').getElementsByClassName('apx-transaction-date-container');

    for (const d of transactionElements) {
        const date = new Date(d.firstChild.innerText);
        const dateString = date.getFullYear() + '-' + (date.getMonth() + 1) + '-' + date.getDate();
        const txnContainers = d.nextSibling.querySelectorAll('div.apx-transactions-line-item-component-container');

        for (const t of txnContainers) {
            const id = t.querySelector('a.a-link-normal').innerText;
            const price = t.querySelector('div.a-text-right.a-span-last').firstChild.innerText.replace('$', '');
            csv += dateString + ",Amazon,\"" + id + "\"," + price + "\n";
        }
    }

    const heading = document.querySelector('h1.a-spacing-small.a-text-bold');

    const element = document.createElement('a');
    element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(csv));
    element.setAttribute('download', 'amazon-export.csv');
    element.innerText = 'Download CSV';

    heading.insertAdjacentElement('afterend', element);
})();