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userscripts/SteamPriceConverter/SteamPriceConverter.user.js

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// ==UserScript==
// @name Steam Price Converter
// @namespace https://github.com/Maks1mS/userscripts
// @version 0.5
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// @description Converts prices to rubles
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// @author Maxim Slipenko
// @match https://store.steampowered.com/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=steampowered.com
// @grant GM_xmlhttpRequest
// @grant GM_registerMenuCommand
// ==/UserScript==
(function () {
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'use strict';
const SYMBOL_TO_CODE_MAPPING = {
'₸': 'KZT',
'$': 'USD',
'₴': 'UAH',
}
let state = {
source_symbol: undefined
}
const delay = (ms) =>
new Promise(resolve => setTimeout(resolve, ms));
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async function getRates() {
const arr = await new Promise((resolve, reject) => {
GM_xmlhttpRequest({
method: 'GET',
url: 'https://www.cbr-xml-daily.ru/daily_utf8.xml',
onload: function (res) {
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const valutes = res.responseXML.getElementsByTagName('Valute');
resolve([...valutes].map((valute) => {
const charCode = valute.getElementsByTagName('CharCode')[0].textContent;
const value = parseFloat(valute.getElementsByTagName('Value')[0].textContent.replace(',', '.'));
const nominal = parseFloat(valute.getElementsByTagName('Nominal')[0].textContent.replace(',', '.'));
return {
charCode,
value: +(value / nominal).toFixed(4)
}
}))
},
})
})
return Object.fromEntries(
arr.map(obj => [obj.charCode, obj])
);
}
function getCurrentValute() {
const walletText = document.getElementById('header_wallet_balance').innerText;
state.source_symbol = Object.keys(SYMBOL_TO_CODE_MAPPING).find(symbol => walletText.includes(symbol))
return SYMBOL_TO_CODE_MAPPING[state.source_symbol];
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}
async function main() {
const rates = await getRates();
const source_valute = getCurrentValute();
if (!source_valute) {
return;
}
await delay(75);
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const convert = (n) => +(n * rates[source_valute].value).toFixed(2);
replace(convert);
// GM_registerMenuCommand("update", () => replace(convert), "u");
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}
function replace(convert) {
let r = document.evaluate(`//text()[contains(., \"${state.source_symbol}\")]`, document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
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for (let i = 0; i < r.snapshotLength; i++) {
let n = r.snapshotItem(i);
let textContent = n.textContent;
let regex = new RegExp(`(${state.source_symbol}\\s*[0-9\\s]+[.,]?[0-9]*|[0-9\\s]+[.,]?[0-9]*\\s*${state.source_symbol})`, 'g');
let newContent = textContent.replace(regex, (match) => {
let value;
if (match.includes(state.source_symbol)) {
value = parseFloat(match.replace(state.source_symbol, '').replace(' ', '').replace(',', '.').trim());
} else {
value = parseFloat(match.replace(' ', '').replace(',', '.'));
}
return `${convert(value)} ₽ / ${value} ${state.source_symbol}`;
});
let newNode = document.createTextNode(newContent);
n.parentNode.replaceChild(newNode, n);
console.log(newNode);
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}
}
main();
})();