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Tatu / MiningPoolHub balance converter

// ==UserScript==
// @name         MiningPoolHub balance converter
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://miningpoolhub.com/?page=account&action=balances
// @grant        none
// @license MIT
// @copyright 2017, Tatu (https://openuserjs.org/users/Tatu)
// ==/UserScript==

(function() {
    'use strict';

    function Get(yourUrl){
        var Httpreq = new XMLHttpRequest(); // a new request
        Httpreq.open("GET",yourUrl,false);
        Httpreq.send(null);
        return Httpreq.responseText;
    }

    var table = document.getElementById("main").getElementsByClassName("module")[0].getElementsByTagName("tbody")[0];
    var total = 0;

    for(var i=0; i<table.getElementsByTagName("tr").length; i++) {
        var items = table.getElementsByTagName("tr")[i].getElementsByTagName("td");
        var coin = items[0].getElementsByTagName("a")[0].innerHTML;
        var json;
        if (coin.startsWith("Digibyte")) coin = "Digibyte";
        if (coin.startsWith("Myriad")) coin = "Myriad";
        json = JSON.parse(Get("https://api.coinmarketcap.com/v1/ticker/"+ coin + "/?convert=EUR"));
        if (json.errorjson !== undefined) json = JSON.parse('[{}]');
        for(var j=1; j<4; j++){
            var amount = items[j].innerHTML;
            var price;
            if (amount.indexOf("</a>") !== -1) {
                var amounts = amount.replace('<a title="Unconfirmed">(', '');
                amounts = amounts.replace(')</a>', '');
                amounts = amounts.split(" ");
                if (parseFloat(amounts[0]) !== 0 || parseFloat(amounts[1]) !== 0) {
                    price = [parseFloat(json[0].price_eur)*parseFloat(amounts[0]), parseFloat(json[0].price_eur)*parseFloat(amounts[1])];
                    items[j].innerHTML = "<span>"+amount+"</span><br><span>"+price[0].toFixed(3)+"€ ("+price[1].toFixed(3)+"€)</span>";
                    total += price[0] + price[1];
                }
            } else if (parseFloat(amount) !== 0) {
                price = parseFloat(json[0].price_eur)*parseFloat(amount);
                items[j].innerHTML = "<span>"+amount+"</span><br><span>"+price.toFixed(3)+"€</span>";
                total += price;
            }
        }
    }
    console.log("Total: " + total.toFixed(3) + "€");
    document.getElementById("main").getElementsByClassName("module")[0].getElementsByTagName("header")[0].getElementsByTagName("h3")[0].innerHTML = document.getElementById("main").getElementsByClassName("module")[0].getElementsByTagName("header")[0].getElementsByTagName("h3")[0].innerHTML + " - Total Balance: " + total.toFixed(3) + "€";
})();