Expand bitstamp transactions page with running balance in USD in BTC

bitstampTxRunningBalance.js

function processBitstampTx(balanceEur = 0, balanceUsd = 0, balanceBtc = 0, account = "Main Account"){
    
    
    const balances = { };

    function deposit(textAmount){
        console.log("%cDeposit: " + textAmount, "color:green");
        const split = textAmount.split(" ");
        const amount = parseFloat(split[0]);
        const currency = split[1];
        balances[currency] = balances[currency] || 0;
        balances[currency] += amount;
    }

    function withdrawal(textAmount){
        console.log("%cWithdraw: " + textAmount, "color: red");
        const split = textAmount.split(" ");
        const amount = parseFloat(split[0]);
        const currency = split[1];
        balances[currency] = balances[currency] || 0;
        balances[currency] -= amount;
    }

    function buy(row){

        const textAmount = $(row).find("div.table__cell").eq(3).text();
        
        const split = textAmount.split(" ");
        const boughtAmount = parseFloat(split[0]);
        const boughtCurrency = split[1];

        const spentAmountText = $(row).find("div.table__cell").eq(4).text();
        const spentSplit =  spentAmountText.split(" ");
        const spentAmount = parseFloat(spentSplit[0]);
        const spentCurrency = spentSplit[1];
        const spentCurrencyFeesText = $(row).find("div.table__cell").eq(6).text();
        const spentCurrencyFees = parseFloat(spentCurrencyFeesText.split(" ")[0]) || 0; //no fees when buying crypto with crypto, default NaN to 0

        console.log(`BUY ${textAmount} for ${spentAmountText} fee:${spentCurrencyFeesText}`);

        balances[boughtCurrency] = balances[boughtCurrency] || 0;
        balances[boughtCurrency] += boughtAmount;

        balances[spentCurrency] = balances[spentCurrency] || 0;
        balances[spentCurrency] -= (spentAmount + spentCurrencyFees);
    }

    function sell(row){
        const textAmount = $(row).find("div.table__cell").eq(3).text();
        const split = textAmount.split(" ");
        const soldAmount = parseFloat(split[0]);
        const soldCurrency = split[1];


        const gainedAmountText = $(row).find("div.table__cell").eq(4).text();
        const gainedSplit =  gainedAmountText.split(" ");
        const gainedAmount = parseFloat(gainedSplit[0]);
        const gainedCurrency = gainedSplit[1];
        const gainedCurrencyFeesText = $(row).find("div.table__cell").eq(6).text();
        const gainedCurrencyFees = parseFloat(gainedCurrencyFeesText.split(" ")[0]) || 0; //no fees when selling crypto for crypto, default NaN to 0

        console.log(`SELL ${textAmount} for ${gainedAmountText} with fee:${gainedCurrencyFeesText}`);

        balances[soldCurrency] = balances[soldCurrency] || 0;
        balances[soldCurrency] -= soldAmount;

        balances[gainedCurrency] = balances[gainedCurrency] || 0;
        balances[gainedCurrency] += (gainedAmount - gainedCurrencyFees);
    }



	const rows = Array.from($("div.table__row")
		.not(".details")
		.not(".dropdown-filters")
		.not(".table__row--header"))
		.reverse();
	
	
	rows.forEach((row) => {

        if(row.textContent.indexOf(account) < 0){
            // only process one account
            row.remove();
            return;
        }
		
		const isSell = row.textContent.startsWith("Sell");
		const isBuy = row.textContent.startsWith("Buy");
		const isWithdrawal = row.textContent.startsWith("Withdrawal");
        const isDeposit = row.textContent.startsWith("Deposit");

        const textAmount = $(row).find("div.table__cell").eq(3).text();
        const isEur = textAmount.indexOf("EUR") > -1;
		const isUsd = textAmount.indexOf("USD") > -1;			
        const isBtc = textAmount.indexOf("BTC") > -1;
        const isBch = textAmount.indexOf("BCH") > -1;

        const operation = $(row).find("div.table__cell").eq(0).text();

        switch(operation){
            case "Sell":
                sell(row);
                break;
            case "Buy":
                buy(row);
                break;
            case "Deposit":
                deposit(textAmount);
                break;
            case "Withdrawal":
                withdrawal(textAmount);
                break;
        }

        const balancesNoENotation = {...balances};
        Object.entries(balancesNoENotation).forEach(entry => {
            let key = entry[0];
            let value = entry[1];
            balancesNoENotation[key] = Math.round(value*100000000)/100000000;
          });
        console.log(balancesNoENotation);
				
		//const fiatBalanceCell = $(`<div class="table__cell">${: balanceEur.toFixed(2)+"€"}</div>`);
		//const btcBalanceCell = $(`<div class="table__cell">${balanceBtc.toFixed(8)}</div>`);
		//$(row).append(fiatBalanceCell, btcBalanceCell);
		
	});
}
processBitstampTx();