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index.js
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index.js
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// donate-bitcoin Copyright (GPL) 2016 Nathan Robinson
var address = "PUT_ADDRESS_HERE"; // The bitcoin address to receive donations. Change to yours
var popup = false; // Set to true if you want a popup to pay bitcoin
var currencyCode = "USD"; // Change to your default currency. Choose from https://blockchain.info/ticker?cors=true
var qrcode = true; // Set to false to disable qrcode
var link = true; // Set to false to disable generating hyperlink
var organization = "Example"; // Change to your organization name
var mbits = true; // Set to false to display bitcoin traditionally
var defaultAmountToDonate = 5; // Default amount to donate
var defaultCurrency = 'USD'; // Default currency to fallback
var showDefaultCurrencyDisclaimer = true; // If the requested cuurency is not available show a warning
var params = {};
if (location.search) {
var parts = location.search.substring(1).split('&');
for (var i = 0; i < parts.length; i++) {
var nv = parts[i].split('=');
if (!nv[0]) continue;
params[nv[0]] = nv[1] || true;
}
}
function turnName(data)
{
var returnstring = "";
for (i = 0; i < data.length; i++)
{
if (data[i] != "-")
{
returnstring = returnstring + data[i];
}
if (data[i] == "-")
{
returnstring = returnstring + " ";
}
}
return returnstring
}
if (params.address){address = params.address;}
if (params.popup == "true"){popup = true};
if (params.popup == "false"){popup = false};
if (params.currency){currencyCode = params.currency.toUpperCase();}
if (params.qrcode == "true"){qrcode = true};
if (params.qrcode == "false"){qrcode = false};
if (params.link == "true"){link = true};
if (params.link == "false"){link = false};
if (params.name){organization = turnName(params.name);}
if (params.mbits == "true"){mbits = true};
if (params.mbits == "false"){mbits = false};
function getBitcoinPrice(currencyExchangeResponse) {
try {
return currencyExchangeResponse[currencyCode]['buy'];
} catch (err) {
handlePricingError(currencyExchangeResponse);
return currencyExchangeResponse[currencyCode]['buy'];
}
}
function drawCurrencyButton() {
document.getElementById("donationbutton").src = 'https://img.shields.io/badge/donate-' + currencyCode + '-brightgreen.svg?style=flat-square';
}
function drawDonationElements(url, donateDisplayMessage) {
drawCurrencyButton();
if (qrcode == true) {
document.getElementById("qrcodePlaceHolder").innerHTML = "";
$('#qrcodePlaceHolder').qrcode(url);
}
if (link == true) {
document.getElementById("donatetext").innerHTML = "<br><a href='" + url + "'>" + donateDisplayMessage + "</a>";
}
}
function donate() {
$.getJSON("https://blockchain.info/ticker?cors=true", function(currencyExchangeResponse) {
var fiatDonationAmount = getFiatDonationAmount();
var bitcoinPrice = getBitcoinPrice(currencyExchangeResponse);
var bitcoinAmountToDonate = computeBitcoinAmount(fiatDonationAmount, bitcoinPrice);
var donationElements = composeDonationElements(bitcoinAmountToDonate, fiatDonationAmount);
drawDonationElements(donationElements.url, donationElements.message);
});
}
function handlePricingError(currencyExchangeResponse) {
if (showDefaultCurrencyDisclaimer){
var disclaimer = `Could not find the requested currency, will be using ${defaultCurrency} instead`;
alert(disclaimer);
}
currencyCode = defaultCurrency.toUpperCase();
}
function computeBitcoinAmount(fiatDonationAmount, bitcoin_price) {
var bitcoinAmountToDonate = (fiatDonationAmount / bitcoin_price).toFixed(8);
return bitcoinAmountToDonate;
}
function noValidInput(fiatUserInput) {
return isNaN(fiatUserInput) == true;
}
function validAmountRequestedInUrl() {
return isNaN(params.amount) == false
}
function getFiatDonationAmount() {
// if user sets an amount, we will use it
var fiatUserInput = parseFloat(document.getElementById("donatebox").value);
if (noValidInput(fiatUserInput) && !validAmountRequestedInUrl()) {
return defaultAmountToDonate;
} else if (noValidInput(fiatUserInput) && validAmountRequestedInUrl()) {
return params.amount;
}
return fiatUserInput;
}
function composeDonationElements(bitcoinAmountToDonate, fiatDonationAmount) {
var url = "bitcoin:" + address + "?amount=" + bitcoinAmountToDonate;
var fiatAmountToDonateMessage = " (" + fiatDonationAmount + " " + currencyCode + ") " + "to " + address;
var donateDisplayMessage = " Please send " + bitcoinAmountToDonate.toString() + " Bitcoin" + fiatAmountToDonateMessage;
if (mbits == true) {
var mbitprice = (bitcoinAmountToDonate * 1000).toFixed(2);
var donateDisplayMessage = " Please send " + mbitprice.toString() + " mBits" + fiatAmountToDonateMessage;
}
return {
url: url,
message: donateDisplayMessage
};
}
$(document).keyup(function (e) {
if ($(".input1:focus") && (e.keyCode === 13)) {
donate();
}
});