feat: complete v1 — QR invoice generator with i18n, short URLs, offline support
- XMR address validation (standard, subaddress, integrated) - Amount in XMR/EUR/USD/CHF with CoinGecko conversion - QR code generation with monero: URI - Shareable short URLs (/s/abc123) via self-hosted PHP backend - i18n (DE/EN) with browser language detection - Service worker for offline capability - Dark mode, responsive design
This commit is contained in:
Alexander Schmidt
344
app.js
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344
app.js
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(function () {
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'use strict';
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// --- Config ---
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const COINGECKO_API = 'https://api.coingecko.com/api/v3/simple/price?ids=monero&vs_currencies=eur,usd,chf';
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// Standard address (4..., 95 chars), Subaddress (8..., 95 chars), Integrated address (4..., 106 chars)
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const XMR_STANDARD_REGEX = /^[48][1-9A-HJ-NP-Za-km-z]{94}$/;
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const XMR_INTEGRATED_REGEX = /^4[1-9A-HJ-NP-Za-km-z]{105}$/;
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const CACHE_DURATION = 60000; // 1 min
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const RATE_RETRY_DELAY = 10000; // 10s retry on failure
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// --- State ---
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let fiatRates = null;
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let ratesTimestamp = 0;
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let countdownInterval = null;
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let ratesFailed = false;
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// --- DOM ---
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const $ = (s) => document.querySelector(s);
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const addrInput = $('#addr');
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const amountInput = $('#amount');
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const currencySelect = $('#currency');
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const descInput = $('#desc');
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const timerInput = $('#timer');
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const generateBtn = $('#generate');
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const resultSection = $('#result');
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const qrContainer = $('#qr');
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const uriBox = $('#uri');
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const copyUriBtn = $('#copyUri');
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const copyAddrBtn = $('#copyAddr');
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const downloadBtn = $('#downloadQr');
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const countdownEl = $('#countdown');
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const fiatHint = $('#fiatHint');
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const toast = $('#toast');
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const shareLinkInput = $('#shareLink');
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const copyShareLinkBtn = $('#copyShareLink');
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const newRequestBtn = $('#newRequest');
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const homeLink = $('#homeLink');
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// --- Init ---
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fetchRates();
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loadFromHash() || loadSaved();
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registerSW();
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// --- Events ---
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addrInput.addEventListener('input', validateAddress);
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amountInput.addEventListener('input', updateFiatHint);
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currencySelect.addEventListener('change', updateFiatHint);
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generateBtn.addEventListener('click', generate);
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copyUriBtn.addEventListener('click', () => copyToClipboard(uriBox.textContent));
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copyAddrBtn.addEventListener('click', () => copyToClipboard(addrInput.value.trim()));
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copyShareLinkBtn.addEventListener('click', () => copyToClipboard(shareLinkInput.value));
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downloadBtn.addEventListener('click', downloadQR);
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newRequestBtn.addEventListener('click', resetForm);
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homeLink.addEventListener('click', function (e) { e.preventDefault(); resetForm(); });
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// --- Functions ---
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function resetForm() {
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addrInput.value = '';
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amountInput.value = '';
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currencySelect.value = 'EUR';
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descInput.value = '';
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timerInput.value = '';
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fiatHint.textContent = '';
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fiatHint.classList.remove('error');
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addrInput.classList.remove('valid', 'invalid');
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generateBtn.disabled = true;
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resultSection.classList.remove('visible');
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if (countdownInterval) clearInterval(countdownInterval);
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qrContainer.innerHTML = '';
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uriBox.textContent = '';
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shareLinkInput.value = '';
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history.replaceState(null, '', location.pathname);
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window.scrollTo({ top: 0, behavior: 'smooth' });
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addrInput.focus();
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}
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function isValidAddress(addr) {
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return XMR_STANDARD_REGEX.test(addr) || XMR_INTEGRATED_REGEX.test(addr);
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}
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function validateAddress() {
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const val = addrInput.value.trim();
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addrInput.classList.remove('valid', 'invalid');
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if (val.length === 0) return;
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if (isValidAddress(val)) {
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addrInput.classList.add('valid');
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} else if (val.length >= 10) {
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addrInput.classList.add('invalid');
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}
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updateGenerateBtn();
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}
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function updateGenerateBtn() {
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const addr = addrInput.value.trim();
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generateBtn.disabled = !isValidAddress(addr);
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}
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function updateFiatHint() {
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const amount = parseFloat(amountInput.value);
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const currency = currencySelect.value;
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if (!amount || amount <= 0) {
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fiatHint.textContent = '';
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fiatHint.classList.remove('error');
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return;
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}
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if (currency !== 'XMR' && !fiatRates) {
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fiatHint.textContent = ratesFailed ? I18n.t('rates_offline') : '';
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fiatHint.classList.toggle('error', ratesFailed);
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return;
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}
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fiatHint.classList.remove('error');
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if (currency === 'XMR') {
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if (fiatRates) {
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const eur = (amount * fiatRates.eur).toFixed(2);
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fiatHint.textContent = '\u2248 ' + eur + ' EUR';
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} else {
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fiatHint.textContent = '';
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}
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} else {
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const rate = fiatRates[currency.toLowerCase()];
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if (rate && rate > 0) {
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const xmr = (amount / rate).toFixed(8);
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fiatHint.textContent = '\u2248 ' + xmr + ' XMR';
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}
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}
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}
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function getXmrAmount() {
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const amount = parseFloat(amountInput.value);
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const currency = currencySelect.value;
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if (!amount || amount <= 0) return null;
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if (currency === 'XMR') return amount;
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if (fiatRates) {
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const rate = fiatRates[currency.toLowerCase()];
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if (rate && rate > 0) return amount / rate;
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}
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return null;
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}
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function buildUri(addr, xmrAmount, desc) {
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let uri = 'monero:' + addr;
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const params = [];
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if (xmrAmount) params.push('tx_amount=' + xmrAmount.toFixed(12));
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if (desc) params.push('tx_description=' + encodeURIComponent(desc));
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if (params.length) uri += '?' + params.join('&');
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return uri;
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}
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function buildHash(addr, xmrAmount, desc, timer) {
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const params = new URLSearchParams();
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params.set('a', addr);
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if (xmrAmount) params.set('x', xmrAmount.toFixed(12));
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if (desc) params.set('d', desc);
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if (timer) params.set('t', timer);
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return params.toString();
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}
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async function shortenUrl(hash) {
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try {
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const res = await fetch('/api/shorten.php', {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ hash: hash })
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});
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if (!res.ok) throw new Error('HTTP ' + res.status);
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const data = await res.json();
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return location.origin + '/s/' + data.code;
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} catch (e) {
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console.warn('Short URL failed:', e);
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return null;
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}
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}
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function generate() {
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const addr = addrInput.value.trim();
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if (!isValidAddress(addr)) return;
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const xmrAmount = getXmrAmount();
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const desc = descInput.value.trim();
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const timer = parseInt(timerInput.value) || 0;
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const uri = buildUri(addr, xmrAmount, desc);
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// Show result
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resultSection.classList.add('visible');
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uriBox.textContent = uri;
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// Share link — show long URL immediately, then replace with short
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const hash = buildHash(addr, xmrAmount, desc, timer);
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shareLinkInput.value = location.origin + '/#' + hash;
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shortenUrl(hash).then(function (shortUrl) {
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if (shortUrl) shareLinkInput.value = shortUrl;
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});
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// QR
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qrContainer.innerHTML = '';
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new QRCode(qrContainer, {
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text: uri,
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width: 256,
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height: 256,
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colorDark: '#ffffff',
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colorLight: '#1a1a1a',
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correctLevel: QRCode.CorrectLevel.M
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});
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// Countdown
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startCountdown();
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// Save to LocalStorage
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saveState(addr);
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// Scroll to result
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resultSection.scrollIntoView({ behavior: 'smooth', block: 'start' });
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}
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function loadFromHash() {
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const hash = location.hash.substring(1);
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if (!hash) return false;
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const params = new URLSearchParams(hash);
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const addr = params.get('a');
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if (!addr || !isValidAddress(addr)) return false;
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addrInput.value = addr;
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validateAddress();
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const xmr = params.get('x');
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if (xmr) {
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amountInput.value = parseFloat(xmr);
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currencySelect.value = 'XMR';
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}
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const desc = params.get('d');
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if (desc) descInput.value = desc;
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const timer = params.get('t');
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if (timer && parseInt(timer) > 0) timerInput.value = timer;
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// Auto-generate
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setTimeout(generate, 100);
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return true;
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}
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function startCountdown() {
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if (countdownInterval) clearInterval(countdownInterval);
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countdownEl.textContent = '';
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countdownEl.className = 'countdown';
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const minutes = parseInt(timerInput.value);
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if (!minutes || minutes <= 0) return;
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const end = Date.now() + minutes * 60000;
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countdownEl.classList.add('active');
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function tick() {
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const remaining = end - Date.now();
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if (remaining <= 0) {
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clearInterval(countdownInterval);
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countdownEl.textContent = I18n.t('countdown_expired');
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countdownEl.className = 'countdown expired';
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return;
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}
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const m = Math.floor(remaining / 60000);
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const s = Math.floor((remaining % 60000) / 1000);
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countdownEl.textContent = I18n.t('countdown_remaining') + pad(m) + ':' + pad(s);
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}
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tick();
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countdownInterval = setInterval(tick, 1000);
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}
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function pad(n) {
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return n < 10 ? '0' + n : '' + n;
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}
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function downloadQR() {
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const canvas = qrContainer.querySelector('canvas');
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if (!canvas) return;
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const link = document.createElement('a');
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link.download = 'xmrpay-qr.png';
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link.href = canvas.toDataURL('image/png');
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link.click();
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}
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function copyToClipboard(text) {
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navigator.clipboard.writeText(text).then(() => {
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showToast(I18n.t('toast_copied'));
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});
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}
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function showToast(msg) {
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toast.textContent = msg;
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toast.classList.add('show');
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setTimeout(() => toast.classList.remove('show'), 2000);
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}
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function saveState(addr) {
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try {
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localStorage.setItem('xmrpay_addr', addr);
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} catch (e) { /* silent */ }
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}
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function loadSaved() {
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try {
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const addr = localStorage.getItem('xmrpay_addr');
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if (addr) {
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addrInput.value = addr;
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validateAddress();
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}
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} catch (e) { /* silent */ }
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}
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async function fetchRates() {
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if (fiatRates && Date.now() - ratesTimestamp < CACHE_DURATION) return;
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try {
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const res = await fetch(COINGECKO_API);
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if (!res.ok) throw new Error('HTTP ' + res.status);
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const data = await res.json();
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fiatRates = data.monero;
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ratesTimestamp = Date.now();
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ratesFailed = false;
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updateFiatHint();
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} catch (e) {
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console.warn('Kurse konnten nicht geladen werden:', e);
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ratesFailed = true;
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updateFiatHint();
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setTimeout(fetchRates, RATE_RETRY_DELAY);
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}
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}
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function registerSW() {
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if ('serviceWorker' in navigator) {
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navigator.serviceWorker.register('sw.js').catch(function () {});
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}
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}
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})();
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