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index.html
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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Barnard Castle</title>
<meta name="description" content="Simple app to scan NHS COVID-19 QR codes if you cannot use the official app">
<meta property="og:title" content="Barnard Castle">
<meta property="og:description" content="Scan NHS COVID-19 QR codes without an app">
<meta property="og:type" content="website">
<meta property="og:url" content="https://covidqr.nti.me.uk/" />
<meta property="og:image" content="https://covidqr.nti.me.uk/images/barnard-castle.png">
<meta property="og:site_name" content="Barnard Castle">
<meta name="twitter:card" content="summary">
<meta name="twitter:image" content="https://covidqr.nti.me.uk/images/barnard-castle.png">
<meta name="twitter:image:alt" content="QR code">
<meta name="twitter:title" content="Barnard Castle">
<meta name="twitter:description" content="Scan NHS COVID-19 QR codes without an app">
<link rel="apple-touch-icon" sizes="57x57" href="/images/apple-icon-57x57.png">
<link rel="apple-touch-icon" sizes="60x60" href="/images/apple-icon-60x60.png">
<link rel="apple-touch-icon" sizes="72x72" href="/images/apple-icon-72x72.png">
<link rel="apple-touch-icon" sizes="76x76" href="/images/apple-icon-76x76.png">
<link rel="apple-touch-icon" sizes="114x114" href="/images/apple-icon-114x114.png">
<link rel="apple-touch-icon" sizes="120x120" href="/images/apple-icon-120x120.png">
<link rel="apple-touch-icon" sizes="144x144" href="/images/apple-icon-144x144.png">
<link rel="apple-touch-icon" sizes="152x152" href="/images/apple-icon-152x152.png">
<link rel="apple-touch-icon" sizes="180x180" href="/images/apple-icon-180x180.png">
<link rel="icon" type="image/png" sizes="192x192" href="/images/android-icon-192x192.png">
<link rel="icon" type="image/png" sizes="32x32" href="/images/favicon-32x32.png">
<link rel="icon" type="image/png" sizes="96x96" href="/images/favicon-96x96.png">
<link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16.png">
<link rel="manifest" href="/manifest.json">
<meta name="msapplication-TileColor" content="#ffffff">
<meta name="msapplication-TileImage" content="/images/ms-icon-144x144.png">
<meta name="theme-color" content="#ffffff">
<link rel="stylesheet" type="text/css" href="css/bulma.min.css?v=1" />
<link rel="stylesheet" type="text/css" href="css/castle.css?v=2" />
<script defer src="lib/fontawesome/js/all.js"></script>
</head>
<body>
<section id="scan-dialog" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<p class="has-text-centered">
<video autoplay playsinline id="video"></video>
</p>
</div>
<button class="modal-close is-large" aria-label="close" id="stop-button"></button>
<button class="m-3 button is-rounded is-light is-outlined" aria-label="flash" id="flash-button">
<span class="icon is-small">
<i class="fas fa-bolt"></i>
</span>
</button>
</section>
<header class="hero">
<div class="hero-body">
<div class="container">
<h1 class="title">Barnard Castle</h1>
<h2 class="subtitle">NHS COVID-19 QR Scanner</h2>
<div class="content">
<p>Simple app to scan NHS COVID-19 QR codes if you cannot use the official app.</p>
<p>You can keep track of where you've been by saving check-ins in your browser, publish the location
of venues, or just find out
what's in those huge QR codes!</p>
<h3>Privacy</h3>
<p>No personal data is collected by this app. Check-ins are stored on your device and can be removed
using the <b>Clear history</b> button at any time.</p>
<p>If you choose to publish location venues, only the contents of the QR code and location data will
be sent.</p>
</div>
<div class="buttons">
<button class="button is-primary is-light has-text-grey-darker has-text-weight-semibold is-medium" id="start-button">
<span class="icon is-small">
<i class="fas fa-camera"></i>
</span>
<span>Scan</span>
</button>
</div>
<div class="field is-grouped is-grouped-multiline">
<div class="control">
<div class="button is-light" id="file-button">
<div class="file is-light">
<label class="file-label">
<input class="file-input" type="file" accept="image/*" name="qr-file" id="qr-file">
<span class="file-cta">
<span class="file-icon">
<i class="fas fa-image"></i>
</span>
<span class="file-label">
Choose an image…
</span>
</span>
</label>
</div>
</div>
</div>
<div class="control">
<button class="button is-light" id="qr-paste-button">
<span class="icon is-small">
<i class="fas fa-paste"></i>
</span>
<span>Paste UKC19TRACING text</span>
</button>
</div>
</div>
</div>
</div>
</header>
<main class="section pt-0">
<div class="container">
<div class="columns">
<div class="column">
<div id="no-nhsqr-message" class="message is-info is-hidden">
<div class="message-body has-text-grey-darker">
No NHS COVID-19 QR code detected
</div>
</div>
<div class="box" id="venue-box">
<div class="field is-hidden">
<label class="label" for="qr-content">QR Code Contents</label>
<div class="control">
<textarea class="textarea has-fixed-area" id="qr-content" placeholder="UKC19TRACING:1:"
readonly></textarea>
</div>
</div>
<div class="field">
<label class="label" for="venue-text">Venue Details</label>
<div class="control">
<textarea class="textarea is-info has-fixed-area" id="venue-text" readonly></textarea>
</div>
</div>
<div class="field is-grouped is-grouped-left">
<p class="control">
<button class="button" id="add-button" disabled>
<span class="icon is-small">
<i class="fas fa-door-open"></i>
</span>
<span>Check in</span>
</button>
</p>
<p class="control">
<button class="button" id="share-button" disabled>
<span class="icon is-small">
<i class="fas fa-map-marker-alt"></i>
</span>
<span>Publish venue</span>
</button>
</p>
</div>
</div>
<div id="publish-success-message" class="message is-success is-hidden">
<div class="message-body has-text-grey-darker">
Thank you, venue location published
</div>
</div>
<div id="publish-fail-message" class="message is-warning is-hidden">
<div class="message-body has-text-grey-darker">
Sorry, could not publish venue location
</div>
</div>
</div>
<div class="column">
<div class="box">
<div class="content">
<table class="table">
<thead>
<tr>
<th>Time</th>
<th>Venue</th>
<th>ID</th>
</tr>
</thead>
<tbody id="qr-history"></tbody>
</table>
<div class="field is-grouped is-grouped-right">
<p class="control">
<button class="button is-danger is-light has-text-danger-dark" id="clear-button">
<span class="icon is-small">
<i class="fas fa-trash-alt"></i>
</span>
<span>Clear history</span>
</button>
</p>
</div>
</div>
</div>
</div>
</div>
</div>
</main>
<footer class="footer">
<div class="content has-text-centered">
<p>
<a href="https://github.com/jt-nti/barnard-castle" class="has-text-link-dark">Source code on
GitHub</a>.
</p>
</div>
</footer>
<script src="lib/jsQR.js"></script>
<script src="lib/load-image.all.min.js"></script>
<script src="lib/jwt-decode.min.js"></script>
<script src="js/castle.js"></script>
<script>
const startButton = document.getElementById('start-button');
const stopButton = document.getElementById('stop-button');
const flashButton = document.getElementById('flash-button');
const fileInput = document.getElementById('qr-file');
const pasteButton = document.getElementById('qr-paste-button');
const video = document.getElementById('video');
const qrContent = document.getElementById('qr-content');
const addButton = document.getElementById('add-button');
const shareButton = document.getElementById('share-button');
const qrHistory = document.getElementById('qr-history');
const clearButton = document.getElementById('clear-button');
var state = new State(document.documentElement,
document.getElementById('scan-dialog'),
document.getElementById('start-button'),
document.getElementById('file-button'),
document.getElementById('qr-file'),
document.getElementById('qr-paste-button'),
document.getElementById('no-nhsqr-message'),
document.getElementById('venue-text'),
document.getElementById('venue-box'),
document.getElementById('add-button'),
document.getElementById('share-button'),
document.getElementById('publish-success-message'),
document.getElementById('publish-fail-message'));
initDb().then(function (response) {
db = response;
loadScans(qrHistory);
});
var tickDuration = 200;
var tickTimeoutId;
var scanTimeoutId;
function tick() {
try {
var canvasElement = document.createElement("canvas");
var canvas = canvasElement.getContext("2d");
canvasElement.height = video.videoHeight;
canvasElement.width = video.videoWidth;
canvas.drawImage(video, 0, 0, canvasElement.width, canvasElement.height);
var imageData = canvas.getImageData(0, 0, canvasElement.width, canvasElement.height);
var code = jsQR(imageData.data, imageData.width, imageData.height, { inversionAttempts: 'dontInvert' });
if (code) {
// barcode was found!
qrContent.value = code.data;
if (previewCode(state, qrContent)) {
stop();
return;
}
}
}
catch (t) {
console.log("PROBLEM: " + t);
}
tickTimeoutId = setTimeout(function () { tick(); }, tickDuration);
}
function toggleFlash() {
const stream = video.srcObject;
const track = stream.getVideoTracks()[0];
const supportedConstraints = navigator.mediaDevices.getSupportedConstraints();
const settings = track.getSettings();
const torchSetting = settings.torch;
if (!supportedConstraints.torch || torchSetting == undefined) {
console.log('No torch detected');
console.log('Supported constraints', supportedConstraints);
console.log('Settings', settings);
return;
}
track.applyConstraints({ advanced: [{ torch: !torchSetting }] });
}
function start() {
qrContent.value = '';
state.startScan()
// Use facingMode: environment to attemt to get the front camera on phones
navigator.mediaDevices.getUserMedia({ video: { facingMode: "environment" } }).then(function (stream) {
video.srcObject = stream;
video.play();
tickTimeoutId = setTimeout(function () { tick(); }, tickDuration);
scanTimeoutId = setTimeout(function () {
previewCode(state, qrContent);
stop();
}, 99 * tickDuration);
});
}
function stop() {
clearTimeout(tickTimeoutId);
clearTimeout(scanTimeoutId);
tickTimeoutId = null;
scanTimeoutId = null;
const stream = video.srcObject;
const tracks = stream.getTracks();
tracks.forEach(function (track) {
track.stop();
});
video.srcObject = null;
state.scanFinished();
}
startButton.addEventListener('click', () => {
start();
});
flashButton.addEventListener('click', () => {
toggleFlash();
});
pasteButton.addEventListener('click', () => {
navigator.clipboard.readText().then(text => {
qrContent.value = text;
previewCode(state, qrContent);
});
});
stopButton.addEventListener('click', () => {
qrContent.value = '';
previewCode(state, qrContent);
stop();
});
addButton.addEventListener('click', () => {
checkIn(qrHistory, qrContent.value);
});
shareButton.addEventListener('click', () => {
publishVenue(state, qrContent.value);
});
clearButton.addEventListener('click', () => {
clearScans(qrHistory);
});
fileInput.onchange = function () {
state.loadImage();
const filename = this.files[0].name;
console.log(`Loading image ${filename}`);
const options = {
maxWidth: 640,
contain: true,
canvas: true
}
loadImage(this.files[0], options)
.then(function (data) {
var canvasElement = data.image;
var canvas = canvasElement.getContext("2d");
var imageData = canvas.getImageData(0, 0, canvasElement.width, canvasElement.height);
var code = jsQR(imageData.data, imageData.width, imageData.height, { inversionAttempts: 'dontInvert' });
if (code) {
// barcode was found!
qrContent.value = code.data;
} else {
qrContent.value = '';
}
previewCode(state, qrContent);
fileInput.value = '';
state.loadImageComplete();
})
.catch(function (err) {
console.log(`Error loading image ${filename}`, err);
fileInput.value = '';
state.loadImageComplete();
});
}
</script>
</body>
</html>