305 lines
12 KiB
JavaScript
305 lines
12 KiB
JavaScript
import {saveAs} from 'file-saver'
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import {BrowserQRCodeReader} from '@zxing/browser'
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import React, {useEffect, useRef, useState} from "react"
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import {decodeData} from "../src/decode"
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import {processPdf, processPng} from "../src/process"
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import {createPass} from "../src/pass"
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import Card from "../components/Card"
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import Alert from "../components/Alert"
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import jsQR from "jsqr";
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export default Form
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function Form() {
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function readFileAsync(file) {
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return new Promise((resolve, reject) => {
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let reader = new FileReader();
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reader.onload = () => {
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resolve(reader.result);
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};
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reader.onerror = reject;
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reader.readAsArrayBuffer(file);
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})
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}
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const error = function (heading, message) {
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const alert = document.getElementById('alert')
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alert.setAttribute('style', null)
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document.getElementById('heading').innerHTML = heading
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document.getElementById('message').innerHTML = message
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document.getElementById('spin').style.display = 'none'
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}
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const processFile = async function () {
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console.log(qrCode)
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console.log(file)
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if (!qrCode && !file) {
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error("Error", "Please capture a QR Code or select a file to scan");
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return;
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}
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document.getElementById('spin').style.display = 'block'
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let rawData;
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if (file) {
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let imageData
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const fileBuffer = await readFileAsync(file)
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switch (file.type) {
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case 'application/pdf':
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console.log('pdf')
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imageData = await processPdf(fileBuffer)
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break
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case 'image/png':
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console.log('png')
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imageData = await processPng(fileBuffer)
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break
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default:
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error('Error', 'Invalid file type')
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return
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}
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let code = jsQR(imageData.data, imageData.width, imageData.height, {
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inversionAttempts: 'dontInvert',
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})
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rawData = code.data;
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} else {
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rawData = qrCode.getText()
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}
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if (rawData) {
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let decoded
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try {
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decoded = decodeData(rawData)
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} catch (e) {
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error('Invalid QR code found', 'Try another method to select your certificate')
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return;
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}
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return {decoded: decoded, raw: rawData}
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} else {
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error('No QR code found', 'Try another method to select your certificate')
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}
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}
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const addToWallet = async function (event) {
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event.preventDefault()
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let result
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try {
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result = await processFile()
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} catch (e) {
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error('Error:', 'Could not extract QR code data from certificate')
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}
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if (typeof result === 'undefined') {
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return
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}
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const color = document.getElementById('color').value
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try {
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const pass = await createPass(
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{
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decoded: result.decoded,
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raw: result.raw,
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color: color
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}
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)
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if (!pass) {
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error('Error:', "Something went wrong.")
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} else {
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const passBlob = new Blob([pass], {type: "application/vnd.apple.pkpass"});
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saveAs(passBlob, 'covid.pkpass')
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}
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} catch (e) {
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error('Error:', e.message)
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} finally {
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document.getElementById('spin').style.display = 'none'
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}
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}
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const [isCameraOpen, setIsCameraOpen] = useState(false);
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const [globalControls, setGlobalControls] = useState(undefined);
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const [qrCode, setQrCode] = useState(undefined);
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const [file, setFile] = useState(undefined);
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const inputFile = useRef(undefined)
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useEffect(() => {
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if (inputFile && inputFile.current) {
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inputFile.current.addEventListener('input', () => {
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let selectedFile = inputFile.current.files[0];
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if (selectedFile !== undefined) {
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setQrCode(undefined);
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setFile(selectedFile);
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}
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});
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}
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}, [inputFile])
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async function showFileDialog() {
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inputFile.current.click();
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}
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async function hideCameraView() {
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if (globalControls !== undefined) {
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globalControls.stop();
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}
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setIsCameraOpen(false);
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}
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async function showCameraView() {
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const codeReader = new BrowserQRCodeReader();
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// Needs to be called before any camera can be accessed
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await BrowserQRCodeReader.listVideoInputDevices();
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// Get preview Element to show camera stream
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const previewElem = document.querySelector('#cameraPreview');
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setGlobalControls(await codeReader.decodeFromVideoDevice(undefined, previewElem, (result, error, controls) => {
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if (result !== undefined) {
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setQrCode(result);
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setFile(undefined);
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controls.stop();
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// Reset
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setGlobalControls(undefined);
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setIsCameraOpen(false);
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}
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}));
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setIsCameraOpen(true);
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}
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return (
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<div>
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<form className="space-y-5" id="form" onSubmit={(e) => addToWallet(e)}>
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<Card step={1} heading="Select Certificate" content={
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<div className="space-y-5">
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<p>
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Please select the certificate screenshot or (scanned) PDF page, which you received from your
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doctor, pharmacy, vaccination centre or online. Note that taking a picture does not work on
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most devices yet.
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</p>
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<div className="grid grid-cols-1 md:grid-cols-2 gap-5">
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<button
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type="button"
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onClick={isCameraOpen ? hideCameraView : showCameraView}
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className="focus:outline-none h-20 bg-gray-500 hover:bg-gray-700 text-white font-semibold rounded-md">
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{isCameraOpen ? "Stop Camera" : "Start Camera"}
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</button>
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<button
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type="button"
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onClick={showFileDialog}
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className="focus:outline-none h-20 bg-gray-500 hover:bg-gray-700 text-white font-semibold rounded-md">
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Open File (PDF, PNG)
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</button>
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</div>
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<video id="cameraPreview" className={`${isCameraOpen ? undefined : "hidden"} rounded-md w-full`}/>
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<input type='file'
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id='file'
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accept="application/pdf,image/png"
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ref={inputFile}
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style={{display: 'none'}}
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/>
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{(qrCode || file) &&
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<div className="flex items-center space-x-1">
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<svg className="h-4 w-4 text-green-600" fill="none" viewBox="0 0 24 24"
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stroke="currentColor">
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<path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 5l7 7-7 7"/>
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</svg>
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<span className="w-full">
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{
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qrCode && 'Found QR Code!'
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}
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{
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file && file.name
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}
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</span>
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</div>}
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</div>
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}/>
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<Card step={2} heading="Pick a Color" content={
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<div className="space-y-5">
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<p>
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Pick a background color for your pass.
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</p>
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<div className="relative inline-block w-full">
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<select name="color" id="color"
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className="bg-gray-200 dark:bg-gray-900 focus:outline-none w-full h-10 pl-3 pr-6 text-base rounded-md appearance-none cursor-pointer">
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<option value="white">white</option>
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<option value="black">black</option>
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<option value="grey">grey</option>
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<option value="green">green</option>
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<option value="indigo">indigo</option>
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<option value="blue">blue</option>
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<option value="purple">purple</option>
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<option value="teal">teal</option>
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</select>
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<div className="absolute inset-y-0 right-0 flex items-center px-2 pointer-events-none">
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<svg className="w-5 h-5 fill-current" viewBox="0 0 20 20">
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<path
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d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z"
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clipRule="evenodd" fillRule="evenodd"/>
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</svg>
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</div>
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</div>
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</div>
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}/>
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<Card step={3} heading="Add to Wallet" content={
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<div className="space-y-5">
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<p>
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Data privacy is of special importance when processing health-related data.
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In order for you to make an informed decision, please read the <a href="/privacy">Privacy
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Policy</a>.
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</p>
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<label htmlFor="privacy" className="flex flex-row space-x-4 items-center">
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<input type="checkbox" id="privacy" value="privacy" required className="h-4 w-4"/>
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<p>
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I accept the <a href="/privacy" className="underline">Privacy Policy</a>
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</p>
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</label>
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<div className="flex flex-row items-center justify-start">
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<button id="download" type="download"
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className="focus:outline-none bg-green-600 py-2 px-3 text-white font-semibold rounded-md disabled:bg-gray-400">
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Add to Wallet
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</button>
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<div id="spin" style={{"display": "none"}}>
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<svg className="animate-spin h-5 w-5 ml-2" viewBox="0 0 24 24">
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<circle className="opacity-0" cx="12" cy="12" r="10" stroke="currentColor"
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strokeWidth="4"/>
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<path className="opacity-75" fill="currentColor"
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d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"/>
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</svg>
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</div>
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</div>
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</div>
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}/>
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</form>
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<Alert/>
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<canvas id="canvas" style={{display: "none"}}/>
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</div>
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)
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}
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