fix #7535: fix qr implementation
This commit is contained in:
Sebastian
parent
6f24b5a05e
commit
9d9a88af01
@ -25,9 +25,9 @@
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"@gnu-taler/taler-wallet-core": "workspace:*",
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"date-fns": "^2.29.2",
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"history": "4.10.1",
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"jsqr": "^1.4.0",
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"preact": "10.11.3",
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"preact-router": "3.2.1",
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"qr-scanner": "^1.4.1",
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"qrcode-generator": "^1.4.4",
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"tslib": "^2.4.0"
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},
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@ -14,17 +14,25 @@
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GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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import { classifyTalerUri, TalerUriType } from "@gnu-taler/taler-util";
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import {
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classifyTalerUri,
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TalerUriType,
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TranslatedString,
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} from "@gnu-taler/taler-util";
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import { styled } from "@linaria/react";
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import { css } from "@linaria/core";
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import { Fragment, h, VNode } from "preact";
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import { Ref, useEffect, useRef, useState } from "preact/hooks";
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import QrScanner from "qr-scanner";
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import { Ref, useEffect, useMemo, useRef, useState } from "preact/hooks";
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import { useTranslationContext } from "../context/translation.js";
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import { Alert } from "../mui/Alert.js";
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import { Button } from "../mui/Button.js";
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import { TextField } from "../mui/TextField.js";
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import jsQR, * as pr from "jsqr";
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import { InputFile } from "../mui/InputFile.js";
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import { Grid } from "../mui/Grid.js";
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import { notDeepEqual } from "assert";
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const QrVideo = styled.video`
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const QrCanvas = css`
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width: 80%;
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margin-left: auto;
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margin-right: auto;
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@ -32,6 +40,8 @@ const QrVideo = styled.video`
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background-color: black;
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`;
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const LINE_COLOR = "#FF3B58";
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const Container = styled.div`
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display: flex;
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flex-direction: column;
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@ -44,111 +54,303 @@ interface Props {
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onDetected: (url: string) => void;
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}
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export function QrReaderPage({ onDetected }: Props): VNode {
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const videoRef = useRef<HTMLVideoElement>(null);
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// const imageRef = useRef<HTMLImageElement>(null);
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const qrScanner = useRef<QrScanner | null>(null);
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const [value, onChange] = useState("");
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const [active, setActive] = useState(false);
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const { i18n } = useTranslationContext();
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type XY = { x: number; y: number };
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function start(): void {
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qrScanner.current!.start();
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onChange("");
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setActive(true);
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}
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function stop(): void {
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qrScanner.current!.stop();
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setActive(false);
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}
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function drawLine(
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canvas: CanvasRenderingContext2D,
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begin: XY,
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end: XY,
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color: string,
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) {
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canvas.beginPath();
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canvas.moveTo(begin.x, begin.y);
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canvas.lineTo(end.x, end.y);
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canvas.lineWidth = 4;
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canvas.strokeStyle = color;
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canvas.stroke();
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}
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function check(v: string) {
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return (
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v.startsWith("taler://") && classifyTalerUri(v) !== TalerUriType.Unknown
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);
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}
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useEffect(() => {
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if (!videoRef.current) {
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console.log("vide was not ready");
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return;
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}
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const elem = videoRef.current;
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setTimeout(() => {
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qrScanner.current = new QrScanner(
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elem,
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({ data, cornerPoints }) => {
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if (check(data)) {
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onDetected(data);
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return;
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}
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onChange(data);
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stop();
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},
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{
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maxScansPerSecond: 5, //default 25
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highlightScanRegion: true,
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},
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);
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start();
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}, 1);
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return () => {
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qrScanner.current?.destroy();
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};
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}, []);
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const isValid = check(value);
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return (
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<Container>
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{/* <InputFile onChange={(f) => scanImage(imageRef, f)}>
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Read QR from file
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</InputFile>
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<div ref={imageRef} /> */}
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<h1>
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<i18n.Translate>
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Scan a QR code or enter taler:// URI below
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</i18n.Translate>
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</h1>
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<QrVideo ref={videoRef} />
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<TextField
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label="Taler URI"
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variant="standard"
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fullWidth
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value={value}
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onChange={onChange}
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/>
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{isValid && (
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<Button variant="contained" onClick={async () => onDetected(value)}>
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<i18n.Translate>Open</i18n.Translate>
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</Button>
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)}
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{!active && !isValid && (
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<Fragment>
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<Alert severity="error">
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<i18n.Translate>
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URI is not valid. Taler URI should start with `taler://`
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</i18n.Translate>
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</Alert>
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<Button variant="contained" onClick={async () => start()}>
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<i18n.Translate>Try another</i18n.Translate>
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</Button>
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</Fragment>
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)}
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</Container>
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function drawBox(context: CanvasRenderingContext2D, code: pr.QRCode) {
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drawLine(
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context,
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code.location.topLeftCorner,
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code.location.topRightCorner,
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LINE_COLOR,
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);
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drawLine(
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context,
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code.location.topRightCorner,
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code.location.bottomRightCorner,
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LINE_COLOR,
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);
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drawLine(
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context,
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code.location.bottomRightCorner,
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code.location.bottomLeftCorner,
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LINE_COLOR,
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);
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drawLine(
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context,
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code.location.bottomLeftCorner,
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code.location.topLeftCorner,
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LINE_COLOR,
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);
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}
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async function scanImage(
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imageRef: Ref<HTMLImageElement>,
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image: string,
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): Promise<void> {
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const imageEl = new Image();
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imageEl.src = image;
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imageEl.width = 200;
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imageRef.current!.appendChild(imageEl);
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QrScanner.scanImage(image, {
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alsoTryWithoutScanRegion: true,
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})
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.then((result) => console.log(result))
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.catch((error) => console.log(error || "No QR code found."));
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const SCAN_PER_SECONDS = 3;
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const TIME_BETWEEN_FRAMES = 1000 / SCAN_PER_SECONDS;
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async function delay(ms: number) {
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return new Promise((resolve) => setTimeout(resolve, ms));
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}
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function drawIntoCanvasAndGetQR(
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tag: HTMLVideoElement | HTMLImageElement,
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canvas: HTMLCanvasElement,
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): string | undefined {
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const context = canvas.getContext("2d");
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if (!context) {
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throw Error("no 2d canvas context");
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}
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context.clearRect(0, 0, canvas.width, canvas.height);
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context.drawImage(tag, 0, 0, canvas.width, canvas.height);
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const imgData = context.getImageData(0, 0, canvas.width, canvas.height);
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const code = jsQR(imgData.data, canvas.width, canvas.height, {
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inversionAttempts: "attemptBoth",
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});
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if (code) {
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drawBox(context, code);
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return code.data;
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}
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return undefined;
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}
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async function readNextFrame(
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video: HTMLVideoElement,
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canvas: HTMLCanvasElement,
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): Promise<string | undefined> {
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const requestFrame =
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"requestVideoFrameCallback" in video
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? video.requestVideoFrameCallback.bind(video)
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: requestAnimationFrame;
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return new Promise<string | undefined>((ok, bad) => {
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requestFrame(() => {
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try {
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const code = drawIntoCanvasAndGetQR(video, canvas);
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ok(code);
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} catch (error) {
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bad(error);
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}
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});
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});
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}
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async function createCanvasFromVideo(
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video: HTMLVideoElement,
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canvas: HTMLCanvasElement,
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): Promise<string> {
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const context = canvas.getContext("2d", {
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willReadFrequently: true,
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});
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if (!context) {
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throw Error("no 2d canvas context");
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}
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canvas.width = video.videoWidth;
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canvas.height = video.videoHeight;
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let last = Date.now();
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let found: string | undefined = undefined;
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while (!found) {
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const timeSinceLast = Date.now() - last;
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if (timeSinceLast < TIME_BETWEEN_FRAMES) {
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await delay(TIME_BETWEEN_FRAMES - timeSinceLast);
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}
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last = Date.now();
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found = await readNextFrame(video, canvas);
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}
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video.pause();
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return found;
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}
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async function createCanvasFromFile(
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source: string,
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canvas: HTMLCanvasElement,
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): Promise<string | undefined> {
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const img = new Image(300, 300);
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img.src = source;
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canvas.width = img.width;
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canvas.height = img.height;
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return new Promise<string | undefined>((ok, bad) => {
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img.addEventListener("load", (e) => {
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try {
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const code = drawIntoCanvasAndGetQR(img, canvas);
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ok(code);
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} catch (error) {
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bad(error);
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}
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});
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});
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}
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async function waitUntilReady(video: HTMLVideoElement): Promise<void> {
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return new Promise((ok, bad) => {
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if (video.readyState === video.HAVE_ENOUGH_DATA) {
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return ok();
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}
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setTimeout(waitUntilReady, 100);
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});
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}
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export function QrReaderPage({ onDetected }: Props): VNode {
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const videoRef = useRef<HTMLVideoElement>(null);
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const canvasRef = useRef<HTMLCanvasElement>(null);
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const [error, setError] = useState<TranslatedString | undefined>();
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const [value, setValue] = useState("");
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const [show, setShow] = useState<"canvas" | "video" | "nothing">("nothing");
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const { i18n } = useTranslationContext();
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function onChange(str: string) {
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if (!!str) {
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if (!str.startsWith("taler://")) {
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setError(
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i18n.str`URI is not valid. Taler URI should start with "taler://"`,
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);
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} else if (classifyTalerUri(str) === TalerUriType.Unknown) {
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setError(i18n.str`Unknown type of Taler URI`);
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} else {
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setError(undefined);
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}
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} else {
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setError(undefined);
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}
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setValue(str);
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}
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async function startVideo() {
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if (!videoRef.current || !canvasRef.current) {
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return;
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}
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const video = videoRef.current;
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if (!video || !video.played) return;
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const stream = await navigator.mediaDevices.getUserMedia({
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video: { facingMode: "environment" },
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audio: false,
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});
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setShow("video");
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setError(undefined);
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video.srcObject = stream;
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await video.play();
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await waitUntilReady(video);
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try {
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const code = await createCanvasFromVideo(video, canvasRef.current);
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if (code) {
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onChange(code);
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setShow("canvas");
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}
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stream.getTracks().forEach((e) => {
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e.stop();
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});
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} catch (error) {
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setError(i18n.str`something unexpected happen: ${error}`);
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}
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}
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async function onFileRead(fileContent: string) {
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if (!canvasRef.current) {
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return;
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}
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setShow("nothing");
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setError(undefined);
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try {
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const code = await createCanvasFromFile(fileContent, canvasRef.current);
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if (code) {
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onChange(code);
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setShow("canvas");
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} else {
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setError(i18n.str`Could not found a QR code in the file`);
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}
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} catch (error) {
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setError(i18n.str`something unexpected happen: ${error}`);
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}
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}
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const active = value === "";
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return (
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<Container>
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<section>
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<h1>
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<i18n.Translate>
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Scan a QR code or enter taler:// URI below
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</i18n.Translate>
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</h1>
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<p>
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<TextField
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label="Taler URI"
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variant="standard"
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fullWidth
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value={value}
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onChange={onChange}
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/>
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</p>
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<Grid container justifyContent="space-around" columns={2}>
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<Grid item xs={2}>
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<p>{error && <Alert severity="error">{error}</Alert>}</p>
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</Grid>
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<Grid item xs={1}>
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{!active && (
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<Button
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variant="contained"
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onClick={async () => {
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setShow("nothing");
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onChange("");
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}}
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color="error"
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>
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<i18n.Translate>Clear</i18n.Translate>
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</Button>
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)}
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</Grid>
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<Grid item xs={1}>
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{value && (
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<Button
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disabled={!!error}
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variant="contained"
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color="success"
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onClick={async () => onDetected(value)}
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>
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<i18n.Translate>Open</i18n.Translate>
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</Button>
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)}
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</Grid>
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<Grid item xs={1}>
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<InputFile onChange={onFileRead}>Read QR from file</InputFile>
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</Grid>
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<Grid item xs={1}>
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<p>
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<Button variant="contained" onClick={startVideo}>
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Use Camera
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</Button>
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</p>
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</Grid>
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</Grid>
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</section>
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<div>
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<video
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ref={videoRef}
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style={{ display: show === "video" ? "unset" : "none" }}
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playsInline={true}
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/>
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<canvas
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id="este"
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class={QrCanvas}
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ref={canvasRef}
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style={{ display: show === "canvas" ? "unset " : "none" }}
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/>
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</div>
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</Container>
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);
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}
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@ -574,6 +574,7 @@ importers:
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date-fns: ^2.29.2
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esbuild: ^0.15.13
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history: 4.10.1
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jsqr: ^1.4.0
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mocha: ^9.2.0
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nyc: ^15.1.0
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polished: ^4.1.4
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@ -581,7 +582,7 @@ importers:
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preact-cli: ^3.3.5
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preact-render-to-string: ^5.1.19
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preact-router: 3.2.1
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qr-scanner: ^1.4.1
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qr-scanner: 1.4.2
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qrcode-generator: ^1.4.4
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rimraf: ^3.0.2
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tslib: ^2.4.0
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@ -591,9 +592,10 @@ importers:
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'@gnu-taler/taler-wallet-core': link:../taler-wallet-core
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date-fns: 2.29.3
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history: 4.10.1
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jsqr: 1.4.0
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preact: 10.11.3
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preact-router: 3.2.1_preact@10.11.3
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qr-scanner: 1.4.1
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qr-scanner: 1.4.2
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qrcode-generator: 1.4.4
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tslib: 2.4.0
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devDependencies:
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@ -10683,6 +10685,10 @@ packages:
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verror: 1.10.0
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dev: true
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|
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/jsqr/1.4.0:
|
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resolution: {integrity: sha512-dxLob7q65Xg2DvstYkRpkYtmKm2sPJ9oFhrhmudT1dZvNFFTlroai3AWSpLey/w5vMcLBXRgOJsbXpdN9HzU/A==}
|
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dev: false
|
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|
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/jssha/3.3.0:
|
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resolution: {integrity: sha512-w9OtT4ALL+fbbwG3gw7erAO0jvS5nfvrukGPMWIAoea359B26ALXGpzy4YJSp9yGnpUvuvOw1nSjSoHDfWSr1w==}
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dev: true
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@ -13210,8 +13216,8 @@ packages:
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engines: {node: '>=0.6.0', teleport: '>=0.2.0'}
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dev: true
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|
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/qr-scanner/1.4.1:
|
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resolution: {integrity: sha512-xiR90NONHTfTwaFgW/ihlqjGMIZg6ExHDOvGQRba1TvV+WVw7GoDArIOt21e+RO+9WiO4AJJq+mwc5f4BnGH3w==}
|
||||
/qr-scanner/1.4.2:
|
||||
resolution: {integrity: sha512-kV1yQUe2FENvn59tMZW6mOVfpq9mGxGf8l6+EGaXUOd4RBOLg7tRC83OrirM5AtDvZRpdjdlXURsHreAOSPOUw==}
|
||||
dependencies:
|
||||
'@types/offscreencanvas': 2019.7.0
|
||||
dev: false
|
||||
|
||||
Loading…
Reference in New Issue
Block a user