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58c051a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | "use client";
import { useCallback, useEffect, useId, useRef, useState } from "react";
type Props = {
active: boolean;
onClose: () => void;
onDecoded: (text: string) => void;
};
export function BarcodeCameraScanner({ active, onClose, onDecoded }: Props) {
const readerId = useId().replace(/:/g, "");
const readerElementId = `barcode-camera-${readerId}`;
const scannerRef = useRef<import("html5-qrcode").Html5Qrcode | null>(null);
const onDecodedRef = useRef(onDecoded);
const lastRef = useRef<{ text: string; at: number }>({ text: "", at: 0 });
const [error, setError] = useState<string | null>(null);
const [starting, setStarting] = useState(false);
onDecodedRef.current = onDecoded;
const stopScanner = useCallback(async () => {
const s = scannerRef.current;
scannerRef.current = null;
if (!s) return;
try {
if (s.isScanning) await s.stop();
} catch {
/* ignore */
}
try {
s.clear();
} catch {
/* ignore */
}
}, []);
useEffect(() => {
if (!active) {
void stopScanner();
setError(null);
setStarting(false);
return;
}
let cancelled = false;
setStarting(true);
setError(null);
void (async () => {
try {
const { Html5Qrcode, Html5QrcodeSupportedFormats } = await import("html5-qrcode");
if (cancelled) return;
await stopScanner();
if (cancelled) return;
await new Promise<void>((r) => requestAnimationFrame(() => r()));
if (cancelled) return;
if (!document.getElementById(readerElementId)) {
if (!cancelled) setError("Scanner view not ready");
return;
}
const formats = [
Html5QrcodeSupportedFormats.EAN_13,
Html5QrcodeSupportedFormats.EAN_8,
Html5QrcodeSupportedFormats.CODE_128,
Html5QrcodeSupportedFormats.UPC_A,
Html5QrcodeSupportedFormats.UPC_E,
Html5QrcodeSupportedFormats.CODE_39,
Html5QrcodeSupportedFormats.CODE_93,
Html5QrcodeSupportedFormats.ITF,
Html5QrcodeSupportedFormats.CODABAR,
Html5QrcodeSupportedFormats.QR_CODE
];
const html5 = new Html5Qrcode(readerElementId, {
formatsToSupport: formats,
useBarCodeDetectorIfSupported: true,
verbose: false
});
if (cancelled) {
try {
html5.clear();
} catch {
/* ignore */
}
return;
}
scannerRef.current = html5;
await html5.start(
{ facingMode: "environment" },
{
fps: 8,
qrbox: (viewfinderWidth: number, viewfinderHeight: number) => {
const w = Math.min(320, Math.floor(viewfinderWidth * 0.92));
const h = Math.min(220, Math.floor(viewfinderHeight * 0.42));
return { width: w, height: h };
},
aspectRatio: 1.777777778,
videoConstraints: { facingMode: { ideal: "environment" } }
},
(decodedText) => {
const now = Date.now();
if (decodedText === lastRef.current.text && now - lastRef.current.at < 2200) return;
lastRef.current = { text: decodedText, at: now };
onDecodedRef.current(decodedText);
},
() => undefined
);
} catch (e) {
if (!cancelled) {
setError(
e instanceof Error
? e.message
: "Could not open camera. Allow camera permission and use HTTPS or localhost."
);
}
} finally {
if (!cancelled) setStarting(false);
}
})();
return () => {
cancelled = true;
void stopScanner();
};
}, [active, stopScanner, readerElementId]);
if (!active) return null;
return (
<div className="scanCamera">
<div className="scanCamera__toolbar">
<span className="scanCamera__label">Point at barcode</span>
<button
type="button"
className="scanCamera__close"
onClick={() => {
void stopScanner().then(onClose);
}}
>
Close camera
</button>
</div>
<div id={readerElementId} className="scanCamera__viewport" />
{starting ? <p className="scanCamera__hint">Starting camera…</p> : null}
{error ? <p className="scanCamera__err">{error}</p> : null}
</div>
);
}
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