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joplin/packages/app-mobile/components/CameraView/utils/useBarcodeScanner.ts

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import { useMemo, useState } from 'react';
interface ScannedData {
text: string;
timestamp: number;
}
interface BarcodeScanningResult {
type: string;
data: string;
}
export interface BarcodeScanner {
enabled: boolean;
onToggleEnabled: ()=> void;
onBarcodeScanned: (scan: BarcodeScanningResult)=> void;
lastScan: ScannedData|null;
}
const useBarcodeScanner = (): BarcodeScanner => {
const [lastScan, setLastScan] = useState<ScannedData|null>(null);
const [enabled, setEnabled] = useState(true);
return useMemo(() => {
return {
enabled,
onToggleEnabled: () => {
setEnabled(enabled => !enabled);
},
onBarcodeScanned: enabled ? (scanningResult: BarcodeScanningResult) => {
setLastScan({
text: scanningResult.data ?? 'null',
timestamp: performance.now(),
});
} : null,
lastScan,
};
}, [lastScan, enabled]);
};
export default useBarcodeScanner;