Function useQRCode

src/index.tsx:270–332

({
  value,
  level,
  minVersion,
  includeMargin,
  marginSize,
  imageSettings,
  size,
  boostLevel,
}: {
  value: string | string[];
  level: ErrorCorrectionLevel;
  minVersion: number;
  includeMargin: boolean;
  marginSize?: number;
  imageSettings?: ImageSettings;
  size: number;
  boostLevel?: boolean;
})

}

function useQRCode({
  value,
  level,
  minVersion,
  includeMargin,
  marginSize,
  imageSettings,
  size,
  boostLevel,
}: {
  value: string | string[];
  level: ErrorCorrectionLevel;
  minVersion: number;
  includeMargin: boolean;
  marginSize?: number;
  imageSettings?: ImageSettings;
  size: number;
  boostLevel?: boolean;
}) {
  let qrcode = React.useMemo(() => {
    const values = Array.isArray(value) ? value : [value];
    const segments = values.reduce<qrcodegen.QrSegment[]>((accum, v) => {
      accum.push(...qrcodegen.QrSegment.makeSegments(v));
      return accum;
    }, []);
    return qrcodegen.QrCode.encodeSegments(
      segments,
      ERROR_LEVEL_MAP[level],
      minVersion,
      undefined,
      undefined,
      boostLevel
    );
  }, [value, level, minVersion, boostLevel]);

  const {cells, margin, numCells, calculatedImageSettings} =
    React.useMemo(() => {
      let cells = qrcode.getModules();

      const margin = getMarginSize(includeMargin, marginSize);
      const numCells = cells.length + margin * 2;
      const calculatedImageSettings = getImageSettings(
        cells,
        size,
        margin,
        imageSettings
      );
      return {
        cells,
        margin,
        numCells,
        calculatedImageSettings,
      };
    }, [qrcode, size, imageSettings, includeMargin, marginSize]);

  return {
    qrcode,
    margin,