BlueWallet/helpers/scan-qr.ts

import { Platform } from 'react-native';
import { check, request, PERMISSIONS, RESULTS } from 'react-native-permissions';

/**
 * Helper function that navigates to ScanQR screen, and returns promise that will resolve with the result of a scan,
 * and then navigates back. If QRCode scan was closed, promise resolves to null.
 *
 * @param navigateFunc {function}
 * @param currentScreenName {string}
 * @param showFileImportButton {boolean}
 *
 * @return {Promise<string>}
 */
function scanQrHelper(
  navigateFunc: (scr: string, params?: any) => void,
  currentScreenName: string,
  showFileImportButton = true,
): Promise<string | null> {
  return requestCameraAuthorization().then(() => {
    return new Promise(resolve => {
      const params = {
        showFileImportButton: Boolean(showFileImportButton),
        onBarScanned: (data: any) => {},
        onDismiss: () => {},
      };

      params.onBarScanned = function (data: any) {
        setTimeout(() => resolve(data.data || data), 1);
        navigateFunc(currentScreenName);
      };

      params.onDismiss = function () {
        setTimeout(() => resolve(null), 1);
      };

      navigateFunc('ScanQRCodeRoot', {
        screen: 'ScanQRCode',
        params,
      });
    })}
  );
}

const isCameraAuthorizationStatusGranted = async () => {
  const status = await check(Platform.OS === 'android' ? PERMISSIONS.ANDROID.CAMERA : PERMISSIONS.IOS.CAMERA);
  return status === RESULTS.GRANTED;
};

const requestCameraAuthorization = () => {
  return request(Platform.OS === 'android' ? PERMISSIONS.ANDROID.CAMERA : PERMISSIONS.IOS.CAMERA);
};

export { scanQrHelper, isCameraAuthorizationStatusGranted, requestCameraAuthorization };