expo-camera/plugin/src/withCamera.ts

A React component that renders a preview for the device's either front or back camera. Camera's parameters like zoom, auto focus, white balance and flash mode are adjustable. With expo-camera, one can also take photos and record videos that are saved to t

import {
  AndroidConfig,
  type ConfigPlugin,
  createRunOncePlugin,
  IOSConfig,
  withGradleProperties,
  withPodfileProperties,
} from 'expo/config-plugins';

const pkg = require('../../package.json');

const CAMERA_USAGE = 'Allow $(PRODUCT_NAME) to access your camera';
const MICROPHONE_USAGE = 'Allow $(PRODUCT_NAME) to access your microphone';
const BARCODE_SCANNER_KEY = 'expo.camera.barcode-scanner-enabled';

export type Props = {
  /**
   * A string to set the `NSCameraUsageDescription` permission message.
   * @default "Allow $(PRODUCT_NAME) to access your camera"
   * @platform ios
   */
  cameraPermission?: string | false;
  /**
   * A string to set the `NSMicrophoneUsageDescription` permission message.
   * @default "Allow $(PRODUCT_NAME) to access your microphone"
   * @platform ios
   */
  microphonePermission?: string | false;
  /**
   * Whether to enable the `RECORD_AUDIO` permission on Android.
   * @default true
   * @platform android
   */
  recordAudioAndroid?: boolean;
  /**
   * Whether to enable barcode scanning support. Disabling this reduces app size.
   * @default true
   */
  barcodeScannerEnabled?: boolean;
};

const withCamera: ConfigPlugin<Props | void> = (
  config,
  {
    cameraPermission,
    microphonePermission,
    recordAudioAndroid = true,
    barcodeScannerEnabled = true,
  } = {}
) => {
  IOSConfig.Permissions.createPermissionsPlugin({
    NSCameraUsageDescription: CAMERA_USAGE,
    NSMicrophoneUsageDescription: MICROPHONE_USAGE,
  })(config, {
    NSCameraUsageDescription: cameraPermission,
    NSMicrophoneUsageDescription: microphonePermission,
  });

  config = withPodfileProperties(config, (config) => {
    if (barcodeScannerEnabled === false) {
      config.modResults[BARCODE_SCANNER_KEY] = 'false';
    } else {
      delete config.modResults[BARCODE_SCANNER_KEY];
    }
    return config;
  });

  config = withGradleProperties(config, (config) => {
    config.modResults = AndroidConfig.BuildProperties.updateAndroidBuildProperty(
      config.modResults,
      BARCODE_SCANNER_KEY,
      barcodeScannerEnabled === false ? 'false' : null,
      { removePropWhenValueIsNull: true }
    );
    return config;
  });

  config = AndroidConfig.Permissions.withPermissions(
    config,
    [
      'android.permission.CAMERA',
      // Optional
      recordAudioAndroid && 'android.permission.RECORD_AUDIO',
    ].filter(Boolean) as string[]
  );

  return config;
};

export default createRunOncePlugin(withCamera, pkg.name, pkg.version);