app.plugin.js

const {
  AndroidConfig,
  withInfoPlist,
  withEntitlementsPlist,
} = require('@expo/config-plugins');

const NFC_READER = 'Interact with nearby NFC devices';

function withIosPermission(c, props = {}) {
  const {nfcPermission} = props;
  return withInfoPlist(c, (config) => {
    // https://developer.apple.com/documentation/bundleresources/information_property_list/nfcreaderusagedescription?language=objc
    config.modResults.NFCReaderUsageDescription =
      nfcPermission ||
      config.modResults.NFCReaderUsageDescription ||
      NFC_READER;
    return config;
  });
}

function addValuesToArray(obj, key, values) {
  if (!Array.isArray(values) || !values.length) {
    return obj;
  }
  if (!Array.isArray(obj[key])) {
    obj[key] = [];
  }
  // Add the required values
  obj[key].push(...values);

  // Remove duplicates
  obj[key] = [...new Set(obj[key])];

  // Prevent adding empty arrays to Info.plist or *.entitlements
  if (!obj[key].length) {
    delete obj[key];
  }

  return obj;
}

function withIosNfcEntitlement(c, {includeNdefEntitlement}) {
  return withEntitlementsPlist(c, (config) => {
    // Add the required formats
    let entitlements = ['NDEF', 'TAG']
    if (includeNdefEntitlement === false) {
      entitlements = ['TAG']
    }
    config.modResults = addValuesToArray(
      config.modResults,
      'com.apple.developer.nfc.readersession.formats',
      entitlements,
    );

    return config;
  });
}

function withIosNfcSelectIdentifiers(c, {selectIdentifiers}) {
  return withInfoPlist(c, (config) => {
    // Add the user defined identifiers
    config.modResults = addValuesToArray(
      config.modResults,
      // https://developer.apple.com/documentation/bundleresources/information_property_list/select-identifiers
      'com.apple.developer.nfc.readersession.iso7816.select-identifiers',
      selectIdentifiers || [],
    );

    return config;
  });
}

function withIosNfcSystemCodes(c, {systemCodes}) {
  return withInfoPlist(c, (config) => {
    // Add the user defined identifiers
    config.modResults = addValuesToArray(
      config.modResults,
      // https://developer.apple.com/documentation/bundleresources/information_property_list/systemcodes
      'com.apple.developer.nfc.readersession.felica.systemcodes',
      systemCodes || [],
    );

    return config;
  });
}

function withNfc(config, props = {}) {
  const {nfcPermission, selectIdentifiers, systemCodes, includeNdefEntitlement} = props;
  config = withIosNfcEntitlement(config, {includeNdefEntitlement});
  config = withIosNfcSelectIdentifiers(config, {selectIdentifiers});
  config = withIosNfcSystemCodes(config, {systemCodes});

  // We start to support Android 12 from v3.11.1, and you will need to update compileSdkVersion to 31,
  // otherwise the build will fail:
  config = AndroidConfig.Version.withBuildScriptExtMinimumVersion(config, {
    name: 'compileSdkVersion',
    minVersion: 31,
  });

  if (nfcPermission !== false) {
    config = withIosPermission(config, props);
    config = AndroidConfig.Permissions.withPermissions(config, [
      'android.permission.NFC',
    ]);
  }
  return config;
}

module.exports = withNfc;