biometric_service.dart

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import 'package:local_auth/local_auth.dart';
 
abstract class BiometricService {
  Future<List<BiometricType>> getAvailableBiometrics();
  Future<bool> authenticate(BiometricType type, String reason);
  Future<bool> hasFingerprintSupport();
}
 
class LocalBiometricService implements BiometricService {
  LocalBiometricService();
 
  final _localAuth = LocalAuthentication();
 
  @override
  Future<List<BiometricType>> getAvailableBiometrics() async {
    try {
      return await _localAuth.getAvailableBiometrics();
    } catch (e) {
      return [];
    }
  }
 
  @override
  Future<bool> authenticate(BiometricType type, String reason) async {
    try {
      return await _localAuth.authenticate(
        localizedReason: reason,
        options: const AuthenticationOptions(stickyAuth: true),
      );
    } catch (e) {
      return false;
    }
  }
 
  @override
  Future<bool> hasFingerprintSupport() async {
    try {
      final biometrics = await getAvailableBiometrics();
      return biometrics.contains(BiometricType.fingerprint) || biometrics.contains(BiometricType.strong);
    } catch (e) {
      return false;
    }
  }
}