authenticate method

Implementation

Future<String> authenticate({
  required String authorizationUrl,
  required String callbackUrlScheme,
}) async {
  try {
    // Perform web authentication with timeout options
    // The timeout ensures the Chrome Custom Tab closes automatically
    // and prevents indefinite waiting for user authentication
    final result = await FlutterWebAuth2.authenticate(
      url: authorizationUrl,
      callbackUrlScheme: callbackUrlScheme,
      options: const FlutterWebAuth2Options(
        timeout: 120, // 2 minutes - gives users time to enter credentials
      ),
    );

    // Extract authorization code from callback URL
    final code = _extractAuthorizationCode(result);
    if (code == null) {
      throw FrappeNetworkException(
        'No authorization code found in callback URL',
      );
    }

    return code;
  } catch (e) {
    if (e is FrappeAuthException) {
      rethrow;
    }

    // Handle flutter_web_auth_2 specific errors
    if (e.toString().contains('User cancelled')) {
      throw FrappeUserCancelledException(
        'User cancelled the authentication process',
      );
    }

    if (e.toString().contains('RESULT_CANCELED')) {
      throw FrappeUserCancelledException('Authentication was cancelled');
    }

    // Generic authentication error
    throw FrappeNetworkException(
      'Authentication failed: ${e.toString()}',
      originalError: e,
    );
  }
}