parseAuthorizationCredentialAppleIDFromDeeplink function

AuthorizationCredentialAppleID parseAuthorizationCredentialAppleIDFromDeeplink(Uri deeplink)

Implementation

AuthorizationCredentialAppleID parseAuthorizationCredentialAppleIDFromDeeplink(
  Uri deeplink,
) {
  if (deeplink.queryParameters.containsKey('error')) {
    /// In case an error occured during the web flow, the URL will have an `error` parameter.
    ///
    /// The only error code that might be returned is `user_cancelled_authorize`,
    /// which indicates that the user clicked the `Cancel` button during the web flow.
    ///
    /// https://developer.apple.com/documentation/sign_in_with_apple/sign_in_with_apple_js/incorporating_sign_in_with_apple_into_other_platforms
    if (deeplink.queryParameters['error'] == 'user_cancelled_authorize') {
      throw const SignInWithAppleAuthorizationException(
        code: AuthorizationErrorCode.canceled,
        message: 'User canceled authorization',
      );
    }
  }

  final user = deeplink.queryParameters.containsKey('user')
      ? json.decode(deeplink.queryParameters['user'] as String)
          as Map<String, dynamic>
      : null;
  final name = user != null ? user['name'] as Map<String, dynamic>? : null;

  final authorizationCode = deeplink.queryParameters['code'];
  if (authorizationCode == null) {
    throw const SignInWithAppleAuthorizationException(
      code: AuthorizationErrorCode.invalidResponse,
      message:
          'parseAuthorizationCredentialAppleIDFromDeeplink: No `code` query parameter set)',
    );
  }

  return AuthorizationCredentialAppleID(
    authorizationCode: authorizationCode,
    email: user?['email'] as String?,
    givenName: name?['firstName'] as String?,
    familyName: name?['lastName'] as String?,
    userIdentifier: null,
    identityToken: deeplink.queryParameters['id_token'],
    state: deeplink.queryParameters['state'],
  );
}