signIn method

@override Future<AuthResult> signIn()

구글 로그인 실행

Implementation

@override
Future<AuthResult> signIn() async {
  try {
    if (!_initialized) await initialize();

    // 먼저 조용한 로그인 시도
    var account =
        await GoogleSignIn.instance.attemptLightweightAuthentication();

    // 실패하면 전체 로그인 플로우
    if (account == null) {
      if (!GoogleSignIn.instance.supportsAuthenticate()) {
        return ErrorMapper.toFailure(
          AuthProvider.google,
          KAuthError.fromCode(ErrorCodes.platformNotSupported),
        );
      }
      account = await GoogleSignIn.instance.authenticate();
    }

    return _buildResult(account);
  } on GoogleSignInException catch (e) {
    return ErrorMapper.toFailure(AuthProvider.google, ErrorMapper.google(e));
  } catch (e) {
    return ErrorMapper.handleException(
      AuthProvider.google,
      e,
      operation: '로그인',
      errorCode: ErrorCodes.googleSignInFailed,
    );
  }
}