tryDecodeChatGptCredentials function

ChatGptOAuthCredentials? tryDecodeChatGptCredentials(String value)

Decodes value into ChatGptOAuthCredentials, or null when it is not credential-shaped at all — a plain Bearer access token (issue #1704), a partial JSON object, or garbage. A partial JSON object that at least names its access_token degrades to that bearer (no refresh); a plain string is used verbatim. Callers treat null as raw-bearer use (no proactive/reactive refresh) instead of failing the turn.

Implementation

ChatGptOAuthCredentials? tryDecodeChatGptCredentials(String value) {
  try {
    return ChatGptOAuthCredentials.decode(value);
  } on FormatException {
    final Object? decoded;
    try {
      decoded = jsonDecode(value);
    } on Object {
      return null;
    }
    if (decoded is Map) {
      final accessToken = decoded['access_token'];
      if (accessToken is String && accessToken.isNotEmpty) {
        return ChatGptOAuthCredentials(
          accessToken: accessToken,
          refreshToken: '',
          idToken: '',
        );
      }
    }
    return null;
  }
}