app-starlock/lib/talk/startChart/entity/heartbeat_response.dart

class HeartbeatResponse {
  int? statusCode;
  int? nextPingTime;

  HeartbeatResponse({
    this.statusCode,
    this.nextPingTime,
  });

  factory HeartbeatResponse.fromBytes(List<int> bytes) {
    final message = HeartbeatResponse();
    int offset = 0;

    // Set default value for statusCode
    message.statusCode = 0; // 或者其他默认值

    // Check if the entire array has at least 2 bytes for nextPingTime
    if (bytes.length < 2) {
      throw FormatException("Insufficient data for HeartbeatResponse");
    }

    // nextPingTime (2 bytes, little-endian)
    if (bytes.length - offset >= 2) {
      message.nextPingTime = (bytes[offset + 1] << 8) | bytes[offset];
      offset += 2;
    } else {
      throw FormatException("Invalid nextPingTime length");
    }

    return message;
  }

  @override
  String toString() {
    return 'HeartbeatResponse{statusCode: $statusCode, nextPingTime: $nextPingTime}';
  }
}