getWriteLength method

@override int getWriteLength()

Gets the length of the write data when WriteTo will be called.

Implementation

@override
int getWriteLength() {
  var headerLength = 0;
  final enc = MqttEncoding();
  headerLength += enc.getByteCount(topicName);
  if (header!.qos == MqttQos.atLeastOnce ||
      header!.qos == MqttQos.exactlyOnce) {
    headerLength += 2;
  }
  return headerLength;
}