Function CreateCsvFile

lib/mdflib/mdfviewer/src/mdfdocument.cpp:38–85

* Creates a CSV file using sample observers as input. * * The CSV file is created in the applications temporary directory and the file name is unique. * Note that if the observer list only have one channel, the file will add the samples as first column. * The same applies if the first channel not is a master channel. * @param list Sample observer list containing samples. * @return Full path

 * @return Full path (ANSI coding) to the created file or an empty string if the function fails.
 */
std::string CreateCsvFile(const mdf::ChannelObserverList& list) {
  if (list.empty()) {
    LOG_ERROR() << "No observers in the list.";
    return "";
  }

  const auto& app = wxGetApp();
  std::string csv_file;
  try {
    std::filesystem::path temp_file(app.GetMyTempDir());
    const auto unique  = boost::filesystem::unique_path();
    temp_file.append(unique.string());
    temp_file.replace_extension(".csv");
    csv_file = temp_file.generic_string();
  } catch (const std::exception& error) {
    LOG_ERROR() << "Failed to create the CSV file. Error: " << error.what();
  }

 util::plot::CsvWriter csv(csv_file);

  const bool master = list.size() > 1 && list[0]->IsMaster();

  // Add the header first
  if (!master) {
    // First column is sample number
    csv.AddColumnHeader("Sample", "");
  }
  for (const auto& channel : list) {
     csv.AddColumnHeader(channel->Name(),channel->Unit());
  }
  csv.AddRow();
  // Add the samples
  for (size_t sample = 0; sample < list[0]->NofSamples(); ++sample) {
    // Add the sample number first
    if (!master) {
      // First column is sample number
      csv.AddColumnValue(sample);
    }
    for (const auto& channel : list) {
      std::string value;
      const bool valid  = channel->GetEngValue(sample, value); // Note that we may lose some digits here
      csv.AddColumnValue(valid ? value : "");
    }
    csv.AddRow();
  }

 return csv_file;
}

std::string CreateGnuPlotFile(const mdf::ChannelObserverList& list, const std::string& csv_file, const std::string& title) {
  if (list.empty() || csv_file.empty()) {