Function ReadRegionDataImpl

generator/region_meta.cpp:30–144

namespace feature
{
bool ReadRegionDataImpl(std::string const & countryName, RegionData & data)
{
  /// @todo How LEAP_SPEEDS_FILE was generated before? It's always absent now.
  if (Platform::IsFileExistsByFullPath(LEAP_SPEEDS_FILE))
  {
    try
    {
      auto crossMwmDataReader = GetPlatform().GetReader(LEAP_SPEEDS_FILE);
      std::string crossMwmDataBuffer;
      crossMwmDataReader->ReadAsString(crossMwmDataBuffer);
      base::Json crossMwmData(crossMwmDataBuffer.data());

      json_t const * crossMwmJsonData = nullptr;
      FromJSONObjectOptionalField(crossMwmData.get(), countryName, crossMwmJsonData);
      if (crossMwmJsonData)
      {
        double leapSpeed = FromJSONObject<double>(crossMwmJsonData, "leapspeed");
        if (leapSpeed > 0.0)
          data.SetLeapWeightSpeed(leapSpeed);
      }
    }
    catch (FileAbsentException const & e)
    {
      LOG(LERROR, ("Error missing file", LEAP_SPEEDS_FILE, ":", e.Msg()));
      return false;
    }
    catch (Reader::Exception const & e)
    {
      LOG(LERROR, ("Error reading", LEAP_SPEEDS_FILE, ":", e.Msg()));
      return false;
    }
    catch (base::Json::Exception const & e)
    {
      LOG(LERROR, ("Error parsing JSON in", LEAP_SPEEDS_FILE, ":", e.Msg()));
      return false;
    }
  }

  try
  {
    auto reader = GetPlatform().GetReader(COUNTRIES_META_FILE);
    std::string buffer;
    reader->ReadAsString(buffer);
    base::Json root(buffer.data());

    json_t const * jsonData = nullptr;
    FromJSONObjectOptionalField(root.get(), countryName, jsonData);
    if (!jsonData)
      return false;

    std::vector<std::string> languages;
    FromJSONObjectOptionalField(jsonData, "languages", languages);
    if (!languages.empty())
      data.SetLanguages(languages);

    std::string driving;
    FromJSONObjectOptionalField(jsonData, "driving", driving);
    if (driving == "l" || driving == "r")