Method GetModuleNameForLuaAircraft

src/games/DCSWorld.cpp:25–84

namespace OpenKneeboard {

std::string DCSWorld::GetModuleNameForLuaAircraft(const std::string& luaName) {
  using mapping_t = std::unordered_map<std::string, std::string>;
  static std::optional<mapping_t> sMapping;
  if (sMapping) {
    if (sMapping->contains(luaName)) {
      return sMapping->at(luaName);
    }
    return luaName;
  }

  const std::filesystem::path fileName = "DCS-Aircraft-Mapping.json";
  const std::vector<std::filesystem::path> dirs = {
    // User-override
    Filesystem::GetSettingsDirectory(),
    // As-installed
    Filesystem::GetImmutableDataDirectory(),
  };

  dprint("Loading DCS aircraft mapping...");
  for (const auto& dir: dirs) {
    const auto path = dir / fileName;
    dprint("Trying {}...", path);
    if (!std::filesystem::exists(path)) {
      dprint("... not found.");
      continue;
    }

    dprint("... reading JSON.");

    try {
      std::ifstream f(path.c_str());
      nlohmann::json json;
      f >> json;
      mapping_t data = json;
      sMapping = std::move(data);
      dprint("... done.");
      break;
    } catch (const nlohmann::json::exception& e) {
      dprint("... JSON exception: {}", e.what());
    } catch (const std::exception& e) {
      dprint("... standard exception: {}", e.what());
    }
  }

  if (!sMapping) {
    dprint("Failed to load any mapping file.");
    sMapping = mapping_t {};
  }

  if (sMapping && sMapping->contains(luaName)) {
    return sMapping->at(luaName);
  }

  dprint("Aircraft mapping:");
  for (const auto& [key, value]: *sMapping) {
    dprint("- {} -> {}", key, value);
  }