Function createIndex

src/OpenLoco/src/Objects/ObjectIndex.cpp:466–495

0x0047118B

    // 0x0047118B
    static void createIndex(const ObjectFoldersState& currentState)
    {
        Input::processMessagesMini();
        const auto progressString = _isFirstTime ? StringIds::starting_for_the_first_time : StringIds::checking_object_files;
        Ui::ProgressBar::begin(progressString);

        // Reset
        reloadAll();
        _installedObjectList.clear();

        // Create new index by iterating all DAT files and processing
        IndexHeader header{};
        header.version = kCurrentIndexVersion;
        const auto vanillaObjectPath = Environment::getPathNoWarning(Environment::PathId::vanillaObjects);
        addObjectsInFolder(vanillaObjectPath, false, currentState.vanillaInstall.numObjects);
        const auto objectPath = Environment::getPathNoWarning(Environment::PathId::objects);
        addObjectsInFolder(objectPath, true, currentState.install.numObjects);
        const auto customObjectPath = Environment::getPathNoWarning(Environment::PathId::customObjects);
        addObjectsInFolder(customObjectPath, true, currentState.customObjects.numObjects);
        std::ranges::sort(_installedObjectList, {}, [](const auto& entry) { return entry._name; });

        // New index creation completed. Reset and save result.
        reloadAll();
        header.fileSize = 0;
        header.numObjects = static_cast<uint32_t>(_installedObjectList.size());
        header.state = currentState;
        saveIndex(header);

        Ui::ProgressBar::end();
    }

    static bool tryLoadIndex(const ObjectFoldersState& currentState)
    {