Function LoadFromConfig

src/settings.cpp:1375–1466

* Load the values from the configuration files * @param startup Load the minimal amount of the configuration to "bootstrap" the blitter and such. */

 * @param startup Load the minimal amount of the configuration to "bootstrap" the blitter and such.
 */
void LoadFromConfig(bool startup)
{
	ConfigIniFile generic_ini(_config_file);
	ConfigIniFile private_ini(_private_file);
	ConfigIniFile secrets_ini(_secrets_file);
	ConfigIniFile favs_ini(_favs_file);

	if (!startup) ResetCurrencies(false); // Initialize the array of currencies, without preserving the custom one

	IniFileVersion generic_version = LoadVersionFromConfig(generic_ini);

	if (startup) {
		GraphicsSetLoadConfig(generic_ini);
	}

	/* Before the split of private/secrets, we have to look in the generic for these settings. */
	if (generic_version < IFV_PRIVATE_SECRETS) {
		HandleSettingDescs(generic_ini, generic_ini, generic_ini, IniLoadSettings, IniLoadSettingList, startup);
	} else {
		HandleSettingDescs(generic_ini, private_ini, secrets_ini, IniLoadSettings, IniLoadSettingList, startup);
	}

	/* Load basic settings only during bootstrap, load other settings not during bootstrap */
	if (!startup) {
		if (generic_version < IFV_LINKGRAPH_SECONDS) {
			_settings_newgame.linkgraph.recalc_interval *= CalendarTime::SECONDS_PER_DAY;
			_settings_newgame.linkgraph.recalc_time     *= CalendarTime::SECONDS_PER_DAY;
		}

		/* Move use_relay_service from generic_ini to private_ini. */
		if (generic_version < IFV_NETWORK_PRIVATE_SETTINGS) {
			const IniGroup *network = generic_ini.GetGroup("network");
			if (network != nullptr) {
				const IniItem *use_relay_service = network->GetItem("use_relay_service");
				if (use_relay_service != nullptr) {
					if (use_relay_service->value == "never") {
						_settings_client.network.use_relay_service = UseRelayService::URS_NEVER;
					} else if (use_relay_service->value == "ask") {
						_settings_client.network.use_relay_service = UseRelayService::URS_ASK;
					} else if (use_relay_service->value == "allow") {
						_settings_client.network.use_relay_service = UseRelayService::URS_ALLOW;
					}
				}
			}
		}

		const IniItem *old_item;

		if (generic_version < IFV_GAME_TYPE && IsConversionNeeded(generic_ini, "network", "server_advertise", "server_game_type", &old_item)) {
			auto old_value = BoolSettingDesc::ParseSingleValue(*old_item->value);
			_settings_client.network.server_game_type = old_value.value_or(false) ? SERVER_GAME_TYPE_PUBLIC : SERVER_GAME_TYPE_LOCAL;
		}

		if (generic_version < IFV_AUTOSAVE_RENAME && IsConversionNeeded(generic_ini, "gui", "autosave", "autosave_interval", &old_item)) {
			static constexpr std::initializer_list<std::string_view> _old_autosave_interval{"off"sv, "monthly"sv, "quarterly"sv, "half year"sv, "yearly"sv};
			auto old_value = OneOfManySettingDesc::ParseSingleValue(*old_item->value, _old_autosave_interval).value_or(-1);

			switch (old_value) {