Function CreateObjectFromJson

src/openrct2/object/ObjectFactory.cpp:530–614

    }

    std::unique_ptr<Object> CreateObjectFromJson(
        json_t& jRoot, const IFileDataRetriever* fileRetriever, bool loadImageTable, const std::string_view path)
    {
        if (!jRoot.is_object())
        {
            throw std::runtime_error("Object JSON root was not an object");
        }

        LOG_VERBOSE("CreateObjectFromJson(...)");

        std::unique_ptr<Object> result;

        auto lookup = kObjectTypeMap.find(Json::GetString(jRoot["objectType"]));
        if (lookup != kObjectTypeMap.end())
        {
            auto objectType = lookup->second;
            auto id = Json::GetString(jRoot["id"]);

            // Base audio files are renamed to a common, virtual name so asset packs can override it correctly.
            const bool isRCT2BaseAudio = id == Audio::AudioObjectIdentifiers::kRCT2Base && !isUsingClassic();
            const bool isRCTCBaseAudio = id == Audio::AudioObjectIdentifiers::kRCTCBase && isUsingClassic();
            if (isRCT2BaseAudio || isRCTCBaseAudio)
            {
                id = Audio::AudioObjectIdentifiers::kRCT2;
            }

            auto version = VersionTuple(Json::GetString(jRoot["version"]));
            ObjectEntryDescriptor descriptor;
            auto originalId = Json::GetString(jRoot["originalId"]);
            if (originalId.length() == 8 + 1 + 8 + 1 + 8)
            {
                auto originalName = originalId.substr(9, 8);

                RCTObjectEntry entry = {};
                entry.flags = std::stoul(originalId.substr(0, 8), nullptr, 16);
                entry.checksum = std::stoul(originalId.substr(18, 8), nullptr, 16);
                auto minLength = std::min<size_t>(8, originalName.length());
                std::memcpy(entry.name, originalName.c_str(), minLength);

                // Some bad objects try to override different types
                if (entry.GetType() != objectType)
                {
                    LOG_ERROR(
                        "Object \"%s\" has invalid originalId set \"%s\". Ignoring override.", id.c_str(), originalId.c_str());
                    descriptor = ObjectEntryDescriptor(objectType, id);
                }
                else
                {
                    descriptor = ObjectEntryDescriptor(entry);
                }
            }
            else
            {
                descriptor = ObjectEntryDescriptor(objectType, id);
            }
            descriptor.Version = version;
            result = CreateObject(objectType);
            result->SetVersion(version);