Method resolveAssetLoader

valdi/src/valdi/runtime/Resources/AssetLoaderManager.cpp:78–118

}

Ref<AssetLoader> AssetLoaderManager::resolveAssetLoader(const StringBox& urlScheme,
                                                        snap::valdi_core::AssetOutputType outputType) {
    std::lock_guard<Mutex> mutex(_mutex);

    // Could change later to a map for potentially faster query performance.
    const RegisteredAssetLoader* bytesAssetLoaderCandidate = nullptr;

    size_t i = _entries.size();
    while (i > 0) {
        i--;
        const auto& entry = _entries[i];
        if (entry.urlScheme == urlScheme) {
            if (entry.outputType == outputType && canUseRegisteredAssetLoader(entry, bytesAssetLoaderCandidate)) {
                return entry.assetLoader;
            }

            if (entry.outputType == snap::valdi_core::AssetOutputType::Bytes && bytesAssetLoaderCandidate == nullptr) {
                bytesAssetLoaderCandidate = &entry;
            }
        }
    }

    if (outputType != snap::valdi_core::AssetOutputType::Bytes) {
        const auto& downloaderIt = _downloaderByScheme.find(urlScheme);
        if (downloaderIt != _downloaderByScheme.end()) {
            return tryCreateAssetLoaderFromFactory(
                urlScheme, outputType, /* sourceAssetLoader */ nullptr, downloaderIt->second, _entries.size());
        } else if (bytesAssetLoaderCandidate != nullptr) {
            auto sourceAssetLoader = bytesAssetLoaderCandidate->assetLoader;
            auto remoteDownloader = makeShared<AssetLoaderRemoteDownloaderAdapter>(sourceAssetLoader);

            return tryCreateAssetLoaderFromFactory(urlScheme,
                                                   outputType,
                                                   sourceAssetLoader,
                                                   remoteDownloader,
                                                   bytesAssetLoaderCandidate - _entries.data());
        }
    }

    return nullptr;
}

Ref<AssetLoader> AssetLoaderManager::tryCreateAssetLoaderFromFactory(const StringBox& urlScheme,
                                                                     snap::valdi_core::AssetOutputType outputType,