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#include <mbgl/storage/file_source_manager.hpp>
#include <mbgl/storage/resource_options.hpp>
#include <mbgl/util/string.hpp>
#include <map>
#include <mutex>
#include <tuple>
namespace mbgl {
class FileSourceManager::Impl {
public:
using Key = std::tuple<FileSourceType, std::string>;
std::map<Key, std::weak_ptr<FileSource>> fileSources;
std::map<FileSourceType, FileSourceFactory> fileSourceFactories;
std::recursive_mutex mutex;
};
FileSourceManager::FileSourceManager() : impl(std::make_unique<Impl>()) {}
FileSourceManager::~FileSourceManager() = default;
std::shared_ptr<FileSource> FileSourceManager::getFileSource(FileSourceType type,
const ResourceOptions& options) noexcept {
std::lock_guard<std::recursive_mutex> lock(impl->mutex);
// Remove released file sources.
for (auto it = impl->fileSources.begin(); it != impl->fileSources.end();) {
it = it->second.expired() ? impl->fileSources.erase(it) : ++it;
}
const auto context = reinterpret_cast<uint64_t>(options.platformContext());
const std::string optionsKey =
options.baseURL() + '|' + options.accessToken() + '|' + options.cachePath() + '|' + util::toString(context);
const auto key = std::tie(type, optionsKey);
std::shared_ptr<FileSource> fileSource;
auto tuple = impl->fileSources.find(key);
if (tuple != impl->fileSources.end()) {
fileSource = tuple->second.lock();
}
if (!fileSource) {
auto it = impl->fileSourceFactories.find(type);
if (it != impl->fileSourceFactories.end()) {
assert(it->second);
impl->fileSources[key] = fileSource = it->second(options);
}
}
return fileSource;
}
void FileSourceManager::registerFileSourceFactory(FileSourceType type, FileSourceFactory&& factory) noexcept {
assert(factory);
std::lock_guard<std::recursive_mutex> lock(impl->mutex);
impl->fileSourceFactories[type] = std::move(factory);
}
FileSourceManager::FileSourceFactory FileSourceManager::unRegisterFileSourceFactory(FileSourceType type) noexcept {
std::lock_guard<std::recursive_mutex> lock(impl->mutex);
auto it = impl->fileSourceFactories.find(type);
FileSourceFactory factory;
if (it != impl->fileSourceFactories.end()) {
factory = std::move(it->second);
impl->fileSourceFactories.erase(it);
}
return factory;
}
} // namespace mbgl
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