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#include <contrib/libs/cctz/include/cctz/zone_info_source.h>
#include <library/cpp/resource/resource.h>
#include <util/generic/string.h>
#include <util/stream/str.h>
#include <util/string/builder.h>
namespace cctz_extension {
namespace {
class TZoneInfoSource: public cctz::ZoneInfoSource {
private:
TZoneInfoSource(TString&& data)
: TimeZoneData_(data)
, Stream_(TimeZoneData_)
{
}
public:
static std::unique_ptr<cctz::ZoneInfoSource> LoadZone(const std::string& zoneName) {
TString resourceName = TStringBuilder() << "/cctz/tzdata/"sv << zoneName;
TString tzData;
if (!NResource::FindExact(resourceName, &tzData)) {
return nullptr;
}
return std::unique_ptr<cctz::ZoneInfoSource>(new TZoneInfoSource(std::move(tzData)));
}
size_t Read(void* buf, size_t size) override {
return Stream_.Read(buf, size);
}
int Skip(size_t offset) override {
Stream_.Skip(offset);
return 0;
}
private:
const TString TimeZoneData_;
TStringInput Stream_;
};
std::unique_ptr<cctz::ZoneInfoSource> CustomFactory(
const std::string& name,
const std::function<std::unique_ptr<cctz::ZoneInfoSource>(const std::string& name)>& /*fallback*/
)
{
std::unique_ptr<cctz::ZoneInfoSource> zis = TZoneInfoSource::LoadZone(name);
if (zis) {
return zis;
}
return nullptr;
}
} // namespace
ZoneInfoSourceFactory zone_info_source_factory = CustomFactory;
} // namespace cctz_extension
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