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#pragma once
#include "ugc/types.hpp"
#include "base/exception.hpp"
#include "3party/jansson/myjansson.hpp"
#include <cstdint>
#include <cstdlib>
namespace ugc
{
template <typename Sink>
class SerializerJson
{
public:
SerializerJson(Sink & sink) : m_sink(sink) {}
~SerializerJson()
{
char * str = json_dumps(m_json.get(), 0);
std::string json(str);
std::free(static_cast<void *>(str));
m_sink.Write(json.data(), json.size());
}
void operator()(bool const d, char const * name = nullptr) { ToJSONObject(*m_json, name, d); }
void operator()(uint8_t const d, char const * name = nullptr) { ToJSONObject(*m_json, name, d); }
void operator()(uint32_t const d, char const * name = nullptr) { ToJSONObject(*m_json, name, d); }
void operator()(uint64_t const d, char const * name = nullptr) { ToJSONObject(*m_json, name, d); }
void operator()(std::string const & s, char const * name = nullptr)
{
ToJSONObject(*m_json, name, s);
}
void operator()(TranslationKey const & key, char const * name = nullptr)
{
(*this)(key.m_key, name);
}
void operator()(Time const & t, char const * name = nullptr)
{
(*this)(ToDaysSinceEpoch(t), name);
}
void operator()(Sentiment sentiment, char const * name = nullptr)
{
switch (sentiment)
{
case Sentiment::Negative: return (*this)(false, name);
case Sentiment::Positive: return (*this)(true, name);
}
}
template <typename T>
void operator()(vector<T> const & vs, char const * name = nullptr)
{
NewScopeWith(my::NewJSONArray(), name, [this, &vs] {
for (auto const & v : vs)
(*this)(v);
});
}
template <typename R>
void operator()(R const & r, char const * name = nullptr)
{
NewScopeWith(my::NewJSONObject(), name, [this, &r] { r.Visit(*this); });
}
void VisitRating(float const f, char const * name = nullptr)
{
CHECK_GREATER_OR_EQUAL(f, 0.0, ());
auto const d = static_cast<double>(f);
ToJSONObject(*m_json, name, d);
}
template <typename T>
void VisitVarUint(T const & t, char const * name = nullptr)
{
ToJSONObject(*m_json, name, t);
}
private:
template <typename Fn>
void NewScopeWith(my::JSONPtr json_object, char const * name, Fn && fn)
{
my::JSONPtr safe_json = std::move(m_json);
m_json = std::move(json_object);
fn();
if (safe_json && json_is_array(safe_json))
json_array_append_new(safe_json.get(), m_json.release());
else if (safe_json && json_is_object(safe_json))
json_object_set_new(safe_json.get(), name, m_json.release());
if (safe_json)
m_json = std::move(safe_json);
}
my::JSONPtr m_json = nullptr;
Sink & m_sink;
};
class DeserializerJsonV0
{
public:
DECLARE_EXCEPTION(Exception, RootException);
template <typename Source,
typename std::enable_if<
!std::is_convertible<Source, std::string>::value, Source>::type * = nullptr>
DeserializerJsonV0(Source & source)
{
std::string src(source.Size(), '\0');
source.Read(static_cast<void *>(&src[0]), source.Size());
m_jsonObject.ParseFrom(src);
m_json = m_jsonObject.get();
}
DeserializerJsonV0(std::string const & source)
: m_jsonObject(source)
, m_json(m_jsonObject.get())
{
}
void operator()(bool & d, char const * name = nullptr) { FromJSONObject(m_json, name, d); }
void operator()(uint8_t & d, char const * name = nullptr) { FromJSONObject(m_json, name, d); }
void operator()(uint32_t & d, char const * name = nullptr) { FromJSONObject(m_json, name, d); }
void operator()(uint64_t & d, char const * name = nullptr) { FromJSONObject(m_json, name, d); }
void operator()(std::string & s, char const * name = nullptr) { FromJSONObject(m_json, name, s); }
void operator()(TranslationKey & key, char const * name = nullptr)
{
(*this)(key.m_key, name);
}
void operator()(Time & t, char const * name = nullptr)
{
uint32_t d = 0;
FromJSONObject(m_json, name, d);
t = FromDaysSinceEpoch(d);
}
void operator()(Sentiment & sentiment, char const * name = nullptr)
{
bool s = false;
FromJSONObject(m_json, name, s);
sentiment = s ? Sentiment::Positive : Sentiment::Negative;
}
template <typename T>
void operator()(vector<T> & vs, char const * name = nullptr)
{
json_t * context = SaveContext(name);
if (!json_is_array(m_json))
MYTHROW(my::Json::Exception, ("The field", name, "must contain a json array."));
vs.resize(json_array_size(m_json));
for (size_t index = 0; index < vs.size(); ++index)
{
json_t * context = SaveContext();
m_json = json_array_get(context, index);
(*this)(vs[index]);
RestoreContext(context);
}
RestoreContext(context);
}
template <typename R>
void operator()(R & r, char const * name = nullptr)
{
json_t * context = SaveContext(name);
r.Visit(*this);
RestoreContext(context);
}
void VisitRating(float & f, char const * name = nullptr)
{
double d = 0.0;
FromJSONObject(m_json, name, d);
f = static_cast<float>(d);
}
template <typename T>
void VisitVarUint(T & t, char const * name = nullptr)
{
FromJSONObject(m_json, name, t);
}
private:
json_t * SaveContext(char const * name = nullptr)
{
json_t * context = m_json;
if (name)
m_json = my::GetJSONObligatoryField(context, name);
return context;
}
void RestoreContext(json_t * context)
{
if (context)
m_json = context;
}
my::Json m_jsonObject;
json_t * m_json = nullptr;
};
} // namespace ugc
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