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#ifndef RFL_PARSING_PARSER_DURATION_HPP_
#define RFL_PARSING_PARSER_DURATION_HPP_
#include <chrono>
#include <map>
#include <optional>
#include <type_traits>
#include "../Literal.hpp"
#include "../Variant.hpp"
#include "../always_false.hpp"
#include "Parent.hpp"
#include "Parser_base.hpp"
#include "schema/Type.hpp"
namespace rfl ::parsing {
template <class R, class W, class Rep, class Period, class ProcessorsType>
requires AreReaderAndWriter<R, W, std::chrono::duration<Rep, Period>>
struct Parser<R, W, std::chrono::duration<Rep, Period>, ProcessorsType> {
public:
using InputVarType = typename R::InputVarType;
using ParentType = Parent<W>;
using DurationType = std::chrono::duration<Rep, Period>;
using Unit = Literal<"nanoseconds", "microseconds", "milliseconds", "seconds",
"minutes", "hours", "days", "weeks", "months", "years">;
using SupportedTypes =
Variant<std::chrono::nanoseconds, std::chrono::microseconds,
std::chrono::milliseconds, std::chrono::seconds,
std::chrono::minutes, std::chrono::hours, std::chrono::days,
std::chrono::weeks, std::chrono::months, std::chrono::years>;
struct RType {
int64_t count;
Unit unit;
};
static Result<DurationType> read(const R& _r,
const InputVarType& _var) noexcept {
return Parser<R, W, RType, ProcessorsType>::read(_r, _var)
.and_then(to_duration)
.transform([](auto&& _duration) {
return _duration.visit([](auto&& _d) -> DurationType {
return std::chrono::duration_cast<DurationType>(std::move(_d));
});
});
}
template <class P>
static void write(const W& _w, const DurationType& _d,
const P& _parent) noexcept {
const auto r =
RType{.count = static_cast<int64_t>(_d.count()), .unit = make_unit()};
return Parser<R, W, RType, ProcessorsType>::write(_w, r, _parent);
}
static schema::Type to_schema(
std::map<std::string, schema::Type>* _definitions) {
return Parser<R, W, RType, ProcessorsType>::to_schema(_definitions);
}
private:
static Result<SupportedTypes> to_duration(const RType& _r) {
switch (_r.unit.value()) {
case Unit::value_of<"nanoseconds">():
return SupportedTypes(std::chrono::nanoseconds(_r.count));
case Unit::value_of<"microseconds">():
return SupportedTypes(std::chrono::microseconds(_r.count));
case Unit::value_of<"milliseconds">():
return SupportedTypes(std::chrono::milliseconds(_r.count));
case Unit::value_of<"seconds">():
return SupportedTypes(std::chrono::seconds(_r.count));
case Unit::value_of<"minutes">():
return SupportedTypes(std::chrono::minutes(_r.count));
case Unit::value_of<"days">():
return SupportedTypes(std::chrono::days(_r.count));
case Unit::value_of<"weeks">():
return SupportedTypes(std::chrono::weeks(_r.count));
case Unit::value_of<"months">():
return SupportedTypes(std::chrono::months(_r.count));
case Unit::value_of<"years">():
return SupportedTypes(std::chrono::years(_r.count));
default:
return error("Unsupported unit.");
}
}
static auto make_unit() noexcept {
if constexpr (std::is_same_v<DurationType, std::chrono::nanoseconds>) {
return Unit::make<"nanoseconds">();
} else if constexpr (std::is_same_v<DurationType,
std::chrono::microseconds>) {
return Unit::make<"microseconds">();
} else if constexpr (std::is_same_v<DurationType,
std::chrono::milliseconds>) {
return Unit::make<"milliseconds">();
} else if constexpr (std::is_same_v<DurationType, std::chrono::seconds>) {
return Unit::make<"seconds">();
} else if constexpr (std::is_same_v<DurationType, std::chrono::minutes>) {
return Unit::make<"minutes">();
} else if constexpr (std::is_same_v<DurationType, std::chrono::hours>) {
return Unit::make<"hours">();
} else if constexpr (std::is_same_v<DurationType, std::chrono::days>) {
return Unit::make<"days">();
} else if constexpr (std::is_same_v<DurationType, std::chrono::weeks>) {
return Unit::make<"weeks">();
} else if constexpr (std::is_same_v<DurationType, std::chrono::months>) {
return Unit::make<"months">();
} else if constexpr (std::is_same_v<DurationType, std::chrono::years>) {
return Unit::make<"years">();
} else {
static_assert(always_false_v<DurationType>, "Unsupported type.");
}
};
};
} // namespace rfl::parsing
#endif
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