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#ifndef GENERIC_READER_HPP_
#define GENERIC_READER_HPP_
#include <cstddef>
#include <exception>
#include <map>
#include <sstream>
#include <stdexcept>
#include <string>
#include <string_view>
#include <type_traits>
#include <vector>
#include "../Bytestring.hpp"
#include "../Generic.hpp"
#include "../Result.hpp"
#include "../always_false.hpp"
namespace rfl::generic {
struct Reader {
using InputArrayType = Generic::Array;
using InputObjectType = Generic::Object;
using InputVarType = Generic;
template <class T>
static constexpr bool has_custom_constructor = false;
rfl::Result<InputVarType> get_field_from_array(
const size_t _idx, const InputArrayType& _arr) const noexcept {
if (_idx >= _arr.size()) {
return error("Index " + std::to_string(_idx) + " of of bounds.");
}
return _arr[_idx];
}
rfl::Result<InputVarType> get_field_from_object(
const std::string& _name, const InputObjectType& _obj) const noexcept {
return _obj.get(_name);
}
bool is_empty(const InputVarType& _var) const noexcept {
return _var.is_null();
}
template <class T>
rfl::Result<T> to_basic_type(const InputVarType& _var) const noexcept {
if constexpr (std::is_same<std::remove_cvref_t<T>, std::string>()) {
return _var.to_string();
} else if constexpr (std::is_same<std::remove_cvref_t<T>, bool>()) {
return _var.to_bool();
} else if constexpr (std::is_floating_point<std::remove_cvref_t<T>>()) {
return _var.to_double().transform(
[](const auto& _v) { return static_cast<T>(_v); });
} else if constexpr (std::is_integral<std::remove_cvref_t<T>>()) {
if constexpr (sizeof(T) > sizeof(int)) {
return _var.to_int64().transform(
[](const auto& _v) { return static_cast<T>(_v); });
} else {
return _var.to_int().transform(
[](const auto& _v) { return static_cast<T>(_v); });
}
} else {
static_assert(rfl::always_false_v<T>, "Unsupported type.");
}
}
template <class ArrayReader>
std::optional<Error> read_array(const ArrayReader& _array_reader,
const InputArrayType& _arr) const noexcept {
for (const auto& v : _arr) {
const auto err = _array_reader.read(InputVarType(v));
if (err) {
return err;
}
}
return std::nullopt;
}
template <class ObjectReader>
std::optional<Error> read_object(const ObjectReader& _object_reader,
const InputObjectType& _obj) const noexcept {
for (const auto& [k, v] : _obj) {
_object_reader.read(std::string_view(k), v);
}
return std::nullopt;
}
rfl::Result<InputArrayType> to_array(
const InputVarType& _var) const noexcept {
return _var.to_array();
}
rfl::Result<InputObjectType> to_object(
const InputVarType& _var) const noexcept {
return _var.to_object();
}
template <class T>
rfl::Result<T> use_custom_constructor(
const InputVarType _var) const noexcept {
return error("Not supported for generic types");
}
};
} // namespace rfl::generic
#endif
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