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#pragma once
#include <forstio/error.h>
#include "data.h"
namespace saw {
namespace encode {
struct Csv {};
}
namespace impl {
template<typename Schema, typename FromDecode>
struct csv_encode {
static_assert(always_false<T>, "Case not supported");
};
template<typename T, size_t Dim>
struct csv_encode<schema::Array<T,Dim>, FromDecode> {
static_assert(Dim == 1, "Only one dimension is allowed.");
static_assert(!is_array<T>::value, "Array of an array is not allowed.");
static_assert(is_tuple<T>::value || is_struct<T>::value, "Only struct or tuples allowed inside a csv array");
using Schema = schema::Array<T,Dim>;
static error_or<void> encode(const data<Schema, FromDecode>& from, data<Schema, encode::Csv>& to){
if constexpr (is_struct<T>::value){
auto eov = csv_encode<T>::encode_header(to);
if(eov.is_error()){
return eov;
}
}
for(std::size_t i = 0; i < from.size(); ++i){
auto eov = csv_encode<T>::encode(from.at(i), to);
if(eov.is_error()){
return eov;
}
}
return void_t{};
}
};
template<>
struct csv_encode<schema::String, FromDecode> {
using Schema = schema::String;
static error_or<void> encode(const data<Schema, FromDecode>& from, data<Schema, encode::Csv>& to){
return void_t{};
}
};
}
template<typename Schema>
class codec<Schema, encode::Csv> {
static_assert(is_array<Schema>::value, "Only an Array is allowed as a base value");
public:
template<typename FromEncode>
static error_or<void> encode(const data<Schema, FromEncode>& from, data<Schema,encode::Csv>& to){
return make_error<err::not_implemented>();
}
template<typename ToDecode>
static error_or<void> decode(data<Schema,encode::Csv>& from, data<Schema, FromEncode>& to){
return make_error<err::not_implemented>();
}
};
}
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