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#pragma once
#include <forstio/id.hpp>
#include <forstio/async/async.hpp>
#include <forstio/codec/data.hpp>
#include <forstio/codec/interface.hpp>
#include <variant>
#include "transfer.hpp"
namespace saw {
/**
* This class acts as a helper for rpc calls and representing data on the remote.
*/
template<typename T, typename Encoding>
class data_or_id {
private:
/**
* Variant representing the either id or data class.
*/
std::variant<id<T>, data<T,Encoding>> doi_;
public:
/**
* Constructor for instantiating.
*/
data_or_id(const id<T>& val):
doi_{val}
{}
/**
* Constructor for instantiating.
*/
data_or_id(data<T,Encoding> val):
doi_{std::move(val)}
{}
/**
* Check if this class holds an id.
*/
bool is_id() const {
return std::holds_alternative<id<T>>(doi_);
}
/**
* Check if this class holds data.
*/
bool is_data() const {
return std::holds_alternative<data<T,Encoding>>(doi_);
}
/**
* Returns the id.
*/
id<T> get_id() const {
return std::get<id<T>>(doi_);
}
/**
* Return a data reference.
*/
data<T,Encoding>& get_data(){
return std::get<data<T,Encoding>>(doi_);
}
/**
* Return a data reference.
*/
const data<T,Encoding>& get_data() const {
return std::get<data<T,Encoding>>(doi_);
}
};
/**
* Representing data on the remote
*/
template<typename T, typename Encoding, typename Remote>
class remote_data;
template<typename Iface, typename Encoding, typename Remote>
class rpc_client;
namespace impl {
template<typename T, typename Encoding, typename Remote>
struct tmpl_group_to_data_server_ptr_std_tuple;
template<typename... T, typename Encoding, typename Remote>
struct tmpl_group_to_data_server_ptr_std_tuple<tmpl_group<T...>, Encoding, Remote> {
using type = std::tuple<ptr<data_server<T,Encoding,Remote>>...>;
};
}
template<typename Remote>
class i_rpc_server {
protected:
virtual ~i_rpc_server() = default;
public:
virtual std::pair<uint32_t,uint32_t> get_class_id() const = 0;
template<typename To>
error_or<ptr<To>> cast_to(){
{
auto rhs = get_class_id();
if(To::class_id.first == rhs.first && To::class_id.second == rhs.second){
return {ptr<To>{*static_cast<To*>(this)}};
}
}
return make_error<err::invalid_state>("Class IDs are not matching.");
}
};
/**
* Implementation of a remote server on the backend
*/
template<typename Iface, typename Encoding, typename Remote>
class rpc_server {
private:
interface<Iface, Encoding> iface_;
public:
rpc_server(interface<Iface, Encoding> iface):
iface_{std::move(iface)}
{}
};
/**
* Representation of a remote.
* Partially similar to a network address
*/
template<typename Remote>
class remote_address {
static_assert(always_false<Remote>, "Type of remote not supported");
/**
*
*/
};
/**
* Reference Backend structure
*/
template<typename Remote>
class remote {
static_assert(always_false<Remote>, "Type of backend not supported");
};
}
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