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#pragma once
#include <erebos/identity.h>
#include <erebos/uuid.h>
#include <optional>
namespace erebos {
using std::optional;
using std::vector;
class LocalState
{
public:
LocalState();
explicit LocalState(const Ref &);
static LocalState load(const Ref & ref) { return LocalState(ref); }
Ref store(const Storage &) const;
static const UUID headTypeId;
const optional<Identity> & identity() const;
LocalState identity(const Identity &) const;
template<class T> optional<T> shared() const;
template<class T> LocalState shared(const vector<Stored<T>> &) const;
template<class T> LocalState shared(const Stored<T> & x) const { return shared({ x }); };
template<class T> LocalState shared(const Storage & st, const T & x)
{ return updateShared(T::sharedTypeId, x.store(st)); }
private:
vector<Ref> lookupShared(UUID) const;
LocalState updateShared(UUID, const vector<Ref> &) const;
struct Priv;
std::shared_ptr<Priv> p;
};
template<class T>
optional<T> LocalState::shared() const
{
return T::load(lookupShared(T::sharedTypeId));
}
template<class T>
LocalState LocalState::shared(const vector<Stored<T>> & v) const
{
vector<Ref> refs;
for (const auto x : v)
refs.push_back(x.ref());
return updateShared(T::sharedTypeId, refs);
}
}
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