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#include "state.h"
#include "identity.h"
using namespace erebos;
using std::make_shared;
const UUID LocalState::headTypeId { "1d7491a9-7bcb-4eaa-8f13-c8c4c4087e4e" };
LocalState::LocalState():
p(make_shared<Priv>())
{}
LocalState::LocalState(const Ref & ref):
LocalState()
{
auto rec = ref->asRecord();
if (!rec)
return;
if (auto x = rec->item("id").asRef())
p->identity = Identity::load(*x);
for (auto i : rec->items("shared"))
if (const auto & x = i.as<SharedData>())
p->shared.tip.push_back(*x);
if (p->identity) {
vector<Stored<Signed<IdentityData>>> updates;
for (const auto & r : lookupShared(SharedType<optional<Identity>>::id))
updates.push_back(Stored<Signed<IdentityData>>::load(r));
if (!updates.empty())
p->identity = p->identity->update(updates);
}
}
Ref LocalState::store(const Storage & st) const
{
vector<Record::Item> items;
if (p->identity)
items.emplace_back("id", *p->identity->ref());
for (const auto & x : p->shared.tip)
items.emplace_back("shared", x);
return st.storeObject(Record(std::move(items)));
}
const optional<Identity> & LocalState::identity() const
{
return p->identity;
}
LocalState LocalState::identity(const Identity & id) const
{
LocalState ret;
ret.p->identity = id;
ret.p->shared = p->shared;
return ret;
}
vector<Ref> LocalState::lookupShared(UUID type) const
{
return p->shared.lookup(type);
}
vector<Ref> SharedState::lookup(UUID type) const
{
return p->lookup(type);
}
vector<Ref> SharedState::Priv::lookup(UUID type) const
{
vector<Stored<SharedData>> found;
vector<Stored<SharedData>> process = tip;
while (!process.empty()) {
auto cur = std::move(process.back());
process.pop_back();
if (cur->type == type) {
found.push_back(std::move(cur));
continue;
}
for (const auto & x : cur->prev)
process.push_back(x);
}
filterAncestors(found);
vector<Ref> res;
for (const auto & s : found)
for (const auto & v : s->value)
res.push_back(v);
return res;
}
vector<Ref> LocalState::sharedRefs() const
{
vector<Ref> refs;
for (const auto & x : p->shared.tip)
refs.push_back(x.ref());
return refs;
}
LocalState LocalState::sharedRefAdd(const Ref & ref) const
{
const Storage * st;
if (p->shared.tip.size() > 0)
st = &p->shared.tip[0].ref().storage();
else if (p->identity)
st = &p->identity->ref()->storage();
else
st = &ref.storage();
LocalState ret;
ret.p->identity = p->identity;
ret.p->shared = p->shared;
ret.p->shared.tip.push_back(SharedData(ref).store(*st));
filterAncestors(ret.p->shared.tip);
return ret;
}
LocalState LocalState::updateShared(UUID type, const vector<Ref> & xs) const
{
const Storage * st;
if (p->shared.tip.size() > 0)
st = &p->shared.tip[0].ref().storage();
else if (p->identity)
st = &p->identity->ref()->storage();
else if (xs.size() > 0)
st = &xs[0].storage();
else
return *this;
LocalState ret;
ret.p->identity = p->identity;
ret.p->shared.tip.push_back(SharedData(p->shared.tip, type, xs).store(*st));
return ret;
}
bool SharedState::operator==(const SharedState & other) const
{
return p->tip == other.p->tip;
}
bool SharedState::operator!=(const SharedState & other) const
{
return p->tip != other.p->tip;
}
SharedData::SharedData(const Ref & ref)
{
auto rec = ref->asRecord();
if (!rec)
return;
for (auto i : rec->items("PREV"))
if (const auto & x = i.as<SharedData>())
prev.push_back(*x);
if (auto x = rec->item("type").asUUID())
type = *x;
for (auto i : rec->items("value"))
if (const auto & x = i.asRef())
value.push_back(*x);
}
Ref SharedData::store(const Storage & st) const
{
vector<Record::Item> items;
for (const auto & x : prev)
items.emplace_back("PREV", x);
items.emplace_back("type", type);
for (const auto & x : value)
items.emplace_back("value", x);
return st.storeObject(Record(std::move(items)));
}
template<>
optional<Identity> LocalState::lens<optional<Identity>>(const LocalState & x)
{
return x.identity();
}
template<>
vector<Ref> LocalState::lens<vector<Ref>>(const LocalState & x)
{
return x.sharedRefs();
}
template<>
SharedState LocalState::lens<SharedState>(const LocalState & x)
{
return SharedState(shared_ptr<SharedState::Priv>(x.p, &x.p->shared));
}
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