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clientutil.hpp
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clientutil.hpp
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/*
* This file is part of libkazv.
* SPDX-FileCopyrightText: 2021-2023 tusooa <tusooa@kazv.moe>
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#pragma once
#include <libkazv-config.hpp>
#include <string>
#include <tuple>
#include <immer/map.hpp>
#include <zug/transducer/filter.hpp>
#include <zug/transducer/eager.hpp>
#include <lager/deps.hpp>
#include <boost/container_hash/hash.hpp>
#include <boost/serialization/string.hpp>
#include <cursorutil.hpp>
#include <jobinterface.hpp>
#include <eventinterface.hpp>
#include "thread-safety-helper.hpp"
namespace Kazv
{
struct ClientModel;
template<class K, class V, class List, class Func>
immer::map<K, V> merge(immer::map<K, V> map, List list, Func keyOf)
{
for (auto v : list) {
auto key = keyOf(v);
map = std::move(map).set(key, v);
}
return map;
}
inline std::string keyOfPresence(Event e) {
return e.sender();
}
inline std::string keyOfAccountData(Event e) {
return e.type();
}
inline std::string keyOfTimeline(Event e) {
return e.id();
}
inline std::string keyOfEphemeral(Event e) {
return e.type();
}
struct KeyOfState {
std::string type;
std::string stateKey;
friend bool operator==(const KeyOfState &a, const KeyOfState &b) = default;
};
template<class Archive>
void serialize(Archive &ar, KeyOfState &m, std::uint32_t const /* version */)
{
ar & m.type & m.stateKey;
}
inline KeyOfState keyOfState(Event e) {
return {e.type(), e.stateKey()};
}
template<class Context>
JobInterface &getJobHandler(Context &&ctx)
{
return lager::get<JobInterface &>(std::forward<Context>(ctx));
}
template<class Context>
EventInterface &getEventEmitter(Context &&ctx)
{
return lager::get<EventInterface &>(std::forward<Context>(ctx));
}
/**
* Merge `addon` into the sorted container `base`.
*
* This function will look into every item `x` in `addon`. If `exists(x)`,
* nothing is done. Otherwise, it does a binary search in `base`. If
* there is an item `k` where `keyOf(k) == keyOf(x)`, nothing is done.
* Otherwise, `x` is inserted into `base`, keeping the sort order.
*
* This function invokes at most `O(|addon|*log(|base|))` comparisons; each
* comparison invokes exactly 2 `keyOf`s.
*
* This function invokes at most `|addon|` insertions of `base`.
*
* This function invokes `exists` exactly `|addon|` times.
*
* @param base An immer sequence container of some type T. `base` must be sorted
* in strict ascending order in terms of `keyOf`. I.e., For any two items x, y: `keyOf(x) < keyOf(y)` iff x is before y.
* @param addon A range of the same type T.
* @param exists A function taking T and producing a boolean value.
* @param keyOf A key function for the sorting of `base`. It must be a strong order.
*
*/
template<class ImmerT1, class RangeT2, class Pred, class Func>
ImmerT1 sortedUniqueMerge(ImmerT1 base, RangeT2 addon, Pred exists, Func keyOf)
{
auto cmp = [=](auto a, auto b) {
return keyOf(a) < keyOf(b);
};
for (auto item : addon) {
if (exists(item)) {
continue;
}
// https://en.cppreference.com/w/cpp/algorithm/upper_bound.html
// *(it-1) <= item < *it
auto it = std::upper_bound(base.begin(), base.end(), item, cmp);
// If `it` is not the first iterator, and `*(it-1) == item`,
// then `item` is already in the list. Otherwise, we are guaranteed
// that `*(it-1)` either does not exist, or `*(it-1) < item`.
// In these cases, `item` is not in the list and we will need
// to add them.
if (it.index() != 0 && keyOf(item) == keyOf(*(it - 1))) {
continue;
}
auto index = it.index();
base = std::move(base).insert(index, item);
}
return base;
}
std::string increaseTxnId(std::string cur);
std::string getTxnId(Event event, ClientModel &m);
}
namespace std
{
template<> struct hash<Kazv::KeyOfState>
{
std::size_t operator()(const Kazv::KeyOfState & k) const noexcept {
std::size_t seed = 0;
boost::hash_combine(seed, k.type);
boost::hash_combine(seed, k.stateKey);
return seed;
}
};
}
#define KAZV_WRAP_ATTR(_type, _d, _attr) \
inline auto _attr() const { \
KAZV_VERIFY_THREAD_ID(); \
return (_d)[&_type::_attr]; \
}
BOOST_CLASS_VERSION(Kazv::KeyOfState, 0)

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