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/*
* Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
* Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
*/
#ifndef AsyncCallbackProcessor_h__
#define AsyncCallbackProcessor_h__
#include "Define.h"
#include <algorithm>
#include <vector>
//template <class T>
//concept AsyncCallback = requires(T t) { { t.InvokeIfReady() } -> std::convertible_to<bool> };
template<typename T> // requires AsyncCallback<T>
class AsyncCallbackProcessor
{
public:
AsyncCallbackProcessor() = default;
~AsyncCallbackProcessor() = default;
T& AddCallback(T&& query)
{
_callbacks.emplace_back(std::move(query));
return _callbacks.back();
}
void ProcessReadyCallbacks()
{
if (_callbacks.empty())
return;
std::vector<T> updateCallbacks{ std::move(_callbacks) };
updateCallbacks.erase(std::remove_if(updateCallbacks.begin(), updateCallbacks.end(), [](T& callback)
{
return callback.InvokeIfReady();
}), updateCallbacks.end());
_callbacks.insert(_callbacks.end(), std::make_move_iterator(updateCallbacks.begin()), std::make_move_iterator(updateCallbacks.end()));
}
private:
AsyncCallbackProcessor(AsyncCallbackProcessor const&) = delete;
AsyncCallbackProcessor& operator=(AsyncCallbackProcessor const&) = delete;
std::vector<T> _callbacks;
};
#endif // AsyncCallbackProcessor_h__
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