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path: root/src/common/Dynamic/LinkedReference/RefManager.h
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/*
 * Copyright (C) 2016+     AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-GPL2
 * Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
 * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
 */

#ifndef _REFMANAGER_H
#define _REFMANAGER_H
//=====================================================

#include "Dynamic/LinkedList.h"
#include "Dynamic/LinkedReference/Reference.h"

template <class TO, class FROM> class RefManager : public LinkedListHead
{
public:
    typedef LinkedListHead::Iterator< Reference<TO, FROM>> iterator;
    RefManager() { }
    virtual ~RefManager() { clearReferences(); }

    Reference<TO, FROM>* getFirst() { return ((Reference<TO, FROM>*) LinkedListHead::getFirst()); }
    [[nodiscard]] Reference<TO, FROM> const* getFirst() const { return ((Reference<TO, FROM> const*) LinkedListHead::getFirst()); }
    Reference<TO, FROM>* getLast() { return ((Reference<TO, FROM>*) LinkedListHead::getLast()); }
    [[nodiscard]] Reference<TO, FROM> const* getLast() const { return ((Reference<TO, FROM> const*) LinkedListHead::getLast()); }

    iterator begin() { return iterator(getFirst()); }
    iterator end() { return iterator(NULL); }
    iterator rbegin() { return iterator(getLast()); }
    iterator rend() { return iterator(NULL); }

    void clearReferences()
    {
        LinkedListElement* ref;
        while ((ref = getFirst()) != nullptr)
        {
            ((Reference<TO, FROM>*) ref)->invalidate();
            ref->delink();                              // the delink might be already done by invalidate(), but doing it here again does not hurt and insures an empty list
        }
    }
};

//=====================================================
#endif