LinkedItemList.h

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/****
 * LinkedItemList.h
 *
 * Copyright 2019 mikee47 <mike@sillyhouse.net>
 *
 * This file is part of the Sming UPnP Library
 *
 * This library is free software: you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation, version 3 or later.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this library.
 * If not, see <https://www.gnu.org/licenses/>.
 *
 ****/

#pragma once

#include "LinkedItem.h"

namespace UPnP
{
class LinkedItemList
{
public:
    bool add(LinkedItem* item);

    bool add(const LinkedItem* item)
    {
        return add(const_cast<LinkedItem*>(item));
    }

    bool remove(LinkedItem* item);

    void clear()
    {
        head_ = nullptr;
    }

    LinkedItem* head()
    {
        return head_;
    }

    const LinkedItem* head() const
    {
        return head_;
    }

    LinkedItem* find(LinkedItem* item)
    {
        auto p = head_;
        while(p != nullptr && p != item) {
            p = p->next();
        }
        return p;
    }

    const LinkedItem* find(LinkedItem* item) const
    {
        return const_cast<LinkedItemList*>(this)->find(item);
    }

    bool contains(LinkedItem* item) const
    {
        return find(item) != nullptr;
    }

private:
    LinkedItem* head_{nullptr};
};

} // namespace UPnP