queuemanager.h

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/
 
#pragma once
 
#include <functional>
#include <optional>
#include <QObject>
#include <QDateTime>
#include <QPointer>
#include <QPair>
#include "sllconfig.h"
 
class QTimer;
 
namespace LC
{
namespace Util
{
    enum class QueuePriority
    {
        Normal,

        High
    };

    class UTIL_SLL_API QueueManager : public QObject
    {
        Q_OBJECT
 
        const int Timeout_;
        QTimer * const ReqTimer_;
        QDateTime LastRequest_;
 
        bool Paused_;
 
        typedef std::optional<QPointer<QObject>> OptionalTracker_t;
        QList<QPair<std::function<void ()>, std::optional<QPointer<QObject>>>> Queue_;
    public:
        QueueManager (int timeout, QObject *parent = nullptr);

        void Schedule (std::function<void ()> functor,
                QObject *dependent = nullptr,
                QueuePriority prio = QueuePriority::Normal);

        void Clear ();

        void Pause ();

        bool IsPaused () const;

        void Resume ();
    private slots:
        void exec ();
    };
}
}