networkdiskcache.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 <QNetworkDiskCache>
#include <QRecursiveMutex>
#include <QHash>
#include <util/sll/util.h>
#include "networkconfig.h"
 
namespace LC::Util
{
    class UTIL_NETWORK_API NetworkDiskCache : public QNetworkDiskCache
    {
        Q_OBJECT
 
        qint64 CurrentSize_ = -1;
 
        mutable QRecursiveMutex InsertRemoveMutex_;
 
        QHash<QIODevice*, QUrl> PendingDev2Url_;
        QHash<QUrl, QList<QIODevice*>> PendingUrl2Devs_;
 
        const Util::DefaultScopeGuard GcGuard_;
    public:
        explicit NetworkDiskCache (const QString& subpath, QObject *parent = nullptr);

        qint64 cacheSize () const override;

        QIODevice* data (const QUrl& url) override;

        void insert (QIODevice *device) override;

        QNetworkCacheMetaData metaData (const QUrl& url) override;

        QIODevice* prepare (const QNetworkCacheMetaData&) override;

        bool remove (const QUrl& url) override;

        void updateMetaData (const QNetworkCacheMetaData& metaData) override;
    protected:
        qint64 expire () override;
    };
}