qBittorrent/src/base/asyncfilestorage.h

/*
 * Bittorrent Client using Qt and libtorrent.
 * Copyright (C) 2017  Vladimir Golovnev <glassez@yandex.ru>
 *
 * This program 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; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * In addition, as a special exception, the copyright holders give permission to
 * link this program with the OpenSSL project's "OpenSSL" library (or with
 * modified versions of it that use the same license as the "OpenSSL" library),
 * and distribute the linked executables. You must obey the GNU General Public
 * License in all respects for all of the code used other than "OpenSSL".  If you
 * modify file(s), you may extend this exception to your version of the file(s),
 * but you are not obligated to do so. If you do not wish to do so, delete this
 * exception statement from your version.
 */

#pragma once

#include <QFile>
#include <QObject>

#include "base/exceptions.h"
#include "base/path.h"

class AsyncFileStorageError : public RuntimeError
{
public:
    using RuntimeError::RuntimeError;
};

class AsyncFileStorage : public QObject
{
    Q_OBJECT
    Q_DISABLE_COPY_MOVE(AsyncFileStorage)

public:
    explicit AsyncFileStorage(const Path &storageFolderPath, QObject *parent = nullptr);
    ~AsyncFileStorage() override;

    void store(const Path &filePath, const QByteArray &data);

    Path storageDir() const;

signals:
    void failed(const Path &filePath, const QString &errorString);

private:
    Q_INVOKABLE void store_impl(const Path &fileName, const QByteArray &data);

    Path m_storageDir;
    QFile m_lockFile;
};