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/**************************************************************************
**
** Copyright (C) 2022 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Installer Framework.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
**************************************************************************/
#ifndef GENERICDATACACHE_H
#define GENERICDATACACHE_H
#include "installer_global.h"
#include "lockfile.h"
#include <QHash>
#include <QScopedPointer>
namespace QInstaller {
class INSTALLER_EXPORT CacheableItem
{
public:
CacheableItem() = default;
explicit CacheableItem(const QString &path)
: m_path(path)
{}
virtual ~CacheableItem() = 0;
virtual QString path() const { return m_path; }
virtual void setPath(const QString &path) { m_path = path; }
virtual QByteArray checksum() const = 0;
virtual bool isValid() const = 0;
virtual bool isActive() const = 0;
virtual bool obsoletes(CacheableItem *other) = 0;
private:
QString m_path;
};
template <typename T>
class INSTALLER_EXPORT GenericDataCache
{
public:
GenericDataCache();
explicit GenericDataCache(const QString &path, const QString &type, const QString &version);
~GenericDataCache();
void setType(const QString &type);
void setVersion(const QString &version);
bool initialize();
bool clear();
bool sync();
bool isValid() const;
QString errorString() const;
QString path() const;
void setPath(const QString &path);
QList<T *> items() const;
T *itemByChecksum(const QByteArray &checksum) const;
T *itemByPath(const QString &path) const;
bool registerItem(T *item, bool replace = false);
bool removeItem(const QByteArray &checksum);
QList<T *> obsoleteItems() const;
private:
void invalidate();
void setErrorString(const QString &error) const;
bool fromDisk();
bool toDisk();
private:
QScopedPointer<KDUpdater::LockFile> m_lock;
QHash<QByteArray, T *> m_items;
QString m_path;
QString m_type;
QString m_version;
mutable QString m_error;
bool m_invalidated;
};
} // namespace QInstaller
#endif // GENERICDATACACHE_H
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