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/*
Cache for recent files accessed.
Copyright (C) 2012 Philipp Schmidt <philschmidt@gmx.net>
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.
*/
#ifndef FILECACHE_H
#define FILECACHE_H
#define KIO_MTP 7000
#include <stdint.h>
#include <QDateTime>
#include <QHash>
#include <QPair>
/**
* @class FileCache Implements a time based cache for file ids, mapping their path to their ID. Does _not_ store the device they are on.
*/
class FileCache : public QObject
{
Q_OBJECT
private:
QHash<QString, QPair<QDateTime, uint32_t> > cache;
// private slots:
// void insertItem( const QString& path, QPair<QDateTime, uint32_t> item );
// void removeItem( const QString& path );
//
// signals:
// void s_insertItem( const QString& path, QPair<QDateTime, uint32_t> item );
// void s_removeItem( const QString& path );
public:
explicit FileCache ( QObject* parent = 0 );
/**
* Returns the ID of the item at the given path, else 0.
* Automatically discards old items.
*
* @param path The Path to query the cache for
* @return The ID of the Item if it exists, else 0
*/
uint32_t queryPath( const QString& path, int timeToLive = 60 );
/**
* Adds a Path to the Cache with the given id and ttl.
*
* @param path The path of the file/folder
* @param id The file ID on the storage
* @param timeToLive The time in seconds the entry should be valid
*/
void addPath( const QString& path, uint32_t id, int timeToLive = 60 );
/**
* Remove the given path from the cache, i.e. if it got deleted
*
* @param path The path that should be removed
*/
void removePath (const QString& path );
};
#endif // FILECACHE_H
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