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77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
/*
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Cache for recent files accessed.
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Copyright (C) 2012 Philipp Schmidt <philschmidt@gmx.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef FILECACHE_H
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#define FILECACHE_H
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#include <stdint.h>
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#include <QDateTime>
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#include <QHash>
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#include <QPair>
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/**
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* @class FileCache Implements a time based cache for file ids, mapping their path to their ID. Does _not_ store the device they are on.
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*/
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class FileCache : public QObject
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{
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Q_OBJECT
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private:
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QHash<QString, QPair<QDateTime, uint32_t> > cache;
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// private slots:
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// void insertItem( const QString& path, QPair<QDateTime, uint32_t> item );
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// void removeItem( const QString& path );
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//
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// signals:
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// void s_insertItem( const QString& path, QPair<QDateTime, uint32_t> item );
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// void s_removeItem( const QString& path );
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public:
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explicit FileCache (QObject* parent = 0);
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/**
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* Returns the ID of the item at the given path, else 0.
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* Automatically discards old items.
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*
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* @param path The Path to query the cache for
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* @return The ID of the Item if it exists, else 0
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*/
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uint32_t queryPath(const QString& path, int timeToLive = 60);
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/**
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* Adds a Path to the Cache with the given id and ttl.
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*
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* @param path The path of the file/folder
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* @param id The file ID on the storage
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* @param timeToLive The time in seconds the entry should be valid
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*/
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void addPath(const QString& path, uint32_t id, int timeToLive = 60);
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/**
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* Remove the given path from the cache, i.e. if it got deleted
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*
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* @param path The path that should be removed
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*/
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void removePath(const QString& path );
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};
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#endif // FILECACHE_H
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