storage.h

/*
    This file is part of Akregator.
 
    Copyright (C) 2005 Stanislav Karchebny <Stanislav.Karchebny@kdemail.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.
 
    As a special exception, permission is given to link this program
    with any edition of TQt, and distribute the resulting executable,
    without including the source code for TQt in the source distribution.
*/
 
#ifndef AKREGATOR_BACKEND_STORAGE_H
#define AKREGATOR_BACKEND_STORAGE_H
 
#include <tqobject.h>
 
#include "akregator_export.h"
 
class TQString;
class TQStringList;
 
namespace Akregator {
namespace Backend {
 
class FeedStorage;
 
class AKREGATOR_EXPORT Storage : public TQObject
{
    public:
 
        static Storage* getInstance();
        static void setInstance(Storage* instance);
 
        virtual ~Storage() {}
 
        virtual void initialize(const TQStringList& params) = 0;
        
        virtual bool open(bool autoCommit = false) = 0;
 
        virtual bool commit() = 0;
 
        virtual bool rollback() = 0;
 
        virtual bool close() = 0;
 
        virtual FeedStorage* archiveFor(const TQString &url) = 0;
        virtual bool autoCommit() const  = 0;
        virtual int unreadFor(const TQString &url) = 0;
        virtual void setUnreadFor(const TQString &url, int unread) = 0;
        virtual int totalCountFor(const TQString &url) = 0;
        virtual void setTotalCountFor(const TQString &url, int total) = 0;
        virtual int lastFetchFor(const TQString& url) = 0;
        virtual void setLastFetchFor(const TQString& url, int lastFetch) = 0;
 
        virtual void storeFeedList(const TQString& opmlStr) = 0;
        virtual TQString restoreFeedList() const = 0;
 
        virtual void storeTagSet(const TQString& xmlStr) = 0;
        virtual TQString restoreTagSet() const = 0;
 
        virtual TQStringList feeds() const = 0;
 
        virtual void add(Storage* source) = 0;
        
        virtual void clear() = 0;
        
     private:
        
        static Storage *m_instance;
};
 
}
}
 
#endif