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/*
                             This file is part of the Opie Project
                             Copyright (C) Stefan Eilers (Eilers.Stefan@epost.de)
              =.             Copyright (C) The Opie Team <opie-devel@handhelds.org>
            .=l.
           .>+-=
 _;:,     .>    :=|.         This program is free software; you can
.> <`_,   >  .   <=          redistribute it and/or  modify it under
:`=1 )Y*s>-.--   :           the terms of the GNU Library General Public
.="- .-=="i,     .._         License as published by the Free Software
 - .   .-<_>     .<>         Foundation; either version 2 of the License,
     ._= =}       :          or (at your option) any later version.
    .%`+i>       _;_.
    .i_,=:_.      -<s.       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
..}^=.=       =       ;      Library General Public License for more
++=   -.     .`     .:       details.
 :     =  ...= . :.=-
 -.   .:....=;==+<;          You should have received a copy of the GNU
  -_. . .   )=.  =           Library General Public License along with
    --        :-=`           this library; see the file COPYING.LIB.
                             If not, write to the Free Software Foundation,
                             Inc., 59 Temple Place - Suite 330,
                             Boston, MA 02111-1307, USA.
*/
/*
 * SQL Backend for the OPIE-Contact Database.
 */

#ifndef _OContactAccessBackend_SQL_
#define _OContactAccessBackend_SQL_

#include <opie2/ocontactaccessbackend.h>
#include <opie2/ocontactaccess.h>

#include <qlist.h>
#include <qdict.h>

/* aren't in namespace Opie yet - alwin */
class OSQLDriver;
class OSQLResult;
class OSQLResultItem;

namespace Opie {

/* the default xml implementation */
/**
 * This class is the SQL implementation of a Contact backend
 * it does implement everything available for OContact.
 * @see OPimAccessBackend for more information of available methods
 */
class OContactAccessBackend_SQL : public OContactAccessBackend {
 public:
	OContactAccessBackend_SQL ( const QString& appname, const QString& filename = QString::null );

	~OContactAccessBackend_SQL ();

	bool save();

	bool load ();

	void clear ();

	bool wasChangedExternally();

	QArray<int> allRecords() const;

	OContact find ( int uid ) const;
	// FIXME: Add lookahead-cache support !
	//OContact find(int uid, const QArray<int>&, uint cur, Frontend::CacheDirection )const;

	QArray<int> queryByExample ( const OContact &query, int settings, 
				     const QDateTime& d );

	QArray<int> matchRegexp(  const QRegExp &r ) const;

	const uint querySettings();

	bool hasQuerySettings (uint querySettings) const;

	// Currently only asc implemented..
	QArray<int> sorted( bool asc,  int , int ,  int );
	bool add ( const OContact &newcontact );

	bool replace ( const OContact &contact );

	bool remove ( int uid );
	bool reload();

 private:
	QArray<int> extractUids( OSQLResult& res ) const;
	QMap<int, QString>  requestNonCustom( int uid ) const;
	QMap<QString, QString>  requestCustom( int uid ) const;
	void update();

 protected:
	bool m_changed;
	QString m_fileName;
	QArray<int> m_uids;

	OSQLDriver* m_driver;
};

}

#endif