// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

//

#ifndef __DBUNDO_H__

#define __DBUNDO_H__

	#include "commsdattypesv1_1.h"

	#include <metadatabase.h>

	using namespace CommsDat;

#include <e32base.h>

#include <e32std.h>

#include <e32def.h>

// For Connection Preferences table

#include <cdbpreftable.h>

// COMMDB Connection Preference settings

#include <comms-infras/connectionsettings.h>

// Indexes of the CDMA, GPRS and Dial Out IAP records

// Dependent on the database used

#define KGprsIAPIndex 2

#define KDialOutIAPIndex 1

_LIT( KDialOutIap, "DialOutIsp" );

_LIT( KGprsIap, "NTRas GPRS" );

class CBearerUpdate

		{

public:

		TUint32 iBearerSet;

		TUint32 iIapId;	

		};

class CConnectionPrefUpdate

		{

public:

		TUint32 iRanking;

		CMDBField<TCommDbConnectionDirection> iDirection;

		TUint32 iDialogPref;

		CBearerUpdate iBearer;

		};

// Classes to maintain an "undo" linked list to restore database state

// between tests

class CDbAgtBase;

// Base class for storing undo data, derived classes store data specific to the 

// type of column we're dealing with

class CDbUndoBase : public CBase

	{

public:

	virtual void UndoL(CDbAgtBase *aTable)=0;

public:

	TDblQueLink iLink;

protected:

	TPtrC iColumn;

	};

// Derived from CDbUndoBase to store integer values requiring Undo

class CDbUndoInt : public CDbUndoBase

	{

public:

	static CDbUndoInt* NewL(const TDesC &aColumn, const TUint32 &aValue);

	void ConstructL(const TDesC &aColumn, const TUint32 &aValue);

	// Concrete implementation of pure virtual in CDbUndoBase

	virtual void UndoL(CDbAgtBase *aDb);

private:

	// Data specific to the type of column we're are dealing with

	// In this class we undo integer data.

	TUint32 iValue;

	};

// Derived from CDbUndoBase to store boolean values requiring Undo

class CDbUndoBool : public CDbUndoBase

	{

public:

	static CDbUndoBool* NewL(const TDesC &aColumn, const TBool &aValue);

	void ConstructL(const TDesC &aColumn, const TBool &aValue);

	// Concrete implementation of pure virtual in CDbUndoBase

	virtual void UndoL(CDbAgtBase *aDb);

private:

	// Data specific to the type of column we're are dealing with

	// In this class we undo boolean data.

	TBool iValue;

	};

// Derived from CDbUndoBase to store text values requiring Undo

class CDbUndoText : public CDbUndoBase

	{

public:

	static CDbUndoText* NewL(const TDesC &aColumn, const TDesC16& aValue);

	void ConstructL(const TDesC &aColumn, const TDesC16& aValue);

	// Concrete implementation of pure virtual in CDbUndoBase

	virtual void UndoL(CDbAgtBase *aDb);

private:

	// Data specific to the type of column we're are dealing with

	// In this class we undo text data.

	TBuf16<KCommsDbSvrMaxFieldLength> iText;

	};

// Derived from CDbUndoBase to store long text values requiring Undo

class CDbUndoLongText : public CDbUndoBase

	{

public:

	static CDbUndoLongText* NewL(const TDesC &aColumn, const HBufC* aValue);

	void ConstructL(const TDesC &aColumn, const HBufC* aValue);

	// Concrete implementation of pure virtual in CDbUndoBase

	virtual void UndoL(CDbAgtBase *aDb);

private:

	// Data specific to the type of column we're are dealing with

	// In this class we undo long text data.

	HBufC* iLongText;

	};

// Derived from CDbUndoBase to store agent extension name requiring Undo

class CDbUndoAgentExt : public CDbUndoBase

	{

public:

	static CDbUndoAgentExt* NewL(const TDesC &aService, const TDesC& aAgentExt);

	void ConstructL(const TDesC &aService, const TDesC& aAgentExt);

	// Concrete implementation of pure virtual in CDbUndoBase

	virtual void UndoL(CDbAgtBase *aDb);

private:

	// Data specific to the type of column we're are dealing with

	// In this class we undo text data.

	TBuf16<KCommsDbSvrMaxFieldLength> iText;

	};

// Base class for all database access

class CDbAgtBase : public CBase 

	{

	friend class CDbUndoInt;

	friend class CDbUndoBool;

	friend class CDbUndoText;

	friend class CDbUndoLongText;

	friend class CDbUndoAgentExt;

public:

	~CDbAgtBase();

	void SetColumnIntL(const TDesC& aColumn, const TUint32& aValue);

	void SetColumnBoolL(const TDesC& aColumn, const TBool& aValue);

	void SetColumnTextL(const TDesC& aColumn, const TDesC16& aValue);

	void SetColumnLongTextL(const TDesC& aColumn, const TDesC16& aValue);

	void SetAgentExtL(const TDesC& aService, const TDesC& aAgentExt);

	void UndoDatabaseChangesL();

protected:

	CDbAgtBase();

	void ConstructL();

protected:

	// Used to access the database and retain a view on whichever table is of interest

	CMDBSession *iDb;

	CMDBRecordSetBase* iTable;

	TUint iCurrentRecord;

private:

	void ModifyColumnIntL(const TDesC& aColumn, const TUint32& aValue);

	void ModifyColumnBoolL(const TDesC& aColumn, const TBool& aValue);

	void ModifyColumnTextL(const TDesC& aColumn, const TDesC16& aValue);

	void ModifyColumnLongTextL(const TDesC& aColumn, const TDesC16& aValue);

	void ModifyAgentExtL(const TDesC &aService, const TDesC& aAgentExt);

private:

	// Double linked list header for undo functionality

	TDblQue<CDbUndoBase> iQHeader;

	// Double linked list iterator for undo functionality

	TDblQueIter<CDbUndoBase> iQIter;

	};

// GPRS OUTGOING specific class 

class CDbGPRSOutgoingTable : public CDbAgtBase 

	{

public:

	static CDbGPRSOutgoingTable *NewL();

	~CDbGPRSOutgoingTable();

private:

	CDbGPRSOutgoingTable();

	void ConstructL();

	};

// CSD specific class 

class CDbCsdTable : public CDbAgtBase 

	{

public:

	static CDbCsdTable *NewL();

	~CDbCsdTable();

private:

	CDbCsdTable();

	void ConstructL();

	};

// MODEM specific class 

class CDbModemTable : public CDbAgtBase 

	{

public:

	static CDbModemTable *NewL();

	~CDbModemTable();

private:

	CDbModemTable();

	void ConstructL();

	};

// Preference table

class CDbPrefTable : public CDbAgtBase 

	{

public:

	static CDbPrefTable *NewL( CMDBField<TCommDbConnectionDirection> aDirection, CBearerUpdate aBearerUpdate, TBool aReadOnly, TUint32 aDialogPref );

	~CDbPrefTable();

private:

	CDbPrefTable();

	void ConstructL();

	void RevertPreferenceTableL();

	CMDBRecordSet<CCDConnectionPrefsRecord>* iPrefTable;

	TUint iCurrentPrefRecord;

	TBuf16<KCommsDbSvrMaxFieldLength> iIapName;

	CMDBField<TCommDbConnectionDirection> iDirection;

	CBearerUpdate iBearerUpdate;

	CConnectionPrefUpdate iOldPrefs;

	TBool iReadOnly;

	TUint32 iDialogPref;

	};

// IAP table

class CDbIapTable : public CDbAgtBase 

	{

public:

	static CDbIapTable *NewL(const TDesC16& aIapName);

	~CDbIapTable();

	void GetBearerSetIapIdL(TUint32& aIapId);

private:

	CDbIapTable();

	void ConstructL();

	TBuf16<KCommsDbSvrMaxFieldLength> iIapName;

	};

#endif  // DBUNDO