// Copyright (c) 1999-2009 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 __HLPSRCH_H__

#define __HLPSRCH_H__

#include <e32std.h>

#include <d32dbms.h>

#include <s32file.h>

#include "HLPDB.H"

#include "HLPMODEL.H"

class CHlpDatabase;

class MHlpDbObserver;

//

// ----> MHlpPrivObserver 

//

class MHlpPrivObserver

	{

public:

	virtual void HandleSearchEventL(TInt aEvent)=0;

	};

//

// ----> CHlpSQLBuffer 

//

class CHlpSQLBuffer : public CBase

	{

public:

	void ConstructL(TInt aBufferSize);

	CHlpSQLBuffer();

	~CHlpSQLBuffer();

	void AppendL(const TDesC& aDes);

	void AppendL(TInt aNum);

	void AppendSQLL(const TDesC& aDes);

	const TDesC& SearchStatement() const;

	void Reset();

private:

	void AppendTextL(const TDesC& aDes);

private:

	HBufC* iSQLStatement;

	};

//

// ----> CHlpSQLEvaluator 

//

class CHlpSQLEvaluator : public CActive

	{

public:

	static CHlpSQLEvaluator* NewL(TInt aPriority);

	static CHlpSQLEvaluator* NewLC(TInt aPriority);

	~CHlpSQLEvaluator();

	void Initialize(RDbView& aView, MHlpPrivObserver& aObserver);

protected:

	virtual void RunL();

	virtual void DoCancel();

private:

	void Start();

	CHlpSQLEvaluator(TInt aPriority);

private:

	MHlpPrivObserver* iObserver;

	RDbView* iView;

	};

//

// ----> CHlpSQLSearch 

//

class CHlpSQLSearch : public CBase, public MHlpPrivObserver

	{

public:

	static CHlpSQLSearch* NewL(MHlpDbObserver& aObserver);

	~CHlpSQLSearch();

public:

	void SetDatabase(CHlpDatabase& aDatabase);

	void SearchL(TInt aType, const TDesC& aCriterion);

	void CancelEvaluator();

	inline RDbView& View() const;

private:

	void ContextSearchL(const TDesC& aCriterion);

	void IndexIdSearchL(const TDesC& aCriterion);

	void TopicIdSearchL(const TDesC& aCriterion);

	void TextSearchL(const TDesC& aCriterion, TBool aFullText=EFalse);

private:

	void IndexListL();

	void CategoryListL();

	void TopicListForCategoryL(const TDesC& aCriterion);

	void TopicListForCategoryUIDL(const TDesC& aCriterion);

	void TopicIdSearchL();

	void BuildViewL();

	void Reset();

private: // observer stuff

	void HandleSearchEventL(TInt aEvent);

	inline void ReportEventToObserverL(TInt aEvent)		{ iObserver->HandleDbEventL(aEvent); }

private:

	CHlpSQLSearch(MHlpDbObserver& aObserver);

	void ConstructL();

private:

	enum TFlags

		{

		EFlagsNull					= 0x0000,

		EFlagsPerformSearch			= 0x0001,

		EFlagsAsynchronousSearch	= 0x0002,

		EFlagsHaveValidDatabase		= 0x0004

		};

private:

	TUint iFlags;

	CHlpSQLBuffer* iSQLStatement;

	CHlpSQLEvaluator* iSQLEvaluator;

	CHlpDatabase* iDatabase;

	RDbView* iView;

	MHlpDbObserver* iObserver;

	};

inline RDbView& CHlpSQLSearch::View() const

	{

	return *iView;

	}

#endif