/*

* Copyright (c) 2010 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: 

*

*/

// INCLUDE FILES

#include <e32svr.h>

#include "common.h"

#include "SearchClient.pan"

#include "CCPixSearcher.h"

#include "MCPixSearcherObserver.h"

#include "SearchServerCommon.h"

// CCPixSearcher::NewL()

// Two-phased constructor.

EXPORT_C CCPixSearcher* CCPixSearcher::NewL(RSearchServerSession& aSearchServerSession, const TDesC& aDefaultSearchField)

	{

	CCPixSearcher* self = NewLC(aSearchServerSession, aDefaultSearchField);

	CleanupStack::Pop( self );

	return self;

	}

// CCPixSearcher::NewLC()

// Two-phased constructor.

EXPORT_C CCPixSearcher* CCPixSearcher::NewLC(RSearchServerSession& aSearchServerSession, const TDesC& aDefaultSearchField)

	{

	CCPixSearcher* self = new ( ELeave ) CCPixSearcher(aSearchServerSession);

	CleanupStack::PushL( self );

	self->ConstructL(aDefaultSearchField);

	return self;

	}

// CCPixSearcher::ConstructL()

// Symbian 2nd phase constructor can leave.

void CCPixSearcher::ConstructL(const TDesC& aDefaultSearchField)

	{

	User::LeaveIfError( iSubSession.Open(iSearchServerSession) );

	iDefaultSearchField = aDefaultSearchField.AllocL(); 

	}

// CCPixSearcher::CCPixSearcher()

// C++ default constructor can NOT contain any code, that might leave.

CCPixSearcher::CCPixSearcher(RSearchServerSession& aSearchServerSession)

	: CActive( EPriorityStandard ),

	  iState( EStateNone ),

	  iIsDatabaseOpen( EFalse ),

	  iSearchServerSession( aSearchServerSession ),

	  iBaseAppClass( 0 ) 

	{

	CActiveScheduler::Add( this );

	}

// CCPixSearcher::~CCPixSearcher()

// Destructor.

EXPORT_C CCPixSearcher::~CCPixSearcher()

	{	

	Cancel(); // Causes call to DoCancel()

	iSubSession.Close();

	delete iDefaultSearchField;

	delete iQueryString;

	delete iBaseAppClass;

	delete iAnalyzer;

	}

EXPORT_C TBool CCPixSearcher::IsDatabaseOpen() const

	{

	return iIsDatabaseOpen; 

	}

EXPORT_C const TDesC& CCPixSearcher::GetBaseAppClass() const

{

	if (iBaseAppClass)

		return *iBaseAppClass;

	else

		return KNullDesC;

}

//

//

EXPORT_C void CCPixSearcher::OpenDatabaseL(const TDesC& aBaseAppClass)

	{

	if ( IsActive() )

		{

		User::Leave(KErrInUse);

		}

	iIsDatabaseOpen = EFalse; // If opening database fails, this is the safe assumption

	if( iBaseAppClass )

	    {

	    delete iBaseAppClass;

	    iBaseAppClass = NULL;

	    }

	iBaseAppClass = aBaseAppClass.AllocL();

	iSubSession.OpenDatabaseL(ETrue, *iBaseAppClass, *iDefaultSearchField);

	iIsDatabaseOpen = ETrue; 

	}

//

//

EXPORT_C void CCPixSearcher::OpenDatabaseL(MCPixOpenDatabaseRequestObserver& aObserver, const TDesC& aBaseAppClass)

	{

	if ( IsActive() )

		{

		User::Leave( KErrInUse);

		}

	iIsDatabaseOpen = EFalse; // If opening database fails, this is the safe assumption

	iObserver.iOpenDatabase = &aObserver;

	iState = EStateOpenDatabase;

	if(iBaseAppClass)

	    {

	    delete iBaseAppClass;

	    iBaseAppClass = NULL;

	    }

	iBaseAppClass = aBaseAppClass.AllocL();

	iSubSession.OpenDatabase(ETrue, *iBaseAppClass, *iDefaultSearchField, iStatus); // Create if not found

	SetActive(); 

	}

EXPORT_C void CCPixSearcher::SetAnalyzerL( const TDesC& aAnalyzer )

	{

	if ( !iIsDatabaseOpen ) 	User::Leave(KErrNotReady);

	if ( IsActive() ) 			User::Leave(KErrInUse);

	iSubSession.SetAnalyzerL( aAnalyzer ); 

	}

EXPORT_C void CCPixSearcher::SetAnalyzerL( MCPixSetAnalyzerRequestObserver& aObserver, const TDesC& aAnalyzer )

	{

	if ( !iIsDatabaseOpen ) 	User::Leave(KErrNotReady);

	if ( IsActive() ) 			User::Leave(KErrInUse);

	iAnalyzer = aAnalyzer.AllocL(); 

	iObserver.iSetAnalyzer = &aObserver;

	iState = EStateSetAnalyzer; 

	iSubSession.SetAnalyzer( aAnalyzer, iStatus );

	SetActive(); 

	}

// CCPixSearcher::FormQueryString()

// Suport method for SearchL-methods

HBufC* CCPixSearcher::FormQueryStringL(const TDesC& aQueryString, const TDesC& aDocumentField)

	{

	// Search with the specified field

	if ( aDocumentField != KNullDesC )

		{

		HBufC* queryString = HBufC::NewL(aQueryString.Length() + aDocumentField.Length() + 1);

		TPtr searchTermsPtr = queryString->Des();

		searchTermsPtr.Append(aDocumentField);

		searchTermsPtr.Append(':');

		searchTermsPtr.Append(aQueryString);

		return queryString; 

		}

	// Search with the default field

	else 

		{

		// Allocate search terms

		return aQueryString.AllocL();	

		}

	}

// CCPixSearcher::Search()

// Issues a new search

EXPORT_C TInt CCPixSearcher::SearchL(const TDesC& aQueryString, const TDesC& aDocumentField)

	{

	PERFORMANCE_LOG_START("CCPixSearcher::SearchL");

	if ( !iIsDatabaseOpen ) 	

		User::Leave( KErrNotReady );

	if ( IsActive() )

		{

		User::Leave(KErrInUse);

		}

	HBufC* query = FormQueryStringL( aQueryString, aDocumentField ); 

	CleanupStack::PushL( query ); 

	iSubSession.SearchL( *query );

	CleanupStack::PopAndDestroy( query ); 

	return iSubSession.GetEstimatedDocumentCount();

	}

EXPORT_C void CCPixSearcher::SearchL(MCPixSearchRequestObserver& aObserver, const TDesC& aQueryString, const TDesC& aDocumentField)

	{

    PERFORMANCE_LOG_START("CCPixSearcher::SearchL");

	if ( !iIsDatabaseOpen ) 	User::Leave( KErrNotReady );

	if ( IsActive() )

		{

		User::Leave(KErrInUse);

		}

	delete iQueryString;

	iQueryString = NULL;

	iQueryString = FormQueryStringL( aQueryString, aDocumentField ); 

	iObserver.iSearch = &aObserver;

	iState = EStateSearch;

	iSubSession.Search( *iQueryString, iStatus );

	}

EXPORT_C CSearchDocument* CCPixSearcher::GetDocumentL(TInt aIndex)

    {

    PERFORMANCE_LOG_START("CCPixSearcher::GetDocumentL");

	if ( !iIsDatabaseOpen ) 	User::Leave( KErrNotReady );

	if ( IsActive() )

		{

		User::Leave(KErrInUse);

		}

	return iSubSession.GetDocumentL(aIndex);

    }

EXPORT_C void CCPixSearcher::GetDocumentL(TInt aIndex, MCPixNextDocumentRequestObserver& aObserver)

    {

    PERFORMANCE_LOG_START("CCPixSearcher::GetDocumentL");

    if ( !iIsDatabaseOpen ) 	User::Leave( KErrNotReady );

	if ( IsActive() )

		{

		User::Leave(KErrInUse); // Need ::RunError to handle this

		}

	iObserver.iNextDocument = &aObserver;

	iState = EStateGetDocument;

	iSubSession.GetDocument(aIndex, iStatus);

    }

// CCPixSearcher::RunL()

// Invoked to handle responses from the server.

void CCPixSearcher::RunL()

	{

	// NOTE: Should we do cleanup here (!)

	// Observer might be replaced during observer call

	TObserver observer = iObserver; 

	iObserver.iAny = NULL; 

	TState oldState = iState; 

	iState = EStateNone;

	switch ( oldState )

		{

		case EStateOpenDatabase:

			iIsDatabaseOpen = (iStatus.Int() == KErrNone); // Inform the observer about the database

			if ( observer.iOpenDatabase )

				observer.iOpenDatabase->HandleOpenDatabaseResultL( iStatus.Int() );

			break;

		case EStateSetAnalyzer:

			delete iAnalyzer; iAnalyzer = NULL; // cleanup

			if ( observer.iSetAnalyzer ) {

				observer.iSetAnalyzer->HandleSetAnalyzerResultL( iStatus.Int() );

			}

			break;

		case EStateSearch:

			delete iQueryString; iQueryString = NULL; // cleanup

			// Fetch search results and call back at the observer

			iEstimatedResultsCount = iSubSession.GetEstimatedDocumentCount();

			if ( observer.iSearch )

				observer.iSearch->HandleSearchResultsL(iStatus.Int(), iEstimatedResultsCount);

			break;

		case EStateGetDocument:

		    {

		    // Fetch search results and call back at the observer

		    CSearchDocument* document = 0;

		    TRAPD( err, document = iSubSession.GetDocumentObjectL() );

		    if ( observer.iNextDocument )

		        {

		        if ( err == KErrNone )

		            {

		            observer.iNextDocument->HandleDocumentL(iStatus.Int(), document);

		            }

		        else

		            {

		            observer.iNextDocument->HandleDocumentL(err, document);

		            }

		        }

		    }

		    break;

		case EStateNone:

		    // Do nothing, dont panic.

		    break;

		default:

		    User::Panic(KSearchClient, ESearchClientBadState);

		    }

	}

// CCPixSearcher::DoCancel()

// Cancels any outstanding operation.

void CCPixSearcher::DoCancel()

	{

	iState = EStateNone;

	iSubSession.CancelAll();

	}

// CCPixSearcher::RunError()

// Don't propagate error.

TInt CCPixSearcher::RunError(TInt /* aError */ )

	{

	iSubSession.CancelAll();

	return KErrNone;

	}

// End of File