/*

* 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 "CCPixSearch.h"

#include "CSearchDocument.h"

#include "common.h"

#include "SearchServerLogger.h"

#include "CCPixAsyncronizer.h"

#include "SearchServerHelper.h"

namespace {

/**

 * cpix_DocFieldEnum destroyer for TCleanupItem

 * @param aCpixDocFieldEnum CPix document

 */

void CpixDocFieldEnumDestroyer(TAny* aCpixDocFieldEnum)

	{

	cpix_DocFieldEnum_destroy( static_cast<cpix_DocFieldEnum*>( aCpixDocFieldEnum ) );

	}

} // namespace

CCPixSearch* CCPixSearch::NewL()

	{

	CCPixSearch* self = CCPixSearch::NewLC();

	CleanupStack::Pop(self);

	return self;

	}

CCPixSearch* CCPixSearch::NewLC()

	{

	CCPixSearch* self = new (ELeave) CCPixSearch();

	CleanupStack::PushL(self);

	self->ConstructL();

	return self;

	}

CCPixSearch::CCPixSearch()

	: iPendingTask(EPendingTaskNone)

	{

	}

CCPixSearch::~CCPixSearch()

	{

	delete iAsyncronizer;

	if ( iHits )

		{

		cpix_Hits_destroy( iHits );

		}

	delete iBaseAppClass;

	delete iDefaultSearchFieldZ;

	cpix_Query_destroy(iQuery);

	cpix_QueryParser_destroy(iQueryParser);

	cpix_Analyzer_destroy(iAnalyzer);

	cpix_IdxSearcher_releaseDb(iIdxDb);

	}

void CCPixSearch::ConstructL()

	{

	iAsyncronizer = CCPixAsyncronizer::NewL();

	}

void CCPixSearch::CancelAll(const RMessage2& aMessage)

	{

    if (iPendingTask == EPendingTaskSearch)

	    {

		iAsyncronizer->Cancel();

		cpix_CancelAction cancelAction = 

            cpix_IdxSearcher_cancelSearch(iIdxDb, iPendingJobId);

		LogCancelAction(cancelAction);

		cpix_ClearError(iIdxDb);

		aMessage.Complete(KErrNone);

		}

    else if (iPendingTask == EPendingTaskDocument)

    	{

		iAsyncronizer->Cancel();

		cpix_CancelAction cancelAction = 

            cpix_Hits_cancelDoc(iHits, iPendingJobId);

	   	LogCancelAction(cancelAction);

		cpix_ClearError(iHits);

	   	aMessage.Complete(KErrNone);

    	}

    else if ( iPendingTask != EPendingTaskNone )

        {

        // Do nothing here. Wait until asynchronous functions

        // completes and complete request after that.

        iAsyncronizer->CancelWhenDone(aMessage);

        }

    else 

        {

        // else must complete the message now

        aMessage.Complete(KErrNone);

        }

    iPendingTask = EPendingTaskNone;

	}

void CCPixSearch::LogCancelAction(cpix_CancelAction aCancelAction)

    {

#ifdef CPIX_LOGGING_ENABLED

    CPIXLOGSTRING2("Cancel action code %d", aCancelAction);

#endif // CPIX_LOGGING_ENABLED

    }

void CCPixSearch::CompletionCallback(void *aCookie, cpix_JobId aJobId)

	{

	CCPixSearch* object = (CCPixSearch*)aCookie;

	// Sanity check

	if (object == NULL || 

		object->iPendingJobId != aJobId)

		return;

	// Call the asyncronizers completion code

	CCPixAsyncronizer* asyncronizer = object->iAsyncronizer;

	asyncronizer->CompletionCallback();

	}

TBool CCPixSearch::SearchL(const TDesC& aSearchTerms, MCPixAsyncronizerObserver* aObserver, const RMessage2& aMessage)

    {

    PERFORMANCE_LOG_START("CCPixSearch::SearchL");

    if (iPendingTask != EPendingTaskNone)

        User::Leave(KErrInUse);

    // Destroy previous hits

    iDocumentCount = 0;

    cpix_Hits_destroy( iHits );

    iHits = NULL; 

    // Allocate search terms (allow zero termination)

    HBufC* searchTerms = HBufC::NewLC(aSearchTerms.Length() + 1);

    TPtr searchTermsPtr = searchTerms->Des();

    searchTermsPtr.Copy(aSearchTerms);

    // Destroy previous query

    cpix_Query_destroy( iQuery );

    iQuery = NULL;

    // Commit the new query

    iQuery = cpix_QueryParser_parse(iQueryParser, reinterpret_cast<const wchar_t*>(searchTermsPtr.PtrZ()) );

    SearchServerHelper::CheckCpixErrorL(iQuery, KErrQueryParsingFailed);

    // Cleanup terms

    CleanupStack::PopAndDestroy(searchTerms);

    // Commit the search

    if ( iQuery )

	    {

	    iPendingJobId = cpix_IdxSearcher_asyncSearch(iIdxDb, iQuery, (void*)this, &CompletionCallback);

	    SearchServerHelper::CheckCpixErrorL(iIdxDb, KErrDatabaseQueryFailed);

    	iPendingTask = EPendingTaskSearch;

	    iAsyncronizer->Start(ECPixTaskTypeSearch, aObserver, aMessage);

        return ETrue;

        }

    // Search was not committed

    return EFalse;

    }

TInt CCPixSearch::SearchCompleteL()

    {

    PERFORMANCE_LOG_START("CCPixSearch::SearchCompleteL");

    // Request is no more pending

    iPendingTask = EPendingTaskNone;

    // Get the hits

    iHits = cpix_IdxSearcher_asyncSearchResults(iIdxDb, iPendingJobId);

    SearchServerHelper::CheckCpixErrorL(iIdxDb, KErrDatabaseQueryFailed);

	iDocumentCount = cpix_Hits_length(iHits);

	SearchServerHelper::CheckCpixErrorL(iHits, KErrDatabaseQueryFailed);

	return iDocumentCount; 

    }

void CCPixSearch::GetDocumentL(TInt aIndex, MCPixAsyncronizerObserver* aObserver, const RMessage2& aMessage)

	{

	PERFORMANCE_LOG_START("CCPixSearch::GetDocumentL");

    if (iPendingTask != EPendingTaskNone)

        User::Leave(KErrInUse);

	if (aIndex<0 || aIndex >= iDocumentCount )

		{

		User::Leave(KErrDocumentAccessFailed);

		}

    iPendingTask = EPendingTaskDocument;

    iPendingJobId = cpix_Hits_asyncDoc(iHits, aIndex, &iCurrentCpixDocument, (void*)this, &CompletionCallback);

    if ( cpix_Failed(iHits) )

        {

        SearchServerHelper::LogErrorL(*(iHits->err_));

        cpix_ClearError(iHits);

        User::Leave(KErrDocumentAccessFailed);

        }

    iAsyncronizer->Start(ECPixTaskTypeGetDocument, aObserver, aMessage);

	}

CSearchDocument* CCPixSearch::GetDocumentCompleteL()

	{

	PERFORMANCE_LOG_START("CCPixSearch::GetDocumentCompleteL");

    // Request is no more pending

    iPendingTask = EPendingTaskNone;

	cpix_Hits_asyncDocResults(iHits, iPendingJobId);

	SearchServerHelper::CheckCpixErrorL(iHits, KErrDocumentAccessFailed);

	const wchar_t* documentId = cpix_Document_getFieldValue(&iCurrentCpixDocument, LCPIX_DOCUID_FIELD);

	SearchServerHelper::CheckCpixErrorL(&iCurrentCpixDocument, KErrDatabaseQueryFailed);

	TPtrC documentIdPtr(KNullDesC);

	if (documentId)

		documentIdPtr.Set(reinterpret_cast<const TUint16*>(documentId));

	const wchar_t* documentAppClass = cpix_Document_getFieldValue(&iCurrentCpixDocument, LCPIX_APPCLASS_FIELD);

	SearchServerHelper::CheckCpixErrorL(&iCurrentCpixDocument, KErrDatabaseQueryFailed);

	TPtrC documentAppClassPtr(KNullDesC);

	if (documentAppClass)

		documentAppClassPtr.Set(reinterpret_cast<const TUint16*>(documentAppClass));

	const wchar_t* documentExcerpt = cpix_Document_getFieldValue(&iCurrentCpixDocument, LCPIX_EXCERPT_FIELD);

	SearchServerHelper::CheckCpixErrorL(&iCurrentCpixDocument, KErrDatabaseQueryFailed);

	TPtrC documentExcerptPtr(KNullDesC);

	if (documentExcerpt)

		documentExcerptPtr.Set(reinterpret_cast<const TUint16*>(documentExcerpt));

	CSearchDocument* document = CSearchDocument::NewLC(documentIdPtr, documentAppClassPtr, documentExcerptPtr);

	cpix_DocFieldEnum* docFieldEnum = cpix_Document_fields(&iCurrentCpixDocument);

	// push to cleanup stack.

	CleanupStack::PushL( TCleanupItem(CpixDocFieldEnumDestroyer, docFieldEnum) );

	SearchServerHelper::CheckCpixErrorL(&iCurrentCpixDocument, KErrDocumentAccessFailed);

	cpix_Field field;

	while (cpix_DocFieldEnum_hasMore(docFieldEnum))

		{

		cpix_DocFieldEnum_next(docFieldEnum, &field);

		SearchServerHelper::CheckCpixErrorL(docFieldEnum, KErrDatabaseQueryFailed);

		const wchar_t* name = cpix_Field_name(&field);

		SearchServerHelper::CheckCpixErrorL(&field, KErrDatabaseQueryFailed);

		TPtrC namePtr( reinterpret_cast<const TUint16*>( name ) );

		if (    namePtr == TPtrC( (TUint16*)LCPIX_DOCUID_FIELD )

			 || namePtr == TPtrC( (TUint16*)LCPIX_APPCLASS_FIELD )

			 || namePtr == TPtrC( (TUint16*)LCPIX_EXCERPT_FIELD ) )

			{

			continue;  // These fields have already been added

			}

		const wchar_t* value = cpix_Field_stringValue(&field);

		SearchServerHelper::CheckCpixErrorL(&field, KErrDatabaseQueryFailed);

		TPtrC stringvalue( reinterpret_cast<const TUint16*>( value ) );

		document->AddFieldL(namePtr, stringvalue);

		}

	CleanupStack::PopAndDestroy(docFieldEnum);

	CleanupStack::Pop(document);

	return document;

	}

void CCPixSearch::SetAnalyzerL(const TDesC& aAnalyzer)

	{

	cpix_QueryParser_destroy( iQueryParser ); 

	iQueryParser = NULL; 

	cpix_Analyzer_destroy( iAnalyzer ); 

	iAnalyzer = NULL; 

	// Create analyzer

	cpix_Result result;

	HBufC* analyzer = HBufC::NewLC(aAnalyzer.Length() + 1);

	TPtr analyzerPtr = analyzer->Des();

	analyzerPtr.Copy(aAnalyzer);

	const wchar_t* cAnalyzer = reinterpret_cast<const wchar_t*>(analyzerPtr.PtrZ());

	iAnalyzer = cpix_Analyzer_create(&result, cAnalyzer);

	SearchServerHelper::CheckCpixErrorL(&result, KErrCannotCreateAnalyzer);

	CleanupStack::PopAndDestroy( analyzer ); 

	iQueryParser = 

		cpix_QueryParser_create(&result,

			reinterpret_cast<const wchar_t*>(iDefaultSearchFieldZ->Des().PtrZ()), 

			iAnalyzer);

	SearchServerHelper::CheckCpixErrorL(&result, KErrCannotCreateQueryParser);

	}

void CCPixSearch::OpenDatabaseL(const TDesC& aBaseAppClass, const TDesC& aDefaultSearchField)

	{

	// Release data associated with old database 

	delete iDefaultSearchFieldZ;

	iDefaultSearchFieldZ = NULL;

	delete iBaseAppClass;

	iBaseAppClass = NULL;

	cpix_IdxSearcher_releaseDb( iIdxDb );

	iIdxDb = NULL;

	// Allocate default search field (space for zero terminated)

	iDefaultSearchFieldZ = HBufC::NewL(aDefaultSearchField.Size() + 1);

	TPtr defaultSearchFieldPtr = iDefaultSearchFieldZ->Des();

	defaultSearchFieldPtr.Copy(aDefaultSearchField);

	// Allocate base app class (space for zero terminated)

	iBaseAppClass = HBufC8::NewL(aBaseAppClass.Size() + 1);

	TPtr8 baseAppClassPtr = iBaseAppClass->Des();

	baseAppClassPtr.Copy(aBaseAppClass);

    // Try to open database

    cpix_Result result;

    iIdxDb = 

		cpix_IdxSearcher_openDb(

			&result,

            reinterpret_cast<const char*>( baseAppClassPtr.PtrZ() ));

    SearchServerHelper::CheckCpixErrorL(&result, KErrCannotOpenDatabase);

	// Set default analyzer

	SetAnalyzerL(TPtrC((TUint16*)CPIX_ANALYZER_DEFAULT)); 

	}

TBool CCPixSearch::IsOpen()

	{

	return (iIdxDb != NULL);

	}