/*

* Copyright (c) 2002-2009 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:  Add, update and remove items in DB.*

*/

#ifndef __MDSSQLOBJECTMANIPULATE_H__

#define __MDSSQLOBJECTMANIPULATE_H__

// INCLUDE FILES

#include <e32base.h>

#include <hash.h>

#include "mdscommoninternal.h"

#include "mdsclausebuffer.h"

// FORWARD DECLARATION

class CMdSSqLiteConnection;

class CMdsSchema;

class CMdCFolder;

class RMdsStatement;

class CMdsNamespaceDef;

class CMdsObjectDef;

class CMdsPropertyDef;

class CMdCSerializationBuffer;

class CMdsClauseBuffer;

class RRowData;

class TColumn;

class CMdSObjectLockList;

class CMdSServerSession;

class RMdsStatement;

// CLASS DECLARATION

/**

 *

 */

class CMdSIdentifierGenerator: public CBase

	{

    public: // Constructors and destructor

	    /**

	    * Two-phased constructor.

	    * @param aPool, reference to pool for reserve database connection.

        * @return Pointer to CMdSIdentifierGenerator object.

	    */

        static CMdSIdentifierGenerator* NewL();

	    /**

	    * Two-phased constructor.

	    * @param aPool, reference to pool for reserve database connection.

	    * @return Pointer to CMdSIdentifierGenerator object.

	    */

        static CMdSIdentifierGenerator* NewLC();

        /**

        * Destructor.

        */

        virtual ~CMdSIdentifierGenerator();

		/**

		 * Set guid to generated ones if both are 0

		 */

		void GenerateGuid( TInt64& aGuidHigh, TInt64& aGuidLow );

		/**

		 * Return unique uri

		 * method require unique guid's

		 */

		HBufC* GenerateUriL( const CMdsObjectDef& aObjectDef, 

				const TInt64& aGuidHigh, const TInt64& aGuidLow ) const;

    private: // Private constructors

        /**

        * CMdSIdentifierGenerator.

        * C++ default constructor.

        */        

        CMdSIdentifierGenerator( )

        	{

        	iDigest = NULL;

        	}

        /**

        * ConstructL.

        * 2nd phase constructor.

        */        

        void ConstructL( );

	private: //Internal variables

		TInt64 iImei;

		TInt64 iLastTime;

		CMessageDigest* iDigest;

	};

/**

 * CMdSSqlObjectManipulate converts object handling  

 * instructions to an SQL clause.

 */

class CMdSSqlObjectManipulate: public CBase

	{

    public: // Constructors and destructor

	    /**

	    * Two-phased constructor.

	    * @param aPool, reference to pool for reserve database connection.

        * @return Pointer to CMdSSqlObjectManipulate object.

	    */

        static CMdSSqlObjectManipulate* NewL( const CMdsSchema& aSchema, 

        		CMdSObjectLockList& aLockList );

	    /**

	    * Two-phased constructor.

	    * @param aPool, reference to pool for reserve database connection.

	    * @return Pointer to CMdSSqlObjectManipulate object.

	    */

        static CMdSSqlObjectManipulate* NewLC( const CMdsSchema& aSchema, 

        		CMdSObjectLockList& aLockList );

        /**

        * Destructor.

        */

        virtual ~CMdSSqlObjectManipulate();

    private: // Private constructors

        /**

        * CSqlObjectManipulate.

        * C++ default constructor.

        */        

        CMdSSqlObjectManipulate( const CMdsSchema& aSchema, 

        		CMdSObjectLockList& aLockList );

        /**

        * ConstructL.

        * 2nd phase constructor.

        */        

        void ConstructL( );

    public: // Public functions

		/**

		 * Add new object to DB (not using any transaction system)

		 *

		 * @param aBuffer serialized object with properties and freeText

		 * @return new added object id

		 */

		TItemId AddObjectL( CMdSSqLiteConnection& aConnection, 

				CMdCSerializationBuffer& aBuffer, 

				RMdsStatement& aMdsBaseObjStatement, RMdsStatement& aMdsObjStatement,

				const CMdSServerSession* aServerSession = NULL );

		/**

		 * Really add freetext to DB

		 * 

		 * @param aWord word to add

		 * @param aObjectId owner of freetext object id

		 * @param aPosition position

		 * @param aSearch search for existing freetext in DB

		 */

		TUint32 AddFreeTextToDBL( TPtrC16& aWord, TItemId aObjectId, 

				TInt32 aPosition, TBool aSearch = ETrue );

		/**

		 * Add new freeText to DB (not using any transaction system)

		 *  (check if FreeText is in DB and in this case don't add it)

		 *

		 * @param aBuffer serialized object with FreeText

		 * @param aFreeTextCount freetext count

		 * @param aObjectId freetext owner object ID

		 * @return how many freeText was added to DB

		 */

		TInt AddFreeTextL( CMdCSerializationBuffer& aBuffer, TInt aFreeTextCount, TItemId aObjectId );

		/**

		 *	remove object by URI - just for internal use!

		 */

		void RemoveObjectForceL( const TDesC16& aUri, TItemId aObjectId );

		/**

		 * USE RemoveObjectForceL WITH CAUTION !!!

		 * THIS FUNCTION REMOVES OBJECT WITHOUT ANY CHECKING

		 * ONLY FOR INTERNAL USE !!!

		 */

		void RemoveObjectForceL( TItemId aObjectId );

		CMdCSerializationBuffer* CheckObjectL( TInt aResultBufferSize, 

				const TDesC& aUri, TDefId aNamespaceDefId );

		CMdCSerializationBuffer* CheckObjectL( TInt aResultBufferSize, 

				TItemId aId, TDefId aNamespaceDefId );

		CMdCSerializationBuffer* CheckObjectL( TInt aResultBufferSize, 

				CMdCSerializationBuffer& aIds, TDefId aNamespaceDefId );

		void CollectRemovedItemsL( RArray<TItemId>& aRemoveIds, 

				RArray<TItemId>& aObjectIds, RArray<TItemId>& aRelationIds, 

				RArray<TItemId>& aEventIds );

		/**

		 * Remove object using it's id

		 *

		 * @param aBuffer id's to remove

		 * @param aCount id's count

		 * @param aIdArray result id's

		 * @param aUserLevel not used - delete

		 * @param aLockList list of locked objects

		 */

		void RemoveObjectsByIdL( CMdCSerializationBuffer& aBuffer, TInt aCount,

				RArray<TItemId>& aIdArray, RArray<TItemId>& aRelationIds, 

				RArray<TItemId>& aEventIds );

		/**

		 * Remove object using it's URI's

		 *

		 * @param aBuffer URI's to remove

		 * @param aCount URI's count

		 * @param aIdArray result id's

		 * @param aUserLevel not used - delete

		 * @param aLockList list of locked objects

		 */

		void RemoveObjectsByUriL( CMdCSerializationBuffer& aBuffer, TInt aCount,

				RArray<TItemId>& aIdArray, RArray<TItemId>& aRelationIds, 

				RArray<TItemId>& aEventIds );

		/**

		 * search for object uri

		 *

		 * @param aUri object uri to search for

		 * @param aFlags return found object flags

		 * @return object id

		 */

		TItemId SearchObjectByUriL( const TDesC16& aUri, TUint32& aFlags );

		/**

		 * update freetext (add and remove)

		 */

		void UpdateFreeTextL( CMdCSerializationBuffer& aBuffer, TInt aCount,

				TItemId aObjectId );

		/**

		 * Update object

		 *

		 * @param aBuffer objects to update

		 * @param aLockList list of locked objects

		 */

		TItemId UpdateObjectL( CMdSSqLiteConnection& aConnection, 

				CMdCSerializationBuffer& aBuffer );

 	    /**

 	    * Runs garbage collection to database

 		* @param aDb The database connection

 		* @return next garbage collection start is needed?

 	    */

        TBool GarbageCollectionL();

		/**

		 * Set namespace for processing functions

		 */

        void SetNamespace( const CMdsNamespaceDef* aNamespaceDef );

        TItemId AddEventL( CMdSSqLiteConnection& aConnection, 

        		CMdCSerializationBuffer& aBuffer );

        TItemId AddRelationL( CMdSSqLiteConnection& aConnection, 

        		CMdCSerializationBuffer& aBuffer );

        void RemoveEventsL( CMdCSerializationBuffer& aBuffer, TInt aCount,

        		RArray<TItemId>& aIdArray );

        void RemoveRelationsL( CMdCSerializationBuffer& aBuffer, TInt aCount,

        		RArray<TItemId>& aIdArray );

        TItemId UpdateRelationsL( CMdSSqLiteConnection& aConnection, 

        		CMdCSerializationBuffer& aBuffer );

		/**

        * Add memory card media ID

		* @param aDb The database connection

        * @param aMediaId Memory card's media ID

        */

		void AddMemoryCardL(TUint32 aMediaId);

        /**

         * Get the latest memory card's media ID

 		 * @param aDb The database connection

         * @param aMediaId Returns the latest memory card's media ID

 		 * @leave KErrNotFound Not memory cards exist at all

         */

        void GetMemoryCardL(TUint32& aMediaId);

        /**

         * Checks if memory card's with given media ID exists

         * @param aMediaId memory card's media ID

         * @return memory card exists or not

         */

        TBool CheckMemoryCardL(TUint32 aMediaId);

        /**

         * Set media's media ID, drive and present state to DB.

         * 

         * @param aMediaId media ID

         * @param aMediaId drive

         * @param aMediaId present state

         */

        void SetMediaL(TUint32 aMediaId, TChar aDrive, TBool aPresentState);

        /**

         * Check if the media's with given media ID exist in DB and return 

         * drive and present state.

         * 

         * @param aMediaId given media ID

         * @param aMediaId drive

         * @param aMediaId present state

         * 

         * @return does media exist

         */

        TBool GetMediaL(TUint32 aMediaId, TChar& aDrive, TBool& aPresentState);

        /**

         * Get present medias' media IDs and drives.

         * 

         * @param aMediaInfoBuffer buffer where media infos are written

         * 

         * @return present media count

         */

        TInt32 GetPresentMediasL(TDes8& aMediaInfoBuffer);

        /**

         * Search file object which is in not present state.

 		 *

 		 * @param aDb The database connection

         * @param aMediaId Memory card's media ID

         * @param aUri File's URI

         * @param aFileInfo File information

         *

 		 * @leave KErrNotFound If not present state file object doesn't exist 

 		 *                     with given URI and media ID

         */

		TItemId SearchNotPresentFileL(TUint32 aMediaId, TDesC16& aUri, 

									  TMdSFileInfo& aFileInfo,

									  TFilePresentStates& aPlaceHolder, TBool& aNotPresentState);

        /** from MMdSObjectManipulate */

        void SetFilesToPresentL(const RArray<TItemId>& aObjectIds);

        /**

         * Sets object's relation to present state.

         * @param aObjectId object ID

         * @param aIdArray marked relations ID's

         */

        void SetRelationsToPresentL(TItemId aObjectId, 

        		RArray<TItemId>& aIdArray);

        /**

         * Sets all file objects from last memory card to not present state.

 		 * @param aMediaId Memory card's media ID

         * @param aObjectIds Object IDs of those object which are set to not 

         *                   present state

         */

        void SetFilesToNotPresentL(TUint32 aMediaId, TBool aStartUp, RArray<TItemId>& aObjectIds);

        /**

         * Sets file objects relations from last memory card to not present 

         * state.

         *

         * @param aMediaId Memory card's media ID

         * @param aRelationIds changed relation id's

         */

        void SetRelationsToNotPresentL(TUint32 aMediaId, 

        		RArray<TItemId>& aRelationIds);

        /**

         * Removes all file objects which has given media ID and are in not 

         * present.

 		 *

         * @param aMediaId Memory card's media ID

         */

        void RemoveFilesNotPresentL(TUint32 aMediaId, RArray<TItemId>* aObjectIds);

		/**

		 * Get schema version from DB

		 * @param aConnection The database connection

		 * @param aMajorVersion schema major version

		 * @param aMinorVersion schema minor version

		 */

		void GetSchemaVersionL(TInt& aMajorVersion, TInt& aMinorVersion);

		/**

		 * Set object to "present" state bu GUID

		 *

		 * @leave KErrNotFound MdE can't find object in "not present" state 

		 *                     with matching GUID

		 */

		void SetObjectToPresentByGuidL( 

				const TInt64& aGuidHigh, const TInt64& aGuidLow );

		/**

         * Change path of objects, which match to the old path, to the new 

         * path.

         *

         * @param aOldPath the old path 

         * @param aNewPath the new path

         * @param aObjectIds IDs of the change objects

         */

		void ChangePathL(const TDesC& aOldPath, const TDesC& aNewPath, 

				RArray<TItemId>& aObjectIds);

		/**

		 * Change C-drive media id and update it to all objects that have the old id.

		 */

		void ChangeMediaIdL();

		/**

		 * Get removed relation items

		 * 

		 * @param aBuffer buffer to fill with returned items

		 * @param aRemovedRelations removed relations

		 * @param aAdditionalRemovedRelations possible additional removed relations

		 */

		void GetRemovedRelationItemsL( CMdCSerializationBuffer& aBuffer,

				const RArray<TItemId>& aRemovedRelations,

				const RArray<TItemId>& aAdditionalRemovedRelations );

		/**

		 * Set/reset "binary composing to file" pending flag to objects

		 * 

		 * @param aObjectIds object IDs

		 * @param aReset when EFalse flags are setted and when ETrue flags are 

		 *               resetted

		 */

		void SetPendingL(const RArray<TItemId>& aObjectIds, TBool aReset);

		/**

		 * Get count of objects with "binary composing to file" pending flag

		 * 

		 * @param aObjectDefId object def ID

		 * 

		 * @return if >= 0, object count is returned, otherwise error code is 

		 *         returned

		 */

		TInt GetPendingCountL(TDefId aObjectDefId);

		/**

		 * Get objects with "binary composing to file" pending flag

		 * 

		 * @param aObjectDefId object def ID

		 * @param aBufferSize maximum ID count of buffer

		 * @param aObjectIds returned object IDs

		 * 

		 * @return if > 0, there was not enough space in buffer, otherwise 

		 *         error code is returned

		 */

		TInt GetPendingL(TDefId aObjectDefId, TInt aBufferSize, 

				RArray<TItemId>& aObjectIds);

		void CheckMassStorageMediaIdL( const TUint32 aMediaId );

    protected: // personal methods

		/**

		 * Add single property from aBuffer and adds it to proper clause and 

		 * row data.

		 *

		 * @param aBuffer serialized property

		 * @param aObjectDef definition of current object

		 * @param aBaseObjectClause clause describing base object

		 * @param aObjectClause clause describing current object

		 * @param aBaseObjectDataRow data row contains base object values

		 * @param aObjectDataRow data row contains current object values

		 * @return new property definition

		*/		 

		const CMdsPropertyDef& ReadPropertyL( 

				CMdCSerializationBuffer& aBuffer, 

				const CMdsObjectDef& aObjectDef, 

				CMdsClauseBuffer& aBaseObjectClause, 

				CMdsClauseBuffer& aObjectClause,

                RRowData& aBaseObjectDataRow, RRowData& aObjectDataRow, 

                TUint8& aFlags );

		/**

		 * Search in DB for freeText

		 *

		 * @param aFreeText freetext to search for

		 * @return if find ETrue, else EFalse

		 */

		TItemId FindFreeTextInDbL( TPtrC16 aFreeText );

        /**

	    * Deletes BaseObject.

	    */	   	    

        TBool DoGarbageCollectionL();    

	private: // Member data

		struct TLockBuffer

			{

			CMdsClauseBuffer* iBuffer;

			TBool iLock;

			};

    	TRequestStatus iTextSearcherDeleteFreeTextStatus;

    	TItemId iTextSearcherDeleteFreeTextObjectId;

    	TRequestStatus iTextSearcherAddFreeTextStatus;

    	TItemId iTextSearcherAddFreeTextObjectId;

		TItemId iCreationEventId;

		TItemId iDeletionEventId;

        /**

         * pointer to actual processing namespace

         */

        const CMdsNamespaceDef* iNamespaceDef;