/*

 * Copyright (c) 2008 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: CASqlQueryCreator declaration

 *

 */

#ifndef CASQLQUERYCREATOR_H

#define CASQLQUERYCREATOR_H

// INCLUDES

#include <e32std.h>

#include "cainnerquery.h"

// CLASS DECLARATION

class CCaSqlQuery;

class CCaInnerEntry;

class CCaInnerQuery;

class RSqlDatabase;

class TCaOperationParams;

/**

 *  @ingroup group_catorage.

 *  CaSqlQueryCreator Helper class which prepares sql statements for 

 *  execution.

 */

class CaSqlQueryCreator

    {

public:

    /**

     * The icon types.

     */

    enum TIconType

        {

        ENullIcon,

        ENullIconToRemove,

        EProperIcon

        };

    /**

     * Creates sql queries to be used to perform an add or 

     * update operation on the database.

     *

     * @param aEntry The entry to be added or updated in the database.

     * @param aList A list to fill in with queries neccessary for the operation.

     * @param iSqlDb The handle to the database needed for 

     * the created queries' member (RSqlStatement iStatement).

     */

    static void CreateAddQueryL( CCaInnerEntry* aEntry, RPointerArray<

            CCaSqlQuery>& aSqlQuery, RSqlDatabase& aSqlDb );

    /**

     * Creates an sql query to fetch data from the database.

     *

     * @param aQuery The query object which specifies 

     * the type of data to be fetched.

     * @param aSqlQuery The sql query created to select the data.

     */

    static void CreateGetEntriesQueryL( const CCaInnerQuery* aQuery,

            CCaSqlQuery* aSqlQuery );

    /**

     * Creates an sql query to fetch parents ids from the database.

     *

     * @param aEntryIdArray array with entries ids.

     * @param aSqlQuery The sql query created to select parents ids.

     * @param aParentIdArray array with groups ids.

     */

    static void CreateGetParentsIdsQueryL(

            const RArray<TInt>& aEntryIdArray, CCaSqlQuery* aSqlQuery,

            const RArray<TInt>& aParentIdArray );

    /**

     * Creates an sql query to remove data from the database.

     *

     * @param aList The result sql queries to be executed for remove.

     * @param aSqlDb The handle to the database needed for 

     * the created queries' member (RSqlStatement iStatement).

     */

    static void CreateRemoveQueryL( RPointerArray<CCaSqlQuery>& aSqlQuery,

            RSqlDatabase& aSqlDb );

    /**

     * Creates an sql query to fetch attributes for a given number of entries.

     *

     * @param aIdEntryCount The number of entry ids for which to get 

     * attributes.

     * @param aSqlQuery The result fetch attributes query.

     */

    static void CreateGetAttributesQueryL( const TInt aIdEntryCount,

            CCaSqlQuery* aSqlQuery );

    /**

     * Creates an sql query to modify touch data in the database.

     *

     * @param aSqlQuery The list of result queries needed for the touch 

     * operation.

     * @param aSqlDb The handle to the database needed for the created 

     * queries' member (RSqlStatement iStatement).

     */

    static void CreateTouchQueryL( RPointerArray<CCaSqlQuery>& aSqlQuery,

            RSqlDatabase& aSqlDb );

    /**

     * Creates an sql query to organize data within a group.

     *

     * @param aEntryIds The array of entry ids which are organized.

     * @param aParams The specific parameters describing the type of 

     * organize to be done.

     * @param aSqlDb The handle to the database needed for the created 

     * queries' member (RSqlStatement iStatement).

     * @param aSqlRemoveQueries A result array of remove queries to be 

     * executed.

     * @param aSqlPrependInsertQueries A result array of prepend insert 

     * queries queries to be executed.

     * @param aSqlInsertQueries A result array of insert queries to be 

     * executed.

     */

    static TBool CreateOrganizeQueryL( const RArray<TInt>& aEntryIds,

            TCaOperationParams aParams, RSqlDatabase& aSqlDb,

            RPointerArray<CCaSqlQuery>& aSqlQueries );

    /**

     * Populates a given query with a list of ids.

     *

     * @param The number of ids with which to populate the query.

     * @param aQuery The query where to set the result query text.

     * @param aSqlQueryText the sql text wich is populated 

     * with ids (in place of %S sequence);

     */

    static void PopulateQueryWithIdListL( const TInt aIdEntryCount,

            CCaSqlQuery* aQuery, const TDesC& aSqlQueryText );

    /**

     *

     */

    /**

     * Creates an sql query to custom sort order.

     *

     * @param aEntryIds The array of entry ids.

     * @param aSqlQuery A result array of insert queries to be executed.

     * @param aSqlDb The handle to the database. 

     */

    static void CreateCustomSortQueryL( const RArray<TInt>& aEntryIds,

            RPointerArray<CCaSqlQuery>& aSqlQuery,

            RSqlDatabase& aSqlDb );

    /**

     * Creates an sql query for finding an icon.

     *

     * @param aEntry The entry which has icon description.

     * @param aQuery The result query.

     */

    static void CreateFindIconQueryL( CCaInnerEntry* aEntry,

            CCaSqlQuery* aQuery);

private:

    /**

     * Creates an sql query to add an icon into the icon table.

     *

     * @param aEntry the entry for which to add an icon.

     * @param aQuery The result query.

     * @param aSqlDb The handle to the database needed for 

     * the created queries' member (RSqlStatement iStatement).

     */

    static void CreateAddIconQueryL( CCaInnerEntry* aEntry,

            CCaSqlQuery* aQuery, RSqlDatabase& aSqlDb );

    /**

     * Creates an sql query to add an icon for a new entry.

     *

     * @param aEntry the entry for which to add an icon.

     * @param aQuery The result query.

     * @param aSqlDb The handle to the database needed for 

     * the created queries' member (RSqlStatement iStatement).

     */

    static void CreateAddIconQueryForNewL( CCaInnerEntry* aEntry,

            CCaSqlQuery* aQuery, RSqlDatabase& aSqlDb );

    /**

     * Creates an sql query to add an icon for an existing entry.

     *

     * @param aEntry the entry for which to add an icon.

     * @param aQuery The result query.

     * @param aSqlDb The handle to the database needed for 

     * the created queries' member (RSqlStatement iStatement).

     */

    static void CreateAddIconQueryForUpdateL( CCaInnerEntry* aEntry,

            CCaSqlQuery* aQuery, RSqlDatabase& aSqlDb );

    /**

     * Creates an sql query to update an icon for an existing entry.

     *

     * @param aEntry the entry for which to update an icon.

     * @param aQuery The result query.

     */

    static void CreateUpdateIconQueryL( const CCaInnerEntry* aEntry,

            CCaSqlQuery* aQuery );

    /**

     * Creates an sql query to update an entry.

     *

     * @param aEntry The entry to be updated.

     * @param aQuery The result query.

     */

    static void CreateUpdateQueryEntryL( const CCaInnerEntry* aEntry,

            CCaSqlQuery* aQuery );

    /**

     * Creates an sql query to get a list of entries by the given ids.

     *

     * @param aIdEntryCount The number of entries to fetch.

     * @param aQuery The result query.

     */

    static void CreateGetEntriesQueryByIdL( const TInt aIdEntryCount,

            CCaSqlQuery* aQuery );

    /**

     * Creates an sql query to get a list of entries by query data.

     *

     * @param aQuery The query to analize for 

     * a specific selection (result list of entries).

     * @param aSqlQuery The result query.

     */

    static void CreateGetEntriesQueryByQueryL( const CCaInnerQuery* aQuery,

            CCaSqlQuery* aSqlQuery );

    /**

     * Helper function which creates a string with 

     * a list of id mappings. e.g. (id0,id1,id2)

     *

     * @param aIdEntryCount the number of entries to create the id list.

     * @param aEntryIdList The result text.

     * @param aColName column name with specified id.

     */

    static void CreateIdListL( const TInt aIdEntryCount,

            RBuf& aEntryIdList, const TDesC& aColName );

    /**

     * Modifies a given query with sort order information.

     *

     * @param aSortType The sort order type.

     * @param aQuery the query where the sort order will be included.

     * @param aSortByGroup Additional information if to sort within a group.

     */

    static void ModifyQueryForSortOrderL( 

            const CCaInnerQuery::TSortAttribute aSortType, 

            RBuf& aQuery, TBool aSortByGroup );

    /**

     * Modifies a given query with sort order last or most used.

     *

     * @param aSortType The sort order type.

     * @param aQuery the query where the sort order will be included.

     */

    static void ModifyQueryForSortOrderLastMostUsedL(

            const CCaInnerQuery::TSortAttribute aSortType, RBuf& aQuery );

    /**

     * Check if icon is set proper in CCaInnerEntry.

     *

     * @param aEntry The entry with icon params.

     * @return TIconType .

     */

    static TIconType CheckIconType( const CCaInnerEntry* aEntry );

    };

#endif // CASQLQUERYCREATOR_H