/*

* Copyright (c) 2007-2008 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: 

*

*/

#ifndef C_HNMDITEM_H

#define C_HNMDITEM_H

#include <e32base.h>

#include "hnmdmodel.h"

#include "hnmdeventmapping.h"

#include "hnqueryresultcollector.h"

class CHnMdQuery;

class CHnMdButton;

class CHnMdQueries;

class CHnMdNotifyRequests;

class CHnSuiteModel;

class CLiwGenericParamList;

class CLiwDefaultMap;

class THnIdGenerator;

class CHnFilter;

class CHnMdUiMapping;

class CHnMdMenuItem;

class CHnItemId;

class CHnMdSuite;

class CHnXmlModelProvider;

class CHnItemModel;

class CHnMenuItemModel;

class CHnActionModel;

class CHnMdToolbar;

struct THnMdCommonPointers;

class CHnConditionInterface;

/**

 * Item.

 *

 * This is the item's class. Each item (or items' group -

 * the count attribute has a value greater then 1) is represented

 * by an object of the CHnMdItem class.

 *

 * This class comprises different classes which are responsible for

 * conditions, queries, notifications (refreshing), etc.

 *

 * @lib hnmetadatamodel

 * @since S60 v5.0

 * @ingroup group_hnmetadatamodel

 */

NONSHARABLE_CLASS(CHnMdItem) : public CBase,

    public MHnQueryResultCollectorNotification

    {

public:

    /**

     * Standard factory method.

     *

     * since S60 v5.0

     * @param aElement Xml element.

     * @param aCmnPtrs Common pointers container.

     * @return Fully constructed object.

     */

    static CHnMdItem* NewL( TXmlEngElement aElement,

                                      THnMdCommonPointers* aCmnPtrs );

    /**

     * Standard factory method.

     *

     * since S60 v5.0

     * @param aElement Xml element.

     * @param aCmnPtrs Common pointers container.

     * @return Fully constructed object.

     */

    static CHnMdItem* NewLC( TXmlEngElement aElement,

                                       THnMdCommonPointers* aCmnPtrs );

    /**

     * Default destructor.

     */

    virtual ~CHnMdItem();

    /**

     * Updates an item.

     *

     * @param aGraphicalList A graphical list.

     * @param aId Item's identifier.

     * @param aResultMap A results map.

     * @return An error code.

     */

    void UpdateItemL( CHnSuiteModel* aGraphicalList, TInt aId,

            RHashMap< HBufC*, CLiwGenericParamList*>& aResultMap );

    /**

     * Compares entries.

     *

     * @param aSearchCriteria Search critieria item id.

     * @return True if this item matches aSearchCriteria.

     */

    TBool CompareItems( CHnItemId* aSearchCriteria );

    /**

     * Evaluates an item.

     *

     * @since S60 v3.2

     * @param aSuiteModel A suite's model.

     * @param aParamList Paramters of the evaluation.

     * @param aItemPosition A position of an item in the aParamList.

     */

    void EvaluateItemL( CHnSuiteModel & aSuiteModel,

                        CLiwGenericParamList& aParamList,

                        TInt aItemPosition );

    /**

     * Marks according to filter which item should be evaluated.

     *

     * @since S60 5.0

     * @param aFilter Filter.

     */

    void MarkEvaluationL( CHnFilter& aFilter );

    /**

     * Sets template.

     *

     * @param aOption Option - an identifier of alternative template bo be set.

     */

    void SetAlternativeTemplateL( TInt aOption );

    /**

     * Sets edit mode version of the item.

     *

     * @param aEditModeItem Edit mode item.

     * @return Meta data model of the edit mode version.

     */

    void SetAlternativeModeItem(CHnMdItem* aEditModeItem);

    /**

     * Sets edit mode version of the item.

     * Transfers ownership.

     *

     * @return Meta data model of the edit mode version.

     */

    CHnMdItem* TakeAlternativeModeItem();

     /**

      * Checks if mode version of the item is present.

      *

      * @return True if an item has an alternative model to be set.

      */

     TBool HasAlternativeModeItem() const;

     /**

      * Template property getter.

      *

      * @return The name of the template.

      */

     IMPORT_C TDesC8& Template();

     /**

      * Type property getter.

      *

      * @return Type of an item.

      */

     IMPORT_C TDesC8& Type();

     /**

      * Type property getter.

      *

      * @return Type of an item.

      */

     IMPORT_C TDesC8& Uid();

     // from queries collector

     /**

      * Triggered when results have been collected.

      *

      * @param aResults Results.

      */

     virtual void ResultsCollectedL( CLiwGenericParamList* aResults );

private:

    /**

     * Sets edit mode item.

     *

     * @param aElement Xml element.

     */

    void SetEditModeItemL( TXmlEngElement aElement );

    /**

     * Sets count.

     *

     * @param aElement Xml element.

     */

    void SetCountL( TXmlEngElement aElement );

    /**

     * Sets template.

     *

     * @param aAttr Xml attribute.

     */

    void SetTemplateL( TXmlEngAttr aAttr );

    /**

     * Sets queries.

     *

     * @param aElement Xml element.

     */

    void SetQueriesL( TXmlEngElement aElement );

    /**

     * Sets item id.

     *

     * @param aItemElement Xml element.

     */

    void SetItemIdL( TXmlEngElement aItemElement );

    /**

     * Sets item id.

     *

     * @param aAttrFileName Xml attribute - file name.

     * @param aId Xml attribute - item's identifier.

     */

    void SetItemId2L( TXmlEngAttr aAttrFileName, TXmlEngAttr aId );

    /**

     * Evaluates item.

     *

     * @param aSuiteModel A model of the suite.

     * @param aItemId Item's id.

     * @param aParamList Parameters of the evaluation in the form of the CLiwGenericParamList.

     * @param aItemPosition A position of the record of the parameters list.

     * @return Error code.

     */

    TInt EvaluateItemL( CHnSuiteModel & aSuiteModel,

            const CHnItemId* aItemId, CLiwGenericParamList& aParamList,

            TInt aItemPosition );

    /**

     * Evaluates item.

     *

     * @param aSuiteModel A model of the suite.

     * @param aParamList Parameters of the evaluation in the form of the CLiwGenericParamList.

     * @param aItemPosition A position of the record of the parameters list.

     */

    void EvaluateItemItselfL( CHnSuiteModel & aSuiteModel,

            CLiwGenericParamList& aParamList, TInt aItemPosition );

    /**

     * Sets template attribute on item model.

     *

     * @param aItemModel Item's model.

     */

    void SetTemplateL( CHnItemModel* aItemModel );

    /**

     * Mode.

     *

     * @returns Mode of an item, e.g. normal / edit mode.

     */

    TMdMode Mode();

    /**

     * Retrieves values from outputs containing the [$index] string.

     * 

     * @param aValues Array containing found strings.

     * @param aElement The xml element.

     * @return Number of found strings.

     */

    TInt GetIndexValuesFromOutputsL( RPointerArray<HBufC8> &aValues, TXmlEngElement aElement );

private:

    /**

     * Standard constructor.

     */

    CHnMdItem();

    /**

     * EPOC default constructor for performing 2nd stage construction.

     *

    * @param aElement Xml element.

    * @param aCmnPtrs Common pointers containter.

     */

    void ConstructL( TXmlEngElement aElement,THnMdCommonPointers* aCmnPtrs );

    /**

     * Fills item model with data.

     *

     * @param aItemModel Model to be filled.

     * @param aQueriesResultsList Parameters of in the form of the CLiwGenericParamList.

     * @param aPosition A position of the record in the parameters list.

     * @return True if filling finihed with success.

     */

    TBool FillItemModelL( CHnItemModel* aItemModel,

            const CLiwGenericParamList& aQueriesResultsList,

            TInt aPosition );

    /**

     * Fills item model with menu items created from meta data model.

     *

     * @param aItemModel Model to be filled.

     * @param aQueriesResultsList Parameters of in the form of the CLiwGenericParamList.

     * @param aPos A position of the record in the parameters list.

     */

    void FillItemModelWithMenuItemsL( CHnItemModel* aItemModel,

            const CLiwGenericParamList& aQueriesResultsList, TInt aPos = 0 );

    /**

     * Fills item model with toolbar created from meta data model.

     *

     * @param aItemModel Model to be filled.

     * @param aQueriesResultsList Parameters of in the form of the CLiwGenericParamList.

     * @param aPos A position of the record in the parameters list.

     */

    void FillItemModelWithToolbarL( CHnItemModel* aItemModel,

            const CLiwGenericParamList& aQueriesResultsList, TInt aPos = 0 );

    /**

     * Fills item model with MSK created from meta data model.

     *

     * @param aItemModel Model to be filled.

     * @param aQueriesResultsList Parameters of in the form of the CLiwGenericParamList.

     * @param aPos A position of the record in the parameters list.

     */

    void FillItemModelWithMiddleSoftKeyL( CHnItemModel* aItemModel,

            const CLiwGenericParamList& aQueriesResultsList, TInt aPos = 0 );

    /**

     * Fills menu model with data from mdmenuitem.

     *

     * @param aSuiteModel Suite's model.

     * @param aItemId Item's identifier.

     * @param aQueriesResultsList Queries results in form of the CLiwGenericParamList.

     * @param aItemModelNumber Item's model number.

     * @param aItemPos Position of an item in the queries results list.

     * @return KErrNone if an item was successfully added.

     */

    TInt AddItemL( CHnSuiteModel & aSuiteModel, TInt aItemId,

            const CLiwGenericParamList& aQueriesResultsList,

            TInt aItemModelNumber,

            TInt aItemPos );

    /**

     * Fills menu model with data from mdmenuitem.

     *

     * @param aSuiteModel Suite's model.

     * @param aItemId Item's identifier.

     * @param aQueriesResultsList Queries results in form of the CLiwGenericParamList.

     * @param aItemPos Position of an item in the queries results list.

     * @return KErrNone if an item was successfully updated.

     */

    TInt UpdateItemL( CHnSuiteModel & aSuiteModel, TInt aItemId,

            const CLiwGenericParamList& aQueriesResultsList, TInt aItemPos );

    /**

     * Fills menu model with data from mdmenuitem.

     *

     * @param aSuiteModel Suite's model.

     * @param aId Items identifier.

     */

    void RemoveItemL( CHnSuiteModel & aSuiteModel, TInt aId );

    /**

     * Sets move/remove locked attribute.

     *

     * @param aElement Xml item element.

     */

    void SetAttributesL( TXmlEngElement aElement );

    /**

     * Sets item type string.

     *

     * @param aElement Xml item element.

     */

    void SetTypeL( TXmlEngElement aElement );

    /**

     * Sets uid string.

     *

     * @param aElement Xml item element.

     */

    void SetUidL( TXmlEngElement aElement );

    /**

     * Sets delete / move locked attributes.

     *

     * @param aItemModel Model to be filled.

     * @param aQueriesResultsList Parameters of in the form of the CLiwGenericParamList.

     * @param aPos A position of the record in the parameters list.

     */

    void SetDeleteMoveAttributesL( CHnItemModel* aItemModel,

            const CLiwGenericParamList& aQueriesResultsList, TInt aPos );

    /**

     * Sets custom id.

     *

     * @param aElement Xml item element.

     */

    void SetCustomIdL( TXmlEngElement aElement );

    /**

     * Sets middle soft key.

     *

     * @param aElement Xml item element.

     * @param aCmnPtrs Common pointers.

     */

    void SetMiddleSoftKeyL( TXmlEngElement aElement,

            THnMdCommonPointers* aCmnPtrs );

    /**

     * Checks if an item is valid (the condition returns true).

     *

     * @param aQueryResults Query results.

     * @param aPos Position of the item in the results list.

     * @return ETrue or EFalse dependeing on whether the item is valid.

     */

    TBool IsValidL( const CLiwGenericParamList& aQueryResults, TInt aPos );

    /**

     * Sets the evaluated remove lock to the item model.

     *

     * @param aQueryResults Query results.

     * @param aPos Position of the item in the results list.

     * @param aItemModel Item model to set custom id on.

     */

    void SetRemoveLockedL( const CLiwGenericParamList& aQueryResults,

            TInt aPos, CHnItemModel* aItemModel );

    /**

     * Sets the evaluated move lock to the item model.

     *

     * @param aQueryResults Query results.

     * @param aPos Position of the item in the results list.

     * @param aItemModel Item model to set custom id on.

     */

    void SetMoveLockedL( const CLiwGenericParamList& aQueryResults,

            TInt aPos, CHnItemModel* aItemModel );

    /**

     * Sets the evaluated type to the item model.

     *

     * @param aQueryResults Query results.

     * @param aPos Position of the item in the results list.

     * @param aItemModel Item model to set custom id on.

     */

    void SetTypeL( CHnItemModel* aItemModel,

            const CLiwGenericParamList& aQueryResults, TInt aPos );

    /**

     * Sets the uid to the item model.

     *

     * @param aQueryResults Query results.

     * @param aPos Position of the item in the results list.

     * @param aItemModel Item model to set custom id on.

     */

    void SetUidL( CHnItemModel* aItemModel,

            const CLiwGenericParamList& aQueryResults, TInt aPos );

    /**

     * Sets custom id.

     *

     * @param aItemModel Model to be filled.

     * @param aParams Parameters of in the form of the CLiwGenericParamList.

     * @param aPos A position of the record in the parameters list.

     */

    void SetCustomIdL( CHnItemModel* aItemModel,

          const CLiwGenericParamList& aParams, TInt aPos );

    /**

     * Returns the maximum possible number of items.

     *

     * @return Maximum number of items.

     */

    TInt GetItemsMaxCountL();

private: // data

    /**

     * Own - edit mode version of the item.

     * However TakeAlternativeModeItem transfers ownership.

     */

    CHnMdItem *iAlternativeModeItem;

    /**

     * Count.

     */

    RBuf8 iCount8;

    /**

     * Template.

     */

    RBuf8 iTemplate;

    /**

     * Own - List of allowable widget types.

     */

    CDesC8Array * iAllowableTemplate;

    /**

     * Item id.

     */

    CHnItemId* iItemId;

    /**

     * Queries.

     */

    CHnMdQueries* iQueries;

    /**

     * Notify Requests.

     */

    CHnMdNotifyRequests* iNotifyRequests;

    /**