/*

* Copyright (c) 2007-2009 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:  Definition of CAS plug-in contact retriever

 *

*/

#ifndef CESMRCASPLUGINCONTACTRETRIEVER_H

#define CESMRCASPLUGINCONTACTRETRIEVER_H

#include <e32base.h>

//<cmail>

#include "mfsccontactsetobserver.h"

//</cmail>

// FORWARD DECLARATIONS

class MVPbkStoreContact;

class MFscContactSet;

class TFscContactActionPluginParams;

class MESMRCasPluginContactRetrieverObserver;

class CCalUser;

/**

 *  Create meeting Request plugin implementation.

 *  Contains implementation of create meeting request action plugin.

 *

 *  part contact action menu Ecom plugin based API

 */

NONSHARABLE_CLASS (CESMRCasPluginContactRetriever) :

        public CBase,

        public MFscContactSetObserver

    {

public: // Constructors and destructor

    /**

     * Two-phased constructor. Creates and initializes

     * CESMRCasPluginContactRetriever object. Ownership transferred to caller.

     *

     * @param aParams set of contact action plugin configuration parameters

     * @return Pointer to ContactRetriever object.

     */

    static CESMRCasPluginContactRetriever* NewL(

            const TFscContactActionPluginParams& aParams );

    /**

     * C++ Destructor.

     */

    virtual ~CESMRCasPluginContactRetriever( );

public: // From Interface

    void CanExecuteL(

            MFscContactSet& aContactSet,

            MESMRCasPluginContactRetrieverObserver& aObserver );

    void GetAttendeesL(

            MFscContactSet& aContactSet,

            MESMRCasPluginContactRetrieverObserver& aObserver );

    void Cancel();

private: // from MFscContactSetObserver

    void NextContactComplete( MVPbkStoreContact* aContact );

    void NextContactFailed( TInt aError );

    void NextGroupComplete( MVPbkStoreContact* aContact );

    void NextGroupFailed( TInt aError );

    void GetGroupContactComplete( MVPbkStoreContact* aContact );

    void GetGroupContactFailed( TInt aError );

private: // Implementation

    CESMRCasPluginContactRetriever(

            const TFscContactActionPluginParams& aParams );

    void ConstructL( );

    void StartIterationL();

    void HandleNextContactCompleteL( MVPbkStoreContact& aContact );

    void HandleNextGroupCompleteL( MVPbkStoreContact* aGroup );

    void NotifyFinished();

    void NotifyError( TInt aError );

private: // data

    /** States of operations */

    enum TLastEvent

        {

        EActionEventNextContact,

        EActionEventNextGroup,

        EActionEventGetGroupContact

        };

    /** State current operation */

    enum TOperation

        {

        EOperationCanExecute,

        EOperationGetAttendees

        };

    /// Own: Operation in progress

    TOperation iOperation;

    /// Own: Last event

    TLastEvent iLastEvent;

    /// Own: Fetched MR addresses

    RPointerArray<CCalUser> iAttendees;

    /// Own: Contact count with email

    TInt iContactCountWithEmail;

    /// Own: Total contact count

    TInt iContactCount;

    /// Ref: Current observer

    MESMRCasPluginContactRetrieverObserver* iObserver;

    /// Ref: Plugin parameters

    const TFscContactActionPluginParams& iParams;

    /// Ref: Contact set to be handled

    MFscContactSet* iContactSet;

    /// Own: Contact index in current group

    TInt iCurrentGroupContactIndex;

    /// Own: Contact count in current group

    TInt iCurrentGroupContactCount;

    /// Ref: Current group in progress

    MVPbkStoreContact* iCurrentGroup;

    };

#endif // CESMRCASPLUGINCONTACTRETRIEVER_H