/*

* 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:  MR attachment informatio fetcher definition

*

*/

#ifndef CMRATTACHMENTINFOFETCHER_H

#define CMRATTACHMENTINFOFETCHER_H

#include <e32base.h>

#include "mfsmailrequestobserver.h"

#include "mesmricalviewerobserver.h"

#include "cesmricalviewerasynccommand.h"

class CFSMailMessage;

class CFSMailClient;

class CCalEntry;

/**

 * CMRAttachmentInfoFetcher is responsible for fetching attachment

 * information and storing URI attachment information to

 * calendar entry.

 */

NONSHARABLE_CLASS( CMRAttachmentInfoFetcher ) :

        public CESMRIcalViewerAsyncCommand,

        public MFSMailRequestObserver

    {

public:

public: // Construction and destruction

    /**

     * Creates and initializes new CMRAttachmentInfoFetcher object. 

     * Ownership is transferred to caller.

     * 

     * @param aMailClient Reference to mail client

     * @param aCalSession Reference to calendar session

     * @return Pointer to CESMRImapMailFetcher object.

     */

    static CMRAttachmentInfoFetcher* NewL(

            CFSMailClient& aMailClient,

            CCalSession& aCalSession,

            CCalEntry& aCalEntry );

    /**

     * C++ destructor.

     */

    ~CMRAttachmentInfoFetcher();

private: // From MFSMailRequestObserver

    void RequestResponseL(

            TFSProgress aEvent,

            TInt aRequestId );

private: // From MESMRIcalViewerAsyncCommand

    void ExecuteAsyncCommandL();

    void CancelAsyncCommand();

private: // Implementation

    CMRAttachmentInfoFetcher(

            CFSMailClient& aMailClient,

            CCalSession& aCalSession,

            CCalEntry& aCalEntry );

    void ConstructL();

    void FetchMessageStructureL();

    TBool ConstructAttachmentInformationL();

    void HandleRequestResponseL(

            TFSProgress aEvent,

            TInt aRequestId );

    void NotifyCompletion();

private:

    /** Enumeration for object internal state */

    enum TMRAttachmentFetcherState

        {

        // Idle

        EIdle,

        // Fetching message structure

        EFetchingStructure,

        // Fetching message contents

        EFetchingContents

        };

private: // Data

    /// Own: Fetch operation request id

    TInt iStructureRequestId;

    /// Own: Fetch operation request id

    TInt iMessagePartRequestId;

    // Own: Current state

    TMRAttachmentFetcherState iState;

    /// Ref: Reference to mail client object

    CFSMailClient& iMailClient;

    /// Ref: Reference to messageobject

    CFSMailMessage* iMailMessage;

    /// Own: Operation result

    MESMRIcalViewerObserver::TIcalViewerOperationResult iResult;

    /// Ref: Reference to calendar entry

    CCalEntry& iCalEntry;

    };

#endif // CMRATTACHMENTINFOFETCHER_H

// EOF