/*

* Copyright (c) 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:

*

*/

#ifndef CALENATTACHMENTUI_H

#define CALENATTACHMENTUI_H

#include <e32base.h>

#include <MMGFetchVerifier.h>

#include <MAknFileSelectionObserver.h>

#include <AknWaitNoteWrapper.h>

#include <ConeResLoader.h>

#include <calencommandhandler.h>

#include <calencommands.hrh>

#include <calennotificationhandler.h>

#include "calenattachmentutils.h"

#include "calenattachmentmodel.h"

class CCalenController;

class MCalenCommandHandler;

class CCalenViewAttachmentsDialog;

class TContentProtection;

#include <AknServerApp.h>

/**

 * Handles attachment related commands

 */

class CCalenAttachmentUi : public CBase,

                           public MCalenCommandHandler,

                           public MCalenNotificationHandler,

                           public MMGFetchVerifier,

                           public MAknFileSelectionObserver,

                           public MCalenAttachmentModelObserver,

                           public MProgressDialogCallback

    {

    public:

        /**

         * First phase constructor

         * 

         * @param aController A reference to calencontroller

         * @return pointer to CCalenAttachmentUi

         */

        static CCalenAttachmentUi* NewL( CCalenController& aController );

        /**

         * Virtual destructor

         */

        virtual ~CCalenAttachmentUi();

    private:

        /**

         * C++ constructor, non-leaving

         * 

         * @param aController A reference to the calencontroller

         */

        CCalenAttachmentUi(CCalenController& aController);

        /**

         * 2nd phase constructor

         */

        void ConstructL();

        void CheckDRMStatusL(const TDesC& aFileName,TBool& aProtection);

    public:

        /**

         * From MCalenCommandHandler

         * Handles the attachement commands

         * 

         * @param aCommand Command to be handled

         * @return returns whether command is successfully handled or not

         */

        TBool HandleCommandL(const TCalenCommand& aCommand);

        /**

         * From MCalenCommandHandler.

         * Allows extending this API without breaking BC.

         * 

         * @param aExtensionUid specifies

         * @return extension of the requested type

         */

        TAny* CalenCommandHandlerExtensionL( TUid aExtensionUid );

        /** 

         * From MCalenNotificationHandler

         * Handle notifications

         * 

         * @param aNotification Nofication to be handled

         */

        void HandleNotification(const TCalenNotification aNotification );

        /**

         * From MMGFetchVerifier

         * Interface for verifying fetch file selection

         * 

         * @param aSelectedFiles Holds the list of selected files

         * @return TBool returns whether file is selected or not

         */

        TBool VerifySelectionL(const MDesCArray* aSelectedFiles);

        /**

         * From MAknFileSelectionObserver

         * Get's called when user selects an file.

         * 

         * @param aDriveAndPath Drive and full path of the file.

         * @param aEntry An entry containing all information of selected item.

         * @return Returns ETrue if it is ok to exit from dialog.

         */

        TBool OkToExitL( const TDesC& aDriveAndPath, const TEntry& aEntry );

        /**

         * From MCalenAttachmentModelObserver

         * This function that is called when attachment model adds or removes

         * attachments from its list.

         *

         * @param aCommand TCalenAttachmentCommand whether attachment is added

         *                 or removed 

         * @param attachmentIndex index of the attachment info

        */

        void NotifyChanges( TCalenAttachmentCommand aCommand ,

                          TInt aAttachmentIndex );

        /**

         * From MCalenAttachmentModelObserver

         * This function that is called when attachment model needs to

         * get access to an attachment file

         * 

         * @param aIndex index of the attachment file

         * @return returns the file handle

         */

        RFile GetAttachmentFileL(TInt aIndex);

        /**

         * From MProgressDialogCallback

         * 

         * called when dialog is dismissed

         */

        void DialogDismissedL( TInt aButtonId );

    private:

        /**

         * Used to fetch the attachment

         *

         * @param aFetchType, EImage,ENote,EAudio,EVideo

         * @return TBool returns ETrue if file is fetched successfully

         * otherwise returns EFalse

         */

        TBool FetchFileL( 

                CCalenAttachmentUtils::TCalenAttachmentFileType aFetchType);

        /**

         * Handles ECalenAddAttachment command 

         */

        void HandleAddAttachmentL();

        /**

         * Check for esisting attachments from the calentry     

         */

        void CheckForExistingAttachmentsL();

        /**

         * Copy fetched files from gallery/notes in to temporary folder

         * 

         * @param aTempPath 

         * @param aSourceFilePath

         */

        void CopyFetchedFilesL( TFileName& aTempPath, const TDesC& aSourceFilePath);

        /**

         * Add an attachment based on the file path

         * 

         * @param aSourcepath path of the file being attached

         */

        void AddAttachmentL(const TDesC& aSourceFilePath);

        /**

         * Remove the attachment from the calendar entry

         * @param aAttachmentIndex index of the attachment to be rmeoved 

         */

        void RemoveAttachmentFromEntryL(TInt aAttachmentIndex);

        /**

         * Add attachments to the calendar entry

         */

        void AddAttachmentsToEntryL();

        /** 

         * Handle notifications

         * 

         * @param aNotification Nofication to be handled

         */

        void DoHandleNotificationL(const TCalenNotification aNotification );

        /**

         * Handles ECalenViewAttachmentList command 

         */

        void DoAttachmentL();

        /**

         * Show wait note

         */

        void ShowWaitNoteL( TBool aCanCancel );

        /**

         * Compares the names of attachment being alredy added to editor, and 

         * the other one which user is trying to add now.

         */

        TBool IsDuplicateNameL(const TDesC& aSelectedFile);

        /**

         * Compares the binary data for the text files.

         */

        TBool CompareContentOfTextFilesL(const TDesC& aSelectedFile,const TDesC& aAlreadyAttachedFile);

        /**

         * Remove the temporary file after attaching the attachtment to tht entry.

         */

        void RemoveTemporaryFilesL();

    private:

        // reference to the calencontroller

        CCalenController& iController;

        CCalenAttachmentModel* iAttachmentModel;

        //own: attachment dilalog title

        HBufC* iTitle;

        //Not owned

        CCalenViewAttachmentsDialog* iAttachmentdlg;

        // Internal Flag

        TBool iAttachmentLoadingOn;

        // Own: Wait dialog

        CAknWaitDialog* iWaitDialog;

        TInt iSelectedCommand;         //command used to differntiate between the type of attachment user is trying to add. 

        TBool iAddAttachmentFromViewer;//shows attachment got added from attachment list view.

        TBool iShowToolbar;            //To update the toolbar visiblity.

        TBool iViewerActive;           //To avoid the problem of status pane change.

        TBool iSFound;                 //To check wether name is duplicated or not.

        TBool iAttachmentAlreadyExists;

        TBool iAttachmentInfoIntialized;

    };

#endif // CALENATTACHMENTUI_H