/*

* 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:  MR attahcment field implementation

 *

 */

#include "cmrattachmentcommandhandler.h"

#include "cmropenattachmentcommand.h"

#include "cmrremoveattachmentcommand.h"

#include "cmrsaveattachmentcommand.h"

#include "cmrsaveandopenattachmentcommand.h"

#include "cesmrrichtextlink.h"

#include "mcalremoteattachmentinfo.h"

#include "mcalremoteattachment.h"

#include "mcalremoteattachmentoperation.h"

#include "ccalremoteattachmentinfo.h"

#include "ccalremoteattachmentapi.h"

#include "cesmrgenericfieldevent.h"

#include "cesmrfieldcommandevent.h"

#include "mesmrfieldeventqueue.h"

#include "esmrdef.h"

#include <esmrgui.rsg>

#include <calentry.h>

#include <calattachment.h>

#include <f32file.h>

#include <apgcli.h>

#include <AknGlobalNote.h>

// DEBUG

#include "emailtrace.h"

// unnamed namespace for local definitions

namespace { // codescanner::namespace

_LIT8( KUnknownDatatype, "unknown");

#if defined(_DEBUG)

// Panic literal

_LIT( KMRAttachmentCommandHandler, "MRAttachmentCommandHandler" );

/**

 * Panic codes

 */

enum TMRAttachmentCommandHandlerPanic

    {

    // Invalid command

    EMRAttachmentCommandHandlerInvalidCommand,

    // Attachment is not found

    EMRAttachmentCommandHandlerAttachmentNotFound,

    // Remote attachment information not set

    EMRAttachmentCommandHandlerRemoteInfoNotSet,

    // Remote command cannot be found

    EMRAttachmentCommandHandlerRemoteCommandNotFound,

    // Remote attachment is not found

    EMRAttachmentCommandHandlerRemoteAttachmentNotFound

    };

void Panic( TMRAttachmentCommandHandlerPanic aPanic )

    {

    User::Panic( KMRAttachmentCommandHandler, aPanic );

    }

#endif // _DEBUG

/**

 * Shows information note when one attachment is saved.

 */

void ShowInfoNoteL()

    {

    CAknGlobalNote* note = CAknGlobalNote::NewLC();

    HBufC* text =

            StringLoader::LoadLC( R_MEET_REQ_INFO_NOTE_ONE_ATTACHMENT_SAVED );

    note->ShowNoteL(

            EAknGlobalInformationNote,

            *text );

    CleanupStack::PopAndDestroy( 2, note );

    }

/**

 * Shows information note when multiple attachments have been saved.

 */

void ShowInfoNoteL( TInt aAttachmentCount )

    {

    CAknGlobalNote* note = CAknGlobalNote::NewLC();

    HBufC* text = StringLoader::LoadLC(

            R_MEET_REQ_INFO_NOTE_MULTIPLE_ATTACHMENTS_SAVED,

            aAttachmentCount );

    note->ShowNoteL(

                EAknGlobalInformationNote,

                *text );

    CleanupStack::PopAndDestroy( 2, note );

    }

} // namespace

// ======== MEMBER FUNCTIONS ========

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::CMRAttachmentCommandHandler

// ---------------------------------------------------------------------------

//

CMRAttachmentCommandHandler::CMRAttachmentCommandHandler(

        CCalEntry& aEntry,

        MESMRFieldEventQueue& aEventQueue) :

    iEntry( aEntry ),

    iEventQueue( aEventQueue )

    {

    FUNC_LOG;

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::~CMRAttachmentCommandHandler

// ---------------------------------------------------------------------------

//

CMRAttachmentCommandHandler::~CMRAttachmentCommandHandler()

    {

    FUNC_LOG;

    iDownloadOperations.ResetAndDestroy();

    delete iDocHandler;

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::NewL

// ---------------------------------------------------------------------------

//

CMRAttachmentCommandHandler* CMRAttachmentCommandHandler::NewL(

            CCalEntry& aEntry,

            MESMRFieldEventQueue& aEventQueue )

    {

    FUNC_LOG;

    CMRAttachmentCommandHandler* self =

            new (ELeave) CMRAttachmentCommandHandler( aEntry, aEventQueue );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::ConstructL

// ---------------------------------------------------------------------------

//

void CMRAttachmentCommandHandler::ConstructL()

    {

    FUNC_LOG;

    iDocHandler = CDocumentHandler::NewL();

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::HandleAttachmentCommandL

// ---------------------------------------------------------------------------

//

void CMRAttachmentCommandHandler::HandleAttachmentCommandL(

        TInt aCommandId,

        const CESMRRichTextLink& aSelectedLink )

    {

    FUNC_LOG;

    TInt attachmentIndex( ResolveAttachmentIndexL( aSelectedLink.Value() ) );

    HandleAttachmentCommandInternalL( aCommandId, attachmentIndex );

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::IsRemoteAttachmentL

// ---------------------------------------------------------------------------

//

TBool CMRAttachmentCommandHandler::IsRemoteAttachmentL(

        const CESMRRichTextLink& aSelectedLink )

    {

    FUNC_LOG;

    TInt index = ResolveAttachmentIndexL( aSelectedLink.Value() );

    CCalAttachment* attachment = iEntry.AttachmentL( index );

    TBool remoteAttachment( ETrue );

    if ( CCalAttachment::EFile == attachment->Type() )

        {

        remoteAttachment = EFalse;

        }

    return remoteAttachment;

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::SetRemoteAttachmentInformationL

// ---------------------------------------------------------------------------

//

void CMRAttachmentCommandHandler::SetRemoteAttachmentInformationL(

            CCalRemoteAttachmentApi& aRemoteAttaApi,

            CCalRemoteAttachmentInfo& aAttachmentInfo )

    {

    FUNC_LOG;

    iRemoteAttachmentApi = &aRemoteAttaApi;

    iAttachmentInfo = &aAttachmentInfo;

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::SetRemoteAttachmentInformationL

// ---------------------------------------------------------------------------

//

void CMRAttachmentCommandHandler::HandleRemoteAttachmentCommandL(

        TInt aCommandId,

        const CESMRRichTextLink& aSelectedLink )

    {

    FUNC_LOG;

    // Check that remote attachment information is being set

    __ASSERT_DEBUG(

            iRemoteAttachmentApi,

            Panic(EMRAttachmentCommandHandlerRemoteInfoNotSet) );

    __ASSERT_DEBUG(

            iAttachmentInfo,

            Panic(EMRAttachmentCommandHandlerRemoteInfoNotSet) );

    HandleRemoteAttachmentCommandInternalL(

            aCommandId,

            aSelectedLink.Value() );

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::RemoteOperations

// ---------------------------------------------------------------------------

//

RPointerArray<MCalRemoteAttachmentOperation>&

        CMRAttachmentCommandHandler::RemoteOperations()

    {

    FUNC_LOG;

    return iDownloadOperations;

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::CurrentCommandInProgress

// ---------------------------------------------------------------------------

//

TInt CMRAttachmentCommandHandler::CurrentCommandInProgress() const

    {

    FUNC_LOG;

    return iCommandInProgress;

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::Progress

// ---------------------------------------------------------------------------

//

void CMRAttachmentCommandHandler::Progress(

         MCalRemoteAttachmentOperation* aOperation,

         TInt aPercentageCompleted )

    {

    FUNC_LOG;

    TRAP_IGNORE( NotifyProgressL(

            aOperation->AttachmentInformation().AttachmentLabel(),

            aPercentageCompleted ));

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::OperationCompleted

// ---------------------------------------------------------------------------

//

void CMRAttachmentCommandHandler::OperationCompleted(

        MCalRemoteAttachmentOperation* aOperation,

        RFile& aAttachment )

    {

    FUNC_LOG;

    TRAP_IGNORE( HandleOperationCompletedL( aOperation, aAttachment ) );

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::OperationError

// ---------------------------------------------------------------------------

//

void CMRAttachmentCommandHandler::OperationError(

        MCalRemoteAttachmentOperation* /*aOperation*/,

        TInt aErrorCode )

    {

    FUNC_LOG;

    // Operation failed or cancelled, hide download indicator

    TRAP_IGNORE( HideDownloadIndicatorL() );

	iCommandInProgress = 0;

	if ( aErrorCode != KErrCancel )

        {

        // Operation failed, show error note

        CCoeEnv::Static()->HandleError( aErrorCode );

        }

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::ResolveAttachmentIndexL

// ---------------------------------------------------------------------------

//

TInt CMRAttachmentCommandHandler::ResolveAttachmentIndexL(

        const TDesC& aAttachmentLabel )

    {

    FUNC_LOG;

    TInt index( KErrNotFound );

    TInt attachmentCount( iEntry.AttachmentCountL() );

    for (TInt i(0); i < attachmentCount && KErrNotFound == index; ++i )

        {

        CCalAttachment* attachment = iEntry.AttachmentL(i);

        TPtrC attachmentLabel( attachment->Label() );

        if ( !aAttachmentLabel.Compare(attachmentLabel) )

            {

            index = i;

            }

        }

    // Check that attachment is always found

    // If attachment is not found --> Our data is corrupted

    __ASSERT_DEBUG(

            KErrNotFound != index,

            Panic( EMRAttachmentCommandHandlerAttachmentNotFound)  );

    return index;

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::ResolveAttachmentIndexL

// ---------------------------------------------------------------------------

//

TInt CMRAttachmentCommandHandler::CommandIndex(

        const TDesC& aAttachmentLabel )

    {

    FUNC_LOG;

    TInt index( KErrNotFound );

    TInt commandCount( iDownloadOperations.Count() );

    for ( TInt i(0); i < commandCount && KErrNotFound == index; ++i )

        {

        // There are download operations in progress

        const MCalRemoteAttachment& attachInfo =

                iDownloadOperations[i]->AttachmentInformation();

        TPtrC label( attachInfo.AttachmentLabel() );

        if ( !label.Compare( aAttachmentLabel ) )

            {

            index = i;

            }

        }

    return index;

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::RemoteAttachmentIndex

// ---------------------------------------------------------------------------

//

TInt CMRAttachmentCommandHandler::RemoteAttachmentIndexL(

        const TDesC& aAttachmentLabel )

    {

    FUNC_LOG;

    TInt index( KErrNotFound );

    TInt remoteAttCount( iAttachmentInfo->AttachmentCount() );

    for ( TInt i(0); i < remoteAttCount && index == KErrNotFound; ++i )

        {

        TPtrC remoteAttName( iAttachmentInfo->AttachmentL(i).AttachmentLabel() );

        if ( !remoteAttName.Compare( aAttachmentLabel ) )

            {

            index = i;

            }

        }

    return index;

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::HandleOperationCompleted

// ---------------------------------------------------------------------------

//

void CMRAttachmentCommandHandler::HandleOperationCompletedL(

        MCalRemoteAttachmentOperation* aOperation,

        RFile& aAttachment )

    {

    FUNC_LOG;

    // Notify 'download ready' event

    CESMRFieldCommandEvent* event = CESMRFieldCommandEvent::NewLC(

            NULL,

            EMRCmdHideAttachmentIndicator );

    iEventQueue.NotifyEventAsyncL( event );

    CleanupStack::Pop( event );

    // First search the correct operation from the list

    TInt operationIndex( CommandIndex(aOperation->AttachmentInformation().AttachmentLabel() ) );

    __ASSERT_DEBUG(

            operationIndex != KErrNotFound,

            Panic( EMRAttachmentCommandHandlerRemoteCommandNotFound) );

    // Resolve current download operation in progress

    MCalRemoteAttachmentOperation* operation = iDownloadOperations[ operationIndex ];

    CleanupDeletePushL( operation );

    iDownloadOperations.Remove( operationIndex );

    TInt attachmentIndex( ResolveAttachmentIndexL(

            operation->AttachmentInformation().AttachmentLabel() ) );

    if ( KErrNotFound == attachmentIndex )

        {

        User::Leave( KErrNotFound );

        }

    if ( EESMRViewerCancelAttachmentDownload != iCommandInProgress )

        {

        // Update the remote attachment to be local attachment ...

        UpdateLocalAttachmentL(

                operation->AttachmentInformation().AttachmentLabel(),

                aAttachment,

                attachmentIndex );

        }

    // Then execute normal local file attachment command

    if ( EESMRViewerOpenAttachment == iCommandInProgress ||

         EESMRViewerSaveAttachment == iCommandInProgress ||

         EESMRViewerSaveAllAttachments == iCommandInProgress )

        {

        TInt attachmentIndex(

                ResolveAttachmentIndexL(

                        operation->AttachmentInformation().AttachmentLabel() ) );

        if ( EESMRViewerOpenAttachment == iCommandInProgress )

            {

            // When opening attachment from remote storage --> Ask user to

            // save attachment first as well.

            HandleAttachmentCommandInternalL(

                    EESMRViewerOpenAndSaveAttachment, attachmentIndex );

            iCommandInProgress = 0;

            }

        else

            {

            HandleAttachmentCommandInternalL(

                    EESMRViewerSaveAttachment, attachmentIndex );

            if ( EESMRViewerSaveAllAttachments == iCommandInProgress &&

                 iAttachmentInfo->AttachmentCount() )

                {

                iCommandInProgress = 0;

                // There are more attachments to be downloaded --> Download next

                SaveNextRemoteAttachmentL();

                }

            else

                {

                if ( !iAttachmentInfo->AttachmentCount() )

                    {

                    // All remote attachments have been saved. Show info note. 

                    ShowInfoNoteL( iEntry.AttachmentCountL() );

                    }

                iCommandInProgress = 0;

                }

            }

        }

    CleanupStack::PopAndDestroy( operation );

    }

// ---------------------------------------------------------------------------

// CMRAttachmentCommandHandler::HandleAttachmentCommandInternalL

// ---------------------------------------------------------------------------

//

void CMRAttachmentCommandHandler::HandleAttachmentCommandInternalL(

            TInt aCommandId,

            TInt aAttachmentIndex )

    {

    FUNC_LOG;

    if ( iDownloadOperations.Count() )

        {

        // Cancel ongoing remote operations ...

        iDownloadOperations.ResetAndDestroy();

        }

    CMRAttachmentCommand* command = NULL;

    // Creating command

    switch ( aCommandId )

        {

        case EESMRViewerOpenAttachment:

        case EESMREditorOpenAttachment:

            {

            command = CMROpenAttachmentCommand::NewL( *iDocHandler );

            }

            break;

        case EESMREditorRemoveAttachment:

        case EESMREditorRemoveAllAttachments:

            {

            command = CMRRemoveAttachmentCommand::NewL();

            }

            break;

        case EESMRViewerSaveAttachment:

            {