/*

* Copyright (c) 2008-2009 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:    Media List Command Handler

*

*/

#include <e32base.h>

#include "glxmpxcommandcommandhandler.h"

#include <AknProgressDialog.h> 

#include <bautils.h>

#include <data_caging_path_literals.hrh>

#include <eikprogi.h>

#include <mpxmediageneraldefs.h>

#include <mpxmessagegeneraldefs.h>

#include <mpxmessageprogressdefs.h>

#include <mpxcommandgeneraldefs.h>

#include <StringLoader.h>

#include <glxgeneraluiutilities.h>

#include <mglxmedialist.h>

#include <glxfetchcontextremover.h>

#include <glxmedialistiterator.h>

#include <glxattributecontext.h>

#include <glxattributeretriever.h>

#include <glxuistd.h>

#include <glxuiutilities.rsg>

#include <glxcommandhandlers.hrh>

#include <glxresourceutilities.h>                // for CGlxResourceUtilities

/// @todo Move elsewhere

const TInt KGlxMaxNoteLength = 256;

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

// ConstructL

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

//	

EXPORT_C CGlxMpxCommandCommandHandler::

    CGlxMpxCommandCommandHandler(MGlxMediaListProvider* aMediaListProvider, TBool aHasToolbarItem)

        : CGlxMediaListCommandHandler(aMediaListProvider, aHasToolbarItem)

	{

    iAppUi = static_cast< CAknAppUi* >( CCoeEnv::Static()->AppUi() );

	}

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

// Destructor

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

//	

EXPORT_C CGlxMpxCommandCommandHandler::~CGlxMpxCommandCommandHandler()

	{

	// cancel command if running

	if (iProgressComplete)

	    {

//    	MediaList().Cancel();

	    }

    delete iProgressDialog;

    if ( iResourceOffset )

        {

        CCoeEnv::Static()->DeleteResourceFile(iResourceOffset);

        }

	}

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

// DoExecuteL

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

//	

EXPORT_C TBool CGlxMpxCommandCommandHandler::DoExecuteL(TInt aCommandId, 

        MGlxMediaList& aList)

    {

    // reset progress complete flag

    iProgressComplete = EFalse;

    // deriving class consumes command by default

    TBool consume = ETrue;

	TInt selectionCount = aList.SelectionCount();

	const TGlxMedia& focusedMedia = aList.Item(aList.FocusIndex());

    // show confirmation note

    consume = ConfirmationNoteL(aCommandId, aList);

    // Check if the selected / focused file(s)s have been deleted from

	// another application while the confirmation note is displayed

    if (((selectionCount > 0) && (aList.SelectionCount() == 0)) ||

        ((selectionCount == 0) &&

        (focusedMedia.Id() != aList.Item(aList.FocusIndex()).Id())))

		{

		// All the selected / focused item(s) have been deleted,

		// do not allow the command to execute.

		consume = EFalse;

		}

    if ( consume )

        {

        // get a command object from the deriving class.

        // Allow deriving class modify the consume value, even without 

        // creating a commmand (in case it wants to filter out a command)

        CMPXCommand* command = CreateCommandL(aCommandId, aList, consume);

        if (command)

            {

            CleanupStack::PushL(command);

            if ( CommandInfo(aCommandId).iStopAnimationForExecution )

                {

                // Stop GIF animation

                iAppUi->ProcessCommandL(EGlxCmdDisableAnimations);

                iAnimationStopped = ETrue;

                }

            // Add the pointer of this command handler as session id into the message

            // This can be used to ensure that this object is the intended recipient

            // of a message

            command->SetTObjectValueL<TAny*>(KMPXCommandGeneralSessionId,

            		static_cast<TAny*>(this));

       		aList.AddMediaListObserverL(this);

            aList.CommandL(*command);

            // raise progress note. Note will be closed when complete message received

            ProgressNoteL(aCommandId);

            CleanupStack::PopAndDestroy(command);

            }

        }

    return consume;

    }

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

// TryExitL

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

//	

EXPORT_C void CGlxMpxCommandCommandHandler::TryExitL(TInt aErrorCode)

	{

	// any error will abort the command execution

    if ( KErrNone != aErrorCode ) 

	    {

	    // error received. Close progress note

		DismissProgressNoteL();

	    // Remove medialist observer

	    RemoveMediaListObserver();

		// handle error

		HandleErrorL(aErrorCode);

	    }

	else if (iProgressComplete)

        {

    	// ask deriving class if it is ready to exit (i.e., to close progress note). 

    	// (It may be waiting for another message, etc.)

    	if (OkToExit()) 

    	    {

    	    // close progress note

    		DismissProgressNoteL();

    	    // Remove medialist observer

    	    RemoveMediaListObserver();

    		// show completion note

    		CompletionNoteL();

    	    }

        }

	}	

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

// Default implementation shows an error note

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

//	

EXPORT_C void CGlxMpxCommandCommandHandler::HandleErrorL(TInt aErrorCode) 

    {

	// show error note

	GlxGeneralUiUtilities::ShowErrorNoteL(aErrorCode);

    }

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

// Update progress 

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

//	

TBool CGlxMpxCommandCommandHandler::UpdateProgressL(const CMPXMessage& aMessage,

        TInt& aError)

    {

    TBool isComplete = EFalse;

    // should not receive any progress messages after progress is completed

    __ASSERT_DEBUG(!iProgressComplete, Panic(EGlxPanicIllegalState));

    ///    @todo remove progress update error handling

    TMPXAttribute currentCountAttr(KMPXMessageContentIdProgress, EMPXMessageProgressCurrentCount);

    TMPXAttribute totalCountAttr(KMPXMessageContentIdProgress, EMPXMessageProgressTotalCount);

    if ( ( KErrNone == aError ) && (aMessage.IsSupported(currentCountAttr))

    	&& (aMessage.IsSupported(totalCountAttr) ) )

        {

        // get current and total count from the message

	    TInt currentValue = aMessage.ValueTObjectL<TInt>(currentCountAttr);	

	    TInt total= aMessage.ValueTObjectL<TInt>(totalCountAttr);	

        // update progress bar if not complete yet, otherwise remember completion

		if ( currentValue < total )

			{

			// Progress info construction may have failed, but command was issued before

			if (iProgressInfo)

			    {

    			iProgressInfo->SetFinalValue(total);

    			iProgressInfo->SetAndDraw(currentValue);

			    }

            }

		else

			{

			isComplete = ETrue;

            if ( iAnimationStopped )

                {

                // Restart animation

                iAppUi->ProcessCommandL(EGlxCmdEnableAnimations);

                iAnimationStopped = EFalse;

                }

			}

		}

	return isComplete;    

    }

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

// Default implementation of advanced command handling does nothing

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

//	

EXPORT_C void CGlxMpxCommandCommandHandler::DoHandleCommandCompleteL(TAny* /*aSessionId*/, 

        CMPXCommand* /*aCommandResult*/, TInt /*aError*/, MGlxMediaList* /*aList*/)

    {

    }

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

// Default implementation of advanced message handling does nothing

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

//	

EXPORT_C TInt CGlxMpxCommandCommandHandler::DoHandleMessageL(const CMPXMessage& /*aMessage*/,

	    MGlxMediaList& /*aList*/)

    {

    return KErrNone;

    }

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

// Default implementation DoHandleItemAddedL does not do anything

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

//	

EXPORT_C void CGlxMpxCommandCommandHandler::DoHandleItemAddedL(TInt /*aStartIndex*/, 

		TInt /*aEndIndex*/, MGlxMediaList* /*aList*/)

	{

	}

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

// Default implementation is always ready to exit

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

//	

EXPORT_C TBool CGlxMpxCommandCommandHandler::OkToExit() const

    {

    return ETrue;

    }

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

// Show confirmation note

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

//	

EXPORT_C TBool CGlxMpxCommandCommandHandler::ConfirmationNoteL(TInt aCommandId,

        MGlxMediaList& aMediaList) const

	{

	TInt selectionCount = aMediaList.SelectionCount();

    // If media list is not empty, treat focused item as selected

    // At this point can assume that the command was disabled 

    // if static items were not supported	

	if ( selectionCount == 0 && aMediaList.Count() > 0 )

		{

		selectionCount = 1;

		}

    // Show confirmation note

	TBool confirmed = EFalse;

	if ( selectionCount == 1 )

	    {

		confirmed = ConfirmationNoteSingleL(aCommandId, aMediaList);

	    }

	else

	    {

		confirmed = ConfirmationNoteMultipleL(aCommandId, aMediaList);

	    }

	return confirmed;

	}

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

// So confirmation note if a single item is selected

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

//	

EXPORT_C TBool CGlxMpxCommandCommandHandler::ConfirmationNoteSingleL(TInt aCommandId, 

        MGlxMediaList& aMediaList) const

    {

    // if no confirmation note shown, assume command is confirmed

    TBool confirmed = ETrue;

    // get confirmation note text for single selection

    HBufC* noteText = ConfirmationTextL(aCommandId, EFalse); // EFalse for single selection

    if ( noteText )

    {

        CleanupStack::PushL(noteText);

        // Retrieve title string for selected item from the collection plugin

        // create fetch context

        TGlxSelectionIterator iterator;

        iterator.SetRange(1);

        CGlxAttributeContext* attributeContext = new(ELeave) CGlxAttributeContext(&iterator);

        CleanupStack::PushL(attributeContext);

        attributeContext->AddAttributeL(KMPXMediaGeneralTitle);

        // add context to media list

        aMediaList.AddContextL(attributeContext, KGlxFetchContextPriorityLow);

        // TGlxContextRemover will remove the context when it goes out of scope

        // Used here to avoid a trap and still have safe cleanup

        TGlxFetchContextRemover contextRemover(attributeContext, aMediaList);

        // put to cleanupstack as cleanupstack is emptied before stack objects

        // are deleted

        CleanupClosePushL( contextRemover);

        // retrieve title attribute

        TInt err = GlxAttributeRetriever::RetrieveL(*attributeContext, aMediaList, EFalse);

        // context off the list

        CleanupStack::PopAndDestroy( &contextRemover );

        if ( err == KErrNone )

            {

            // use iterator to get the index of the right item 

            iterator.SetToFirst(&aMediaList);

            const CGlxMedia* media = aMediaList.Item(iterator++).Properties();

            // noteText has a place for a title string in it

            const TDesC& itemName = media->ValueText(KMPXMediaGeneralTitle);

            TBuf<KGlxMaxNoteLength> text;

            StringLoader::Format(text, *noteText, -1, itemName);

            // show popup

            confirmed = GlxGeneralUiUtilities::ConfirmQueryL(R_GLX_QUERY_YES_NO, text);

            }

            // (else) If error, assume confirmed anyway

            CleanupStack::PopAndDestroy(attributeContext);

            CleanupStack::PopAndDestroy(noteText);

     }

	 return confirmed;

	 }

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

// Confirmation note if multiple items are selected

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

//	

EXPORT_C TBool CGlxMpxCommandCommandHandler::ConfirmationNoteMultipleL(TInt aCommandId, 

        MGlxMediaList& aMediaList) const

	{

	// if no confirmation note shown, assume command is confirmed

	TBool confirmed = ETrue;

	// get confirmation note text for multiselection

	HBufC* noteText = ConfirmationTextL(aCommandId, ETrue); // ETrue for Multiselection

	if ( noteText )

		{

		CleanupStack::PushL(noteText);

        // string has a place for number in it, and that number should be populated with selected

        // item count

		TInt count = aMediaList.SelectionCount();

        TBuf<KGlxMaxNoteLength> text;

		GlxGeneralUiUtilities::FormatString(text, *noteText, -1, count, ETrue);

        // show popup

		confirmed = GlxGeneralUiUtilities::ConfirmQueryL(R_GLX_QUERY_YES_NO, text);

        CleanupStack::PopAndDestroy(noteText);

		}

	return confirmed;

	}

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

// Default implementation returns null, and no confirmation note will be shown

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

//	

EXPORT_C HBufC* CGlxMpxCommandCommandHandler::ConfirmationTextL(TInt /*aCommandId*/, 

        TBool /*aMultiSelection*/) const

    {

    return NULL;

    }       

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

// Return default progress string

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

//	

EXPORT_C HBufC* CGlxMpxCommandCommandHandler::ProgressTextL(TInt /*aCommandId*/) const

    {

    // Lazy construction for resource file

    if (iResourceOffset == 0)

        {

        // Load resource file

    	TParse parse;

        parse.Set(KGlxUiUtilitiesResource, &KDC_APP_RESOURCE_DIR, NULL);

        TFileName resourceFile;

        resourceFile.Append(parse.FullName());

        CGlxResourceUtilities::GetResourceFilenameL(resourceFile);  

        // Store resource offset as member variable, so don't have to trap the

        // leaving calls here

       	iResourceOffset = CCoeEnv::Static()->AddResourceFileL(resourceFile);

        }

    // get progress note string

    return StringLoader::LoadL( R_GLX_PROGRESS_GENERAL );

    }

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

// Default implementation returns null, and no completion note will be shown

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

//	

EXPORT_C HBufC* CGlxMpxCommandCommandHandler::CompletionTextL() const

    {

    return NULL;

    }

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

// ProgressNoteL

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

//	

void CGlxMpxCommandCommandHandler::ProgressNoteL(TInt aCommandId)

	{

	//MGlxMediaList& mediaList = MediaList();

    // get progress note 

    HBufC* progressText = ProgressTextL(aCommandId);

    __ASSERT_DEBUG(progressText, Panic(EGlxPanicNullDescriptor));

	CleanupStack::PushL(progressText);

    // construct progress dialog

	iProgressDialog = new(ELeave)CAknProgressDialog(

			(REINTERPRET_CAST(CEikDialog**,&iProgressDialog)));

	iProgressDialog->PrepareLC(R_GLX_PROGRESS_NOTE); 

	iProgressDialog->SetTextL(*progressText);

	iProgressDialog->SetCallback(this);

    // pick up progress info so that progress notification can be later updated

	iProgressInfo = iProgressDialog->GetProgressInfoL();

    // launch the note

	iProgressDialog->RunLD();

	CleanupStack::PopAndDestroy(progressText); 

	}

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

// DismissProgressNoteL

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

//	

void CGlxMpxCommandCommandHandler::DismissProgressNoteL()

	{

    // Close the progress note, if displayed

    if (iProgressDialog) 

        {

    	iProgressDialog->ProcessFinishedL();

    	iProgressDialog = NULL;

    	iProgressInfo = NULL;

        }

	}

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

// Remove MediaList Observer

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

//

void CGlxMpxCommandCommandHandler::RemoveMediaListObserver()

	{

	MGlxMediaList& mediaList = MediaList();

	mediaList.RemoveMediaListObserver(this);

	}

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

// Show a completion note

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

//	

void CGlxMpxCommandCommandHandler::CompletionNoteL() const

	{

	// Get completion note text