/*

* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:  A task to update all Feeds.

*

*/

#include "FeedsDatabase.h"

#include "FeedsServer.h"

#include "Logger.h"

#include "PackedFeed.h"

#include "PackedFolder.h"

#include "UpdateAllFeedsTask.h"

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

// CUpdateAllFeedsTask::NewL

//

// Two-phased constructor.

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

//

CUpdateAllFeedsTask* CUpdateAllFeedsTask::NewL(CFeedsServer& aFeedsServer,

        TInt aFolderListId, MUpdateAllFeedsTaskObserver& aObserver)

    {

    CUpdateAllFeedsTask* self = new (ELeave) CUpdateAllFeedsTask(aFeedsServer, 

            aFolderListId, aObserver, EFalse);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop();

    return self;

    }

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

// CUpdateAllFeedsTask::NewL

//

// Two-phased constructor.

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

//

CUpdateAllFeedsTask* CUpdateAllFeedsTask::NewL(CFeedsServer& aFeedsServer,

        TInt aFolderListId, const RArray<TInt>& aFeedIds, MUpdateAllFeedsTaskObserver& aObserver)

    {

    CUpdateAllFeedsTask* self = new (ELeave) CUpdateAllFeedsTask(aFeedsServer, 

            aFolderListId, aObserver, ETrue);

    CleanupStack::PushL(self);

    self->ConstructL();

    for (TInt i = 0; i < aFeedIds.Count(); i++)

        {

        // Add it to the list of entries to update (duplicate ids are ignored).

        (void) self->iFeedIds.InsertInOrder(aFeedIds[i]);

        }

    CleanupStack::Pop();

    return self;

    }

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

// CUpdateAllFeedsTask::CUpdateAllFeedsTask

// C++ default constructor can NOT contain any code, that

// might leave.

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

//

CUpdateAllFeedsTask::CUpdateAllFeedsTask(CFeedsServer& aFeedsServer,

        TInt aFolderListId, MUpdateAllFeedsTaskObserver& aObserver, TBool aSelected):

        CTask(aFeedsServer), iLeakTracker(CLeakTracker::EUpdateAllFeedsTask), 

        iObserver(aObserver), iFolderListId(aFolderListId), iSelected(aSelected)

    {

    }

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

// CUpdateAllFeedsTask::ConstructL

// Symbian 2nd phase constructor can leave.

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

//

void CUpdateAllFeedsTask::ConstructL()

    {

    BaseConstructL(ETrue);

    iCheckDiskSpace = CCheckDiskSpace::NewL(this);

    iCheckDiskSpace->StartListening();

    }        

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

// CUpdateAllFeedsTask::~CUpdateAllFeedsTask

// Deconstructor.

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

//

CUpdateAllFeedsTask::~CUpdateAllFeedsTask()

    {

    iFeedIds.Close();

    delete iUpdateFeedTask;

    delete iCheckDiskSpace;

    iCheckDiskSpace = NULL;

    }

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

// CUpdateAllFeedsTask::StartTaskL.

//

// Starts the task.

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

//

void CUpdateAllFeedsTask::StartTaskL()

    {

    TInt drive( EDriveC );

    TBool isSpace( EFalse );

    RFs                 rfs;

    User::LeaveIfError(rfs.Connect());

    CleanupClosePushL(rfs);

    TRAP_IGNORE( isSpace = !SysUtil::DiskSpaceBelowCriticalLevelL(

                                                &rfs,

                                                KMinFreebytes,

                                                drive ));

    CleanupStack::PopAndDestroy();  //rfs

    // Abort the updation of feeds under low memory.

    if(!isSpace)

        {

        iObserver.UpdateAllFeedsCompleted(KErrNoMemory);

        return;

        }

    // Extract all of the ids if not selected update.

    if ( !iSelected )

        {

        if( iFeedIds.Count() != 0 )

            {

            FEED_LOG1(_L("Feeds"), _L("Feeds_Errors.log"), 

                EFileLoggingModeAppend, _L("CUpdateAllFeedsTask::StartTaskL iFeedIds count is %d when updating all"), 

                iFeedIds.Count());

            }

        iFeedsServer.Database().AllFeedIdsL( iFeedIds, iFolderListId );

        }

    // Otherwise just use the feed ids already in iFeedIds.

    // Start the first update.

    UpdateNextFeedL();

    }

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

// CUpdateAllFeedsTask::StartWait

//

// Notifies the observer that the UrlHandler is about to start a lengthy operation.

// In response the observer could display somekind of status indicator.

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

//

void CUpdateAllFeedsTask::StartWait()

    {

    //iObserver.StartWait();

    }

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

// CUpdateAllFeedsTask::Completed

//

// Called upon completion of the task.

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

//

void CUpdateAllFeedsTask::Completed(CPackedFeed* aPackedFeed, const TDesC& aFeedUrl,TInt aFeedId, 

        TInt aStatusCode)

    {

    TInt err;

    // Delete the task.

    iUpdateFeedTask->AutoDelete();

    iUpdateFeedTask = NULL;

    // A new packed feed is ready update the database.

    if (aPackedFeed != NULL)

        {

        // Update the database.

        TRAP_IGNORE(iFeedsServer.Database().UpdateFeedL(*aPackedFeed, aFeedUrl,aFeedId, iFolderListId));

        iFeedIds.Remove(iNextFeedIndex);

        delete aPackedFeed;

        }

    else

        {

        iFeedIds.Remove(iNextFeedIndex);

        }

    if(aStatusCode != KErrCancel && aStatusCode != KErrNoMemory)

    	{

        // Update the database.

        TRAP_IGNORE(iFeedsServer.Database().UpdateFeedStatusL(aFeedId,aStatusCode));

    	}

    // Stop updating if a fatal error ocurrs.

    // TODO: What other errors should stop this?

    if ((aStatusCode == KErrCancel) || (aStatusCode == KErrNoMemory))

        {

        iObserver.UpdateAllFeedsCompleted(aStatusCode);

        }

    // Otherwise start the next update.  Note: this is done even if the last 

    // update failed.

    else

        {        

        TRAP(err, UpdateNextFeedL());

        // Just stop updating if an error occurred.

        if (err != KErrNone)

            {

            iObserver.UpdateAllFeedsCompleted(err);

            }

        }

    }

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

// CUpdateAllFeedsTask::UpdateNextFeed

//

// Starts the update of the next feed.

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

//

void CUpdateAllFeedsTask::UpdateNextFeedL()

    {

    TBool  done = EFalse;

    // TODO: Allow several feeds to be updated at the same time.

    while (!done)

        {        

        // Update the next feed.

        if (iNextFeedIndex < iFeedIds.Count())

            {

            HBufC*  feedUrl = NULL;

            if(iFeedIds[iNextFeedIndex] > 0)

                {

                // Get feed's url from the datbase.

                (void) iFeedsServer.Database().UrlFromFeedIdL(

                        iFeedIds[iNextFeedIndex], feedUrl);

                CleanupStack::PushL(feedUrl);

                // Create a new task to update the feed.

                iUpdateFeedTask = CUpdateFeedTask::NewL(iFeedsServer, 

                        *feedUrl,iFeedIds[iNextFeedIndex], *this);        

                TRAPD(err, iUpdateFeedTask->StartTaskL());

                // Done if the task was started.

                if (err == KErrNone)

                    {

                    done = ETrue;

                    }

                // Otherwise the task wasn't started so delete it.

                else

                    {

                    if(err != KErrCancel && err != KErrNoMemory)

    	                {

    		            iFeedsServer.Database().UpdateFeedStatusL(iFeedIds[iNextFeedIndex],err);

            	        }

                    delete iUpdateFeedTask;

                    iUpdateFeedTask = NULL;

                    }

                CleanupStack::PopAndDestroy(feedUrl);

                }

            }

        // Otherwise notify the observer that there are no more feeds to update.

        else

            {

#if defined(_DEBUG)

            iFeedsServer.Database().DebugPrintItemTableL();

#endif

            iObserver.UpdateAllFeedsCompleted(KErrNone);

            done = ETrue;

            }

        }

    }

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

// CUpdateAllFeedsTask::AddFeedL

//

// return integer

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

//

TInt CUpdateAllFeedsTask::AddFeedL( RArray<TInt> aFeedIds)

    {

    TBool taskRunning = EFalse;

    if(iFeedIds.Count())

        {

        taskRunning = ETrue;    

        }   

    for(TInt i=0 ; i< aFeedIds.Count(); i++)

        {

        if( iFeedIds.Find(aFeedIds[i]) < 0 )

            {

            iFeedIds.Append(aFeedIds[i]);

            }

        }

    if(!taskRunning)

        {

        iNextFeedIndex = 0;

        UpdateNextFeedL();

        }

    return KErrNone;

    }

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

// CUpdateAllFeedsTask::HttpConnection

//

// return connection

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

//

CHttpConnection& CUpdateAllFeedsTask::HttpConnection()

    {

    return iObserver.HttpConnection();

    }

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

// CUpdateAllFeedsTask::UpdateAllFeedsCompleted

//

// return connection

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

//

void CUpdateAllFeedsTask::UpdateAllFeedsCompleted(TInt aStatusCode)

    {

    iObserver.UpdateAllFeedsCompleted(aStatusCode);

    }

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

// CCheckDiskSpace::NewL

//

// Two-phased constructor.

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

CCheckDiskSpace* CCheckDiskSpace::NewL(CUpdateAllFeedsTask* aUpdateAllFeedsTask)

    {

    CCheckDiskSpace* self = new (ELeave) CCheckDiskSpace();

    CleanupStack::PushL(self);

    self->ConstructL(aUpdateAllFeedsTask);

    CleanupStack::Pop();

    return self;

    }

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

// CCheckDiskSpace::~CCheckDiskSpace

//

// Destructor

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

CCheckDiskSpace::~CCheckDiskSpace()

    {

    if(iIsListening)

        {

        Cancel();

        iIsListening = EFalse;

        }

    iRfs.Close();

    }

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

// CCheckDiskSpace::ConstructL

//

// Symbian 2nd phase constructor can leave.

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

void CCheckDiskSpace::ConstructL(CUpdateAllFeedsTask* aUpdateAllFeedsTask)

    {

    CActiveScheduler::Add(this);

    iUpdateAllFeedsTask = aUpdateAllFeedsTask;  

    User::LeaveIfError(iRfs.Connect());

    }

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

// CCheckDiskSpace::CCheckDiskSpace

//

//C++ default constructor can NOT contain any code that

// might leave.

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

CCheckDiskSpace::CCheckDiskSpace():CActive(EPriorityStandard ), iIsListening(EFalse)

    {

    }

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

// CCheckDiskSpace::RunL

//

// To Receive event from Subscribe and publish server and

// based on the C: drive memory. 

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

void CCheckDiskSpace::RunL()

    {

    if(iStatus == KErrNone)

        {

        TInt drive( EDriveC );

        TBool isSpace( EFalse );

        TRAP_IGNORE( isSpace = !SysUtil::DiskSpaceBelowCriticalLevelL(

                                                    &iRfs,

                                                   KMinFreebytes,

                                                   drive ));

        if(!isSpace)

            {

            iUpdateAllFeedsTask->UpdateAllFeedsCompleted(KErrNoMemory);

            }

        else

            {

            StartListening();

            }    

        }

    else

        {

        iIsListening = EFalse;

        }

    }

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

// CCheckDiskSpace::RunError

// 

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

void CCheckDiskSpace::RunError()

    {

    }

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

// CCheckDiskSpace::DoCancel

// 

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

void CCheckDiskSpace::DoCancel()

    {

    iRfs.NotifyDiskSpaceCancel(iStatus);

    }

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

// CCheckDiskSpace::StartListening

//

// This function subscribe to receive events on C: drive memory activites.

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

void CCheckDiskSpace::StartListening()

    {

    if(!IsActive())

        {

        TInt drive( EDriveC );

        iRfs.NotifyDiskSpace( KMinFreebytes, drive, iStatus);

        iIsListening = ETrue;

        SetActive();

        }

    }