/*

* Copyright (c) 2002-2007 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: 

*

*/

#include "CPbk2EcePresenceEngine.h"

#include <CPbk2IconArray.h>

#include <TPbk2IconId.h>

#include <Pbk2IconId.hrh>

#include <Pbk2UID.h>

#include <MPbk2ContactUiControlUpdate.h>

#include <MVPbkViewContact.h>

#include <MVPbkContactLink.h>

#include <CVPbkContactManager.h>

//ECE

#include "CPbk2UIExtensionInformation.h"

#include <CPbk2UIExtensionPlugin.h>

#include <Pbk2UIExtension.hrh>

#include <TPbk2IconId.h>

#include "Pbk2NamesListExUID.h"

#include <gulicon.h>

#include <fbs.h>

#include <contactpresencefactory.h>

#include <mcontactpresence.h>

/// Unnamed namespace for local definitions

namespace {

enum TNlxPanicCodes

    {

    ENlxPanicEmptyPackage,

    ENlxPanicIconNull,

    ENlxPanicNoIconInfo,

    ENlxPanicNoIcons,

    ENlxPanicNoLinks,

    ENlxPanicStrayIcon,

    ENlxPanicStrayIconInfo

    };

_LIT(KPanicText, "CPbk2EcePresenceEngine");

void Panic(TNlxPanicCodes aReason)

    {

    _LIT( KPanicText, "CPbk2_nlx" );

    User::Panic(KPanicText,aReason);

    }

} /// namespace

const TInt KEcePresFirstIconId = 1000;

const TInt KEcePresLastIconId  = 2000;

// The maximum number of icons infos that are kept live

const TInt KEceMaxIconInfoCashe = 100;

/// The maximum number of subscriptions that are kept live.

const TInt KEceMaxSubscriptionsCached = 20;

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

// CPbk2EcePresenceEngine::NewL

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

//

CPbk2EcePresenceEngine* CPbk2EcePresenceEngine::NewL(

    CVPbkContactManager& aContactManager,

    MPbk2EcePresenceEngineObserver& aObserver,

    TSize aIconSize )

    {

    CPbk2EcePresenceEngine* self = 

        new ( ELeave ) CPbk2EcePresenceEngine( aContactManager, aObserver, aIconSize );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// CPbk2EcePresenceEngine::~CPbk2EcePresenceEngine

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

//

CPbk2EcePresenceEngine::~CPbk2EcePresenceEngine()

    {

    if ( iPresenceClient )

        {

        iPresenceClient->Close();

        }

    delete iSubscriptionMonitor;

    iSubscriptions.ResetAndDestroy();

    iIconInfoArray.ResetAndDestroy();

    }

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

// CPbk2EcePresenceEngine::CPbk2EcePresenceEngine

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

//

CPbk2EcePresenceEngine::CPbk2EcePresenceEngine

        (

    CVPbkContactManager& aContactManager,

    MPbk2EcePresenceEngineObserver& aObserver,

    TSize aIconSize )  :

    iContactManager( aContactManager ),

    iObserver( aObserver ),

    iIconSize( aIconSize )

    {

    }

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

// CPbk2EcePresenceEngine::ConstructL

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

//

void CPbk2EcePresenceEngine::ConstructL()

    {

    iPresenceClient = TContactPresenceFactory::NewContactPresenceL( iContactManager, *this );

    iNextIconId = KEcePresFirstIconId;

    iSubscriptionMonitor = CIdle::NewL(CActive::EPriorityIdle); 

    }

void CPbk2EcePresenceEngine::SubscribeContactPresenceL( const MVPbkContactLink& aLink )

    {

    CPbk2NlxPresenceSubscriptionInfo* subscriptionInfo = FindSubscription( aLink );

    if ( !subscriptionInfo )

        {

        // This contact is not observed yet.

        // Costruct our own placeholder for information about this request

        MVPbkContactLink* link = aLink.CloneLC();

        subscriptionInfo = CPbk2NlxPresenceSubscriptionInfo::NewL(

            link ); // takes ownership of link

        CleanupStack::Pop(); // link

        CleanupStack::PushL( subscriptionInfo );

        User::LeaveIfError( iSubscriptions.Append( subscriptionInfo ) );

        CleanupStack::Pop( subscriptionInfo );

        if(!iSubscriptionMonitor->IsActive())

            {

            iSubscriptionMonitor->Start(TCallBack(CPbk2EcePresenceEngine::SubscriptionMonitorL, this));

            }

        }

    CleanUpOldSubscriptionsL();

    }

TBool CPbk2EcePresenceEngine::GetIconIdForContact(

    const MVPbkContactLink& aLink,

    TPbk2IconId& aIconId )

    {

    // Do we have an icon NOW?

    CPbk2NlxPresenceSubscriptionInfo* subscriptionInfo = FindSubscription( aLink );

    TBool hasIcon = EFalse;

    if ( subscriptionInfo )

        {

        // We have subscribed for the presence of this contact.

        const CPbk2NlxPresenceIconInfo* iconInfo = subscriptionInfo->IconInfo();

        // But do we have an icon for it?

        if ( iconInfo )

            {

            if ( iconInfo->Bitmap() && iconInfo->BitmapMask() )

                {

                // We have received the icon information for this contact and the actual icons.

                TPbk2IconId iconId( TUid::Uid( KPbk2UID3 ), iconInfo->IconId()  );

                aIconId = iconId;

                hasIcon = ETrue;

                }

            }

        }

    return hasIcon;

    }

CGulIcon* CPbk2EcePresenceEngine::CreateIconCopyLC( const TPbk2IconId& aIconId )

    {

    CPbk2NlxPresenceIconInfo* iconInfo = FindIconInfo( aIconId );

    __ASSERT_DEBUG( iconInfo , Panic( ENlxPanicNoIconInfo ) );

    __ASSERT_ALWAYS( iconInfo , User::Leave( KErrGeneral ) );

    // According to the contract of GetIconIdForContact(), it returns ETrue

    // only if the actual icons exist.

    __ASSERT_DEBUG( iconInfo->Bitmap() && iconInfo->BitmapMask(),

        Panic( ENlxPanicNoIcons ) );

    __ASSERT_ALWAYS( iconInfo->Bitmap() && iconInfo->BitmapMask(),

    	User::Leave( KErrGeneral ) );

    CGulIcon* gulIcon = CGulIcon::NewL( newBitmap, newBitmapMask );

    CleanupStack::PushL( gulIcon );

    return gulIcon;

    }

void CPbk2EcePresenceEngine::ReceiveIconInfoL(

    const TDesC8& aPackedLink, const TDesC8& aBrandId, const TDesC8& aElementId )

    {

    __ASSERT_DEBUG( aPackedLink.Length() > 0, Panic( ENlxPanicEmptyPackage) );

    __ASSERT_ALWAYS( aPackedLink.Length() > 0, User::Leave( KErrGeneral ) );

    // Unpack the link array

    CVPbkContactLinkArray* linkArray =

        CVPbkContactLinkArray::NewLC( aPackedLink, iContactManager.ContactStoresL() );

    __ASSERT_DEBUG( linkArray->Count() > 0, Panic( ENlxPanicNoLinks) );

    __ASSERT_ALWAYS( linkArray->Count() > 0, User::Leave( KErrGeneral ) );

    const MVPbkContactLink& link = linkArray->At( 0 ); // There is icon info for just one contact.

    // Find the corresponding contact info

    CPbk2NlxPresenceSubscriptionInfo* subscriptionInfo = FindSubscription( link );

    __ASSERT_DEBUG( subscriptionInfo, Panic( ENlxPanicStrayIconInfo) );

    if ( subscriptionInfo )

        {

        // Check to see if we already have a placeholder object for this icon ID.

        CPbk2NlxPresenceIconInfo* iconInfo = FindIconInfo( aBrandId, aElementId );

        if ( !iconInfo )

            {

            // No placeholder exists yet. This is the first time that we heard

            // of this icon. Create an object to hold the icon and its ID information.

            // (we don't have the actual icon yet)

            iconInfo = CPbk2NlxPresenceIconInfo::NewLC( aBrandId, aElementId, iNextIconId );

            User::LeaveIfError( iIconInfoArray.Append( iconInfo ) );

            CleanupStack::Pop( iconInfo );

            ++iNextIconId;

            if ( iNextIconId > KEcePresLastIconId )

                {

                iNextIconId = KEcePresFirstIconId;

                }

            // Request the icon. It will arrive later through ReceiveIconFileL().

            iPresenceClient->GetPresenceIconFileL( aBrandId, aElementId );

            }

        // Create a mapping from subscriptionInfo to iconInfo.

        subscriptionInfo->SetIconInfo( iconInfo ); // ownership not transferred

        // Inform Phonebook UI that contact needs to be redrawn

        iObserver.ContactPresenceChanged( subscriptionInfo->ContactLink() );

        }

    else

        {

        // It was a stray contact info which we didn't request.

        }

    CleanupStack::PopAndDestroy( linkArray );

    }

void CPbk2EcePresenceEngine::ReceiveIconFileL(

    const TDesC8& aBrandId,

    const TDesC8& aElementId,

    CFbsBitmap* aBrandedBitmap,

    CFbsBitmap* aMask )

    {

   // __ASSERT_DEBUG( aBrandedBitmap && aMask, Panic( ENlxPanicIconNull) );

   // __ASSERT_ALWAYS( aBrandedBitmap && aMask, User::Leave( KErrGeneral ) );

    // Find the corresponding icon info

    CPbk2NlxPresenceIconInfo* iconInfo = FindIconInfo( aBrandId, aElementId );

    if ( iconInfo )

        {

        iconInfo->SetIcons( aBrandedBitmap, aMask ); // takes ownership

        InformObserverOfContactChanges( aBrandId, aElementId );

        }

    else

        {

        // It was a stray icon which we didn't request.

        delete aBrandedBitmap;

        delete aMask;

        }

    }

void CPbk2EcePresenceEngine::ReceiveIconInfosL(

    const TDesC8& /*aPackedLink*/,

    RPointerArray <MContactPresenceInfo>& /*aInfoArray*/,

    TInt /*aOpId*/ )

    {

    }

void CPbk2EcePresenceEngine::InformObserverOfContactChanges(

    const TDesC8& aBrandId,

    const TDesC8& aElementId )

    {

    // Tell observer that the UI needs to be refreshed

    // Loop through all subscriptions and check which ones have a matching icon.

    for ( TInt n = 0; n < iSubscriptions.Count(); ++n )

        {

        CPbk2NlxPresenceSubscriptionInfo* subscr = iSubscriptions[n];

        if ( subscr->IconInfo() )

            {

            if ( subscr->IconInfo()->BrandId().Compare( aBrandId ) == 0 &&

                subscr->IconInfo()->ElementId().Compare( aElementId ) == 0 )

                {

                // The icon matches

                // Inform Phonebook about this contact

                iObserver.ContactPresenceChanged( subscr->ContactLink() );

                }

            }

        }

    }

/**

 * Find a contact watching info object.

 * @return The object, or NULL if not found.

 */

CPbk2NlxPresenceSubscriptionInfo* CPbk2EcePresenceEngine::FindSubscription(

    const MVPbkContactLink& aContactLink )

    {

    CPbk2NlxPresenceSubscriptionInfo* info = NULL;

    TInt count = iSubscriptions.Count();

    for ( TInt n = 0; n < count && !info; ++n )

        {

        CPbk2NlxPresenceSubscriptionInfo* tmpInfo = iSubscriptions[n];

        if ( tmpInfo->ContactLink().IsSame( aContactLink ) )

            {

            // The info was found

            info = tmpInfo;

            }

        }

    return info;

    }

/**

 * Find an icon info object.

 * @return The object, or NULL if not found.

 */

CPbk2NlxPresenceIconInfo* CPbk2EcePresenceEngine::FindIconInfo(

    const TDesC8& aBrandId,

    const TDesC8& aElementId )

    {

    CPbk2NlxPresenceIconInfo* info = NULL;

    TInt count = iIconInfoArray.Count();

    for ( TInt n = 0; n < count && !info; ++n )

        {

        CPbk2NlxPresenceIconInfo* tmpInfo = iIconInfoArray[n];

        if ( tmpInfo->BrandId().Compare( aBrandId ) == 0

            && tmpInfo->ElementId().Compare( aElementId ) == 0 )

            {

            // The icon info was found

            info = tmpInfo;

            }

        }

    return info;

    }

/**

 * Find an icon info object.

 *

 * @todo The UID part of the icon ID is ignored currently.

 * @return The object, or NULL if not found.

 */

CPbk2NlxPresenceIconInfo* CPbk2EcePresenceEngine::FindIconInfo( const TPbk2IconId& aIconId )

    {

    CPbk2NlxPresenceIconInfo* info = NULL;

    TInt count = iIconInfoArray.Count();

    for ( TInt n = 0; n < count && !info; ++n )

        {

        CPbk2NlxPresenceIconInfo* tmpInfo = iIconInfoArray[n];

        // Create a temporary pbk icon id for comparison purposes

        TPbk2IconId iconId( TUid::Uid( KPbk2UID3 ), tmpInfo->IconId()  );

        if ( iconId == aIconId )

            {

            // The icon info was found

            info = tmpInfo;

            }

        }

    return info;

    }

void CPbk2EcePresenceEngine::CleanUpOldSubscriptionsL()

    {  

    // Unsubscribe the oldest excess subscriptions

    const TInt count = iSubscriptions.Count();

    // Loop through the excess subscriptions, starting from the oldest

    for ( TInt n = count - 1; n >= KEceMaxSubscriptionsCached; --n )

        {

        CPbk2NlxPresenceSubscriptionInfo* subscr = iSubscriptions[KEceMaxSubscriptionsCached-n];

        // Construct a package that contains the link.

        CDesC8ArrayFlat* desArray = new (ELeave) CDesC8ArrayFlat( 2 ); // granularity of 2

        CleanupStack::PushL( desArray );

        HBufC8* packedLink = subscr->ContactLink().PackLC();

        desArray->AppendL( *packedLink );

        CleanupStack::PopAndDestroy( packedLink );

        if(subscr->IsSubscribed())

            {

            iPresenceClient->CancelSubscribePresenceInfo( *desArray );

            }

        CleanupStack::PopAndDestroy( desArray );

        iSubscriptions.Remove( 0 );

        delete subscr;

        }

    }

void CPbk2EcePresenceEngine::CleanUpExtraIcons()

    {

    const TInt subscriptionsCount = iSubscriptions.Count();

    TInt iconCount = iIconInfoArray.Count();

    CPbk2NlxPresenceIconInfo* iconinfo = NULL;

    CPbk2NlxPresenceSubscriptionInfo* subscriptionInfo = NULL;

    for (TInt i=0; i<iconCount; i++)

        {

        TBool found = EFalse;

        iconinfo = iIconInfoArray[i];

        for (TInt j=0; j<subscriptionsCount; j++)

            {

            subscriptionInfo = iSubscriptions[j];

            if(iconinfo == subscriptionInfo->IconInfo())

                 {