/*

* 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 "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:  Publish & Subscribe proxy.

*

*/

// INCLUDE FILES

#include <e32base.h>     // TPriority::EPriorityHigh=20

#include <PSVariables.h>

#include <telinternalpskeys.h>

#include <telephonydomainpstypes.h>

#include <btengdomainpskeys.h>

#include <startupdomainpskeys.h>

#include <coreapplicationuisdomainpskeys.h>

#include <hwrmdomainpskeys.h>

#include <UikonInternalPSKeys.h>

#include  "phoneui.pan"

#include  "phoneconstants.h"

#include  "phonelogger.h"

#include  "cphonepubsubproxy.h"

#include  "cphonepublishsubscriberao.h"

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

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

// CPhonePubSubProxy::Instance

// Initializes the singleton object

// (other items were commented in a header).

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

//

EXPORT_C CPhonePubSubProxy* CPhonePubSubProxy::Instance()

    {

    CPhonePubSubProxy* instance = static_cast<CPhonePubSubProxy*> 

        ( CCoeEnv::Static ( KUidPubSubProxySingleton ) );

    if ( !instance )

        {

        TRAPD( err, instance = CPhonePubSubProxy::NewL() );

        if ( err )

	        {

	        Panic( EPhoneUtilsCouldNotCreateSingleton );	

	        }

        }

    return instance;

    }

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

// CPhonePubSubProxy::CancelAllNotifications

// Cancel the notification if the singleton still exists.

// (other items were commented in a header).

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

//

EXPORT_C void CPhonePubSubProxy::CancelAllNotifications( 

    MPhonePubSubObserver* aObserver )

    {

    CPhonePubSubProxy* instance = static_cast<CPhonePubSubProxy*> 

        ( CCoeEnv::Static( KUidPubSubProxySingleton ) );

    // Ignore the call since the singleton has already been destroyed and the

    // notifications removed

    if ( instance )

        {

        instance->CancelAllObserverNotifies( aObserver );

        }

    }

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

// CPhonePubSubProxy::NewL

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

//

CPhonePubSubProxy* CPhonePubSubProxy::NewL()

    {

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

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// CPhonePubSubProxy::~CPhonePubSubProxy

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

//

EXPORT_C CPhonePubSubProxy::~CPhonePubSubProxy()

    {

    if ( iPublishSubscriberArray )

        {

        iPublishSubscriberArray->ResetAndDestroy();

        }

    delete iPublishSubscriberArray;

    delete iObserverArray;

    }

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

// CPhonePubSubProxy::CPhonePubSubProxy

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

//

CPhonePubSubProxy::CPhonePubSubProxy() :

    CCoeStatic( KUidPubSubProxySingleton, EThread )

    {

    }

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

// CPhonePubSubProxy::ConstructL

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

//

void CPhonePubSubProxy::ConstructL()

    {

    iObserverArray = new ( ELeave ) CArrayFixFlat< TPubSubObserverTag >( 

        KPhonePubSubProxyObserverArrayGranularity );

    iPublishSubscriberArray = new ( ELeave ) 

        CArrayPtrFlat< CPhonePublishSubscriberAO >( 

            KPhonePubSubArrayGranularity );

    }

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

// CPhonePubSubProxy::Value

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

//

EXPORT_C TInt CPhonePubSubProxy::Value( 

    const TUid& aCategory,

    const TUint aKey )

    {

    TInt err( KErrNone );

    TInt value( 0 );

    err = RProperty::Get( aCategory, aKey, value );

    if ( err != KErrNone )

        {

        value = err;

        __PHONELOG1( 

            EBasic, 

            EPhonePhoneapp, 

            "CPhonePubSubProxy::GetValue error: %d", 

            err );

        }

    return value;

    }

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

// CPhonePubSubProxy::NotifyChangeL

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

//

EXPORT_C void CPhonePubSubProxy::NotifyChangeL( 

    const TUid& aCategory,

    const TUint aKey, 

    MPhonePubSubObserver* aObserver )

    {

    __ASSERT_DEBUG( aObserver, Panic( EPhoneUtilsParameterNotInitialized ) );

    __LOGMETHODSTARTEND(EPhoneUIUtils, "CPhonePubSubProxy::NotifyChangeL() ");

    // make sure this a new item in iObserverArray

    TBool requestIssued = EFalse;

    TBool sameRequestIssuedByObserver = EFalse;

    TInt count = iObserverArray->Count();

    // check if the request has already been issued

    for ( TInt i = 0; i < count && !requestIssued; i++ ) 

        {

        const TPubSubObserverTag& observerTag = iObserverArray->At( i );

        if ( ( observerTag.iCategory == aCategory ) &&

            ( observerTag.iKey == aKey ) )

            {

            requestIssued = ETrue;

            if ( observerTag.iObserver == aObserver )

                {

                sameRequestIssuedByObserver = ETrue;

                }

            }

        }

    // make sure the same request hasn't been issued by this observer

    if ( !sameRequestIssuedByObserver )

        {

        //add new observer to the array

        TPubSubObserverTag newObserver;

        newObserver.iCategory = aCategory;

        newObserver.iKey = aKey;

        newObserver.iObserver = aObserver;

        iObserverArray->AppendL( newObserver );

        }

    //make sure the request hasn't been issued before

    if ( !requestIssued )

        {

        //issue a new request

        CPhonePublishSubscriberAO* publishSubscriber = 

            CPhonePublishSubscriberAO::NewL( this, aCategory, aKey );

        CleanupStack::PushL( publishSubscriber );

        iPublishSubscriberArray->AppendL( publishSubscriber );

        CleanupStack::Pop( publishSubscriber );

        //subscribe for property change notications

        publishSubscriber->Subscribe();

        }

    }

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

// CPhonePubSubProxy::ChangePropertyValue

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

//

EXPORT_C void CPhonePubSubProxy::ChangePropertyValue( 

    const TUid& aCategory,

    const TUint aKey, 

    const TInt aValue )

    {

    TInt err( KErrNone );

    err = RProperty::Set( aCategory, aKey, aValue );

    if ( err != KErrNone )

        {

        __PHONELOG1( 

            EBasic, 

            EPhonePhoneapp, 

            "CPhonePubSubProxy::ChangePropertyValue error: %d", 

            err );

        }

    }

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

// CPhonePubSubProxy::HandlePropertyChangedL

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

//

void CPhonePubSubProxy::HandlePropertyChangedL( 

    const TUid& aCategory, 

    const TUint aKey,

    const TInt aValue )

    {

    TInt count = iObserverArray->Count();

    for ( TInt i = 0; i < count; )

        {

        // Take observer information.

        TPubSubObserverTag observerTag = iObserverArray->At( i );

        if ( ( observerTag.iCategory == aCategory ) && 

            ( observerTag.iKey == aKey ) ) 

            {

            observerTag.iObserver->HandlePropertyChangedL( 

                aCategory, aKey, aValue );

            }

        // Update count variable - might have been modified by the

        // HandlePropertyChangedL call.

        count = iObserverArray->Count();

        // If still in bounds, check if nothing changed. If so, then

        // we can move to next observer.

        if ( i < count )

            {

            const TPubSubObserverTag& obs = iObserverArray->At( i );

            if ( ( obs.iObserver == observerTag.iObserver ) &&

                 ( obs.iCategory == observerTag.iCategory ) &&

                 ( obs.iKey == observerTag.iKey ) )

                {

                i++;

                }

            }

        }

    }

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

// CPhonePubSubProxy::CancelAllObserverNotifies

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

//

void CPhonePubSubProxy::CancelAllObserverNotifies( 

    MPhonePubSubObserver* aObserver )

    {

    TInt count = iObserverArray->Count();

    // Remove the observer and its subscriptions

    TBool observerRemoved = EFalse;

    for( TInt i = count - 1; i >= 0 && !observerRemoved; i-- ) 

        {

        const TPubSubObserverTag& observerTag = iObserverArray->At( i );

        if ( observerTag.iObserver == aObserver )

            {

            // Remove observer 

            observerRemoved = ETrue;

            iObserverArray->Delete( i );

            }

        }

    }

//  End of File