/*

* 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:  Proxy for the connection to central repository.

*

*/

#ifndef __CPHONECENREPPROXY_H

#define __CPHONECENREPPROXY_H

//  INCLUDES

#include <coemain.h>

#include <e32base.h>

#include <centralrepository.h>

#include <cenrepnotifyhandler.h>

// CONSTANTS

class MPhoneCenRepObserver;

class CPhoneCenRepEventHandler;

// FORWARD DECLARATIONS

class TPhoneCmdParamAppInfo;

/**

*  CPhoneCenRepProxy is an API used as proxy for phone application to get/set

*  and observe central repository settings.

*

*  How to get some setting?

*  ---------------------------

*  example code:

*  TBuf<100> value;

*  CPhoneCenRepProxy::Instance()->GetString( uid, key, value ); 

*  

*  uid and key should be retrieved from <Module Name>InternalCRKeys.h

*  

*  How to set any settings

*  --------------------------------------

*  example code:

*  TInt value = 10;

*  CPhoneCenRepProxy::Instance()->SetInt( uid, key, value );

*

*  How to observe any settings

*  --------------------------------------

*  example code:

* 

*  class CPhoneSomeManager : private MPhoneCenRepObserver

*      {

*      ...

*      virtual void HandleCenRepChangeL( 

*          const TUid& aUid, 

*          const TUint aId );

*      ....

*      }

*

*  CPhoneSomeManager::SomeFunctionL

*      {

*      CPhoneCenRepProxy::Instance()->NotifyChangeL( uid1, id1, this );

*

*      CPhoneCenRepProxy::Instance()->NotifyChangeL( uid2, id2, this );

*      }

*  

*  CPhoneSomeManager::HandleCenRepChangeL( 

*      const TUid& aUid,

*      const TUint aId )

*      {

*      switch( aId )

*          {

*          case ESetting1:

*              .... //do something

*          case ESetting2:

*              .... //do something

*          default:

*              .... //panic in debug

*          }

*      }

*

*  //The CancelAllNotifies() should be always called before destroy the object

*  CPhoneSomeManager::~CPhoneSomeManager()

*      {

*      CPhoneCenRepProxy::Instance()->CancelAllNotifies( this );

*      }

*

*/

// CLASS DECLARATION

class CPhoneCenRepProxy : 

    public CCoeStatic 

    {

    public:  // Constructors and destructor

        /**

        * First call initializes the singleton object. Subsequent calls return

        * created instance.

        * @return the created instance.

        */

        IMPORT_C static CPhoneCenRepProxy* Instance();

        /**

        * Destructor.

        */

        IMPORT_C virtual ~CPhoneCenRepProxy();

    public: // New Functions

        /**

        * Cancel all requests by the observer. This function should always be 

        * call before an object is destroyed. During shutdown, this singleton

        * may be deleted before the classes that observe it. If this happens, the

        * routine will just return since of requests have already been cancelled.

        * @param aObserver

        */

        IMPORT_C static void CancelAllNotifies( 

            MPhoneCenRepObserver* aObserver );

        /**

        * Set integer value of setting

        * @param aUid identifing the central repository UID.

        * @param aId central repository ID.

        * @param aValue the value associated with the central repository ID

        */

        IMPORT_C TInt SetInt( 

            const TUid& aUid, 

            const TUint aId,

            const TInt aValue );

        /**

        * Set string value of setting

        * @param aUid identifing the central repository UID.

        * @param aId central repository ID.

        * @param aValue the value associated with the central repository ID

        * @return refer to SharedDataClient.h for detail explanation

        */

        IMPORT_C TInt SetString( 

            const TUid& aUid, 

            const TUint aId,

            const TDesC& aValue );

        /**

        * Set real value of setting

        * @param aUid identifing the central repository UID.

        * @param aId central repository ID.

        * @param aValue the value associated with the central repository ID

        */

        IMPORT_C TInt SetReal( 

            const TUid& aUid, 

            const TUint aId,

            const TReal aValue );

        /**

        * Get integer value of setting

        * @param aUid identifing the central repository UID.

        * @param aId central repository ID.

        * @param aValue the value associated with the central repository ID

        */

        IMPORT_C TInt GetInt( 

            const TUid& aUid, 

            const TUint aId, 

            TInt& aValue ) const;

        /**

        * Get string value of setting

        * @param aUid identifing the central repository UID.

        * @param aId central repository ID.

        * @param aValue the value associated with the central repository ID

        */

        IMPORT_C TInt GetString( 

            const TUid& aUid, 

            const TUint aId, 

            TDes& aValue ) const;

        /**

        * Get real value of setting

        * @param aUid identifing the central repository UID.

        * @param aId central repository ID.

        * @param aValue the value associated with the central repository ID

        */

        IMPORT_C TInt GetReal( 

            const TUid& aUid, 

            const TUint aId, 

            TReal& aValue ) const;

        /**

        * Notify the change of the setting

        * @param aUid identifing the central repository UID.

        * @param aId central repository ID.

        * @param aObserver The pointer to the observer to handle the change 

        *     notification

        */

        IMPORT_C void NotifyChangeL( 

            const TUid& aUid, 

            const TUint aId, 

            MPhoneCenRepObserver* aObserver );

        /**

        * Cancel request. If you don't want to receive notification of the 

        * setting you issued before, call this function.

        * @param aObserver The observer that have issued request before

        * @param aId The setting which is to be canceled

        */

        IMPORT_C void CancelNotify( 

            MPhoneCenRepObserver* aObserver,

            const TUint aId );

        /**

        * Return boolean value that states whether or not 

        * the indicated feature is supported.

        * @param aFeatureId the feature that is inspected (see values from 

        *        TelephonyVariant.hrh)

        * @return whether or not the feature is supported.

        */

        IMPORT_C TBool IsTelephonyFeatureSupported( const TInt aFeatureId );

        /**

        * Return boolean value that states whether or not 

        * the indicated feature is supported.

        * @param aFeatureId the feature that is inspected (see values from 

        *        PhoneUIVariant.hrh)

        * @return whether or not the feature is supported.

        */

        IMPORT_C TBool IsPhoneUIFeatureSupported( const TInt aFeatureId );

        /**

         * Get keys from given value range

         * @param aUid identifing the central repository UID.

         * @param aPartial partial key to be found

         * @param aMask mask for partial key

         * @param aValues reference to array object for found keys

         * @return KErrNone if successful, system wide error code otherwise.

         */

        IMPORT_C TInt Find(

                const TUid& aUid,

                const TUint32 aPartial, 

                const TUint32 aMask,

                RArray<TUint32>& aValues ) const;

        /**

        * Fetches values from central repository

        * @param aAppInfo reference to object containing info for 

        * application launching

        * @param aCode ascii value of the pressed key

        * @param aAppParam application parameter

        * @param aValuesFetched ETrue if values fetched ok

        */

        IMPORT_C void FetchValuesFromCenRepL( TPhoneCmdParamAppInfo& aAppInfo, 

                                        TKeyCode aCode,

                                        HBufC8* aAppParam, TBool& aValuesFetched );

    public: // New methods

        /**

        * Handle notifications from central repository observers

        * @param aUid identifing the central repository UID.

        * @param aId central repository ID.

        */

        void HandleNotify( 

            const TUid& aUid, 

            const TUint aId );

    private:

        /**

        * Two-phased constructor.

        * @return new instance.

        */

        static CPhoneCenRepProxy* NewL();

        /**

        * C++ default constructor.

        */

        CPhoneCenRepProxy();

        /**

        * By default Symbian OS constructor is private.

        */

        void ConstructL();

    private:

        /**

        * Find the observer for specific setting on aUid and aId

        * @param aUid identifing the central repository UID.

        * @param aId central repository ID.

        * @param aFromIndex find next observer interested in this setting after 

        *               aIndex

        * @return The index of the observer if it's found and KErrNotFound if 

        *         not

        */

        TInt FindByUidId( 

            const TUid& aUid, 

            const TUint aId, 

            TInt aFromIndex = 0 );

        /**

        * Find the specific Observer

        * @param aObserver The pointer of the observer

        * @param aId central repository ID.

        * @return The index in iObserverArray. KErrNotFound if can't find the 

                  specific observer

        */

        TInt FindByObserverId( 

            const MPhoneCenRepObserver* aObserver,

            const TUint aId );

        /**

        * Finds observer by uid, key and observer.

        * @param aUid identifing the central repository UID.

        * @param aId central repository ID.

        * @param aObserver The pointer of the observer

        */

        TInt FindByUidIdObserver( 

            const TUid& aUid, 

            const TUint aId, 

            MPhoneCenRepObserver* aObserver );

        /**

        * Returns Telephony variant read-only data.

        * @return error code.

        */

        TInt GetTelephonyVariantData();  

        /**

        * Returns PhoneUI variant read-only data.

        * @return error code.

        */

        TInt GetPhoneUIVariantData();  

        /**

        * Cancel all request by the observer. 

        * @param aObserver

        */

        void CancelAllObserverNotifies( MPhoneCenRepObserver* aObserver );

        /**

        * Cancel all requests from all observers.

        */

        void CancelAllNotifies();

    private:    // Data

        // Defines information of one observer.

        class TCenRepObserverTag

            {

            public:

                TUid iUid;

                TUint iId;

                MPhoneCenRepObserver* iObserver;

            };

        // Owned array of observers.

        CArrayFixFlat<TCenRepObserverTag>* iObserverArray;

        // Central Repository event handlers.

        CPhoneCenRepEventHandler* iCenRepAccessoryEventHandler;

        CPhoneCenRepEventHandler* iCenRepNetworkEventHandler;

        CPhoneCenRepEventHandler* iCenRepThemesEventHandler;

        CPhoneCenRepEventHandler* iCenRepLanguageEventHandler;

        CPhoneCenRepEventHandler* iCenRepQwertyEventHandler;

        CPhoneCenRepEventHandler* iCenRepKDRMHelperEventHandler;

        //Local Telephony variant read-only data.

        TInt iTelephonyVariantReadOnlyValues;

        //Local PhoneUI variant read-only data.

        TInt iPhoneUIVariantReadOnlyValues;

    };

#endif      // __CPHONECENREPPROXY_H

// End of File