/*

* Copyright (c) 2010 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:  The repository of remote devices from BT registry

*

*/

#ifndef BTDEVICEREPOSITORYIMPL_H

#define BTDEVICEREPOSITORYIMPL_H

#include <bttypes.h>

#include <bt_sock.h>

#include <btmanclient.h>

#include <e32property.h>

#include <btengconnman.h>

#include <btservices/btsimpleactive.h>

#include <btservices/btdevextension.h>

class MBtDevRepositoryObserver;

/**

 *  Class CBtDevRepositoryImpl

 *

 *  This class keep a storage of remote device information.

 *

 */

NONSHARABLE_CLASS( CBtDevRepositoryImpl ) : 

    public CBase, 

    public MBtSimpleActiveObserver,

    public MBTEngConnObserver

    {

public:

    /**

     * Two-phase constructor

     */

    static CBtDevRepositoryImpl* NewL();

    /**

     * Destructor

     */

    ~CBtDevRepositoryImpl();

    /**

     * Add an observer to this reposity for receivng repository update

     * events.

     * @param aObserver the observer to be added.

     */

    void AddObserverL( MBtDevRepositoryObserver* aObserver );

    /**

     * Remove an observer from this repository.

     * @param aObserver the observer to be removed.

     */

    void RemoveObserver( MBtDevRepositoryObserver* aObserver );

    /**

     * Tells if this repository has finished the initialization.

     * Initialization completion means the repository has retieved all

     * Bluetooth devices from BT registry, and it is subscribing to

     * registry update events.

     */

    TBool IsInitialized() const;

    /**

     * Gets all devices in this repository.

     * @return the device list.

     */

    const RDevExtensionArray& AllDevices() const;

    /**

     * Get a specific device by the given address.

     * @param aAddr the address of the device to be retrieved

     * @return the device pointer, NULL if the device is unavailable.

     */

    const CBtDevExtension* Device( const TBTDevAddr& aAddr ) const;

    /**

     * Forces the repository to initialize its data store.

     * At Initialization completion, corresponding callback will be invoked.

     * Initialization completion means the repository has retieved all

     * Bluetooth devices from BT registry, and it is subscribing to

     * registry update events.

     * 

     */

     void ReInitialize();

    /**

     * Returns the service (limited to services managed in bteng scope)

     * level connection status of the specified device.

     *

     * @param aAddr the address of the device

     * @return one of TBTEngConnectionStatus enums

     */

    //TBTEngConnectionStatus IsDeviceConnected( const TBTDevAddr& aAddr );

private:

    // from MBtSimpleActiveObserver

    /**

     * Callback from RunL() to notify that an outstanding request has completed.

     *

     * @since Symbian^4

     * @param aActive Pointer to the active object that completed.

     * @param aStatus The status of the completed request.

     */

    void RequestCompletedL( CBtSimpleActive* aActive, TInt aStatus );

    /**

     * Callback from Docancel() for handling cancelation of an outstanding request.

     *

     * @since Symbian^4

     * @param aId The ID that identifies the outstanding request.

     */

    void CancelRequest( TInt aRequestId );

    /**

     * Callback from RunError() to notify that an error has occurred in RunL.

     *

     * @since Symbian^4

     * @param aActive Pointer to the active object that completed.

     * @param aError The error occurred in RunL.

     */

    void HandleError( CBtSimpleActive* aActive, TInt aError );

    // From MBTEngConnObserver

    /**

     * Indicates to the caller that a service-level connection has completed.

     * This function is called for both incoming and outgoing connections. 

     * This function is also called when an outgoing connection request fails, 

     * e.g. with error code KErrCouldNotConnect.

     * When this function is called, new commands can be issued to the 

     * CBTEngConnMan API immediately.

     * @param  aAddr The address of the remote device.

     * @param  aErr Status information of the connection. KErrNone if the

     *              connection succeeded, otherwise the error code with 

     *              which the outgoing connection failed. KErrAlreadyExists 

     *              is returned if there already is an existing connection 

     *              for the selected profile(s), or otherwise e.g. 

     *              KErrCouldNotConnect or KErrDisconnected for indicating 

     *              connection problems.

     * @param  aConflicts If there already is a connection for the selected 

     *                    profile(s) of an outgoing connection request (the 

     *                    selection is performed by BTEng), then this array 

     *                    contains the bluetooth device addresses of the 

     *                    remote devices for those connections.

     */

    void ConnectComplete( TBTDevAddr& aAddr, TInt aErr, 

                          RBTDevAddrArray* aConflicts = NULL );

    /**

     * Indicates to the caller that a service-level connection has disconnected.

     * When this function is called, new commands can be issued to the 

     * CBTEngConnMan API immediately.

     * 

     * @param  aAddr The address of the remote device.

     * @param  aErr The error code with which the disconnection occured. 

     *              KErrNone for a normal disconnection, 

     *              or e.g. KErrDisconnected if the connection was lost.

     */

    void DisconnectComplete( TBTDevAddr& aAddr, TInt aErr );

private:

    /**

     * C++ default constructor

     */

    CBtDevRepositoryImpl();

    /**

     * Symbian 2nd-phase constructor

     */

    void ConstructL();

    /**

     * Creates a registry view which shall contain all remote devices.

     */    

    void CreateRemoteDeviceView();

    /**

     * retrieves remote devices from registry.

     */

    void GetRemoteDevicesL();

    /**

     * handles the completion of paired device view creation

     */

    void HandleCreateRemoteDeviceViewCompletedL( TInt aStatus);

    /**

     * handles the completion of getting paired devices

     */

    void HandleGetRemoteDevicesCompletedL( TInt aStatus );

    /**

     * Copy the remote devices to internal array storage.

     */

    void UpdateRemoteDeviceRepositoryL();

private:

    /**

     * The observers

     * do not own them.

     */

    RPointerArray<MBtDevRepositoryObserver> iObservers;

    /**

     * Registry sub session for remote device db.

     * not own

     */

    RBTRegistry iBTRegistry;

    // own.

    RBTRegServ iBTRegServ;

    /**

     * AO for registry operations

     * own.

     */

    CBtSimpleActive* iRegistryActive;    

    /**

     * the counter of not handled registry events.

     */

    TInt iNotHandledRegEventCounter;

    /**

     * temporary instance to retrieve paired devices.

     * own.

     */

    CBTRegistryResponse* iRegRespRemoteDevices;

    /**

     * Property containing the BT registry change monitoring key

     * own.

     */

    RProperty iBtRegistryKey;

    /**

     * AO for subscribing registry PubSub key

     * own.

     */

    CBtSimpleActive* iRegistryKeyActive;  

    /**

     * For connection status

     */

    CBTEngConnMan* iBtengConn;

    /**

     * contains the list of all devices.

     * own.

     */

    RDevExtensionArray iDevices;

    TInt iInitialized;

    };

#endif /*BTDEVICEREPOSITORYIMPL_H*/