/*

* Copyright (c) 2009 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:  Bluetooth serial client.

*

*/

#ifndef __BTSERIALCLIENT_H__

#define __BTSERIALCLIENT_H__

// INCLUDES

#include <e32base.h>

#include <es_sock.h>

#include <bt_sock.h>

#include <BTextNotifiers.h>

#include <BtSdp.h>

#include "SocketObserver.h"

// FORWARD DECLARATIONS

class CMessageServiceSearcher;

class CSocketsReader;

class CSocketsWriter;

class MBtSerialClientObserver

    {

public:

    virtual void ConnectedToServer(TInt aError) = 0;

    virtual void DisconnectedFromServer() = 0;

    virtual void DataFromServer(const TDesC8& aData) = 0;

    virtual void AllBufferedDataSent() = 0;

    };

/**

* CBtSerialClient

* Connects and sends messages to a remote machine using bluetooth

*/

class CBtSerialClient : public CActive, public MSocketObserver

    {

    public: // Constructors and destructor

        /**

        * NewL()

        * Construct a CBtSerialClient

        * @param aObserver the observer for this BT serial client

        * @return a pointer to the created instance of CBtSerialClient

        */

        IMPORT_C static CBtSerialClient* NewL( MBtSerialClientObserver& aObserver );

        /**

        * ~CBtSerialClient()

        * Destroy the object and release all memory objects.

        * Close any open sockets.

        */

        IMPORT_C virtual ~CBtSerialClient();

    public:     // New functions

        /**

        * ConnectL()

        * Connect to remote device. Query user for a device.

        */

        IMPORT_C void ConnectL();

        /**

        * ConnectL()

        * Connect to remote device.

        */

        IMPORT_C void ConnectL(const TBTDevAddr aBTServerDevice, const TInt aPort );

        /**

        * ConnectL()

        * Connect to remote device by device name.

        */

        IMPORT_C void ConnectL( const TDesC& aBTServerDeviceName, const TInt aPort );

        /**

        * DisconnectL()

        * Disconnect from remote machine

        */

        IMPORT_C void Disconnect();

        /**

        * IsConnecting()

        * @return ETrue if the client is establishing a

        * connection to the server.

        */

        IMPORT_C TBool Connecting();

        /**

        * Connected()

        * @return ETrue if the client is fully connected to the server.

        */

        IMPORT_C TBool Connected();

        /**

        * ServerAddressL()

        * @return address of connected server. Leaves with KErrNotReady, if

        * not connected.

        */

        TBTDevAddr ServerAddressL();

        /**

        * Add data to outgoing buffer and start sending it to client.

        *

        * Leaves with KErrOverflow, if the outgoing buffer cannot

        * be added all of the aData.

        * Leaves with KErrNotReady, if client is not connected.

        * When all data in internal buffer has been sent, observer

        * is notified (AllBufferedDataSent)

        */

        IMPORT_C void SendL(const TDesC8& aData);

        /**

        * Issue read operation. Will complete asyncronously.

        *

        * Leaves with KErrNotReady, if client is not connected.

        * Notifies observer, when some data has been read. Caller

        * is responsible for calling this method again to receive

        * more data.

        */

        IMPORT_C void ReadAsyncL();

        /**

        * Query free size of outgoing buffer.

        */

        IMPORT_C TInt FreeSpaceInSendBuffer();

        /**

        * Query max size of outgoing buffer.

        */

        IMPORT_C TInt SendBufferMaxSize();

        /**

        * Query the port of the service we are connected with

        * @return Port number or KErrDisconnected if not connected to a service

        */

        IMPORT_C TInt ServicePort();

    protected:    // from CActive

        /**

        * DoCancel()

        * Cancel any outstanding requests

        */

        void DoCancel();

        /**

        * RunL()

        * Respond to an event

        */

        void RunL();

    protected: // from MSocketObserver

        void ReportError( TErrorType aErrorType, TInt aErrorCode );

        void NewData( const TDesC8& aData );

        void AllBufferedDataSent();

    private:

        /**

        * ConnectToServerL

        * Connects to the service

        */

        void ConnectToServerL();

        /**

        * DisconnectFromServer()

        * Disconnects from the service

        */

        void DisconnectFromServer();

        /**

        * CBtSerialClient()

        * Constructs this object

        */

        CBtSerialClient( MBtSerialClientObserver& aObserver );

        /**

        * ConstructL()

        * Performs second phase construction of this object

        */

        void ConstructL();

    private:    // data

        /**

        * TState

        * The state of the active object, determines behaviour within

        * the RunL method.

        * EWaitingToGetDevice waiting for the user to select a device

        * EGettingDevice searching for a device

        * EGettingService searching for a service

        * EGettingConnection connecting to a service on a remote machine

        * EConnected connected to a service on a remote machine

        */

        enum TState

            {

            EWaitingToGetDevice,      // phase 1 of Connect

            EGettingDevice,           // phase 2 of Connect

            EGettingService,          // phase 3 of Connect

            EGettingConnection,       // phase 4 of Connect

            EConnected, // sending and receiving data

            EDisconnecting

            };

        MBtSerialClientObserver& iObserver;

        /** iState the current state of the client */

        TState iState;

        /**

        * iServiceSearcher searches for service this

        * client can connect to.

        * Owned by CBtSerialClient

        */

        CMessageServiceSearcher* iServiceSearcher;

        /**

        * iCurrentServiceIndex the index number of the service we are

        * currently connecting/connected to

        */

        TInt iCurrentServiceIndex;

        /** iSocketServer a connection to the socket server */

        RSocketServ iSocketServer;

        /** iSocket a socket to connect with */

        RSocket iSocket;

        /** iServiceClass the service class UUID to search for */

        TUUID iServiceClass;

        TBTDevAddr iBTServerDevice;

        CSocketsReader* iSocketReader;

        CSocketsWriter* iSocketWriter;

    };

#endif // __BTSERIALCLIENT_H__

// End of File