/*

* 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:  

*     MMS transport session

*

*/

#ifndef MMSSESSION_H

#define MMSSESSION_H

//  INCLUDES

#include <e32base.h>

#include <http/rhttpsession.h>

#include <mhttpsessioneventcallback.h>

#include <rhttpheaders.h>

// CONSTANTS

_LIT8( KProtocolHTTP, "HTTP/TCP" );

_LIT8( KXProfile, "x-wap-profile");

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

class CMmsTransaction;

class CMmsBearerStatus;

class RSocketServ;

class RConnection;

class MMmsCodecDataSupplier;

class MMmsCodecDataSink;

// CLASS DECLARATION

/**

* Class for MMS server MTM to send and fetch messages

* @since 2.0

* @lib mmstransport.lib

*/

class CMmsSession : public CActive, public MHTTPSessionEventCallback

    {

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        * @param aPriority Priority for this active object

        * @param aSocketServ opened socket server session

        * @param aConnection opened connection

        */

        IMPORT_C static CMmsSession* NewL(

            TInt aPriority,

            RSocketServ& aSocketServ,

            RConnection& aConnection );

        /**

        * Destructor.

        */

        virtual ~CMmsSession();

    public: // New functions

        /**

        * Initializes session headers for HTTP protocol.

        * @param aProxyAddress Proxy address: ip address + port

        * @param aUseProxy is a proxy to be used with this access point

        * @param aMaxReceiveSize maximum size of incoming message that can be accepted

        * @param aMaxSendSize maximum size of message to be sent ( needed for WAP only )

        * @param aStatus Status of the calling active object

        */

        IMPORT_C void OpenL(

            const TDesC8& aProxyAddress,

            const TBool aUseProxy,

            const TInt32 aMaxReceiveSize,

            const TInt32 aMaxSendSize,

            TRequestStatus& aStatus );

        /**

        * Delivers the message to MMSC.

        * @param aUri Uri of the MMSC

        * @param aMessageBuffer In/Out parameter. In: message to posted

        *    Out: response from MMSC

        * @param aDataSupplier The class that will serve as data supplier

        *        for chunked transfer.

        * @param aDataSink The class that will serve as data sink for chunked receive

        * @param aStatus Status of the calling active object

        */

        IMPORT_C void SendMessageL( 

            const TDesC& aUri,    

            CBufFlat& aMessageBuffer, 

            MMmsCodecDataSupplier&  aDataSupplier,

            MMmsCodecDataSink&      aDataSink,

            TRequestStatus& aStatus );

        /**

        * Get message from MMSC.

        * @param aUri URI of the message to fetch

        * @param aMessageBuffer Buffer for the message 

        * @param aDataSupplier The class that will serve as data supplier

        *        for chunked transfer.

        * @param aDataSink The class that will serve as data sink for chunked receive

        * @param aStatus Status of the calling active object

        */

        IMPORT_C void FetchMessageL( 

            const TDesC& aUri,

            CBufFlat& aMessageBuffer,

            TInt32 aExpectedReceiveSize,

            MMmsCodecDataSupplier&  aDataSupplier,

            MMmsCodecDataSink&      aDataSink,

            TRequestStatus& aStatus );

    public: // Functions from base classes

        /**

        * Session event Callback

        * from MHTTPSessionEventCallback

        * Called when the filters registration conditions are satisfied for events that occur

        * on the session.

        * @ param aEvent The session event that has occured.

        * @ exception Any leaves must be handled by the appropriate MHFRunError.

        */

        void MHFSessionRunL( const THTTPSessionEvent& aEvent );

        /**

        * Session event error Callback

        * from MHTTPSessionEventCallback

        * Called when MHFRunL leaves from a session event. This works in the same

        * way as CActve::RunError

        * @param aError The leave code that RunL left with.

        * @param aEvent The Event that was being processed.

        * @return KErrNone if the error has been cancelled or the code

        * of the continuing error otherwise.    

        */

        TInt MHFSessionRunError( TInt aError, const THTTPSessionEvent& aEvent );

    protected:  // New functions

    protected:  // Functions from base classes

        /**

        * From CActive 

        */

        virtual void DoCancel();

        /**

        * From CActive 

        */

        virtual void RunL();

    private:

        /**

        * C++ default constructor.

        */

        CMmsSession( TInt aPriority );

        /**

        * By default Symbian OS constructor is private.

        * @param aSocketServ opened socket server session

        * @param aConnection opened connection

        */

        void ConstructL( RSocketServ& aSocketServ, RConnection& aConnection );

        // By default, prohibit copy constructor

        CMmsSession( const CMmsSession& );

        // Prohibit assignment operator

        CMmsSession& operator= ( const CMmsSession& );

        /**

        * Set UserAgent string to a fixed value.

        * FOR TESTING PURPOSES ONLY.

        */

        void SetFixedUserAgentL();

        /**

        * Sets a header to be used throughout all transactions

        * @param aHeaders the header collection where the new header is inserted

        * @param aHdrField enumeration of the header field

        * @param aHdsValue the string value of the header to be set

        */

        void SetHeaderL(

            RHTTPHeaders aHeaders,

            TInt aHdrField,

            const TDesC8& aHdrValue );

    public:     // Data

    protected:  // Data

    private:    // Data

        enum TSessionStatus

            {

            ESessionIdle = 0,

            ESessionSending,

            ESessionFetching

            };

        TBool               iConnected;         // Do we have a connection to WAP GW       

        CMmsTransaction*    iTransaction;       // state machine for making transactions

        TRequestStatus*     iRequestStatus;     // status of the calling program        

        TSessionStatus      iSessionStatus;     // Status of the session object                                  

        RHTTPSession        iHTTPSession;       // transport session

        THTTPSessionEvent   iHTTPEvent;         // event from HTTP

        RHTTPHeaders        iSessionHeaders;    // headers common to all transactions

        TBool               iHeadersCreated;    // if headers have not been created, they cannot be deleted

        TBool               iSessionOpened;     // if HTTP session has not been opened, it cannot be closed

        CMmsBearerStatus*   iTransferControl;

        TInt                iTransactionTimeout;

        TInt                iMaxReceiveSize;

        TInt                iMaxSendSize;

        TInt                iError;

        RSocketServ*        iSocketServ;

        RConnection*        iConnection;

        HBufC8*             iUserAgent;

        HBufC8*             iUaProf;

        // pointer to the class that will serve as data supplier for chunked transfer.

        // pointer is owned by caller - we don't delete it

        MMmsCodecDataSupplier*  iDataSupplier;

        // pointer to the class that will serve as data sink for chunked receive.

        // pointer is owned by caller - we don't delete it

        MMmsCodecDataSink*      iDataSink;

    public:     // Friend classes

    protected:  // Friend classes

    private:    // Friend classes

    };

#endif      // MMSSESSION_H   

// End of File