cbs/CbsServer/ClientSrc/RCbsTopicMessages.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:11:09 +0200
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/*
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* Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  This module contains the implementation of RCbsTopicMessages class 
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                 member functions.
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*
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*/
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// INCLUDE FILES
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#include "CbsServerConstants.h"
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#include "RCbs.h"
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#include "RCbsTopicMessages.h"
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// ================= MEMBER FUNCTIONS =======================
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// -----------------------------------------------------------------------------
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// RCbsTopicMessages::RCbsTopicMessages
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// C++ default constructor can NOT contain any code, that
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// might leave.
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// -----------------------------------------------------------------------------
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//
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RCbsTopicMessages::RCbsTopicMessages()
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    {
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    }
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// -----------------------------------------------------------------------------
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// RCbsTopicMessages::Open
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// Creates a subsession to the server.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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//  
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TInt RCbsTopicMessages::Open( 
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    RCbs& aServer )
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    {
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    const TIpcArgs args( TIpcArgs::ENothing );
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    return CreateSubSession( aServer, ECbsCreateTopicMessagesSubsession, args );
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    }
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// -----------------------------------------------------------------------------
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// RCbsTopicMessages::Close
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// Closes the subsession.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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// 
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TInt RCbsTopicMessages::Close()
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    {
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    // Release locked message, if any
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    TCbsMessageHandle handle( 0 );
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    LockMessage( handle );
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    // Close the subsession.
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    RSubSessionBase::CloseSubSession( ECbsCloseTopicMessagesSubsession );
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    return KErrNone;
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    }
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// -----------------------------------------------------------------------------
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// RCbsTopicMessages::GetMessageCount
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// Returns the total amount of messages the topic contains.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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// 
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TInt RCbsTopicMessages::GetMessageCount( 
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    TCbsTopicNumber aNumber, 
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    TInt& aCount )
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    {
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    // Send request to get the total amount of messages
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    aCount = 0;
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    TPckgBuf< TInt > pckgCount( aCount );    
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    const TIpcArgs args( aNumber, &pckgCount );
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    TInt result = SendReceive( ECbsGetMessageCount, args );
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    // If everything went fine, give the result to the client.
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    if ( result == KErrNone )
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        {
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        aCount = pckgCount();
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        }
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    return result;
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    }
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// -----------------------------------------------------------------------------
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// RCbsTopicMessages::GetMessage
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// Returns message information.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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// 
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TInt RCbsTopicMessages::GetMessage( 
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    TCbsTopicNumber aNumber, 
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    TInt aIndex, 
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    TCbsMessage& aMessage )
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    {
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    // Send request to get the message from server
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    TPckgBuf< TCbsMessage > pckgMessage;
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    const TIpcArgs args( aNumber, aIndex, &pckgMessage );
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    TInt result = SendReceive( ECbsGetMessage, args );
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    if ( result == KErrNone )
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        {
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        aMessage = pckgMessage();
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        }
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    else
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        {
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        aMessage.iHandle = 0;
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        }
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    return result;
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    }
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// -----------------------------------------------------------------------------
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// RCbsTopicMessages::FindMessageByHandle
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// Finds a message by given handle.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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// 
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TInt RCbsTopicMessages::FindMessageByHandle( 
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    const TCbsMessageHandle& aHandle, 
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    TCbsMessage& aMessage )
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    {
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    // Send request to the server to find a message by handle
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    TPckgBuf< TCbsMessageHandle > pckgHandle( aHandle );
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    TPckgBuf< TCbsMessage > pckgMessage;
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    const TIpcArgs args( &pckgHandle, &pckgMessage );
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    TInt result = SendReceive( ECbsFindMessageByHandle, args );
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    // If everything went fine, update the message
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    if ( result == KErrNone )
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        {
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        aMessage = pckgMessage();
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        }
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    else
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        {
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        aMessage.iHandle = 0;
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        }
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    return result;
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    }
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// -----------------------------------------------------------------------------
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// RCbsTopicMessages::GetMessageIndexByHandle
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// Returns the index of a message with given handle in topic.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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// 
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TInt RCbsTopicMessages::GetMessageIndexByHandle( 
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    const TCbsMessageHandle& aHandle, 
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    TInt& aIndex )
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    {
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    TPckgBuf< TCbsMessageHandle > pckgHandle( aHandle );
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    TPckgBuf< TInt > pckgIndex( 0 );
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    const TIpcArgs args( &pckgHandle, &pckgIndex );
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    TInt result( SendReceive( ECbsGetMessageIndexByHandle, args ) );
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    if ( result == KErrNone )
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        {
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        aIndex = pckgIndex();
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        }
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    return result;
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    }
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// -----------------------------------------------------------------------------
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// RCbsTopicMessages::DeleteMessage
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// Deletes an existing message.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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// 
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TInt RCbsTopicMessages::DeleteMessage( 
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    const TCbsMessageHandle& aHandle )
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    {
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    // Send request to delete a message by handle
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    TPckgBuf< TCbsMessageHandle > pckgHandle( aHandle );
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    const TIpcArgs args( &pckgHandle );
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    return SendReceive( ECbsDeleteMessage, args );
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    }
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// -----------------------------------------------------------------------------
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// RCbsTopicMessages::SaveMessage
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// Saves a message (i.e., the saved message won't be deleted to make 
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// room for new messages).
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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// 
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TInt RCbsTopicMessages::SaveMessage( 
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    const TCbsMessageHandle& aHandle )
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    {
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    // Send request to save a message by handle
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    TPckgBuf< TCbsMessageHandle > pckgHandle( aHandle );
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    const TIpcArgs args( &pckgHandle );
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    return SendReceive( ECbsSaveMessage, args );
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    }
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// -----------------------------------------------------------------------------
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// RCbsTopicMessages::LockMessage
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// Locks the message.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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// 
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TInt RCbsTopicMessages::LockMessage( 
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    const TCbsMessageHandle& aHandle )
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    {
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    TPckgBuf< TCbsMessageHandle > pckgHandle( aHandle );
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    const TIpcArgs args( &pckgHandle );
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    return SendReceive( ECbsLockMessage, args );
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    }
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// -----------------------------------------------------------------------------
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// RCbsTopicMessages::ReadMessage
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// Sets the message as read.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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// 
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TInt RCbsTopicMessages::ReadMessage( 
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    const TCbsMessageHandle& aHandle )
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    {
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    // Send request to set message read by handle
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    TPckgBuf< TCbsMessageHandle > pckgHandle( aHandle );
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    const TIpcArgs args( &pckgHandle );
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    return SendReceive( ECbsReadMessage, args );
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    }
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// -----------------------------------------------------------------------------
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// RCbsTopicMessages::GetMessageContents
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// Returns the message contents.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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// 
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TInt RCbsTopicMessages::GetMessageContents( 
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    const TCbsMessageHandle& aHandle, 
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    TDes& aBuffer )
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    {
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    // Send request to get the message contents
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    TPckgBuf< TCbsMessageHandle > pckgHandle( aHandle );
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    TInt length = aBuffer.MaxLength();
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    const TIpcArgs args( &pckgHandle, length, &aBuffer );
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    TInt result( SendReceive( ECbsGetMessageContents, args ) );
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    if ( result != KErrNone )
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        {
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        aBuffer.Zero();
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        }
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    return result;
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    }
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// -----------------------------------------------------------------------------
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// RCbsTopicMessages::GetNextAndPrevMessageHandle
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// Returns the handles of messages that precede and succeed the 
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// given message in server-side list of topic messages.
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// (other items were commented in a header).
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// -----------------------------------------------------------------------------
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// 
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TInt RCbsTopicMessages::GetNextAndPrevMessageHandle(
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	const TCbsMessageHandle& aCurrentMsgHandle,
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	TCbsMessageHandle& aPrevMsgHandle,
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	TCbsMessageHandle& aNextMsgHandle,
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	TInt& aPosition )
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    {
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    TPckgBuf< TCbsMessageHandle > pckgCurrentMsg( aCurrentMsgHandle );
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    TPckgBuf< TCbsNextPrevMsgAndPosition > pckgResults;
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    const TIpcArgs args( &pckgCurrentMsg, &pckgResults );
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    TInt result( SendReceive( ECbsGetNextAndPrevMsgHandle, args ) );
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    if ( result == KErrNone )
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        {
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        aPrevMsgHandle = pckgResults().iPrevMsg;
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        aNextMsgHandle = pckgResults().iNextMsg;
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        aPosition = pckgResults().iPosition;
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        }
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    return result;
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    }
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// ================= OTHER EXPORTED FUNCTIONS ==============
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//  End of File