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/*
kopetefilterchain.h - Kopete Message Filter Chain
Copyright (c) 2004 by Richard Smith <kde@metafoo.co.uk>
Kopete (c) 2002-2004 by the Kopete developers <kopete-devel@kde.org>
*************************************************************************
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
* *
*************************************************************************
*/
#ifndef KOPETEFILTERCHAIN_H
#define KOPETEFILTERCHAIN_H
#include <tqobject.h>
#include <kdemacros.h>
#include <ksharedptr.h>
#include "kopetemessage.h"
#include "kopetetask.h"
namespace Kopete
{
class MessageEvent;
class MessageHandler;
class ProcessMessageTask;
/**
* @brief A chain of message handlers; the processing layer between protocol and chat view
*
* This class represents a chain of connected message handlers.
*
* This class is the client of the chain of responsibility formed by the
* MessageHandlers, and acts as a facade for that chain, presenting a
* more convenient interface.
*
* @author Richard Smith <kde@metafoo.co.uk>
*/
class MessageHandlerChain : public TQObject, private TDEShared
{
Q_OBJECT
public:
friend class TDESharedPtr<MessageHandlerChain>;
typedef TDESharedPtr<MessageHandlerChain> Ptr;
/**
* Create a new MessageHandlerChain object with the appropriate handlers for
* processing messages entering @p manager in direction @p direction.
*/
static Ptr create( ChatSession *manager, Message::MessageDirection direction );
ProcessMessageTask *processMessage( const Message &message );
int capabilities();
private:
MessageHandlerChain();
~MessageHandlerChain();
friend class ProcessMessageTask;
class Private;
Private *d;
};
/**
* @brief A task for processing a message
* @author Richard Smith <kde@metafoo.co.uk>
*/
class ProcessMessageTask : public Task
{
Q_OBJECT
public:
MessageEvent *event();
private slots:
void slotStart();
void slotDone();
private:
ProcessMessageTask(MessageHandlerChain::Ptr, MessageEvent *event);
~ProcessMessageTask();
friend class MessageHandlerChain;
class Private;
Private *d;
};
}
#endif
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