/*
    This file is part of Kismet

    Kismet is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    Kismet is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Kismet; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/


#ifndef __MESSAGEBUS_H__
#define __MESSAGEBUS_H__

#include "config.h"

#include <string>
#include <vector>

// Message flags for queuing data
#define MSGFLAG_NONE    0
#define MSGFLAG_DEBUG   1
#define MSGFLAG_INFO    2
#define MSGFLAG_ERROR   4
#define MSGFLAG_FATAL   8
// Don't propogate it past local display systems
#define MSGFLAG_LOCAL   16
#define MSGFLAG_ALL     (MSGFLAG_DEBUG | MSGFLAG_INFO | \
                         MSGFLAG_ERROR | MSGFLAG_FATAL)

// A subscriber to the message bus.  It subscribes with a mask of 
// what messages it wants to handle
class MessageClient {
public:
    virtual void ProcessMessage(string in_msg, int in_flags) = 0;
};

class StdoutMessageClient : public MessageClient {
public:
    void ProcessMessage(string in_msg, int in_flags);
};

class MessageBus {
public:
    // Inject a message into the bus
    void InjectMessage(string in_msg, int in_flags);

    // Link a meessage display system
    void RegisterClient(MessageClient *in_subcriber, int in_mask);
    void RemoveClient(MessageClient *in_unsubscriber);

protected:
    typedef struct {
        MessageClient *client;
        int mask;
    } busclient;

    vector<MessageBus::busclient *> subscribers;
};


#endif