ai/gamestate_observer.cpp

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/* $Id: gamestate_observer.cpp 52533 2012-01-07 02:35:17Z shadowmaster $ */
/*
   Copyright (C) 2010 - 2012 by Yurii Chernyi <terraninfo@terraninfo.net>
   Part of the Battle for Wesnoth Project http://www.wesnoth.org/

   This program 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.
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY.

   See the COPYING file for more details.
*/

/**
 * Base gamestate observer - useful to see if the gamestate has changed
 * between two points of time
 * @file
 */

#include "manager.hpp"
#include "gamestate_observer.hpp"

namespace ai {
// =======================================================================

gamestate_observer::gamestate_observer()
    : gamestate_change_counter_(0)
{
    ai::manager::add_gamestate_observer(this);
}


gamestate_observer::~gamestate_observer()
{
    ai::manager::remove_gamestate_observer(this);
}


void gamestate_observer::handle_generic_event(const std::string &/*event_name*/)
{
    ++gamestate_change_counter_;
}


bool gamestate_observer::is_gamestate_changed()
{
    return (gamestate_change_counter_>0);
}


void gamestate_observer::reset()
{
    gamestate_change_counter_=0;
}

// =======================================================================
} //end of namespace ai