/*
 *    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; 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 this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 *    Author : Maxim Mamontov <faust@stargazer.dp.ua>
 */

#ifndef __UR_FUNCTOR_H__
#define __UR_FUNCTOR_H__

#include "rscript.h"

#include "stg/os_int.h"
#include "stg/common.h"

#include <functional>
#include <algorithm>
#include <utility>

namespace RS
{

class UpdateRouter : public std::unary_function<std::pair<const uint32_t, RS::USER>, void>
{
public:
    explicit UpdateRouter(REMOTE_SCRIPT & t)
        : obj(t) {}

    void operator() (std::pair<const uint32_t, USER> & val)
        {
        std::vector<uint32_t> newRouters = obj.IP2Routers(val.second.ip);
        std::vector<uint32_t>::const_iterator oldIt(val.second.routers.begin());
        std::vector<uint32_t>::const_iterator newIt(newRouters.begin());
        val.second.shortPacketsCount = 0;
        while (oldIt != val.second.routers.end() ||
               newIt != newRouters.end())
            {
            if (oldIt == val.second.routers.end())
                {
                if (newIt != newRouters.end())
                    {
                    obj.SendDirect(val.second, *newIt); // Connect on new router
                    ++newIt;
                    }
                }
            else if (newIt == newRouters.end())
                {
                obj.SendDirect(val.second, *oldIt, true); // Disconnect on old router
                ++oldIt;
                }
            else if (*oldIt < *newIt)
                {
                obj.SendDirect(val.second, *oldIt, true); // Disconnect on old router
                ++oldIt;
                }
            else if (*oldIt > *newIt)
                {
                obj.SendDirect(val.second, *newIt); // Connect on new router
                ++newIt;
                }
            else
                {
                ++oldIt;
                if (newIt != newRouters.end())
                    ++newIt;
                }
            }
        val.second.routers = newRouters;
        }
private:
    REMOTE_SCRIPT & obj;
};

} // namespace RS

#endif