ServerGiftMoneyHandler.cpp

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D 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.
//
//    Scorched3D 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 Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#include <server/ServerGiftMoneyHandler.h>
#include <server/ScorchedServer.h>
#include <server/ServerShotHolder.h>
#include <server/ServerState.h>
#include <server/TurnController.h>
#include <tank/TankContainer.h>
#include <tank/TankState.h>
#include <tank/TankScore.h>
#include <engine/GameState.h>
#include <coms/ComsGiftMoneyMessage.h>
#include <coms/ComsMessageSender.h>
#include <common/OptionsTransient.h>
#include <common/Logger.h>

ServerGiftMoneyHandler *ServerGiftMoneyHandler::instance_ = 0;

ServerGiftMoneyHandler *ServerGiftMoneyHandler::instance()
{
        if (!instance_)
        {
                instance_ = new ServerGiftMoneyHandler;
        }
        return instance_;
}

ServerGiftMoneyHandler::ServerGiftMoneyHandler()
{
        ScorchedServer::instance()->getComsMessageHandler().addHandler(
                "ComsGiftMoneyMessage",
                this);
}

ServerGiftMoneyHandler::~ServerGiftMoneyHandler()
{
}

bool ServerGiftMoneyHandler::processMessage(
        NetMessage &netMessage,
        const char *messageType,
        NetBufferReader &reader)
{
        ComsGiftMoneyMessage message;
        if (!message.readMessage(reader)) return false;

        unsigned int fromPlayerId = message.getFromPlayerId();
        unsigned int toPlayerId = message.getToPlayerId();

        // Check we are at the correct time to buy anything
        if (ScorchedServer::instance()->getGameState().getState() != 
                ServerState::ServerStateBuying)
        {
                Logger::log( "ERROR: Player attempted to gift money but in incorrect state");
                return true;
        }

        // Check we are in the correct round no to buy anything
        if (ScorchedServer::instance()->getOptionsTransient().getCurrentGameNo() != 0)
        {
                Logger::log( "ERROR: Player attempted to gift money at incorrect time");
                return true;
        }

        // Check that is player still exists
        Tank *fromTank = ScorchedServer::instance()->
                getTankContainer().getTankById(fromPlayerId);
        if (!fromTank)
        {
                Logger::log( "ERROR: Player gifting does not exist");
                return true;
        }
        if (fromTank->getDestinationId() != netMessage.getDestinationId())
        {
                Logger::log( "ERROR: Player gifting does not exist at this destination");
                return true;
        }
        if (fromTank->getState().getState() != TankState::sNormal)
        {
                Logger::log( "ERROR: Player gifting is not alive");
                return true;
        }
        if (!TurnController::instance()->playerThisTurn(fromPlayerId))
        {
                Logger::log( "ERROR: Player gifting should not be buying");
                return true;            
        }

        // Check to player
        Tank *toTank = ScorchedServer::instance()->
                getTankContainer().getTankById(toPlayerId);
        if (!toTank)
        {
                Logger::log( "ERROR: Player gifting to does not exist");
                return true;
        }
        if (toTank->getState().getState() != TankState::sNormal &&
                toTank->getState().getState() != TankState::sDead)
        {
                Logger::log( "ERROR: Player gifting to is not alive");
                return true;
        }
        if (toTank->getTeam() != fromTank->getTeam())
        {
                Logger::log( "ERROR: Player gifting is in different teams");
                return true;
        }
        if (toTank == fromTank)
        {
                Logger::log( "ERROR: Player gifting to/from is same");
                return true;
        }

        // Check tank has required amount of money
        int money = message.getMoney();
        if (money < 0) return true;
        if (fromTank->getScore().getMoney() < money) return true;

        fromTank->getScore().setMoney(
                fromTank->getScore().getMoney() - money);
        toTank->getScore().setMoney(
                toTank->getScore().getMoney() + money);

        // Forward this message to the intended
        ComsMessageSender::sendToAllPlayingClients(message);

        return true;
}

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