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/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file refresh.h Declaration of link refreshing utility. */
#ifndef REFRESH_H
#define REFRESH_H
#include "../cargo_type.h"
#include "../vehicle_base.h"
#include <list>
#include <map>
/**
* Utility to refresh links a consist will visit.
*/
class LinkRefresher {
public:
static void Run(Vehicle *v);
protected:
/**
* Various flags about properties of the last examined link that might have
* an influence on the next one.
*/
enum RefreshFlags {
USE_NEXT, ///< There has been a previous link. Try to use the given next order.
HAS_CARGO, ///< Consist could leave the last stop where it could interact with cargo carrying cargo (i.e. not an "unload all" + "no loading" order).
WAS_REFIT, ///< Consist was refit since the last stop where it could interact with cargo.
RESET_REFIT ///< Consist had a chance to load since the last refit and the refit capacities can be reset.
};
/**
* Simulated cargo type and capacity for prediction of future links.
*/
struct RefitDesc {
CargoID cargo; ///< Cargo type the vehicle will be carrying.
uint16 capacity; ///< Capacity the vehicle will have.
uint16 remaining; ///< Capacity remaining from before the previous refit.
RefitDesc(CargoID cargo, uint16 capacity, uint16 remaining) :
cargo(cargo), capacity(capacity), remaining(remaining) {}
};
typedef std::list<RefitDesc> RefitList;
typedef std::map<CargoID, uint> CapacitiesMap;
Vehicle *vehicle; ///< Vehicle for which the links should be refreshed.
const Order *first; ///< Order to be checked first. If this is encountered again the refreshing is considered finished.
CapacitiesMap capacities; ///< Current added capacities per cargo ID in the consist.
RefitList refit_capacities; ///< Current state of capacity remaining from previous refits versus overall capacity per vehicle in the consist.
uint hops; ///< Number of hops already used up. If more than two times the number of orders in the list have been checked refreshing is stopped.
LinkRefresher(Vehicle *v);
void HandleRefit(const Order *next);
void ResetRefit();
void RefreshStats(const Order *cur, const Order *next);
const Order *PredictNextOrder(const Order *cur, const Order *next, uint8 flags);
void RefreshLinks(const Order *cur, const Order *next, uint8 flags);
};
#endif // REFRESH_H
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