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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 ai_cargo.hpp Everything to query cargos. */
#ifndef AI_CARGO_HPP
#define AI_CARGO_HPP
#include "ai_object.hpp"
/**
* Class that handles all cargo related functions.
*/
class AICargo : public AIObject {
public:
/** Get the name of this class to identify it towards squirrel. */
static const char *GetClassName() { return "AICargo"; }
/**
* The classes of cargo (from newgrf_cargo.h).
*/
enum CargoClass {
CC_PASSENGERS = 1 << 0, ///< Passengers. Cargos of this class appear at bus stops. Cargos not of this class appear at truck stops.
CC_MAIL = 1 << 1, ///< Mail
CC_EXPRESS = 1 << 2, ///< Express cargo (Goods, Food, Candy, but also possible for passengers)
CC_ARMOURED = 1 << 3, ///< Armoured cargo (Valuables, Gold, Diamonds)
CC_BULK = 1 << 4, ///< Bulk cargo (Coal, Grain etc., Ores, Fruit)
CC_PIECE_GOODS = 1 << 5, ///< Piece goods (Livestock, Wood, Steel, Paper)
CC_LIQUID = 1 << 6, ///< Liquids (Oil, Water, Rubber)
CC_REFRIGERATED = 1 << 7, ///< Refrigerated cargo (Food, Fruit)
CC_HAZARDOUS = 1 << 8, ///< Hazardous cargo (Nuclear Fuel, Explosives, etc.)
CC_COVERED = 1 << 9, ///< Covered/Sheltered Freight (Transporation in Box Vans, Silo Wagons, etc.)
};
/**
* The effects a cargo can have on a town.
*/
enum TownEffect {
TE_NONE = 0, ///< This cargo has no effect on a town
TE_PASSENGERS = 1, ///< This cargo supplies passengers to a town
TE_MAIL = 2, ///< This cargo supplies mail to a town
TE_GOODS = 3, ///< This cargo supplies goods to a town
TE_WATER = 4, ///< This cargo supplies water to a town
TE_FOOD = 5, ///< This cargo supplies food to a town
};
/**
* Checks whether the given cargo type is valid.
* @param cargo_type The cargo to check.
* @return True if and only if the cargo type is valid.
*/
static bool IsValidCargo(CargoID cargo_type);
/**
* Gets the string representation of the cargo label.
* @param cargo_type The cargo to get the string representation of.
* @pre AICargo::IsValidCargo(cargo_type).
* @return The cargo label.
* @note Never use this to check if it is a certain cargo. NewGRF can
* redefine all of the names.
*/
static char *GetCargoLabel(CargoID cargo_type);
/**
* Checks whether the give cargo is a freight or not.
* This defines whether the "freight train weight multiplier" will apply to
* trains transporting this cargo.
* @param cargo_type The cargo to check on.
* @pre AICargo::IsValidCargo(cargo_type).
* @return True if and only if the cargo is freight.
*/
static bool IsFreight(CargoID cargo_type);
/**
* Check if this cargo is in the requested cargo class.
* @param cargo_type The cargo to check on.
* @pre AICargo::IsValidCargo(cargo_type).
* @param cargo_class The class to check for.
* @return True if and only if the cargo is in the cargo class.
*/
static bool HasCargoClass(CargoID cargo_type, CargoClass cargo_class);
/**
* Get the effect this cargo has on a town.
* @param cargo_type The cargo to check on.
* @pre AICargo::IsValidCargo(cargo_type).
* @return The effect this cargo has on a town, or TE_NONE if it has no effect.
*/
static TownEffect GetTownEffect(CargoID cargo_type);
/**
* Get the income for transporting a piece of cargo over the
* given distance within the specified time.
* @param cargo_type The cargo to transport.
* @pre AICargo::IsValidCargo(cargo_type).
* @param distance The distance the cargo travels from begin to end.
* @param days_in_transit Amount of (game) days the cargo is in transit. The max value of this variable is 637. Any value higher returns the same as 637 would.
* @return The amount of money that would be earned by this trip.
*/
static Money GetCargoIncome(CargoID cargo_type, uint32 distance, uint32 days_in_transit);
};
#endif /* AI_CARGO_HPP */
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