Method HandleRefit

src/linkgraph/refresh.cpp:68–118

* Handle refit orders by updating capacities and refit_capacities. * @param refit_cargo Cargo to refit to. * @return True if any vehicle was refit; false if none was. */

 * @return True if any vehicle was refit; false if none was.
 */
bool LinkRefresher::HandleRefit(CargoType refit_cargo)
{
	this->cargo = refit_cargo;
	RefitList::iterator refit_it = this->refit_capacities.begin();
	bool any_refit = false;
	for (Vehicle *v = this->vehicle; v != nullptr; v = v->Next()) {
		const Engine *e = Engine::Get(v->engine_type);
		if (!HasBit(e->info.refit_mask, this->cargo)) {
			++refit_it;
			continue;
		}
		any_refit = true;

		/* Back up the vehicle's cargo type */
		CargoType temp_cargo_type = v->cargo_type;
		uint8_t temp_subtype = v->cargo_subtype;
		v->cargo_type = this->cargo;
		v->cargo_subtype = GetBestFittingSubType(v, v, this->cargo);

		uint16_t mail_capacity = 0;
		uint amount = e->DetermineCapacity(v, &mail_capacity);

		/* Restore the original cargo type */
		v->cargo_type = temp_cargo_type;
		v->cargo_subtype = temp_subtype;

		/* Skip on next refit. */
		if (this->cargo != refit_it->cargo && refit_it->remaining > 0) {
			this->capacities[refit_it->cargo] -= refit_it->remaining;
			refit_it->remaining = 0;
		} else if (amount < refit_it->remaining) {
			this->capacities[refit_it->cargo] -= refit_it->remaining - amount;
			refit_it->remaining = amount;
		}
		refit_it->capacity = amount;
		refit_it->cargo = this->cargo;

		++refit_it;

		/* Special case for aircraft with mail. */
		if (v->type == VEH_AIRCRAFT) {
			if (mail_capacity < refit_it->remaining) {
				this->capacities[refit_it->cargo] -= refit_it->remaining - mail_capacity;
				refit_it->remaining = mail_capacity;
			}
			refit_it->capacity = mail_capacity;
			break; // aircraft have only one vehicle
		}
	}
	return any_refit;
}

/**
 * Restore capacities and refit_capacities as vehicle might have been able to load now.