cpp/openttd-patchpack/source Files · src/ai/api/ai_subsidy.cpp

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peter1138

(svn r15389) -Feature: Add ability to select which base graphics set is used from the Game Options window. The change takes effect when the window is closed. This option can only be used from the intro menu, as reloading graphics during a game may cause issues.

/* $Id$ */

/** @file ai_subsidy.cpp Implementation of AISubsidy. */

#include "ai_subsidy.hpp"
#include "ai_date.hpp"
#include "../../economy_func.h"
#include "../../station_base.h"
#include "../../cargotype.h"

/* static */ bool AISubsidy::IsValidSubsidy(SubsidyID subsidy_id)
{
	return subsidy_id < lengthof(_subsidies) && _subsidies[subsidy_id].cargo_type != CT_INVALID;
}

/* static */ bool AISubsidy::IsAwarded(SubsidyID subsidy_id)
{
	if (!IsValidSubsidy(subsidy_id)) return false;

	return _subsidies[subsidy_id].age >= 12;
}

/* static */ AICompany::CompanyID AISubsidy::GetAwardedTo(SubsidyID subsidy_id)
{
	if (!IsAwarded(subsidy_id)) return AICompany::COMPANY_INVALID;

	return (AICompany::CompanyID)((byte)GetStation(_subsidies[subsidy_id].from)->owner);
}

/* static */ int32 AISubsidy::GetExpireDate(SubsidyID subsidy_id)
{
	if (!IsValidSubsidy(subsidy_id)) return -1;

	int year = AIDate::GetYear(AIDate::GetCurrentDate());
	int month = AIDate::GetMonth(AIDate::GetCurrentDate());

	if (IsAwarded(subsidy_id)) {
		month += 24 - _subsidies[subsidy_id].age;
	} else {
		month += 12 - _subsidies[subsidy_id].age;
	}

	year += (month - 1) / 12;
	month = ((month - 1) % 12) + 1;

	return AIDate::GetDate(year, month, 1);
}

/* static */ CargoID AISubsidy::GetCargoType(SubsidyID subsidy_id)
{
	if (!IsValidSubsidy(subsidy_id)) return CT_INVALID;

	return _subsidies[subsidy_id].cargo_type;
}

/* static */ bool AISubsidy::SourceIsTown(SubsidyID subsidy_id)
{
	if (!IsValidSubsidy(subsidy_id) || IsAwarded(subsidy_id)) return false;

	return GetCargo(GetCargoType(subsidy_id))->town_effect == TE_PASSENGERS ||
	       GetCargo(GetCargoType(subsidy_id))->town_effect == TE_MAIL;
}

/* static */ int32 AISubsidy::GetSource(SubsidyID subsidy_id)
{
	if (!IsValidSubsidy(subsidy_id)) return INVALID_STATION;

	return _subsidies[subsidy_id].from;
}

/* static */ bool AISubsidy::DestinationIsTown(SubsidyID subsidy_id)
{
	if (!IsValidSubsidy(subsidy_id) || IsAwarded(subsidy_id)) return false;

	switch (GetCargo(GetCargoType(subsidy_id))->town_effect) {
		case TE_PASSENGERS:
		case TE_MAIL:
		case TE_GOODS:
		case TE_FOOD:
			return true;
		default:
			return false;
	}
}

/* static */ int32 AISubsidy::GetDestination(SubsidyID subsidy_id)
{
	if (!IsValidSubsidy(subsidy_id)) return INVALID_STATION;

	return _subsidies[subsidy_id].to;
}