timer_game_economy.cpp

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/*
 * 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 <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */

 
#include "../stdafx.h"
#include "../openttd.h"
#include "timer.h"
#include "timer_game_economy.h"
#include "timer_game_tick.h"
#include "../vehicle_base.h"
#include "../linkgraph/linkgraph.h"
 
#include "../safeguards.h"
 
TimerGameEconomy::Year TimerGameEconomy::year = {};
TimerGameEconomy::Month TimerGameEconomy::month = {};
TimerGameEconomy::Date TimerGameEconomy::date = {};
TimerGameEconomy::DateFract TimerGameEconomy::date_fract = {};
uint TimerGameEconomy::days_since_last_month = {};

/* static */ TimerGameEconomy::YearMonthDay TimerGameEconomy::ConvertDateToYMD(TimerGameEconomy::Date date)
{
  /* If we're not using wallclock units, we keep the economy date in sync with the calendar. */
  if (!UsingWallclockUnits()) return CalendarConvertDateToYMD(date);
 
  /* If we're using wallclock units, economy months have 30 days and an economy year has 360 days. */
  TimerGameEconomy::YearMonthDay ymd;
  ymd.year = Year{date.base() / EconomyTime::DAYS_IN_ECONOMY_YEAR};
  ymd.month = (date.base() % EconomyTime::DAYS_IN_ECONOMY_YEAR) / EconomyTime::DAYS_IN_ECONOMY_MONTH;
  ymd.day = (date.base() % EconomyTime::DAYS_IN_ECONOMY_MONTH) + 1;
  return ymd;
}

/* static */ TimerGameEconomy::Date TimerGameEconomy::ConvertYMDToDate(TimerGameEconomy::Year year, TimerGameEconomy::Month month, TimerGameEconomy::Day day)
{
  /* If we're not using wallclock units, we keep the economy date in sync with the calendar. */
  if (!UsingWallclockUnits()) return CalendarConvertYMDToDate(year, month, day);
 
  /* If we're using wallclock units, economy months have 30 days and an economy year has 360 days. */
  const int total_months = (year.base() * EconomyTime::MONTHS_IN_YEAR) + month;
  return TimerGameEconomy::Date{(total_months * EconomyTime::DAYS_IN_ECONOMY_MONTH) + day - 1}; // Day is 1-indexed but Date is 0-indexed, hence the - 1.
}

/* static */ void TimerGameEconomy::SetDate(TimerGameEconomy::Date date, TimerGameEconomy::DateFract fract)
{
  assert(fract < Ticks::DAY_TICKS);
 
  TimerGameEconomy::date = date;
  TimerGameEconomy::date_fract = fract;
  TimerGameEconomy::YearMonthDay ymd = TimerGameEconomy::ConvertDateToYMD(date);
  TimerGameEconomy::year = ymd.year;
  TimerGameEconomy::month = ymd.month;
}

/* static */ bool TimerGameEconomy::UsingWallclockUnits(bool newgame)
{
  if (newgame) return (_settings_newgame.economy.timekeeping_units == TimekeepingUnits::Wallclock);
 
  return (_settings_game.economy.timekeeping_units == TimekeepingUnits::Wallclock);
}
 
template <>
void IntervalTimer<TimerGameEconomy>::Elapsed(TimerGameEconomy::TElapsed trigger)
{
  if (trigger == this->period.trigger) {
    this->callback(1);
  }
}
 
template <>
void TimeoutTimer<TimerGameEconomy>::Elapsed(TimerGameEconomy::TElapsed trigger)
{
  if (this->fired) return;
 
  if (trigger == this->period.trigger) {
    this->callback();
    this->fired = true;
  }
}
 
template <>
bool TimerManager<TimerGameEconomy>::Elapsed(TimerGameEconomy::TElapsed)
{
  if (_game_mode == GM_MENU) return false;
 
  TimerGameEconomy::date_fract++;
  if (TimerGameEconomy::date_fract < Ticks::DAY_TICKS) return true;
  TimerGameEconomy::date_fract = 0;
 
  /* increase day counter */
  TimerGameEconomy::date++;
  ++TimerGameEconomy::days_since_last_month;
 
  TimerGameEconomy::YearMonthDay ymd = TimerGameEconomy::ConvertDateToYMD(TimerGameEconomy::date);
 
  /* check if we entered a new month? */
  bool new_month = ymd.month != TimerGameEconomy::month;
 
  /* check if we entered a new year? */
  bool new_year = ymd.year != TimerGameEconomy::year;
 
  /* update internal variables before calling the daily/monthly/yearly loops */
  TimerGameEconomy::month = ymd.month;
  TimerGameEconomy::year = ymd.year;
 
  /* Make a temporary copy of the timers, as a timer's callback might add/remove other timers. */
  auto timers = TimerManager<TimerGameEconomy>::GetTimers();
 
  for (auto timer : timers) {
    timer->Elapsed(TimerGameEconomy::Trigger::Day);
  }
 
  if ((TimerGameEconomy::date.base() % 7) == 3) {
    for (auto timer : timers) {
      timer->Elapsed(TimerGameEconomy::Trigger::Week);
    }
  }
 
  if (new_month) {
    for (auto timer : timers) {
      timer->Elapsed(TimerGameEconomy::Trigger::Month);
    }
 
    if ((TimerGameEconomy::month % 3) == 0) {
      for (auto timer : timers) {
        timer->Elapsed(TimerGameEconomy::Trigger::Quarter);
      }
    }
  }
 
  if (new_year) {
    for (auto timer : timers) {
      timer->Elapsed(TimerGameEconomy::Trigger::Year);
    }
  }
 
  if (new_month) TimerGameEconomy::days_since_last_month = 0;
 
  /* check if we reached the maximum year, decrement dates by a year */
  if (TimerGameEconomy::year == EconomyTime::MAX_YEAR + 1) {
    TimerGameEconomy::year--;
    int days_this_year = TimerGameEconomy::IsLeapYear(TimerGameEconomy::year) ? EconomyTime::DAYS_IN_LEAP_YEAR : EconomyTime::DAYS_IN_YEAR;
    TimerGameEconomy::date -= TimerGameEconomy::Date{days_this_year};
    for (Vehicle *v : Vehicle::Iterate()) v->ShiftDates(TimerGameEconomy::Date{-days_this_year});
    for (LinkGraph *lg : LinkGraph::Iterate()) lg->ShiftDates(TimerGameEconomy::Date{-days_this_year});
  }
 
  return true;
}
 
#ifdef WITH_ASSERT
template <>
void TimerManager<TimerGameEconomy>::Validate(TimerGameEconomy::TPeriod period)
{
  if (period.priority == TimerGameEconomy::Priority::None) return;
 
  /* Validate we didn't make a developer error and scheduled more than one
   * entry on the same priority/trigger. There can only be one timer on
   * a specific trigger/priority, to ensure we are deterministic. */
  for (const auto &timer : TimerManager<TimerGameEconomy>::GetTimers()) {
    if (timer->period.trigger != period.trigger) continue;
 
    assert(timer->period.priority != period.priority);
  }
}
#endif /* WITH_ASSERT */