Simplify flight startup time calls.

We can always estimate a startup time now. Remove the nullability from
the result, cleanup the callsites, and eliminate
TotEstimator.mission_start_time since it no longer does anything useful.

game/ato/flightplans/flightplan.py

@@ -253,8 +253,8 @@ class FlightPlan(ABC, Generic[LayoutT]):
     def takeoff_time(self) -> timedelta:
         return self.tot - self._travel_time_to_waypoint(self.tot_waypoint)
 
-    def startup_time(self) -> timedelta | None:
-        start_time: timedelta = (
+    def startup_time(self) -> timedelta:
+        start_time = (
             self.takeoff_time() - self.estimate_startup() - self.estimate_ground_ops()
         )
 

game/ato/flightstate/uninitialized.py

@@ -5,7 +5,6 @@ from typing import TYPE_CHECKING
 
 from dcs import Point
 
-from game.ato.traveltime import TotEstimator
 from .flightstate import FlightState
 from ..starttype import StartType
 
@@ -36,8 +35,7 @@ class Uninitialized(FlightState):
 
     @property
     def description(self) -> str:
-        estimator = TotEstimator(self.flight.package)
-        delay = estimator.mission_start_time(self.flight)
+        delay = self.flight.flight_plan.startup_time()
         if self.flight.start_type is StartType.COLD:
             action = "Starting up"
         elif self.flight.start_type is StartType.WARM:

game/ato/traveltime.py

@@ -1,6 +1,5 @@
 from __future__ import annotations
 
-import logging
 import math
 from datetime import timedelta
 from typing import TYPE_CHECKING
@@ -57,15 +56,6 @@ class TotEstimator:
     def __init__(self, package: Package) -> None:
         self.package = package
 
-    @staticmethod
-    def mission_start_time(flight: Flight) -> timedelta:
-        startup_time = flight.flight_plan.startup_time()
-        if startup_time is None:
-            # Could not determine takeoff time, probably due to a custom flight
-            # plan. Start immediately.
-            return timedelta()
-        return startup_time
-
     def earliest_tot(self) -> timedelta:
         if not self.package.flights:
             return timedelta(0)
@@ -83,9 +73,9 @@ class TotEstimator:
 
     @staticmethod
     def earliest_tot_for_flight(flight: Flight) -> timedelta:
-        """Estimate fastest time from mission start to the target position.
+        """Estimate the fastest time from mission start to the target position.
 
-        For BARCAP flights, this is time to race track start. This ensures that
+        For BARCAP flights, this is time to the racetrack start. This ensures that
         they are on station at the same time any other package members reach
         their ingress point.
 
@@ -106,10 +96,4 @@ class TotEstimator:
             time = flight.flight_plan.startup_time()
         finally:
             flight.package.time_over_target = orig_tot
-
-        if time is None:
-            logging.warning(f"Cannot estimate TOT for {flight}")
-            # Return 0 so this flight's travel time does not affect the rest
-            # of the package.
-            return timedelta()
         return -time

game/sim/aircraftsimulation.py

@@ -16,7 +16,6 @@ from game.ato.flightstate import (
     WaitingForStart,
 )
 from game.ato.starttype import StartType
-from game.ato.traveltime import TotEstimator
 from .combat import CombatInitiator, FrozenCombat
 from .simulationresults import SimulationResults
 
@@ -74,8 +73,7 @@ class AircraftSimulation:
     def set_initial_flight_states(self) -> None:
         now = self.game.conditions.start_time
         for flight in self.iter_flights():
-            estimator = TotEstimator(flight.package)
-            start_time = estimator.mission_start_time(flight)
+            start_time = flight.flight_plan.startup_time()
             if start_time <= timedelta():
                 self.set_active_flight_state(flight, now)
             else:

qt_ui/models.py

@@ -16,7 +16,6 @@ from game.ato.airtaaskingorder import AirTaskingOrder
 from game.ato.flight import Flight
 from game.ato.flighttype import FlightType
 from game.ato.package import Package
-from game.ato.traveltime import TotEstimator
 from game.game import Game
 from game.server import EventStream
 from game.sim.gameupdateevents import GameUpdateEvents
@@ -136,11 +135,11 @@ class PackageModel(QAbstractListModel):
             return flight
         return None
 
-    def text_for_flight(self, flight: Flight) -> str:
+    @staticmethod
+    def text_for_flight(flight: Flight) -> str:
         """Returns the text that should be displayed for the flight."""
-        estimator = TotEstimator(self.package)
         delay = datetime.timedelta(
-            seconds=int(estimator.mission_start_time(flight).total_seconds())
+            seconds=int(flight.flight_plan.startup_time().total_seconds())
         )
         origin = flight.from_cp.name
         return f"{flight} from {origin} in {delay}"

qt_ui/widgets/QTopPanel.py

@@ -12,9 +12,9 @@ from PySide2.QtWidgets import (
 import qt_ui.uiconstants as CONST
 from game import Game, persistency
 from game.ato.package import Package
+from game.ato.traveltime import TotEstimator
 from game.profiling import logged_duration
 from game.utils import meters
-from game.ato.traveltime import TotEstimator
 from qt_ui.models import GameModel
 from qt_ui.simcontroller import SimController
 from qt_ui.widgets.QBudgetBox import QBudgetBox
@@ -156,9 +156,8 @@ class QTopPanel(QFrame):
         for package in self.game_model.ato_model.ato.packages:
             if not package.flights:
                 continue
-            estimator = TotEstimator(package)
             for flight in package.flights:
-                if estimator.mission_start_time(flight).total_seconds() < 0:
+                if flight.flight_plan.startup_time().total_seconds() < 0:
                     packages.append(package)
                     break
         return packages

qt_ui/windows/mission/QFlightItem.py

@@ -1,8 +1,7 @@
-from PySide2.QtGui import QStandardItem, QIcon
+from PySide2.QtGui import QIcon, QStandardItem
 
-from game.ato.package import Package
 from game.ato.flight import Flight
-from game.ato.traveltime import TotEstimator
+from game.ato.package import Package
 from qt_ui.uiconstants import AIRCRAFT_ICONS
 
 
@@ -17,6 +16,4 @@ class QFlightItem(QStandardItem):
             icon = QIcon((AIRCRAFT_ICONS[self.flight.unit_type.dcs_id]))
             self.setIcon(icon)
         self.setEditable(False)
-        estimator = TotEstimator(self.package)
-        delay = estimator.mission_start_time(flight)
-        self.setText(f"{flight} in {delay}")
+        self.setText(f"{flight} in {flight.flight_plan.startup_time()}")

qt_ui/windows/mission/QPlannedFlightsView.py

@@ -4,10 +4,9 @@ from PySide2.QtCore import QItemSelectionModel, QSize
 from PySide2.QtGui import QStandardItemModel
 from PySide2.QtWidgets import QAbstractItemView, QListView
 
+from game.theater.controlpoint import ControlPoint
 from qt_ui.models import GameModel
 from qt_ui.windows.mission.QFlightItem import QFlightItem
-from game.theater.controlpoint import ControlPoint
-from game.ato.traveltime import TotEstimator
 
 
 class QPlannedFlightsView(QListView):
@@ -52,4 +51,4 @@ class QPlannedFlightsView(QListView):
 
     @staticmethod
     def mission_start_for_flight(flight_item: QFlightItem) -> timedelta:
-        return TotEstimator(flight_item.package).mission_start_time(flight_item.flight)
+        return flight_item.flight.flight_plan.startup_time()

qt_ui/windows/mission/flight/settings/FlightAirfieldDisplay.py

@@ -5,7 +5,6 @@ from PySide2.QtWidgets import QGroupBox, QLabel, QMessageBox, QVBoxLayout
 from game import Game
 from game.ato.flight import Flight
 from game.ato.flightplans.planningerror import PlanningError
-from game.ato.traveltime import TotEstimator
 from qt_ui.models import PackageModel
 from qt_ui.widgets.QLabeledWidget import QLabeledWidget
 from qt_ui.widgets.combos.QArrivalAirfieldSelector import QArrivalAirfieldSelector
@@ -58,9 +57,7 @@ class FlightAirfieldDisplay(QGroupBox):
             # handler may be called for a flight whose package has been canceled, which
             # is an invalid state for calling anything in TotEstimator.
             return
-        estimator = TotEstimator(self.package_model.package)
-        delay = estimator.mission_start_time(self.flight)
-        self.departure_time.setText(f"At T+{delay}")
+        self.departure_time.setText(f"At T+{self.flight.flight_plan.startup_time()}")
 
     def set_divert(self, index: int) -> None:
         old_divert = self.flight.divert