Move unit delivery ownership out of the UI.

Breaks save compat, but we need to have this knowledge outside the UI so
we can know whether or not we can ferry aircraft to the airfield without
overflowing parking.

game/event/event.py

@@ -11,12 +11,12 @@ from dcs.unittype import UnitType
 from game import db, persistency
 from game.debriefing import Debriefing
 from game.infos.information import Information
-from game.operation.operation import Operation
 from game.theater import ControlPoint
 from gen.ground_forces.combat_stance import CombatStance
 
 if TYPE_CHECKING:
     from ..game import Game
+    from game.operation.operation import Operation
 
 DIFFICULTY_LOG_BASE = 1.1
 EVENT_DEPARTURE_MAX_DISTANCE = 340000

game/game.py

@@ -160,9 +160,6 @@ class Game:
     def _budget_player(self):
         self.budget += self.budget_reward_amount
 
-    def awacs_expense_commit(self):
-        self.budget -= AWACS_BUDGET_COST
-
     def units_delivery_event(self, to_cp: ControlPoint) -> UnitsDeliveryEvent:
         event = UnitsDeliveryEvent(attacker_name=self.player_name,
                                    defender_name=self.player_name,
@@ -172,10 +169,6 @@ class Game:
         self.events.append(event)
         return event
 
-    def units_delivery_remove(self, event: Event):
-        if event in self.events:
-            self.events.remove(event)
-
     def initiate_event(self, event: Event):
         #assert event in self.events
         logging.info("Generating {} (regular)".format(event))
@@ -242,6 +235,7 @@ class Game:
 
         self.aircraft_inventory.reset()
         for cp in self.theater.controlpoints:
+            cp.pending_unit_deliveries = self.units_delivery_event(cp)
             self.aircraft_inventory.set_from_control_point(cp)
 
         # Plan flights & combat for next turn

game/theater/controlpoint.py

@@ -33,6 +33,7 @@ from .theatergroundobject import (
 if TYPE_CHECKING:
     from game import Game
     from gen.flights.flight import FlightType
+    from ..event import UnitsDeliveryEvent
 
 
 class ControlPointType(Enum):
@@ -158,6 +159,7 @@ class ControlPoint(MissionTarget):
         self.cptype = cptype
         self.stances: Dict[int, CombatStance] = {}
         self.airport = None
+        self.pending_unit_deliveries: Optional[UnitsDeliveryEvent] = None
 
     @property
     def ground_objects(self) -> List[TheaterGroundObject]:
@@ -387,3 +389,7 @@ class OffMapSpawn(ControlPoint):
 
     def mission_types(self, for_player: bool) -> Iterator[FlightType]:
         yield from []
+
+    @property
+    def available_aircraft_slots(self) -> int:
+        return 1000