Add FastAPI interface between the game and map.

A possible explanation for the infrequent CTDs we've been seeing since
adding fast forward is that QWebChannel doesn't keep a reference to the
python objects that it passes to js, so if the object is GC'd before the
front end is done with it, it crashes.

We don't really like QWebChannel anyway, so this begins replacing that
with FastAPI.

qt_ui/widgets/map/model/mapmodel.py

@@ -1,6 +1,5 @@
 from __future__ import annotations
 
-import json
 import logging
 from typing import List, Optional, Tuple
 
@@ -10,6 +9,7 @@ from dcs import Point
 from game import Game
 from game.ato.airtaaskingorder import AirTaskingOrder
 from game.profiling import logged_duration
+from game.server.leaflet import LeafletLatLon
 from game.sim.combat import FrozenCombat
 from game.sim.combat.aircombat import AirCombat
 from game.sim.combat.atip import AtIp
@@ -26,11 +26,7 @@ from .controlpointjs import ControlPointJs
 from .flightjs import FlightJs
 from .frontlinejs import FrontLineJs
 from .groundobjectjs import GroundObjectJs
-from .holdzonesjs import HoldZonesJs
 from .ipcombatjs import IpCombatJs
-from .ipzonesjs import IpZonesJs
-from .joinzonesjs import JoinZonesJs
-from .leaflet import LeafletLatLon
 from .mapzonesjs import MapZonesJs
 from .navmeshjs import NavMeshJs
 from .samcombatjs import SamCombatJs
@@ -69,12 +65,10 @@ class MapModel(QObject):
     navmeshesChanged = Signal()
     mapZonesChanged = Signal()
     unculledZonesChanged = Signal()
-    ipZonesChanged = Signal()
-    joinZonesChanged = Signal()
-    holdZonesChanged = Signal()
     airCombatsChanged = Signal()
     samCombatsChanged = Signal()
     ipCombatsChanged = Signal()
+    selectedFlightChanged = Signal(str)
 
     def __init__(self, game_model: GameModel, sim_controller: SimController) -> None:
         super().__init__()
@@ -91,9 +85,6 @@ class MapModel(QObject):
         self._navmeshes = NavMeshJs([], [])
         self._map_zones = MapZonesJs([], [], [])
         self._unculled_zones = []
-        self._ip_zones = IpZonesJs.empty()
-        self._join_zones = JoinZonesJs.empty()
-        self._hold_zones = HoldZonesJs.empty()
         self._selected_flight_index: Optional[Tuple[int, int]] = None
         self._air_combats = []
         self._sam_combats = []
@@ -128,7 +119,6 @@ class MapModel(QObject):
         self._navmeshes = NavMeshJs([], [])
         self._map_zones = MapZonesJs([], [], [])
         self._unculled_zones = []
-        self._ip_zones = IpZonesJs.empty()
         self._air_combats = []
         self._sam_combats = []
         self._ip_combats = []
@@ -155,7 +145,6 @@ class MapModel(QObject):
         else:
             self._selected_flight_index = index, 0
         self.select_current_flight()
-        self.reset_debug_zones()
 
     def set_flight_selection(self, index: int) -> None:
         self.deselect_current_flight()
@@ -174,7 +163,6 @@ class MapModel(QObject):
             self._selected_flight_index = self._selected_flight_index[0], None
         self._selected_flight_index = self._selected_flight_index[0], index
         self.select_current_flight()
-        self.reset_debug_zones()
 
     @property
     def _selected_flight(self) -> Optional[FlightJs]:
@@ -193,8 +181,10 @@ class MapModel(QObject):
     def select_current_flight(self):
         flight = self._selected_flight
         if flight is None:
+            self.selectedFlightChanged.emit(None)
             return None
         flight.set_selected(True)
+        self.selectedFlightChanged.emit(str(flight.flight.id))
 
     @staticmethod
     def leaflet_coord_for(point: Point, theater: ConflictTheater) -> LeafletLatLon:
@@ -249,23 +239,6 @@ class MapModel(QObject):
             self.game.blue.ato, blue=True
         ) | self._flights_in_ato(self.game.red.ato, blue=False)
         self.flightsChanged.emit()
-        self.reset_debug_zones()
-
-    def reset_debug_zones(self) -> None:
-        selected_flight = None
-        if self._selected_flight is not None:
-            selected_flight = self._selected_flight.flight
-        if selected_flight is None:
-            self._ip_zones = IpZonesJs.empty()
-            self._join_zones = JoinZonesJs.empty()
-            self._hold_zones = HoldZonesJs.empty()
-        else:
-            self._ip_zones = IpZonesJs.for_flight(selected_flight, self.game)
-            self._join_zones = JoinZonesJs.for_flight(selected_flight, self.game)
-            self._hold_zones = HoldZonesJs.for_flight(selected_flight, self.game)
-        self.ipZonesChanged.emit()
-        self.joinZonesChanged.emit()
-        self.holdZonesChanged.emit()
 
     @Property(list, notify=flightsChanged)
     def flights(self) -> list[FlightJs]:
@@ -397,20 +370,6 @@ class MapModel(QObject):
     def unculledZones(self) -> list[UnculledZone]:
         return self._unculled_zones
 
-    @Property(str, notify=ipZonesChanged)
-    def ipZones(self) -> str:
-        return json.dumps(self._ip_zones.dict(by_alias=True))
-
-    @Property(str, notify=joinZonesChanged)
-    def joinZones(self) -> str:
-        # Must be dumped as a string and deserialized in js because QWebChannel can't
-        # handle a dict. Can be cleaned up by switching from QWebChannel to FastAPI.
-        return json.dumps(self._join_zones.dict(by_alias=True))
-
-    @Property(str, notify=holdZonesChanged)
-    def holdZones(self) -> str:
-        return json.dumps(self._hold_zones.dict(by_alias=True))
-
     def reset_combats(self) -> None:
         self._air_combats = []
         self._sam_combats = []