Add anti-ship missions.

The only practical difference between this and BAI is that the target is
floating, so this mostly shares its implementation with BAI.

Fixes https://github.com/Khopa/dcs_liberation/issues/350

changelog.md

@@ -3,6 +3,7 @@
 # Features/Improvements
 * **[Flight Planner]** Added fighter sweep missions.
 * **[Flight Planner]** Added BAI missions.
+* **[Flight Planner]** Added anti-ship missions.
 * **[Flight Planner]** Differentiated BARCAP and TARCAP. TARCAP is now for hostile areas and will arrive before the package.
 * **[Modding]** Possible to setup liveries overrides for factions
 

gen/flights/flightplan.py

@@ -629,7 +629,9 @@ class FlightPlanBuilder:
             custom_targets: Optional[List[Unit]]) -> FlightPlan:
         # TODO: Flesh out mission types.
         task = flight.flight_type
-        if task == FlightType.BAI:
+        if task == FlightType.ANTISHIP:
+            return self.generate_anti_ship(flight)
+        elif task == FlightType.BAI:
             return self.generate_bai(flight)
         elif task == FlightType.BARCAP:
             return self.generate_barcap(flight)
@@ -722,6 +724,31 @@ class FlightPlanBuilder:
 
         return self.strike_flightplan(flight, location, targets)
 
+    def generate_anti_ship(self, flight: Flight) -> StrikeFlightPlan:
+        """Generates an anti-ship flight plan.
+
+        Args:
+            flight: The flight to generate the flight plan for.
+        """
+        location = self.package.target
+
+        if isinstance(location, ControlPoint):
+            if location.is_fleet:
+                # The first group generated will be the carrier group itself.
+                location = location.ground_objects[0]
+            else:
+                raise InvalidObjectiveLocation(flight.flight_type, location)
+
+        if not isinstance(location, TheaterGroundObject):
+            raise InvalidObjectiveLocation(flight.flight_type, location)
+
+        targets: List[StrikeTarget] = []
+        for group in location.groups:
+            targets.append(
+                StrikeTarget(f"{group.name} at {location.name}", group))
+
+        return self.strike_flightplan(flight, location, targets)
+
     def generate_barcap(self, flight: Flight) -> BarCapFlightPlan:
         """Generate a BARCAP flight at a given location.
 
@@ -985,7 +1012,7 @@ class FlightPlanBuilder:
     @staticmethod
     def target_waypoint(flight: Flight, builder: WaypointBuilder,
                         target: StrikeTarget) -> FlightWaypoint:
-        if flight.flight_type == FlightType.BAI:
+        if flight.flight_type in {FlightType.ANTISHIP, FlightType.BAI}:
             return builder.bai_group(target)
         elif flight.flight_type == FlightType.DEAD:
             return builder.dead_point(target)
@@ -1097,7 +1124,7 @@ class FlightPlanBuilder:
         elif flight.flight_type is FlightType.DEAD:
             ingress = builder.ingress_dead(self.package.waypoints.ingress,
                                            location)
-        elif flight.flight_type is FlightType.BAI:
+        elif flight.flight_type in {FlightType.ANTISHIP, FlightType.BAI}:
             ingress = builder.ingress_bai(self.package.waypoints.ingress,
                                           location)
         else:

theater/controlpoint.py

@@ -255,9 +255,7 @@ class ControlPoint(MissionTarget):
                 ]
         else:
             if self.is_fleet:
-                yield from [
-                    # TODO: FlightType.ANTISHIP
-                ]
+                yield FlightType.ANTISHIP
             else:
                 yield from [
                     # TODO: FlightType.STRIKE

theater/theatergroundobject.py

@@ -156,7 +156,15 @@ class BuildingGroundObject(TheaterGroundObject):
         return f"{self.category}|{self.group_id}|{self.object_id}"
 
 
-class GenericCarrierGroundObject(TheaterGroundObject):
+class NavalGroundObject(TheaterGroundObject):
+    def mission_types(self, for_player: bool) -> Iterator[FlightType]:
+        from gen.flights.flight import FlightType
+        if not self.is_friendly(for_player):
+            yield FlightType.ANTISHIP
+        yield from super().mission_types(for_player)
+
+
+class GenericCarrierGroundObject(NavalGroundObject):
     pass
 
 
@@ -284,7 +292,7 @@ class EwrGroundObject(BaseDefenseGroundObject):
         return f"{self.faction_color}|{super().group_name}"
 
 
-class ShipGroundObject(TheaterGroundObject):
+class ShipGroundObject(NavalGroundObject):
     def __init__(self, name: str, group_id: int, position: Point,
                  control_point: ControlPoint) -> None:
         super().__init__(