Add unit name -> Liberation object map.

Generated units are added to this during mission generation so we can
map destroyed units back to the data that generated them. Currently only
implemented for aircraft as a proof of concept.

game/operation/operation.py

@@ -34,6 +34,7 @@ from gen.triggergen import TRIGGER_RADIUS_MEDIUM, TriggersGenerator
 
 from .. import db
 from ..debriefing import Debriefing
+from ..unitmap import UnitMap
 
 if TYPE_CHECKING:
     from game import Game
@@ -59,6 +60,7 @@ class Operation:
     is_quick = None
     is_awacs_enabled = False
     ca_slots = 0
+    unit_map: UnitMap
 
     def __init__(self,
                  departure_cp: ControlPoint,
@@ -94,7 +96,7 @@ class Operation:
     def units_of(self, country_name: str) -> List[UnitType]:
         return []
 
-    def is_successfull(self, debriefing: Debriefing) -> bool:
+    def is_successful(self, debriefing: Debriefing) -> bool:
         return True
 
     @classmethod
@@ -177,6 +179,10 @@ class Operation:
                 gen.add_flight(flight)
             gen.generate()
 
+    @classmethod
+    def create_unit_map(cls) -> None:
+        cls.unit_map = UnitMap()
+
     @classmethod
     def create_radio_registries(cls) -> None:
         unique_map_frequencies = set()  # type: Set[RadioFrequency]
@@ -269,8 +275,9 @@ class Operation:
                     dead=True,
                 )
 
-    def generate(self):
+    def generate(self) -> UnitMap:
         """Build the final Mission to be exported"""
+        self.create_unit_map()
         self.create_radio_registries()
         # Set mission time and weather conditions.
         EnvironmentGenerator(self.current_mission,
@@ -323,6 +330,8 @@ class Operation:
             self.airgen
         )
 
+        return self.unit_map
+
     @classmethod
     def _generate_air_units(cls) -> None:
         """Generate the air units for the Operation"""
@@ -339,7 +348,7 @@ class Operation:
         # Generate Aircraft Activity on the map
         cls.airgen = AircraftConflictGenerator(
             cls.current_mission, cls.game.settings, cls.game,
-            cls.radio_registry)
+            cls.radio_registry, cls.unit_map)
 
         cls.airgen.generate_flights(
             cls.current_mission.country(cls.game.player_country),