Merge faction sams and shorads into air_defenses.

Fixes https://github.com/Khopa/dcs_liberation/issues/473. Air defenses
for bases, strike locations, and fixed IADS will now all downgrade to
lower tier systems as needed. Strike locations will still be spawned as
an equally weighted random generator from either the medium or long
range groups, but will use a short range system if none are available to
the faction.

I've made the change in a way that leaves factions compatible, but will
follow up to clean up our built-in factions.

game/factions/faction.py

@@ -51,11 +51,8 @@ class Faction:
     # Logistics units used
     logistics_units: List[VehicleType] = field(default_factory=list)
 
-    # List of units that can be deployed as SHORAD
-    shorads: List[str] = field(default_factory=list)
-
     # Possible SAMS site generators for this faction
-    sams: List[str] = field(default_factory=list)
+    air_defenses: List[str] = field(default_factory=list)
 
     # Possible EWR generators for this faction.
     ewrs: List[str] = field(default_factory=list)
@@ -146,9 +143,14 @@ class Faction:
         faction.logistics_units = load_all_vehicles(
             json.get("logistics_units", []))
 
-        faction.sams = json.get("sams", [])
         faction.ewrs = json.get("ewrs", [])
-        faction.shorads = json.get("shorads", [])
+
+        faction.air_defenses = json.get("air_defenses", [])
+        # Compatibility for older factions. All air defenses now belong to a
+        # single group and the generator decides what belongs where.
+        faction.air_defenses.extend(json.get("sams", []))
+        faction.air_defenses.extend(json.get("shorads", []))
+
         faction.missiles = json.get("missiles", [])
         faction.requirements = json.get("requirements", {})
 

game/theater/start_generator.py

@@ -39,7 +39,6 @@ from gen.sam.airdefensegroupgenerator import AirDefenseRange
 from gen.sam.sam_group_generator import (
     generate_anti_air_group,
     generate_ewr_group,
-    generate_shorad_group,
 )
 from . import (
     ConflictTheater,
@@ -530,7 +529,8 @@ class BaseDefenseGenerator:
         g = SamGroundObject(namegen.random_objective_name(), group_id,
                             position, self.control_point, for_airbase=True)
 
-        group = generate_shorad_group(self.game, g, self.faction)
+        group = generate_anti_air_group(self.game, g, self.faction,
+                                        ranges=[{AirDefenseRange.Short}])
         if group is None:
             logging.error(
                 f"Could not generate SHORAD group at {self.control_point}")