Introduce livery-sets on squadron level

Randomly chooses one of the liveries defined if present in the squadron's yaml, overrides entry for "livery" or whatever is chosen in the UI except liveries on flight-member level

changelog.md

@@ -5,6 +5,7 @@
 * **[Payload Editor]** Ability to configure liveries on flight/flight-member level
 * **[Factions]** Support for definitions in yml/yaml format
 * **[Campaigns/Factions]** Support for inline recommended faction in campaign's yaml file
+* **[Squadrons]** Ability to define a livery-set for each squadron from which Retribution will randomly choose during mission generation
 
 ## Fixes
 * **[UI/UX]** A-10A flights can be edited again.

game/campaignloader/squadrondefgenerator.py

@@ -47,6 +47,7 @@ class SquadronDefGenerator:
             role="Flying Squadron",
             aircraft=aircraft,
             livery=None,
+            livery_set=[],
             auto_assignable_mission_types=set(aircraft.iter_task_capabilities()),
             radio_presets={},
             operating_bases=OperatingBases.default_for_aircraft(aircraft),

game/missiongenerator/aircraft/aircraftpainter.py

@@ -27,7 +27,14 @@ class AircraftPainter:
     def livery_from_squadron(self) -> Optional[str]:
         return self.flight.squadron.livery
 
+    def livery_from_squadron_set(self) -> Optional[str]:
+        if not self.flight.squadron.livery_set:
+            return None
+        return random.choice(self.flight.squadron.livery_set)
+
     def determine_livery(self) -> Optional[str]:
+        if (livery := self.livery_from_squadron_set()) is not None:
+            return livery
         if (livery := self.livery_from_squadron()) is not None:
             return livery
         if (livery := self.livery_from_faction()) is not None:
@@ -37,8 +44,10 @@ class AircraftPainter:
         return None
 
     def apply_livery(self) -> None:
-        livery = self.determine_livery()
         for unit, member in zip(self.group.units, self.flight.iter_members()):
+            livery = self.determine_livery()
             if not (livery or member.livery):
                 continue
             unit.livery_id = member.livery if member.livery else livery
+            assert isinstance(unit.livery_id, str)
+            unit.livery_id = unit.livery_id.lower()

game/squadrons/squadron.py

@@ -40,6 +40,7 @@ class Squadron:
     aircraft: AircraftType
     max_size: int
     livery: Optional[str]
+    livery_set: list[str]  # will override livery if not empty
     primary_task: FlightType
     auto_assignable_mission_types: set[FlightType]
     radio_presets: dict[Union[str, int], list[RadioFrequency]]
@@ -503,6 +504,7 @@ class Squadron:
             squadron_def.aircraft,
             max_size,
             squadron_def.livery,
+            squadron_def.livery_set,
             primary_task,
             squadron_def.auto_assignable_mission_types,
             squadron_def.radio_presets,

game/squadrons/squadrondef.py

@@ -27,6 +27,7 @@ class SquadronDef:
     role: str
     aircraft: AircraftType
     livery: Optional[str]
+    livery_set: list[str]
     auto_assignable_mission_types: set[FlightType]
     radio_presets: dict[Union[str, int], list[RadioFrequency]]
     operating_bases: OperatingBases
@@ -103,6 +104,7 @@ class SquadronDef:
             role=data["role"],
             aircraft=unit_type,
             livery=data.get("livery"),
+            livery_set=data.get("livery_set", []),
             auto_assignable_mission_types=set(unit_type.iter_task_capabilities()),
             radio_presets=radio_presets,
             operating_bases=OperatingBases.from_yaml(unit_type, data.get("bases", {})),