Validate enemy usable save keys

src/game/scenes/BattleScene.ts

@@ -11349,7 +11349,8 @@ export class BattleScene extends Phaser.Scene {
       expectedBattleId: battleScenario.id,
       mapWidth: battleMap.width,
       mapHeight: battleMap.height,
-      validUnitIds: new Set(battleUnits.map((unit) => unit.id))
+      validUnitIds: new Set(battleUnits.map((unit) => unit.id)),
+      validUsableIds: new Set(Object.keys(usableCatalog))
     });
   }
 

src/game/state/battleSaveState.ts

@@ -72,6 +72,7 @@ type BattleSaveValidationOptions = {
   mapWidth?: number;
   mapHeight?: number;
   validUnitIds?: ReadonlySet<string>;
+  validUsableIds?: ReadonlySet<string>;
 };
 
 const unitDirections = new Set<UnitDirection>(['south', 'east', 'north', 'west']);
@@ -130,7 +131,7 @@ export function isValidBattleSaveState(state: unknown, options: BattleSaveValida
     !isOptionalBuffArray(state.battleBuffs, options) ||
     !isOptionalStatusArray(state.battleStatuses, options) ||
     !isOptionalStatsRecord(state.battleStats, options) ||
-    !isOptionalStringArray(state.enemyUsableUseKeys) ||
+    !isOptionalEnemyUsableUseKeyArray(state.enemyUsableUseKeys, state.battleId, options) ||
     !isOptionalStringArray(state.triggeredBattleEvents)
   ) {
     return false;
@@ -339,6 +340,28 @@ function isOptionalStatsRecord(value: unknown, options: BattleSaveValidationOpti
   );
 }
 
+function isOptionalEnemyUsableUseKeyArray(value: unknown, battleId: string, options: BattleSaveValidationOptions) {
+  return value === undefined || (Array.isArray(value) && value.every((entry) => isEnemyUsableUseKey(entry, battleId, options)));
+}
+
+function isEnemyUsableUseKey(value: unknown, battleId: string, options: BattleSaveValidationOptions) {
+  if (typeof value !== 'string') {
+    return false;
+  }
+
+  const [entryBattleId, unitId, usableId, extra] = value.split(':');
+  return (
+    extra === undefined &&
+    entryBattleId === battleId &&
+    typeof unitId === 'string' &&
+    unitId.length > 0 &&
+    typeof usableId === 'string' &&
+    usableId.length > 0 &&
+    isKnownUnitId(unitId, options) &&
+    (!options.validUsableIds || options.validUsableIds.has(usableId))
+  );
+}
+
 function isKnownUnitId(unitId: string, options: BattleSaveValidationOptions) {
   return !options.validUnitIds || options.validUnitIds.has(unitId);
 }