Validate battle save item stock ids

src/game/scenes/BattleScene.ts

@@ -11350,7 +11350,12 @@ export class BattleScene extends Phaser.Scene {
       mapWidth: battleMap.width,
       mapHeight: battleMap.height,
       validUnitIds: new Set(battleUnits.map((unit) => unit.id)),
-      validUsableIds: new Set(Object.keys(usableCatalog))
+      validUsableIds: new Set(Object.keys(usableCatalog)),
+      validItemIds: new Set(
+        Object.values(usableCatalog)
+          .filter((usable) => usable.command === 'item')
+          .map((usable) => usable.id)
+      )
     });
   }
 

src/game/state/battleSaveState.ts

@@ -73,6 +73,7 @@ type BattleSaveValidationOptions = {
   mapHeight?: number;
   validUnitIds?: ReadonlySet<string>;
   validUsableIds?: ReadonlySet<string>;
+  validItemIds?: ReadonlySet<string>;
 };
 
 const unitDirections = new Set<UnitDirection>(['south', 'east', 'north', 'west']);
@@ -127,7 +128,7 @@ export function isValidBattleSaveState(state: unknown, options: BattleSaveValida
   }
 
   if (
-    !isOptionalNestedCountRecord(state.itemStocks, options) ||
+    !isOptionalItemStockRecord(state.itemStocks, options) ||
     !isOptionalBuffArray(state.battleBuffs, options) ||
     !isOptionalStatusArray(state.battleStatuses, options) ||
     !isOptionalStatsRecord(state.battleStats, options) ||
@@ -267,7 +268,7 @@ function isBondArray(value: unknown, options: BattleSaveValidationOptions) {
   );
 }
 
-function isOptionalNestedCountRecord(value: unknown, options: BattleSaveValidationOptions) {
+function isOptionalItemStockRecord(value: unknown, options: BattleSaveValidationOptions) {
   if (value === undefined) {
     return true;
   }
@@ -280,7 +281,10 @@ function isOptionalNestedCountRecord(value: unknown, options: BattleSaveValidati
     ([unitId, stocks]) =>
       isKnownUnitId(unitId, options) &&
       isRecord(stocks) &&
-      Object.values(stocks).every((count) => Number.isInteger(count) && Number(count) >= 0)
+      Object.entries(stocks).every(
+        ([itemId, count]) =>
+          (!options.validItemIds || options.validItemIds.has(itemId)) && Number.isInteger(count) && Number(count) >= 0
+      )
   );
 }