refactor: moved file utils to composable mixin

src/composables/file.ts

@@ -0,0 +1,25 @@
+import { useStore } from '../store';
+
+export function getCurrentStockFileName() {
+  const store = useStore();
+
+  let fileName = '';
+
+  if (store.chosenStorageStockName.trim() != '') {
+    return store.chosenStorageStockName;
+  }
+
+  const currentStockString = store.stockList.map((s) => s.vehicleRef.type).join(';');
+
+  const currentRealComp = store.realCompositionList.find((rc) => rc.stockString == currentStockString);
+
+  // Append real composition to the name if chosen
+  if (currentRealComp != undefined) {
+    fileName += `${currentRealComp.stockId} `;
+  }
+
+  // Append default props
+  fileName += `${store.stockList[0].vehicleRef.type} ${(store.totalWeight / 1000).toFixed(1)}t; ${store.totalLength}m; vmax ${store.maxStockSpeed}`;
+
+  return fileName;
+}