chore: subtracting loco weight for "obc. lok." cell

src/mixins/useVehicleMixin.ts

@@ -0,0 +1,25 @@
+import { useApiStore } from '../stores/api.store';
+
+export function useVehicleMixin() {
+  const apiStore = useApiStore();
+
+  /**
+   * Gets loco load (obc. lok.) in tons - effectively train mass without locomotive or lone locomotive / unit mass
+   */
+  function getLocoLoad(trainMass: number, stockString: string) {
+    if (!apiStore.vehiclesData) return trainMass;
+
+    const stockArray = stockString.split(';');
+    const headUnitsNames = stockArray.slice(0, 3).filter((v) => /-\d{3,}$/.test(v));
+
+    if (headUnitsNames.length == 1 && stockArray.length == 1) return trainMass;
+
+    const headVehicleData = apiStore.vehiclesData.find((v) => v.name == headUnitsNames[0]);
+
+    if (!headVehicleData) return trainMass;
+
+    return Math.min(trainMass, trainMass - headVehicleData.group.weight);
+  }
+
+  return { getLocoLoad };
+}