acceptable masses & speeds update

src/utils/vehicleLimitsUtils.ts

@@ -0,0 +1,20 @@
+import speedLimits from '../constants/speedLimits.json';
+import massLimits from '../constants/massLimits.json';
+
+export type SpeedLimitLocoType = keyof typeof speedLimits;
+export type MassLimitLocoType = keyof typeof massLimits;
+
+export function calculateSpeedLimit(locoType: SpeedLimitLocoType, stockMass: number, isTrainPassenger: boolean) {
+  const speedTable = speedLimits[locoType][isTrainPassenger ? 'passenger' : 'cargo'];
+
+  if (!speedTable) return undefined;
+
+  let speedLimit = 0;
+  for (const mass in speedTable) if (stockMass > Number(mass)) speedLimit = (speedTable as any)[mass];
+
+  return speedLimit;
+}
+
+export function calculateMassLimit(locoType: MassLimitLocoType, isTrainPassenger: boolean) {
+  return massLimits[locoType][isTrainPassenger ? 0 : 1] || 0;
+}