Merge branch 'main' into dev-rinth

src/hooks/useEccentricity.ts

@@ -0,0 +1,35 @@
+import { sumBy } from 'lodash';
+import { use, useMemo } from 'react';
+import {
+  TankDefinition,
+  tankDefinitions,
+} from '../core/blitzkrieg/tankDefinitions';
+import { useDuel } from '../stores/duel';
+
+export enum UseEccentricityMode {
+  Tier,
+  Class,
+}
+
+export function useEccentricity(mode: UseEccentricityMode) {
+  const awaitedTankDefinitions = use(tankDefinitions);
+  const tank = useDuel((state) => state.protagonist!.tank);
+  const similarTanks = useMemo(
+    () =>
+      Object.values(awaitedTankDefinitions).filter(
+        (tankB) =>
+          tank.tier === tankB.tier &&
+          (mode === UseEccentricityMode.Class
+            ? tank.class === tankB.class
+            : true),
+      ),
+    [tank.id],
+  );
+
+  function eccentricity(property: (tank: TankDefinition) => number) {
+    const average = sumBy(similarTanks, property) / similarTanks.length;
+    return property(tank) / average;
+  }
+
+  return eccentricity;
+}