fix: no double fetch and caching

src/core/blitz/getRatingsLeague.ts

@@ -0,0 +1,23 @@
+import { LeagueTop } from '../../commands/ratings';
+import { Region } from '../../constants/regions';
+import { patientFetch } from '../blitzkrieg/patientFetch';
+import { withCORSProxy } from '../blitzkrieg/withCORSProxy';
+import regionToRegionSubdomain from './regionToRegionSubdomain';
+
+export async function getRatingsLeague(
+  region: Region,
+  league: number,
+  usePatientFetcher = false,
+) {
+  const fetcher = usePatientFetcher ? patientFetch : fetch;
+  const response = await fetcher(
+    withCORSProxy(
+      `https://${regionToRegionSubdomain(
+        region,
+      )}.wotblitz.com/en/api/rating-leaderboards/league/${league}/top/`,
+    ),
+  );
+  const json = (await response.json()) as LeagueTop;
+
+  return json;
+}