feat: data driven latest archived season number

src/core/blitzkrieg/getArchivedLatestSeasonNumber.ts

@@ -0,0 +1,25 @@
+import { DATABASE_REPO } from './getArchivedRatingsMidnightLeaderboard';
+import { octokit } from './octokit';
+
+let cachedLatestArchivedSeasonNumber: number | null = null;
+
+export async function getArchivedLatestSeasonNumber() {
+  if (cachedLatestArchivedSeasonNumber) {
+    return cachedLatestArchivedSeasonNumber;
+  }
+
+  const { data } = await octokit.repos.getContent({
+    ...DATABASE_REPO,
+    path: 'com/ratings',
+  });
+
+  if (!Array.isArray(data)) {
+    throw new Error('Archived ratings data is malformed');
+  }
+
+  cachedLatestArchivedSeasonNumber = Math.max(
+    ...data.map(({ name }) => parseInt(name)),
+  );
+
+  return cachedLatestArchivedSeasonNumber;
+}