Commit utils file

Author: RichDom2185

src/pages/leaderboard/subcomponents/leaderboardUtils.ts

@@ -0,0 +1,46 @@
+import { LoaderFunction, redirect, replace } from 'react-router';
+import { store } from 'src/pages/createStore';
+
+export const leaderboardLoader: LoaderFunction = ({ request, params }) => {
+  const baseUrl = `/courses/${params.courseId}`;
+  const { enableOverallLeaderboard, enableContestLeaderboard } = store.getState().session;
+  if (!enableOverallLeaderboard && !enableContestLeaderboard) {
+    return redirect(baseUrl + '/not_found');
+  }
+  // If if it a sub-path, pass through transparently
+  const path = new URL(request.url).pathname;
+  const rootRegex = new RegExp(`^${baseUrl}/leaderboard/?$`);
+  if (!rootRegex.test(path)) {
+    // Don't try to redirect subpaths, pass through and proceed
+    return null;
+  }
+  // Prefer showing overall
+  return enableOverallLeaderboard
+    ? replace(baseUrl + '/leaderboard/overall')
+    : replace(baseUrl + '/leaderboard/contests');
+};
+
+export const contestLeaderboardLoader: LoaderFunction = ({ request, params }) => {
+  const baseUrl = `/courses/${params.courseId}`;
+  const { enableContestLeaderboard } = store.getState().session;
+  if (!enableContestLeaderboard) {
+    return redirect(baseUrl + '/not_found');
+  }
+  const contests = store.getState().leaderboard.contests;
+  const fallback = contests.find(c => c.published);
+  if (!fallback) {
+    // No contests are ready to show scores yet
+    return redirect(baseUrl + '/not_found');
+  }
+  if (!params.contestId) {
+    // Fallback to default contest ID
+    // Prefer score leaderboard
+    return replace(`${baseUrl}/leaderboard/contests/${fallback.contest_id}/score`);
+  }
+  const leaderboardType = params.type!;
+  if (!['score', 'popularvote'].includes(leaderboardType)) {
+    return redirect(baseUrl + '/not_found');
+  }
+  // Pass through and proceed
+  return null;
+};