add back in admin requirement for earlier release

compendium-frontend/src/App.tsx

-import React, { ReactElement } from "react";
+import React, { ReactElement, useEffect } from "react";
 import { createBrowserRouter, RouterProvider } from "react-router-dom";
 import Landing from "./pages/Landing";
 import ExternalPageNavBar from "./shared/ExternalPageNavBar";
@@ -90,6 +90,26 @@ const router = createBrowserRouter([
 
 
 function App(): ReactElement {
+  const [isAdmin, setIsAdmin] = React.useState(false);
+
+  useEffect(() => {
+    // we have to do this because the user provider is not available before rendering other parts of the app
+    // so fetch the user and redirect if not admin as a temporary measure, until it's "generally available"
+    fetch('/api/user/').then(data => data.json()).then(user => {
+      setIsAdmin(user.permissions.admin)
+      if (!user.permissions.admin) {
+        window.location.replace('/survey')
+      } else {
+        console.log('Admin user, not redirecting')
+      }
+    }).catch(() => {
+      window.location.replace('/survey')
+    })
+  }, [])
+
+  if (!isAdmin) {
+    return <></>
+  }
   return (
     <div className="app">
       <Providers>