feat: start of monorepo

packages/website/src/hooks/useAdExempt.ts

@@ -0,0 +1,36 @@
+import { useLayoutEffect, useState } from 'react';
+import * as App from '../stores/app';
+
+let cache: Record<string, boolean | Promise<boolean>> = {};
+
+export function useAdExempt() {
+  const patreon = App.use((state) => state.logins.patreon);
+  const [exempt, setExempt] = useState(false);
+
+  useLayoutEffect(() => {
+    (async () => {
+      if (!patreon) return setExempt(false);
+
+      if (!(patreon.token in cache)) {
+        cache[patreon.token] = new Promise<boolean>(async (resolve) => {
+          const response = await fetch(
+            `/api/patreon/membership/${patreon.token}`,
+            { cache: 'force-cache' },
+          );
+
+          if (!response.ok) return resolve(false);
+
+          const json = await response.json();
+          const exempt = typeof json === 'boolean' && json;
+
+          cache[patreon.token] = exempt;
+          resolve(exempt);
+        });
+      }
+
+      setExempt(await cache[patreon.token]);
+    })();
+  }, []);
+
+  return exempt;
+}