feat: add session expiry (#951)

apps/nextjs/src/app/[locale]/_client-providers/session.tsx

@@ -1,14 +1,27 @@
 "use client";
 
 import type { PropsWithChildren } from "react";
+import { useEffect } from "react";
+import dayjs from "dayjs";
 
 import type { Session } from "@homarr/auth";
-import { SessionProvider } from "@homarr/auth/client";
+import { SessionProvider, signIn } from "@homarr/auth/client";
 
 interface AuthProviderProps {
   session: Session | null;
 }
 
 export const AuthProvider = ({ children, session }: PropsWithChildren<AuthProviderProps>) => {
+  useLoginRedirectOnSessionExpiry(session);
   return <SessionProvider session={session}>{children}</SessionProvider>;
 };
+
+const useLoginRedirectOnSessionExpiry = (session: Session | null) => {
+  useEffect(() => {
+    // eslint-disable-next-line @typescript-eslint/no-empty-function
+    if (!session) return () => {};
+    //setTimeout doesn't allow for a number higher than 2147483647 (2³¹-1 , or roughly 24 days)
+    const timeout = setTimeout(() => void signIn(), Math.min(dayjs(session.expires).diff(), 2147483647));
+    return () => clearTimeout(timeout);
+  }, [session]);
+};