adding app v2 (#943)

www/appv2/server/auth.ts

@@ -0,0 +1,28 @@
+/**
+ * Auth constants and helpers — ported from Next.js app/lib/auth.ts
+ */
+
+export const REFRESH_ACCESS_TOKEN_ERROR = "RefreshAccessTokenError" as const;
+// 4 min is 1 min less than default authentik value.
+// Assumes authentik won't be set to access tokens < 4 min
+export const REFRESH_ACCESS_TOKEN_BEFORE = 4 * 60 * 1000;
+
+export const shouldRefreshToken = (accessTokenExpires: number): boolean => {
+  const timeLeft = accessTokenExpires - Date.now();
+  return timeLeft < REFRESH_ACCESS_TOKEN_BEFORE;
+};
+
+export const LOGIN_REQUIRED_PAGES = [
+  "/transcripts/[!new]",
+  "/browse(.*)",
+  "/rooms(.*)",
+];
+
+export const PROTECTED_PAGES = new RegExp(
+  LOGIN_REQUIRED_PAGES.map((page) => `^${page}$`).join("|"),
+);
+
+export function getLogoutRedirectUrl(pathname: string): string {
+  const transcriptPagePattern = /^\/transcripts\/[^/]+$/;
+  return transcriptPagePattern.test(pathname) ? pathname : "/";
+}