snapshot of https://github.com/shadcn-ui/ui.git (main, 2026-09-15; blobs > 131072B omitted)

packages/shadcn/test/fixtures/frameworks/remix-indie-stack/app/utils.ts

@@ -0,0 +1,76 @@
+import { useMatches } from "@remix-run/react";
+import { useMemo } from "react";
+
+import type { User } from "~/models/user.server";
+
+const DEFAULT_REDIRECT = "/";
+
+/**
+ * This should be used any time the redirect path is user-provided
+ * (Like the query string on our login/signup pages). This avoids
+ * open-redirect vulnerabilities.
+ * @param {string} to The redirect destination
+ * @param {string} defaultRedirect The redirect to use if the to is unsafe.
+ */
+export function safeRedirect(
+  to: FormDataEntryValue | string | null | undefined,
+  defaultRedirect: string = DEFAULT_REDIRECT,
+) {
+  if (!to || typeof to !== "string") {
+    return defaultRedirect;
+  }
+
+  if (!to.startsWith("/") || to.startsWith("//")) {
+    return defaultRedirect;
+  }
+
+  return to;
+}
+
+/**
+ * This base hook is used in other hooks to quickly search for specific data
+ * across all loader data using useMatches.
+ * @param {string} id The route id
+ * @returns {JSON|undefined} The router data or undefined if not found
+ */
+export function useMatchesData(
+  id: string,
+): Record<string, unknown> | undefined {
+  const matchingRoutes = useMatches();
+  const route = useMemo(
+    () => matchingRoutes.find((route) => route.id === id),
+    [matchingRoutes, id],
+  );
+  return route?.data as Record<string, unknown>;
+}
+
+function isUser(user: unknown): user is User {
+  return (
+    user != null &&
+    typeof user === "object" &&
+    "email" in user &&
+    typeof user.email === "string"
+  );
+}
+
+export function useOptionalUser(): User | undefined {
+  const data = useMatchesData("root");
+  if (!data || !isUser(data.user)) {
+    return undefined;
+  }
+  return data.user;
+}
+
+export function useUser(): User {
+  const maybeUser = useOptionalUser();
+  if (!maybeUser) {
+    throw new Error(
+      "No user found in root loader, but user is required by useUser. If user is optional, try useOptionalUser instead.",
+    );
+  }
+  return maybeUser;
+}
+
+export function validateEmail(email: unknown): email is string {
+  return typeof email === "string" && email.length > 3 && email.includes("@");
+}