Einstellungen von Header nach Einstellungsseite ausgelagert

components/main/settingsPageComponents/hooks/useAdminAuth.ts

@@ -0,0 +1,49 @@
+// components/main/settingsPageComponents/hooks/useAdminAuth.ts
+import { useState, useEffect } from "react";
+import CryptoJS from "crypto-js";
+
+function decryptToken(encryptedToken: string) {
+  const encryptionKey = process.env.NEXT_PUBLIC_ENCRYPTION_KEY;
+  const encryptionIV = process.env.NEXT_PUBLIC_ENCRYPTION_IV;
+
+  if (!encryptionKey || !encryptionIV) {
+    throw new Error("Encryption key or IV is not defined.");
+  }
+
+  const key = CryptoJS.enc.Utf8.parse(encryptionKey);
+  const iv = CryptoJS.enc.Utf8.parse(encryptionIV);
+
+  const bytes = CryptoJS.AES.decrypt(encryptedToken, key, { iv });
+  return JSON.parse(bytes.toString(CryptoJS.enc.Utf8));
+}
+
+export function useAdminAuth(showModal: boolean) {
+  const [isAdminLoggedIn, setAdminLoggedIn] = useState(false);
+
+  function logoutAdmin() {
+    sessionStorage.removeItem("token");
+    localStorage.setItem("isAdminLoggedIn", "false");
+    setAdminLoggedIn(false);
+  }
+
+  useEffect(() => {
+    if (showModal) {
+      const token = sessionStorage.getItem("token");
+      if (token) {
+        try {
+          const { exp } = decryptToken(token);
+          if (Date.now() < exp) {
+            setAdminLoggedIn(true);
+          } else {
+            logoutAdmin();
+          }
+        } catch (error) {
+          console.error("Token-Entschlüsselung fehlgeschlagen:", error);
+          logoutAdmin();
+        }
+      }
+    }
+  }, [showModal]);
+
+  return { isAdminLoggedIn, logoutAdmin };
+}