feat: add crawling settings (#959)

Co-authored-by: Meier Lukas <meierschlumpf@gmail.com>

apps/nextjs/src/components/layout/search-engine-optimization.tsx

@@ -0,0 +1,33 @@
+import SuperJSON from "superjson";
+
+import { db, eq } from "@homarr/db";
+import { serverSettings } from "@homarr/db/schema/sqlite";
+import type { defaultServerSettings } from "@homarr/server-settings";
+
+export const SearchEngineOptimization = async () => {
+  const crawlingAndIndexingSetting = await db.query.serverSettings.findFirst({
+    where: eq(serverSettings.settingKey, "crawlingAndIndexing"),
+  });
+
+  if (!crawlingAndIndexingSetting) {
+    return null;
+  }
+
+  const value = SuperJSON.parse<(typeof defaultServerSettings)["crawlingAndIndexing"]>(
+    crawlingAndIndexingSetting.value,
+  );
+
+  const robotsAttributes = [...(value.noIndex ? ["noindex"] : []), ...(value.noIndex ? ["nofollow"] : [])];
+
+  const googleAttributes = [
+    ...(value.noSiteLinksSearchBox ? ["nositelinkssearchbox"] : []),
+    ...(value.noTranslate ? ["notranslate"] : []),
+  ];
+
+  return (
+    <>
+      <meta name="robots" content={robotsAttributes.join(",")} />
+      <meta name="google" content={googleAttributes.join(",")} />
+    </>
+  );
+};