Use host preparation for TURN connection settings

src/integrations/turnSettings.ts

@@ -0,0 +1,14 @@
+import type { P2PConnectionInfo } from "@vrtmrz/livesync-commonlib/compat/common/types";
+import { CLOUDFLARE_TURN_TYPE, validateCloudflareTurnConfiguration } from "./cloudflare/settings";
+
+/** Validate provider inputs without requesting credentials. */
+export function validateManagedTurnSettings(settings: Partial<P2PConnectionInfo>): string | undefined {
+    if (settings.P2P_managedType === undefined || settings.P2P_managedType === "") return undefined;
+    if (settings.P2P_managedType !== CLOUDFLARE_TURN_TYPE) {
+        return "The selected TURN configuration is not supported.";
+    }
+    return validateCloudflareTurnConfiguration({
+        turnKeyId: settings.P2P_managedId ?? "",
+        apiToken: settings.P2P_managedToken ?? "",
+    });
+}