update structure

ts/certificate/utils/certificate-helpers.ts

@@ -1,17 +1,18 @@
 import * as fs from 'fs';
 import * as path from 'path';
 import { fileURLToPath } from 'url';
+import type { Certificates } from '../models/certificate-types.js';
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
-export interface ICertificates {
-  privateKey: string;
-  publicKey: string;
-}
-
-export function loadDefaultCertificates(): ICertificates {
+/**
+ * Loads the default SSL certificates from the assets directory
+ * @returns The certificate key pair
+ */
+export function loadDefaultCertificates(): Certificates {
   try {
-    const certPath = path.join(__dirname, '..', 'assets', 'certs');
+    // Need to adjust path from /ts/certificate/utils to /assets/certs
+    const certPath = path.join(__dirname, '..', '..', '..', 'assets', 'certs');
     const privateKey = fs.readFileSync(path.join(certPath, 'key.pem'), 'utf8');
     const publicKey = fs.readFileSync(path.join(certPath, 'cert.pem'), 'utf8');
 
@@ -28,3 +29,22 @@ export function loadDefaultCertificates(): ICertificates {
     throw error;
   }
 }
+
+/**
+ * Checks if a certificate file exists at the specified path
+ * @param certPath Path to check for certificate
+ * @returns True if the certificate exists, false otherwise
+ */
+export function certificateExists(certPath: string): boolean {
+  return fs.existsSync(certPath);
+}
+
+/**
+ * Ensures the certificate directory exists
+ * @param dirPath Path to the certificate directory
+ */
+export function ensureCertificateDirectory(dirPath: string): void {
+  if (!fs.existsSync(dirPath)) {
+    fs.mkdirSync(dirPath, { recursive: true });
+  }
+}