simplify

src/custom-resouces/generate-secret/generate-secret.utils.ts

@@ -0,0 +1,69 @@
+import * as crypto from 'crypto';
+
+import type { GenerateSecretField, GenerateSecretSpec } from './generate-secret.schemas.ts';
+
+const generateRandomString = (length: number, encoding: GenerateSecretField['encoding']): string => {
+  let byteLength = 0;
+  switch (encoding) {
+    case 'base64':
+    case 'base64url':
+      // Base64 uses 4 characters for every 3 bytes, so we'll generate slightly more bytes
+      // than the final length to ensure we can get a string of at least the required length.
+      byteLength = Math.ceil((length * 3) / 4);
+      break;
+    case 'hex':
+      byteLength = Math.ceil(length / 2);
+      break;
+    case 'numeric':
+    case 'utf8':
+      byteLength = length;
+      break;
+  }
+
+  const randomBytes = crypto.randomBytes(byteLength);
+
+  let resultString = '';
+
+  switch (encoding) {
+    case 'base64':
+      resultString = randomBytes.toString('base64');
+      break;
+    case 'base64url':
+      resultString = randomBytes.toString('base64url');
+      break;
+    case 'hex':
+      resultString = randomBytes.toString('hex');
+      break;
+    case 'numeric':
+      resultString = Array.from(randomBytes)
+        .map((b) => (b % 10).toString()) // Get a single digit from each byte
+        .join('');
+      break;
+    case 'utf8':
+      resultString = randomBytes.toString('utf8');
+      break;
+  }
+
+  return resultString.slice(0, length);
+};
+
+const generateSecrets = (spec: GenerateSecretSpec): Record<string, string> => {
+  const secrets: Record<string, string> = {};
+
+  for (const field of spec.fields) {
+    if (field.value !== undefined) {
+      // If a value is provided, use it directly.
+      secrets[field.name] = field.value;
+    } else {
+      // Generate a new secret based on the specification.
+      // Use default values if encoding or length are not provided.
+      const encoding = field.encoding || 'base64url';
+      const length = field.length || 32;
+      secrets[field.name] = generateRandomString(length, encoding);
+    }
+  }
+
+  return secrets;
+};
+
+export { generateRandomString, generateSecrets };