Update utils.js

utils/utils.js

@@ -1,19 +1,52 @@
 const invalidDomains = require('./invalid-domains.json');
+const fs = require('fs');
 
-module.exports.checkIfValidIP = function(str) {
+function getFiles(path) {
+  //get all files in path, returns arr
+  const allFiles = fs.readdirSync(path);
+  
+  return allFiles
+}
+
+function getFileExtension(filename) {
+  //get file ext
+  return (/[.]/.exec(filename)) ? /[^.]+$/.exec(filename) : undefined;
+}
+
+function stripExt(filename) {
+  //remove file ext
+  return filename.substr(0, filename.lastIndexOf('.'))
+}
+
+function checkIfValidIP(str) {
   // Check if the IP address is valid
   const regexExp = /^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/gi;
 
   return regexExp.test(str);
 }
 
-module.exports.checkIfValidFQDN = function(str) {
+function checkIfValidFQDN(str) {
   // Check if the FQDN is valid
   const regexExp = /(?=^.{4,253}$)(^((?!-)[a-zA-Z0-9-]{0,62}[a-zA-Z0-9]\.)+[a-zA-Z]{2,63}$)/gi;
 
   return regexExp.test(str);
 }
 
-module.exports.checkInvalidDomain = function(str) {
-  return invalidDomains.includes(str);
+function checkInvalidDomain(str) {
+  //check invalid domains
+  if (invalidDomains.includes(str)) return true;
+  //check reserved domains
+  const files = getFiles("./reserved/").map(file => stripExt(file));
+  if (files.includes(str)) return true;
+  
+  return false;
+}
+
+module.exports = { 
+  checkInvalidDomain, 
+  checkIfValidFQDN, 
+  checkIfValidIP,
+  stripExt,
+  getFileExtension, 
+  getFiles 
 }