Add type checking.

utils/checkRecords.js

@@ -1,14 +1,15 @@
-const { checkIfValidIP, checkIfValidFQDN, checkInvalidDomain } =  require('./utils.js');
+const { checkIfValidIP, checkIfValidFQDN, checkInvalidDomain, isString } =  require('./utils.js');
 
 function checkRecords(data) {
     const recordType = Object.keys(data.target)[0];
-
+    const value = data.target[recordType].value;
     // Check if the domain is invalid
     if (checkInvalidDomain(data.target[recordType].name) === true) return false;
 
     // Check A record
     if (recordType.toLowerCase() === 'a') {
-        for (const record of data.target[recordType].value) {
+        if (!Array.isArray(value)) return false;
+        for (const record of value) {
             if (checkIfValidIP(record) == false) return false;
         }
         return true;
@@ -16,7 +17,8 @@ function checkRecords(data) {
 
     // Check CNAME record
     if (recordType.toLowerCase() === 'cname') {
-        return checkIfValidFQDN(data.target[recordType].value);
+        if (!isString(value)) return false;
+        return checkIfValidFQDN(value);
     }
 
     return false;