[refactor] Moved isValidIPAddress to its own TS file

utils/helpers/isValidIPAddress.ts

@@ -0,0 +1,12 @@
+
+/**
+ * Checks whether a IP Address string is valid.
+ * @param ipaddress A string representing a potential IP Address
+ */
+export function isValidIPAddress(ipaddress: string) {
+    const byteRange: string = "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)";
+    const regexStr: string = `^${byteRange}\.${byteRange}\.${byteRange}\.${byteRange}$`;
+    const ipAddressRegex: RegExp = new RegExp(regexStr);
+
+    return ipAddressRegex.test(ipaddress);
+}