core rework

frontend/src/utils.ts

@@ -0,0 +1,9 @@
+export function validateIP(ipAddr: string): boolean {
+    let ipRegex = /^(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)(?:\.(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)){3}$/gm
+    return ipRegex.test(ipAddr)
+}
+
+export function validateDomain(domainName: string): boolean {
+    let domainRegex = /[^@ \t\r\n]+.[^@ \t\r\n]+\.[^@ \t\r\n]+/
+    return domainRegex.test(domainName) || domainName === 'localhost'
+}