- npm updates

- renamed 'models' and 'validators' folders
- removed unneccessary files in contracts folder

app/utils/utility-functions.ts

@@ -0,0 +1,26 @@
+export function sum(a: number, b: number): number {
+    return a + b;
+}
+
+export function getDomain(host: string): string {
+    // $myhost = strtolower(trim($host));
+    let myHost: string = host.trim().toLocaleLowerCase();
+    // $count = substr_count($myhost, '.');
+    const count: number = myHost.split(',').length - 1;
+
+    if (count == 2) {
+        const words = myHost.split('.');
+        if (words[1].length > 3) {
+            myHost = myHost.split('.', 2)[1];
+        }
+    } else if (count > 2) {
+        myHost = getDomain(myHost.split('.', 2)[1]);
+    }
+    myHost = myHost.replace(new RegExp(/^.*:\/\//i, 'g'), '');
+    return myHost;
+}
+
+export function preg_match(regex: RegExp, str: string) {
+    const result: boolean = regex.test(str);
+    return result;
+}