Moved validator to shared code directory.

server/shared/utils/strings.ts

@@ -0,0 +1,27 @@
+import {isString, MAC} from "../types";
+
+export function normalizeString(str: string): string {
+    return isString(str) ? str.trim().replace(/\s+/g, ' ') : str;
+}
+
+export function normalizeMac(mac: MAC): MAC {
+    // parts only contains values at odd indexes
+    const parts = mac.toUpperCase().replace(/[-:]/g, '').split(/([A-F0-9]{2})/);
+
+    const macParts = [];
+
+    for (let i = 1; i < parts.length; i += 2) {
+        macParts.push(parts[i]);
+    }
+
+    return macParts.join(':') as MAC;
+}
+
+export function parseInteger(str: string): number {
+    const parsed = parseInt(str, 10);
+    if (parsed.toString() === str) {
+        return parsed;
+    } else {
+        throw new SyntaxError(`String does not represent a valid integer: "${str}"`);
+    }
+}