Some code cleanup, add jest coverage and begin using it for utility functions

resources/scripts/lib/formatters.ts

@@ -0,0 +1,35 @@
+const _CONVERSION_UNIT = 1000;
+
+/**
+ * Given a value in megabytes converts it back down into bytes.
+ */
+function mbToBytes (megabytes: number): number {
+    return Math.floor(megabytes * _CONVERSION_UNIT * _CONVERSION_UNIT);
+}
+
+/**
+ * Given an amount of bytes, converts them into a human readable string format
+ * using "1000" as the divisor.
+ */
+function bytesToString (bytes: number): string {
+    if (bytes < 1) return '0 Bytes';
+
+    const i = Math.floor(Math.log(bytes) / Math.log(_CONVERSION_UNIT));
+    const value = Number((bytes / Math.pow(_CONVERSION_UNIT, i)).toFixed(2));
+
+    return `${value} ${[ 'Bytes', 'KB', 'MB', 'GB', 'TB' ][i]}`;
+}
+
+/**
+ * Formats an IPv4 or IPv6 address.
+ */
+function ip (value: string): string {
+    // noinspection RegExpSimplifiable
+    return /([a-f0-9:]+:+)+[a-f0-9]+/.test(value) ? `[${value}]` : value;
+}
+
+export {
+    ip,
+    mbToBytes,
+    bytesToString,
+};