formatting for bytes

Signed-off-by: Jeff Carr <jcarr@wit.com>

helpers.go

@@ -115,3 +115,27 @@ func (c *Cluster) AddDroplet(uuid string, hostname string, cpus int, mem int) *D
 	c.Droplets = append(c.Droplets, d)
 	return d
 }
+
+func FormatBytes(b int64) string {
+	if b < 2000 {
+		return fmt.Sprintf("%d B", b)
+	}
+
+	kb := int(b / 1024)
+	if kb < 2000 {
+		return fmt.Sprintf("%d KB", kb)
+	}
+
+	mb := int(b / (1024 * 1024))
+	if mb < 2000 {
+		return fmt.Sprintf("%d MB", mb)
+	}
+
+	gb := int(b / (1024 * 1024 * 1024))
+	if gb < 2000 {
+		return fmt.Sprintf("%d GB", gb)
+	}
+
+	tb := int(b / (1024 * 1024 * 1024 * 1024))
+	return fmt.Sprintf("%d TB", tb)
+}