kubeconfig-manager.ts fixes / refactoring

Signed-off-by: Roman <ixrock@gmail.com>

src/common/utils/randomFileName.ts

@@ -1,5 +1,6 @@
-// Creates system valid random filename
+// Create random filename
 
-export function randomFileName(name: string) {
-  return `${Math.random().toString(36).substring(2, 15)}-${Math.random().toString(36).substring(2, 15)}-${name}`
+export function randomFileName({ prefix = "", suffix = "", sep = "__" } = {}) {
+  const randId = () => Math.random().toString(16).substr(2);
+  return [prefix, randId(), suffix].filter(s => s).join(sep);
 }