From e33077b752b7882d952de2b2a51170f3f31b440b Mon Sep 17 00:00:00 2001
From: apanizo <adolfo.panizo@gmail.com>
Date: Mon, 16 Apr 2018 14:44:09 +0200
Subject: [PATCH] WA-230 moving ensureOnce util function to singleton.js

---
 src/utils/singleton.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 src/utils/singleton.js

diff --git a/src/utils/singleton.js b/src/utils/singleton.js
new file mode 100644
index 00000000..5517a770
--- /dev/null
+++ b/src/utils/singleton.js
@@ -0,0 +1,14 @@
+// @flow
+export const ensureOnce = (fn: Function): Function => {
+  let executed = false
+  let response
+
+  return (...args) => {
+    if (executed) { return response }
+
+    executed = true
+    response = fn(args)
+
+    return response
+  }
+}