From cd4eec115b42dd75e9f8a3eb63b837046c4154f5 Mon Sep 17 00:00:00 2001
From: Patrizio Bekerle <patrizio.bekerle@tugraz.at>
Date: Mon, 21 Oct 2019 12:04:36 +0200
Subject: [PATCH] Add function pollFunc
---
packages/common/utils.js | 26 +++++++++++++++++++++++++-
1 file changed, 25 insertions(+), 1 deletion(-)
diff --git a/packages/common/utils.js b/packages/common/utils.js
index e4bae26b..99624b4d 100644
--- a/packages/common/utils.js
+++ b/packages/common/utils.js
@@ -225,4 +225,28 @@ export const getAssetURL = (path) => {
// If all fails we just fall back to relative paths and hope the
// html is on the same path as the bundle
return path;
-};
\ No newline at end of file
+};
+
+/**
+ * Poll <fn> every <interval> ms until <timeout> ms
+ *
+ * @param fn
+ * @param timeout
+ * @param interval
+ */
+export const pollFunc = (fn, timeout, interval) => {
+ var startTime = (new Date()).getTime();
+ interval = interval || 1000;
+
+ (function p() {
+ // don't retry if we took longer than timeout ms
+ if (((new Date).getTime() - startTime ) > timeout) {
+ return;
+ }
+
+ // retry until fn() returns true
+ if (!fn()) {
+ setTimeout(p, interval);
+ }
+ })();
+};
--
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