From 3fb35e8123d3a8cd151571b315b7ec4d7e0875c7 Mon Sep 17 00:00:00 2001
From: Shpuld Shpuldson <shp@cock.li>
Date: Fri, 4 Sep 2020 11:19:53 +0300
Subject: rename to promiseInterval

---
 src/services/promise_interval/promise_interval.js | 28 +++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 src/services/promise_interval/promise_interval.js

(limited to 'src/services/promise_interval/promise_interval.js')

diff --git a/src/services/promise_interval/promise_interval.js b/src/services/promise_interval/promise_interval.js
new file mode 100644
index 00000000..ee46a236
--- /dev/null
+++ b/src/services/promise_interval/promise_interval.js
@@ -0,0 +1,28 @@
+
+// promiseInterval - replacement for setInterval for promises, starts counting
+// the interval only after a promise is done instead of immediately.
+// - promiseCall is a function that returns a promise, it's called the first
+// time after the first interval.
+// - interval is the interval delay in ms.
+
+export const promiseInterval = (promiseCall, interval) => {
+  let stopped = false
+  let timeout = null
+  let func = () => {}
+
+  func = () => {
+    promiseCall().finally(() => {
+      if (stopped) return
+      timeout = window.setTimeout(func, interval)
+    })
+  }
+
+  const stopFetcher = () => {
+    stopped = true
+    window.clearTimeout(timeout)
+  }
+
+  timeout = window.setTimeout(func, interval)
+
+  return { stop: stopFetcher }
+}
-- 
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