From ec7ef6ef1e415981184088fa98cda04931fa95c9 Mon Sep 17 00:00:00 2001
From: Matthias <matthias.mair@oewf.org>
Date: Tue, 30 Nov 2021 17:45:56 +0100
Subject: [PATCH] reduce needed cyle when idleing

---
 .../static/script/inventree/inventree.js        | 12 +++++++-----
 .../static/script/inventree/notification.js     | 17 +++++++++++++++++
 2 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/InvenTree/InvenTree/static/script/inventree/inventree.js b/InvenTree/InvenTree/static/script/inventree/inventree.js
index dd9a725fa1..0e7c09c32d 100644
--- a/InvenTree/InvenTree/static/script/inventree/inventree.js
+++ b/InvenTree/InvenTree/static/script/inventree/inventree.js
@@ -218,12 +218,14 @@ function inventreeDocReady() {
     // Display any cached alert messages
     showCachedAlerts();
 
-    // Start notification background worker to check every 1 seconds if notifications are available
-    setInterval(notificationCheck, 1000);
+    // always refresh when the focus returns
+    $(document).focus(function(){
+        startNotificationWatcher();
+    });
 
-    // also run when the focus returns
-    $(document).on('focus', function(e){
-        notificationCheck(force = true);
+    // kill notification watcher if focus is lost -> respect your users cycles
+    $(document).focusout(function(){
+        stopNotificationWatcher();
     });
 
     $('#offcanvasRight').on('show.bs.offcanvas', openNotificationPanel)  // listener for opening the notification panel
diff --git a/InvenTree/InvenTree/static/script/inventree/notification.js b/InvenTree/InvenTree/static/script/inventree/notification.js
index c5020169d6..4fc9b0ac77 100644
--- a/InvenTree/InvenTree/static/script/inventree/notification.js
+++ b/InvenTree/InvenTree/static/script/inventree/notification.js
@@ -119,6 +119,23 @@ function showMessage(message, options={}) {
     });
 }
 
+var notificationWatcher = null;  // reference for the notificationWatcher
+/**
+ * start the regular notification checks
+ **/
+function startNotificationWatcher() {
+    notificationCheck(force=true);
+    notificationWatcher = setInterval(notificationCheck, 1000);
+}
+
+/**
+ * stop the regular notification checks
+ **/
+function stopNotificationWatcher() {
+    clearInterval(notificationWatcher);
+}
+
+
 var notificationUpdateTic = 0;
 /**
  * The notification checker is initiated when the document is loaded. It checks if there are unread notifications