1 files changed, 98 insertions, 0 deletions
diff --git a/web/gui/refresh-badges.js b/web/gui/refresh-badges.js
new file mode 100644
index 0000000..00dd4da
--- /dev/null
+++ b/web/gui/refresh-badges.js
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// ----------------------------------------------------------------------------
+// This script periodically updates all the netdata badges you have added to a
+// page as images. You don't need this script if you add the badges with
+// <embed src="..."/> - embedded badges auto-refresh by themselves.
+//
+// You can set the following variables before loading this script:
+
+/*global netdata_update_every        *//* number,   the time in seconds to update the badges
+ *                                                  (default: 15) */
+/*global netdata_live_callback       *//* function, callback to be called on each iteration while updating the badges
+ *                                                  (default: null) */
+/*global netdata_paused_callback     *//* function, callback to be called when the update pauses
+ *                                                  (default: null) */
+
+/*
+// EXAMPLE HTML PAGE:
+
+<html>
+<head>
+<script>
+// how frequently to update the badges?
+var netdata_update_every = 15;
+
+// show a count-down for badge refreshes
+var netdata_live_callback = function(secs, count) {
+    document.body.style.opacity = 1;
+    if(count)
+        document.getElementById("pageliveinfo").innerHTML =  "This page is live - updated <b>" + count + "</b> badges...";
+    else
+        document.getElementById("pageliveinfo").innerHTML =  "This page is live - badges will be updated in <b>" + secs + "</b> seconds...";
+};
+
+// show that we paused refreshes
+var netdata_paused_callback = function() {
+    document.body.style.opacity = 0.5;
+    document.getElementById("pageliveinfo").innerHTML =  "Refresh paused - the page does not have your focus";
+};
+</script>
+<script src="https://localhost:19999/refresh-badges.js"></script>
+
+</head>
+<body>
+<div id="pageliveinfo">Please wait... loading...</div>
+<img src="http://localhost:19999/api/v1/badge.svg?chart=system.cpu"/>
+</body>
+</html>
+
+*/
+
+if(typeof netdata_update_every === 'undefined')
+    netdata_update_every = 15;
+
+var netdata_was_live = false;
+var netdata_is_live = true;
+var netdata_loops = 0;
+
+function update_netdata_badges() {
+    netdata_loops++;
+    netdata_is_live = false;
+
+    var updated = 0;
+    var focus = document.hasFocus();
+
+    if(focus && netdata_loops >= netdata_update_every) {
+        var len = document.images.length;
+        while(len--) {
+            var url = document.images[len].src;
+            if(url.match(/\api\/v1\/badge\.svg/)) {
+                if(url.match(/\?/))
+                    url = url.replace(/&cacheBuster=\d*/, "") + "&cacheBuster=" + new Date().getTime().toString();
+                else
+                    url = url.replace(/\?cacheBuster=\d*/, "") + "?cacheBuster=" + new Date().getTime().toString();
+
+                document.images[len].src = url;
+                updated++;
+            }
+        }
+        netdata_loops = 0;
+    }
+
+    if(focus || updated)
+        netdata_is_live = true;
+
+    try {
+        if(netdata_is_live && typeof netdata_live_callback === 'function')
+            netdata_live_callback(netdata_update_every - netdata_loops, updated);
+        else if(netdata_was_live !== netdata_is_live && typeof netdata_paused_callback === 'function')
+            netdata_paused_callback();
+    }
+    catch(e) {
+        console.log(e);
+    }
+    netdata_was_live = netdata_is_live;
+
+    setTimeout(update_netdata_badges, 1000);
+}
+setTimeout(update_netdata_badges, 1000);