From f3f640c24f986f30f55864d6c3939bbdcd373a94 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gina=20H=C3=A4u=C3=9Fge?= <osd@foosel.net>
Date: Wed, 19 Nov 2014 09:16:37 +0100
Subject: [PATCH] On reconnect to server, check if the version changed and if
 so hard-reload the UI

---
 src/octoprint/static/js/app/dataupdater.js | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/octoprint/static/js/app/dataupdater.js b/src/octoprint/static/js/app/dataupdater.js
index 9a709017..60bae471 100644
--- a/src/octoprint/static/js/app/dataupdater.js
+++ b/src/octoprint/static/js/app/dataupdater.js
@@ -105,6 +105,7 @@ function DataUpdater(allViewModels) {
                         headers: {"X-Api-Key": UI_API_KEY}
                     });
 
+                    var oldVersion = VERSION;
                     VERSION = data["version"];
                     DISPLAY_VERSION = data["display_version"];
                     $("span.version").text(DISPLAY_VERSION);
@@ -122,6 +123,15 @@ function DataUpdater(allViewModels) {
                         }
                     }
 
+                    if (oldVersion != VERSION) {
+                        // version change detected, force reloading UI - use randomized delay to reduce server load in
+                        // the case of multiple clients
+                        var delay = Math.floor(Math.random() * 5) + 1;
+                        setTimeout(function() {location.reload(true);}, delay * 1000);
+
+                        // TODO notify about that, or show confirmation
+                    }
+
                     break;
                 }
                 case "history": {
@@ -175,7 +185,7 @@ function DataUpdater(allViewModels) {
                         new PNotify({title: gettext("Timelapse ready"), text: _.sprintf(gettext("New timelapse %(movie_basename)s is done rendering."), payload)});
                         timelapseViewModel.requestData();
                     } else if (type == "MovieFailed") {
-                        html = "<p>" + _.sprintf(gettext("Rendering of timelapse %(movie_basename)s failedwith return code %(returncode)s"), payload) + "</p>";
+                        html = "<p>" + _.sprintf(gettext("Rendering of timelapse %(movie_basename)s failed with return code %(returncode)s"), payload) + "</p>";
                         html += pnotifyAdditionalInfo('<pre style="overflow: auto">' + payload.error + '</pre>');
                         new PNotify({title: gettext("Rendering failed"), text: html, type: "error", hide: false});
                     } else if (type == "SlicingStarted") {