From 0bbe22dd69bbb149e9fed74c87e7fc75e181483e Mon Sep 17 00:00:00 2001
From: James Barnett <noreply@jamesbarnett.xyz>
Date: Sat, 7 Apr 2018 23:22:58 +0100
Subject: Try to re-establish lost websocket connections

---
 public/javascripts/dash.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'public/javascripts/dash.js')

diff --git a/public/javascripts/dash.js b/public/javascripts/dash.js
index 7a8207c..e3f39a9 100644
--- a/public/javascripts/dash.js
+++ b/public/javascripts/dash.js
@@ -26,6 +26,7 @@ var dash = {
     var ws = new WebSocket(wsUri);
     ws.onopen = function () {
       console.log('Websocket connection established');
+      $('#connection-error').hide(200);
       ws.send(JSON.stringify(
         {
           requestType: 'getCachedData',
@@ -33,7 +34,14 @@ var dash = {
         }
       ));
     }
-    ws.onmessage = this.wsMessageHandler;
+    ws.onmessage = dash.wsMessageHandler;
+
+    ws.onclose = function() {
+      // Usually caused by mobile devices going to sleep or the user minimising the browser app.
+      // The setTimeout will begin once the device wakes from sleep or the browser regains focus.
+      $('#connection-error').show();
+      setTimeout(dash.initWsConnection, 2000);
+    }
   },
 
   wsMessageHandler: function(messageEvent) {
-- 
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