From 22b8426a18f64b819d99da03acbfcfdc342f91d5 Mon Sep 17 00:00:00 2001
From: Matthias Wirth <matthias.wirth@gmail.com>
Date: Sun, 20 Dec 2020 19:05:05 +0100
Subject: [PATCH] limit refreshes on switching tabs, fix http error status
 display

---
 html/index.html |  5 ++---
 html/script.js  | 15 ++++++++++-----
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/html/index.html b/html/index.html
index 3a55900..4fa6129 100644
--- a/html/index.html
+++ b/html/index.html
@@ -878,9 +878,8 @@
     </div> <!-- layout_container -->
 
     <div id="update_error" class="hidden error_box">
-      <b>Problem fetching data from the server!</b><br>
-      <span id="update_error_detail"></span><br>
-      The displayed map data will be out of date.
+      Problem fetching data from the server:<br>
+      <span id="update_error_detail"></span>
     </div>
 
     <div id="generic_error" class="hidden error_box">
diff --git a/html/script.js b/html/script.js
index e9482fd..dec10ad 100644
--- a/html/script.js
+++ b/html/script.js
@@ -57,6 +57,7 @@ let noMLAT = false;
 let noVanish = false;
 let filterTracks = false;
 let refreshId = 0;
+let lastFetch = 0;
 let refreshMultiplier = 1;
 let globeIndexGrid = 0;
 let globeIndexNow = {};
@@ -256,6 +257,11 @@ function fetchData() {
         return;
     fetchSoon();
     //console.log("fetch");
+    let currentTime = new Date().getTime();
+    if (currentTime - lastFetch < refreshInt()) {
+        return;
+    }
+    lastFetch = currentTime;
     if (showTrace)
         return;
     if (pendingFetches > 0)
@@ -398,11 +404,10 @@ function fetchData() {
         });
 
         req.fail(function(jqxhr, status, error) {
-            $("#update_error_detail").text("AJAX call failed (" + status + (error ? (": " + error) : "") + ").");
-            console.log("AJAX call failed (" + status + (error ? (": " + error) : "") + ").");
-            console.log(jqxhr);
-            console.log(status);
-            console.log(error);
+            status = jqxhr.status;
+            let errText = status + (error ? (": " + error) : "");
+            $("#update_error_detail").text(errText);
+            //console.error(errText);
             $("#update_error").css('display','block');
             StaleReceiverCount++;
             pendingFetches--;