From 44ad3426f83a846ab39a69ca007b0c3b5fb0de42 Mon Sep 17 00:00:00 2001
From: Moritz Warning <moritzwarning@web.de>
Date: Sun, 29 Mar 2020 20:00:59 +0200
Subject: [PATCH] use browser language setting as first choice

---
 index.html |  2 +-
 index.js   | 10 ++++++++--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/index.html b/index.html
index 5e99566..5d4a256 100644
--- a/index.html
+++ b/index.html
@@ -16,7 +16,7 @@
 		<img src="logo.png" alt="Logo">
 		<div style="flex-grow: 1;"></div>
 
-		<select id="language-selection" onchange="current_language=this.children[this.selectedIndex].value; translate();" size="1">
+		<select id="language-selection" onchange="config.language=this.children[this.selectedIndex].value; translate();" size="1">
 			<option value="en">English</option>
 			<option value="de">Deutsch</option>
 		</select>
diff --git a/index.js b/index.js
index fadbfe7..b652815 100644
--- a/index.js
+++ b/index.js
@@ -1,6 +1,5 @@
 
 var current_model = {};
-var current_language = config.language;
 
 function $(id) {
   return document.getElementById(id);
@@ -125,7 +124,7 @@ function setupSelectList(select, items, onselection) {
 
 // Change the translation of the entire document
 function translate() {
-  var mapping = translations[current_language];
+  var mapping = translations[config.language];
   for (var tr in mapping) {
     Array.from(document.getElementsByClassName(tr))
       .forEach(e => { e.innerText = mapping[tr]; })
@@ -376,4 +375,11 @@ if (config.asu_url) {
 
 // hide fields
 updateImages();
+
+var user_lang = (navigator.language || navigator.userLanguage).split('-')[0];
+if (user_lang in translations) {
+  config.language = user_lang;
+  $('language-selection').value = user_lang;
+}
+
 translate();
-- 
2.30.2