From c3826a541685e82fb2e327b20f15badfec7f5f51 Mon Sep 17 00:00:00 2001
From: bergware <bergware@users.noreply.github.com>
Date: Thu, 26 Oct 2023 02:06:06 +0200
Subject: [PATCH] Dashboard: update time when timezone is changed

---
 emhttp/plugins/dynamix/DateTime.page       | 14 ++++++++-----
 emhttp/plugins/dynamix/include/ResetTZ.php | 23 ++++++++++++++++++++++
 2 files changed, 32 insertions(+), 5 deletions(-)
 create mode 100644 emhttp/plugins/dynamix/include/ResetTZ.php

diff --git a/emhttp/plugins/dynamix/DateTime.page b/emhttp/plugins/dynamix/DateTime.page
index f141e48c9..b3da8bdf5 100644
--- a/emhttp/plugins/dynamix/DateTime.page
+++ b/emhttp/plugins/dynamix/DateTime.page
@@ -4,8 +4,8 @@ Icon="icon-clock"
 Tag="clock-o"
 ---
 <?PHP
-/* Copyright 2005-2021, Lime Technology
- * Copyright 2012-2021, Bergware International.
+/* Copyright 2005-2023, Lime Technology
+ * Copyright 2012-2023, Bergware International.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version 2,
@@ -17,12 +17,12 @@ Tag="clock-o"
 ?>
 <?$keys = explode("\n", file_get_contents('webGui/include/timezones.key'));?>
 
-<form markdown="1" name="datetime_settings" method="POST" action="/update.htm" target="progressFrame">
+<form markdown="1" name="datetime_settings" method="POST" action="/update.htm" target="progressFrame" onsubmit="resetTZ(this.timeZone.value)">
 _(Current date and time)_:
 : <?=_(my_time(time()),0)?>
 
 _(Time zone)_:
-: <select name="timeZone" size="1"><?
+: <select name="timeZone"><?
   foreach ($keys as $key) {
     [$timezone, $city] = my_explode('|', $key);
     echo mk_option($var['timeZone'], $timezone, $city);
@@ -32,7 +32,7 @@ _(Time zone)_:
 :timezone_help:
 
 _(Use NTP)_:
-: <select name="USE_NTP" size="1" onchange="checkDateTimeSettings(this.form)">
+: <select name="USE_NTP" onchange="checkDateTimeSettings(this.form)">
   <?=mk_option($var['USE_NTP'], "yes", _('Yes'))?>
   <?=mk_option($var['USE_NTP'], "no", _('No'))?>
   </select>
@@ -69,6 +69,10 @@ _(New date and time)_:
 </form>
 
 <script>
+function resetTZ(new_tz) {
+  var old_tz = "<?=$var['timeZone']?>";
+  if (new_tz != old_tz) $.post('/webGui/include/ResetTZ.php');
+}
 function checkDateTimeSettings() {
   form = document.datetime_settings;
   if (form.USE_NTP.value=="yes") {
diff --git a/emhttp/plugins/dynamix/include/ResetTZ.php b/emhttp/plugins/dynamix/include/ResetTZ.php
new file mode 100644
index 000000000..d6a24ce8d
--- /dev/null
+++ b/emhttp/plugins/dynamix/include/ResetTZ.php
@@ -0,0 +1,23 @@
+<?PHP
+/* Copyright 2005-2023, Lime Technology
+ * Copyright 2012-2023, Bergware International.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ */
+?>
+<?
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
+$pid     = '/var/run/nchan.pid';
+$nchan   = 'webGui/nchan/update_3';
+
+if (is_file($pid) && exec("grep -Pom1 '^$nchan' $pid")) {
+  // restart update_3 script
+  exec("pkill -f $nchan");
+  exec("$docroot/$nchan &>/dev/null &");
+}
+?>