Some improvements and fixes for webgui

webgui/globals.inc

@@ -56,6 +56,9 @@ $g_scriptname = basename($_SERVER['SCRIPT_NAME']);
 require 'config.inc';
 
 // Localization
+
+$lang = get_browser_lang(['de', 'en']);
+
 setlocale(LC_ALL, $g_locale);
 $g_lconv = localeconv();
 $g_lang = substr($g_locale, 0, 2); // short language identifier
@@ -244,6 +247,7 @@ class User {
     public $datefmt;
     public $rows_pp;
     public $menu;
+    public $language;
 
     private function __construct() {
         global $g_rows_pp;
@@ -255,6 +259,7 @@ class User {
         $this->datefmt = 'Y-m-d';
         $this->rows_pp = $g_rows_pp;
         $this->menu = [1, 2, 3, 4, 5, 6];
+        $this->language = 'en';
     }
 
     public static function getInstance() {
@@ -317,13 +322,14 @@ class User {
         }
 
         $this->id = $_SESSION['userid'];
-        $sql = "SELECT displayname, role FROM user WHERE userid=?";
+        $sql = "SELECT displayname, role, language FROM user WHERE userid=?";
         $sth = $pdo->prepare($sql);
         $sth->execute([$this->id]);
         $row = $sth->fetch();
         if ($row) {
             $this->displayname = $row['displayname'];
             $this->role = $row['role'];
+            $this->language = $row['language'];
         }
     }
 
@@ -1251,15 +1257,16 @@ function format_currency($val) {
 }
 
 function format_date($date) {
+    // date is string in ISO format
     global $user;
-    // $user->datefmt;
-   /*'Y-m-d' => _('YYYY-MM-DD'). $curdate->format(' - Y-m-d'),
-   'Y/m/d' => _('YYYY/MM/DD'). $curdate->format(' - Y/m/d'),
-   'd.m.Y' => _('DD.MM.YYYY'). $curdate->format(' - d.m.Y'),
-   'd/m/Y' => _('DD/MM/YYYY'). $curdate->format(' - d/m/Y'),
-   'm-d-Y' => _('MM/DD/YYYY'). $curdate->format(' - m-d-Y') */
-    
-    return '';
+    if (empty($date)) {
+        return '';
+    }
+    $timestamp = strtotime($date);
+    if ($timestamp === false) {
+        return '';
+    }
+    return date($user->datefmt, $timestamp);
 }
 
 function format_color($color) {
@@ -1345,6 +1352,30 @@ function header_location($location, $message=NULL) {
     exit;
 }
 
+function get_browser_lang($allowed, $default='en') {
+    $h = $_SERVER['HTTP_ACCEPT_LANGUAGE'] ?? '';
+    if (!$h) {
+        return $def;
+    }
+    $langs = [];
+    foreach (explode(',', $h) as $p) {
+        $p = explode(';q=', trim($p));
+        $l = strtolower($p[0]);
+        $q = isset($p[1]) ? (float) $p[1] : 1.0;
+        $langs[$l] = $q;
+    }
+    arsort($langs);
+    foreach ($langs as $bl => $q) {
+        foreach ($allowed as $l) {
+            $l = strtolower($l);
+            if ($bl === $l || str_starts_with($bl, $l . '-')) {
+                return $l;
+            }
+        }
+    }
+    return $default;
+}
+
 function pgettext($context, $msgid) {
     // implement missing function
     global $g_textdomain;