set customer language to cookie

init.php

@@ -134,6 +134,8 @@ if ((!empty($radius_user) && $config['radius_enable']) || _post('radius_enable')
 // Check if the user has selected a language
 if (!empty($_SESSION['user_language'])) {
     $config['language'] = $_SESSION['user_language'];
+}else if (!empty($_COOKIE['user_language'])) {
+    $config['language'] = $_COOKIE['user_language'];
 }
 
 if (empty($_SESSION['Lang'])) {

ui/ui/sections/user-footer.tpl

@@ -108,6 +108,28 @@
                 })
             });
         });
+
+        function setCookie(name, value, days) {
+            var expires = "";
+            if (days) {
+                var date = new Date();
+                date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
+                expires = "; expires=" + date.toUTCString();
+            }
+            document.cookie = name + "=" + (value || "") + expires + "; path=/";
+        }
+
+        function getCookie(name) {
+            var nameEQ = name + "=";
+            var ca = document.cookie.split(';');
+            for (var i = 0; i < ca.length; i++) {
+                var c = ca[i];
+                while (c.charAt(0) == ' ') c = c.substring(1, c.length);
+                if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
+            }
+            return null;
+        }
+        setCookie('user_language', '{/literal}{$user_language}{literal}', 365);
     </script>
 {/literal}