From 5ffa0ad4d3fc8df1ba9ff170ba6c82644d51d802 Mon Sep 17 00:00:00 2001
From: Thomas Hochstein <thh@inter.net>
Date: Tue, 24 Mar 2020 12:58:43 +0100
Subject: [PATCH] Get language selector working.

The chosen language got lost (reset to "en") after following the next
link, as the language field wasn't part of those links.

Now we choose the language in three steps:

If "language" ist set (after using the language selector form), we use
that.

If it isn't set but a plugin group was chosen, we take the right
language from the filename of that page.

Only if neither is set we fall back to english.

Moreover we keep the current language "selected" in the language
selector dropdown.

Signed-off-by: Thomas Hochstein <thh@inter.net>
---
 homepage/index.php | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/homepage/index.php b/homepage/index.php
index 2ed19345..fad9a80d 100644
--- a/homepage/index.php
+++ b/homepage/index.php
@@ -1,17 +1,24 @@
 <?php
+# language switch
 if (isset($_GET['language'])) {
     #setcookie('language', $_GET['language']);
 }
-if (empty($_REQUEST['language'])) {
-    $_REQUEST['language'] = 'en';
+# if language (from language selector form) is set, set LANG accordingly
+if (!empty($_REQUEST['language'])) {
+    define('LANG', preg_replace('@[^a-z_]@i', '', $_REQUEST['language']));
+  # if a plugin group is displayed, get LANG from page name
+} elseif (!empty($_REQUEST['mode']) && (substr(($_REQUEST['mode']), 0, 8) != 'template')) {
+    define('LANG', preg_replace('@[^a-z_]@i', '', end(explode('_',$_REQUEST['mode']))));
+  # fall back to default (english)
+} else {
+    define('LANG', 'en');
 }
-define('LANG', preg_replace('@[^a-z_]@i', '', $_REQUEST['language']));
 if (is_dir('homepage')) {
     define('BASEDIR', 'homepage/');
 } else {
     define('BASEDIR', '');
 }
-if (!empty($_REQUEST['mode']) && (substr(($_REQUEST['mode']), 0, 8) != 'template')) {
+if (!empty($_REQUEST['mode']) && !empty($_REQUEST['language']) && (substr(($_REQUEST['mode']), 0, 8) != 'template')) {
     $page_language = end(explode('_',$_REQUEST['mode']));
     if ($page_language != LANG) { 
         $_REQUEST['mode'] = preg_replace ('/'.$page_language.'$/', LANG, $_REQUEST['mode']);
@@ -136,7 +143,7 @@ if (!empty($_REQUEST['mode']) && (substr(($_REQUEST['mode']), 0, 8) != 'template
                                       'ta' => 'Tamil');
                         foreach($lang as $l => $d) {
                     ?>
-                            <option value="<?php echo $l; ?>"><?php echo htmlspecialchars($d, ENT_COMPAT, 'UTF-8'); ?></option>
+                            <option value="<?php echo $l ?>"<?php echo ($l == LANG) ? ' selected' : ''; ?>><?php echo htmlspecialchars($d, ENT_COMPAT, 'UTF-8'); ?></option>
                     <?php
                         }
                     ?>