From 16475f04235061b934d304134542c067d610b3f6 Mon Sep 17 00:00:00 2001
From: Oliver Bienert <oliver.bienert@gmx.de>
Date: Wed, 11 Nov 2015 13:08:46 +0100
Subject: [PATCH] Added new configuration field 'noBackend' to prevent admin
 pages being redirected when set to true Check if this option is set at the
 beginning of method 'detectLanguageRedirect'

---
 AutodetectLanguage.module | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/AutodetectLanguage.module b/AutodetectLanguage.module
index ed85ea2..7792a86 100644
--- a/AutodetectLanguage.module
+++ b/AutodetectLanguage.module
@@ -36,11 +36,13 @@ class AutodetectLanguage extends WireData implements Module, ConfigurableModule
         $this->defaultSiteLanguageCode = "";
         $this->onlyOnHomepage = "";
 	$this->noDetectGetParam = "";
+        $this->noBackend = 1;
     }
 
     public function detectLanguageRedirect(HookEvent $event) {
-        if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
-            $page = wire("page");
+        $page = $event->object;
+        if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])
+            AND ($page->template != "admin" OR $this->noBackend == false)) {
 
             // defaults to "en" if unset
             if (empty($this->defaultSiteLanguageCode)) {
@@ -176,6 +178,13 @@ class AutodetectLanguage extends WireData implements Module, ConfigurableModule
 	if(isset($data['noDetectGetParam'])) $field->value = $data['noDetectGetParam'];
 	$inputfields->add($field);
 
-        return $inputfields; 
+        $field = wire('modules')->get('InputfieldCheckbox');
+        $field->name ='noBackend';
+        $field->label = 'Only detect language on frontend';
+        $field->attr('value', $data['noBackend'] ? $data['noBackend'] : 0 );
+        $field->attr('checked', $data['noBackend'] === 1 ? 'checked' : '' );
+        $inputfields->add($field);
+
+        return $inputfields;
     }
 }