From 5e711ba3b272ced1fee9dc0447f6402f377e7b23 Mon Sep 17 00:00:00 2001
From: Romain d'Alverny <rda@mageia.org>
Date: Fri, 22 Oct 2010 08:15:12 +0000
Subject: redirect root access after browser lang prefs

---
 localeDetection.class.php | 114 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 localeDetection.class.php

(limited to 'localeDetection.class.php')

diff --git a/localeDetection.class.php b/localeDetection.class.php
new file mode 100644
index 000000000..40e9862e4
--- /dev/null
+++ b/localeDetection.class.php
@@ -0,0 +1,114 @@
+<?php
+
+/* ChooseLocale
+ *
+ * Licence: MPL 2/GPL 2.0/LGPL 2.1
+ * Author: Pascal Chevrel, Mozilla
+ * Date : 2010-07-17
+ *
+ * Description:
+ * Class to choose the locale which locale we will show to the visitor
+ * based on http acceptlang headers and our list of supported locales.
+ *
+ *
+*/
+
+
+
+
+class ChooseLocale
+{
+    public    $HTTPAcceptLang;
+    public    $supportedLocales;
+    protected $detectedLocale;
+    protected $defaultLocale;
+    public    $mapLonglocales;
+
+
+    public function __construct($list=array('en-US'))
+    {
+        $this -> HTTPAcceptLang   = $_SERVER['HTTP_ACCEPT_LANGUAGE'];
+        $this -> supportedLocales = array_unique($list);
+        $this -> setDefaultLocale('en-US');
+        $this -> setCompatibleLocale();
+        $this -> mapLonglocales = true;
+
+    }
+
+    public function getAcceptLangArray()
+    {
+        if (empty($this->HTTPAcceptLang)) return null;
+
+        return explode(',', $this->HTTPAcceptLang);
+    }
+
+    public function getCompatibleLocale()
+    {
+        $l       = $this -> defaultLocale;
+        $acclang = $this -> getAcceptLangArray();
+
+        if(!is_array($acclang)) {
+            return $this -> defaultLocale;
+        }
+
+        foreach ($acclang as $var) {
+            $locale      = $this -> _cleanHTTPlocaleCode($var);
+            $shortLocale = array_shift(explode('-', $locale));
+
+            if (in_array($locale, $this -> supportedLocales)) {
+                $l = $locale;
+                break;
+            }
+
+            if (in_array($shortLocale, $this -> supportedLocales)) {
+                $l = $shortLocale;
+                break;
+            }
+
+            // check if we map visitors short locales to site long locales
+            // like en -> en-GB
+            if ($this -> mapLonglocales == true) {
+                foreach ($this -> supportedLocales as $var) {
+                    $shortSupportedLocale = array_shift(explode('-', $var));
+                    if ($shortLocale == $shortSupportedLocale) {
+                        $l = $var;
+                        break;
+                    }
+                }
+            }
+
+            }
+
+        return $l;
+    }
+
+    public function getDefaultLocale() {
+        return $this -> defaultLocale;
+    }
+
+    public function setCompatibleLocale() {
+        $this -> detectedLocale  = $this -> getCompatibleLocale();
+    }
+
+    public function setDefaultLocale($locale) {
+
+        // the default locale should always be among the site locales
+        // if not, the first locale in the supportedLocales array is default
+        if (!in_array($locale, $this -> supportedLocales)) {
+            $this -> defaultLocale = $this -> supportedLocales[0];
+
+        } else {
+            $this -> defaultLocale = $locale;
+        }
+        return;
+    }
+
+    private function _cleanHTTPlocaleCode($str)
+    {
+        $locale = explode(';', $str);
+        $locale = trim($locale[0]);
+
+        return $locale;
+    }
+
+}
\ No newline at end of file
-- 
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