From 78dc766e64e3fe8b6cd13eeeb53cf6091a1cbb75 Mon Sep 17 00:00:00 2001
From: Eike Foken <kontakt@eikefoken.de>
Date: Fri, 22 Apr 2011 01:48:12 +0200
Subject: [PATCH 1/3] Rename session userdata 'id' to 'user_id'

---
 application/models/user.php | 1 -
 1 file changed, 1 deletion(-)

diff --git a/application/models/user.php b/application/models/user.php
index 1d73ed3..b019b64 100644
--- a/application/models/user.php
+++ b/application/models/user.php
@@ -274,7 +274,6 @@ class User extends CI_Model {
 
                 $session_data = array(
                     'username' => $result->username,
-                    'id' => $result->id, // kept for backwards compatibility
 					'user_id' => $result->id,
 					'group_id' => $result->group_id,
 					'group' => $group->name

From ad2adc97422b9bc7115f98fbe240f6d870d4286f Mon Sep 17 00:00:00 2001
From: Eike Foken <kontakt@eikefoken.de>
Date: Fri, 22 Apr 2011 02:09:36 +0200
Subject: [PATCH 2/3] Begin implementing a custom session class

---
 application/libraries/MY_Session.php | 84 ++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 application/libraries/MY_Session.php

diff --git a/application/libraries/MY_Session.php b/application/libraries/MY_Session.php
new file mode 100644
index 0000000..58c9f97
--- /dev/null
+++ b/application/libraries/MY_Session.php
@@ -0,0 +1,84 @@
+<?php defined('BASEPATH') || exit("No direct script access allowed");
+
+/**
+ * Extends CI's session class.
+ *
+ * @author Eike Foken
+ */
+class MY_Session extends CI_Session {
+
+    /**
+     * Calls the parent constructor.
+     */
+    public function __construct() {
+        parent::__construct();
+    }
+
+    /**
+     * Generates a random and unique session ID.
+     *
+     * @return string
+     */
+    private function generateHash() {
+        return sha1(uniqid(microtime() . $this->CI->input->ip_address(), true));
+    }
+
+    /**
+     * Creates a new session.
+     */
+    public function sess_create() {
+        $this->userdata = array(
+        	'session_id' => $this->generateHash(),
+        	'ip_address' => $this->CI->input->ip_address(),
+        	'user_agent' => substr($this->CI->input->user_agent(), 0, 50),
+        	'last_activity' => $this->now
+        );
+
+        // save data to the DB if needed
+        if ($this->sess_use_database === true) {
+            $this->CI->db->insert($this->sess_table_name, $this->userdata);
+        }
+
+        // write the cookie
+        $this->_set_cookie();
+    }
+
+    /**
+     * Updates an existing session.
+     */
+    public function sess_update() {
+        if ($this->userdata['last_activity'] + $this->sess_time_to_update >= $this->now) {
+            return;
+        }
+
+        $oldSessionID = $this->userdata['session_id'];
+        $newSessionID = $this->generateHash();
+
+        $this->userdata['session_id'] = $newSessionID;
+        $this->userdata['last_activity'] = $this->now;
+
+        $cookieData = null;
+
+        // update the DB if needed
+        if ($this->sess_use_database === true) {
+            // set cookie explicitly to only have our session data
+            $cookieData = array();
+            foreach (array('session_id', 'user_id', 'ip_address', 'user_agent', 'last_activity') as $val) {
+                $cookieData[$val] = $this->userdata[$val];
+            }
+
+            $this->CI->db->update($this->sess_table_name, array('last_activity' => $this->now, 'user_id' => $this->userdata['user_id'], 'session_id' => $newSessionID), array('session_id' => $oldSessionID));
+
+            // update users table if user is logged in
+            if (array_key_exists('user_id', $this->userdata) && $this->userdata['user_id'] > 0) {
+                $this->CI->db->update('users', array('last_activity' => $this->now), array('id' => $this->userdata['user_id']));
+            }
+        }
+
+        // write the cookie
+        $this->_set_cookie($cookieData);
+    }
+}
+
+/* End of file MY_Session.php */
+/* Location: ./application/libraries/MY_Session.php */

From 2ee4d42d7cad7a6b4bc8702cb2e13c6f1f483539 Mon Sep 17 00:00:00 2001
From: Eike Foken <kontakt@eikefoken.de>
Date: Fri, 22 Apr 2011 02:38:25 +0200
Subject: [PATCH 3/3] Implement URI language detection

---
 application/config/routes.php         | 3 +++
 application/libraries/Lang_detect.php | 5 ++---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/application/config/routes.php b/application/config/routes.php
index 47a4a68..08648da 100755
--- a/application/config/routes.php
+++ b/application/config/routes.php
@@ -41,6 +41,9 @@
 $route['default_controller'] = "auth";
 $route['404_override'] = '';
 
+$route['(\w{2})/(.*)'] = '$2';
+$route['(\w{2})'] = $route['default_controller'];
+
 
 /* End of file routes.php */
 /* Location: ./application/config/routes.php */
\ No newline at end of file
diff --git a/application/libraries/Lang_detect.php b/application/libraries/Lang_detect.php
index 4a9563f..7f2b3ae 100644
--- a/application/libraries/Lang_detect.php
+++ b/application/libraries/Lang_detect.php
@@ -128,9 +128,8 @@ class Lang_detect {
         for ($i = $this->CI->uri->total_segments(); $i > 0; $i--) {
             $segment = $this->CI->uri->segment($i);
             // the uri segment with the language code has the prefix 'l_'
-            if (!empty($segment) && (strpos($segment, 'l_') === 0)) {
-                // extract the language code
-                return substr($segment, 2);
+            if (strlen($segment) == 2 && array_key_exists($segment, $this->languages)) {
+                return $segment;
             }
         }
         return false;