AjaxHandler

* separated into appropriate subclasses
* unified sanitizing of $_GET and $_POST data using build in filter_input()
* index now always tries to resolve page calls with ajaxHandler first and as a page last

minor bug-fixes to bugs that wre not reported yet, because they didn't occur yet
(e.g.: nobody tried to compose a comment with >7500 characters yet)

includes/ajaxHandler/locale.class.php

@@ -0,0 +1,33 @@
+<?php
+
+if (!defined('AOWOW_REVISION'))
+    die('invalid access');
+
+class AjaxLocale extends AjaxHandler
+{
+    protected $_get = array(
+        'locale' => [FILTER_CALLBACK, ['options' => 'AjaxHandler::checkLocale']]
+    );
+
+    public function __construct(array $params)
+    {
+        parent::__construct($params);
+
+        // always this one
+        $this->handler    = 'handleLocale';
+        $this->doRedirect = true;
+    }
+
+    /* responses
+        header()
+    */
+    protected function handleLocale()
+    {
+        User::setLocale($this->_get['locale']);
+        User::save();
+
+        return isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '.';
+    }
+}
+
+?>