<?php

require_once 'core/safecollection.php';
require_once 'core/json.php';
require_once 'core/session.php';

/**
 * Неверный запрос 
 */ 
class WrongRequestException extends Exception
{
}

// HTTPRequest = ArrayAccess
class HttpRequest extends Collection implements ArrayAccess
{
    /**
     * Constructor
     * Stores "request data" in GPC order.
     */
    public function __construct()
    {
        $list = array (
            'data'   => $_REQUEST, 
            'get'    => $_GET, 
            'post'   => $_POST, 
            'cookie' => $_COOKIE);

        $ajax = $this->isAjax();
        foreach ($list as $key => $value) {
            $data = new SafeCollection();
            $data->import($value);

            parent::set($key, $data);
        }

        $data = new Collection();
        $data->import($GLOBALS['_FILES']);
        parent::set('files', $data);
    }

    function get($key, $default = null)
    {
        return parent::get('data')->get($key, $default);
    }
    
    function session($value = false)
    {
        if ($value) {
            $this->session = $value;            
        }
        return $this->session;
    }

    function set($key, $value)
    {
        return parent::get('data')->set($key, $value);
    }


    function _get($key)
    {
        return parent::get($key);
    }

    function export()
    {
        return parent::get('data')->export();
    }

    /* Array Acces Interface */
    function offsetExists($offset)
    {
    }

    function offsetGet($offset)
    {
    }

    function offsetSet($offset, $value)
    {
    }

    function offsetUnset($offset)
    {
    }

    function clear()
    {
        return parent::get('data')->clear();
    }

    /**
     * Allow access to data stored in GET, POST and COOKIE super globals.
     *
     * @param string $var
     * @param string $key
     * @return mixed
     */
    public function getRawData($var, $key)
    {
        $data = parent::get(strtolower($var));
        if ($data) {
            return $data->get($key);
        }
        return null;
    }

    public function setRawData($var, $key, $val)
    {
        $data = parent::get(strtolower($var));
        if ($data) {
            return $data->set($key, $val);
        }
    }

    public function setAction($name)
    {   
        $this->setRawData('get', 'action', $name);
    }

    public function getAction()
    {
        $result = $this->getRawData('get', 'action');
        return ($result) ? $result : 'index';
    }

    public function isAjax()
    {
        return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && ($_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest');
    }
}