<?php

/** 
 * http://www.alternateinterior.com/2006/09/a-viewstate-for-php.html
 * Управление состоянием между страницами
 */
namespace ctiso\Form;

class ViewState // extends Collection
{
    private $values = array();

    function set($name, $value) 
    {
        $this->values[$name] = $value;
    }

    function get($_rest) 
    {
        $args = func_get_args();
        $result = $this->values;
        foreach ($args as $name) {
            if (!isset($result[$name])) {
                return null;
            }
            $result = $result[$name];
        }
        return $result;
    }

    function saveState()
    {
        return base64_encode(serialize($this->values));
    }

    function restoreState($value)
    {
        $this->values = unserialize(base64_decode($value));
    }

    function export()
    {
        return $this->values;
    }
}