<?php
/**
 * Системный класс, для установки и настройки мультиязычности
 * @author norbis, keeper
 * @category
 * @package
 * @subpackage
 * @copyright  Copyright (c) 2005-2011 ITCrimea Ukraine Inc. (http://www.itcrimea.com)
 * @license
 */
class System_Locale extends System 
{

    /**
     * @var Zend_Locale
     */
    private $objectZendLocale = null;
    
	/**
     * Documentation
     *
     * @var System_Locale
     */
    protected static $_instance = null;
    
    /**
     * Has the Syste_Locale been preDispatched?
     * @var boolean
     */
    protected $_dispatched = false;
    
    /**
    * Функция инициализации
    * @author [email protected]
    * @return void
    */
    public function _init()
    {

    }

    /**
    * Функция запуска
    * @author
    * @return void
    */
    public function _run()
    {
    }
    
    /**
    * Documentation
    * @author
    * @return mixed
    */
    public function _preDispatch(Zend_Controller_Request_Abstract $request)
    {
        
        
        $arrLanguages = $this->getLanguages();
        
        // search Language in request
        $paramLanguage = $request->getParam('language');
        if (!in_array($paramLanguage, $arrLanguages)) {
            $paramLanguage = null;
        }
        
        // search Language in session
        if (!$paramLanguage) {
            if ($this->getConfig()->SaveInSession) {
                if (System_Session::isSetParam('System_Locale_Language')) {
                    $paramLanguage = System_Session::getParam('System_Locale_Language');
                    if (!in_array($paramLanguage, $arrLanguages)) {
                        $paramLanguage = null;
                    }
                }
            }
        }
        
        // search Language in Zend_Locale
        /*if (!$paramLanguage) {
            $paramLanguage = Zend_Locale::getDefault();
            if (!in_array($paramLanguage, $arrLanguages)) {
                $paramLanguage = null;
            }
        }*/
        
        // get Language defined in config as default
        if (!$paramLanguage) {
            $paramLanguage = System_Locale::getInstance()->getDefaultLang();
        }
        
        System_Router::getInstance()->getRouter()->setGlobalParam('language', $paramLanguage);
        
        $this->objectZendLocale = new Zend_Locale($paramLanguage);
        
        // save Language in session
        if ($this->getConfig()->SaveInSession) {
            System_Session::setParam('System_Locale_Language', $paramLanguage);
        }
        
        $this->setDispatched(true);
    }
    
    /**
     * Set flag indicating whether or not Syste_Locale has been dispatched
     * @param boolean $flag
     * @return Zend_Controller_Request_Abstract
     */
    public function setDispatched($flag = true)
    {
        $this->_dispatched = $flag ? true : false;
        return $this;
    }

    /**
     * Determine if the Syste_Locale has been preDispatched
     *
     * @return boolean
     */
    public function isDispatched()
    {
        return $this->_dispatched;
    }
    
    
    /**
    * Возвращает массив языков из конфига 
    * @author [email protected]
    * @return array
    */
    public function getLanguages()
    {
        return $this->_config->languages->toArray();
    }
    
    /**
    * Возвращает строку, язык по-умолчанию из конфига
    * @author [email protected]
    * @return string
    */
    public function getDefaultLang()
    {
        return $this->_config->default;
    }
    
    
    /**
    * Возвращает строку, текущий язык
    * @author keeper
    * @return string
    */
    public static function getLanguage()
    {
        return self::getZendLocale()->getLanguage();
    }
    
    /**
    * return registered Zend_Locale exemplar
    * @author keeper
    * @return Zend_Locale
    */
    public function _getZendLocale()
    {
        if (!is_object($this->objectZendLocale)) {
            $this->objectZendLocale = new Zend_Locale($this->getDefaultLang());
        }
        return $this->objectZendLocale;
    }
    /**
    * return registered Zend_Locale exemplar
    * @author keeper
    * @return Zend_Locale
    */
    public static function getZendLocale()
    {
        return self::getInstance()->_getZendLocale();
    }
    
    
    
    /**
    * Реализация функции для SingleTone паттерна
    * @author [email protected]
    * @return System_Locale
    */
    public static function getInstance()
    {
        if (null === self::$_instance) {
            self::$_instance = new self();
        }
        return self::$_instance;
    }    
}