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<?php
/**
 * encapsulate Zend_Translate within an singleton class
 * @author markus
 * $Id: I18n.php 33 2009-12-10 15:08:38Z markus $
 */

require_once('l10n/L10n.php');

class I18n {
    /**
     * static pointer to instance
     * @var array(I18n)
     */
    private static $instance = null;

    /**
     * config object
     * @var Zend_Translate
     */
    private $translate = null;

    /**
     * make new translate
     */
    protected function __construct() {
        $options = array(
            'log'                => Log::Log(),
            'logUntranslated'    => false
        );

        $locale = L10n::getInstance();
        $supported = $locale->getBrowser();
        arsort($supported, SORT_NUMERIC);

        $file = '';
        foreach ($supported as $loc => $val) {
            if (file_exists(LOCALE_PATH . '/' . $loc . '/locale.php')) {
                $file = LOCALE_PATH . '/' . $loc . '/locale.php';
                $locale->setLocale($loc);
                break;
            }
        }

        if ($file == '' && file_exists(LOCALE_PATH . '/en_US/locale.php')) {
            $file = LOCALE_PATH . '/en_US/locale.php';
            $locale->setLocale('en_US');
        }

        if ($file != '') {
            $this->translate = new Zend_Translate(Zend_Translate::AN_ARRAY, $file, $locale->getLanguage(), $options);
            #Log::Log()->debug('locale ' . $locale->getLanguage() . '_' .$locale->getRegion() . ' loaded');
        }
        else
            throw new Exception(__METHOD__ . ': no translation files available');
    }

    /**
     * get already existing instance, make new instance or throw an exception
     * @return I18n
     */
    public static function getInstance() {
        if (self::$instance === null) {
            self::$instance = new I18n();
        }

        return self::$instance;
    }

    /**
     * return the Zend_Translate object
     * @return Zend_Translate
     */
    public static function getTranslate() {
        return self::getInstance()->translate;
    }

    /**
     * map _ to translate
     * @param unknown_type $text
     * @param unknown_type $locale
     */
    public function _($text, $locale = null) {
        return self::getInstance()->translate->_($text, $locale);
    }

    /**
     * magic __call dispatches all unknown methods to Zend_Translate
     * @param unknown_type $method
     * @param unknown_type $arguments
     */
    public function __call($method, $arguments) {
        return call_user_func_array(array($this->translate, $method), $arguments);
    }
}