Subversion-Projekte lars-tiefland.prado

<?php

/**
 * HTTPNegotiator class file.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the BSD License.
 *
 * Copyright(c) 2004 by Qiang Xue. All rights reserved.
 *
 * To contact the author write to {@link mailto:qiang.xue@gmail.com Qiang Xue}
 * The latest version of PRADO can be obtained from:
 * {@link http://prado.sourceforge.net/}
 *
 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
 * @version $Revision: 1.2 $  $Date: 2005/01/05 03:15:14 $
 * @package System.I18N.core
 */

/**
 * Include the CultureInfo class.
 */
require_once(dirname(__FILE__).'/CultureInfo.php');

/**
 * HTTPNegotiator class.
 *
 * Get the language and charset information from the client browser.
 *
 * @author Xiang Wei Zhuo <weizhuo[at]gmail[dot]com>
 * @version v1.0, last update on Fri Dec 24 16:01:35 EST 2004
 * @package System.I18N.core
 */
class HTTPNegotiator
{
        /**
         * A list of languages accepted by the browser.
         * @var array
         */
        protected $languages;

        /**
         * A list of charsets accepted by the browser
         * @var array
         */
        protected $charsets;

        /**
         * Get a list of languages acceptable by the client browser
         * @return array languages ordered in the user browser preferences.
         */
        function getLanguages()
        {
                if($this->languages !== null) {
                        return $this->languages;
                }

                $this->languages = array();

                if (!isset($_SERVER['HTTP_ACCEPT_LANGUAGE']))
            return $this->languages;

                //$basedir = CultureInfo::dataDir();
                //$ext = CultureInfo::fileExt();
                $info = new CultureInfo();

                foreach(explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']) as $lang)
                {
            // Cut off any q-value that might come after a semi-colon
            if ($pos = strpos($lang, ';'))
                $lang = trim(substr($lang, 0, $pos));

                        if (strstr($lang, '-'))
                        {
                                $codes = explode('-',$lang);
                                if($codes[0] == 'i')
                                {
                    // Language not listed in ISO 639 that are not variants
                    // of any listed language, which can be registerd with the
                    // i-prefix, such as i-cherokee
                                        if(count($codes)>1)
                                                $lang = $codes[1];
                                }
                                else
                                {
                                        for($i = 0, $k = count($codes); $i<$k; ++$i)
                                        {
                                                if($i == 0)
                                                        $lang = strtolower($codes[0]);
                                                else
                                                        $lang .= '_'.strtoupper($codes[$i]);
                                        }
                                }
            }



                        if($info->validCulture($lang))
                                $this->languages[] = $lang;
        }

                return $this->languages;
        }

        /**
         * Get a list of charsets acceptable by the client browser.
         * @return array list of charsets in preferable order.
         */
        function getCharsets()
        {
        if($this->charsets !== null) {
                        return $this->charsets;
                }

                $this->charsets = array();

                if (!isset($_SERVER['HTTP_ACCEPT_CHARSET']))
            return $this->charsets;

                foreach (explode(',', $_SERVER['HTTP_ACCEPT_CHARSET']) as $charset)
                {
            if (!empty($charset))
                $this->charsets[] = preg_replace('/;.*/', '', $charset);
        }

                return $this->charsets;
        }
}