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File: xoopslocal.php
<?php
/*
 You may not change or alter any portion of this comment or credits
 of supporting developers from this source code or any supporting source code 
 which is considered copyrighted (c) material of the original comment or credit authors.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/

/**
 * Xoops Localization abstract class
 *
 * @copyright   The XOOPS project http://www.xoops.org/
 * @license     http://www.fsf.org/copyleft/gpl.html GNU public license
 * @package     class
 * @since       2.3.0
 * @author      Taiwen Jiang <phppp@users.sourceforge.net>
 * @version     $Id: xoopslocal.php 1452 2008-04-18 07:57:42Z phppp $
 */

class XoopsLocalAbstract
{
    // localized substr
    function substr($str, $start, $length, $trimmarker = '...')
    {
        if ( !XOOPS_USE_MULTIBYTES ) {
            return ( strlen($str) - $start <= $length ) ? substr( $str, $start, $length ) : substr( $str, $start, $length - strlen($trimmarker) ) . $trimmarker;
        }
        
        if ( function_exists('mb_internal_encoding') && @mb_internal_encoding(_CHARSET) ) {
            $str2 = mb_strcut( $str , $start , $length - strlen( $trimmarker ) );
            return $str2 . ( mb_strlen($str) != mb_strlen($str2) ? $trimmarker : '' );
        }
        
        return $str;
    }
    
    // Each local language should define its own equalient utf8_encode 
    function utf8_encode($text)
    {
        if (XOOPS_USE_MULTIBYTES == 1) {
            if (function_exists('mb_convert_encoding')) {
                return mb_convert_encoding($text, 'UTF-8', 'auto');
            }
        }
        return utf8_encode($text);
    }
    
    function convert_encoding($text, $to = 'utf-8', $from = '')
    {
        if (empty($text)) {        
            return $text;
        }
        if (empty($from)) {
            $from = empty($GLOBALS["xlanguage"]['charset_base']) ? _CHARSET : $GLOBALS["xlanguage"]['charset_base'];
        }
        if (empty($to) || !strcasecmp($to, $from)) {
            return $text;
        }
    
        if (XOOPS_USE_MULTIBYTES && function_exists('mb_convert_encoding')) {
            $converted_text = @mb_convert_encoding($text, $to, $from);
        } elseif (function_exists('iconv')) {
            $converted_text = @iconv($from, $to . "//TRANSLIT", $text);
        }
        $text = empty($converted_text) ? $text : $converted_text;
    
        return $text;
    }

    function trim($text)
    {
        $ret = trim($text);
        return $ret;
    }

    /**
     * Get description for setting time format
     */    
    function getTimeFormatDesc()
    {
        return _TIMEFORMAT_DESC;
    }
    
    /**
     * Function to display formatted times in user timezone
     *
     * Setting $timeoffset to null (by default) will skip timezone calculation for user, using default timezone instead, which is a MUST for cached contents
     */
    function formatTimestamp($time, $format = "l", $timeoffset = null)
    {
        global $xoopsConfig, $xoopsUser;
        
        $format_copy = $format;
        $format = strtolower($format);
        
        if ($format == "rss" || $format == "r") {
            $TIME_ZONE = "";
            if (!empty($GLOBALS['xoopsConfig']['server_TZ'])) {
                $server_TZ = abs( intval( $GLOBALS['xoopsConfig']['server_TZ'] * 3600.0 ) );
                $prefix = ($GLOBALS['xoopsConfig']['server_TZ'] < 0) ?  " -" : " +";
                $TIME_ZONE = $prefix . date("Hi", $server_TZ);
            }
            $date = gmdate("D, d M Y H:i:s", intval($time)) . $TIME_ZONE;
            return $date;
        }
        
        if ( ($format == "elapse" || $format == "e") && $time < time() ) {
            $elapse = time() - $time;
            if ( $days = floor( $elapse / (24 * 3600) ) ) {
                $num = $days > 1 ? sprintf(_DAYS, $days) : _DAY;
            } elseif ( $hours = floor( ( $elapse % (24 * 3600) ) / 3600 ) ) {
                $num = $hours > 1 ? sprintf(_HOURS, $hours) : _HOUR;
            } elseif ( $minutes = floor( ( $elapse % 3600 ) / 60 ) ) {
                $num = $minutes > 1 ? sprintf(_MINUTES, $minutes) : _MINUTE;
            } else {
                $seconds = $elapse % 60;
                $num = $seconds > 1 ? sprintf(_SECONDS, $seconds) : _SECOND;
            }
            $ret = sprintf(_ELAPSE, $num);
               return $ret;
        }
        
        // disable user timezone calculation and use default timezone,
        // for cache consideration
        if ($timeoffset === null) {
            $timeoffset = ($xoopsConfig['default_TZ'] == '') ? '0.0' : $xoopsConfig['default_TZ'];
        }
        
        $usertimestamp = xoops_getUserTimestamp($time, $timeoffset);
        
        switch ($format) {
        case 's':
            $datestring = _SHORTDATESTRING;
            break;
            
        case 'm':
            $datestring = _MEDIUMDATESTRING;
            break;
            
        case 'mysql':
            $datestring = "Y-m-d H:i:s";
            break;
            
        case 'l':
            $datestring = _DATESTRING;
            break;
            
        case 'c':
        case 'custom':
            static $current_timestamp, $today_timestamp, $monthy_timestamp;
            if (!isset($current_timestamp)) {
                $current_timestamp = xoops_getUserTimestamp(time(), $timeoffset);
            }
            if (!isset($today_timestamp)) {
                $today_timestamp = mktime(0, 0, 0, date("m", $current_timestamp), date("d", $current_timestamp), date("Y", $current_timestamp));
            }
            
            if ( abs($elapse_today = $usertimestamp - $today_timestamp) < 24*60*60 ) {
                $datestring = ($elapse_today > 0) ? _TODAY : _YESTERDAY;
            } else {
                if (!isset($monthy_timestamp)) {
                    $monthy_timestamp[0] = mktime(0, 0, 0, 0, 0, date("Y", $current_timestamp));
                    $monthy_timestamp[1] = mktime(0, 0, 0, 0, 0, date("Y", $current_timestamp) + 1);
                }
                if ($usertimestamp >= $monthy_timestamp[0] && $usertimestamp < $monthy_timestamp[1]) {
                    $datestring = _MONTHDAY;
                } else {
                    $datestring = _YEARMONTHDAY;
                }
            }
            break;
            
        default:
            if ($format != '') {
                $datestring = $format_copy;
            } else {
                $datestring = _DATESTRING;
            }
            break;
        }
        
        return ucfirst(date($datestring, $usertimestamp));
    }
    
    function number_format($number)
    {
        return $number;
    }
    
    function money_format($format, $number)
    {
        return $number;
    }
    
    function __call($name, $args)
    {
        if (function_exists($name)) {
            return call_user_func_array( $name, $args );
        }
    }
}

?>