<?php

/**

 * Smarty plugin

 *

 * @package    Smarty

 * @subpackage PluginsModifier

 */

/**

 * Smarty truncate modifier plugin

 * Type:     modifier<br>

 * Name:     truncate<br>

 * Purpose:  Truncate a string to a certain length if necessary,

 *               optionally splitting in the middle of a word, and

 *               appending the $etc string or inserting $etc into the middle.

 *

 * @link   http://smarty.php.net/manual/en/language.modifier.truncate.php truncate (Smarty online manual)

 * @author Monte Ohrt <monte at ohrt dot com>

 *

 * @param string $string input string

 * @param integer $length length of truncated text

 * @param string $etc end string

 * @param boolean $break_words truncate at word boundary

 * @param boolean $middle truncate in the middle of text

 *

 * @return string truncated string

 */

function smarty_modifier_truncate($string, $length = 80, $etc = '...', $break_words = false, $middle = false) {

    if ($length == 0) {

        return '';

    }

    if (Smarty::$_MBSTRING) {

        if (mb_strlen($string, Smarty::$_CHARSET) > $length) {

            $length -= min($length, mb_strlen($etc, Smarty::$_CHARSET));

            if (!$break_words && !$middle) {

                $string = preg_replace('/\s+?(\S+)?$/' . Smarty::$_UTF8_MODIFIER, '', mb_substr($string, 0, $length + 1, Smarty::$_CHARSET));

            }

            if (!$middle) {

                return mb_substr($string, 0, $length, Smarty::$_CHARSET) . $etc;

            }

            return mb_substr($string, 0, $length / 2, Smarty::$_CHARSET) . $etc . mb_substr($string, -$length / 2, $length, Smarty::$_CHARSET);

        }

        return $string;

    }

    // no MBString fallback

    if (isset($string[$length])) {

        $length -= min($length, strlen($etc));

        if (!$break_words && !$middle) {

            $string = preg_replace('/\s+?(\S+)?$/', '', substr($string, 0, $length + 1));

        }

        if (!$middle) {

            return substr($string, 0, $length) . $etc;

        }

        return substr($string, 0, $length / 2) . $etc . substr($string, -$length / 2);

    }

    return $string;

}