Your IP : 216.73.216.158
<?php
/**
* @package Articles Anywhere
* @version 6.3.0
*
* @author Peter van Westen <info@regularlabs.com>
* @link http://www.regularlabs.com
* @copyright Copyright © 2017 Regular Labs All Rights Reserved
* @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
*/
namespace RegularLabs\Plugin\System\ArticlesAnywhere;
defined('_JEXEC') or die;
use RegularLabs\Library\RegEx as RL_RegEx;
class Text
{
var $helpers = [];
var $params = null;
public static function process($string, $data)
{
if (isset($data->strip))
{
return self::strip($string, $data);
}
if (isset($data->noimages))
{
// remove images
$string = RL_RegEx::replace(
'(<p><img\s.*?></p>|<img\s.*?>)',
' ',
$string
);
}
if (empty($data->limit) && empty($data->words) && empty($data->paragraphs))
{
return $string;
}
if (strpos($string, '<') === false || strpos($string, '>') === false)
{
// No html tags found. Do a simple limit.
return self::limit($string, $data);
}
return self::limitHtml($string, $data);
}
private static function limitHtml($string, $data)
{
if (empty($data->limit) && empty($data->words) && empty($data->paragraphs))
{
return $string;
}
if ( ! empty($data->paragraphs))
{
return self::limitHtmlParagraphs($string, (int) $data->paragraphs);
}
if ( ! empty($data->words))
{
return self::limitHtmlWords($string, (int) $data->words);
}
return self::limitHtmlLetters($string, (int) $data->limit);
}
private static function limitHtmlParagraphs($string, $limit)
{
if ( ! RL_RegEx::match('^' . str_repeat('.*?</p>', $limit), $string, $match))
{
return $string;
}
return $match['0'];
}
private static function limitHtmlWords($string, $limit)
{
return self::limitHtmlByType($string, $limit, 'words');
}
private static function limitHtmlLetters($string, $limit)
{
return self::limitHtmlByType($string, $limit);
}
private static function limitHtmlByType($string, $limit, $type = 'letters')
{
if (strlen($string) < $limit)
{
return $string;
}
// store pagenavcounter & pagenav (exclude from count)
$pagenavcounter = '';
if (strpos($string, 'pagenavcounter') !== false)
{
if (RL_RegEx::match('<div class="pagenavcounter">.*?</div>', $string, $pagenavcounter))
{
$pagenavcounter = $pagenavcounter['0'];
$string = str_replace($pagenavcounter, '<!-- ARTA_PAGENAVCOUNTER -->', $string);
}
}
$pagenavbar = '';
if (strpos($string, 'pagenavbar') !== false)
{
if (RL_RegEx::match('<div class="pagenavbar">(<div>.*?</div>)*</div>', $string, $pagenavbar))
{
$pagenavbar = $pagenavbar['0'];
$string = str_replace($pagenavbar, '<!-- ARTA_PAGENAV -->', $string);
}
}
// add explode helper strings around tags
$explode_str = '<!-- ARTA_TAG -->';
$string = RL_RegEx::replace(
'(<\/?[a-z][a-z0-9]?.*?>|<!--.*?-->)',
$explode_str . '\1' . $explode_str,
$string
);
$str_array = explode($explode_str, $string);
$string = [];
$tags = [];
$count = 0;
$is_script = 0;
foreach ($str_array as $i => $str_part)
{
if (fmod($i, 2))
{
// is tag
$string[] = $str_part;
RL_RegEx::match(
'^<(\/?([a-z][a-z0-9]*))',
$str_part,
$tag
);
if ( ! empty($tag))
{
if ($tag['1'] == 'script')
{
$is_script = 1;
}
if ( ! $is_script
// only if tag is not a single html tag
&& (strpos($str_part, '/>') === false)
// just in case single html tag has no closing character
&& ! in_array($tag['2'], ['area', 'br', 'hr', 'img', 'input', 'link', 'param'])
)
{
$tags[] = $tag['1'];
}
if ($tag['1'] == '/script')
{
$is_script = 0;
}
}
continue;
}
if ($is_script)
{
$string[] = $str_part;
continue;
}
if ($type == 'words')
{
// word limit
if ($str_part)
{
$words = explode(' ', trim($str_part));
$word_count = count($words);
if ($limit < ($count + $word_count))
{
$words_part = [];
$word_count = 0;
foreach ($words as $word)
{
if ($word)
{
$word_count++;
}
if ($limit < ($count + $word_count))
{
break;
}
$words_part[] = $word;
}
$string_part = rtrim(implode(' ', $words_part));
$string[] = self::addEllipsis($string_part);
break;
}
$count += $word_count;
}
$string[] = $str_part;
continue;
}
// character limit
if ($limit < ($count + strlen($str_part)))
{
// strpart has to be cut off
$maxlen = $limit - $count;
if ($maxlen < 3)
{
$string_part = '';
if (RL_RegEx::match('[^a-z0-9]$', $str_part))
{
$string_part .= ' ';
}
$string[] = self::addEllipsis($string_part);
break;
}
$string[] = self::shorten($str_part, $limit);
break;
}
$count += strlen($str_part);
$string[] = $str_part;
}
// revers sort open tags
krsort($tags);
$tags = array_values($tags);
$count = count($tags);
for ($i = 0; $i < 3; $i++)
{
foreach ($tags as $ti => $tag)
{
if ($tag['0'] != '/')
{
continue;
}
for ($oi = $ti + 1; $oi < $count; $oi++)
{
if ( ! isset($tags[$oi]))
{
unset($tags[$ti]);
break;
}
$opentag = $tags[$oi];
if ($opentag == $tag)
{
break;
}
if ('/' . $opentag == $tag)
{
unset($tags[$ti]);
unset($tags[$oi]);
break;
}
}
}
}
foreach ($tags as $tag)
{
// add closing tag to end of string
if ($tag['0'] != '/')
{
$string[] = '</' . $tag . '>';
}
}
$string = implode('', $string);
if ($pagenavcounter)
{
$string = str_replace('<!-- ARTA_PAGENAVCOUNTER -->', $pagenavcounter, $string);
}
if ($pagenavbar)
{
$string = str_replace('<!-- ARTA_PAGENAV -->', $pagenavbar, $string);
}
return $string;
}
private static function strip($string, $data)
{
// remove pagenavcounter
$string = RL_RegEx::replace('(<div class="pagenavcounter">.*?</div>)', ' ', $string);
// remove pagenavbar
$string = RL_RegEx::replace('(<div class="pagenavbar">(<div>.*?</div>)*</div>)', ' ', $string);
// remove inline scripts
$string = RL_RegEx::replace('(<script[^a-z0-9].*?</script>)', ' ', $string);
$string = RL_RegEx::replace('(<noscript[^a-z0-9].*?</noscript>)', ' ', $string);
// remove inline styles
$string = RL_RegEx::replace('(<style[^a-z0-9].*?</style>)', ' ', $string);
// remove other tags
$string = RL_RegEx::replace('(</?[a-z][a-z0-9]?.*?>)', ' ', $string);
// remove double whitespace
$string = trim(RL_RegEx::replace('(\s)[ ]+', '\1', $string));
return self::limit($string, $data);
}
private static function limit($string, $data)
{
if (empty($data->limit) && empty($data->words))
{
return $string;
}
if ( ! empty($data->words))
{
return self::limitWords($string, (int) $data->words);
}
return self::limitLetters($string, (int) $data->limit);
}
private static function limitWords($string, $limit)
{
$orig_len = strlen($string);
// word limit
$string = trim(
RL_RegEx::replace(
'^(([^\s]+\s*){' . (int) $limit . '}).*$',
'\1',
$string
)
);
if (strlen($string) < $orig_len)
{
$string = self::addEllipsis($string);
}
return $string;
}
private static function limitLetters($string, $limit)
{
$orig_len = strlen($string);
// character limit
if ($limit >= $orig_len)
{
return $string;
}
return self::shorten($string, $limit);
}
private static function shorten($string, $limit)
{
if (strlen($string) <= $limit)
{
return $string;
}
$string = self::rtrim($string, $limit);
return self::addEllipsis($string);
}
private static function rtrim($string, $limit)
{
if (function_exists('mb_substr'))
{
return rtrim(mb_substr($string, 0, ($limit - 3), 'utf-8'));
}
return rtrim(substr($string, 0, ($limit - 3)));
}
private static function addEllipsis($string)
{
if ( ! Params::get()->use_ellipsis)
{
return $string;
}
if (RL_RegEx::match('[^a-z0-9]$', $string))
{
$string .= ' ';
}
return $string . '...';
}
}