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<?php
// set HTML Purifier
require_once WMP_PLUGIN_PATH . 'libs/htmlpurifier-4.6.0/library/HTMLPurifier.safe-includes.php';
require_once WMP_PLUGIN_PATH . 'libs/htmlpurifier-html5/htmlpurifier_html5.php';
if ( ! class_exists( 'WMobilePack_Formatter' ) ) {
/**
* Class WMobilePack_Formatter
*
* Contains different methods for formatting exported content
*/
class WMobilePack_Formatter
{
/**
*
* Init an HTMLPurifier object for filtering exported content and return it.
*
* @return HTMLPurifier
*
*/
public static function init_purifier()
{
$config = HTMLPurifier_Config::createDefault();
$config->set('Cache.DefinitionImpl', null); // disable cache
$config->set('Core.Encoding', 'UTF-8');
$config->set('HTML.AllowedElements', 'div,a,p,ol,li,ul,img,blockquote,em,span,h1,h2,h3,h4,h5,h6,i,u,strong,b,sup,br,cite,iframe,small,video,audio,source');
$config->set('HTML.AllowedAttributes', '*.style,*.width,*.height,*.src,a.href,a.target,iframe.frameborder,iframe.marginheight,iframe.marginwidth,iframe.scrolling,iframe.allowfullscreen,*.poster,*.preload,*.controls,*.type,*.data-type');
$config->set('Attr.AllowedFrameTargets', '_blank, _parent, _self, _top');
$config->set('URI.AllowedSchemes', array('http' => true, 'https' => true, 'mailto' => true, 'news' => true, 'tel' => true, 'callto' => true, 'skype' => true, 'sms' => true, 'whatsapp' => true));
$config->set('HTML.SafeIframe', 1);
$config->set('URI.SafeIframeRegexp', "%^(https?:)?(http?:)?//(www\.youtube(?:-nocookie)?\.com/embed/|player.vimeo.com|www\.dailymotion.com|w.soundcloud.com|fast.wistia.net|fast.wistia.com|wi.st|flickrit.com|www.spreaker.com|spreaker.com|instagram.com|www.instagram.com)%");
// extend purifier
$Html5Purifier = new WMPHtmlPurifier();
return $Html5Purifier->wmp_extended_purifier($config);
}
/**
*
* Format an article's or comment's date
*
* The date_i18n() method will translate months and days names if the locale files are found in the
* /wp-content/languages folder.
*
* @param $date_timestamp
*/
public static function format_date($date_timestamp)
{
if (date('Y') == date('Y', $date_timestamp))
return date_i18n('D, F d', $date_timestamp);
return date_i18n('F d, Y', $date_timestamp);
}
/**
*
* This method can truncate a string up to a number of characters while preserving whole words and HTML tags.
*
* @param string $text String to truncate.
* @param integer $length Length of returned string, including ellipsis.
* @param string $ending Ending to be appended to the trimmed string.
* @param boolean $exact If false, $text will not be cut mid-word
* @param boolean $considerHtml If true, HTML tags would be handled correctly
* @param boolean $stripTags If true, all the tags except some allowed tags will be removed
*
* @return string = Trimmed string.
*/
public static function truncate_html($text, $length = 200, $ending = '...', $exact = false, $considerHtml = true, $stripTags = true)
{
if ($considerHtml) {
// remove all unwanted script tags
$text = self::remove_script_tags($text);
// if no_images is true, remove all images from the content
if ($stripTags)
$text = strip_tags($text, '<p><a><span><br><i><u><strong><b><sup><em>');
// if the plain text is shorter than the maximum length, return the whole text
if (strlen(preg_replace('/<.*?>/', '', $text)) <= $length) {
return $text;
}
// splits all html-tags to scanable lines
preg_match_all('/(<.+?>)?([^<>]*)/s', $text, $lines, PREG_SET_ORDER);
$total_length = strlen($ending);
$open_tags = array();
$truncate = '';
foreach ($lines as $line_matchings) {
// if there is any html-tag in this line, handle it and add it (uncounted) to the output
if (!empty($line_matchings[1])) {
// if it's an "empty element" with or without xhtml-conform closing slash
if (preg_match('/^<(\s*.+?\/\s*|\s*(img|br|input|hr|area|base|basefont|col|frame|isindex|link|meta|param)(\s.+?)?)>$/is', $line_matchings[1])) {
// do nothing
// if tag is a closing tag
} else if (preg_match('/^<\s*\/([^\s]+?)\s*>$/s', $line_matchings[1], $tag_matchings)) {
// delete tag from $open_tags list
$pos = array_search($tag_matchings[1], $open_tags);
if ($pos !== false) {
unset($open_tags[$pos]);
}
// if tag is an opening tag
} else if (preg_match('/^<\s*([^\s>!]+).*?>$/s', $line_matchings[1], $tag_matchings)) {
// add tag to the beginning of $open_tags list
array_unshift($open_tags, strtolower($tag_matchings[1]));
}
// add html-tag to $truncate'd text
$truncate .= $line_matchings[1];
}
// calculate the length of the plain text part of the line; handle entities as one character
$content_length = strlen(preg_replace('/&[0-9a-z]{2,8};|&#[0-9]{1,7};|[0-9a-f]{1,6};/i', ' ', $line_matchings[2]));
if ($total_length + $content_length > $length) {
// the number of characters which are left
$left = $length - $total_length;
$entities_length = 0;
// search for html entities
if (preg_match_all('/&[0-9a-z]{2,8};|&#[0-9]{1,7};|[0-9a-f]{1,6};/i', $line_matchings[2], $entities, PREG_OFFSET_CAPTURE)) {
// calculate the real length of all entities in the legal range
foreach ($entities[0] as $entity) {
if ($entity[1] + 1 - $entities_length <= $left) {
$left--;
$entities_length += strlen($entity[0]);
} else {
// no more characters left
break;
}
}
}
$truncate .= substr($line_matchings[2], 0, $left + $entities_length);
// maximum length is reached, so get off the loop
break;
} else {
$truncate .= $line_matchings[2];
$total_length += $content_length;
}
// if the maximum length is reached, get off the loop
if ($total_length >= $length) {
break;
}
}
} else {
if (strlen($text) <= $length) {
return $text;
} else {
$truncate = substr($text, 0, $length - strlen($ending));
}
}
// if the words shouldn't be cut in the middle...
if (!$exact) {
// ...search the last occurance of a space...
$spacepos = strrpos($truncate, ' ');
if (isset($spacepos)) {
// ...and cut the text in this position
$truncate = substr($truncate, 0, $spacepos);
}
}
// add the defined ending to the text
$truncate .= $ending;
if ($considerHtml) {
// close all unclosed html-tags
foreach ($open_tags as $tag) {
$truncate .= '</' . $tag . '>';
}
}
return $truncate;
}
/**
* Method used to remove script tags and everything in between them
*
* @param $text
* @return string
*/
public static function remove_script_tags($text)
{
$text = preg_replace("/<\s*script[^>]*>[\s\S]*?(<\s*\/script[^>]*>|$)/i", " ", $text);
return $text;
}
}
}
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