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<?php
namespace Bitweaver\Rss;
/**
* @package rss
* An FeedHtmlField describes and generates
* a feed, item or image html field (probably a description). Output is
* generated based on $truncSize, $syndicateHtml properties.
* @author Pascal Van Hecke <feedcreator.class.php@vanhecke.info>
* @version 1.6
*/
class FeedHtmlField {
/**
* Mandatory attributes of a FeedHtmlField.
*/
public $rawFieldContent;
/**
* Optional attributes of a FeedHtmlField.
*
*/
public $truncSize;
public $syndicateHtml;
/**
* Creates a new instance of FeedHtmlField.
* @param $string: if given, sets the rawFieldContent property
*/
public function __construct($parFieldContent) {
if ($parFieldContent) {
$this->rawFieldContent = $parFieldContent;
}
}
/**
* Creates the right output, depending on $truncSize, $syndicateHtml properties.
* @return string the formatted field
*/
public function output() {
// when field available and syndicated in html we assume
// - valid html in $rawFieldContent and we enclose in CDATA tags
// - no truncation (truncating risks producing invalid html)
if (!$this->rawFieldContent) {
$result = "";
} elseif ($this->syndicateHtml) {
// Clean HTML before wrapping in CDATA
$cleaned = $this->sanitizeHtml( $this->rawFieldContent );
$result = "<![CDATA[$cleaned]]>";
} else {
$result = ( $this->truncSize and is_int( $this->truncSize ) ) ? FeedCreator::iTrunc( htmlspecialchars( $this->rawFieldContent ), $this->truncSize ) : htmlspecialchars( $this->rawFieldContent );
}
return $result;
}
/**
* Sanitize HTML for RSS syndication - keep content, strip Bootstrap wrappers
*/
private function sanitizeHtml( $html ) {
// Remove Bootstrap wrapper divs
$html = preg_replace( '/<div[^>]*class="(container|row|col-[^"]*)"[^>]*>/', '', $html );
$html = preg_replace( '/<\/div>/', '', $html );
// Keep formatting, images, links; strip everything else
return preg_replace(
'/\s+/',
' ',
strip_tags( $html, '<p><br><img><strong><em><a><blockquote><ul><ol><li>' ),
);
}
}
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