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<?php
/**
* @copyright 2006-2014, Miles Johnson - http://milesj.me
* @license https://github.com/milesj/decoda/blob/master/license.md
* @link http://milesj.me/code/php/decoda
*/
namespace Decoda\Hook;
/**
* Caches [code] blocks so that the inner content doesn't get processed.
*/
class CodeHook extends AbstractHook {
/**
* Cached code blocks during the parsing process.
*
* @var array
*/
protected $_cache = array();
/**
* Cache code blocks before parsing. It use regexp (?R) recursivity mask to deal with other nested code tags
* see http://php.net/manual/en/regexp.reference.recursive.php and http://stackoverflow.com/questions/2909588/regex-bbcode-perfecting-nested-quote#answer-2909930 for more informations
*
* @param string $string
* @return mixed
*/
public function beforeParse($string) {
$this->_cache = array();
return preg_replace_callback('/\[code(.*?)\](((?R)|.)*?)\[\/code\]/is', array($this, '_encodeCallback'), $string);
}
/**
* Retrieve code blocks after parsing.
*
* @param string $string
* @return mixed
*/
public function afterParse($string) {
$string = preg_replace_callback('/\<pre(.*?)><code>(\$\$CODE(\d+)\$\$)<\/code>\<\/pre>/is', array($this, '_decodeCallback'), $string);
$this->_cache = array();
return $string;
}
/**
* Encode content using base64.
*
* @param array $matches
* @return string
*/
protected function _encodeCallback(array $matches) {
$cacheSize = count($this->_cache);
$this->_cache[$cacheSize] = $matches[2];
return '[code' . $matches[1] . ']$$CODE' . $cacheSize . '$$[/code]';
}
/**
* Decode content using base64.
*
* @param array $matches
* @return string
*/
protected function _decodeCallback(array $matches) {
return '<pre' . $matches[1] . '><code>' . $this->_cache[$matches[3]] . '</code></pre>';
}
}
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