<?
/**
 * Insert HTML editor button plugin for Joomla! file
 *   
 * @package Insert HTML editor button plugin for Joomla!
 * @author Francisco Rey Barcelo <mail@phoenixbits.com> 
 * @GNU General Public License   
 */ 

	// no direct access 
	defined('_JEXEC') or die('Restricted access');
	
	// register the handler
	$mainframe->registerEvent( 'onPrepareContent', 'plgInsertHTMLEditorButton' );

	function plgInsertHTMLEditorButton( &$row, &$params, $page )
	{
		global $mainframe;

		$pattern = '/\{HTML\}(.*?)\{\/HTML\}/i'; // match {HTML}...{/HTML} case no sensitive, execute php in string replace
		
		// Security
		$acl =& JFactory::getACL();
		if( $acl->getAroGroup($row->created_by)->id >= 23 || $acl->getAroGroup($row->modified_by)->id >= 23 )
			
			$row->text = preg_replace_callback( $pattern, 'IHEBP_decodehtmlspecialchars', $row->text );
	}

	function IHEBP_decodehtmlspecialchars( $match ) 
	{
		$match[1] = str_ireplace( "<br />", "\n", $match[1] );
		$match[1] = str_replace( array("&lt;","&gt;"), array("<",">"), $match[1] );
		$match[1] = str_replace( array("{apos}","{quot}","{amp}"), array("'","\"","&"), $match[1] );
		return $match[1];
	}