<?php if (!defined('STATUSNET')) exit(1);

/**
 * Group Redent Cleaner Plugin
 *
 * Stop redents to groups containing a group tag unless explicitly set using !!
 *
 * @category Plugin
 * @package  Statusnet
 * @author   Dave Hall @skwashd
 * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @version  VCS: $Id$
 */

class GroupRedentCleanerPlugin extends Plugin {

    protected $_redentPattern = '(RD @|RT @|♺ @)';

    public function __construct($redentPattern = null) {
        parent::__construct();
        if ( !is_null($redentPattern) ) {
            $this->_setRedentPattern($redentPattern);
        }
    }

    // Hook StartNoticeSave
    public function onStartNoticeSave($notice) {
        $this->_localReplace($notice);
    }

    protected function _localReplace($notice) {
        
        // check if this is a redent or not        
        if ( !preg_match("/{$this->_redentPattern}/i", $notice->content) ) {
            return;
        }

        $validNamePattern = '([A-Z0-9]{1,64})';
        $find = array("/(\s)!{$validNamePattern}/i", "/(\s)!!{$validNamePattern}/i");
        $replace = array('\\1#\\2', '\\1!\\2');

        $notice->content = preg_replace($find, $replace, $notice->content);
        $notice->rendered = common_render_content($notice->content, $notice);
    }


    protected function _setRedentPattern($pattern) {
        $this->_redentPattern = $pattern;
    }
}