<?php

/**
* Class to parse a string (e.g. page content) that contains a Wiki
* item from the local wiki, and return the content inside the Chisimba
* page
*
* PHP version 5
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*
* @category  Chisimba
* @package   filters
* @author    Derek Keats <dkeats@uwc.ac.za>
* @copyright 2007 Derek Keats
* @license   http://www.gnu.org/licenses/gpl-2.0.txt The GNU General Public License
* @version   $Id$
* @link      http://avoir.uwc.ac.za
*/
// security check - must be included in all scripts
if (!
/**
 * Description for $GLOBALS
 * @global string $GLOBALS['kewl_entry_point_run']
 * @name   $kewl_entry_point_run
 */
$GLOBALS['kewl_entry_point_run'])
{
    die("You cannot view this page directly");
}
// end security check


/**
 *
 * Class to parse a string (e.g. page content) that contains a link
 * to a local Wiki page and render the desired content.
 *
 * @author Derek Keats
 *
 */

class parse4wiki extends object
{
    /**
    *
    * String to hold an error message
    * @accesss private
    */
    private $errorMessage;

    /**
     *
     * Constructor for the wikipedia parser
     *
     * @return void
     * @access public
     *
     */
    function init()
    {
        $this->objLanguage = $this->getObject('language', 'language');
        //Get an instance of the params extractor
        $this->objExpar = $this->getObject("extractparams", "utilities");
    }

    /**
     *
     * Method to parse the string
     * @param  String $str The string to parse
     * @return The parsed string
     *
     */
    public function parse($txt)
    {
        //Instantiate the modules class to check if youtube is registered
        $objModule = $this->getObject('modules','modulecatalogue');
        //See if the youtube API module is registered and set a param
        $isRegistered = $objModule->checkIfRegistered('wiki', 'wiki');
        if($isRegistered)
        {
            //Match filters based on a wordpress style
            preg_match_all('/\\[WIKI:(.*?)\\]/', $txt, $results, PREG_PATTERN_ORDER);
            //Get all the ones in links
            $counter = 0;
            //Get the wiki display object
            $objWiki = $this->newObject('wikidisplay', 'wiki');
            foreach ($results[0] as $item)
            {
                $str = $results[1][$counter];
                $ar= $this->objExpar->getArrayParams($str, ",");
                if (isset($this->objExpar->wiki)) {
                    $wiki = $this->objExpar->wiki;
                } else {
                    $wiki="Default wiki";
                }
                if (isset($this->objExpar->page)) {
                    $page = $this->objExpar->page;
                } else {
                    $page="MainPage";
                }
                $page = $objWiki->showPage($wiki, $page);
                $replacement = $page;
                $txt = str_replace($item, $replacement, $txt);
                $counter++;
            }
        }

        return $txt;
    }
}
?>