WB 2.11.0

<?php

/**

 *

 * @category        module

 * @package         droplets

 * @author          Ruud Eisinga (Ruud) John (PCWacht)

 * @author          WebsiteBaker Project

 * @copyright       2004-2009, Ryan Djurovich

 * @copyright       2009-2011, Website Baker Org. e.V.

 * @link            http://www.websitebaker2.org/

 * @license         http://www.gnu.org/licenses/gpl.html

 * @platform        WebsiteBaker 2.8.x

 * @requirements    PHP 5.2.2 and higher

 * @version         $Id$

 * @filesource      $HeadURL$

 * @lastmodified    $Date$

 *

 *    droplets are small codeblocks that are called from anywhere in the template.

 *     To call a droplet just use [[dropletname]]. optional parameters for a droplet can be used like [[dropletname?parameter=value&parameter2=value]]\

 *

 *  1.0.2, bugfix, Reused the evalDroplet function so the extracted parameters will be only available within the scope of the eval and cleared when ready.

 *  1.0.3, optimize, reduce memory consumption, increase speed, remove CSS, enable nested droplets

 *

 */

/* -------------------------------------------------------- */

// Must include code to stop this file being accessed directly

if(!defined('WB_PATH')) {

    require_once(dirname(dirname(dirname(__FILE__))).'/framework/globalExceptionHandler.php');

    throw new IllegalFileException();

}

/* -------------------------------------------------------- */

    function do_eval($_x_codedata, $_x_varlist, &$wb_page_data)

    {

        extract($_x_varlist, EXTR_SKIP);

        return(eval($_x_codedata));

    }

    function processDroplets( &$wb_page_data ) {

// collect all droplets from document

        $droplet_tags = array();

        $droplet_replacements = array();

        $droplet_search = '\[\[(.*?)\]\]'; // \[\[(\S*?)\]\]

        if( preg_match_all( '/'.$droplet_search.'/', $wb_page_data, $found_droplets ) )

        {

            foreach( $found_droplets[1] as $droplet )

            {

                if(array_key_exists( '[['.$droplet.']]', $droplet_tags) == false)

                {

// go in if same droplet with same arguments is not processed already

                    $varlist = array();

// split each droplet command into droplet_name and request_string

                    $tmp = preg_split('/\?/', $droplet, 2);

                    $droplet_name = $tmp[0];

                    $request_string = (isset($tmp[1]) ? $tmp[1] : '');

                    if( $request_string != '' )

                    {

// make sure we can parse the arguments correctly

                        $request_string = html_entity_decode($request_string, ENT_COMPAT,DEFAULT_CHARSET);

// create array of arguments from query_string

                        $argv = preg_split( '/&(?!amp;)/', $request_string );

                        foreach ($argv as $argument)

                        {

// split argument in pair of varname, value

                            list( $variable, $value ) = explode('=', $argument,2);

                            if( !empty($value) )

                            {

// re-encode the value and push the var into varlist

                                $varlist[$variable] = htmlentities($value, ENT_COMPAT,DEFAULT_CHARSET);

                            }

                        }

                    }

                    else

                    {

// no arguments given, so

                        $droplet_name = $droplet;

                    }

// request the droplet code from database

                    $sql  = 'SELECT `code` FROM `'.TABLE_PREFIX.'mod_droplets` '

                          . 'WHERE `name` LIKE \''.$droplet_name.'\''

                          .   'AND `active` = 1';

                    $codedata = $GLOBALS['database']->get_one($sql);

                    if (!is_null($codedata))

                    {

                        $newvalue = do_eval($codedata, $varlist, $wb_page_data);

// check returnvalue (must be a string of 1 char at least or (bool)true

                        if ($newvalue == '' && $newvalue !== true)

                        {

                            if(DEBUG === true)

                            {

                                $newvalue = '<span class="mod_droplets_err">Error in: '.$droplet.', no valid returnvalue.</span>';

                            } else {

                                $newvalue = true;

                            }

                        }

                        if ($newvalue === true) { $newvalue = ""; }

// remove any defined CSS section from code. For valid XHTML a CSS-section is allowed inside <head>...</head> only!

                        $newvalue = preg_replace('/<style.*>.*<\/style>/siU', '', $newvalue);

// push droplet-tag and it's replacement into Search/Replace array after executing only

                        $droplet_tags[]         = '[['.$droplet.']]';

                        $droplet_replacements[] = $newvalue;

                    }

                }

            }    // End foreach( $found_droplets[1] as $droplet )

// replace each Droplet-Tag with coresponding $newvalue

            $wb_page_data = str_replace($droplet_tags, $droplet_replacements, $wb_page_data);

        }

// returns TRUE if droplets found in content, FALSE if not

        return( count($droplet_tags)!=0 );

    }

    function evalDroplets( &$wb_page_data, $max_loops = 3 ) {

        $max_loops = ((int)$max_loops = 0 ? 3 : (int)$max_loops);

        while( (processDroplets($wb_page_data) == true) && ($max_loops > 0))

        {

            $max_loops--;

        }

        return $wb_page_data;

    }