PARSER.php

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<?php
/*
 * Nucleus: PHP/MySQL Weblog CMS (http://nucleuscms.org/)
 * Copyright (C) 2002-2007 The Nucleus Group
 *
 * 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.
 * (see nucleus/documentation/index.html#license for more info)
 */
if ( !function_exists('requestVar') ) exit;
require_once dirname(__FILE__) . '/BaseActions.php';

class PARSER {

        // array with the names of all allowed actions
        var $actions;

        // reference to actions handler
        var $handler;

        // delimiters that can be used for skin/templatevars
        var $delim;

        // parameter delimiter (to separate skinvar params)
        var $pdelim;

        // usually set to 0. When set to 1, all skinvars are allowed regardless of $actions
        var $norestrictions;

        function PARSER($allowedActions, &$handler, $delim = '(<%|%>)', $pdelim = ',') {
                $this->actions = $allowedActions;
                $this->handler =& $handler;
                $this->delim = $delim;
                $this->pdelim = $pdelim;
                $this->norestrictions = 0;      // set this to 1 to disable checking for allowedActions
        }

        function parse(&$contents) {

                $pieces = preg_split('/'.$this->delim.'/',$contents);

                $maxidx = sizeof($pieces);
                for ($idx = 0; $idx < $maxidx; $idx++) {
                        echo $pieces[$idx];
                        $idx++;
                        if ($idx < $maxidx) {
                                $this->doAction($pieces[$idx]);
                        }
                }
        }


        function doAction($action) {
                global $manager;

                if (!$action) return;

                // split into action name + arguments
                if (strstr($action,'(')) {
                        $paramStartPos = strpos($action, '(');
                        $params = substr($action, $paramStartPos + 1, strlen($action) - $paramStartPos - 2);
                        $action = substr($action, 0, $paramStartPos);
                        $params = explode ($this->pdelim, $params);

                        // trim parameters
                        // for PHP versions lower than 4.0.6:
                        //   - add // before '$params = ...'
                        //   - remove // before 'foreach'
                        $params = array_map('trim',$params);
                        // foreach ($params as $key => $value) { $params[$key] = trim($value); }
                } else {
                        // no parameters
                        $params = array();
                }

                $actionlc = strtolower($action);

                // skip execution of skinvars while inside an if condition which hides this part of the page
                if (!$this->handler->if_currentlevel && ($actionlc != 'else') && ($actionlc != 'elseif') && ($actionlc != 'endif') && ($actionlc != 'ifnot') && ($actionlc != 'elseifnot') && (substr($actionlc,0,2) != 'if'))
                        return;

                if (in_array($actionlc, $this->actions) || $this->norestrictions ) {
                        // when using PHP versions lower than 4.0.5, uncomment the line before
                        // and comment the call_user_func_array call
                        //$this->call_using_array($action, $this->handler, $params);
                        call_user_func_array(array(&$this->handler,'parse_' . $actionlc), $params);
                } else {
                        // redirect to plugin action if possible
                        if (in_array('plugin', $this->actions) && $manager->pluginInstalled('NP_'.$action))
                                $this->doAction('plugin('.$action.$this->pdelim.implode($this->pdelim,$params).')');
                        else
                                echo '&lt;%' , $action , '(', implode($this->pdelim, $params), ')%&gt;';
                }

        }

        function call_using_array($methodname, &$handler, $paramarray) {

                $methodname = 'parse_' . $methodname;

                if (!method_exists($handler, $methodname)) {
                        return;
                }

                $command = 'call_user_func(array(&$handler,$methodname)';
                for ($i = 0; $i<count($paramarray); $i++)
                        $command .= ',$paramarray[' . $i . ']';
                $command .= ');';
                eval($command); // execute the correct method
        }

        function setProperty($property, $value) {
                global $manager;
                $manager->setParserProperty($property, $value);
        }

        function getProperty($name) {
                global $manager;
                return $manager->getParserProperty($name);
        }


}

?>

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