Source for file Crafty_Config.class.php

<?php
 
/**
 * Implementation file of the Crafty_Config class.
 *
 * <pre>
 * PROJECT    : Crafty
 *              Template Engine.
 * AUTHOR     : Crafty Team <crafty@zulan.net>
 * COPYRIGHT  : (c) Thomas Ilsche, 2004
 *
 * FILE       : [ROOT]\core\Crafty_Config.class.php
 * DESCRIPTION: Implementation file of the Crafty_Config class.
 * </pre>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
 *
 * @package     Crafty_Compiler
 * @author      Crafty Team <crafty@zulan.net>
 * @copyright   Copyright (c) Thomas Ilsche 2004
 * @version     1.0.0.2004.09.15
 * @link        http://crafty.zulan.net
 * @license     http://www.gnu.org/licenses/lgpl.html
 *               GNU Lesser General Public License Version 2.1
 ***/
 
/**
 * Crafty_Config class
 *
 * This class uses simplexml to parse the config xml file and features a
 * structured object tree similar to the xml structure.<br/>
 * Aswell it allows navigation in this tree by {@link $parent} and
 * {@link $top}
 *
 * @package     Crafty_Compiler
 * @author      Crafty Team <crafty@zulan.net>
 * @copyright   Copyright (c) Thomas Ilsche
 * @version     1.0.0.2004.09.15
 * @link        http://crafty.zulan.net
 * @license     http://www.gnu.org/licenses/lgpl.html
 *               GNU Lesser General Public License Version 2.1
 ***/
class Crafty_Config
{
 
     /**
     * Parent node object handle in the xml tree
     *
     * @var Crafty_Config 
     ***/
    public $parent;
 
    /**
     * Top node object handle in the xml tree
     *
     * @var Crafty_Config 
     ***/
    public $top;
 
    /**
     * Object handle of the compiler object
     *
     * @var Crafty_Compiler 
     ***/
    private $_compiler;
 
    /**
     * Initiates a Crafty_Config object and the corresponding object/XML tree
     *
     * When called for the first time this only needs the first parameter,
     * then it will recursively parse the XML tree and create a new Crafty_Config
     * objects for every XML tag.
     *
     * @param string           $xml 
     * @param Crafty_Compiler  $compiler  [optional,default=NULL]
     * @param Crafty_Config    $parent    [optional,default=NULL]
     * @param Crafty_Config    $top       [optional,default=NULL]
     ***/
    public function __construct($xml, $compiler = NULL, $parent = NULL, $top = NULL)
    {
        if (empty($xml)) {
            $xml = array();
        } elseif (is_string($xml)) {
            $xml = simplexml_load_file($xml);
        } elseif (!is_object($xml)) {
            throw new Crafty_Exception('Unknown error when reading the config.');
        }
 
        if ($parent == NULL) {
            $this->parent = NULL;
            $this->top = $this;
            if (!($compiler instanceof crafty_compiler)) {
                throw new Crafty_Exception('No crafty compiler handed over to top
                                            config.');
            }
        } elseif ($top == NULL) {
            $this->parent = $parent;
            $this->top = $parent;
        } else {
            $this->parent = $parent;
            $this->top = $top;
        }
 
        $this->_compiler = $compiler;
        foreach ($xml as $key => $value) {
            $value_str = (string)$value;
            /* We do not want the whitespace only non leaf tags in the object... */
            $value_str = preg_replace('/^\s+$/', '', $value_str);
            if (empty($value_str)) {
                $value = new Crafty_Config( $value, NULL , $this, $this->top);
            } else {
                $value = $value_str;
                $value = $this->top->_compiler->booleanize($value);
            }
            if (isset($this->$key)) {
                if (is_array($this->$key)) {
                    array_push($this->$key, $value);
                } else {
                    $this->$key = array($this->$key, $value);
                }
            }
            else {
                $this->$key = $value;
            }
        }
    }
}
?>