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<?php
/**
* $Id$
*
* Author: David Danier, david.danier@team23.de
* Project: Serverstats, http://serverstats.berlios.de/
* License: LGPL v2.1 or later (http://www.gnu.org/licenses/lgpl.html)
*
* Copyright (C) 2005 David Danier
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
class config implements ArrayAccess, IteratorAggregate
{
protected $dir;
protected $vars = array();
protected $rootConfig;
public function __construct($dir, $rootConfig = null)
{
$this->dir = $dir;
if (isset($rootConfig))
{
if ($rootConfig instanceof config)
{
$this->rootConfig = $rootConfig;
}
else
{
throw new Exception('Config: Param error');
}
}
else
{
$this->rootConfig = $this;
}
}
private function isOffsetValid($offset)
{
return preg_match('/^[a-zA-Z0-9_]+$/', $offset);
}
private function checkOffset($offset)
{
if (!$this->isOffsetValid($offset))
{
throw new Exception('Offset "' . $offset . '" is not allowed');
}
}
public function offsetExists($offset)
{
if (isset($this->vars[$offset]))
{
return true;
}
else
{
$this->checkOffset($offset);
if (is_readable($this->dir . $offset . '.php') || is_dir($this->dir . $offset))
{
return true;
}
else
{
return false;
}
}
}
protected static function loadConfig(&$config, $file, $rootConfig)
{
if (require_once($file))
{
if (isset($config))
{
return $config;
}
else
{
throw new Exception('Error while loading "' . $file . '" (Not a valid config?)');
}
}
else
{
throw new Exception('File "' . $file . '" could not be loaded');
}
}
protected function loadOffset($offset)
{
$this->checkOffset($offset);
if (is_readable($this->dir . $offset . '.php'))
{
$this->vars[$offset] = array();
self::loadConfig($this->vars[$offset], $this->dir . $offset . '.php', $this->rootConfig);
}
elseif (is_dir($this->dir . $offset))
{
$this->vars[$offset] = array();
}
else
{
throw new Exception('Offset "' . $offset . '" does not exist');
}
return $this->offsetGet($offset);
}
public function offsetGet($offset)
{
if (!isset($this->vars[$offset]))
{
$this->loadOffset($offset);
}
if (is_array($this->vars[$offset]))
{
$subconfig = new
config(
$this->dir . $offset . DIRECTORY_SEPARATOR,
$this->rootConfig);
$subconfig->vars = &$this->vars[$offset];
return $subconfig;
}
else
{
return $this->vars[$offset];
}
}
public function getIterator()
{
if (is_dir($this->dir))
{
$files = scandir($this->dir);
foreach ($files as $file)
{
if (preg_match('/^([a-zA-Z0-9_]+)(\.php)?$/', $file, $parts))
{
$offset = $parts[1];
if (!isset($this->vars[$offset]))
{
$this->loadOffset($offset);
}
}
}
}
$iteratorVars = array();
foreach (array_keys($this->vars) as $offset)
{
$iteratorVars[$offset] = $this->offsetGet($offset);
}
return new ArrayIterator($iteratorVars);
}
public function offsetSet($offset, $value)
{
throw new Exception('Config may not be changed');
}
public function offsetUnset($offset)
{
throw new Exception('Config may not be changed');
}
}
?>
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