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<?php

# ***** BEGIN LICENSE BLOCK *****

# This file is part of DotClear.

# Copyright (c) 2004 Olivier Meunier and contributors. All rights

# reserved.

#

# DotClear 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.

#

# DotClear 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 DotClear; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#

# ***** END LICENSE BLOCK *****

/*

Classe de gestion des plugins et des thèmes

*/

class plugins

{

	var $location;

	var $type;

	var $_xml;

	var $p_list = array();

	function plugins($location,$type='plugin')

	{

		if (is_dir($location)) {

			$this->location = $location.'/';

		} else {

			$this->location = NULL;

		}

		$this->type = $type;

	}

	function getPlugins($active_only=true)

	{

		if (($list_files = $this->_readDir()) !== false)

		{

			$this->p_list = array();

			foreach ($list_files as $entry => $pfile)

			{

				if (($info = $this->_getPluginInfo($pfile)) !== false) {

					if (($active_only && $info['active']) || !$active_only) {

						$this->p_list[$entry] = $info;

					}

				}

			}

			ksort($this->p_list);

			return true;

		}

		else

		{

			return false;

		}

	}

	function getPluginsList()

	{

		return $this->p_list;

	}

	function getFunctions($f='functions.php')

	{

		$res = array();

		if (($list_files = $this->_readDir()) !== false)

		{

			foreach ($list_files as $entry => $pfile)

			{

				if (file_exists(dirname($pfile).'/'.$f)) {

					$res[] = dirname($pfile).'/'.$f;

				}

			}

		}

		return $res;

	}

	function loadCallbacks()

	{

		$res['onPost'] = array();

		$ires = array_keys($res);

		foreach ($this->p_list as $k => $v)

		{

			# Chargement des fichiers events.php

			if (file_exists($this->location.$k.'/events.php'))

			{

				require_once $this->location.$k.'/events.php';

				foreach ($v['callbacks'] as $f)

				{

					if (in_array($f[0],$ires))

					{

						$pf = explode('::',$f[1]);

						if (count($pf) == 2 && is_callable($pf)) {

							$res[$f[0]][] = $pf;

						}

					}

				}

			}

		}

		return $res;

	}

	function loadl10n($p)

	{

		if (defined('DC_LANG')) {

			if (dc_encoding == 'UTF-8') {

				l10n::set($this->location.$p.'/l10n/'.DC_LANG.'-utf8/main');

			} else {

				l10n::set($this->location.$p.'/l10n/'.DC_LANG.'/main');

			}

		}

	}

	function switchStatus($p)

	{

		$xml_path = $this->location.$p.'/desc.xml';

		$p_info = $this->_getPluginInfo($xml_path);

		$xml = implode('',file($xml_path));

		$active = (integer) !$p_info['active'];

		$xml = preg_replace('|(<'.$this->type.'[^>]*?active=)"([^"]+)([^>]*>)|ms',

			'$1"'.$active.'$3',$xml);

		if (!files::putContent($xml_path,$xml)) {

			return false;

		}

		return true;

	}

	/* Installation d'un plugin */

	function install($url)

	{

		$dest = $this->location.'/'.basename($url);

	    if  ((!file_exists($dest)) && ($err = files::copyRemote($url,$dest) !== true)) {

             return $err;

        }

		else

		{

			if (($content = @implode('',@gzfile($dest))) === false) {

				return __('Cannot open file');

			} else {

				if (($list = unserialize($content)) === false)

				{

					return __('Plugin not valid');

				}

				else

				{

					if (is_dir($this->location.'/'.$list['name']))

					{

						/*if (files::deltree($this->location.'/'.$list['name']) === false)

						{

							return 'Impossible de supprimer le plugin existant';

						}*/

						unlink($dest);

						return __('This plugin still exists. Delete it before.');

					}

					foreach ($list['dirs'] as $d)

					{

						mkdir ($this->location.'/'.$d,fileperms($this->location));

						chmod($this->location.'/'.$d,fileperms($this->location));

					}

					foreach ($list['files'] as $f => $v)

					{

						$v = base64_decode($v);

						$fp = fopen($this->location.'/'.$f,'w');

						fwrite($fp,$v,strlen($v));

						fclose($fp);

						chmod($this->location.'/'.$f,fileperms($this->location) & ~0111);

					}

					unlink($dest);

				}

			}

		}

		return true;

	}

	/* Lecture d'un répertoire à la recherche des desc.xml */

	function _readDir()

	{

		if ($this->location === NULL) {

			return false;

		}

		$res = array();

		$d = dir($this->location);

		# Liste du répertoire des plugins

		while (($entry = $d->read()) !== false)

		{

			if ($entry != '.' && $entry != '..' &&

			is_dir($this->location.$entry) && file_exists($this->location.$entry.'/desc.xml'))

			{

				$res[$entry] = $this->location.$entry.'/desc.xml';

			}

		}

		return $res;

	}

	function _getPluginInfo($p)

	{

		if (file_exists($p))

		{

			$this->_current_tag_cdata = '';

			$this->_p_info = array('name'=>NULL,'version'=>NULL,

						'active'=>NULL,'author'=>NULL,'label'=>NULL,

						'desc'=>NULL,'callbacks'=>array());

			$this->_xml = xml_parser_create('ISO-8859-1');

			xml_parser_set_option($this->_xml, XML_OPTION_CASE_FOLDING, false);

			xml_set_object($this->_xml, $this);

			xml_set_element_handler($this->_xml,'_openTag','_closeTag');

			xml_set_character_data_handler($this->_xml, '_cdata');

			xml_parse($this->_xml,implode('',file($p)));

			xml_parser_free($this->_xml);

			if (!empty($this->_p_info['name'])) {

				return $this->_p_info;

			} else {

				return false;

			}

		}

	}

	function _openTag($p,$tag,$attr)

	{

		if ($tag == $this->type && !empty($attr['name']))

		{

			$this->_p_info['name'] = $attr['name'];

			$this->_p_info['version'] = (!empty($attr['version'])) ? $attr['version'] : NULL;

			$this->_p_info['active'] = (!empty($attr['active'])) ? (boolean) $attr['active'] : false;

		}

		if ($tag == 'callback') {

			$this->_p_info['callbacks'][] = array($attr['event'],$attr['function']);

		}

	}

	function _closeTag($p,$tag)

	{

		switch ($tag)

		{

			case 'author':

			case 'label':

			case 'desc':

				$this->_p_info[$tag] = $this->_current_tag_cdata;

				break;

		}

	}

	function _cdata($p,$cdata)

	{

		$this->_current_tag_cdata = $cdata;

	}

}

?>