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<?php
/**
* Basic Plugin Functions
*
* PHP version 5
*
* @category PHP
* @package PSI_Plugin
* @author Michael Cramer <BigMichi1@users.sourceforge.net>
* @copyright 2009 phpSysInfo
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License
* @version SVN: $Id: class.PSI_Plugin.inc.php 304 2009-07-18 12:15:12Z BigMichi1 $
* @link http://phpsysinfo.sourceforge.net
*/
/**
* basic functions to get a plugin working in phpSysinfo
* every plugin must implement this abstract class to be a valid plugin, main tasks
* of this class are reading the configuration file and check for the required files
* (*.js, lang/en.xml) to get everything working, if we have errors here we log them
* to our global error object
*
* @category PHP
* @package PSI_Plugin
* @author Michael Cramer <BigMichi1@users.sourceforge.net>
* @copyright 2009 phpSysInfo
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License
* @version Release: 3.0
* @link http://phpsysinfo.sourceforge.net
*/
abstract class PSI_Plugin implements PSI_Interface_Plugin
{
/**
* name of the plugin (classname)
*
* @var string
*/
private $_plugin_name = "";
/**
* full directory path of the plugin
*
* @var string
*/
private $_plugin_base = "";
/**
* global object for error handling
*
* @var Error
*/
protected $global_error = "";
/**
* xml tamplate with header
*
* @var SimpleXMLExtended
*/
protected $xml;
/**
* build the global Error object, read the configuration and check if all files are available
* for a minimalistic function of the plugin
*
* @param String $plugin_name name of the plugin
* @param String $enc target encoding
*
* @return void
*/
public function __construct($plugin_name, $enc)
{
$this->global_error = Error::Singleton();
if (trim($plugin_name) != "") {
$this->_plugin_name = $plugin_name;
$this->_plugin_base = APP_ROOT."/plugins/".$this->_plugin_name."/";
$this->_checkfiles();
$this->_getconfig();
} else {
$this->global_error->addError("__construct()", "Parent constructor called without Plugin-Name!");
}
$this->_createXml($enc);
}
/**
* read the plugin configuration file, if we have one in the plugin directory
*
* @return void
*/
private function _getconfig()
{
$filename = $this->_plugin_base.$this->_plugin_name.".config.php";
if (file_exists($filename)) {
if (is_readable($filename)) {
include_once $filename;
} else {
$this->global_error->addError("getconfig()", "Config-File for plugin ".$this->_plugin_name." exist but can't be read!");
}
}
}
/**
* check if there is a default translation file availabe and also the required js file for
* appending the content of the plugin to the main webpage
*
* @return void
*/
private function _checkfiles()
{
if (!file_exists($this->_plugin_base."js/".$this->_plugin_name.".js")) {
$this->global_error->addError("file_exists(".$this->_plugin_base."js/".$this->_plugin_name.".js)", "JS-File for Plugin '".$this->_plugin_name."' is missing!");
} else {
if (!is_readable($this->_plugin_base."js/".$this->_plugin_name.".js")) {
$this->global_error->addError("is_readable(".$this->_plugin_base."js/".$this->_plugin_name.".js)", "JS-File for Plugin '".$this->_plugin_name."' is not readable but present!");
}
}
if (!file_exists($this->_plugin_base."lang/en.xml")) {
$this->global_error->addError("file_exists(".$this->_plugin_base."lang/en.xml)", "At least an english translation must exist for the plugin!");
} else {
if (!is_readable($this->_plugin_base."lang/en.xml")) {
$this->global_error->addError("is_readable(".$this->_plugin_base."js/".$this->_plugin_name.".js)", "The english translation can't be read but is present!");
}
}
}
/**
* create the xml template where plugin information are added to
*
* @param String $enc target encoding
*
* @return Void
*/
private function _createXml($enc)
{
$dom = new DOMDocument('1.0', 'UTF-8');
$root = $dom->createElement("Plugin_".$this->_plugin_name);
$dom->appendChild($root);
$this->xml = new SimpleXMLExtended(simplexml_import_dom($dom), $enc);
}
}
?>