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<?php
/**
* Utilities for handling plugins
*
* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
* @author Andreas Gohr <andi@splitbrain.org>
*/
/**
* Returns a list of available plugins of given type
*
* Returns all plugins if no type given
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function plugin_list($type=''){
$plugins = array();
if ($dh = opendir(DOKU_PLUGIN)) {
while (false !== ($plugin = readdir($dh))) {
if ($plugin == '.' || $plugin == '..' || $plugin == 'tmp') continue;
if (is_file(DOKU_PLUGIN.$plugin)) continue;
if ($type=='' || @file_exists(DOKU_PLUGIN."$plugin/$type.php")){
$plugins[] = $plugin;
} else {
if ($dp = @opendir(DOKU_PLUGIN."$plugin/$type/")) {
while (false !== ($component = readdir($dp))) {
if ($component == '.' || $component == '..' || strtolower(substr($component, -4)) != ".php") continue;
if (is_file(DOKU_PLUGIN."$plugin/$type/$component")) {
$plugins[] = $plugin.'_'.substr($component, 0, -4);
}
}
closedir($dp);
}
}
}
closedir($dh);
}
return $plugins;
}
/**
* Loads the given plugin and creates an object of it
*
* @author Andreas Gohr <andi@splitbrain.org>
*
* @param $type string type of plugin to load
* @param $name string name of the plugin to load
* @return objectreference the plugin object or null on failure
*/
function &plugin_load($type,$name){
//we keep all loaded plugins available in global scope for reuse
global $DOKU_PLUGINS;
//plugin already loaded?
if($DOKU_PLUGINS[$type][$name] != null){
return $DOKU_PLUGINS[$type][$name];
}
//try to load the wanted plugin file
if (file_exists(DOKU_PLUGIN."$name/$type.php")){
include_once(DOKU_PLUGIN."$name/$type.php");
}else{
list($plugin, $component) = preg_split("/_/",$name, 2);
if (!$component || !include_once(DOKU_PLUGIN."$plugin/$type/$component.php")) {
return null;
}
}
//construct class and instanciate
$class = $type.'_plugin_'.$name;
if (!class_exists($class)) return null;
$DOKU_PLUGINS[$type][$name] = new $class;
return $DOKU_PLUGINS[$type][$name];
}
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