348 lines
13 KiB
PHP
348 lines
13 KiB
PHP
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<?php
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/**
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* Class to encapsulate access to dokuwiki plugins
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*
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* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
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* @author Christopher Smith <chris@jalakai.co.uk>
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*/
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// plugin related constants
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if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
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class Doku_Plugin_Controller {
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protected $list_bytype = array();
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protected $tmp_plugins = array();
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protected $plugin_cascade = array('default'=>array(),'local'=>array(),'protected'=>array());
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protected $last_local_config_file = '';
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/**
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* Populates the master list of plugins
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*/
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public function __construct() {
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$this->loadConfig();
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$this->_populateMasterList();
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}
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/**
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* Returns a list of available plugins of given type
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*
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* @param $type string, plugin_type name;
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* the type of plugin to return,
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* use empty string for all types
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* @param $all bool;
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* false to only return enabled plugins,
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* true to return both enabled and disabled plugins
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*
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* @return array of
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* - plugin names when $type = ''
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* - or plugin component names when a $type is given
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*/
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public function getList($type='',$all=false){
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// request the complete list
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if (!$type) {
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return $all ? array_keys($this->tmp_plugins) : array_keys(array_filter($this->tmp_plugins));
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}
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if (!isset($this->list_bytype[$type]['enabled'])) {
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$this->list_bytype[$type]['enabled'] = $this->_getListByType($type,true);
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}
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if ($all && !isset($this->list_bytype[$type]['disabled'])) {
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$this->list_bytype[$type]['disabled'] = $this->_getListByType($type,false);
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}
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return $all ? array_merge($this->list_bytype[$type]['enabled'],$this->list_bytype[$type]['disabled']) : $this->list_bytype[$type]['enabled'];
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}
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/**
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* Loads the given plugin and creates an object of it
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*
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* @param $type string type of plugin to load
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* @param $name string name of the plugin to load
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* @param $new bool true to return a new instance of the plugin, false to use an already loaded instance
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* @param $disabled bool true to load even disabled plugins
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* @return DokuWiki_Plugin|DokuWiki_Syntax_Plugin|DokuWiki_Auth_Plugin|DokuWiki_Admin_Plugin|DokuWiki_Action_Plugin|DokuWiki_Remote_Plugin|null the plugin object or null on failure
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*/
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public function load($type,$name,$new=false,$disabled=false){
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//we keep all loaded plugins available in global scope for reuse
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global $DOKU_PLUGINS;
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list($plugin, /* $component */) = $this->_splitName($name);
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// check if disabled
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if(!$disabled && $this->isdisabled($plugin)){
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return null;
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}
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$class = $type.'_plugin_'.$name;
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//plugin already loaded?
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if(!empty($DOKU_PLUGINS[$type][$name])){
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if ($new || !$DOKU_PLUGINS[$type][$name]->isSingleton()) {
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return class_exists($class, true) ? new $class : null;
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} else {
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return $DOKU_PLUGINS[$type][$name];
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}
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}
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//construct class and instantiate
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if (!class_exists($class, true)) {
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# the plugin might be in the wrong directory
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$dir = $this->get_directory($plugin);
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$inf = confToHash(DOKU_PLUGIN."$dir/plugin.info.txt");
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if($inf['base'] && $inf['base'] != $plugin){
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msg(sprintf("Plugin installed incorrectly. Rename plugin directory '%s' to '%s'.", hsc($plugin), hsc($inf['base'])), -1);
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} elseif (preg_match('/^'.DOKU_PLUGIN_NAME_REGEX.'$/', $plugin) !== 1) {
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msg(sprintf("Plugin name '%s' is not a valid plugin name, only the characters a-z and 0-9 are allowed. ".
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'Maybe the plugin has been installed in the wrong directory?', hsc($plugin)), -1);
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}
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return null;
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}
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$DOKU_PLUGINS[$type][$name] = new $class;
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return $DOKU_PLUGINS[$type][$name];
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}
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/**
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* Whether plugin is disabled
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*
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* @param string $plugin name of plugin
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* @return bool true disabled, false enabled
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*/
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public function isdisabled($plugin) {
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return empty($this->tmp_plugins[$plugin]);
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}
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/**
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* Disable the plugin
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*
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* @param string $plugin name of plugin
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* @return bool true saving succeed, false saving failed
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*/
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public function disable($plugin) {
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if(array_key_exists($plugin,$this->plugin_cascade['protected'])) return false;
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$this->tmp_plugins[$plugin] = 0;
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return $this->saveList();
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}
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/**
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* Enable the plugin
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*
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* @param string $plugin name of plugin
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* @return bool true saving succeed, false saving failed
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*/
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public function enable($plugin) {
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if(array_key_exists($plugin,$this->plugin_cascade['protected'])) return false;
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$this->tmp_plugins[$plugin] = 1;
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return $this->saveList();
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}
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/**
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* Returns directory name of plugin
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*
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* @param string $plugin name of plugin
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* @return string name of directory
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*/
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public function get_directory($plugin) {
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return $plugin;
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}
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/**
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* Returns cascade of the config files
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*
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* @return array with arrays of plugin configs
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*/
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public function getCascade() {
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return $this->plugin_cascade;
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}
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protected function _populateMasterList() {
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global $conf;
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if ($dh = @opendir(DOKU_PLUGIN)) {
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$all_plugins = array();
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while (false !== ($plugin = readdir($dh))) {
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if ($plugin[0] == '.') continue; // skip hidden entries
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if (is_file(DOKU_PLUGIN.$plugin)) continue; // skip files, we're only interested in directories
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if (array_key_exists($plugin,$this->tmp_plugins) && $this->tmp_plugins[$plugin] == 0){
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$all_plugins[$plugin] = 0;
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} elseif ((array_key_exists($plugin,$this->tmp_plugins) && $this->tmp_plugins[$plugin] == 1)) {
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$all_plugins[$plugin] = 1;
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} else {
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$all_plugins[$plugin] = 1;
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}
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}
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$this->tmp_plugins = $all_plugins;
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if (!file_exists($this->last_local_config_file)) {
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$this->saveList(true);
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}
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}
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}
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/**
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* Includes the plugin config $files
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* and returns the entries of the $plugins array set in these files
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*
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* @param array $files list of files to include, latter overrides previous
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* @return array with entries of the $plugins arrays of the included files
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*/
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protected function checkRequire($files) {
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$plugins = array();
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foreach($files as $file) {
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if(file_exists($file)) {
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include_once($file);
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}
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}
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return $plugins;
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}
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/**
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* Save the current list of plugins
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*
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* @param bool $forceSave;
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* false to save only when config changed
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* true to always save
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* @return bool true saving succeed, false saving failed
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*/
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protected function saveList($forceSave = false) {
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global $conf;
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if (empty($this->tmp_plugins)) return false;
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// Rebuild list of local settings
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$local_plugins = $this->rebuildLocal();
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if($local_plugins != $this->plugin_cascade['local'] || $forceSave) {
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$file = $this->last_local_config_file;
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$out = "<?php\n/*\n * Local plugin enable/disable settings\n * Auto-generated through plugin/extension manager\n *\n".
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" * NOTE: Plugins will not be added to this file unless there is a need to override a default setting. Plugins are\n".
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" * enabled by default.\n */\n";
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foreach ($local_plugins as $plugin => $value) {
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$out .= "\$plugins['$plugin'] = $value;\n";
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}
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// backup current file (remove any existing backup)
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if (file_exists($file)) {
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$backup = $file.'.bak';
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if (file_exists($backup)) @unlink($backup);
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if (!@copy($file,$backup)) return false;
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if (!empty($conf['fperm'])) chmod($backup, $conf['fperm']);
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}
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//check if can open for writing, else restore
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return io_saveFile($file,$out);
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}
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return false;
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}
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/**
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* Rebuild the set of local plugins
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*
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* @return array array of plugins to be saved in end($config_cascade['plugins']['local'])
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*/
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protected function rebuildLocal() {
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//assign to local variable to avoid overwriting
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$backup = $this->tmp_plugins;
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//Can't do anything about protected one so rule them out completely
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$local_default = array_diff_key($backup,$this->plugin_cascade['protected']);
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//Diff between local+default and default
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//gives us the ones we need to check and save
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$diffed_ones = array_diff_key($local_default,$this->plugin_cascade['default']);
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//The ones which we are sure of (list of 0s not in default)
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$sure_plugins = array_filter($diffed_ones,array($this,'negate'));
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//the ones in need of diff
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$conflicts = array_diff_key($local_default,$diffed_ones);
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//The final list
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return array_merge($sure_plugins,array_diff_assoc($conflicts,$this->plugin_cascade['default']));
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}
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/**
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* Build the list of plugins and cascade
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*
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*/
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protected function loadConfig() {
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global $config_cascade;
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foreach(array('default','protected') as $type) {
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if(array_key_exists($type,$config_cascade['plugins']))
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$this->plugin_cascade[$type] = $this->checkRequire($config_cascade['plugins'][$type]);
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}
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$local = $config_cascade['plugins']['local'];
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$this->last_local_config_file = array_pop($local);
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$this->plugin_cascade['local'] = $this->checkRequire(array($this->last_local_config_file));
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if(is_array($local)) {
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$this->plugin_cascade['default'] = array_merge($this->plugin_cascade['default'],$this->checkRequire($local));
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}
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$this->tmp_plugins = array_merge($this->plugin_cascade['default'],$this->plugin_cascade['local'],$this->plugin_cascade['protected']);
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}
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/**
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* Returns a list of available plugin components of given type
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*
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* @param string $type plugin_type name; the type of plugin to return,
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* @param bool $enabled true to return enabled plugins,
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* false to return disabled plugins
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* @return array of plugin components of requested type
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*/
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protected function _getListByType($type, $enabled) {
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$master_list = $enabled ? array_keys(array_filter($this->tmp_plugins)) : array_keys(array_filter($this->tmp_plugins,array($this,'negate')));
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$plugins = array();
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foreach ($master_list as $plugin) {
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$basedir = $this->get_directory($plugin);
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if (file_exists(DOKU_PLUGIN."$basedir/$type.php")){
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$plugins[] = $plugin;
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continue;
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}
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$typedir = DOKU_PLUGIN."$basedir/$type/";
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if (is_dir($typedir)) {
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if ($dp = opendir($typedir)) {
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while (false !== ($component = readdir($dp))) {
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if (substr($component,0,1) == '.' || strtolower(substr($component, -4)) != ".php") continue;
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if (is_file($typedir.$component)) {
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$plugins[] = $plugin.'_'.substr($component, 0, -4);
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}
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}
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closedir($dp);
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}
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}
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}//foreach
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return $plugins;
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}
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/**
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* Split name in a plugin name and a component name
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*
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* @param string $name
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* @return array with
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* - plugin name
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* - and component name when available, otherwise empty string
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*/
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protected function _splitName($name) {
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if (array_search($name, array_keys($this->tmp_plugins)) === false) {
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return explode('_',$name,2);
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}
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return array($name,'');
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}
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/**
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* Returns inverse boolean value of the input
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*
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* @param mixed $input
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* @return bool inversed boolean value of input
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*/
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protected function negate($input) {
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return !(bool) $input;
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}
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}
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