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715 lines
26 KiB
PHP
715 lines
26 KiB
PHP
<?php
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/**
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+-----------------------------------------------------------------------+
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| This file is part of the Roundcube Webmail client |
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| Copyright (C) The Roundcube Dev Team |
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| Licensed under the GNU General Public License version 3 or |
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| any later version with exceptions for skins & plugins. |
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| See the README file for a full license statement. |
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| PURPOSE: |
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| Plugins repository |
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+-----------------------------------------------------------------------+
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| Author: Thomas Bruederli <roundcube@gmail.com> |
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+-----------------------------------------------------------------------+
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*/
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// location where plugins are loaded from
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if (!defined('RCUBE_PLUGINS_DIR')) {
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define('RCUBE_PLUGINS_DIR', RCUBE_INSTALL_PATH . 'plugins/');
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}
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/**
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* The plugin loader and global API
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*
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* @package Framework
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* @subpackage PluginAPI
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*/
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class rcube_plugin_api
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{
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static protected $instance;
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public $dir;
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public $url = 'plugins/';
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public $task = '';
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public $initialized = false;
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public $output;
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public $handlers = array();
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public $allowed_prefs = array();
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public $allowed_session_prefs = array();
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public $active_plugins = array();
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protected $plugins = array();
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protected $plugins_initialized = array();
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protected $tasks = array();
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protected $actions = array();
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protected $actionmap = array();
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protected $objectsmap = array();
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protected $template_contents = array();
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protected $exec_stack = array();
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protected $deprecated_hooks = array();
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/**
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* This implements the 'singleton' design pattern
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*
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* @return rcube_plugin_api The one and only instance if this class
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*/
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static function get_instance()
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{
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if (!self::$instance) {
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self::$instance = new rcube_plugin_api();
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}
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return self::$instance;
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}
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/**
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* Private constructor
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*/
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protected function __construct()
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{
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$this->dir = slashify(RCUBE_PLUGINS_DIR);
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}
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/**
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* Initialize plugin engine
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*
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* This has to be done after rcmail::load_gui() or rcmail::json_init()
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* was called because plugins need to have access to rcmail->output
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*
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* @param object rcube Instance of the rcube base class
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* @param string Current application task (used for conditional plugin loading)
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*/
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public function init($app, $task = '')
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{
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$this->task = $task;
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$this->output = $app->output;
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// register an internal hook
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$this->register_hook('template_container', array($this, 'template_container_hook'));
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// maybe also register a shudown function which triggers
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// shutdown functions of all plugin objects
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foreach ($this->plugins as $plugin) {
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// ... task, request type and framed mode
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if (!$this->plugins_initialized[$plugin->ID] && !$this->filter($plugin)) {
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$plugin->init();
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$this->plugins_initialized[$plugin->ID] = $plugin;
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}
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}
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// we have finished initializing all plugins
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$this->initialized = true;
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}
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/**
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* Load and init all enabled plugins
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*
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* This has to be done after rcmail::load_gui() or rcmail::json_init()
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* was called because plugins need to have access to rcmail->output
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*
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* @param array List of configured plugins to load
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* @param array List of plugins required by the application
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*/
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public function load_plugins($plugins_enabled, $required_plugins = array())
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{
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foreach ($plugins_enabled as $plugin_name) {
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$this->load_plugin($plugin_name);
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}
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// check existance of all required core plugins
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foreach ($required_plugins as $plugin_name) {
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$loaded = false;
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foreach ($this->plugins as $plugin) {
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if ($plugin instanceof $plugin_name) {
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$loaded = true;
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break;
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}
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}
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// load required core plugin if no derivate was found
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if (!$loaded) {
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$loaded = $this->load_plugin($plugin_name);
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}
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// trigger fatal error if still not loaded
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if (!$loaded) {
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rcube::raise_error(array(
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'code' => 520, 'type' => 'php',
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'file' => __FILE__, 'line' => __LINE__,
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'message' => "Requried plugin $plugin_name was not loaded"), true, true);
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}
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}
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}
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/**
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* Load the specified plugin
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*
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* @param string Plugin name
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* @param boolean Force loading of the plugin even if it doesn't match the filter
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* @param boolean Require loading of the plugin, error if it doesn't exist
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*
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* @return boolean True on success, false if not loaded or failure
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*/
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public function load_plugin($plugin_name, $force = false, $require = true)
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{
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static $plugins_dir;
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if (!$plugins_dir) {
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$dir = dir($this->dir);
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$plugins_dir = unslashify($dir->path);
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}
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// Validate the plugin name to prevent from path traversal
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if (preg_match('/[^a-zA-Z0-9_-]/', $plugin_name)) {
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rcube::raise_error(array('code' => 520,
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'file' => __FILE__, 'line' => __LINE__,
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'message' => "Invalid plugin name: $plugin_name"), true, false);
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return false;
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}
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// plugin already loaded?
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if (!$this->plugins[$plugin_name]) {
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$fn = "$plugins_dir/$plugin_name/$plugin_name.php";
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if (!is_readable($fn)) {
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if ($require) {
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rcube::raise_error(array('code' => 520, 'type' => 'php',
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'file' => __FILE__, 'line' => __LINE__,
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'message' => "Failed to load plugin file $fn"), true, false);
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}
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return false;
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}
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if (!class_exists($plugin_name, false)) {
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include $fn;
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}
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// instantiate class if exists
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if (!class_exists($plugin_name, false)) {
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rcube::raise_error(array('code' => 520, 'type' => 'php',
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'file' => __FILE__, 'line' => __LINE__,
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'message' => "No plugin class $plugin_name found in $fn"),
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true, false);
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return false;
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}
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$plugin = new $plugin_name($this);
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$this->active_plugins[] = $plugin_name;
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// check inheritance...
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if (is_subclass_of($plugin, 'rcube_plugin')) {
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// call onload method on plugin if it exists.
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// this is useful if you want to be called early in the boot process
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if (method_exists($plugin, 'onload')) {
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$plugin->onload();
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}
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if (!empty($plugin->allowed_prefs)) {
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$this->allowed_prefs = array_merge($this->allowed_prefs, $plugin->allowed_prefs);
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}
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$this->plugins[$plugin_name] = $plugin;
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}
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}
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if ($plugin = $this->plugins[$plugin_name]) {
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// init a plugin only if $force is set or if we're called after initialization
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if (($force || $this->initialized) && !$this->plugins_initialized[$plugin_name] && ($force || !$this->filter($plugin))) {
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$plugin->init();
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$this->plugins_initialized[$plugin_name] = $plugin;
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}
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}
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return true;
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}
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/**
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* check if we should prevent this plugin from initialising
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*
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* @param $plugin
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* @return bool
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*/
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private function filter($plugin)
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{
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return ($plugin->noajax && !(is_object($this->output) && $this->output->type == 'html'))
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|| ($plugin->task && !preg_match('/^('.$plugin->task.')$/i', $this->task))
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|| ($plugin->noframe && !empty($_REQUEST['_framed']));
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}
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/**
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* Get information about a specific plugin.
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* This is either provided my a plugin's info() method or extracted from a package.xml or a composer.json file
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*
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* @param string Plugin name
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* @return array Meta information about a plugin or False if plugin was not found
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*/
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public function get_info($plugin_name)
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{
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static $composer_lock, $license_uris = array(
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'Apache' => 'http://www.apache.org/licenses/LICENSE-2.0.html',
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'Apache-2' => 'http://www.apache.org/licenses/LICENSE-2.0.html',
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'Apache-1' => 'http://www.apache.org/licenses/LICENSE-1.0',
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'Apache-1.1' => 'http://www.apache.org/licenses/LICENSE-1.1',
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'GPL' => 'http://www.gnu.org/licenses/gpl.html',
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'GPLv2' => 'http://www.gnu.org/licenses/gpl-2.0.html',
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'GPL-2.0' => 'http://www.gnu.org/licenses/gpl-2.0.html',
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'GPLv3' => 'http://www.gnu.org/licenses/gpl-3.0.html',
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'GPLv3+' => 'http://www.gnu.org/licenses/gpl-3.0.html',
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'GPL-3.0' => 'http://www.gnu.org/licenses/gpl-3.0.html',
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'GPL-3.0+' => 'http://www.gnu.org/licenses/gpl.html',
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'GPL-2.0+' => 'http://www.gnu.org/licenses/gpl.html',
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'AGPLv3' => 'http://www.gnu.org/licenses/agpl.html',
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'AGPLv3+' => 'http://www.gnu.org/licenses/agpl.html',
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'AGPL-3.0' => 'http://www.gnu.org/licenses/agpl.html',
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'LGPL' => 'http://www.gnu.org/licenses/lgpl.html',
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'LGPLv2' => 'http://www.gnu.org/licenses/lgpl-2.0.html',
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'LGPLv2.1' => 'http://www.gnu.org/licenses/lgpl-2.1.html',
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'LGPLv3' => 'http://www.gnu.org/licenses/lgpl.html',
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'LGPL-2.0' => 'http://www.gnu.org/licenses/lgpl-2.0.html',
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'LGPL-2.1' => 'http://www.gnu.org/licenses/lgpl-2.1.html',
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'LGPL-3.0' => 'http://www.gnu.org/licenses/lgpl.html',
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'LGPL-3.0+' => 'http://www.gnu.org/licenses/lgpl.html',
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'BSD' => 'http://opensource.org/licenses/bsd-license.html',
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'BSD-2-Clause' => 'http://opensource.org/licenses/BSD-2-Clause',
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'BSD-3-Clause' => 'http://opensource.org/licenses/BSD-3-Clause',
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'FreeBSD' => 'http://opensource.org/licenses/BSD-2-Clause',
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'MIT' => 'http://www.opensource.org/licenses/mit-license.php',
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'PHP' => 'http://opensource.org/licenses/PHP-3.0',
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'PHP-3' => 'http://www.php.net/license/3_01.txt',
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'PHP-3.0' => 'http://www.php.net/license/3_0.txt',
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'PHP-3.01' => 'http://www.php.net/license/3_01.txt',
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);
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$dir = dir($this->dir);
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$fn = unslashify($dir->path) . "/$plugin_name/$plugin_name.php";
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$info = false;
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// Validate the plugin name to prevent from path traversal
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if (preg_match('/[^a-zA-Z0-9_-]/', $plugin_name)) {
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rcube::raise_error(array('code' => 520,
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'file' => __FILE__, 'line' => __LINE__,
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'message' => "Invalid plugin name: $plugin_name"), true, false);
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return false;
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}
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if (!class_exists($plugin_name, false)) {
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if (is_readable($fn)) {
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include($fn);
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}
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else {
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return false;
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}
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}
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if (class_exists($plugin_name)) {
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$info = $plugin_name::info();
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}
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// fall back to composer.json file
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if (!$info) {
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$composer = INSTALL_PATH . "/plugins/$plugin_name/composer.json";
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if (is_readable($composer) && ($json = @json_decode(file_get_contents($composer), true))) {
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list($info['vendor'], $info['name']) = explode('/', $json['name']);
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$info['version'] = $json['version'];
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$info['license'] = $json['license'];
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$info['uri'] = $json['homepage'];
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$info['require'] = array_filter(array_keys((array)$json['require']), function($pname) {
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if (strpos($pname, '/') == false) {
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return false;
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}
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list($vendor, $name) = explode('/', $pname);
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return !($name == 'plugin-installer' || $vendor == 'pear-pear');
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});
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}
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// read local composer.lock file (once)
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if (!isset($composer_lock)) {
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$composer_lock = @json_decode(@file_get_contents(INSTALL_PATH . "/composer.lock"), true);
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if ($composer_lock['packages']) {
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foreach ($composer_lock['packages'] as $i => $package) {
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$composer_lock['installed'][$package['name']] = $package;
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}
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}
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}
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// load additional information from local composer.lock file
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if ($lock = $composer_lock['installed'][$json['name']]) {
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$info['version'] = $lock['version'];
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$info['uri'] = $lock['homepage'] ?: $lock['source']['uri'];
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$info['src_uri'] = $lock['dist']['uri'] ?: $lock['source']['uri'];
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}
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}
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// fall back to package.xml file
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if (!$info) {
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$package = INSTALL_PATH . "/plugins/$plugin_name/package.xml";
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if (is_readable($package) && ($file = file_get_contents($package))) {
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$doc = new DOMDocument();
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$doc->loadXML($file);
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$xpath = new DOMXPath($doc);
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$xpath->registerNamespace('rc', "http://pear.php.net/dtd/package-2.0");
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// XPaths of plugin metadata elements
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$metadata = array(
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'name' => 'string(//rc:package/rc:name)',
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'version' => 'string(//rc:package/rc:version/rc:release)',
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'license' => 'string(//rc:package/rc:license)',
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'license_uri' => 'string(//rc:package/rc:license/@uri)',
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'src_uri' => 'string(//rc:package/rc:srcuri)',
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'uri' => 'string(//rc:package/rc:uri)',
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);
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foreach ($metadata as $key => $path) {
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$info[$key] = $xpath->evaluate($path);
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}
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// dependent required plugins (can be used, but not included in config)
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$deps = $xpath->evaluate('//rc:package/rc:dependencies/rc:required/rc:package/rc:name');
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for ($i = 0; $i < $deps->length; $i++) {
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$dn = $deps->item($i)->nodeValue;
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$info['require'][] = $dn;
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}
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}
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}
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// At least provide the name
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if (!$info && class_exists($plugin_name)) {
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$info = array('name' => $plugin_name, 'version' => '--');
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}
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else if ($info['license'] && empty($info['license_uri']) && ($license_uri = $license_uris[$info['license']])) {
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$info['license_uri'] = $license_uri;
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}
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return $info;
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}
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/**
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* Allows a plugin object to register a callback for a certain hook
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*
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* @param string $hook Hook name
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* @param mixed $callback String with global function name or array($obj, 'methodname')
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*/
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public function register_hook($hook, $callback)
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{
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if (is_callable($callback)) {
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if (isset($this->deprecated_hooks[$hook])) {
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rcube::raise_error(array('code' => 522, 'type' => 'php',
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'file' => __FILE__, 'line' => __LINE__,
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'message' => "Deprecated hook name. "
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. $hook . ' -> ' . $this->deprecated_hooks[$hook]), true, false);
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$hook = $this->deprecated_hooks[$hook];
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}
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$this->handlers[$hook][] = $callback;
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}
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else {
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rcube::raise_error(array('code' => 521, 'type' => 'php',
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'file' => __FILE__, 'line' => __LINE__,
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'message' => "Invalid callback function for $hook"), true, false);
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}
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}
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/**
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* Allow a plugin object to unregister a callback.
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*
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* @param string $hook Hook name
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* @param mixed $callback String with global function name or array($obj, 'methodname')
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*/
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public function unregister_hook($hook, $callback)
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{
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$callback_id = array_search($callback, (array) $this->handlers[$hook]);
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if ($callback_id !== false) {
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// array_splice() removes the element and re-indexes keys
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// that is required by the 'for' loop in exec_hook() below
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array_splice($this->handlers[$hook], $callback_id, 1);
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}
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}
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/**
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* Triggers a plugin hook.
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* This is called from the application and executes all registered handlers
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*
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* @param string $hook Hook name
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* @param array $args Named arguments (key->value pairs)
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*
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* @return array The (probably) altered hook arguments
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*/
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public function exec_hook($hook, $args = array())
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{
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if (!is_array($args)) {
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$args = array('arg' => $args);
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}
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// TODO: avoid recursion by checking in_array($hook, $this->exec_stack) ?
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$args += array('abort' => false);
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array_push($this->exec_stack, $hook);
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// Use for loop here, so handlers added in the hook will be executed too
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if (!empty($this->handlers[$hook])) {
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for ($i = 0; $i < count($this->handlers[$hook]); $i++) {
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$ret = call_user_func($this->handlers[$hook][$i], $args);
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if ($ret && is_array($ret)) {
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$args = $ret + $args;
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}
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if ($args['break']) {
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break;
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}
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}
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}
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array_pop($this->exec_stack);
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return $args;
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}
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/**
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* Let a plugin register a handler for a specific request
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*
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* @param string $action Action name (_task=mail&_action=plugin.foo)
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* @param string $owner Plugin name that registers this action
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* @param mixed $callback Callback: string with global function name or array($obj, 'methodname')
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* @param string $task Task name registered by this plugin
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*/
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public function register_action($action, $owner, $callback, $task = null)
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{
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// check action name
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if ($task)
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$action = $task.'.'.$action;
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else if (strpos($action, 'plugin.') !== 0)
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$action = 'plugin.'.$action;
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|
|
// can register action only if it's not taken or registered by myself
|
|
if (!isset($this->actionmap[$action]) || $this->actionmap[$action] == $owner) {
|
|
$this->actions[$action] = $callback;
|
|
$this->actionmap[$action] = $owner;
|
|
}
|
|
else {
|
|
rcube::raise_error(array('code' => 523, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Cannot register action $action;"
|
|
." already taken by another plugin"), true, false);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This method handles requests like _task=mail&_action=plugin.foo
|
|
* It executes the callback function that was registered with the given action.
|
|
*
|
|
* @param string $action Action name
|
|
*/
|
|
public function exec_action($action)
|
|
{
|
|
if (isset($this->actions[$action])) {
|
|
call_user_func($this->actions[$action]);
|
|
}
|
|
else if (rcube::get_instance()->action != 'refresh') {
|
|
rcube::raise_error(array('code' => 524, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "No handler found for action $action"), true, true);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Register a handler function for template objects
|
|
*
|
|
* @param string $name Object name
|
|
* @param string $owner Plugin name that registers this action
|
|
* @param mixed $callback Callback: string with global function name or array($obj, 'methodname')
|
|
*/
|
|
public function register_handler($name, $owner, $callback)
|
|
{
|
|
// check name
|
|
if (strpos($name, 'plugin.') !== 0) {
|
|
$name = 'plugin.' . $name;
|
|
}
|
|
|
|
// can register handler only if it's not taken or registered by myself
|
|
if (is_object($this->output)
|
|
&& (!isset($this->objectsmap[$name]) || $this->objectsmap[$name] == $owner)
|
|
) {
|
|
$this->output->add_handler($name, $callback);
|
|
$this->objectsmap[$name] = $owner;
|
|
}
|
|
else {
|
|
rcube::raise_error(array('code' => 525, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Cannot register template handler $name;"
|
|
." already taken by another plugin or no output object available"), true, false);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Register this plugin to be responsible for a specific task
|
|
*
|
|
* @param string $task Task name (only characters [a-z0-9_-] are allowed)
|
|
* @param string $owner Plugin name that registers this action
|
|
*/
|
|
public function register_task($task, $owner)
|
|
{
|
|
// tasks are irrelevant in framework mode
|
|
if (!class_exists('rcmail', false)) {
|
|
return true;
|
|
}
|
|
|
|
if ($task != asciiwords($task, true)) {
|
|
rcube::raise_error(array('code' => 526, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Invalid task name: $task."
|
|
." Only characters [a-z0-9_.-] are allowed"), true, false);
|
|
}
|
|
else if (in_array($task, rcmail::$main_tasks)) {
|
|
rcube::raise_error(array('code' => 526, 'type' => 'php',
|
|
'file' => __FILE__, 'line' => __LINE__,
|
|
'message' => "Cannot register taks $task;"
|
|
." already taken by another plugin or the application itself"), true, false);
|
|
}
|
|
else {
|
|
$this->tasks[$task] = $owner;
|
|
rcmail::$main_tasks[] = $task;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Checks whether the given task is registered by a plugin
|
|
*
|
|
* @param string $task Task name
|
|
*
|
|
* @return boolean True if registered, otherwise false
|
|
*/
|
|
public function is_plugin_task($task)
|
|
{
|
|
return $this->tasks[$task] ? true : false;
|
|
}
|
|
|
|
/**
|
|
* Check if a plugin hook is currently processing.
|
|
* Mainly used to prevent loops and recursion.
|
|
*
|
|
* @param string $hook Hook to check (optional)
|
|
*
|
|
* @return boolean True if any/the given hook is currently processed, otherwise false
|
|
*/
|
|
public function is_processing($hook = null)
|
|
{
|
|
return count($this->exec_stack) > 0 && (!$hook || in_array($hook, $this->exec_stack));
|
|
}
|
|
|
|
/**
|
|
* Include a plugin script file in the current HTML page
|
|
*
|
|
* @param string $fn Path to script
|
|
*/
|
|
public function include_script($fn)
|
|
{
|
|
if (is_object($this->output) && $this->output->type == 'html') {
|
|
$src = $this->resource_url($fn);
|
|
$this->output->include_script($src, 'head_bottom', false);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Include a plugin stylesheet in the current HTML page
|
|
*
|
|
* @param string $fn Path to stylesheet
|
|
*/
|
|
public function include_stylesheet($fn)
|
|
{
|
|
if (is_object($this->output) && $this->output->type == 'html') {
|
|
if ($fn[0] != '/' && !preg_match('|^https?://|i', $fn)) {
|
|
$rcube = rcube::get_instance();
|
|
$devel_mode = $rcube->config->get('devel_mode');
|
|
$assets_dir = $rcube->config->get('assets_dir');
|
|
$path = unslashify($assets_dir ?: RCUBE_INSTALL_PATH);
|
|
|
|
// Prefer .less files in devel_mode (assume less.js is loaded)
|
|
if ($devel_mode) {
|
|
$less = preg_replace('/\.css$/i', '.less', $fn);
|
|
if ($less != $fn && is_file("$path/plugins/$less")) {
|
|
$fn = $less;
|
|
}
|
|
}
|
|
else if (!preg_match('/\.min\.css$/', $fn)) {
|
|
$min = preg_replace('/\.css$/i', '.min.css', $fn);
|
|
if (is_file("$path/plugins/$min")) {
|
|
$fn = $min;
|
|
}
|
|
}
|
|
|
|
if (!is_file("$path/plugins/$fn")) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
$src = $this->resource_url($fn);
|
|
$this->output->include_css($src);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Save the given HTML content to be added to a template container
|
|
*
|
|
* @param string $html HTML content
|
|
* @param string $container Template container identifier
|
|
*/
|
|
public function add_content($html, $container)
|
|
{
|
|
$this->template_contents[$container] .= $html . "\n";
|
|
}
|
|
|
|
/**
|
|
* Returns list of loaded plugins names
|
|
*
|
|
* @return array List of plugin names
|
|
*/
|
|
public function loaded_plugins()
|
|
{
|
|
return array_keys($this->plugins);
|
|
}
|
|
|
|
/**
|
|
* Returns loaded plugin
|
|
*
|
|
* @return rcube_plugin Plugin instance
|
|
*/
|
|
public function get_plugin($name)
|
|
{
|
|
return $this->plugins[$name];
|
|
}
|
|
|
|
/**
|
|
* Callback for template_container hooks
|
|
*
|
|
* @param array $attrib
|
|
* @return array
|
|
*/
|
|
protected function template_container_hook($attrib)
|
|
{
|
|
$container = $attrib['name'];
|
|
return array('content' => $attrib['content'] . $this->template_contents[$container]);
|
|
}
|
|
|
|
/**
|
|
* Make the given file name link into the plugins directory
|
|
*
|
|
* @param string $fn Filename
|
|
* @return string
|
|
*/
|
|
protected function resource_url($fn)
|
|
{
|
|
if ($fn[0] != '/' && !preg_match('|^https?://|i', $fn))
|
|
return $this->url . $fn;
|
|
else
|
|
return $fn;
|
|
}
|
|
}
|