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diff --git a/program/lib/Roundcube/rcube_plugin_api.php b/program/lib/Roundcube/rcube_plugin_api.php
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+<?php
+
+/*
+ +-----------------------------------------------------------------------+
+ | program/include/rcube_plugin_api.php |
+ | |
+ | This file is part of the Roundcube Webmail client |
+ | Copyright (C) 2008-2011, The Roundcube Dev Team |
+ | |
+ | Licensed under the GNU General Public License version 3 or |
+ | any later version with exceptions for skins & plugins. |
+ | See the README file for a full license statement. |
+ | |
+ | PURPOSE: |
+ | Plugins repository |
+ | |
+ +-----------------------------------------------------------------------+
+ | Author: Thomas Bruederli <roundcube@gmail.com> |
+ +-----------------------------------------------------------------------+
+*/
+
+// location where plugins are loade from
+if (!defined('RCMAIL_PLUGINS_DIR'))
+ define('RCMAIL_PLUGINS_DIR', INSTALL_PATH . 'plugins/');
+
+
+/**
+ * The plugin loader and global API
+ *
+ * @package Framework
+ * @subpackage PluginAPI
+ */
+class rcube_plugin_api
+{
+ static protected $instance;
+
+ public $dir;
+ public $url = 'plugins/';
+ public $task = '';
+ public $output;
+
+ public $handlers = array();
+ protected $plugins = array();
+ protected $tasks = array();
+ protected $actions = array();
+ protected $actionmap = array();
+ protected $objectsmap = array();
+ protected $template_contents = array();
+ protected $active_hook = false;
+
+ // Deprecated names of hooks, will be removed after 0.5-stable release
+ protected $deprecated_hooks = array(
+ 'create_user' => 'user_create',
+ 'kill_session' => 'session_destroy',
+ 'upload_attachment' => 'attachment_upload',
+ 'save_attachment' => 'attachment_save',
+ 'get_attachment' => 'attachment_get',
+ 'cleanup_attachments' => 'attachments_cleanup',
+ 'display_attachment' => 'attachment_display',
+ 'remove_attachment' => 'attachment_delete',
+ 'outgoing_message_headers' => 'message_outgoing_headers',
+ 'outgoing_message_body' => 'message_outgoing_body',
+ 'address_sources' => 'addressbooks_list',
+ 'get_address_book' => 'addressbook_get',
+ 'create_contact' => 'contact_create',
+ 'save_contact' => 'contact_update',
+ 'contact_save' => 'contact_update',
+ 'delete_contact' => 'contact_delete',
+ 'manage_folders' => 'folders_list',
+ 'list_mailboxes' => 'mailboxes_list',
+ 'save_preferences' => 'preferences_save',
+ 'user_preferences' => 'preferences_list',
+ 'list_prefs_sections' => 'preferences_sections_list',
+ 'list_identities' => 'identities_list',
+ 'create_identity' => 'identity_create',
+ 'delete_identity' => 'identity_delete',
+ 'save_identity' => 'identity_update',
+ 'identity_save' => 'identity_update',
+ // to be removed after 0.8
+ 'imap_init' => 'storage_init',
+ 'mailboxes_list' => 'storage_folders',
+ );
+
+ /**
+ * This implements the 'singleton' design pattern
+ *
+ * @return rcube_plugin_api The one and only instance if this class
+ */
+ static function get_instance()
+ {
+ if (!self::$instance) {
+ self::$instance = new rcube_plugin_api();
+ }
+
+ return self::$instance;
+ }
+
+
+ /**
+ * Private constructor
+ */
+ protected function __construct()
+ {
+ $this->dir = slashify(RCMAIL_PLUGINS_DIR);
+ }
+
+
+ /**
+ * Initialize plugin engine
+ *
+ * This has to be done after rcmail::load_gui() or rcmail::json_init()
+ * was called because plugins need to have access to rcmail->output
+ *
+ * @param object rcube Instance of the rcube base class
+ * @param string Current application task (used for conditional plugin loading)
+ */
+ public function init($app, $task = '')
+ {
+ $this->task = $task;
+ $this->output = $app->output;
+
+ // register an internal hook
+ $this->register_hook('template_container', array($this, 'template_container_hook'));
+
+ // maybe also register a shudown function which triggers shutdown functions of all plugin objects
+ }
+
+
+ /**
+ * Load and init all enabled plugins
+ *
+ * This has to be done after rcmail::load_gui() or rcmail::json_init()
+ * was called because plugins need to have access to rcmail->output
+ *
+ * @param array List of configured plugins to load
+ * @param array List of plugins required by the application
+ */
+ public function load_plugins($plugins_enabled, $required_plugins = array())
+ {
+ foreach ($plugins_enabled as $plugin_name) {
+ $this->load_plugin($plugin_name);
+ }
+
+ // check existance of all required core plugins
+ foreach ($required_plugins as $plugin_name) {
+ $loaded = false;
+ foreach ($this->plugins as $plugin) {
+ if ($plugin instanceof $plugin_name) {
+ $loaded = true;
+ break;
+ }
+ }
+
+ // load required core plugin if no derivate was found
+ if (!$loaded)
+ $loaded = $this->load_plugin($plugin_name);
+
+ // trigger fatal error if still not loaded
+ if (!$loaded) {
+ rcube::raise_error(array('code' => 520, 'type' => 'php',
+ 'file' => __FILE__, 'line' => __LINE__,
+ 'message' => "Requried plugin $plugin_name was not loaded"), true, true);
+ }
+ }
+ }
+
+ /**
+ * Load the specified plugin
+ *
+ * @param string Plugin name
+ * @return boolean True on success, false if not loaded or failure
+ */
+ public function load_plugin($plugin_name)
+ {
+ static $plugins_dir;
+
+ if (!$plugins_dir) {
+ $dir = dir($this->dir);
+ $plugins_dir = unslashify($dir->path);
+ }
+
+ // plugin already loaded
+ if ($this->plugins[$plugin_name] || class_exists($plugin_name, false))
+ return true;
+
+ $fn = $plugins_dir . DIRECTORY_SEPARATOR . $plugin_name . DIRECTORY_SEPARATOR . $plugin_name . '.php';
+
+ if (file_exists($fn)) {
+ include($fn);
+
+ // instantiate class if exists
+ if (class_exists($plugin_name, false)) {
+ $plugin = new $plugin_name($this);
+ // check inheritance...
+ if (is_subclass_of($plugin, 'rcube_plugin')) {
+ // ... task, request type and framed mode
+ if ((!$plugin->task || preg_match('/^('.$plugin->task.')$/i', $this->task))
+ && (!$plugin->noajax || (is_object($this->output) && $this->output->type == 'html'))
+ && (!$plugin->noframe || empty($_REQUEST['_framed']))
+ ) {
+ $plugin->init();
+ $this->plugins[$plugin_name] = $plugin;
+ }
+ return true;
+ }
+ }
+ else {
+ rcube::raise_error(array('code' => 520, 'type' => 'php',
+ 'file' => __FILE__, 'line' => __LINE__,
+ 'message' => "No plugin class $plugin_name found in $fn"), true, false);
+ }
+ }
+ else {
+ rcube::raise_error(array('code' => 520, 'type' => 'php',
+ 'file' => __FILE__, 'line' => __LINE__,
+ 'message' => "Failed to load plugin file $fn"), true, false);
+ }
+
+ return false;
+ }
+
+
+ /**
+ * Allows a plugin object to register a callback for a certain hook
+ *
+ * @param string $hook Hook name
+ * @param mixed $callback String with global function name or array($obj, 'methodname')
+ */
+ public function register_hook($hook, $callback)
+ {
+ if (is_callable($callback)) {
+ if (isset($this->deprecated_hooks[$hook])) {
+ rcube::raise_error(array('code' => 522, 'type' => 'php',
+ 'file' => __FILE__, 'line' => __LINE__,
+ 'message' => "Deprecated hook name. ".$hook.' -> '.$this->deprecated_hooks[$hook]), true, false);
+ $hook = $this->deprecated_hooks[$hook];
+ }
+ $this->handlers[$hook][] = $callback;
+ }
+ else
+ rcube::raise_error(array('code' => 521, 'type' => 'php',
+ 'file' => __FILE__, 'line' => __LINE__,
+ 'message' => "Invalid callback function for $hook"), true, false);
+ }
+
+ /**
+ * Allow a plugin object to unregister a callback.
+ *
+ * @param string $hook Hook name
+ * @param mixed $callback String with global function name or array($obj, 'methodname')
+ */
+ public function unregister_hook($hook, $callback)
+ {
+ $callback_id = array_search($callback, $this->handlers[$hook]);
+ if ($callback_id !== false) {
+ unset($this->handlers[$hook][$callback_id]);
+ }
+ }
+
+
+ /**
+ * Triggers a plugin hook.
+ * This is called from the application and executes all registered handlers
+ *
+ * @param string $hook Hook name
+ * @param array $args Named arguments (key->value pairs)
+ * @return array The (probably) altered hook arguments
+ */
+ public function exec_hook($hook, $args = array())
+ {
+ if (!is_array($args))
+ $args = array('arg' => $args);
+
+ $args += array('abort' => false);
+ $this->active_hook = $hook;
+
+ foreach ((array)$this->handlers[$hook] as $callback) {
+ $ret = call_user_func($callback, $args);
+ if ($ret && is_array($ret))
+ $args = $ret + $args;
+
+ if ($args['abort'])
+ break;
+ }
+
+ $this->active_hook = false;
+ return $args;
+ }
+
+
+ /**
+ * Let a plugin register a handler for a specific request
+ *
+ * @param string $action Action name (_task=mail&_action=plugin.foo)
+ * @param string $owner Plugin name that registers this action
+ * @param mixed $callback Callback: string with global function name or array($obj, 'methodname')
+ * @param string $task Task name registered by this plugin
+ */
+ public function register_action($action, $owner, $callback, $task = null)
+ {
+ // check action name
+ if ($task)
+ $action = $task.'.'.$action;
+ else if (strpos($action, 'plugin.') !== 0)
+ $action = 'plugin.'.$action;
+
+ // 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, $owner)
+ {
+ if ($task != asciiwords($task)) {
+ 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 $this->active_hook && (!$hook || $this->active_hook == $hook);
+ }
+
+ /**
+ * 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->add_header(html::tag('script', array('type' => "text/javascript", 'src' => $src)));
+ }
+ }
+
+
+ /**
+ * 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') {
+ $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);
+ }
+
+
+ /**
+ * 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;
+ }
+
+}