commit | author | age
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<?php |
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/* |
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+-----------------------------------------------------------------------+ |
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| program/include/rcube_plugin_api.php | |
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| | |
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| This file is part of the Roundcube Webmail client | |
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| Copyright (C) 2008-2009, The Roundcube Dev Team | |
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| Licensed under the GNU GPL | |
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| | |
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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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$Id$ |
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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 PluginAPI |
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*/ |
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class rcube_plugin_api |
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{ |
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static private $instance; |
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public $dir; |
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public $url = 'plugins/'; |
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public $output; |
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public $config; |
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public $allowed_prefs = array(); |
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public $allowed_session_prefs = array(); |
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public $handlers = array(); |
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private $plugins = array(); |
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private $tasks = array(); |
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private $actions = array(); |
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private $actionmap = array(); |
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private $objectsmap = array(); |
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private $template_contents = array(); |
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private $required_plugins = array('filesystem_attachments'); |
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private $active_hook = false; |
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// Deprecated names of hooks, will be removed after 0.5-stable release |
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private $deprecated_hooks = array( |
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'create_user' => 'user_create', |
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'kill_session' => 'session_destroy', |
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'upload_attachment' => 'attachment_upload', |
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'save_attachment' => 'attachment_save', |
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'get_attachment' => 'attachment_get', |
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'cleanup_attachments' => 'attachments_cleanup', |
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'display_attachment' => 'attachment_display', |
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'remove_attachment' => 'attachment_delete', |
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'outgoing_message_headers' => 'message_outgoing_headers', |
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'outgoing_message_body' => 'message_outgoing_body', |
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'address_sources' => 'addressbooks_list', |
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'get_address_book' => 'addressbook_get', |
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'create_contact' => 'contact_create', |
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'save_contact' => 'contact_update', |
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'contact_save' => 'contact_update', |
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'delete_contact' => 'contact_delete', |
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'manage_folders' => 'folders_list', |
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'list_mailboxes' => 'mailboxes_list', |
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'save_preferences' => 'preferences_save', |
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'user_preferences' => 'preferences_list', |
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'list_prefs_sections' => 'preferences_sections_list', |
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'list_identities' => 'identities_list', |
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'create_identity' => 'identity_create', |
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'delete_identity' => 'identity_delete', |
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'save_identity' => 'identity_update', |
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'identity_save' => 'identity_update', |
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); |
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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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private function __construct() |
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{ |
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$this->dir = INSTALL_PATH . $this->url; |
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} |
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/** |
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* Load and init all enabled plugins |
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* |
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* This has to be done after rcmail::load_gui() or rcmail::json_init() |
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* was called because plugins need to have access to rcmail->output |
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*/ |
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public function init() |
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{ |
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$rcmail = rcmail::get_instance(); |
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$this->output = $rcmail->output; |
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$this->config = $rcmail->config; |
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$plugins_enabled = (array)$rcmail->config->get('plugins', array()); |
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foreach ($plugins_enabled as $plugin_name) { |
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$this->load_plugin($plugin_name); |
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} |
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// check existance of all required core plugins |
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foreach ($this->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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// trigger fatal error if still not loaded |
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if (!$loaded) { |
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raise_error(array('code' => 520, 'type' => 'php', |
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'file' => __FILE__, 'line' => __LINE__, |
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'message' => "Requried plugin $plugin_name was not loaded"), true, true); |
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} |
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} |
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// register an internal hook |
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$this->register_hook('template_container', array($this, 'template_container_hook')); |
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// maybe also register a shudown function which triggers shutdown functions of all plugin objects |
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} |
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/** |
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* Load the specified plugin |
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* |
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* @param string Plugin name |
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* @return boolean True on success, false if not loaded or failure |
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*/ |
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public function load_plugin($plugin_name) |
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{ |
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static $plugins_dir; |
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$rcmail = rcmail::get_instance(); |
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if (!$plugins_dir) { |
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$dir = dir($this->dir); |
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$plugins_dir = unslashify($dir->path); |
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} |
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// plugin already loaded |
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if ($this->plugins[$plugin_name] || class_exists($plugin_name, false)) |
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return true; |
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$fn = $plugins_dir . DIRECTORY_SEPARATOR . $plugin_name . DIRECTORY_SEPARATOR . $plugin_name . '.php'; |
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if (file_exists($fn)) { |
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include($fn); |
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// instantiate class if exists |
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if (class_exists($plugin_name, false)) { |
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$plugin = new $plugin_name($this); |
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// check inheritance... |
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if (is_subclass_of($plugin, 'rcube_plugin')) { |
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// ... task, request type and framed mode |
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if ((!$plugin->task || preg_match('/^('.$plugin->task.')$/i', $rcmail->task)) |
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&& (!$plugin->noajax || (is_object($rcmail->output) && is_a($rcmail->output, 'rcube_template'))) |
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&& (!$plugin->noframe || empty($_REQUEST['_framed'])) |
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) { |
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$plugin->init(); |
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$this->plugins[$plugin_name] = $plugin; |
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} |
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if (!empty($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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return true; |
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} |
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} |
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else { |
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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"), true, false); |
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} |
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} |
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else { |
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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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/** |
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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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raise_error(array('code' => 522, 'type' => 'php', |
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'file' => __FILE__, 'line' => __LINE__, |
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'message' => "Deprecated hook name. ".$hook.' -> '.$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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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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* 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 $args Named arguments (key->value pairs) |
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* @return array The (probably) altered hook arguments |
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*/ |
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public function exec_hook($hook, $args = array()) |
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{ |
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if (!is_array($args)) |
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$args = array('arg' => $args); |
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$args += array('abort' => false); |
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$this->active_hook = $hook; |
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foreach ((array)$this->handlers[$hook] as $callback) { |
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$ret = call_user_func($callback, $args); |
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if ($ret && is_array($ret)) |
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$args = $ret + $args; |
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if ($args['abort']) |
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break; |
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} |
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$this->active_hook = false; |
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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.'.$action; |
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// can register action only if it's not taken or registered by myself |
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if (!isset($this->actionmap[$action]) || $this->actionmap[$action] == $owner) { |
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$this->actions[$action] = $callback; |
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$this->actionmap[$action] = $owner; |
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} |
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else { |
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raise_error(array('code' => 523, 'type' => 'php', |
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'file' => __FILE__, 'line' => __LINE__, |
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'message' => "Cannot register action $action; already taken by another plugin"), true, false); |
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} |
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} |
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/** |
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* This method handles requests like _task=mail&_action=plugin.foo |
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* It executes the callback function that was registered with the given action. |
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* |
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* @param string $action Action name |
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*/ |
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public function exec_action($action) |
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{ |
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if (isset($this->actions[$action])) { |
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call_user_func($this->actions[$action]); |
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} |
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else { |
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raise_error(array('code' => 524, 'type' => 'php', |
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'file' => __FILE__, 'line' => __LINE__, |
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'message' => "No handler found for action $action"), true, true); |
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} |
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} |
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/** |
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* Register a handler function for template objects |
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* |
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* @param string $name Object name |
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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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*/ |
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public function register_handler($name, $owner, $callback) |
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{ |
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// check name |
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if (strpos($name, 'plugin.') !== 0) |
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$name = 'plugin.'.$name; |
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// can register handler only if it's not taken or registered by myself |
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if (!isset($this->objectsmap[$name]) || $this->objectsmap[$name] == $owner) { |
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$this->output->add_handler($name, $callback); |
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$this->objectsmap[$name] = $owner; |
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} |
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else { |
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raise_error(array('code' => 525, 'type' => 'php', |
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'file' => __FILE__, 'line' => __LINE__, |
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'message' => "Cannot register template handler $name; already taken by another plugin"), true, false); |
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} |
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} |
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/** |
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* Register this plugin to be responsible for a specific task |
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* |
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* @param string $task Task name (only characters [a-z0-9_.-] are allowed) |
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* @param string $owner Plugin name that registers this action |
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*/ |
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public function register_task($task, $owner) |
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{ |
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if ($task != asciiwords($task)) { |
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raise_error(array('code' => 526, 'type' => 'php', |
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'file' => __FILE__, 'line' => __LINE__, |
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'message' => "Invalid task name: $task. Only characters [a-z0-9_.-] are allowed"), true, false); |
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} |
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else if (in_array($task, rcmail::$main_tasks)) { |
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raise_error(array('code' => 526, 'type' => 'php', |
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'file' => __FILE__, 'line' => __LINE__, |
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'message' => "Cannot register taks $task; already taken by another plugin or the application itself"), true, false); |
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} |
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else { |
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$this->tasks[$task] = $owner; |
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rcmail::$main_tasks[] = $task; |
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return true; |
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} |
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return false; |
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} |
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|
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/** |
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* Checks whether the given task is registered by a plugin |
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* |
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* @param string $task Task name |
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* @return boolean True if registered, otherwise false |
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*/ |
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public function is_plugin_task($task) |
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{ |
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return $this->tasks[$task] ? true : false; |
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} |
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/** |
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* Check if a plugin hook is currently processing. |
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* Mainly used to prevent loops and recursion. |
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* |
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* @param string $hook Hook to check (optional) |
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* @return boolean True if any/the given hook is currently processed, otherwise false |
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*/ |
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public function is_processing($hook = null) |
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{ |
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return $this->active_hook && (!$hook || $this->active_hook == $hook); |
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} |
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|
cc97ea
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/** |
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* Include a plugin script file in the current HTML page |
5c461b
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* |
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* @param string $fn Path to script |
cc97ea
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*/ |
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public function include_script($fn) |
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{ |
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if ($this->output->type == 'html') { |
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$src = $this->resource_url($fn); |
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$this->output->add_header(html::tag('script', array('type' => "text/javascript", 'src' => $src))); |
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} |
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} |
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|
cc97ea
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/** |
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* Include a plugin stylesheet in the current HTML page |
5c461b
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* |
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* @param string $fn Path to stylesheet |
cc97ea
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*/ |
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public function include_stylesheet($fn) |
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{ |
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if ($this->output->type == 'html') { |
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$src = $this->resource_url($fn); |
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$this->output->include_css($src); |
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} |
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} |
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|
cc97ea
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/** |
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* Save the given HTML content to be added to a template container |
5c461b
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* |
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* @param string $html HTML content |
|
421 |
* @param string $container Template container identifier |
cc97ea
|
422 |
*/ |
T |
423 |
public function add_content($html, $container) |
|
424 |
{ |
|
425 |
$this->template_contents[$container] .= $html . "\n"; |
|
426 |
} |
8ec1b9
|
427 |
|
A |
428 |
|
cc97ea
|
429 |
/** |
8703b0
|
430 |
* Returns list of loaded plugins names |
A |
431 |
* |
|
432 |
* @return array List of plugin names |
|
433 |
*/ |
|
434 |
public function loaded_plugins() |
|
435 |
{ |
|
436 |
return array_keys($this->plugins); |
|
437 |
} |
|
438 |
|
|
439 |
|
|
440 |
/** |
cc97ea
|
441 |
* Callback for template_container hooks |
5c461b
|
442 |
* |
A |
443 |
* @param array $attrib |
|
444 |
* @return array |
cc97ea
|
445 |
*/ |
T |
446 |
private function template_container_hook($attrib) |
|
447 |
{ |
|
448 |
$container = $attrib['name']; |
8448fc
|
449 |
return array('content' => $attrib['content'] . $this->template_contents[$container]); |
cc97ea
|
450 |
} |
8ec1b9
|
451 |
|
A |
452 |
|
cc97ea
|
453 |
/** |
T |
454 |
* Make the given file name link into the plugins directory |
5c461b
|
455 |
* |
A |
456 |
* @param string $fn Filename |
|
457 |
* @return string |
cc97ea
|
458 |
*/ |
eb6f19
|
459 |
private function resource_url($fn) |
cc97ea
|
460 |
{ |
23a2ee
|
461 |
if ($fn[0] != '/' && !preg_match('|^https?://|i', $fn)) |
cc97ea
|
462 |
return $this->url . $fn; |
T |
463 |
else |
|
464 |
return $fn; |
|
465 |
} |
|
466 |
|
|
467 |
} |