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<?php
/*
+-----------------------------------------------------------------------+
| program/include/rcube_plugin.php |
| |
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2008-2009, 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: |
| Abstract plugins interface/class |
| All plugins need to extend this class |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
*/
/**
* Plugin interface class
*
* @package PluginAPI
*/
abstract class rcube_plugin
{
/**
* Class name of the plugin instance
*
* @var string
*/
public $ID;
/**
* Instance of Plugin API
*
* @var rcube_plugin_api
*/
public $api;
/**
* Regular expression defining task(s) to bind with
*
* @var string
*/
public $task;
/**
* Disables plugin in AJAX requests
*
* @var boolean
*/
public $noajax = false;
/**
* Disables plugin in framed mode
*
* @var boolean
*/
public $noframe = false;
protected $home;
protected $urlbase;
private $mytask;
/**
* Default constructor.
*
* @param rcube_plugin_api $api Plugin API
*/
public function __construct($api)
{
$this->ID = get_class($this);
$this->api = $api;
$this->home = $api->dir . $this->ID;
$this->urlbase = $api->url . $this->ID . '/';
}
/**
* Initialization method, needs to be implemented by the plugin itself
*/
abstract function init();
/**
* Attempt to load the given plugin which is required for the current plugin
*
* @param string Plugin name
* @return boolean True on success, false on failure
*/
public function require_plugin($plugin_name)
{
return $this->api->load_plugin($plugin_name);
}
/**
* Load local config file from plugins directory.
* The loaded values are patched over the global configuration.
*
* @param string $fname Config file name relative to the plugin's folder
* @return boolean True on success, false on failure
*/
public function load_config($fname = 'config.inc.php')
{
$fpath = $this->home.'/'.$fname;
$rcube = rcube::get_instance();
if (is_file($fpath) && !$rcube->config->load_from_file($fpath)) {
rcube::raise_error(array(
'code' => 527, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Failed to load config from $fpath"), true, false);
return false;
}
return true;
}
/**
* Register a callback function for a specific (server-side) hook
*
* @param string $hook Hook name
* @param mixed $callback Callback function as string or array with object reference and method name
*/
public function add_hook($hook, $callback)
{
$this->api->register_hook($hook, $callback);
}
/**
* Unregister a callback function for a specific (server-side) hook.
*
* @param string $hook Hook name
* @param mixed $callback Callback function as string or array with object reference and method name
*/
public function remove_hook($hook, $callback)
{
$this->api->unregister_hook($hook, $callback);
}
/**
* Load localized texts from the plugins dir
*
* @param string $dir Directory to search in
* @param mixed $add2client Make texts also available on the client (array with list or true for all)
*/
public function add_texts($dir, $add2client = false)
{
$domain = $this->ID;
$lang = $_SESSION['language'];
$langs = array_unique(array('en_US', $lang));
$locdir = slashify(realpath(slashify($this->home) . $dir));
$texts = array();
// Language aliases used to find localization in similar lang, see below
$aliases = array(
'de_CH' => 'de_DE',
'es_AR' => 'es_ES',
'fa_AF' => 'fa_IR',
'nl_BE' => 'nl_NL',
'pt_BR' => 'pt_PT',
'zh_CN' => 'zh_TW',
);
// use buffering to handle empty lines/spaces after closing PHP tag
ob_start();
foreach ($langs as $lng) {
$fpath = $locdir . $lng . '.inc';
if (is_file($fpath) && is_readable($fpath)) {
include $fpath;
$texts = (array)$labels + (array)$messages + (array)$texts;
}
else if ($lng != 'en_US') {
// Find localization in similar language (#1488401)
$alias = null;
if (!empty($aliases[$lng])) {
$alias = $aliases[$lng];
}
else if ($key = array_search($lng, $aliases)) {
$alias = $key;
}
if (!empty($alias)) {
$fpath = $locdir . $alias . '.inc';
if (is_file($fpath) && is_readable($fpath)) {
include $fpath;
$texts = (array)$labels + (array)$messages + (array)$texts;
}
}
}
}
ob_end_clean();
// prepend domain to text keys and add to the application texts repository
if (!empty($texts)) {
$add = array();
foreach ($texts as $key => $value)
$add[$domain.'.'.$key] = $value;
$rcmail = rcmail::get_instance();
$rcmail->load_language($lang, $add);
// add labels to client
if ($add2client) {
$js_labels = is_array($add2client) ? array_map(array($this, 'label_map_callback'), $add2client) : array_keys($add);
$rcmail->output->add_label($js_labels);
}
}
}
/**
* Wrapper for rcmail::gettext() adding the plugin ID as domain
*
* @param string $p Message identifier
* @return string Localized text
* @see rcmail::gettext()
*/
public function gettext($p)
{
return rcube::get_instance()->gettext($p, $this->ID);
}
/**
* Register this plugin to be responsible for a specific task
*
* @param string $task Task name (only characters [a-z0-9_.-] are allowed)
*/
public function register_task($task)
{
if ($this->api->register_task($task, $this->ID))
$this->mytask = $task;
}
/**
* Register a handler for a specific client-request action
*
* The callback will be executed upon a request like /?_task=mail&_action=plugin.myaction
*
* @param string $action Action name (should be unique)
* @param mixed $callback Callback function as string or array with object reference and method name
*/
public function register_action($action, $callback)
{
$this->api->register_action($action, $this->ID, $callback, $this->mytask);
}
/**
* Register a handler function for a template object
*
* When parsing a template for display, tags like <roundcube:object name="plugin.myobject" />
* will be replaced by the return value if the registered callback function.
*
* @param string $name Object name (should be unique and start with 'plugin.')
* @param mixed $callback Callback function as string or array with object reference and method name
*/
public function register_handler($name, $callback)
{
$this->api->register_handler($name, $this->ID, $callback);
}
/**
* Make this javascipt file available on the client
*
* @param string $fn File path; absolute or relative to the plugin directory
*/
public function include_script($fn)
{
$this->api->include_script($this->resource_url($fn));
}
/**
* Make this stylesheet available on the client
*
* @param string $fn File path; absolute or relative to the plugin directory
*/
public function include_stylesheet($fn)
{
$this->api->include_stylesheet($this->resource_url($fn));
}
/**
* Append a button to a certain container
*
* @param array $p Hash array with named parameters (as used in skin templates)
* @param string $container Container name where the buttons should be added to
* @see rcube_remplate::button()
*/
public function add_button($p, $container)
{
if ($this->api->output->type == 'html') {
// fix relative paths
foreach (array('imagepas', 'imageact', 'imagesel') as $key)
if ($p[$key])
$p[$key] = $this->api->url . $this->resource_url($p[$key]);
$this->api->add_content($this->api->output->button($p), $container);
}
}
/**
* Generate an absolute URL to the given resource within the current
* plugin directory
*
* @param string $fn The file name
* @return string Absolute URL to the given resource
*/
public function url($fn)
{
return $this->api->url . $this->resource_url($fn);
}
/**
* Make the given file name link into the plugin directory
*
* @param string $fn Filename
*/
private function resource_url($fn)
{
if ($fn[0] != '/' && !preg_match('|^https?://|i', $fn))
return $this->ID . '/' . $fn;
else
return $fn;
}
/**
* Provide path to the currently selected skin folder within the plugin directory
* with a fallback to the default skin folder.
*
* @return string Skin path relative to plugins directory
*/
public function local_skin_path()
{
$rcmail = rcube::get_instance();
foreach (array($rcmail->config->get('skin'),'default') as $skin) {
$skin_path = 'skins/' . $skin;
if (is_dir(realpath(slashify($this->home) . $skin_path)))
break;
}
return $skin_path;
}
/**
* Callback function for array_map
*
* @param string $key Array key.
* @return string
*/
private function label_map_callback($key)
{
return $this->ID.'.'.$key;
}
}
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