--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/program/lib/Roundcube/rcube_plugin.php	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,451 @@
+<?php
+
+/**
+ +-----------------------------------------------------------------------+
+ | This file is part of the Roundcube Webmail client                     |
+ | Copyright (C) 2008-2014, 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    Framework
+ * @subpackage 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;
+
+    /**
+     * A list of config option names that can be modified
+     * by the user via user interface (with save-prefs command)
+     *
+     * @var array
+     */
+    public $allowed_prefs;
+
+    protected $home;
+    protected $urlbase;
+    private $mytask;
+    private $loaded_config = array();
+
+
+    /**
+     * 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 . $this->ID . '/';
+    }
+
+    /**
+     * Initialization method, needs to be implemented by the plugin itself
+     */
+    abstract function init();
+
+    /**
+     * Provide information about this
+     *
+     * @return array Meta information about a plugin or false if not implemented:
+     * As hash array with the following keys:
+     *      name: The plugin name
+     *    vendor: Name of the plugin developer
+     *   version: Plugin version name
+     *   license: License name (short form according to http://spdx.org/licenses/)
+     *       uri: The URL to the plugin homepage or source repository
+     *   src_uri: Direct download URL to the source code of this plugin
+     *   require: List of plugins required for this one (as array of plugin names)
+     */
+    public static function info()
+    {
+        return false;
+    }
+
+    /**
+     * Attempt to load the given plugin which is required for the current plugin
+     *
+     * @param string Plugin name
+     * @return boolean True on success, false on failure
+     */
+    public function require_plugin($plugin_name)
+    {
+        return $this->api->load_plugin($plugin_name, true);
+    }
+
+    /**
+     * Attempt to load the given plugin which is optional for the current plugin
+     *
+     * @param string Plugin name
+     * @return boolean True on success, false on failure
+     */
+    public function include_plugin($plugin_name)
+    {
+        return $this->api->load_plugin($plugin_name, true, false);
+    }
+
+    /**
+     * 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')
+    {
+        if (in_array($fname, $this->loaded_config)) {
+            return true;
+        }
+
+        $this->loaded_config[] = $fname;
+
+        $fpath = $this->home.'/'.$fname;
+        $rcube = rcube::get_instance();
+
+        if (($is_local = 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 $fpath"), true, false);
+            return false;
+        }
+        else if (!$is_local) {
+            // Search plugin_name.inc.php file in any configured path
+            return $rcube->config->load_from_file($this->ID . '.inc.php');
+        }
+
+        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;
+            }
+
+            $rcube = rcube::get_instance();
+            $rcube->load_language($lang, $add);
+
+            // add labels to client
+            if ($add2client && method_exists($rcube->output, 'add_label')) {
+                if (is_array($add2client)) {
+                    $js_labels = array_map(array($this, 'label_map_callback'), $add2client);
+                }
+                else {
+                    $js_labels = array_keys($add);
+                }
+                $rcube->output->add_label($js_labels);
+            }
+        }
+    }
+
+    /**
+     * Wrapper for add_label() adding the plugin ID as domain
+     */
+    public function add_label()
+    {
+        $rcube = rcube::get_instance();
+
+        if (method_exists($rcube->output, 'add_label')) {
+            $args = func_get_args();
+            if (count($args) == 1 && is_array($args[0])) {
+                $args = $args[0];
+            }
+
+            $args = array_map(array($this, 'label_map_callback'), $args);
+            $rcube->output->add_label($args);
+        }
+    }
+
+    /**
+     * Wrapper for rcube::gettext() adding the plugin ID as domain
+     *
+     * @param string $p Message identifier
+     *
+     * @return string Localized text
+     * @see rcube::gettext()
+     */
+    public function gettext($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()
+    {
+        $rcube = rcube::get_instance();
+        $skins = array_keys((array)$rcube->output->skins);
+        if (empty($skins)) {
+            $skins = (array) $rcube->config->get('skin');
+        }
+        foreach ($skins 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)
+    {
+        if (strpos($key, $this->ID.'.') === 0) {
+            return $key;
+        }
+
+        return $this->ID.'.'.$key;
+    }
+}