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kolab_storage.php
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kolab_storage.php
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<?php
/**
* Kolab storage class providing static methods to access groupware objects on a Kolab server.
*
* @version @package_version@
* @author Thomas Bruederli <bruederli@kolabsys.com>
*
* Copyright (C) 2012, Kolab Systems AG <contact@kolabsys.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
class kolab_storage
{
const CTYPE_KEY = '/shared/vendor/kolab/folder-type';
const SERVERSIDE_SUBSCRIPTION = 0;
const CLIENTSIDE_SUBSCRIPTION = 1;
public static $last_error;
private static $ready = false;
private static $config;
private static $cache;
private static $imap;
/**
* Setup the environment needed by the libs
*/
public static function setup()
{
if (self::$ready)
return true;
$rcmail = rcube::get_instance();
self::$config = $rcmail->config;
self::$imap = $rcmail->get_storage();
self::$ready = class_exists('kolabformat') &&
(self::$imap->get_capability('METADATA') || self::$imap->get_capability('ANNOTATEMORE') || self::$imap->get_capability('ANNOTATEMORE2'));
if (self::$ready) {
// set imap options
self::$imap->set_options(array(
'skip_deleted' => true,
'threading' => false,
));
self::$imap->set_pagesize(9999);
}
return self::$ready;
}
/**
* Get a list of storage folders for the given data type
*
* @param string Data type to list folders for (contact,distribution-list,event,task,note)
*
* @return array List of Kolab_Folder objects (folder names in UTF7-IMAP)
*/
public static function get_folders($type)
{
$folders = $folderdata = array();
if (self::setup()) {
foreach ((array)self::list_folders('', '*', $type, false, $folderdata) as $foldername) {
$folders[$foldername] = new kolab_storage_folder($foldername, $folderdata[$foldername]);
}
}
return $folders;
}
/**
* Getter for a specific storage folder
*
* @param string IMAP folder to access (UTF7-IMAP)
* @return object kolab_storage_folder The folder object
*/
public static function get_folder($folder)
{
return self::setup() ? new kolab_storage_folder($folder) : null;
}
/**
* Getter for a single Kolab object, identified by its UID.
* This will search all folders storing objects of the given type.
*
* @param string Object UID
* @param string Object type (contact,distribution-list,event,task,note)
* @return array The Kolab object represented as hash array or false if not found
*/
public static function get_object($uid, $type)
{
self::setup();
$folder = null;
foreach ((array)self::list_folders('', '*', $type) as $foldername) {
if (!$folder)
$folder = new kolab_storage_folder($foldername);
else
$folder->set_folder($foldername);
if ($object = $folder->get_object($uid))
return $object;
}
return false;
}
/**
*
*/
public static function get_freebusy_server()
{
return unslashify(self::$config->get('kolab_freebusy_server', 'https://' . $_SESSION['imap_host'] . '/freebusy'));
}
/**
* Compose an URL to query the free/busy status for the given user
*/
public static function get_freebusy_url($email)
{
return self::get_freebusy_server() . '/' . $email . '.ifb';
}
/**
* Creates folder ID from folder name
*
* @param string $folder Folder name (UTF7-IMAP)
*
* @return string Folder ID string
*/
public static function folder_id($folder)
{
return asciiwords(strtr($folder, '/.-', '___'));
}
/**
* Deletes IMAP folder
*
* @param string $name Folder name (UTF7-IMAP)
*
* @return bool True on success, false on failure
*/
public static function folder_delete($name)
{
self::setup();
$success = self::$imap->delete_folder($name);
self::$last_error = self::$imap->get_error_str();
return $success;
}
/**
* Creates IMAP folder
*
* @param string $name Folder name (UTF7-IMAP)
* @param string $type Folder type
* @param bool $default True if older is default (for specified type)
*
* @return bool True on success, false on failure
*/
public static function folder_create($name, $type=null, $default=false)
{
self::setup();
if (self::$imap->create_folder($name)) {
// set metadata for folder type
$ctype = $type . ($default ? '.default' : '');
$saved = self::$imap->set_metadata($name, array(self::CTYPE_KEY => $ctype));
if ($saved)
return true;
else // revert if metadata could not be set
self::$imap->delete_folder($name);
}
self::$last_error = self::$imap->get_error_str();
return false;
}
/**
* Renames IMAP folder
*
* @param string $oldname Old folder name (UTF7-IMAP)
* @param string $newname New folder name (UTF7-IMAP)
*
* @return bool True on success, false on failure
*/
public static function folder_rename($oldname, $newname)
{
self::setup();
$success = self::$imap->rename_folder($oldname, $newname);
self::$last_error = self::$imap->get_error_str();
return $success;
}
/**
* Getter for human-readable name of Kolab object (folder)
* See http://wiki.kolab.org/UI-Concepts/Folder-Listing for reference
*
* @param string $folder IMAP folder name (UTF7-IMAP)
* @param string $folder_ns Will be set to namespace name of the folder
*
* @return string Name of the folder-object
*/
public static function object_name($folder, &$folder_ns=null)
{
self::setup();
$found = false;
$namespace = self::$imap->get_namespace();
if (!empty($namespace['shared'])) {
foreach ($namespace['shared'] as $ns) {
if (strlen($ns[0]) && strpos($folder, $ns[0]) === 0) {
$prefix = '';
$folder = substr($folder, strlen($ns[0]));
$delim = $ns[1];
$found = true;
$folder_ns = 'shared';
break;
}
}
}
if (!$found && !empty($namespace['other'])) {
foreach ($namespace['other'] as $ns) {
if (strlen($ns[0]) && strpos($folder, $ns[0]) === 0) {
// remove namespace prefix
$folder = substr($folder, strlen($ns[0]));
$delim = $ns[1];
// get username
$pos = strpos($folder, $delim);
if ($pos) {
$prefix = '('.substr($folder, 0, $pos).') ';
$folder = substr($folder, $pos+1);
}
else {
$prefix = '('.$folder.')';
$folder = '';
}
$found = true;
$folder_ns = 'other';
break;
}
}
}
if (!$found && !empty($namespace['personal'])) {
foreach ($namespace['personal'] as $ns) {
if (strlen($ns[0]) && strpos($folder, $ns[0]) === 0) {
// remove namespace prefix
$folder = substr($folder, strlen($ns[0]));
$prefix = '';
$delim = $ns[1];
$found = true;
break;
}
}
}
if (empty($delim))
$delim = self::$imap->get_hierarchy_delimiter();
$folder = rcube_charset::convert($folder, 'UTF7-IMAP');
$folder = str_replace($delim, ' &raquo; ', $folder);
if ($prefix)
$folder = $prefix . ' ' . $folder;
if (!$folder_ns)
$folder_ns = 'personal';
return $folder;
}
/**
* Creates a SELECT field with folders list
*
* @param string $type Folder type
* @param array $attrs SELECT field attributes (e.g. name)
* @param string $current The name of current folder (to skip it)
*
* @return html_select SELECT object
*/
public static function folder_selector($type, $attrs, $current = '')
{
// get all folders of specified type
$folders = self::get_folders($type);
$delim = self::$imap->get_hierarchy_delimiter();
$names = array();
$len = strlen($current);
if ($len && ($rpos = strrpos($current, $delim))) {
$parent = substr($current, 0, $rpos);
$p_len = strlen($parent);
}
// Filter folders list
foreach ($folders as $c_folder) {
$name = $c_folder->name;
// skip current folder and it's subfolders
if ($len && ($name == $current || strpos($name, $current.$delim) === 0)) {
continue;
}
// always show the parent of current folder
if ($p_len && $name == $parent) { }
// skip folders where user have no rights to create subfolders
else if ($c_folder->get_owner() != $_SESSION['username']) {
$rights = $c_folder->get_myrights();
if (!preg_match('/[ck]/', $rights)) {
continue;
}
}
$names[$name] = rcube_charset::convert($name, 'UTF7-IMAP');
}
// Make sure parent folder is listed (might be skipped e.g. if it's namespace root)
if ($p_len && !isset($names[$parent])) {
$names[$parent] = rcube_charset::convert($parent, 'UTF7-IMAP');
}
// Sort folders list
asort($names, SORT_LOCALE_STRING);
$folders = array_keys($names);
$names = array();
// Build SELECT field of parent folder
$select = new html_select($attrs);
$select->add('---', '');
foreach ($folders as $name) {
$imap_name = $name;
$name = $origname = self::object_name($name);
// find folder prefix to truncate
for ($i = count($names)-1; $i >= 0; $i--) {
if (strpos($name, $names[$i].' &raquo; ') === 0) {
$length = strlen($names[$i].' &raquo; ');
$prefix = substr($name, 0, $length);
$count = count(explode(' &raquo; ', $prefix));
$name = str_repeat('&nbsp;&nbsp;', $count-1) . '&raquo; ' . substr($name, $length);
break;
}
}
$names[] = $origname;
$select->add($name, $imap_name);
}
return $select;
}
/**
* Returns a list of folder names
*
* @param string Optional root folder
* @param string Optional name pattern
* @param string Data type to list folders for (contact,distribution-list,event,task,note,mail)
* @param string Enable to return subscribed folders only
* @param array Will be filled with folder-types data
*
* @return array List of folders
*/
public static function list_folders($root = '', $mbox = '*', $filter = null, $subscribed = false, &$folderdata = array())
{
if (!self::setup()) {
return null;
}
if (!$filter) {
// Get ALL folders list, standard way
if ($subscribed) {
return self::$imap->list_folders_subscribed($root, $mbox);
}
else {
return self::$imap->list_folders($root, $mbox);
}
}
$prefix = $root . $mbox;
// get folders types
$folderdata = self::$imap->get_metadata($prefix, self::CTYPE_KEY);
if (!is_array($folderdata)) {
return array();
}
$folderdata = array_map('implode', $folderdata);
$regexp = '/^' . preg_quote($filter, '/') . '(\..+)?$/';
// In some conditions we can skip LIST command (?)
if ($subscribed == false && $filter != 'mail' && $prefix == '*') {
foreach ($folderdata as $folder => $type) {
if (!preg_match($regexp, $type)) {
unset($folderdata[$folder]);
}
}
return array_keys($folderdata);
}
// Get folders list
if ($subscribed) {
$folders = self::$imap->list_folders_subscribed_direct($root, $mbox);
}
else {
$folders = self::$imap->list_folders_direct($root, $mbox);
}
// In case of an error, return empty list (?)
if (!is_array($folders)) {
return array();
}
// Filter folders list
foreach ($folders as $idx => $folder) {
$type = $folderdata[$folder];
if ($filter == 'mail' && empty($type)) {
continue;
}
if (empty($type) || !preg_match($regexp, $type)) {
unset($folders[$idx]);
}
}
return $folders;
}
}

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