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kolab_storage_folder.php
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kolab_storage_folder.php
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<?php
/**
* The kolab_storage_folder class represents an IMAP folder on the 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_folder
{
const KTYPE_PREFIX = 'application/x-vnd.kolab.';
/**
* The folder name.
*
* @var string
*/
public $name;
/**
* The type of this folder.
*
* @var string
*/
public $type;
private $type_annotation;
private $subpath;
private $imap;
private $info;
private $owner;
private $uid2msg = array();
/**
* Default constructor
*/
function __construct($name, $imap = null)
{
$this->name = $name;
$this->imap = is_object($imap) ? $imap : rcmail::get_instance()->get_storage();
$this->imap->set_folder($this->name);
$metadata = $this->imap->get_metadata($this->name, array(kolab_storage::CTYPE_KEY));
$this->type_annotation = $metadata[$this->name][kolab_storage::CTYPE_KEY];
$this->type = reset(explode('.', $this->type_annotation));
}
/**
*
*/
private function get_folder_info()
{
if (!isset($this->info))
$this->info = $this->imap->folder_info($this->name);
return $this->info;
}
/**
* Returns the owner of the folder.
*
* @return string The owner of this folder.
*/
public function get_owner()
{
// return cached value
if (isset($this->owner))
return $this->owner;
$info = $this->get_folder_info();
$rcmail = rcmail::get_instance();
switch ($info['namespace']) {
case 'personal':
$this->owner = $rcmail->user->get_username();
break;
case 'shared':
$this->owner = 'anonymous';
break;
default:
$owner = '';
list($prefix, $user) = explode($this->imap->get_hierarchy_delimiter(), $info['name']);
if (strpos($user, '@') === false) {
$domain = strstr($rcmail->user->get_username(), '@');
if (!empty($domain))
$user .= $domain;
}
$this->owner = $user;
break;
}
return $this->owner;
}
/**
* Getter for the name of the namespace to which the IMAP folder belongs
*
* @return string Name of the namespace (personal, other, shared)
*/
public function get_namespace()
{
return $this->imap->folder_namespace($this->name);
}
/**
* Get IMAP ACL information for this folder
*
* @return string Permissions as string
*/
public function get_acl()
{
return join('', (array)$this->imap->get_acl($this->name));
}
/**
* Get number of objects stored in this folder
*
* @param string $type Object type (e.g. contact, event, todo, journal, note, configuration)
* @return integer The number of objects of the given type
*/
public function count($type = null)
{
if (!$type) $type = $this->type;
// search by object type
$ctype = self::KTYPE_PREFIX . $type;
$index = $this->imap->search_once($this->name, 'HEADER X-Kolab-Type ' . $ctype);
return $index->count();
}
/**
* List all Kolab objects of the given type
*
* @param string $type Object type (e.g. contact, event, todo, journal, note, configuration)
* @return array List of Kolab data objects (each represented as hash array)
*/
public function get_objects($type = null)
{
if (!$type) $type = $this->type;
// search by object type
$ctype = self::KTYPE_PREFIX . $type;
$search = 'HEADER X-Kolab-Type ' . $ctype;
$index = $this->imap->search_once($this->name, $search);
$results = array();
// fetch all messages from IMAP
foreach ($index->get() as $msguid) {
if ($object = $this->read_object($msguid, $type)) {
$results[] = $object;
$this->uid2msg[$object['uid']] = $msguid;
}
}
// TODO: write $this->uid2msg to cache
return $results;
}
/**
* Getter for a single Kolab object, identified by its UID
*
* @param string Object UID
* @return array The Kolab object represented as hash array
*/
public function get_object($uid)
{
$msguid = $this->uid2msguid($uid);
if ($msguid && ($object = $this->read_object($msguid)))
return $object;
return array('uid' => $uid);
}
/**
* Fetch a Kolab object attachment which is stored in a separate part
* of the mail MIME message that represents the Kolab record.
*
* @param string Object's UID
* @param string The attachment's mime number
* @param string IMAP folder where message is stored;
* If set, that also implies that the given UID is an IMAP UID
* @return mixed The attachment content as binary string
*/
public function get_attachment($uid, $part, $mailbox = null)
{
if ($msguid = ($mailbox ? $uid : $this->uid2msguid($uid))) {
if ($mailbox)
$this->imap->set_folder($mailbox);
return $this->imap->get_message_part($msguid, $part);
}
return null;
}
/**
* Fetch the mime message from the storage server and extract
* the Kolab groupware object from it
*
* @param string The IMAP message UID to fetch
* @param string The object type expected
* @return array Hash array representing the Kolab object
*/
private function read_object($msguid, $type = null, $folder = null)
{
if (!$type) $type = $this->type;
if (!$folder) $folder = $this->name;
$ctype= self::KTYPE_PREFIX . $type;
$this->imap->set_folder($folder);
$message = new rcube_message($msguid);
$attachments = array();
// get XML part
foreach ((array)$message->attachments as $part) {
if (!$xml && ($part->mimetype == $ctype || preg_match('!application/([a-z]+\+)?xml!', $part->mimetype))) {
$xml = $part->body ? $part->body : $message->get_part_content($part->mime_id);
}
else if ($part->filename) {
$attachments[$part->filename] = array(
'key' => $part->mime_id,
'type' => $part->mimetype,
'size' => $part->size,
);
}
}
if (!$xml) {
raise_error(array(
'code' => 600,
'type' => 'php',
'file' => __FILE__,
'line' => __LINE__,
'message' => "Could not find Kolab data part in message " . $this->name . ':' . $uid,
), true);
return false;
}
$format = kolab_format::factory($type);
// check kolab format version
if (strpos($xml, '<' . $type) !== false) {
// old Kolab 2.0 format detected
$handler = Horde_Kolab_Format::factory('XML', $type);
if (is_object($handler) && is_a($handler, 'PEAR_Error')) {
continue;
}
// XML-to-array
$object = $handler->load($xml);
$format->fromkolab2($object);
}
else {
// load Kolab 3 format using libkolabxml
$format->load($xml);
}
if ($format->is_valid()) {
$object = $format->to_array();
$object['_msguid'] = $msguid;
$object['_mailbox'] = $this->name;
$object['_attachments'] = $attachments;
return $object;
}
return false;
}
/**
* Save an object in this folder.
*
* @param array $object The array that holds the data of the object.
* @param string $type The type of the kolab object.
* @param string $uid The UID of the old object if it existed before
* @return boolean True on success, false on error
*/
public function save(&$object, $type, $uid = null)
{
if (!$type)
$type = $this->type;
// copy attachments from old message
if (!empty($object['_msguid']) && ($old = $this->read_object($object['_msguid'], $type, $object['_mailbox']))) {
foreach ($old['_attachments'] as $name => $att) {
if (!isset($object['_attachments'][$name])) {
$object['_attachments'][$name] = $old['_attachments'][$name];
}
// load photo.attachment contents to be directly embedded in xcard block
if ($name == 'photo.attachment' && !$object['_attachments'][$name]['content'] && $att['key'])
$object['_attachments'][$name]['content'] = $this->get_attachment($object['_msguid'], $att['key'], $object['_mailbox']);
}
}
if ($raw_msg = $this->build_message($object, $type)) {
$result = $this->imap->save_message($this->name, $raw_msg, '', false);
// delete old message
if ($result && !empty($object['_msguid']) && !empty($object['_mailbox'])) {
$this->imap->delete_message($object['_msguid'], $object['_mailbox']);
}
else if ($result && $uid && ($msguid = $this->uid2msguid($uid))) {
$this->imap->delete_message($msguid, $this->name);
}
// TODO: update cache with new UID
$this->uid2msg[$object['uid']] = $result;
}
return $result;
}
/**
* Delete the specified object from this folder.
*
* @param mixed $object The Kolab object to delete or object UID
* @param boolean $trigger Should the folder be triggered?
* @param boolean $expunge Should the folder be expunged?
*
* @return boolean True if successful, false on error
*/
public function delete($object, $expunge = true, $trigger = true)
{
if ($msguid = is_array($object) ? $object['_msguid'] : $this->uid2msguid($object)) {
return $this->imap->delete_message($msguid, $this->name);
}
return false;
}
/**
*
*/
public function delete_all()
{
return $this->imap->clear_folder($this->name);
}
/**
* Restore a previously deleted object
*
* @param string Object UID
* @return mixed Message UID on success, false on error
*/
public function undelete($uid)
{
// TODO: implement this
return false;
}
/**
* Resolve an object UID into an IMAP message UID
*/
private function uid2msguid($uid)
{
if (!isset($this->uid2msg[$uid])) {
// use IMAP SEARCH to get the right message
$index = $this->imap->search_once($this->name, 'HEADER SUBJECT ' . $uid);
$results = $index->get();
$this->uid2msg[$uid] = $results[0];
// TODO: cache this lookup
}
return $this->uid2msg[$uid];
}
/**
* Creates source of the configuration object message
*/
private function build_message(&$object, $type)
{
$format = kolab_format::factory($type);
$format->set($object);
$xml = $format->write();
if (!$format->is_valid()) {
return false;
}
$mime = new Mail_mime("\r\n");
$rcmail = rcmail::get_instance();
$headers = array();
if ($ident = $rcmail->user->get_identity()) {
$headers['From'] = $ident['email'];
$headers['To'] = $ident['email'];
}
$headers['Date'] = date('r');
$headers['X-Kolab-Type'] = self::KTYPE_PREFIX . $type;
$headers['Subject'] = $object['uid'];
// $headers['Message-ID'] = rcmail_gen_message_id();
$headers['User-Agent'] = $rcmail->config->get('useragent');
$mime->headers($headers);
$mime->setTXTBody('This is a Kolab Groupware object. '
. 'To view this object you will need an email client that understands the Kolab Groupware format. '
. "For a list of such email clients please visit http://www.kolab.org/kolab2-clients.html\n\n");
$mime->addAttachment($xml,
$format->CTYPE,
'kolab.xml',
false, '8bit', 'attachment', RCMAIL_CHARSET, '', '',
$rcmail->config->get('mime_param_folding') ? 'quoted-printable' : null,
$rcmail->config->get('mime_param_folding') == 2 ? 'quoted-printable' : null,
'', RCMAIL_CHARSET
);
// save object attachments as separate parts
// TODO: optimize memory consumption by using tempfiles for transfer
foreach ((array)$object['_attachments'] as $name => $att) {
if (empty($att['content']) && !empty($att['key'])) {
$msguid = !empty($object['_msguid']) ? $object['_msguid'] : $object['uid'];
$att['content'] = $this->get_attachment($msguid, $att['key'], $object['_mailbox']);
}
if (!empty($att['content'])) {
$mime->addAttachment($att['content'], $att['type'], $name, false);
}
}
return $mime->getMessage();
}
/**
* Triggers any required updates after changes within the
* folder. This is currently only required for handling free/busy
* information with Kolab.
*
* @return boolean|PEAR_Error True if successfull.
*/
public function trigger()
{
$owner = $this->get_owner();
switch($this->type) {
case 'event':
$url = sprintf('%s/trigger/%s/%s.pfb', kolab_storage::get_freebusy_server(), $owner, $this->subpath);
break;
default:
return true;
}
$result = $this->trigger_url($url);
if (is_a($result, 'PEAR_Error')) {
return PEAR::raiseError(sprintf("Failed triggering folder %s. Error was: %s"),
$this->name, $result->getMessage());
}
return $result;
}
/**
* Triggers a URL.
*
* @param string $url The URL to be triggered.
* @return boolean|PEAR_Error True if successfull.
*/
private function trigger_url($url)
{
// TBD.
return PEAR::raiseError("Feature not implemented.");
}
/* Legacy methods to keep compatibility with the old Horde Kolab_Storage classes */
/**
* Compatibility method
*/
public function getOwner()
{
console("Call to deprecated method kolab_storage_folder::getOwner()");
return $this->get_owner();
}
/**
* Get IMAP ACL information for this folder
*/
public function getMyRights()
{
return $this->get_acl();
}
/**
* NOP to stay compatible with the formerly used Horde classes
*/
public function getData()
{
return $this;
}
/**
* List all Kolab objects of the given type
*/
public function getObjects($type = null)
{
return $this->get_objects($type);
}
/**
* Getter for a single Kolab object, identified by its UID
*/
public function getObject($uid)
{
return $this->get_object($uid);
}
/**
*
*/
public function getAttachment($key)
{
PEAR::raiseError("Call to deprecated method not returning anything.");
return null;
}
/**
* Alias function of delete()
*/
public function deleteMessage($id, $trigger = true, $expunge = true)
{
return $this->delete(array('_msguid' => $id), $trigger, $expunge);
}
/**
*
*/
public function deleteAll()
{
return $this->delete_all();
}
}

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