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diff --git a/lib/kolab_sync_data.php b/lib/kolab_sync_data.php
index 91a4362..6ee7eb0 100644
--- a/lib/kolab_sync_data.php
+++ b/lib/kolab_sync_data.php
@@ -1,1995 +1,2003 @@
<?php
/**
+--------------------------------------------------------------------------+
| Kolab Sync (ActiveSync for Kolab) |
| |
| Copyright (C) 2011-2012, 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/> |
+--------------------------------------------------------------------------+
| Author: Aleksander Machniak <machniak@kolabsys.com> |
+--------------------------------------------------------------------------+
*/
/**
* Base class for Syncroton data backends
*/
abstract class kolab_sync_data implements Syncroton_Data_IData
{
/**
* ActiveSync protocol version
*
* @var int
*/
protected $asversion = 0;
/**
* information about the current device
*
* @var Syncroton_Model_IDevice
*/
protected $device;
/**
* timestamp to use for all sync requests
*
* @var DateTime
*/
protected $syncTimeStamp;
/**
* name of model to use
*
* @var string
*/
protected $modelName;
/**
* type of the default folder
*
* @var int
*/
protected $defaultFolderType;
/**
* default container for new entries
*
* @var string
*/
protected $defaultFolder;
/**
* type of user created folders
*
* @var int
*/
protected $folderType;
/**
* Internal cache for kolab_storage folder objects
*
* @var array
*/
protected $folders = array();
/**
* Internal cache for IMAP folders list
*
* @var array
*/
protected $imap_folders = array();
/**
* Logger instance.
*
* @var kolab_sync_logger
*/
protected $logger;
/**
* Timezone
*
* @var string
*/
protected $timezone;
/**
* List of device types with multiple folders support
*
* @var array
*/
protected $ext_devices = array(
'iphone',
'ipad',
'thundertine',
'windowsphone',
'wp',
'wp8',
'playbook',
);
const RESULT_OBJECT = 0;
const RESULT_UID = 1;
const RESULT_COUNT = 2;
/**
* Recurrence types
*/
const RECUR_TYPE_DAILY = 0; // Recurs daily.
const RECUR_TYPE_WEEKLY = 1; // Recurs weekly
const RECUR_TYPE_MONTHLY = 2; // Recurs monthly
const RECUR_TYPE_MONTHLY_DAYN = 3; // Recurs monthly on the nth day
const RECUR_TYPE_YEARLY = 5; // Recurs yearly
const RECUR_TYPE_YEARLY_DAYN = 6; // Recurs yearly on the nth day
/**
* Day of week constants
*/
const RECUR_DOW_SUNDAY = 1;
const RECUR_DOW_MONDAY = 2;
const RECUR_DOW_TUESDAY = 4;
const RECUR_DOW_WEDNESDAY = 8;
const RECUR_DOW_THURSDAY = 16;
const RECUR_DOW_FRIDAY = 32;
const RECUR_DOW_SATURDAY = 64;
const RECUR_DOW_LAST = 127; // The last day of the month. Used as a special value in monthly or yearly recurrences.
/**
* Mapping of recurrence types
*
* @var array
*/
protected $recurTypeMap = array(
self::RECUR_TYPE_DAILY => 'DAILY',
self::RECUR_TYPE_WEEKLY => 'WEEKLY',
self::RECUR_TYPE_MONTHLY => 'MONTHLY',
self::RECUR_TYPE_MONTHLY_DAYN => 'MONTHLY',
self::RECUR_TYPE_YEARLY => 'YEARLY',
self::RECUR_TYPE_YEARLY_DAYN => 'YEARLY',
);
/**
* Mapping of weekdays
* NOTE: ActiveSync uses a bitmask
*
* @var array
*/
protected $recurDayMap = array(
'SU' => self::RECUR_DOW_SUNDAY,
'MO' => self::RECUR_DOW_MONDAY,
'TU' => self::RECUR_DOW_TUESDAY,
'WE' => self::RECUR_DOW_WEDNESDAY,
'TH' => self::RECUR_DOW_THURSDAY,
'FR' => self::RECUR_DOW_FRIDAY,
'SA' => self::RECUR_DOW_SATURDAY,
);
/**
* the constructor
*
* @param Syncroton_Model_IDevice $device
* @param DateTime $syncTimeStamp
*/
public function __construct(Syncroton_Model_IDevice $device, DateTime $syncTimeStamp)
{
$this->backend = kolab_sync_backend::get_instance();
$this->device = $device;
$this->asversion = floatval($device->acsversion);
$this->syncTimeStamp = $syncTimeStamp;
$this->logger = Syncroton_Registry::get(Syncroton_Registry::LOGGERBACKEND);
$this->defaultRootFolder = $this->defaultFolder . '::Syncroton';
// set internal timezone of kolab_format to user timezone
try {
$this->timezone = rcube::get_instance()->config->get('timezone', 'GMT');
kolab_format::$timezone = new DateTimeZone($this->timezone);
}
catch (Exception $e) {
//rcube::raise_error($e, true);
$this->timezone = 'GMT';
kolab_format::$timezone = new DateTimeZone('GMT');
}
}
/**
* return list of supported folders for this backend
*
* @return array
*/
public function getAllFolders()
{
$list = array();
// device supports multiple folders ?
if ($this->isMultiFolder()) {
// get the folders the user has access to
$list = $this->listFolders();
}
else if ($default = $this->getDefaultFolder()) {
$list = array($default['serverId'] => $default);
}
// getAllFolders() is called only in FolderSync
// throw Syncroton_Exception_Status_FolderSync exception
if (!is_array($list)) {
throw new Syncroton_Exception_Status_FolderSync(Syncroton_Exception_Status_FolderSync::FOLDER_SERVER_ERROR);
}
foreach ($list as $idx => $folder) {
$list[$idx] = new Syncroton_Model_Folder($folder);
}
return $list;
}
/**
* Retrieve folders which were modified since last sync
*
* @param DateTime $startTimeStamp
* @param DateTime $endTimeStamp
*
* @return array List of folders
*/
public function getChangedFolders(DateTime $startTimeStamp, DateTime $endTimeStamp)
{
return array();
}
/**
* Returns true if the device supports multiple folders or it was configured so
*/
protected function isMultiFolder()
{
$config = rcube::get_instance()->config;
$blacklist = $config->get('activesync_multifolder_blacklist_' . $this->modelName);
if (!is_array($blacklist)) {
$blacklist = $config->get('activesync_multifolder_blacklist');
}
if (is_array($blacklist)) {
return !$this->deviceTypeFilter($blacklist);
}
return in_array_nocase($this->device->devicetype, $this->ext_devices);
}
/**
* Returns default folder for current class type.
*/
protected function getDefaultFolder()
{
// Check if there's any folder configured for sync
$folders = $this->listFolders();
if (empty($folders)) {
return $folders;
}
foreach ($folders as $folder) {
if ($folder['type'] == $this->defaultFolderType) {
$default = $folder;
break;
}
}
// Return first on the list if there's no default
if (empty($default)) {
$key = array_shift(array_keys($folders));
$default = $folders[$key];
// make sure the type is default here
$default['type'] = $this->defaultFolderType;
}
// Remember real folder ID and set ID/name to root folder
$default['realid'] = $default['serverId'];
$default['serverId'] = $this->defaultRootFolder;
$default['displayName'] = $this->defaultFolder;
return $default;
}
/**
* Creates a folder
*/
public function createFolder(Syncroton_Model_IFolder $folder)
{
$parentid = $folder->parentId;
$type = $folder->type;
$display_name = $folder->displayName;
if ($parentid) {
$parent = $this->backend->folder_id2name($parentid, $this->device->deviceid);
if ($parent === null) {
throw new Syncroton_Exception_Status_FolderCreate(Syncroton_Exception_Status_FolderCreate::PARENT_NOT_FOUND);
}
}
$name = rcube_charset::convert($display_name, kolab_sync::CHARSET, 'UTF7-IMAP');
if ($parent !== null) {
$rcube = rcube::get_instance();
$storage = $rcube->get_storage();
$delim = $storage->get_hierarchy_delimiter();
$name = $parent . $delim . $name;
}
// Create IMAP folder
$result = $this->backend->folder_create($name, $type, $this->device->deviceid);
if ($result) {
$folder->serverId = $this->backend->folder_id($name);
return $folder;
}
$errno = Syncroton_Exception_Status_FolderCreate::UNKNOWN_ERROR;
// Special case when client tries to create a subfolder of INBOX
// which is not possible on Cyrus-IMAP (T2223)
if ($parent == 'INBOX' && stripos($this->backend->last_error(), 'invalid') !== false) {
$errno = Syncroton_Exception_Status_FolderCreate::SPECIAL_FOLDER;
}
// Note: Looks like Outlook 2013 ignores any errors on FolderCreate command
throw new Syncroton_Exception_Status_FolderCreate($errno);
}
/**
* Updates a folder
*/
public function updateFolder(Syncroton_Model_IFolder $folder)
{
$parentid = $folder->parentId;
$type = $folder->type;
$display_name = $folder->displayName;
$old_name = $this->backend->folder_id2name($folder->serverId, $this->device->deviceid);
if ($parentid) {
$parent = $this->backend->folder_id2name($parentid, $this->device->deviceid);
}
$name = rcube_charset::convert($display_name, kolab_sync::CHARSET, 'UTF7-IMAP');
if ($parent !== null) {
$rcube = rcube::get_instance();
$storage = $rcube->get_storage();
$delim = $storage->get_hierarchy_delimiter();
$name = $parent . $delim . $name;
}
// Rename/move IMAP folder
if ($name == $old_name) {
$result = true;
// @TODO: folder type change?
}
else {
$result = $this->backend->folder_rename($old_name, $name, $type);
}
if ($result) {
return $folder;
}
// @TODO: throw exception
}
/**
* Deletes a folder
*/
public function deleteFolder($folder)
{
if ($folder instanceof Syncroton_Model_IFolder) {
$folder = $folder->serverId;
}
$name = $this->backend->folder_id2name($folder, $this->device->deviceid);
// @TODO: throw exception
return $this->backend->folder_delete($name, $this->device->deviceid);
}
/**
* Empty folder (remove all entries and optionally subfolders)
*
* @param string $folderId Folder identifier
* @param array $options Options
*/
public function emptyFolderContents($folderid, $options)
{
$folders = $this->extractFolders($folderid);
foreach ($folders as $folderid) {
$foldername = $this->backend->folder_id2name($folderid, $this->device->deviceid);
$folder = $this->getFolderObject($foldername);
if (!$folder || !$folder->valid) {
throw new Syncroton_Exception_Status_ItemOperations(Syncroton_Exception_Status_ItemOperations::ITEM_SERVER_ERROR);
}
// Remove all entries
$folder->delete_all();
// Remove subfolders
if (!empty($options['deleteSubFolders'])) {
$list = $this->listFolders($folderid);
foreach ($list as $folderid => $folder) {
$foldername = $this->backend->folder_id2name($folderid, $this->device->deviceid);
$folder = $this->getFolderObject($foldername);
if (!$folder || !$folder->valid) {
throw new Syncroton_Exception_Status_ItemOperations(Syncroton_Exception_Status_ItemOperations::ITEM_SERVER_ERROR);
}
// Remove all entries
$folder->delete_all();
}
}
}
}
/**
* Moves object into another location (folder)
*
* @param string $srcFolderId Source folder identifier
* @param string $serverId Object identifier
* @param string $dstFolderId Destination folder identifier
*
* @throws Syncroton_Exception_Status
* @return string New object identifier
*/
public function moveItem($srcFolderId, $serverId, $dstFolderId)
{
$item = $this->getObject($srcFolderId, $serverId, $folder);
if (!$item || !$folder) {
throw new Syncroton_Exception_Status_MoveItems(Syncroton_Exception_Status_MoveItems::INVALID_SOURCE);
}
$dstname = $this->backend->folder_id2name($dstFolderId, $this->device->deviceid);
if ($dstname === null) {
throw new Syncroton_Exception_Status_MoveItems(Syncroton_Exception_Status_MoveItems::INVALID_DESTINATION);
}
if (!$folder->move($serverId, $dstname)) {
throw new Syncroton_Exception_Status_MoveItems(Syncroton_Exception_Status_MoveItems::INVALID_SOURCE);
}
return $item['uid'];
}
/**
* Add entry
*
* @param string $folderId Folder identifier
* @param Syncroton_Model_IEntry $entry Entry object
*
* @return string ID of the created entry
*/
public function createEntry($folderId, Syncroton_Model_IEntry $entry)
{
$entry = $this->toKolab($entry, $folderId);
$entry = $this->createObject($folderId, $entry);
if (empty($entry)) {
throw new Syncroton_Exception_Status_Sync(Syncroton_Exception_Status_Sync::SYNC_SERVER_ERROR);
}
return $entry['_serverId'];
}
/**
* update existing entry
*
* @param string $folderId
* @param string $serverId
* @param SimpleXMLElement $entry
*
* @return string ID of the updated entry
*/
public function updateEntry($folderId, $serverId, Syncroton_Model_IEntry $entry)
{
$oldEntry = $this->getObject($folderId, $serverId);
if (empty($oldEntry)) {
throw new Syncroton_Exception_NotFound('id not found');
}
$entry = $this->toKolab($entry, $folderId, $oldEntry);
$entry = $this->updateObject($folderId, $serverId, $entry);
if (empty($entry)) {
throw new Syncroton_Exception_Status_Sync(Syncroton_Exception_Status_Sync::SYNC_SERVER_ERROR);
}
return $entry['_serverId'];
}
/**
* delete entry
*
* @param string $folderId
* @param string $serverId
* @param array $collectionData
*/
public function deleteEntry($folderId, $serverId, $collectionData)
{
$deleted = $this->deleteObject($folderId, $serverId);
if (!$deleted) {
throw new Syncroton_Exception_Status_Sync(Syncroton_Exception_Status_Sync::SYNC_SERVER_ERROR);
}
}
public function getFileReference($fileReference)
{
// to be implemented by Email data class
// @TODO: throw "unimplemented" exception here?
}
/**
* Search for existing entries
*
* @param string $folderid Folder identifier
* @param array $filter Search filter
* @param int $result_type Type of the result (see RESULT_* constants)
*
* @return array|int Search result as count or array of uids/objects
*/
protected function searchEntries($folderid, $filter = array(), $result_type = self::RESULT_UID)
{
if ($folderid == $this->defaultRootFolder) {
$folders = $this->listFolders();
if (!is_array($folders)) {
throw new Syncroton_Exception_Status(Syncroton_Exception_Status::SERVER_ERROR);
}
$folders = array_keys($folders);
}
else {
$folders = array($folderid);
}
// there's a PHP Warning from kolab_storage if $filter isn't an array
if (empty($filter)) {
$filter = array();
}
else {
$changed_objects = $this->getChangesByRelations($folderid, $filter);
}
$result = $result_type == self::RESULT_COUNT ? 0 : array();
$found = 0;
foreach ($folders as $folder_id) {
$foldername = $this->backend->folder_id2name($folder_id, $this->device->deviceid);
$folder = $this->getFolderObject($foldername);
if (!$folder || !$folder->valid) {
throw new Syncroton_Exception_Status(Syncroton_Exception_Status::SERVER_ERROR);
}
$found++;
$error = false;
switch ($result_type) {
case self::RESULT_COUNT:
$count = $folder->count($filter);
if ($count === null || $count === false) {
$error = true;
}
else {
$result += (int) $count;
}
break;
case self::RESULT_UID:
$uids = $folder->get_uids($filter);
if (!is_array($uids)) {
$error = true;
}
else if (!empty($uids)) {
$result = array_merge($result, $this->applyServerId($uids, $folder));
}
break;
}
if ($error) {
throw new Syncroton_Exception_Status(Syncroton_Exception_Status::SERVER_ERROR);
}
// handle tag modifications
if (!empty($changed_objects)) {
// build new filter
// search objects mathing current filter,
// relations may contain members of many types, we need to
// search them by UID in all requested folders to get
// only these with requested type (and that really exist
// in specified folders)
$tag_filter = array(array('uid', '=', $changed_objects));
foreach ($filter as $f) {
if ($f[0] != 'changed') {
$tag_filter[] = $f;
}
}
switch ($result_type) {
case self::RESULT_COUNT:
// Note: this way we're potentally counting the same objects twice
// I'm not sure if this is a problem, we most likely do not
// need a precise result here
$count = $folder->count($tag_filter);
if ($count !== null && $count !== false) {
$result += (int) $count;
}
break;
case self::RESULT_UID:
$uids = $folder->get_uids($tag_filter);
if (is_array($uids) && !empty($uids)) {
$result = array_unique(array_merge($result, $this->applyServerId($uids, $folder)));
}
break;
}
}
}
if (!$found) {
throw new Syncroton_Exception_Status(Syncroton_Exception_Status::SERVER_ERROR);
}
return $result;
}
/**
* Detect changes of relation (tag) objects data and assigned objects
* Returns relation member identifiers
*/
protected function getChangesByRelations($folderid, $filter)
{
if (!$this->tag_categories) {
return;
}
// get period filter, create new objects filter
foreach ($filter as $f) {
if ($f[0] == 'changed' && $f[1] == '>') {
$since = $f[2];
}
}
// this is not search for changes, do nothing
if (empty($since)) {
return;
}
// get relations state from the last sync
$last_state = (array) $this->backend->relations_state_get($this->device->id, $folderid, $since);
// get current relations state
$config = kolab_storage_config::get_instance();
$default = true;
$filter = array(
array('type', '=', 'relation'),
array('category', '=', 'tag')
);
$relations = $config->get_objects($filter, $default, 100);
$result = array();
$changed = false;
// compare states, get members of changed relations
foreach ($relations as $relation) {
$rel_id = $relation['uid'];
if ($relation['changed']) {
$relation['changed']->setTimezone(new DateTimeZone('UTC'));
}
// last state unknown...
if (empty($last_state[$rel_id])) {
// ...get all members
if (!empty($relation['members'])) {
$changed = true;
$result = array_merge($result, $relation['members']);
}
}
// last state known, changed tag name...
else if ($last_state[$rel_id]['name'] != $relation['name']) {
// ...get all (old and new) members
$members_old = explode("\n", $last_state[$rel_id]['members']);
$changed = true;
$members = array_unique(array_merge($relation['members'], $members_old));
$result = array_merge($result, $members);
}
// last state known, any other change change...
else if ($last_state[$rel_id]['changed'] < $relation['changed']->format('U')) {
// ...find new and removed members
$members_old = explode("\n", $last_state[$rel_id]['members']);
$new = array_diff($relation['members'], $members_old);
$removed = array_diff($members_old, $relation['members']);
if (!empty($new) || !empty($removed)) {
$changed = true;
$result = array_merge($result, $new, $removed);
}
}
unset($last_state[$rel_id]);
}
// get members of deleted relations
if (!empty($last_state)) {
$changed = true;
foreach ($last_state as $relation) {
$members = explode("\n", $relation['members']);
$result = array_merge($result, $members);
}
}
// save current state
if ($changed) {
$data = array();
foreach ($relations as $relation) {
$data[$relation['uid']] = array(
'name' => $relation['name'],
'changed' => $relation['changed']->format('U'),
'members' => implode("\n", (array)$relation['members']),
);
}
$now = new DateTime('now', new DateTimeZone('UTC'));
$this->backend->relations_state_set($this->device->id, $folderid, $now, $data);
}
// in mail mode return only message URIs
if ($this->modelName == 'mail') {
// lambda function to skip email members
$filter_func = function($value) {
return strpos($value, 'imap://') === 0;
};
$result = array_filter(array_unique($result), $filter_func);
}
// otherwise return only object UIDs
else {
// lambda function to skip email members
$filter_func = function($value) {
return strpos($value, 'urn:uuid:') === 0;
};
// lambda function to parse member URI
$member_func = function($value) {
if (strpos($value, 'urn:uuid:') === 0) {
$value = substr($value, 9);
}
return $value;
};
$result = array_map($member_func, array_filter(array_unique($result), $filter_func));
}
return $result;
}
/**
* Returns filter query array according to specified ActiveSync FilterType
*
* @param int $filter_type Filter type
*
* @param array Filter query
*/
protected function filter($filter_type = 0)
{
// overwrite by child class according to specified type
return array();
}
/**
* get all entries changed between two dates
*
* @param string $folderId
* @param DateTime $start
* @param DateTime $end
* @param int $filterType
*
* @return array
*/
public function getChangedEntries($folderId, DateTime $start, DateTime $end = null, $filter_type = null)
{
$filter = $this->filter($filter_type);
$filter[] = array('changed', '>', $start);
if ($end) {
$filter[] = array('changed', '<=', $end);
}
return $this->searchEntries($folderId, $filter, self::RESULT_UID);
}
/**
* Get count of entries changed between two dates
*
* @param string $folderId
* @param DateTime $start
* @param DateTime $end
* @param int $filterType
*
* @return int
*/
public function getChangedEntriesCount($folderId, DateTime $start, DateTime $end = null, $filter_type = null)
{
$filter = $this->filter($filter_type);
$filter[] = array('changed', '>', $start);
if ($end) {
$filter[] = array('changed', '<=', $end);
}
return $this->searchEntries($folderId, $filter, self::RESULT_COUNT);
}
/**
* get id's of all entries available on the server
*
* @param string $folderId
* @param int $filterType
*
* @return array
*/
public function getServerEntries($folder_id, $filter_type)
{
$filter = $this->filter($filter_type);
$result = $this->searchEntries($folder_id, $filter, self::RESULT_UID);
return $result;
}
/**
* get count of all entries available on the server
*
* @param string $folderId
* @param int $filterType
*
* @return int
*/
public function getServerEntriesCount($folder_id, $filter_type)
{
$filter = $this->filter($filter_type);
$result = $this->searchEntries($folder_id, $filter, self::RESULT_COUNT);
return $result;
}
/**
* Returns number of changed objects in the backend folder
*
* @param Syncroton_Backend_IContent $contentBackend
* @param Syncroton_Model_IFolder $folder
* @param Syncroton_Model_ISyncState $syncState
*
* @return int
*/
public function getCountOfChanges(Syncroton_Backend_IContent $contentBackend, Syncroton_Model_IFolder $folder, Syncroton_Model_ISyncState $syncState)
{
$allClientEntries = $contentBackend->getFolderState($this->device, $folder);
$allServerEntries = $this->getServerEntries($folder->serverId, $folder->lastfiltertype);
$changedEntries = $this->getChangedEntriesCount($folder->serverId, $syncState->lastsync, null, $folder->lastfiltertype);
$addedEntries = array_diff($allServerEntries, $allClientEntries);
$deletedEntries = array_diff($allClientEntries, $allServerEntries);
return count($addedEntries) + count($deletedEntries) + $changedEntries;
}
/**
* Returns true if any data got modified in the backend folder
*
* @param Syncroton_Backend_IContent $contentBackend
* @param Syncroton_Model_IFolder $folder
* @param Syncroton_Model_ISyncState $syncState
*
* @return bool
*/
public function hasChanges(Syncroton_Backend_IContent $contentBackend, Syncroton_Model_IFolder $folder, Syncroton_Model_ISyncState $syncState)
{
try {
if ($this->getChangedEntriesCount($folder->serverId, $syncState->lastsync, null, $folder->lastfiltertype)) {
return true;
}
$allClientEntries = $contentBackend->getFolderState($this->device, $folder);
// @TODO: Consider looping over all folders here, not in getServerEntries() and
// getChangedEntriesCount(). This way we could break the loop and not check all folders
// or at least skip redundant cache sync of the same folder
$allServerEntries = $this->getServerEntries($folder->serverId, $folder->lastfiltertype);
$addedEntries = array_diff($allServerEntries, $allClientEntries);
$deletedEntries = array_diff($allClientEntries, $allServerEntries);
return count($addedEntries) > 0 || count($deletedEntries) > 0;
}
catch (Exception $e) {
// return "no changes" if something failed
return false;
}
}
/**
* Fetches the entry from the backend
*/
protected function getObject($folderid, $entryid, &$folder = null)
{
$folders = $this->extractFolders($folderid);
foreach ($folders as $folderid) {
$foldername = $this->backend->folder_id2name($folderid, $this->device->deviceid);
$folder = $this->getFolderObject($foldername);
if ($folder && $folder->valid) {
$crc = null;
$uid = $entryid;
// See self::serverId() for full explanation
// Use (slower) UID prefix matching...
if (preg_match('/^CRC([0-9A-Fa-f]{8})(.+)$/', $uid, $matches)) {
$crc = $matches[1];
$uid = $matches[2];
if (strlen($entryid) >= 64) {
foreach ($folder->select(array(array('uid', '~*', $uid))) as $object) {
if (($object['uid'] == $uid || strpos($object['uid'], $uid) === 0)
&& $crc == $this->objectCRC($object['uid'], $folder)
) {
$object['_folderid'] = $folderid;
return $object;
}
}
continue;
}
}
// Or (faster) strict UID matching...
if (($object = $folder->get_object($uid))
&& ($crc === null || $crc == $this->objectCRC($object['uid'], $folder))
) {
$object['_folderid'] = $folderid;
return $object;
}
}
}
}
/**
* Saves the entry on the backend
*/
protected function createObject($folderid, $data)
{
if ($folderid == $this->defaultRootFolder) {
$default = $this->getDefaultFolder();
if (!is_array($default)) {
return null;
}
$folderid = isset($default['realid']) ? $default['realid'] : $default['serverId'];
}
// convert categories into tags, save them after creating an object
if ($this->tag_categories) {
$tags = $data['categories'];
unset($data['categories']);
}
$foldername = $this->backend->folder_id2name($folderid, $this->device->deviceid);
$folder = $this->getFolderObject($foldername);
+ // Set User-Agent for saved objects
+ $app = kolab_sync::get_instance();
+ $app->config->set('useragent', $app->app_name . ' ' . kolab_sync::VERSION);
+
if ($folder && $folder->valid && $folder->save($data)) {
if (!empty($tags)) {
$this->setKolabTags($data['uid'], $tags);
}
$data['_serverId'] = $this->serverId($data['uid'], $folder);
return $data;
}
}
/**
* Updates the entry on the backend
*/
protected function updateObject($folderid, $entryid, $data)
{
$object = $this->getObject($folderid, $entryid);
if ($object) {
$folder = $this->getFolderObject($object['_mailbox']);
// convert categories into tags, save them after updating an object
if ($this->tag_categories && array_key_exists('categories', $data)) {
$tags = (array) $data['categories'];
unset($data['categories']);
}
+ // Set User-Agent for saved objects
+ $app = kolab_sync::get_instance();
+ $app->config->set('useragent', $app->app_name . ' ' . kolab_sync::VERSION);
+
if ($folder && $folder->valid && $folder->save($data)) {
if (isset($tags)) {
$this->setKolabTags($data['uid'], $tags);
}
$data['_serverId'] = $this->serverId($object['uid'], $folder);
return $data;
}
}
}
/**
* Removes the entry from the backend
*/
protected function deleteObject($folderid, $entryid)
{
$object = $this->getObject($folderid, $entryid);
if ($object) {
$folder = $this->getFolderObject($object['_mailbox']);
if ($folder && $folder->valid && $folder->delete($object['uid'])) {
if ($this->tag_categories) {
$this->setKolabTags($object['uid'], null);
}
return true;
}
return false;
}
// object doesn't exist, confirm deletion
return true;
}
/**
* Returns internal folder IDs
*
* @param string $folderid Folder identifier
*
* @return array List of folder identifiers
*/
protected function extractFolders($folderid)
{
if ($folderid instanceof Syncroton_Model_IFolder) {
$folderid = $folderid->serverId;
}
if ($folderid == $this->defaultRootFolder) {
$folders = $this->listFolders();
if (!is_array($folders)) {
return null;
}
$folders = array_keys($folders);
}
else {
$folders = array($folderid);
}
return $folders;
}
/**
* List of all IMAP folders (or subtree)
*
* @param string $parentid Parent folder identifier
*
* @return array List of folder identifiers
*/
protected function listFolders($parentid = null)
{
if (empty($this->imap_folders)) {
$this->imap_folders = $this->backend->folders_list(
$this->device->deviceid, $this->modelName, $this->isMultiFolder());
}
if ($parentid === null) {
return $this->imap_folders;
}
$folders = array();
$parents = array($parentid);
foreach ($this->imap_folders as $folder_id => $folder) {
if ($folder['parentId'] && in_array($folder['parentId'], $parents)) {
$folders[$folder_id] = $folder;
$parents[] = $folder_id;
}
}
return $folders;
}
/**
* Returns Folder object (uses internal cache)
*
* @param string $name Folder name (UTF7-IMAP)
*
* @return kolab_storage_folder Folder object
*/
protected function getFolderObject($name)
{
if ($name === null || $name === '') {
return null;
}
if (!isset($this->folders[$name])) {
$this->folders[$name] = kolab_storage::get_folder($name, $this->modelName);
}
return $this->folders[$name];
}
/**
* Returns ActiveSync settings of specified folder
*
* @param string $name Folder name (UTF7-IMAP)
*
* @return array Folder settings
*/
protected function getFolderConfig($name)
{
$metadata = $this->backend->folder_meta();
if (!is_array($metadata)) {
return array();
}
$deviceid = $this->device->deviceid;
$config = $metadata[$name]['FOLDER'][$deviceid];
return array(
'ALARMS' => $config['S'] == 2,
);
}
/**
* Returns real folder name for specified folder ID
*/
protected function getFolderName($folderid)
{
if ($folderid == $this->defaultRootFolder) {
$default = $this->getDefaultFolder();
if (!is_array($default)) {
return null;
}
$folderid = isset($default['realid']) ? $default['realid'] : $default['serverId'];
}
return $this->backend->folder_id2name($folderid, $this->device->deviceid);
}
/**
* Returns folder ID from Kolab folder object
*/
protected function getFolderId($folder)
{
if (!$this->isMultiFolder()) {
return $this->defaultRootFolder;
}
return $this->backend->folder_id($folder->get_name(), $folder->get_type());
}
/**
* Convert contact from xml to kolab format
*
* @param Syncroton_Model_IEntry $data Contact data
* @param string $folderId Folder identifier
* @param array $entry Old Contact data for merge
*
* @return array
*/
abstract function toKolab(Syncroton_Model_IEntry $data, $folderId, $entry = null);
/**
* Extracts data from kolab data array
*/
protected function getKolabDataItem($data, $name)
{
$name_items = explode('.', $name);
$count = count($name_items);
// multi-level array (e.g. address, phone)
if ($count == 3) {
$name = $name_items[0];
$type = $name_items[1];
$key_name = $name_items[2];
if (!empty($data[$name]) && is_array($data[$name])) {
foreach ($data[$name] as $element) {
if ($element['type'] == $type) {
return $element[$key_name];
}
}
}
return null;
}
// custom properties
if ($count == 2 && $name_items[0] == 'x-custom') {
$value = null;
foreach ((array) $data['x-custom'] as $val) {
if (is_array($val) && $val[0] == $name_items[1]) {
$value = $val[1];
break;
}
}
return $value;
}
$name_items = explode(':', $name);
$name = $name_items[0];
if (empty($data[$name])) {
return null;
}
// simple array (e.g. email)
if (count($name_items) == 2) {
return $data[$name][$name_items[1]];
}
return $data[$name];
}
/**
* Saves data in kolab data array
*/
protected function setKolabDataItem(&$data, $name, $value)
{
if (empty($value)) {
return $this->unsetKolabDataItem($data, $name);
}
$name_items = explode('.', $name);
$count = count($name_items);
// multi-level array (e.g. address, phone)
if ($count == 3) {
$name = $name_items[0];
$type = $name_items[1];
$key_name = $name_items[2];
if (!isset($data[$name])) {
$data[$name] = array();
}
foreach ($data[$name] as $idx => $element) {
if ($element['type'] == $type) {
$found = $idx;
break;
}
}
if (!isset($found)) {
$data[$name] = array_values($data[$name]);
$found = count($data[$name]);
$data[$name][$found] = array('type' => $type);
}
$data[$name][$found][$key_name] = $value;
return;
}
// custom properties
if ($count == 2 && $name_items[0] == 'x-custom') {
foreach ((array) $data['x-custom'] as $idx => $val) {
if (is_array($val) && $val[0] == $name_items[1]) {
$data['x-custom'][$idx][1] = $value;
return;
}
}
$data['x-custom'][] = array($name_items[1], $value);
return;
}
$name_items = explode(':', $name);
$name = $name_items[0];
// simple array (e.g. email)
if (count($name_items) == 2) {
$data[$name][$name_items[1]] = $value;
return;
}
$data[$name] = $value;
}
/**
* Unsets data item in kolab data array
*/
protected function unsetKolabDataItem(&$data, $name)
{
$name_items = explode('.', $name);
$count = count($name_items);
// multi-level array (e.g. address, phone)
if ($count == 3) {
$name = $name_items[0];
$type = $name_items[1];
$key_name = $name_items[2];
if (!isset($data[$name])) {
return;
}
foreach ($data[$name] as $idx => $element) {
if ($element['type'] == $type) {
$found = $idx;
break;
}
}
if (!isset($found)) {
return;
}
unset($data[$name][$found][$key_name]);
// if there's only one element and it's 'type', remove it
if (count($data[$name][$found]) == 1 && isset($data[$name][$found]['type'])) {
unset($data[$name][$found]['type']);
}
if (empty($data[$name][$found])) {
unset($data[$name][$found]);
}
if (empty($data[$name])) {
unset($data[$name]);
}
return;
}
// custom properties
if ($count == 2 && $name_items[0] == 'x-custom') {
foreach ((array) $data['x-custom'] as $idx => $val) {
if (is_array($val) && $val[0] == $name_items[1]) {
unset($data['x-custom'][$idx]);
}
}
}
$name_items = explode(':', $name);
$name = $name_items[0];
// simple array (e.g. email)
if (count($name_items) == 2) {
unset($data[$name][$name_items[1]]);
if (empty($data[$name])) {
unset($data[$name]);
}
return;
}
unset($data[$name]);
}
/**
* Setter for Body attribute according to client version
*
* @param string $value Body
* @param array $param Body parameters
*
* @reurn Syncroton_Model_EmailBody Body element
*/
protected function setBody($value, $params = array())
{
if (empty($value) && empty($params)) {
return;
}
// Old protocol version doesn't support AirSyncBase:Body, it's eg. WindowsCE
if ($this->asversion < 12) {
return;
}
if (!empty($value)) {
// cast to string to workaround issue described in Bug #1635
$params['data'] = (string) $value;
}
if (!isset($params['type'])) {
$params['type'] = Syncroton_Model_EmailBody::TYPE_PLAINTEXT;
}
return new Syncroton_Model_EmailBody($params);
}
/**
* Getter for Body attribute value according to client version
*
* @param mixed $body Body element
* @param int $type Result data type (to which the body will be converted, if specified).
* One or array of Syncroton_Model_EmailBody constants.
*
* @return string Body value
*/
protected function getBody($body, $type = null)
{
if ($body && $body->data) {
$data = $body->data;
}
if (!$data || empty($type)) {
return;
}
$type = (array) $type;
// Convert to specified type
if (!in_array($body->type, $type)) {
$converter = new kolab_sync_body_converter($data, $body->type);
$data = $converter->convert($type[0]);
}
return $data;
}
/**
* Converts text (plain or html) into ActiveSync Body element.
* Takes bodyPreferences into account and detects if the text is plain or html.
*/
protected function body_from_kolab($body, $collection)
{
if (empty($body)) {
return;
}
$opts = $collection->options;
$prefs = $opts['bodyPreferences'];
$html_type = Syncroton_Command_Sync::BODY_TYPE_HTML;
$type = Syncroton_Command_Sync::BODY_TYPE_PLAIN_TEXT;
$params = array();
// HTML? check for opening and closing <html> or <body> tags
$is_html = preg_match('/<(html|body)(\s+[a-z]|>)/', $body, $m) && strpos($body, '</'.$m[1].'>') > 0;
// here we assume that all devices support plain text
if ($is_html) {
// device supports HTML...
if (!empty($prefs[$html_type])) {
$type = $html_type;
}
// ...else convert to plain text
else {
$txt = new rcube_html2text($body, false, true);
$body = $txt->get_text();
}
}
// strip out any non utf-8 characters
$body = rcube_charset::clean($body);
$real_length = $body_length = strlen($body);
// truncate the body if needed
if (($truncateAt = $prefs[$type]['truncationSize']) && $body_length > $truncateAt) {
$body = mb_strcut($body, 0, $truncateAt);
$body_length = strlen($body);
$params['truncated'] = 1;
$params['estimatedDataSize'] = $real_length;
}
$params['type'] = $type;
return $this->setBody($body, $params);
}
/**
* Converts PHP DateTime, date (YYYY-MM-DD) or unixtimestamp into PHP DateTime in UTC
*
* @param DateTime|int|string $date Unix timestamp, date (YYYY-MM-DD) or PHP DateTime object
*
* @return DateTime Datetime object
*/
protected static function date_from_kolab($date)
{
if (!empty($date)) {
if (is_numeric($date)) {
$date = new DateTime('@' . $date);
}
else if (is_string($date)) {
$date = new DateTime($date, new DateTimeZone('UTC'));
}
else if ($date instanceof DateTime) {
$date = clone $date;
$tz = $date->getTimezone();
$tz_name = $tz->getName();
// convert to UTC if needed
if ($tz_name != 'UTC') {
$utc = new DateTimeZone('UTC');
// safe dateonly object conversion to UTC
// note: _dateonly flag is set by libkolab e.g. for birthdays
if ($date->_dateonly) {
// avoid time change
$date = new DateTime($date->format('Y-m-d'), $utc);
// set time to noon to avoid timezone troubles
$date->setTime(12, 0, 0);
}
else {
$date->setTimezone($utc);
}
}
}
else {
return null; // invalid input
}
return $date;
}
}
/**
* Convert Kolab event/task recurrence into ActiveSync
*/
protected function recurrence_from_kolab($collection, $data, &$result, $type = 'Event')
{
if (empty($data['recurrence']) || !empty($data['recurrence_date'])) {
return;
}
$recurrence = array();
$r = $data['recurrence'];
// required fields
switch($r['FREQ']) {
case 'DAILY':
$recurrence['type'] = self::RECUR_TYPE_DAILY;
break;
case 'WEEKLY':
$recurrence['type'] = self::RECUR_TYPE_WEEKLY;
$recurrence['dayOfWeek'] = $this->day2bitmask($r['BYDAY']);
break;
case 'MONTHLY':
if (!empty($r['BYMONTHDAY'])) {
// @TODO: ActiveSync doesn't support multi-valued month days,
// should we replicate the recurrence element for each day of month?
$month_day = array_shift(explode(',', $r['BYMONTHDAY']));
$recurrence['type'] = self::RECUR_TYPE_MONTHLY;
$recurrence['dayOfMonth'] = $month_day;
}
else {
$week = (int) substr($r['BYDAY'], 0, -2);
$week = ($week == -1) ? 5 : $week;
$day = substr($r['BYDAY'], -2);
$recurrence['type'] = self::RECUR_TYPE_MONTHLY_DAYN;
$recurrence['weekOfMonth'] = $week;
$recurrence['dayOfWeek'] = $this->day2bitmask($day);
}
break;
case 'YEARLY':
// @TODO: ActiveSync doesn't support multi-valued months,
// should we replicate the recurrence element for each month?
$month = array_shift(explode(',', $r['BYMONTH']));
if (!empty($r['BYDAY'])) {
$week = (int) substr($r['BYDAY'], 0, -2);
$week = ($week == -1) ? 5 : $week;
$day = substr($r['BYDAY'], -2);
$recurrence['type'] = self::RECUR_TYPE_YEARLY_DAYN;
$recurrence['weekOfMonth'] = $week;
$recurrence['dayOfWeek'] = $this->day2bitmask($day);
$recurrence['monthOfYear'] = $month;
}
else if (!empty($r['BYMONTHDAY'])) {
// @TODO: ActiveSync doesn't support multi-valued month days,
// should we replicate the recurrence element for each day of month?
$month_day = array_shift(explode(',', $r['BYMONTHDAY']));
$recurrence['type'] = self::RECUR_TYPE_YEARLY;
$recurrence['dayOfMonth'] = $month_day;
$recurrence['monthOfYear'] = $month;
}
else {
$recurrence['type'] = self::RECUR_TYPE_YEARLY;
$recurrence['monthOfYear'] = $month;
}
break;
default:
return;
}
// Skip all empty values (T2519)
if ($recurrence['type'] != self::RECUR_TYPE_DAILY) {
$recurrence = array_filter($recurrence);
}
// required field
$recurrence['interval'] = $r['INTERVAL'] ?: 1;
if (!empty($r['UNTIL'])) {
$recurrence['until'] = self::date_from_kolab($r['UNTIL']);
}
else if (!empty($r['COUNT'])) {
$recurrence['occurrences'] = $r['COUNT'];
}
$class = 'Syncroton_Model_' . $type . 'Recurrence';
$result['recurrence'] = new $class($recurrence);
// Tasks do not support exceptions
if ($type == 'Event') {
$result['exceptions'] = $this->exceptions_from_kolab($collection, $data);
}
}
/**
* Convert ActiveSync event/task recurrence into Kolab
*/
protected function recurrence_to_kolab($data, $folderid, $timezone = null)
{
if (!($data->recurrence instanceof Syncroton_Model_EventRecurrence) || !isset($data->recurrence->type)) {
return null;
}
$recurrence = $data->recurrence;
$type = $recurrence->type;
switch ($type) {
case self::RECUR_TYPE_DAILY:
break;
case self::RECUR_TYPE_WEEKLY:
$rrule['BYDAY'] = $this->bitmask2day($recurrence->dayOfWeek);
break;
case self::RECUR_TYPE_MONTHLY:
$rrule['BYMONTHDAY'] = $recurrence->dayOfMonth;
break;
case self::RECUR_TYPE_MONTHLY_DAYN:
$week = $recurrence->weekOfMonth;
$day = $recurrence->dayOfWeek;
$byDay = $week == 5 ? -1 : $week;
$byDay .= $this->bitmask2day($day);
$rrule['BYDAY'] = $byDay;
break;
case self::RECUR_TYPE_YEARLY:
$rrule['BYMONTH'] = $recurrence->monthOfYear;
$rrule['BYMONTHDAY'] = $recurrence->dayOfMonth;
break;
case self::RECUR_TYPE_YEARLY_DAYN:
$rrule['BYMONTH'] = $recurrence->monthOfYear;
$week = $recurrence->weekOfMonth;
$day = $recurrence->dayOfWeek;
$byDay = $week == 5 ? -1 : $week;
$byDay .= $this->bitmask2day($day);
$rrule['BYDAY'] = $byDay;
break;
}
$rrule['FREQ'] = $this->recurTypeMap[$type];
$rrule['INTERVAL'] = isset($recurrence->interval) ? $recurrence->interval : 1;
if (isset($recurrence->until)) {
if ($timezone) {
$recurrence->until->setTimezone($timezone);
}
$rrule['UNTIL'] = $recurrence->until;
}
else if (!empty($recurrence->occurrences)) {
$rrule['COUNT'] = $recurrence->occurrences;
}
// recurrence exceptions (not supported by Tasks)
if ($data instanceof Syncroton_Model_Event) {
$this->exceptions_to_kolab($data, $rrule, $folderid, $timezone);
}
return $rrule;
}
/**
* Convert Kolab event recurrence exceptions into ActiveSync
*/
protected function exceptions_from_kolab($collection, $data)
{
if (empty($data['recurrence']['EXCEPTIONS']) && empty($data['recurrence']['EXDATE'])) {
return null;
}
$ex_list = array();
// exceptions (modified occurences)
foreach ((array)$data['recurrence']['EXCEPTIONS'] as $exception) {
$exception['_mailbox'] = $data['_mailbox'];
$ex = $this->getEntry($collection, $exception, true);
$date = clone ($exception['recurrence_date'] ?: $ex['startTime']);
$ex['exceptionStartTime'] = self::set_exception_time($date, $data['_start']);
// remove fields not supported by Syncroton_Model_EventException
unset($ex['uID']);
// @TODO: 'thisandfuture=true' is not supported in Activesync
// we'd need to slit the event into two separate events
$ex_list[] = new Syncroton_Model_EventException($ex);
}
// exdate (deleted occurences)
foreach ((array)$data['recurrence']['EXDATE'] as $exception) {
if (!($exception instanceof DateTime)) {
continue;
}
$ex = array(
'deleted' => 1,
'exceptionStartTime' => self::set_exception_time($exception, $data['_start']),
);
$ex_list[] = new Syncroton_Model_EventException($ex);
}
return $ex_list;
}
/**
* Convert ActiveSync event recurrence exceptions into Kolab
*/
protected function exceptions_to_kolab($data, &$rrule, $folderid, $timezone = null)
{
$rrule['EXDATE'] = array();
$rrule['EXCEPTIONS'] = array();
// handle exceptions from recurrence
if (!empty($data->exceptions)) {
foreach ($data->exceptions as $exception) {
if ($exception->deleted) {
$date = clone $exception->exceptionStartTime;
if ($timezone) {
$date->setTimezone($timezone);
}
$date->setTime(0, 0, 0);
$rrule['EXDATE'][] = $date;
}
else {
$ex = $this->toKolab($exception, $folderid, null, $timezone);
if ($data->allDayEvent) {
$ex['allday'] = 1;
}
$rrule['EXCEPTIONS'][] = $ex;
}
}
}
if (empty($rrule['EXDATE'])) {
unset($rrule['EXDATE']);
}
if (empty($rrule['EXCEPTIONS'])) {
unset($rrule['EXCEPTIONS']);
}
}
/**
* Sets ExceptionStartTime according to occurrence date and event start time
*/
protected static function set_exception_time($exception_date, $event_start)
{
if ($exception_date && $event_start) {
$hour = $event_start->format('H');
$minute = $event_start->format('i');
$second = $event_start->format('s');
$exception_date->setTime($hour, $minute, $second);
$exception_date->_dateonly = false;
return self::date_from_kolab($exception_date);
}
}
/**
* Returns list of tag names assigned to kolab object
*/
protected function getKolabTags($uid, $categories = null)
{
$config = kolab_storage_config::get_instance();
$tags = $config->get_tags($uid);
$tags = array_filter(array_map(function($v) { return $v['name']; }, $tags));
// merge result with old categories
if (!empty($categories)) {
$tags = array_unique(array_merge($tags, (array) $categories));
}
return $tags;
}
/**
* Set tags to kolab object
*/
protected function setKolabTags($uid, $tags)
{
$config = kolab_storage_config::get_instance();
$config->save_tags($uid, $tags);
}
/**
* Converts string of days (TU,TH) to bitmask used by ActiveSync
*
* @param string $days
*
* @return int
*/
protected function day2bitmask($days)
{
$days = explode(',', $days);
$result = 0;
foreach ($days as $day) {
$result = $result + $this->recurDayMap[$day];
}
return $result;
}
/**
* Convert bitmask used by ActiveSync to string of days (TU,TH)
*
* @param int $days
*
* @return string
*/
protected function bitmask2day($days)
{
$days_arr = array();
for ($bitmask = 1; $bitmask <= self::RECUR_DOW_SATURDAY; $bitmask = $bitmask << 1) {
$dayMatch = $days & $bitmask;
if ($dayMatch === $bitmask) {
$days_arr[] = array_search($bitmask, $this->recurDayMap);
}
}
$result = implode(',', $days_arr);
return $result;
}
/**
* Check if current device type string matches any of options
*/
protected function deviceTypeFilter($options)
{
foreach ($options as $option) {
if ($option[0] == '/') {
if (preg_match($option, $this->device->devicetype)) {
return true;
}
}
else if (stripos($this->device->devicetype, $option) !== false) {
return true;
}
}
return false;
}
/**
* Returns all email addresses of the current user
*/
protected function user_emails()
{
$user_emails = kolab_sync::get_instance()->user->list_emails();
$user_emails = array_map(function($v) { return $v['email']; }, $user_emails);
return $user_emails;
}
/**
* Generate CRC-based ServerId from object UID
*/
protected function serverId($uid, $folder)
{
if ($this->modelName == 'mail') {
return $uid;
}
// When ActiveSync communicates with the client, it refers to objects with a ServerId
// We can't use object UID for ServerId because:
// - ServerId is limited to 64 chars,
// - there can be multiple calendars with a copy of the same event.
//
// The solution is to; Take the original UID, and regardless of its length, execute the following:
// - Hash the UID concatenated with the Folder ID using CRC32b,
// - Prefix the UID with 'CRC' and the hash string,
// - Tryncate the result to 64 characters.
//
// Searching for the server-side copy of the object now follows the logic;
// - If the ServerId is prefixed with 'CRC', strip off the first 11 characters
// and we search for the UID using the remainder;
// - if the UID is shorter than 53 characters, it'll be the complete UID,
// - if the UID is longer than 53 characters, it'll be the truncated UID,
// and we search for a wildcard match of <uid>*
// When multiple copies of the same event are found, the same CRC32b hash can be used
// on the events metadata (i.e. the copy's UID and Folder ID), and compared with the CRC from the ServerId.
// ServerId is max. 64 characters, below we generate a string of max. 64 chars
// Note: crc32b is always 8 characters
return 'CRC' . $this->objectCRC($uid, $folder) . substr($uid, 0, 53);
}
/**
* Calculate checksum on object UID and folder UID
*/
protected function objectCRC($uid, $folder)
{
if (!is_object($folder)) {
$folder = $this->getFolderObject($folder);
}
$folder_uid = $folder->get_uid();
return strtoupper(hash('crc32b', $folder_uid . $uid)); // always 8 chars
}
/**
* Apply serverId() on a set of uids
*/
protected function applyServerId($uids, $folder)
{
if (!empty($uids) && $this->modelName != 'mail') {
$self = $this;
$func = function($uid) use ($self, $folder) { return $self->serverId($uid, $folder); };
$uids = array_map($func, $uids);
}
return $uids;
}
}

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