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SyncState.php
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SyncState.php
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<?php
/**
* Syncroton
*
* @package Syncroton
* @subpackage Backend
* @license http://www.tine20.org/licenses/lgpl.html LGPL Version 3
* @author Lars Kneschke <l.kneschke@metaways.de>
* @copyright Copyright (c) 2009-2012 Metaways Infosystems GmbH (http://www.metaways.de)
*
*/
/**
* sql backend class for the folder state
*
* @package Syncroton
* @subpackage Backend
*/
class Syncroton_Backend_SyncState implements Syncroton_Backend_ISyncState
{
/**
* the database adapter
*
* @var Zend_Db_Adapter_Abstract
*/
protected $_db;
protected $_tablePrefix;
public function __construct(Zend_Db_Adapter_Abstract $_db, $_tablePrefix = 'Syncroton_')
{
$this->_db = $_db;
$this->_tablePrefix = $_tablePrefix;
}
/**
* create new sync state
*
* @param Syncroton_Model_ISyncState $_syncState
* @return Syncroton_Model_SyncState
*/
public function create(Syncroton_Model_ISyncState $_syncState, $_keepPreviousSyncState = true)
{
$id = sha1(mt_rand(). microtime());
$deviceId = $_syncState->device_id instanceof Syncroton_Model_IDevice ? $_syncState->device_id->id : $_syncState->device_id;
$this->_db->insert($this->_tablePrefix . 'synckey', array(
'id' => $id,
'device_id' => $deviceId,
'type' => $_syncState->type instanceof Syncroton_Model_IFolder ? $_syncState->type->id : $_syncState->type,
'counter' => $_syncState->counter,
'lastsync' => $_syncState->lastsync->format('Y-m-d H:i:s'),
'pendingdata' => isset($_syncState->pendingdata) && is_array($_syncState->pendingdata) ? Zend_Json::encode($_syncState->pendingdata) : null
));
$state = $this->get($id);
if ($_keepPreviousSyncState !== true) {
// remove all other synckeys
$this->_deleteOtherStates($state);
}
return $state;
}
protected function _deleteOtherStates(Syncroton_Model_ISyncState $_state)
{
// remove all other synckeys
$where = array(
'device_id = ?' => $_state->device_id,
'type = ?' => $_state->type,
'counter != ?' => $_state->counter
);
$this->_db->delete($this->_tablePrefix . 'synckey', $where);
return true;
}
/**
* @param string $_id
* @throws Syncroton_Exception_NotFound
* @return Syncroton_Model_SyncState
*/
public function get($_id)
{
$select = $this->_db->select()
->from($this->_tablePrefix . 'synckey')
->where('id = ?', $_id);
$stmt = $this->_db->query($select);
$state = $stmt->fetchObject('Syncroton_Model_SyncState');
$stmt = null; # see https://bugs.php.net/bug.php?id=44081
if (! $state instanceof Syncroton_Model_ISyncState) {
throw new Syncroton_Exception_NotFound('id not found');
}
$this->_convertFields($state);
return $state;
}
protected function _convertFields(Syncroton_Model_SyncState $state)
{
if (!empty($state->lastsync)) {
$state->lastsync = new DateTime($state->lastsync, new DateTimeZone('utc'));
}
if ($state->pendingdata !== NULL) {
$state->pendingdata = Zend_Json::decode($state->pendingdata);
}
}
/**
* always returns the latest syncstate
*
* @param Syncroton_Model_IDevice|string $_deviceId
* @param Syncroton_Model_IFolder|string $_folderId
* @return Syncroton_Model_SyncState
*/
public function getSyncState($_deviceId, $_folderId)
{
$deviceId = $_deviceId instanceof Syncroton_Model_IDevice ? $_deviceId->id : $_deviceId;
$folderId = $_folderId instanceof Syncroton_Model_IFolder ? $_folderId->id : $_folderId;
$select = $this->_db->select()
->from($this->_tablePrefix . 'synckey')
->where($this->_db->quoteIdentifier('device_id') . ' = ?', $deviceId)
->where($this->_db->quoteIdentifier('type') . ' = ?', $folderId)
->order('counter DESC')
->limit(1);
$stmt = $this->_db->query($select);
$state = $stmt->fetchObject('Syncroton_Model_SyncState');
$stmt = null; # see https://bugs.php.net/bug.php?id=44081
if (! $state instanceof Syncroton_Model_ISyncState) {
throw new Syncroton_Exception_NotFound('id not found');
}
$this->_convertFields($state);
return $state;
}
/**
* delete all stored synckeys for given type
*
* @param Syncroton_Model_IDevice|string $_deviceId
* @param Syncroton_Model_IFolder|string $_folderId
*/
public function resetState($_deviceId, $_folderId)
{
$deviceId = $_deviceId instanceof Syncroton_Model_IDevice ? $_deviceId->id : $_deviceId;
$folderId = $_folderId instanceof Syncroton_Model_IFolder ? $_folderId->id : $_folderId;
$where = array(
$this->_db->quoteInto($this->_db->quoteIdentifier('device_id') . ' = ?', $deviceId),
$this->_db->quoteInto($this->_db->quoteIdentifier('type') . ' = ?', $folderId)
);
$this->_db->delete($this->_tablePrefix . 'synckey', $where);
}
public function update(Syncroton_Model_ISyncState $_syncState)
{
$deviceId = $_syncState->device_id instanceof Syncroton_Model_IDevice ? $_syncState->device_id->id : $_syncState->device_id;
$this->_db->update($this->_tablePrefix . 'synckey', array(
'counter' => $_syncState->counter,
'lastsync' => $_syncState->lastsync->format('Y-m-d H:i:s'),
'pendingdata' => isset($_syncState->pendingdata) && is_array($_syncState->pendingdata) ? Zend_Json::encode($_syncState->pendingdata) : null
), array(
'id = ?' => $_syncState->id
));
return $this->get($_syncState->id);
}
/**
* get array of ids which got send to the client for a given class
*
* @param Syncroton_Model_IDevice|string $_deviceId
* @param Syncroton_Model_IFolder|string $_folderId
* @return Syncroton_Model_SyncState
*/
public function validate($_deviceId, $_folderId, $_syncKey)
{
$deviceId = $_deviceId instanceof Syncroton_Model_IDevice ? $_deviceId->id : $_deviceId;
$folderId = $_folderId instanceof Syncroton_Model_IFolder ? $_folderId->id : $_folderId;
$select = $this->_db->select()
->from($this->_tablePrefix . 'synckey')
->where($this->_db->quoteIdentifier('device_id') . ' = ?', $deviceId)
->where($this->_db->quoteIdentifier('counter') . ' = ?', $_syncKey)
->where($this->_db->quoteIdentifier('type') . ' = ?', $folderId);
$stmt = $this->_db->query($select);
$state = $stmt->fetchObject('Syncroton_Model_SyncState');
$stmt = null; # see https://bugs.php.net/bug.php?id=44081
if (! $state instanceof Syncroton_Model_ISyncState) {
return false;
}
$this->_convertFields($state);
// check if this was the latest syncKey
$select = $this->_db->select()
->from($this->_tablePrefix . 'synckey')
->where($this->_db->quoteIdentifier('device_id') . ' = ?', $deviceId)
->where($this->_db->quoteIdentifier('counter') . ' = ?', $_syncKey + 1)
->where($this->_db->quoteIdentifier('type') . ' = ?', $folderId);
$stmt = $this->_db->query($select);
$moreRecentState = $stmt->fetchObject('Syncroton_Model_SyncState');
$stmt = null; # see https://bugs.php.net/bug.php?id=44081
// found more recent synckey => the last sync repsone got not received by the client
if ($moreRecentState instanceof Syncroton_Model_ISyncState) {
// undelete entries marked as deleted in Syncroton_content table
$this->_db->update($this->_tablePrefix . 'content', array(
'is_deleted' => 0,
), array(
'device_id = ?' => $deviceId,
'folder_id = ?' => $folderId,
'creation_synckey = ?' => $state->counter,
'is_deleted = ?' => 1
));
// remove entries added during latest sync in Syncroton_content table
$this->_db->delete($this->_tablePrefix . 'content', array(
'device_id = ?' => $deviceId,
'folder_id = ?' => $folderId,
'creation_synckey > ?' => $state->counter,
));
} else {
// finaly delete all entries marked for removal in Syncroton_content table
$this->_db->delete($this->_tablePrefix . 'content', array(
'device_id = ?' => $deviceId,
'folder_id = ?' => $folderId,
'is_deleted = ?' => 1
));
}
// remove all other synckeys
$this->_deleteOtherStates($state);
return $state;
}
}

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SyncState.php (9 KB)

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