egroupware/phpgwapi/inc/horde/Horde/SyncML/Command/Alert.php

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<?php
/**
* eGroupWare - SyncML based on Horde 3
*
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* The Horde_SyncML_Alert class provides a SyncML implementation of
* the Alert command as defined in SyncML Representation Protocol,
* version 1.1 5.5.2.
*
*
* Using the PEAR Log class (which need to be installed!)
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*
* @link http://www.egroupware.org
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @subpackage horde
* @author Anthony Mills <amills@pyramid6.com>
* @author Joerg Lehrke <jlehrke@noc.de>
* @copyright (c) The Horde Project (http://www.horde.org/)
* @version $Id$
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*/
include_once 'Horde/SyncML/State_egw.php';
include_once 'Horde/SyncML/Command.php';
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class Horde_SyncML_Command_Alert extends Horde_SyncML_Command {
/**
* Name of the command.
*
* @var string
*/
var $_cmdName = 'Alert';
/**
* The alert type. Should be one of the ALERT_* constants.
*
* @var integer
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*/
var $_alert;
/**
* Source database of the Alert command.
*
* @var string
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*/
var $_sourceLocURI;
/**
* Target database of the Alert command.
*
* @var string
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*/
var $_targetLocURI;
/**
* Optional parameter for the Target database.
*
* @var string
*/
var $_targetLocURIParameters;
/**
* The current time this synchronization happens, from the <Meta><Next>
* element.
*
* @var string
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*/
var $_metaAnchorNext;
/**
* The last time when synchronization happened, from the <Meta><Last>
* element.
*
* @var integer
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*/
var $_metaAnchorLast;
/**
* The filter expression the client provided
* (e.g. the time range for calendar synchronization)
*
* @var string
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*/
var $_filterExpression = '';
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/**
* Creates a new instance of Alert.
*/
function Horde_SyncML_Command_Alert($alert = null)
{
if ($alert != null) {
$this->_alert = $alert;
}
}
function output($currentCmdID, &$output)
{
global $registry;
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$attrs = array();
$state = &$_SESSION['SyncML.state'];
// Handle unauthorized first.
if (!$state->isAuthorized()) {
$status = new Horde_SyncML_Command_Status(RESPONSE_INVALID_CREDENTIALS, 'Alert');
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$status->setCmdRef($this->_cmdID);
$currentCmdID = $status->output($currentCmdID, $output);
return $currentCmdID;
}
$type = $this->_targetLocURI;
$clientAnchorNext = $this->_metaAnchorNext;
if ($this->_alert == ALERT_TWO_WAY ||
$this->_alert == ALERT_ONE_WAY_FROM_CLIENT ||
$this->_alert == ALERT_ONE_WAY_FROM_SERVER) {
// Check if we have information about previous sync.
$info = $state->getSyncSummary($this->_targetLocURI);
if (is_a($info, 'DataTreeObject')) {
$x = $info->get('ClientAnchor');
$clientlast = $x[$type];
$x = $info->get('ServerAnchor');
$serverAnchorLast = $x[$type];
} elseif (is_array($info)) {
$clientlast = $info['ClientAnchor'];
$serverAnchorLast = $info['ServerAnchor'];
} else {
$clientlast = false;
$serverAnchorLast = 0;
}
$state->setServerAnchorLast($type, $serverAnchorLast);
if ($clientlast !== false){
// Info about previous successful sync sessions found.
Horde::logMessage('SyncML: Previous sync found for target ' . $type
. '; client timestamp: ' . $clientlast,
__FILE__, __LINE__, PEAR_LOG_DEBUG);
// Check if anchor sent from client matches our own stored
// data.
if ($clientlast == $this->_metaAnchorLast) {
// Last sync anchors match, TwoWaySync will do.
$anchormatch = true;
Horde::logMessage('SyncML: Anchor timestamps match, TwoWaySync possible. Syncing data since '
. date('Y-m-d H:i:s', $serverAnchorLast),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
} else {
// Server and client have different anchors, enforce
// SlowSync/RefreshSync
Horde::logMessage('SyncML: Client requested sync with anchor timestamp '
. $this->_metaAnchorLast
. ' but server has recorded timestamp '
. $clientlast . '. Enforcing SlowSync',
__FILE__, __LINE__, PEAR_LOG_INFO);
$anchormatch = false;
$clientlast = 0;
}
} else {
// No info about previous sync, use SlowSync or RefreshSync.
Horde::logMessage('SyncML: No info about previous syncs found for device ' .
$state->getSourceURI() . ' and target ' . $type,
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$clientlast = 0;
$serverAnchorLast = 0;
$anchormatch = false;
}
} else {
// SlowSync requested, no anchor check required.
$anchormatch = true;
}
// Determine sync type and status response code.
Horde::logMessage("SyncML: Alert " . $this->_alert, __FILE__, __LINE__, PEAR_LOG_DEBUG);
switch ($this->_alert) {
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case ALERT_NEXT_MESSAGE:
$state->setAlert222Received(true);
case ALERT_RESULT_ALERT:
case ALERT_NO_END_OF_DATA:
// Nothing to do on our side
$status = new Horde_SyncML_Command_Status(RESPONSE_OK, 'Alert');
$status->setCmdRef($this->_cmdID);
if ($this->_sourceLocURI != null) {
$status->setSourceRef($this->_sourceLocURI);
}
if ($this->_targetLocURI != null) {
$status->setTargetRef((isset($this->_targetLocURIParameters) ? $this->_targetLocURI.'?/'.$this->_targetLocURIParameters : $this->_targetLocURI));
}
if ($this->_alert == ALERT_NEXT_MESSAGE) {
if ($this->_sourceLocURI != null) {
$status->setItemSourceLocURI($this->_sourceLocURI);
}
if ($this->_targetLocURI != null) {
$status->setItemTargetLocURI(isset($this->_targetLocURIParameters) ? $this->_targetLocURI.'?/'.$this->_targetLocURIParameters : $this->_targetLocURI);
}
}
$currentCmdID = $status->output($currentCmdID, $output);
return $currentCmdID;
case ALERT_TWO_WAY:
if ($anchormatch) {
$synctype = ALERT_TWO_WAY;
$response = RESPONSE_OK;
} else {
$synctype = ALERT_SLOW_SYNC;
$response = RESPONSE_REFRESH_REQUIRED;
}
break;
case ALERT_SLOW_SYNC:
$synctype = ALERT_SLOW_SYNC;
$response = $anchormatch ? RESPONSE_OK : RESPONSE_REFRESH_REQUIRED;
break;
case ALERT_ONE_WAY_FROM_CLIENT:
if ($anchormatch) {
$synctype = ALERT_ONE_WAY_FROM_CLIENT;
$response = RESPONSE_OK;
} else {
$synctype = ALERT_REFRESH_FROM_CLIENT;
$response = RESPONSE_REFRESH_REQUIRED;
}
break;
case ALERT_REFRESH_FROM_CLIENT:
$synctype = ALERT_REFRESH_FROM_CLIENT;
$response = $anchormatch ? RESPONSE_OK : RESPONSE_REFRESH_REQUIRED;
// We will erase the current server content,
// then we can add the client's contents.
$hordeType = $state->getHordeType($this->_targetLocURI);
$state->setTargetURI($this->_targetLocURI);
$deletes = $state->getClientItems();
if (is_array($deletes)) {
foreach ($deletes as $delete) {
$registry->call($hordeType . '/delete', array($delete));
}
Horde::logMessage("SyncML: RefreshFromClient " . count($deletes) . " entries deleted for $hordeType", __FILE__, __LINE__, PEAR_LOG_DEBUG);
}
$anchormatch = false;
break;
case ALERT_ONE_WAY_FROM_SERVER:
if ($anchormatch) {
$synctype = ALERT_ONE_WAY_FROM_SERVER;
$response = RESPONSE_OK;
} else {
$synctype = ALERT_REFRESH_FROM_SERVER;
$response = RESPONSE_REFRESH_REQUIRED;
}
break;
case ALERT_REFRESH_FROM_SERVER:
$synctype = ALERT_REFRESH_FROM_SERVER;
$response = $anchormatch ? RESPONSE_OK : RESPONSE_REFRESH_REQUIRED;
$anchormatch = false;
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break;
case ALERT_RESUME:
// @TODO: Suspend and Resume is not supported yet
$synctype = ALERT_SLOW_SYNC;
$response = RESPONSE_REFRESH_REQUIRED;
break;
default:
// We can't handle this one
Horde::logMessage('SyncML: Unknown sync type ' . $this->_alert,
__FILE__, __LINE__, PEAR_LOG_ERR);
$status = new Horde_SyncML_Command_Status(RESPONSE_BAD_REQUEST, 'Alert');
$status->setCmdRef($this->_cmdID);
if ($this->_sourceLocURI != null) {
$status->setSourceRef($this->_sourceLocURI);
}
if ($this->_targetLocURI != null) {
$status->setTargetRef((isset($this->_targetLocURIParameters) ? $this->_targetLocURI.'?/'.$this->_targetLocURIParameters : $this->_targetLocURI));
}
$currentCmdID = $status->output($currentCmdID, $output);
return $currentCmdID;
}
// Now set interval to retrieve server changes from, defined by
// ServerAnchor [Last,Next]
if ($synctype != ALERT_TWO_WAY &&
$synctype != ALERT_ONE_WAY_FROM_CLIENT &&
$synctype != ALERT_ONE_WAY_FROM_SERVER) {
$serverAnchorLast = 0;
if (isset($GLOBALS['egw_info']['user']['preferences']['syncml']['slowsync_ignore_map']) &&
$GLOBALS['egw_info']['user']['preferences']['syncml']['slowsync_ignore_map']
|| !$anchormatch) {
// Erase existing map
$state->removeAllUID($this->_targetLocURI);
}
}
// Now create the actual SyncML_Sync object, if it doesn't exist yet.
$sync = &$state->getSync($this->_targetLocURI);
if (!$sync) {
Horde::logMessage('SyncML: Creating SyncML_Sync object for target '
. $this->_targetLocURI . '; sync type ' . $synctype,
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$sync = &Horde_SyncML_Sync::factory($synctype);
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$state->clearConflictItems($this->_targetLocURI);
}
$sync->setTargetLocURI($this->_targetLocURI);
$sync->setSourceLocURI($this->_sourceLocURI);
$sync->setLocName($state->getLocName()); // We need it for conflict handling
$sync->setsyncType($synctype);
$sync->setFilterExpression($this->_filterExpression);
$state->setSync($this->_targetLocURI, $sync);
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$hordeType = $state->getHordeType($this->_targetLocURI);
$changes =& $registry->call($hordeType. '/listBy',
array('action' => 'modify',
'timestamp' => $serverAnchorLast,
'type' => $this->_targetLocURI,
'filter' => $this->_filterExpression));
$state->setChangedItems($this->_targetLocURI, $changes);
// Store client's Next Anchor in State and
// set server's Next Anchor. After successful sync
// this is then written to persistence for negotiation of
// further syncs.
$state->setClientAnchorNext($type, $this->_metaAnchorNext);
$serverAnchorNext = time();
$state->setServerAnchorNext($type, $serverAnchorNext);
$status = new Horde_SyncML_Command_Status($response, 'Alert');
$status->setCmdRef($this->_cmdID);
if ($this->_sourceLocURI != null) {
$status->setSourceRef($this->_sourceLocURI);
}
if ($this->_targetLocURI != null) {
$status->setTargetRef((isset($this->_targetLocURIParameters) ? $this->_targetLocURI.'?/'.$this->_targetLocURIParameters : $this->_targetLocURI));
}
// Mirror Next Anchor from client back to client.
if (isset($this->_metaAnchorNext)) {
$status->setItemDataAnchorNext($this->_metaAnchorNext);
}
// Mirror Last Anchor from client back to client.
if (isset($this->_metaAnchorLast)) {
$status->setItemDataAnchorLast($this->_metaAnchorLast);
}
$currentCmdID = $status->output($currentCmdID, $output);
$output->startElement($state->getURI(), 'Alert', $attrs);
$output->startElement($state->getURI(), 'CmdID', $attrs);
$chars = $currentCmdID;
$output->characters($chars);
$output->endElement($state->getURI(), 'CmdID');
$output->startElement($state->getURI(), 'Data', $attrs);
$chars = $synctype;
$output->characters($chars);
$output->endElement($state->getURI(), 'Data');
$output->startElement($state->getURI(), 'Item', $attrs);
if ($this->_sourceLocURI != null) {
$output->startElement($state->getURI(), 'Target', $attrs);
$output->startElement($state->getURI(), 'LocURI', $attrs);
$chars = $this->_sourceLocURI;
$output->characters($chars);
$output->endElement($state->getURI(), 'LocURI');
$output->endElement($state->getURI(), 'Target');
}
if ($this->_targetLocURI != null) {
$output->startElement($state->getURI(), 'Source', $attrs);
$output->startElement($state->getURI(), 'LocURI', $attrs);
$chars = (isset($this->_targetLocURIParameters) ? $this->_targetLocURI.'?/'.$this->_targetLocURIParameters : $this->_targetLocURI);
$output->characters($chars);
$output->endElement($state->getURI(), 'LocURI');
$output->endElement($state->getURI(), 'Source');
}
$output->startElement($state->getURI(), 'Meta', $attrs);
$output->startElement($state->getURIMeta(), 'Anchor', $attrs);
$output->startElement($state->getURIMeta(), 'Last', $attrs);
$chars = $state->getServerAnchorLast($type);
$output->characters($chars ? $chars : '0'); // Some devices don't like empty anchors
$output->endElement($state->getURIMeta(), 'Last');
$output->startElement($state->getURIMeta(), 'Next', $attrs);
$chars = $state->getServerAnchorNext($type);
$output->characters($chars);
$output->endElement($state->getURIMeta(), 'Next');
$output->endElement($state->getURIMeta(), 'Anchor');
$output->endElement($state->getURI(), 'Meta');
$output->endElement($state->getURI(), 'Item');
$output->endElement($state->getURI(), 'Alert');
// Final packet of this message
$state->_sendFinal = true;
$currentCmdID++;
if ($state->_devinfoRequested == false &&
$this->_sourceLocURI != null &&
is_a($state->getPreferedContentTypeClient($this->_sourceLocURI), 'PEAR_Error')) {
Horde::logMessage("SyncML: PreferedContentTypeClient missing, sending <Get>", __FILE__, __LINE__, PEAR_LOG_DEBUG);
$output->startElement($state->getURI(), 'Get', $attrs);
$output->startElement($state->getURI(), 'CmdID', $attrs);
$output->characters($currentCmdID);
$currentCmdID++;
$output->endElement($state->getURI(), 'CmdID');
$output->startElement($state->getURI(), 'Meta', $attrs);
$output->startElement($state->getURIMeta(), 'Type', $attrs);
if (is_a($output, 'XML_WBXML_Encoder')) {
$output->characters('application/vnd.syncml-devinf+wbxml');
} else {
$output->characters('application/vnd.syncml-devinf+xml');
}
$output->endElement($state->getURIMeta(), 'Type');
$output->endElement($state->getURI(), 'Meta');
$output->startElement($state->getURI(), 'Item', $attrs);
$output->startElement($state->getURI(), 'Target', $attrs);
$output->startElement($state->getURI(), 'LocURI', $attrs);
if ($state->getVersion() == 2) {
$output->characters('./devinf12');
} elseif ($state->getVersion() == 1) {
$output->characters('./devinf11');
} else {
$output->characters('./devinf10');
}
$output->endElement($state->getURI(), 'LocURI');
$output->endElement($state->getURI(), 'Target');
$output->endElement($state->getURI(), 'Item');
$output->endElement($state->getURI(), 'Get');
$state->_devinfoRequested = true;
}
return $currentCmdID;
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}
/**
* End element handler for the XML parser, delegated from
* SyncML_ContentHandler::endElement().
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*
* @param string $uri The namespace URI of the element.
* @param string $element The element tag name.
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*/
function endElement($uri, $element)
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{
switch (count($this->_stack)) {
case 2:
if ($element == 'Data') {
$this->_alert = intval(trim($this->_chars));
}
break;
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case 4:
if ($element == 'LocURI') {
switch ($this->_stack[2]) {
case 'Source':
$this->_sourceLocURI = trim($this->_chars);
break;
case 'Target':
$targetLocURIData = explode('?/',trim($this->_chars));
$this->_targetLocURI = $targetLocURIData[0];
if (isset($targetLocURIData[1])) {
$this->_targetLocURIParameters = $targetLocURIData[1];
}
break;
}
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}
break;
case 5:
switch ($element) {
case 'Next':
$this->_metaAnchorNext = trim($this->_chars);
break;
case 'Last':
$this->_metaAnchorLast = trim($this->_chars);
break;
}
break;
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case 7:
if ($element == 'Data'
&& $this->_stack[2] == 'Target'
&& $this->_stack[3] == 'Filter'
&& $this->_stack[4] == 'Record'
&& $this->_stack[5] == 'Item') {
$this->_filterExpression = trim($this->_chars);
}
break;
}
parent::endElement($uri, $element);
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}
}