nextcloud/3rdparty/Sabre/CardDAV/Plugin.php

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2011-07-20 17:53:34 +04:00
<?php
/**
* CardDAV plugin
*
* @package Sabre
* @subpackage CardDAV
* @copyright Copyright (C) 2007-2011 Rooftop Solutions. All rights reserved.
* @author Evert Pot (http://www.rooftopsolutions.nl/)
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
*/
/**
* The CardDAV plugin adds CardDAV functionality to the WebDAV server
*/
class Sabre_CardDAV_Plugin extends Sabre_DAV_ServerPlugin {
/**
* Url to the addressbooks
*/
const ADDRESSBOOK_ROOT = 'addressbooks';
/**
* xml namespace for CardDAV elements
*/
const NS_CARDDAV = 'urn:ietf:params:xml:ns:carddav';
/**
* Add urls to this property to have them automatically exposed as
* 'directories' to the user.
*
* @var array
*/
public $directories = array();
/**
* Server class
*
* @var Sabre_DAV_Server
*/
protected $server;
/**
* Initializes the plugin
*
* @param Sabre_DAV_Server $server
* @return void
*/
public function initialize(Sabre_DAV_Server $server) {
/* Events */
$server->subscribeEvent('beforeGetProperties', array($this, 'beforeGetProperties'));
$server->subscribeEvent('report', array($this,'report'));
/* Namespaces */
$server->xmlNamespaces[self::NS_CARDDAV] = 'card';
/* Mapping Interfaces to {DAV:}resourcetype values */
$server->resourceTypeMapping['Sabre_CardDAV_IAddressBook'] = '{' . self::NS_CARDDAV . '}addressbook';
$server->resourceTypeMapping['Sabre_CardDAV_IDirectory'] = '{' . self::NS_CARDDAV . '}directory';
/* Adding properties that may never be changed */
$server->protectedProperties[] = '{' . self::NS_CARDDAV . '}supported-address-data';
$server->protectedProperties[] = '{' . self::NS_CARDDAV . '}max-resource-size';
$this->server = $server;
}
/**
* Returns a list of supported features.
*
* This is used in the DAV: header in the OPTIONS and PROPFIND requests.
*
* @return array
*/
public function getFeatures() {
return array('addressbook');
}
/**
* Returns a list of reports this plugin supports.
*
* This will be used in the {DAV:}supported-report-set property.
* Note that you still need to subscribe to the 'report' event to actually
* implement them
*
* @param string $uri
* @return array
*/
public function getSupportedReportSet($uri) {
$node = $this->server->tree->getNodeForPath($uri);
if ($node instanceof Sabre_CardDAV_AddressBook || $node instanceof Sabre_CardDAV_ICard) {
return array(
'{' . self::NS_CARDDAV . '}addressbook-multiget',
);
}
return array();
}
/**
* Adds all CardDAV-specific properties
*
* @param string $path
* @param Sabre_DAV_INode $node
* @param array $requestedProperties
* @param array $returnedProperties
* @return void
*/
public function beforeGetProperties($path, Sabre_DAV_INode $node, array &$requestedProperties, array &$returnedProperties) {
if ($node instanceof Sabre_DAVACL_IPrincipal) {
// calendar-home-set property
$addHome = '{' . self::NS_CARDDAV . '}addressbook-home-set';
if (in_array($addHome,$requestedProperties)) {
$principalId = $node->getName();
$addressbookHomePath = self::ADDRESSBOOK_ROOT . '/' . $principalId . '/';
unset($requestedProperties[array_search($addHome, $requestedProperties)]);
$returnedProperties[200][$addHome] = new Sabre_DAV_Property_Href($addressbookHomePath);
}
$directories = '{' . self::NS_CARDDAV . '}directory-gateway';
if ($this->directories && in_array($directories, $requestedProperties)) {
unset($requestedProperties[array_search($directories, $requestedProperties)]);
$returnedProperties[200][$directories] = new Sabre_DAV_Property_HrefList($this->directories);
}
}
if ($node instanceof Sabre_CardDAV_ICard) {
// The address-data property is not supposed to be a 'real'
// property, but in large chunks of the spec it does act as such.
// Therefore we simply expose it as a property.
$addressDataProp = '{' . self::NS_CARDDAV . '}address-data';
if (in_array($addressDataProp, $requestedProperties)) {
unset($requestedProperties[$addressDataProp]);
$val = $node->get();
if (is_resource($val))
$val = stream_get_contents($val);
// Taking out \r to not screw up the xml output
$returnedProperties[200][$addressDataProp] = str_replace("\r","", $val);
}
}
}
/**
* This functions handles REPORT requests specific to CardDAV
*
* @param string $reportName
* @param DOMNode $dom
* @return bool
*/
public function report($reportName,$dom) {
switch($reportName) {
case '{'.self::NS_CARDDAV.'}addressbook-multiget' :
$this->addressbookMultiGetReport($dom);
return false;
case '{'.self::NS_CARDDAV.'}addressbook-query' :
$this->addressBookQueryReport($dom);
return false;
default :
return;
}
}
/**
* This function handles the addressbook-multiget REPORT.
*
* This report is used by the client to fetch the content of a series
* of urls. Effectively avoiding a lot of redundant requests.
*
* @param DOMNode $dom
* @return void
*/
public function addressbookMultiGetReport($dom) {
$properties = array_keys(Sabre_DAV_XMLUtil::parseProperties($dom->firstChild));
$hrefElems = $dom->getElementsByTagNameNS('urn:DAV','href');
$propertyList = array();
foreach($hrefElems as $elem) {
$uri = $this->server->calculateUri($elem->nodeValue);
list($propertyList[]) = $this->server->getPropertiesForPath($uri,$properties);
}
$this->server->httpResponse->sendStatus(207);
$this->server->httpResponse->setHeader('Content-Type','application/xml; charset=utf-8');
$this->server->httpResponse->sendBody($this->server->generateMultiStatus($propertyList));
}
/**
* This function handles the addressbook-query REPORT
*
* This report is used by the client to filter an addressbook based on a
* complex query.
*
* @param DOMNode $dom
* @return void
*/
protected function addressbookQueryReport($dom) {
$query = new Sabre_CardDAV_AddressBookQueryParser($dom);
$query->parse();
$depth = $this->server->getHTTPDepth(0);
if ($depth==0) {
$candidateNodes = array(
$this->server->tree->getNodeForPath($this->server->getRequestUri())
);
} else {
$candidateNodes = $this->server->tree->getChildren($this->server->getRequestUri());
}
$validNodes = array();
foreach($candidateNodes as $node) {
if (!$node instanceof Sabre_CardDAV_ICard)
continue;
$blob = $node->get();
if (is_resource($blob)) {
$blob = stream_get_contents($blob);
}
if (!$this->validateFilters($blob, $query->filters, $query->test)) {
continue;
}
$validNodes[] = $node;
if ($query->limit && $query->limit <= count($validNodes)) {
// We hit the maximum number of items, we can stop now.
break;
}
}
$result = array();
foreach($validNodes as $validNode) {
if ($depth==0) {
$href = $this->server->getRequestUri();
} else {
$href = $this->server->getRequestUri() . '/' . $validNode->getName();
}
list($result[]) = $this->server->getPropertiesForPath($href, $query->requestedProperties, 0);
}
$this->server->httpResponse->sendStatus(207);
$this->server->httpResponse->setHeader('Content-Type','application/xml; charset=utf-8');
$this->server->httpResponse->sendBody($this->server->generateMultiStatus($result));
}
/**
* Validates if a vcard makes it throught a list of filters.
*
* @param string $vcardData
* @param array $filters
* @param string $test anyof or allof (which means OR or AND)
* @return bool
*/
public function validateFilters($vcardData, array $filters, $test) {
$vcard = Sabre_VObject_Reader::read($vcardData);
$success = true;
foreach($filters as $filter) {
$isDefined = isset($vcard->{$filter['name']});
if ($filter['is-not-defined']) {
if ($isDefined) {
$success = false;
} else {
$success = true;
}
} elseif ((!$filter['param-filters'] && !$filter['text-matches']) || !$isDefined) {
// We only need to check for existence
$success = $isDefined;
} else {
$vProperties = $vcard->select($filter['name']);
$results = array();
if ($filter['param-filters']) {
$results[] = $this->validateParamFilters($vProperties, $filter['param-filters'], $filter['test']);
}
if ($filter['text-matches']) {
$texts = array();
foreach($vProperties as $vProperty)
$texts[] = $vProperty->value;
$results[] = $this->validateTextMatches($texts, $filter['text-matches'], $filter['test']);
}
if (count($results)===1) {
$success = $results[0];
} else {
if ($filter['test'] === 'anyof') {
$success = $results[0] || $results[1];
} else {
$success = $results[0] && $results[1];
}
}
} // else
// There are two conditions where we can already determine wether
// or not this filter succeeds.
if ($test==='anyof' && $success) {
return true;
}
if ($test==='allof' && !$success) {
return false;
}
} // foreach
// If we got all the way here, it means we haven't been able to
// determine early if the test failed or not.
//
// This implies for 'anyof' that the test failed, and for 'allof' that
// we succeeded. Sounds weird, but makes sense.
return $test==='allof';
}
/**
* Validates if a param-filter can be applied to a specific property.
*
* @todo currently we're only validating the first parameter of the passed
* property. Any subsequence parameters with the same name are
* ignored.
* @param Sabre_VObject_Property $vProperty
* @param array $filters
* @param string $test
* @return bool
*/
protected function validateParamFilters(array $vProperties, array $filters, $test) {
$success = false;
foreach($filters as $filter) {
$isDefined = false;
foreach($vProperties as $vProperty) {
$isDefined = isset($vProperty[$filter['name']]);
if ($isDefined) break;
}
if ($filter['is-not-defined']) {
if ($isDefined) {
$success = false;
} else {
$success = true;
}
// If there's no text-match, we can just check for existence
} elseif (!$filter['text-match'] || !$isDefined) {
$success = $isDefined;
} else {
$texts = array();
$success = false;
foreach($vProperties as $vProperty) {
// If we got all the way here, we'll need to validate the
// text-match filter.
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$success = Sabre_DAV_StringUtil::textMatch($vProperty[$filter['name']]->value, $filter['text-match']['value'], $filter['text-match']['collation'], $filter['text-match']['match-type']);
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if ($success) break;
}
if ($filter['text-match']['negate-condition']) {
$success = !$success;
}
} // else
// There are two conditions where we can already determine wether
// or not this filter succeeds.
if ($test==='anyof' && $success) {
return true;
}
if ($test==='allof' && !$success) {
return false;
}
}
// If we got all the way here, it means we haven't been able to
// determine early if the test failed or not.
//
// This implies for 'anyof' that the test failed, and for 'allof' that
// we succeeded. Sounds weird, but makes sense.
return $test==='allof';
}
/**
* Validates if a text-filter can be applied to a specific property.
*
* @param array $texts
* @param array $filters
* @param string $test
* @return bool
*/
protected function validateTextMatches(array $texts, array $filters, $test) {
foreach($filters as $filter) {
$success = false;
foreach($texts as $haystack) {
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$success = Sabre_DAV_StringUtil::textMatch($haystack, $filter['value'], $filter['collation'], $filter['match-type']);
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// Breaking on the first match
if ($success) break;
}
if ($filter['negate-condition']) {
$success = !$success;
}
if ($success && $test==='anyof')
return true;
if (!$success && $test=='allof')
return false;
}
// If we got all the way here, it means we haven't been able to
// determine early if the test failed or not.
//
// This implies for 'anyof' that the test failed, and for 'allof' that
// we succeeded. Sounds weird, but makes sense.
return $test==='allof';
}
}