KT_cmis_atom_service_helper.inc.php
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<?php
// initialise ktapi instance
KT_cmis_atom_service_helper::$ktapi = KT_cmis_atom_service_helper::getKt();
class KT_cmis_atom_service_helper {
public static $ktapi = null;
public static $repositoryId = null;
/**
* Helper function to set internal repository id
*
* @param object $RepositoryService
*/
static public function setRepositoryId(&$RepositoryService = null)
{
if (is_null($RepositoryService)) {
$RepositoryService = new RepositoryService();
}
$repositories = $RepositoryService->getRepositories();
// TODO handle multiple repositories
self::$repositoryId = $repositories[0]['repositoryId'];
}
/**
* Helper function to fetch internal repository id
*
* Calls set function automatically, use $set = false to prevent this and return the current setting, if any
*
* NOTE the function will automatically call the setRepositoryId function if no previous repository id was set
*
* @param object $RepositoryService
* @param boolean $RepositoryService
* @return string
*/
static public function getRepositoryId(&$RepositoryService = null, $set = true)
{
if (empty(self::$repositoryId) || $set) {
self::setRepositoryId($RepositoryService);
}
return self::$repositoryId;
}
/**
* Retrieves data about a specific folder OR document within a folder
*
* @param object $ObjectService The CMIS service
* @param string $repositoryId
* @param string $folderId
* @return string CMIS AtomPub feed
*/
static public function getObjectFeed(&$service, $ObjectService, $repositoryId, $objectId, $method = 'GET')
{
self::$repositoryId = $repositoryId;
$serviceType = $service->getServiceType();
$response = $ObjectService->getProperties($repositoryId, $objectId, false, false);
if (PEAR::isError($response)) {
return KT_cmis_atom_service_helper::getErrorFeed($service, KT_cmis_atom_service::STATUS_SERVER_ERROR, $response->getMessage());
}
$cmisEntry = $response;
$response = null;
// POST/PWC responses only send back an entry, not a feed
if (($serviceType == 'PWC') || ($method == 'POST')) {
if ($method == 'POST') {
$response = new KT_cmis_atom_response_POST(CMIS_APP_BASE_URI);
}
else {
$response = new KT_cmis_atom_response_GET(CMIS_APP_BASE_URI);
}
}
else if ($method == 'GET') {
$response = new KT_cmis_atom_responseFeed_GET(CMIS_APP_BASE_URI);
$response->newField('title', $cmisEntry['properties']['objectTypeId']['value'], $response);
$response->newField('id', 'urn:uuid:' . $cmisEntry['properties']['objectId']['value'], $response);
}
if ($serviceType == 'PWC') $pwc = true; else $pwc = false;
KT_cmis_atom_service_helper::createObjectEntry($response, $cmisEntry, $cmisEntry['properties']['parentId']['value'], $pwc, $method);
// Don't think this should be here...only one item so why would we need to say there are no more?
/*if ($method == 'GET') {
$response->newField('cmis:hasMoreItems', 'false', $response);
}*/
return $response;
}
/**
* Creates an AtomPub entry for a CMIS entry and adds it to the supplied feed
*
* @param object $feed The feed to which we add the entry
* @param array $cmisEntry The entry data
* @param string $parent The parent folder
* @param boolean $pwc Whether this is a PWC object
* @param $method The request method used (POST/GET/...)
*/
static public function createObjectEntry(&$response, $cmisEntry, $parent, $pwc = false, $method = 'GET')
{
$workspace = $response->getWorkspace();
$type = strtolower($cmisEntry['properties']['objectTypeId']['value']);
// create entry
$entry = $response->newEntry();
// When request is a POST we will be returning only an object entry, not a full feed, and so this belongs here
if (($method == 'POST') || $pwc)
{
// append attributes
$entry->appendChild($response->newAttr('xmlns', 'http://www.w3.org/2005/Atom'));
$entry->appendChild($response->newAttr('xmlns:app', 'http://www.w3.org/2007/app'));
$entry->appendChild($response->newAttr('xmlns:cmis', 'http://docs.oasis-open.org/ns/cmis/core/200908/'));
$entry->appendChild($response->newAttr('xmlns:cmisra', 'http://docs.oasis-open.org/ns/cmis/restatom/200908/'));
}
// TODO dynamic actual creator name
$responseElement = $response->newField('author');
$element = $response->newField('name', 'admin', $responseElement);
$entry->appendChild($responseElement);
$typeString = str_replace('cmis:', '', $type);
if (!empty($cmisEntry['properties']['contentStreamLength']['value']))
{
$field = $response->newElement('content');
$field->appendChild($response->newAttr('type', $cmisEntry['properties']['contentStreamMimeType']['value']));
$field->appendChild($response->newAttr('src', CMIS_APP_BASE_URI . $workspace . '/' . $typeString
. '/' . $cmisEntry['properties']['objectId']['value']
. '/' . $cmisEntry['properties']['contentStreamFilename']['value']));
$entry->appendChild($field);
}
// content & id tags
$id = $cmisEntry['properties']['objectId']['value'];
$response->newField('id', 'urn:uuid:' . $id, $entry);
// links
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'self'));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/'
. (!$pwc ? $typeString : 'pwc') . '/'
. $cmisEntry['properties']['objectId']['value']));
$entry->appendChild($link);
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'edit'));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/' . $typeString
. '/' . $cmisEntry['properties']['objectId']['value']));
$entry->appendChild($link);
if ((strtolower($cmisEntry['properties']['objectTypeId']['value']) == 'cmis:document')
&& (!empty($cmisEntry['properties']['contentStreamLength']['value'])))
{
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'edit-media'));
$link->appendChild($response->newAttr('type', $cmisEntry['properties']['contentStreamMimeType']['value']));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/' . $typeString
. '/' . $cmisEntry['properties']['objectId']['value']
. '/' . $cmisEntry['properties']['contentStreamFilename']['value']));
$entry->appendChild($link);
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'enclosure'));
$link->appendChild($response->newAttr('type', $cmisEntry['properties']['contentStreamMimeType']['value']));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/' . $typeString
. '/' . $cmisEntry['properties']['objectId']['value']
. '/' . $cmisEntry['properties']['contentStreamFilename']['value']));
$entry->appendChild($link);
}
// according to spec this MUST be present, but spec says that links for function which are not supported
// do not need to be present, so unsure for the moment
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'http://docs.oasis-open.org/ns/cmis/link/200908/allowableactions'));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/' . $typeString . '/'
. $cmisEntry['properties']['objectId']['value'] . '/allowableactions'));
$entry->appendChild($link);
// according to spec this MUST be present, but spec says that links for function which are not supported
// do not need to be present, so unsure for the moment
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'http://docs.oasis-open.org/ns/cmis/link/200908/relationships'));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/' . $typeString . '/'
. $cmisEntry['properties']['objectId']['value'] . '/rels'));
$entry->appendChild($link);
// if there is no parent or parent is 0, do not add the parent link
// also if this is specifically the root folder, do not add the parent link
// if (!empty($cmisEntry['properties']['parentId']['value']) && !CMISUtil::isRootFolder(self::$repositoryId, $cmisEntry['properties']['objectId']['value']))
if (!CMISUtil::isRootFolder(self::$repositoryId, $cmisEntry['properties']['objectId']['value'], self::$ktapi))
{
// TODO check parent link is correct, fix if needed
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'up'));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/folder/'
. $cmisEntry['properties']['parentId']['value']));
$entry->appendChild($link);
}
// Folder/Document specific links
if (strtolower($cmisEntry['properties']['objectTypeId']['value']) == 'cmis:folder')
{
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'down'));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/'
. $typeString
. '/' . $cmisEntry['properties']['objectId']['value']
. '/children'));
$entry->appendChild($link);
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'down'));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/'
. $typeString
. '/' . $cmisEntry['properties']['objectId']['value']
. '/descendants'));
$entry->appendChild($link);
// TODO add folder tree link when we have folder tree implemented
// this will probably use (much) the same code as the folder children functionality
}
else if (strtolower($cmisEntry['properties']['objectTypeId']['value']) == 'cmis:document')
{
// if there is a content stream, this link MUST be present
// not sure yet where it must point...
if (!empty($cmisEntry['properties']['contentStreamLength']['value']))
{
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'stream'));
$link->appendChild($response->newAttr('type', $cmisEntry['properties']['contentStreamMimeType']['value']));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/' . $type
. '/' . $cmisEntry['properties']['objectId']['value']
. '/' . $cmisEntry['properties']['contentStreamFilename']['value']));
$entry->appendChild($link);
}
// if the document is checked out and this is NOT the PWC, this link MUST be present
// NOTE at the moment the document and the PWC are the same object, so we always show it for a checked out document
// TODO separated code for PWC and actual document object
if (!empty($cmisEntry['properties']['versionSeriesCheckedOutId']['value']))
{
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'pwc'));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/' . $type
. '/' . $cmisEntry['properties']['objectId']['value']
. '/' . $cmisEntry['properties']['contentStreamFilename']['value']));
$entry->appendChild($link);
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'source'));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/' . $type
. '/' . $cmisEntry['properties']['objectId']['value']
. '/' . $cmisEntry['properties']['contentStreamFilename']['value']));
$entry->appendChild($link);
}
// $link = $response->newElement('link');
// $link->appendChild($response->newAttr('rel', 'stream'));
// $link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/' . $type
// . '/' . $cmisEntry['properties']['objectId']['value']
// . '/' . $cmisEntry['properties']['contentStreamFilename']['value']));
}
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'describedby'));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/type/' . $type));
$entry->appendChild($link);
$link = $response->newElement('link');
$link->appendChild($response->newAttr('rel', 'service'));
$link->appendChild($response->newAttr('href', CMIS_APP_BASE_URI . '/servicedocument'));
$entry->appendChild($link);
// TODO proper date
$entry->appendChild($response->newField('published', self::formatDatestamp()));
$entry->appendChild($response->newElement('summary', $cmisEntry['properties']['name']['value']));
$entry->appendChild($response->newElement('title', $cmisEntry['properties']['name']['value']));
$entry->appendChild($response->newField('updated', self::formatDatestamp()));
// main CMIS entry
$objectElement = $response->newElement('cmisra:object');
$propertiesElement = $response->newElement('cmis:properties');
foreach($cmisEntry['properties'] as $propertyName => $property)
{
$propElement = $response->newElement('cmis:' . $property['type']);
// $propElement->appendChild($response->newAttr('localName', 'rep-cmis:' . $propertyName));
$propElement->appendChild($response->newAttr('propertyDefinitionId', 'cmis:' . $propertyName));
if (!empty($property['value']))
{
if ($propertyName == 'contentStreamUri') {
$property['value'] = CMIS_APP_BASE_URI . $workspace . '/' . $type . '/' .$property['value'];
}
$response->newField('cmis:value', CMISUtil::boolToString($property['value']), $propElement);
}
$propertiesElement->appendChild($propElement);
}
$objectElement->appendChild($propertiesElement);
$entry->appendChild($objectElement);
// after every entry, append a cmis:terminator tag
// $entry->appendChild($response->newElement('cmis:terminator'));
// TODO check determination of when to add app:edited tag
// if ($method == 'POST') {
$entry->appendChild($response->newElement('app:edited', self::formatDatestamp()));
// }
}
/**
* Retrieves the list of types|type definition as a CMIS AtomPub feed
*
* @param string $typeDef Type requested - 'All Types' indicates a listing, else only a specific type
* @param array $types The types found
* @return string CMIS AtomPub feed
*/
static public function getTypeFeed($typeDef, $types)
{
$typesString = '';
$typesHeading = '';
switch($typeDef)
{
case 'all':
case 'children':
case 'descendants':
$typesString = 'types-' . $typeDef;
$typesHeading = 'All Types';
break;
default:
$typesString = 'type-' . $typeDef;
$typesHeading = $typeDef;
break;
}
//Create a new response feed
$feed = new KT_cmis_atom_responseFeed_GET(CMIS_APP_BASE_URI);
$workspace = $feed->getWorkspace();
$feed->newField('title', $typesHeading, $feed);
$feed->newField('id', 'urn:uuid:' . $typesString, $feed);
// TODO set page number correctly - to be done when we support paging the the API
// author
// TODO generate this dynamically (based on???)\
$feedElement = $feed->newField('author');
$element = $feed->newField('name', 'admin', $feedElement);
$feed->appendChild($feedElement);
// NOTE spec says this link MUST be present but is vague on where it points
// as of 0.61c:
// "The source link relation points to the underlying CMIS Type Definition as Atom Entry"
// so what is the underlying CMIS Type Definition for a collection of base types?
// suspect that it only applies when not listing all types, i.e. a base type is asked for
/*
$link = $feed->newElement('link');
$link->appendChild($feed->newAttr('rel','source'));
$link->appendChild($feed->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/type/' . strtolower($type['typeId'])));
$feed->appendChild($link);
*/
// current time: format = 2009-07-13T14:49:27.659+02:00
$feed->appendChild($feed->newElement('updated', self::formatDatestamp()));
foreach($types as $type)
{
$entry = $feed->newEntry();
$feedElement = $feed->newField('author');
$element = $feed->newField('name', 'admin', $feedElement);
$entry->appendChild($feedElement);
$feedElement = $feed->newField('content', $type['typeId']);
$entry->appendChild($feedElement);
$feed->newField('id', 'urn:uuid:type-' . $type['typeId'], $feed);
// TODO add parents link when not selecting a base type.
// TODO add children link when type has children
// TODO add descendants link when type has children
// NOTE KnowledgeTree currently only supports base types so these are not important at the present time.
// links
$link = $feed->newElement('link');
$link->appendChild($feed->newAttr('rel','self'));
$link->appendChild($feed->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/type/' . strtolower($type['typeId'])));
$entry->appendChild($link);
// TODO type link MUST point to base type
// KnowledgeTree currently only supports base types so this is not important
// at the present time as it will always point at the base type.
$link = $feed->newElement('link');
$link->appendChild($feed->newAttr('rel','type'));
$link->appendChild($feed->newAttr('href', CMIS_APP_BASE_URI . $workspace . '/type/' . strtolower($type['typeId'])));
$entry->appendChild($link);
$link = $feed->newElement('link');
$link->appendChild($feed->newAttr('rel','repository'));
$link->appendChild($feed->newAttr('href', CMIS_APP_BASE_URI . '/servicedocument'));
$entry->appendChild($link);
$entry->appendChild($feed->newElement('summary', $type['typeId'] . ' Type'));
$entry->appendChild($feed->newElement('title', $type['typeId']));
$entry->appendChild($feed->newElement('updated', self::formatDatestamp()));
// main CMIS entry
$feedElement = $feed->newElement('cmis:' . strtolower($type['typeId']) . 'Type');
foreach($type as $property => $value)
{
$feed->newField('cmis:' . $property, CMISUtil::boolToString($value), $feedElement);
}
$entry->appendChild($feedElement);
// after every entry, append a cmis:terminator tag
// $entry->appendChild($feed->newElement('cmis:terminator'));
}
return $feed;
}
static public function getErrorFeed(&$service, $status, $message)
{
$service->setStatus($status);
$feed = new KT_cmis_atom_responseFeed_GET(CMIS_APP_BASE_URI);
$feed->newField('title', 'Error: ' . $status, $feed);
$entry = $feed->newEntry();
$feed->newField('error', $message, $entry);
return $feed;
}
/**
* Fetches the CMIS objectId based on the path
*
* @param array $path
* @param object $ktapi KTAPI instance
*/
// TODO make this much more efficient than this method
static public function getFolderId($path, &$ktapi)
{
// lose first item
array_shift($path);
$numQ = count($path);
$numFolders = $numQ;
$folderId = 1;
$start = 0;
while($start < $numFolders)
{
$name = $path[$numQ-$numFolders+$start];
// fix for possible url encoding issue
$name = str_replace('%2520', '%20', $name);
$folderName = urldecode($name);
$folder = $ktapi->get_folder_by_name($folderName, $folderId);
$folderId = $folder->get_folderid();
++$start;
}
return CMISUtil::encodeObjectId(FOLDER, $folderId);
}
static public function getCmisProperties($xmlArray)
{
$properties = array();
// find cmisra:object tag
$baseCmisObject = KT_cmis_atom_service_helper::findTag('cmisra:object', $xmlArray, null, false);
if(count($baseCmisObject) <= 0)
{
$entryObject = KT_cmis_atom_service_helper::findTag('entry', $xmlArray, null, false);
$baseCmisObject = KT_cmis_atom_service_helper::findTag('cmisra:object', $entryObject['@children'], null, true);
}
if(count($baseCmisObject)>0)
{
foreach($baseCmisObject['@children'] as $key => $childElement)
{
if ($key == 'cmis:properties')
{
foreach($childElement[0]['@children'] as $cmisPropertyDefinition)
{
foreach($cmisPropertyDefinition as $propertyType => $propertyDefinition)
{
$properties[$propertyDefinition['@attributes']['cmis:name']] = $propertyDefinition['@children']['cmis:value'][0]['@value'];
}
}
}
}
}
return $properties;
}
static public function getAtomValues($xmlArray, $tag)
{
if (!is_null($xmlArray['atom:'.$tag]))
return $xmlArray['atom:'.$tag][0]['@value'];
else if (!is_null($xmlArray[$tag]))
return $xmlArray[$tag][0]['@value'];
return null;
}
/**
* Get the KT singleton instance
*
* @return object
*/
public static function getKt()
{
if(!isset(self::$ktapi))
{
self::$ktapi = new KTAPI();
$active = self::$ktapi->get_active_session(session_id());
if (PEAR::isError($active))
{
// invoke auth code, session must be restarted
if(!KT_atom_HTTPauth::isLoggedIn()) {
KT_atom_HTTPauth::login('KnowledgeTree DMS', 'You must authenticate to enter this realm');
}
}
}
return self::$ktapi;
}
// TODO adjust for time zones?
static public function formatDatestamp($time = null)
{
if (is_null($time)) $time = time();
return date('Y-m-d H:i:s', $time);
}
/**
* Fetches the document content stream for internal use
*
* @param object $ObjectService
* @param string $repositoryId
* @return null | string $contentStream
*/
static public function getContentStream(&$service, &$ObjectService, $repositoryId)
{
$response = $ObjectService->getProperties($repositoryId, $service->params[0], false, false);
if (PEAR::isError($response)) {
return null;
}
$contentStream = $ObjectService->getContentStream($repositoryId, $service->params[0]);
return $contentStream;
}
/**
* Fetches and prepares the document content stream for download/viewing
*
* @param object $ObjectService
* @param string $repositoryId
* @return null | nothing
*/
static public function downloadContentStream(&$service, &$ObjectService, $repositoryId)
{
$response = $ObjectService->getProperties($repositoryId, $service->params[0], false, false);
if (PEAR::isError($response)) {
$feed = KT_cmis_atom_service_helper::getErrorFeed($service, KT_cmis_atom_service::STATUS_SERVER_ERROR, $response->getMessage());
$service->responseFeed = $feed;
return null;
}
// TODO also check If-Modified-Since?
// $service->headers['If-Modified-Since'] => 2009-07-24 17:16:54
$service->setContentDownload(true);
$eTag = md5($response['properties']['lastModificationDate']['value'] . $response['properties']['contentStreamLength']['value']);
if ($service->headers['If-None-Match'] == $eTag)
{
$service->setStatus(KT_cmis_atom_service::STATUS_NOT_MODIFIED);
$service->setContentDownload(false);
return null;
}
$contentStream = $ObjectService->getContentStream($repositoryId, $service->params[0]);
// headers specific to output
$service->setEtag($eTag);
$service->setHeader('Last-Modified', $response['properties']['lastModificationDate']['value']);
if (!empty($response['properties']['contentStreamMimeType']['value'])) {
$service->setHeader('Content-type', $response['properties']['contentStreamMimeType']['value'] . ';charset=utf-8');
}
else {
$service->setHeader('Content-type', 'text/plain;charset=utf-8');
}
$service->setHeader('Content-Disposition', 'attachment;filename="' . $response['properties']['contentStreamFilename']['value'] . '"');
$service->setHeader('Content-Length', $response['properties']['contentStreamLength']['value']);
$service->setOutput($contentStream);
}
//TODO: Add key information to be able to find the same tag in the original struct (MarkH)
static public function findTag($tagName=NULL,$xml=array(),$tagArray=NULL,$deep=false){
$tagArray=is_array($tagArray)?$tagArray:array();
foreach($xml as $xmlTag=>$content){
if($xmlTag===$tagName){
$tagArray[]=$content;
}
if($deep){
foreach($content as $contentTags){
if(is_array($contentTags['@children'])) {
if(count($contentTags['@children'])>0) $tagArray=self::findTag($tagName,$contentTags['@children'],$tagArray);
}
}
}
}
//TODO: this is very ugly. Change it. (MarkH)
return self::rebaseArray($tagArray);
}
static public function rebaseArray($arr=array()){
//Force Array
$arr=is_array($arr)?$arr:array();
//Rebase recursively
if(count($arr)===1)$arr=self::rebaseArray($arr[0]);
return $arr;
}
}
?>