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<?php
/**
* SabreDAV File Backend implementation for Kolab.
*
* @author Aleksander Machniak <machniak@kolabsys.com>
*
* Copyright (C) 2013, 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/>.
*/
namespace Kolab\DAV;
use \rcube;
use \Exception;
use \DateTime;
/**
* File class
*/
class File extends Node implements \Sabre\DAV\IFile, \Sabre\DAV\IProperties
{
/**
* Updates the data
*
* The data argument is a readable stream resource.
*
* After a succesful put operation, you may choose to return an ETag. The
* etag must always be surrounded by double-quotes. These quotes must
* appear in the actual string you're returning.
*
* Clients may use the ETag from a PUT request to later on make sure that
* when they update the file, the contents haven't changed in the mean
* time.
*
* If you don't plan to store the file byte-by-byte, and you return a
* different object on a subsequent GET you are strongly recommended to not
* return an ETag, and just return null.
*
* @param resource $data
* @return string|null
*/
public function put($data)
{
$filedata = $this->fileData($this->path, $data);
try {
$this->backend->file_update($this->path, $filedata);
}
catch (Exception $e) {
// throw new \Sabre\DAV\Exception\Forbidden($e->getMessage());
}
try {
$this->data = $this->backend->file_info($this->path);
}
catch (Exception $e) {
}
return $this->getETag();
}
/**
* Returns the file content
*
* This method may either return a string or a readable stream resource
*
* @return mixed
*/
public function get()
{
try {
$fp = fopen('php://temp', 'bw+');
$this->backend->file_get($this->path, array(), $fp);
rewind($fp);
}
catch (Exception $e) {
// throw new \Sabre\DAV\Exception\Forbidden($e->getMessage());
}
return $fp;
}
/**
* Delete the current file
*
* @return void
*/
public function delete()
{
try {
$this->backend->file_delete($this->path);
}
catch (Exception $e) {
// throw new \Sabre\DAV\Exception\Forbidden($e->getMessage());
}
// reset cache
if ($this->parent) {
$this->parent->children = null;
}
}
/**
* Returns the size of the node, in bytes
*
* @return int
*/
public function getSize()
{
return $this->data['size'];
}
/**
* Returns the ETag for a file
*
* An ETag is a unique identifier representing the current version of the file. If the file changes, the ETag MUST change.
* The ETag is an arbitrary string, but MUST be surrounded by double-quotes.
*
* Return null if the ETag can not effectively be determined
*
* @return mixed
*/
public function getETag()
{
return sprintf('"%s-%d"', substr(md5($this->path . ':' . $this->data['size']), 0, 16), $this->data['modified']);
}
/**
* Returns the mime-type for a file
*
* If null is returned, we'll assume application/octet-stream
*
* @return mixed
*/
public function getContentType()
{
return $this->data['type'];
}
/**
* Updates properties on this node,
*
* The properties array uses the propertyName in clark-notation as key,
* and the array value for the property value. In the case a property
* should be deleted, the property value will be null.
*
* This method must be atomic. If one property cannot be changed, the
* entire operation must fail.
*
* If the operation was successful, true can be returned.
* If the operation failed, false can be returned.
*
* Deletion of a non-existent property is always successful.
*
* Lastly, it is optional to return detailed information about any
* failures. In this case an array should be returned with the following
* structure:
*
* array(
* 403 => array(
* '{DAV:}displayname' => null,
* ),
* 424 => array(
* '{DAV:}owner' => null,
* )
* )
*
* In this example it was forbidden to update {DAV:}displayname.
* (403 Forbidden), which in turn also caused {DAV:}owner to fail
* (424 Failed Dependency) because the request needs to be atomic.
*
* @param array $mutations
* @return bool|array
*/
function updateProperties($mutations)
{
// not supported
return false;
}
/**
* Returns a list of properties for this node.
*
* The properties list is a list of propertynames the client requested,
* encoded in clark-notation {xmlnamespace}tagname
*
* If the array is empty, it means 'all properties' were requested.
*
* Note that it's fine to liberally give properties back, instead of
* conforming to the list of requested properties.
* The Server class will filter out the extra.
*
* @param array $properties
* @return void
*/
function getProperties($properties)
{
$result = array();
if ($this->data['created']) {
$result['{DAV:}creationdate'] = \Sabre\HTTP\Util::toHTTPDate(new DateTime('@'.$this->data['created']));
}
return $result;
}
}
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