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<?php
/**
* Nextcloud - Gallery
*
* This file is licensed under the Affero General Public License version 3 or
* later. See the COPYING file.
*
* @author Olivier Paroz <galleryapps@oparoz.com>
*
* @copyright Olivier Paroz 2017
*/
namespace OCA\Gallery\Service;
use OCP\Files\Folder;
use OCA\Gallery\Environment\NotFoundEnvException;
/**
* Looks for the folder to use, based on the request made by the client
*
* This is to make sure we were not:
* * given a file
* * given a folder name with a typo
*
* @package OCA\Gallery\Service
*/
class SearchFolderService extends FilesService {
/**
* @var int
*/
protected $virtualRootLevel = null;
/**
* This returns what we think is the current folder node based on a given path
*
* @param string $location
* @param string[] $features
*
* @return array <string,Folder,bool>
*/
public function getCurrentFolder($location, $features) {
$this->features = $features;
return $this->findFolder($location);
}
/**
* This returns the current folder node based on a path
*
* If the path leads to a file, we'll return the node of the containing folder
*
* If we can't find anything, we try with the parent folder, up to the root or until we reach
* our recursive limit
*
* @param string $location
* @param int $depth
*
* @return array <string,Folder,bool>
*/
private function findFolder($location, $depth = 0) {
$node = null;
$location = $this->validateLocation($location, $depth);
try {
$node = $this->environment->getNodeFromVirtualRoot($location);
if ($node->getType() === 'file') {
$node = $node->getParent();
}
} catch (NotFoundEnvException $exception) {
// There might be a typo in the file or folder name
$folder = pathinfo($location, PATHINFO_DIRNAME);
$depth++;
return $this->findFolder($folder, $depth);
}
$path = $this->environment->getPathFromVirtualRoot($node);
return $this->sendFolder($path, $node);
}
/**
* Makes sure we don't go too far up before giving up
*
* @param string $location
* @param int $depth
*
* @return string
*/
private function validateLocation($location, $depth) {
if ($depth === 4) {
// We can't find anything, so we decide to return data for the root folder
$location = '';
}
return $location;
}
/**
* Makes sure that the folder is not empty, does meet our requirements in terms of location and
* returns details about it
*
* @param string $path
* @param Folder $node
*
* @return array <string,Folder,bool>
* @throws ForbiddenServiceException|NotFoundServiceException
*/
private function sendFolder($path, $node) {
if (is_null($node)) {
// Something very wrong has just happened
throw new NotFoundServiceException('Oh Nooooes!');
} elseif (!$this->isAllowedAndAvailable($node)) {
throw new ForbiddenServiceException(
'The owner has placed a restriction or the storage location is unavailable'
);
}
return [$path, $node];
}
}