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<?php
/**
* SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OCA\Files_Sharing\ShareBackend;
use OC\Files\Filesystem;
use OC\Files\View;
use OCA\FederatedFileSharing\FederatedShareProvider;
use OCA\Files_Sharing\Helper;
use OCP\Files\NotFoundException;
use OCP\IDBConnection;
use OCP\Server;
use OCP\Share\IShare;
use OCP\Share_Backend_File_Dependent;
use Psr\Log\LoggerInterface;
class File implements Share_Backend_File_Dependent {
public const FORMAT_SHARED_STORAGE = 0;
public const FORMAT_GET_FOLDER_CONTENTS = 1;
public const FORMAT_FILE_APP_ROOT = 2;
public const FORMAT_OPENDIR = 3;
public const FORMAT_GET_ALL = 4;
public const FORMAT_PERMISSIONS = 5;
public const FORMAT_TARGET_NAMES = 6;
private $path;
public function __construct(
private ?FederatedShareProvider $federatedShareProvider = null,
) {
if ($federatedShareProvider) {
$this->federatedShareProvider = $federatedShareProvider;
} else {
$this->federatedShareProvider = Server::get(FederatedShareProvider::class);
}
}
public function isValidSource($itemSource, $uidOwner) {
try {
$path = Filesystem::getPath($itemSource);
// FIXME: attributes should not be set here,
// keeping this pattern for now to avoid unexpected
// regressions
$this->path = Filesystem::normalizePath(basename($path));
return true;
} catch (NotFoundException $e) {
return false;
}
}
public function getFilePath($itemSource, $uidOwner) {
if (isset($this->path)) {
$path = $this->path;
$this->path = null;
return $path;
} else {
try {
$path = Filesystem::getPath($itemSource);
return $path;
} catch (NotFoundException $e) {
return false;
}
}
}
/**
* create unique target
*
* @param string $itemSource
* @param string $shareWith
* @return string
*/
public function generateTarget($itemSource, $shareWith) {
$shareFolder = Helper::getShareFolder();
$target = Filesystem::normalizePath($shareFolder . '/' . basename($itemSource));
Filesystem::initMountPoints($shareWith);
$view = new View('/' . $shareWith . '/files');
if (!$view->is_dir($shareFolder)) {
$dir = '';
$subdirs = explode('/', $shareFolder);
foreach ($subdirs as $subdir) {
$dir = $dir . '/' . $subdir;
if (!$view->is_dir($dir)) {
$view->mkdir($dir);
}
}
}
return Helper::generateUniqueTarget($target, $view);
}
public function formatItems($items, $format, $parameters = null) {
if ($format === self::FORMAT_SHARED_STORAGE) {
// Only 1 item should come through for this format call
$item = array_shift($items);
return [
'parent' => $item['parent'],
'path' => $item['path'],
'storage' => $item['storage'],
'permissions' => $item['permissions'],
'uid_owner' => $item['uid_owner'],
];
} elseif ($format === self::FORMAT_GET_FOLDER_CONTENTS) {
$files = [];
foreach ($items as $item) {
$file = [];
$file['fileid'] = $item['file_source'];
$file['storage'] = $item['storage'];
$file['path'] = $item['file_target'];
$file['parent'] = $item['file_parent'];
$file['name'] = basename($item['file_target']);
$file['mimetype'] = $item['mimetype'];
$file['mimepart'] = $item['mimepart'];
$file['mtime'] = $item['mtime'];
$file['encrypted'] = $item['encrypted'];
$file['etag'] = $item['etag'];
$file['uid_owner'] = $item['uid_owner'];
$file['displayname_owner'] = $item['displayname_owner'];
$storage = Filesystem::getStorage('/');
$cache = $storage->getCache();
$file['size'] = $item['size'];
$files[] = $file;
}
return $files;
} elseif ($format === self::FORMAT_OPENDIR) {
$files = [];
foreach ($items as $item) {
$files[] = basename($item['file_target']);
}
return $files;
} elseif ($format === self::FORMAT_GET_ALL) {
$ids = [];
foreach ($items as $item) {
$ids[] = $item['file_source'];
}
return $ids;
} elseif ($format === self::FORMAT_PERMISSIONS) {
$filePermissions = [];
foreach ($items as $item) {
$filePermissions[$item['file_source']] = $item['permissions'];
}
return $filePermissions;
} elseif ($format === self::FORMAT_TARGET_NAMES) {
$targets = [];
foreach ($items as $item) {
$targets[] = $item['file_target'];
}
return $targets;
}
return [];
}
/**
* check if server2server share is enabled
*
* @param int $shareType
* @return boolean
*/
public function isShareTypeAllowed($shareType) {
if ($shareType === IShare::TYPE_REMOTE) {
return $this->federatedShareProvider->isOutgoingServer2serverShareEnabled();
}
if ($shareType === IShare::TYPE_REMOTE_GROUP) {
return $this->federatedShareProvider->isOutgoingServer2serverGroupShareEnabled();
}
return true;
}
/**
* resolve reshares to return the correct source item
* @param array $source
* @return array source item
*/
protected static function resolveReshares($source) {
if (isset($source['parent'])) {
$parent = $source['parent'];
while (isset($parent)) {
$qb = Server::get(IDBConnection::class)->getQueryBuilder();
$qb->select('parent', 'uid_owner')
->from('share')
->where(
$qb->expr()->eq('id', $qb->createNamedParameter($parent))
);
$result = $qb->executeQuery();
$item = $result->fetch();
$result->closeCursor();
if (isset($item['parent'])) {
$parent = $item['parent'];
} else {
$fileOwner = $item['uid_owner'];
break;
}
}
} else {
$fileOwner = $source['uid_owner'];
}
if (isset($fileOwner)) {
$source['fileOwner'] = $fileOwner;
} else {
Server::get(LoggerInterface::class)->error('No owner found for reshare', ['app' => 'files_sharing']);
}
return $source;
}
/**
* @param string $target
* @param array $share
* @return array|false source item
*/
public static function getSource($target, $share) {
if ($share['item_type'] === 'folder' && $target !== '') {
// note: in case of ext storage mount points the path might be empty
// which would cause a leading slash to appear
$share['path'] = ltrim($share['path'] . '/' . $target, '/');
}
return self::resolveReshares($share);
}
}
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