nextcloud/apps/files_sharing/lib/share/file.php

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<?php
/**
* ownCloud
*
* @author Bjoern Schiessle, Michael Gapczynski
* @copyright 2012 Michael Gapczynski <mtgap@owncloud.com>
* 2014 Bjoern Schiessle <schiessle@owncloud.com>
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*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 library. If not, see <http://www.gnu.org/licenses/>.
*/
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class OC_Share_Backend_File implements OCP\Share_Backend_File_Dependent {
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const FORMAT_SHARED_STORAGE = 0;
const FORMAT_GET_FOLDER_CONTENTS = 1;
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const FORMAT_FILE_APP_ROOT = 2;
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const FORMAT_OPENDIR = 3;
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const FORMAT_GET_ALL = 4;
const FORMAT_PERMISSIONS = 5;
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const FORMAT_TARGET_NAMES = 6;
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private $path;
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public function isValidSource($itemSource, $uidOwner) {
$path = \OC\Files\Filesystem::getPath($itemSource);
if ($path) {
// FIXME: attributes should not be set here,
// keeping this pattern for now to avoid unexpected
// regressions
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$this->path = \OC\Files\Filesystem::normalizePath(basename($path));
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return true;
}
return false;
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}
public function getFilePath($itemSource, $uidOwner) {
if (isset($this->path)) {
$path = $this->path;
$this->path = null;
return $path;
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} else {
$path = \OC\Files\Filesystem::getPath($itemSource);
if ($path) {
return $path;
}
}
return false;
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}
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/**
* create unique target
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* @param string $filePath
* @param string $shareWith
* @param array $exclude (optional)
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* @return string
*/
public function generateTarget($filePath, $shareWith, $exclude = null) {
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$shareFolder = \OCA\Files_Sharing\Helper::getShareFolder();
$target = \OC\Files\Filesystem::normalizePath($shareFolder . '/' . basename($filePath));
// for group shares we return the target right away
if ($shareWith === false) {
return $target;
}
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\OC\Files\Filesystem::initMountPoints($shareWith);
$view = new \OC\Files\View('/' . $shareWith . '/files');
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if (!$view->is_dir($shareFolder)) {
$dir = '';
$subdirs = explode('/', $shareFolder);
foreach ($subdirs as $subdir) {
$dir = $dir . '/' . $subdir;
if (!$view->is_dir($dir)) {
$view->mkdir($dir);
}
}
}
$excludeList = (is_array($exclude)) ? $exclude : array();
return \OCA\Files_Sharing\Helper::generateUniqueTarget($target, $excludeList, $view);
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}
public function formatItems($items, $format, $parameters = null) {
if ($format == self::FORMAT_SHARED_STORAGE) {
// Only 1 item should come through for this format call
$item = array_shift($items);
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return array(
'parent' => $item['parent'],
'path' => $item['path'],
'storage' => $item['storage'],
'permissions' => $item['permissions'],
'uid_owner' => $item['uid_owner'],
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);
} else if ($format == self::FORMAT_GET_FOLDER_CONTENTS) {
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$files = array();
foreach ($items as $item) {
$file = array();
$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'] = $item['mimetype'];
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$file['mimepart'] = $item['mimepart'];
$file['mtime'] = $item['mtime'];
$file['encrypted'] = $item['encrypted'];
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$file['etag'] = $item['etag'];
$file['uid_owner'] = $item['uid_owner'];
$file['displayname_owner'] = $item['displayname_owner'];
$storage = \OC\Files\Filesystem::getStorage('/');
$cache = $storage->getCache();
if ($item['encrypted'] or ($item['unencrypted_size'] > 0 and $cache->getMimetype($item['mimetype']) === 'httpd/unix-directory')) {
$file['size'] = $item['unencrypted_size'];
$file['encrypted_size'] = $item['size'];
} else {
$file['size'] = $item['size'];
}
$files[] = $file;
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}
return $files;
} else if ($format == self::FORMAT_OPENDIR) {
$files = array();
foreach ($items as $item) {
$files[] = basename($item['file_target']);
}
return $files;
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} else if ($format == self::FORMAT_GET_ALL) {
$ids = array();
foreach ($items as $item) {
$ids[] = $item['file_source'];
}
return $ids;
} else if ($format === self::FORMAT_PERMISSIONS) {
$filePermissions = array();
foreach ($items as $item) {
$filePermissions[$item['file_source']] = $item['permissions'];
}
return $filePermissions;
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} else if ($format === self::FORMAT_TARGET_NAMES) {
$targets = array();
foreach ($items as $item) {
$targets[] = $item['file_target'];
}
return $targets;
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}
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return array();
}
/**
* check if server2server share is enabled
*
* @param int $shareType
* @return boolean
*/
public function isShareTypeAllowed($shareType) {
if ($shareType === \OCP\Share::SHARE_TYPE_REMOTE) {
return \OCA\Files_Sharing\Helper::isOutgoingServer2serverShareEnabled();
}
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)) {
$query = \OC_DB::prepare('SELECT `parent`, `uid_owner` FROM `*PREFIX*share` WHERE `id` = ?', 1);
$item = $query->execute(array($parent))->fetchRow();
if (isset($item['parent'])) {
$parent = $item['parent'];
} else {
$fileOwner = $item['uid_owner'];
break;
}
}
} else {
$fileOwner = $source['uid_owner'];
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}
if (isset($fileOwner)) {
$source['fileOwner'] = $fileOwner;
} else {
\OCP\Util::writeLog('files_sharing', "No owner found for reshare", \OCP\Util::ERROR);
}
return $source;
}
/**
* @param string $target
* @param string $mountPoint
* @param string $itemType
* @return array|false source item
*/
public static function getSource($target, $mountPoint, $itemType) {
if ($itemType === 'folder') {
$source = \OCP\Share::getItemSharedWith('folder', $mountPoint, \OC_Share_Backend_File::FORMAT_SHARED_STORAGE);
if ($source && $target !== '') {
// note: in case of ext storage mount points the path might be empty
// which would cause a leading slash to appear
$source['path'] = ltrim($source['path'] . '/' . $target, '/');
}
} else {
$source = \OCP\Share::getItemSharedWith('file', $mountPoint, \OC_Share_Backend_File::FORMAT_SHARED_STORAGE);
}
if ($source) {
return self::resolveReshares($source);
}
\OCP\Util::writeLog('files_sharing', 'File source not found for: '.$target, \OCP\Util::DEBUG);
return false;
}
}