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1143 lines
42 KiB
1143 lines
42 KiB
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
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* @author Bart Visscher <bartv@thisnet.nl>
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* @author Bernhard Reiter <ockham@raz.or.at>
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* @author Bjoern Schiessle <bjoern@schiessle.org>
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* @author Björn Schießle <bjoern@schiessle.org>
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Sebastian Döll <sebastian.doell@libasys.de>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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* @author Vincent Petry <pvince81@owncloud.com>
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* @author Volkan Gezer <volkangezer@gmail.com>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\Share;
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use OCP\DB\QueryBuilder\IQueryBuilder;
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use OCP\ILogger;
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use OCP\Share\IShare;
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/**
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* This class provides the ability for apps to share their content between users.
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* Apps must create a backend class that implements OCP\Share_Backend and register it with this class.
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*
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* It provides the following hooks:
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* - post_shared
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*/
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class Share extends Constants {
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/** CRUDS permissions (Create, Read, Update, Delete, Share) using a bitmask
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* Construct permissions for share() and setPermissions with Or (|) e.g.
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* Give user read and update permissions: PERMISSION_READ | PERMISSION_UPDATE
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*
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* Check if permission is granted with And (&) e.g. Check if delete is
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* granted: if ($permissions & PERMISSION_DELETE)
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*
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* Remove permissions with And (&) and Not (~) e.g. Remove the update
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* permission: $permissions &= ~PERMISSION_UPDATE
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*
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* Apps are required to handle permissions on their own, this class only
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* stores and manages the permissions of shares
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* @see lib/public/constants.php
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*/
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/**
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* Register a sharing backend class that implements OCP\Share_Backend for an item type
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* @param string $itemType Item type
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* @param string $class Backend class
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* @param string $collectionOf (optional) Depends on item type
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* @param array $supportedFileExtensions (optional) List of supported file extensions if this item type depends on files
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* @return boolean true if backend is registered or false if error
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*/
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public static function registerBackend($itemType, $class, $collectionOf = null, $supportedFileExtensions = null) {
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if (\OC::$server->getConfig()->getAppValue('core', 'shareapi_enabled', 'yes') == 'yes') {
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if (!isset(self::$backendTypes[$itemType])) {
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self::$backendTypes[$itemType] = [
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'class' => $class,
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'collectionOf' => $collectionOf,
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'supportedFileExtensions' => $supportedFileExtensions
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];
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return true;
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}
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\OCP\Util::writeLog('OCP\Share',
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'Sharing backend '.$class.' not registered, '.self::$backendTypes[$itemType]['class']
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.' is already registered for '.$itemType,
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ILogger::WARN);
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}
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return false;
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}
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/**
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* Get the items of item type shared with the current user
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* @param string $itemType
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* @param int $format (optional) Format type must be defined by the backend
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* @param mixed $parameters (optional)
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* @param int $limit Number of items to return (optional) Returns all by default
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* @param boolean $includeCollections (optional)
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* @return mixed Return depends on format
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* @deprecated TESTS ONLY - this methods is only used by tests
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* called like this:
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* \OC\Share\Share::getItemsSharedWith('folder'); (apps/files_sharing/tests/UpdaterTest.php)
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*/
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public static function getItemsSharedWith() {
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return self::getItems('folder', null, self::$shareTypeUserAndGroups, \OC_User::getUser(), null, self::FORMAT_NONE,
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null, -1, false);
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}
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/**
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* Get the items of item type shared with a user
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* @param string $itemType
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* @param string $user id for which user we want the shares
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* @param int $format (optional) Format type must be defined by the backend
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* @param mixed $parameters (optional)
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* @param int $limit Number of items to return (optional) Returns all by default
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* @param boolean $includeCollections (optional)
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* @return mixed Return depends on format
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*/
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public static function getItemsSharedWithUser($itemType, $user, $format = self::FORMAT_NONE,
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$parameters = null, $limit = -1, $includeCollections = false) {
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return self::getItems($itemType, null, self::$shareTypeUserAndGroups, $user, null, $format,
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$parameters, $limit, $includeCollections);
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}
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/**
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* Get the item of item type shared with a given user by source
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* @param string $itemType
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* @param string $itemSource
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* @param string $user User to whom the item was shared
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* @param string $owner Owner of the share
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* @param int $shareType only look for a specific share type
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* @return array Return list of items with file_target, permissions and expiration
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*/
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public static function getItemSharedWithUser($itemType, $itemSource, $user, $owner = null, $shareType = null) {
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$shares = [];
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$fileDependent = false;
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$where = 'WHERE';
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$fileDependentWhere = '';
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if ($itemType === 'file' || $itemType === 'folder') {
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$fileDependent = true;
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$column = 'file_source';
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$fileDependentWhere = 'INNER JOIN `*PREFIX*filecache` ON `file_source` = `*PREFIX*filecache`.`fileid` ';
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$fileDependentWhere .= 'INNER JOIN `*PREFIX*storages` ON `numeric_id` = `*PREFIX*filecache`.`storage` ';
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} else {
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$column = 'item_source';
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}
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$select = self::createSelectStatement(self::FORMAT_NONE, $fileDependent);
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$where .= ' `' . $column . '` = ? AND `item_type` = ? ';
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$arguments = [$itemSource, $itemType];
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// for link shares $user === null
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if ($user !== null) {
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$where .= ' AND `share_with` = ? ';
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$arguments[] = $user;
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}
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if ($shareType !== null) {
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$where .= ' AND `share_type` = ? ';
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$arguments[] = $shareType;
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}
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if ($owner !== null) {
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$where .= ' AND `uid_owner` = ? ';
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$arguments[] = $owner;
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}
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$query = \OC_DB::prepare('SELECT ' . $select . ' FROM `*PREFIX*share` '. $fileDependentWhere . $where);
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$result = \OC_DB::executeAudited($query, $arguments);
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while ($row = $result->fetchRow()) {
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if ($fileDependent && !self::isFileReachable($row['path'], $row['storage_id'])) {
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continue;
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}
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if ($fileDependent && (int)$row['file_parent'] === -1) {
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// if it is a mount point we need to get the path from the mount manager
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$mountManager = \OC\Files\Filesystem::getMountManager();
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$mountPoint = $mountManager->findByStorageId($row['storage_id']);
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if (!empty($mountPoint)) {
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$path = $mountPoint[0]->getMountPoint();
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$path = trim($path, '/');
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$path = substr($path, strlen($owner) + 1); //normalize path to 'files/foo.txt`
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$row['path'] = $path;
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} else {
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\OC::$server->getLogger()->warning(
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'Could not resolve mount point for ' . $row['storage_id'],
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['app' => 'OCP\Share']
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);
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}
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}
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$shares[] = $row;
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}
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//if didn't found a result than let's look for a group share.
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if (empty($shares) && $user !== null) {
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$userObject = \OC::$server->getUserManager()->get($user);
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$groups = [];
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if ($userObject) {
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$groups = \OC::$server->getGroupManager()->getUserGroupIds($userObject);
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}
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if (!empty($groups)) {
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$where = $fileDependentWhere . ' WHERE `' . $column . '` = ? AND `item_type` = ? AND `share_with` in (?)';
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$arguments = [$itemSource, $itemType, $groups];
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$types = [null, null, IQueryBuilder::PARAM_STR_ARRAY];
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if ($owner !== null) {
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$where .= ' AND `uid_owner` = ?';
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$arguments[] = $owner;
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$types[] = null;
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}
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// TODO: inject connection, hopefully one day in the future when this
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// class isn't static anymore...
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$conn = \OC::$server->getDatabaseConnection();
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$result = $conn->executeQuery(
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'SELECT ' . $select . ' FROM `*PREFIX*share` ' . $where,
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$arguments,
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$types
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);
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while ($row = $result->fetch()) {
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$shares[] = $row;
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}
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}
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}
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return $shares;
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}
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/**
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* Get the item of item type shared with the current user by source
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* @param string $itemType
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* @param string $itemSource
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* @param int $format (optional) Format type must be defined by the backend
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* @param mixed $parameters
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* @param boolean $includeCollections
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* @param string $shareWith (optional) define against which user should be checked, default: current user
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* @return array
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*/
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public static function getItemSharedWithBySource($itemType, $itemSource, $format = self::FORMAT_NONE,
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$parameters = null, $includeCollections = false, $shareWith = null) {
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$shareWith = ($shareWith === null) ? \OC_User::getUser() : $shareWith;
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return self::getItems($itemType, $itemSource, self::$shareTypeUserAndGroups, $shareWith, null, $format,
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$parameters, 1, $includeCollections, true);
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}
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/**
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* Get the shared item of item type owned by the current user
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* @param string $itemType
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* @param string $itemSource
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* @param int $format (optional) Format type must be defined by the backend
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* @param mixed $parameters
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* @param boolean $includeCollections
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* @return mixed Return depends on format
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*/
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public static function getItemShared($itemType, $itemSource, $format = self::FORMAT_NONE,
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$parameters = null, $includeCollections = false) {
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return self::getItems($itemType, $itemSource, null, null, \OC_User::getUser(), $format,
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$parameters, -1, $includeCollections);
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}
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/**
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* Unshare an item from a user, group, or delete a private link
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* @param string $itemType
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* @param string $itemSource
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* @param int $shareType SHARE_TYPE_USER, SHARE_TYPE_GROUP, or SHARE_TYPE_LINK
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* @param string $shareWith User or group the item is being shared with
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* @param string $owner owner of the share, if null the current user is used
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* @return boolean true on success or false on failure
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*/
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public static function unshare($itemType, $itemSource, $shareType, $shareWith, $owner = null) {
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// check if it is a valid itemType
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self::getBackend($itemType);
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$items = self::getItemSharedWithUser($itemType, $itemSource, $shareWith, $owner, $shareType);
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$toDelete = [];
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$newParent = null;
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$currentUser = $owner ? $owner : \OC_User::getUser();
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foreach ($items as $item) {
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// delete the item with the expected share_type and owner
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if ((int)$item['share_type'] === (int)$shareType && $item['uid_owner'] === $currentUser) {
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$toDelete = $item;
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// if there is more then one result we don't have to delete the children
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// but update their parent. For group shares the new parent should always be
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// the original group share and not the db entry with the unique name
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} elseif ((int)$item['share_type'] === self::$shareTypeGroupUserUnique) {
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$newParent = $item['parent'];
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} else {
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$newParent = $item['id'];
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}
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}
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if (!empty($toDelete)) {
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self::unshareItem($toDelete, $newParent);
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return true;
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}
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return false;
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}
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/**
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* Checks whether a share has expired, calls unshareItem() if yes.
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* @param array $item Share data (usually database row)
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* @return boolean True if item was expired, false otherwise.
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*/
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protected static function expireItem(array $item) {
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$result = false;
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// only use default expiration date for link shares
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if ((int) $item['share_type'] === IShare::TYPE_LINK) {
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// calculate expiration date
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if (!empty($item['expiration'])) {
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$userDefinedExpire = new \DateTime($item['expiration']);
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$expires = $userDefinedExpire->getTimestamp();
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} else {
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$expires = null;
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}
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// get default expiration settings
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$defaultSettings = Helper::getDefaultExpireSetting();
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$expires = Helper::calculateExpireDate($defaultSettings, $item['stime'], $expires);
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if (is_int($expires)) {
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$now = time();
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if ($now > $expires) {
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self::unshareItem($item);
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$result = true;
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}
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}
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}
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return $result;
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}
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/**
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* Unshares a share given a share data array
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* @param array $item Share data (usually database row)
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* @param int $newParent parent ID
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* @return null
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*/
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protected static function unshareItem(array $item, $newParent = null) {
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$shareType = (int)$item['share_type'];
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$shareWith = null;
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if ($shareType !== IShare::TYPE_LINK) {
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$shareWith = $item['share_with'];
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}
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// Pass all the vars we have for now, they may be useful
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$hookParams = [
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'id' => $item['id'],
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'itemType' => $item['item_type'],
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'itemSource' => $item['item_source'],
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'shareType' => $shareType,
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'shareWith' => $shareWith,
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'itemParent' => $item['parent'],
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'uidOwner' => $item['uid_owner'],
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];
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if ($item['item_type'] === 'file' || $item['item_type'] === 'folder') {
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$hookParams['fileSource'] = $item['file_source'];
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$hookParams['fileTarget'] = $item['file_target'];
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}
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\OC_Hook::emit(\OCP\Share::class, 'pre_unshare', $hookParams);
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$deletedShares = Helper::delete($item['id'], false, null, $newParent);
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$deletedShares[] = $hookParams;
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$hookParams['deletedShares'] = $deletedShares;
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\OC_Hook::emit(\OCP\Share::class, 'post_unshare', $hookParams);
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if ((int)$item['share_type'] === IShare::TYPE_REMOTE && \OC::$server->getUserSession()->getUser()) {
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list(, $remote) = Helper::splitUserRemote($item['share_with']);
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self::sendRemoteUnshare($remote, $item['id'], $item['token']);
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}
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}
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/**
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* Get the backend class for the specified item type
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* @param string $itemType
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* @throws \Exception
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* @return \OCP\Share_Backend
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*/
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public static function getBackend($itemType) {
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$l = \OC::$server->getL10N('lib');
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if (isset(self::$backends[$itemType])) {
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return self::$backends[$itemType];
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} elseif (isset(self::$backendTypes[$itemType]['class'])) {
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$class = self::$backendTypes[$itemType]['class'];
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if (class_exists($class)) {
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self::$backends[$itemType] = new $class;
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if (!(self::$backends[$itemType] instanceof \OCP\Share_Backend)) {
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$message = 'Sharing backend %s must implement the interface OCP\Share_Backend';
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$message_t = $l->t('Sharing backend %s must implement the interface OCP\Share_Backend', [$class]);
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\OCP\Util::writeLog('OCP\Share', sprintf($message, $class), ILogger::ERROR);
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throw new \Exception($message_t);
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}
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return self::$backends[$itemType];
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} else {
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$message = 'Sharing backend %s not found';
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$message_t = $l->t('Sharing backend %s not found', [$class]);
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\OCP\Util::writeLog('OCP\Share', sprintf($message, $class), ILogger::ERROR);
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throw new \Exception($message_t);
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}
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}
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$message = 'Sharing backend for %s not found';
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$message_t = $l->t('Sharing backend for %s not found', [$itemType]);
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\OCP\Util::writeLog('OCP\Share', sprintf($message, $itemType), ILogger::ERROR);
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throw new \Exception($message_t);
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}
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/**
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* Check if resharing is allowed
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* @return boolean true if allowed or false
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*
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* Resharing is allowed by default if not configured
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*/
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public static function isResharingAllowed() {
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if (!isset(self::$isResharingAllowed)) {
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if (\OC::$server->getConfig()->getAppValue('core', 'shareapi_allow_resharing', 'yes') == 'yes') {
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self::$isResharingAllowed = true;
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} else {
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self::$isResharingAllowed = false;
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}
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}
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return self::$isResharingAllowed;
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}
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/**
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* Get a list of collection item types for the specified item type
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* @param string $itemType
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* @return array
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*/
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private static function getCollectionItemTypes($itemType) {
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$collectionTypes = [$itemType];
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foreach (self::$backendTypes as $type => $backend) {
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if (in_array($backend['collectionOf'], $collectionTypes)) {
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$collectionTypes[] = $type;
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}
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}
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// TODO Add option for collections to be collection of themselves, only 'folder' does it now...
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if (isset(self::$backendTypes[$itemType]) && (!self::getBackend($itemType) instanceof \OCP\Share_Backend_Collection || $itemType != 'folder')) {
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unset($collectionTypes[0]);
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}
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// Return array if collections were found or the item type is a
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// collection itself - collections can be inside collections
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if (count($collectionTypes) > 0) {
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return $collectionTypes;
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}
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return false;
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}
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/**
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* Get shared items from the database
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* @param string $itemType
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* @param string $item Item source or target (optional)
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* @param int $shareType SHARE_TYPE_USER, SHARE_TYPE_GROUP, SHARE_TYPE_LINK, $shareTypeUserAndGroups, or $shareTypeGroupUserUnique
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* @param string $shareWith User or group the item is being shared with
|
|
* @param string $uidOwner User that is the owner of shared items (optional)
|
|
* @param int $format Format to convert items to with formatItems() (optional)
|
|
* @param mixed $parameters to pass to formatItems() (optional)
|
|
* @param int $limit Number of items to return, -1 to return all matches (optional)
|
|
* @param boolean $includeCollections Include collection item types (optional)
|
|
* @param boolean $itemShareWithBySource (optional)
|
|
* @param boolean $checkExpireDate
|
|
* @return array
|
|
*
|
|
* See public functions getItem(s)... for parameter usage
|
|
*
|
|
*/
|
|
public static function getItems($itemType, $item = null, $shareType = null, $shareWith = null,
|
|
$uidOwner = null, $format = self::FORMAT_NONE, $parameters = null, $limit = -1,
|
|
$includeCollections = false, $itemShareWithBySource = false, $checkExpireDate = true) {
|
|
if (\OC::$server->getConfig()->getAppValue('core', 'shareapi_enabled', 'yes') != 'yes') {
|
|
return [];
|
|
}
|
|
$backend = self::getBackend($itemType);
|
|
$collectionTypes = false;
|
|
// Get filesystem root to add it to the file target and remove from the
|
|
// file source, match file_source with the file cache
|
|
if ($itemType == 'file' || $itemType == 'folder') {
|
|
if (!is_null($uidOwner)) {
|
|
$root = \OC\Files\Filesystem::getRoot();
|
|
} else {
|
|
$root = '';
|
|
}
|
|
$where = 'INNER JOIN `*PREFIX*filecache` ON `file_source` = `*PREFIX*filecache`.`fileid` ';
|
|
if (!isset($item)) {
|
|
$where .= ' AND `file_target` IS NOT NULL ';
|
|
}
|
|
$where .= 'INNER JOIN `*PREFIX*storages` ON `numeric_id` = `*PREFIX*filecache`.`storage` ';
|
|
$fileDependent = true;
|
|
$queryArgs = [];
|
|
} else {
|
|
$fileDependent = false;
|
|
$root = '';
|
|
$collectionTypes = self::getCollectionItemTypes($itemType);
|
|
if ($includeCollections && !isset($item) && $collectionTypes) {
|
|
// If includeCollections is true, find collections of this item type, e.g. a music album contains songs
|
|
if (!in_array($itemType, $collectionTypes)) {
|
|
$itemTypes = array_merge([$itemType], $collectionTypes);
|
|
} else {
|
|
$itemTypes = $collectionTypes;
|
|
}
|
|
$placeholders = implode(',', array_fill(0, count($itemTypes), '?'));
|
|
$where = ' WHERE `item_type` IN ('.$placeholders.'))';
|
|
$queryArgs = $itemTypes;
|
|
} else {
|
|
$where = ' WHERE `item_type` = ?';
|
|
$queryArgs = [$itemType];
|
|
}
|
|
}
|
|
if (\OC::$server->getConfig()->getAppValue('core', 'shareapi_allow_links', 'yes') !== 'yes') {
|
|
$where .= ' AND `share_type` != ?';
|
|
$queryArgs[] = IShare::TYPE_LINK;
|
|
}
|
|
if (isset($shareType)) {
|
|
// Include all user and group items
|
|
if ($shareType == self::$shareTypeUserAndGroups && isset($shareWith)) {
|
|
$where .= ' AND ((`share_type` in (?, ?) AND `share_with` = ?) ';
|
|
$queryArgs[] = IShare::TYPE_USER;
|
|
$queryArgs[] = self::$shareTypeGroupUserUnique;
|
|
$queryArgs[] = $shareWith;
|
|
|
|
$user = \OC::$server->getUserManager()->get($shareWith);
|
|
$groups = [];
|
|
if ($user) {
|
|
$groups = \OC::$server->getGroupManager()->getUserGroupIds($user);
|
|
}
|
|
if (!empty($groups)) {
|
|
$placeholders = implode(',', array_fill(0, count($groups), '?'));
|
|
$where .= ' OR (`share_type` = ? AND `share_with` IN ('.$placeholders.')) ';
|
|
$queryArgs[] = IShare::TYPE_GROUP;
|
|
$queryArgs = array_merge($queryArgs, $groups);
|
|
}
|
|
$where .= ')';
|
|
// Don't include own group shares
|
|
$where .= ' AND `uid_owner` != ?';
|
|
$queryArgs[] = $shareWith;
|
|
} else {
|
|
$where .= ' AND `share_type` = ?';
|
|
$queryArgs[] = $shareType;
|
|
if (isset($shareWith)) {
|
|
$where .= ' AND `share_with` = ?';
|
|
$queryArgs[] = $shareWith;
|
|
}
|
|
}
|
|
}
|
|
if (isset($uidOwner)) {
|
|
$where .= ' AND `uid_owner` = ?';
|
|
$queryArgs[] = $uidOwner;
|
|
if (!isset($shareType)) {
|
|
// Prevent unique user targets for group shares from being selected
|
|
$where .= ' AND `share_type` != ?';
|
|
$queryArgs[] = self::$shareTypeGroupUserUnique;
|
|
}
|
|
if ($fileDependent) {
|
|
$column = 'file_source';
|
|
} else {
|
|
$column = 'item_source';
|
|
}
|
|
} else {
|
|
if ($fileDependent) {
|
|
$column = 'file_target';
|
|
} else {
|
|
$column = 'item_target';
|
|
}
|
|
}
|
|
if (isset($item)) {
|
|
$collectionTypes = self::getCollectionItemTypes($itemType);
|
|
if ($includeCollections && $collectionTypes && !in_array('folder', $collectionTypes)) {
|
|
$where .= ' AND (';
|
|
} else {
|
|
$where .= ' AND';
|
|
}
|
|
// If looking for own shared items, check item_source else check item_target
|
|
if (isset($uidOwner) || $itemShareWithBySource) {
|
|
// If item type is a file, file source needs to be checked in case the item was converted
|
|
if ($fileDependent) {
|
|
$where .= ' `file_source` = ?';
|
|
$column = 'file_source';
|
|
} else {
|
|
$where .= ' `item_source` = ?';
|
|
$column = 'item_source';
|
|
}
|
|
} else {
|
|
if ($fileDependent) {
|
|
$where .= ' `file_target` = ?';
|
|
$item = \OC\Files\Filesystem::normalizePath($item);
|
|
} else {
|
|
$where .= ' `item_target` = ?';
|
|
}
|
|
}
|
|
$queryArgs[] = $item;
|
|
if ($includeCollections && $collectionTypes && !in_array('folder', $collectionTypes)) {
|
|
$placeholders = implode(',', array_fill(0, count($collectionTypes), '?'));
|
|
$where .= ' OR `item_type` IN ('.$placeholders.'))';
|
|
$queryArgs = array_merge($queryArgs, $collectionTypes);
|
|
}
|
|
}
|
|
|
|
if ($shareType == self::$shareTypeUserAndGroups && $limit === 1) {
|
|
// Make sure the unique user target is returned if it exists,
|
|
// unique targets should follow the group share in the database
|
|
// If the limit is not 1, the filtering can be done later
|
|
$where .= ' ORDER BY `*PREFIX*share`.`id` DESC';
|
|
} else {
|
|
$where .= ' ORDER BY `*PREFIX*share`.`id` ASC';
|
|
}
|
|
|
|
if ($limit != -1 && !$includeCollections) {
|
|
// The limit must be at least 3, because filtering needs to be done
|
|
if ($limit < 3) {
|
|
$queryLimit = 3;
|
|
} else {
|
|
$queryLimit = $limit;
|
|
}
|
|
} else {
|
|
$queryLimit = null;
|
|
}
|
|
$select = self::createSelectStatement($format, $fileDependent, $uidOwner);
|
|
$root = strlen($root);
|
|
$query = \OC_DB::prepare('SELECT '.$select.' FROM `*PREFIX*share` '.$where, $queryLimit);
|
|
$result = $query->execute($queryArgs);
|
|
if ($result === false) {
|
|
\OCP\Util::writeLog('OCP\Share',
|
|
\OC_DB::getErrorMessage() . ', select=' . $select . ' where=',
|
|
ILogger::ERROR);
|
|
}
|
|
$items = [];
|
|
$targets = [];
|
|
$switchedItems = [];
|
|
$mounts = [];
|
|
while ($row = $result->fetchRow()) {
|
|
self::transformDBResults($row);
|
|
// Filter out duplicate group shares for users with unique targets
|
|
if ($fileDependent && !self::isFileReachable($row['path'], $row['storage_id'])) {
|
|
continue;
|
|
}
|
|
if ($row['share_type'] == self::$shareTypeGroupUserUnique && isset($items[$row['parent']])) {
|
|
$row['share_type'] = IShare::TYPE_GROUP;
|
|
$row['unique_name'] = true; // remember that we use a unique name for this user
|
|
$row['share_with'] = $items[$row['parent']]['share_with'];
|
|
// if the group share was unshared from the user we keep the permission, otherwise
|
|
// we take the permission from the parent because this is always the up-to-date
|
|
// permission for the group share
|
|
if ($row['permissions'] > 0) {
|
|
$row['permissions'] = $items[$row['parent']]['permissions'];
|
|
}
|
|
// Remove the parent group share
|
|
unset($items[$row['parent']]);
|
|
if ($row['permissions'] == 0) {
|
|
continue;
|
|
}
|
|
} elseif (!isset($uidOwner)) {
|
|
// Check if the same target already exists
|
|
if (isset($targets[$row['id']])) {
|
|
// Check if the same owner shared with the user twice
|
|
// through a group and user share - this is allowed
|
|
$id = $targets[$row['id']];
|
|
if (isset($items[$id]) && $items[$id]['uid_owner'] == $row['uid_owner']) {
|
|
// Switch to group share type to ensure resharing conditions aren't bypassed
|
|
if ($items[$id]['share_type'] != IShare::TYPE_GROUP) {
|
|
$items[$id]['share_type'] = IShare::TYPE_GROUP;
|
|
$items[$id]['share_with'] = $row['share_with'];
|
|
}
|
|
// Switch ids if sharing permission is granted on only
|
|
// one share to ensure correct parent is used if resharing
|
|
if (~(int)$items[$id]['permissions'] & \OCP\Constants::PERMISSION_SHARE
|
|
&& (int)$row['permissions'] & \OCP\Constants::PERMISSION_SHARE) {
|
|
$items[$row['id']] = $items[$id];
|
|
$switchedItems[$id] = $row['id'];
|
|
unset($items[$id]);
|
|
$id = $row['id'];
|
|
}
|
|
$items[$id]['permissions'] |= (int)$row['permissions'];
|
|
}
|
|
continue;
|
|
} elseif (!empty($row['parent'])) {
|
|
$targets[$row['parent']] = $row['id'];
|
|
}
|
|
}
|
|
// Remove root from file source paths if retrieving own shared items
|
|
if (isset($uidOwner) && isset($row['path'])) {
|
|
if (isset($row['parent'])) {
|
|
$query = \OC_DB::prepare('SELECT `file_target` FROM `*PREFIX*share` WHERE `id` = ?');
|
|
$parentResult = $query->execute([$row['parent']]);
|
|
if ($result === false) {
|
|
\OCP\Util::writeLog('OCP\Share', 'Can\'t select parent: ' .
|
|
\OC_DB::getErrorMessage() . ', select=' . $select . ' where=' . $where,
|
|
ILogger::ERROR);
|
|
} else {
|
|
$parentRow = $parentResult->fetchRow();
|
|
$tmpPath = $parentRow['file_target'];
|
|
// find the right position where the row path continues from the target path
|
|
$pos = strrpos($row['path'], $parentRow['file_target']);
|
|
$subPath = substr($row['path'], $pos);
|
|
$splitPath = explode('/', $subPath);
|
|
foreach (array_slice($splitPath, 2) as $pathPart) {
|
|
$tmpPath = $tmpPath . '/' . $pathPart;
|
|
}
|
|
$row['path'] = $tmpPath;
|
|
}
|
|
} else {
|
|
if (!isset($mounts[$row['storage']])) {
|
|
$mountPoints = \OC\Files\Filesystem::getMountByNumericId($row['storage']);
|
|
if (is_array($mountPoints) && !empty($mountPoints)) {
|
|
$mounts[$row['storage']] = current($mountPoints);
|
|
}
|
|
}
|
|
if (!empty($mounts[$row['storage']])) {
|
|
$path = $mounts[$row['storage']]->getMountPoint().$row['path'];
|
|
$relPath = substr($path, $root); // path relative to data/user
|
|
$row['path'] = rtrim($relPath, '/');
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($checkExpireDate) {
|
|
if (self::expireItem($row)) {
|
|
continue;
|
|
}
|
|
}
|
|
// Check if resharing is allowed, if not remove share permission
|
|
if (isset($row['permissions']) && (!self::isResharingAllowed() | \OCP\Util::isSharingDisabledForUser())) {
|
|
$row['permissions'] &= ~\OCP\Constants::PERMISSION_SHARE;
|
|
}
|
|
// Add display names to result
|
|
$row['share_with_displayname'] = $row['share_with'];
|
|
if (isset($row['share_with']) && $row['share_with'] != '' &&
|
|
$row['share_type'] === IShare::TYPE_USER) {
|
|
$shareWithUser = \OC::$server->getUserManager()->get($row['share_with']);
|
|
$row['share_with_displayname'] = $shareWithUser === null ? $row['share_with'] : $shareWithUser->getDisplayName();
|
|
} elseif (isset($row['share_with']) && $row['share_with'] != '' &&
|
|
$row['share_type'] === IShare::TYPE_REMOTE) {
|
|
$addressBookEntries = \OC::$server->getContactsManager()->search($row['share_with'], ['CLOUD']);
|
|
foreach ($addressBookEntries as $entry) {
|
|
foreach ($entry['CLOUD'] as $cloudID) {
|
|
if ($cloudID === $row['share_with']) {
|
|
$row['share_with_displayname'] = $entry['FN'];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (isset($row['uid_owner']) && $row['uid_owner'] != '') {
|
|
$ownerUser = \OC::$server->getUserManager()->get($row['uid_owner']);
|
|
$row['displayname_owner'] = $ownerUser === null ? $row['uid_owner'] : $ownerUser->getDisplayName();
|
|
}
|
|
|
|
if ($row['permissions'] > 0) {
|
|
$items[$row['id']] = $row;
|
|
}
|
|
}
|
|
|
|
// group items if we are looking for items shared with the current user
|
|
if (isset($shareWith) && $shareWith === \OCP\User::getUser()) {
|
|
$items = self::groupItems($items, $itemType);
|
|
}
|
|
|
|
if (!empty($items)) {
|
|
$collectionItems = [];
|
|
foreach ($items as &$row) {
|
|
// Return only the item instead of a 2-dimensional array
|
|
if ($limit == 1 && $row[$column] == $item && ($row['item_type'] == $itemType || $itemType == 'file')) {
|
|
if ($format == self::FORMAT_NONE) {
|
|
return $row;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
// Check if this is a collection of the requested item type
|
|
if ($includeCollections && $collectionTypes && $row['item_type'] !== 'folder' && in_array($row['item_type'], $collectionTypes)) {
|
|
if (($collectionBackend = self::getBackend($row['item_type']))
|
|
&& $collectionBackend instanceof \OCP\Share_Backend_Collection) {
|
|
// Collections can be inside collections, check if the item is a collection
|
|
if (isset($item) && $row['item_type'] == $itemType && $row[$column] == $item) {
|
|
$collectionItems[] = $row;
|
|
} else {
|
|
$collection = [];
|
|
$collection['item_type'] = $row['item_type'];
|
|
if ($row['item_type'] == 'file' || $row['item_type'] == 'folder') {
|
|
$collection['path'] = basename($row['path']);
|
|
}
|
|
$row['collection'] = $collection;
|
|
// Fetch all of the children sources
|
|
$children = $collectionBackend->getChildren($row[$column]);
|
|
foreach ($children as $child) {
|
|
$childItem = $row;
|
|
$childItem['item_type'] = $itemType;
|
|
if ($row['item_type'] != 'file' && $row['item_type'] != 'folder') {
|
|
$childItem['item_source'] = $child['source'];
|
|
$childItem['item_target'] = $child['target'];
|
|
}
|
|
if ($backend instanceof \OCP\Share_Backend_File_Dependent) {
|
|
if ($row['item_type'] == 'file' || $row['item_type'] == 'folder') {
|
|
$childItem['file_source'] = $child['source'];
|
|
} else { // TODO is this really needed if we already know that we use the file backend?
|
|
$meta = \OC\Files\Filesystem::getFileInfo($child['file_path']);
|
|
$childItem['file_source'] = $meta['fileid'];
|
|
}
|
|
$childItem['file_target'] =
|
|
\OC\Files\Filesystem::normalizePath($child['file_path']);
|
|
}
|
|
if (isset($item)) {
|
|
if ($childItem[$column] == $item) {
|
|
// Return only the item instead of a 2-dimensional array
|
|
if ($limit == 1) {
|
|
if ($format == self::FORMAT_NONE) {
|
|
return $childItem;
|
|
} else {
|
|
// Unset the items array and break out of both loops
|
|
$items = [];
|
|
$items[] = $childItem;
|
|
break 2;
|
|
}
|
|
} else {
|
|
$collectionItems[] = $childItem;
|
|
}
|
|
}
|
|
} else {
|
|
$collectionItems[] = $childItem;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Remove collection item
|
|
$toRemove = $row['id'];
|
|
if (array_key_exists($toRemove, $switchedItems)) {
|
|
$toRemove = $switchedItems[$toRemove];
|
|
}
|
|
unset($items[$toRemove]);
|
|
} elseif ($includeCollections && $collectionTypes && in_array($row['item_type'], $collectionTypes)) {
|
|
// FIXME: Thats a dirty hack to improve file sharing performance,
|
|
// see github issue #10588 for more details
|
|
// Need to find a solution which works for all back-ends
|
|
$collectionBackend = self::getBackend($row['item_type']);
|
|
$sharedParents = $collectionBackend->getParents($row['item_source']);
|
|
foreach ($sharedParents as $parent) {
|
|
$collectionItems[] = $parent;
|
|
}
|
|
}
|
|
}
|
|
if (!empty($collectionItems)) {
|
|
$collectionItems = array_unique($collectionItems, SORT_REGULAR);
|
|
$items = array_merge($items, $collectionItems);
|
|
}
|
|
|
|
// filter out invalid items, these can appear when subshare entries exist
|
|
// for a group in which the requested user isn't a member any more
|
|
$items = array_filter($items, function ($item) {
|
|
return $item['share_type'] !== self::$shareTypeGroupUserUnique;
|
|
});
|
|
|
|
return self::formatResult($items, $column, $backend, $format, $parameters);
|
|
} elseif ($includeCollections && $collectionTypes && in_array('folder', $collectionTypes)) {
|
|
// FIXME: Thats a dirty hack to improve file sharing performance,
|
|
// see github issue #10588 for more details
|
|
// Need to find a solution which works for all back-ends
|
|
$collectionItems = [];
|
|
$collectionBackend = self::getBackend('folder');
|
|
$sharedParents = $collectionBackend->getParents($item, $shareWith, $uidOwner);
|
|
foreach ($sharedParents as $parent) {
|
|
$collectionItems[] = $parent;
|
|
}
|
|
if ($limit === 1) {
|
|
return reset($collectionItems);
|
|
}
|
|
return self::formatResult($collectionItems, $column, $backend, $format, $parameters);
|
|
}
|
|
|
|
return [];
|
|
}
|
|
|
|
/**
|
|
* group items with link to the same source
|
|
*
|
|
* @param array $items
|
|
* @param string $itemType
|
|
* @return array of grouped items
|
|
*/
|
|
protected static function groupItems($items, $itemType) {
|
|
$fileSharing = $itemType === 'file' || $itemType === 'folder';
|
|
|
|
$result = [];
|
|
|
|
foreach ($items as $item) {
|
|
$grouped = false;
|
|
foreach ($result as $key => $r) {
|
|
// for file/folder shares we need to compare file_source, otherwise we compare item_source
|
|
// only group shares if they already point to the same target, otherwise the file where shared
|
|
// before grouping of shares was added. In this case we don't group them toi avoid confusions
|
|
if (($fileSharing && $item['file_source'] === $r['file_source'] && $item['file_target'] === $r['file_target']) ||
|
|
(!$fileSharing && $item['item_source'] === $r['item_source'] && $item['item_target'] === $r['item_target'])) {
|
|
// add the first item to the list of grouped shares
|
|
if (!isset($result[$key]['grouped'])) {
|
|
$result[$key]['grouped'][] = $result[$key];
|
|
}
|
|
$result[$key]['permissions'] = (int) $item['permissions'] | (int) $r['permissions'];
|
|
$result[$key]['grouped'][] = $item;
|
|
$grouped = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!$grouped) {
|
|
$result[] = $item;
|
|
}
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* construct select statement
|
|
* @param int $format
|
|
* @param boolean $fileDependent ist it a file/folder share or a generla share
|
|
* @param string $uidOwner
|
|
* @return string select statement
|
|
*/
|
|
private static function createSelectStatement($format, $fileDependent, $uidOwner = null) {
|
|
$select = '*';
|
|
if ($format == self::FORMAT_STATUSES) {
|
|
if ($fileDependent) {
|
|
$select = '`*PREFIX*share`.`id`, `*PREFIX*share`.`parent`, `share_type`, `path`, `storage`, '
|
|
. '`share_with`, `uid_owner` , `file_source`, `stime`, `*PREFIX*share`.`permissions`, '
|
|
. '`*PREFIX*storages`.`id` AS `storage_id`, `*PREFIX*filecache`.`parent` as `file_parent`, '
|
|
. '`uid_initiator`';
|
|
} else {
|
|
$select = '`id`, `parent`, `share_type`, `share_with`, `uid_owner`, `item_source`, `stime`, `*PREFIX*share`.`permissions`';
|
|
}
|
|
} else {
|
|
if (isset($uidOwner)) {
|
|
if ($fileDependent) {
|
|
$select = '`*PREFIX*share`.`id`, `item_type`, `item_source`, `*PREFIX*share`.`parent`,'
|
|
. ' `share_type`, `share_with`, `file_source`, `file_target`, `path`, `*PREFIX*share`.`permissions`, `stime`,'
|
|
. ' `expiration`, `token`, `storage`, `mail_send`, `uid_owner`, '
|
|
. '`*PREFIX*storages`.`id` AS `storage_id`, `*PREFIX*filecache`.`parent` as `file_parent`';
|
|
} else {
|
|
$select = '`id`, `item_type`, `item_source`, `parent`, `share_type`, `share_with`, `*PREFIX*share`.`permissions`,'
|
|
. ' `stime`, `file_source`, `expiration`, `token`, `mail_send`, `uid_owner`';
|
|
}
|
|
} else {
|
|
if ($fileDependent) {
|
|
if ($format == \OCA\Files_Sharing\ShareBackend\File::FORMAT_GET_FOLDER_CONTENTS || $format == \OCA\Files_Sharing\ShareBackend\File::FORMAT_FILE_APP_ROOT) {
|
|
$select = '`*PREFIX*share`.`id`, `item_type`, `item_source`, `*PREFIX*share`.`parent`, `uid_owner`, '
|
|
. '`share_type`, `share_with`, `file_source`, `path`, `file_target`, `stime`, '
|
|
. '`*PREFIX*share`.`permissions`, `expiration`, `storage`, `*PREFIX*filecache`.`parent` as `file_parent`, '
|
|
. '`name`, `mtime`, `mimetype`, `mimepart`, `size`, `encrypted`, `etag`, `mail_send`';
|
|
} else {
|
|
$select = '`*PREFIX*share`.`id`, `item_type`, `item_source`, `item_target`,'
|
|
. '`*PREFIX*share`.`parent`, `share_type`, `share_with`, `uid_owner`,'
|
|
. '`file_source`, `path`, `file_target`, `*PREFIX*share`.`permissions`,'
|
|
. '`stime`, `expiration`, `token`, `storage`, `mail_send`,'
|
|
. '`*PREFIX*storages`.`id` AS `storage_id`, `*PREFIX*filecache`.`parent` as `file_parent`';
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return $select;
|
|
}
|
|
|
|
|
|
/**
|
|
* transform db results
|
|
* @param array $row result
|
|
*/
|
|
private static function transformDBResults(&$row) {
|
|
if (isset($row['id'])) {
|
|
$row['id'] = (int) $row['id'];
|
|
}
|
|
if (isset($row['share_type'])) {
|
|
$row['share_type'] = (int) $row['share_type'];
|
|
}
|
|
if (isset($row['parent'])) {
|
|
$row['parent'] = (int) $row['parent'];
|
|
}
|
|
if (isset($row['file_parent'])) {
|
|
$row['file_parent'] = (int) $row['file_parent'];
|
|
}
|
|
if (isset($row['file_source'])) {
|
|
$row['file_source'] = (int) $row['file_source'];
|
|
}
|
|
if (isset($row['permissions'])) {
|
|
$row['permissions'] = (int) $row['permissions'];
|
|
}
|
|
if (isset($row['storage'])) {
|
|
$row['storage'] = (int) $row['storage'];
|
|
}
|
|
if (isset($row['stime'])) {
|
|
$row['stime'] = (int) $row['stime'];
|
|
}
|
|
if (isset($row['expiration']) && $row['share_type'] !== IShare::TYPE_LINK) {
|
|
// discard expiration date for non-link shares, which might have been
|
|
// set by ancient bugs
|
|
$row['expiration'] = null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* format result
|
|
* @param array $items result
|
|
* @param string $column is it a file share or a general share ('file_target' or 'item_target')
|
|
* @param \OCP\Share_Backend $backend sharing backend
|
|
* @param int $format
|
|
* @param array $parameters additional format parameters
|
|
* @return array format result
|
|
*/
|
|
private static function formatResult($items, $column, $backend, $format = self::FORMAT_NONE , $parameters = null) {
|
|
if ($format === self::FORMAT_NONE) {
|
|
return $items;
|
|
} elseif ($format === self::FORMAT_STATUSES) {
|
|
$statuses = [];
|
|
foreach ($items as $item) {
|
|
if ($item['share_type'] === IShare::TYPE_LINK) {
|
|
if ($item['uid_initiator'] !== \OC::$server->getUserSession()->getUser()->getUID()) {
|
|
continue;
|
|
}
|
|
$statuses[$item[$column]]['link'] = true;
|
|
} elseif (!isset($statuses[$item[$column]])) {
|
|
$statuses[$item[$column]]['link'] = false;
|
|
}
|
|
if (!empty($item['file_target'])) {
|
|
$statuses[$item[$column]]['path'] = $item['path'];
|
|
}
|
|
}
|
|
return $statuses;
|
|
} else {
|
|
return $backend->formatItems($items, $format, $parameters);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* remove protocol from URL
|
|
*
|
|
* @param string $url
|
|
* @return string
|
|
*/
|
|
public static function removeProtocolFromUrl($url) {
|
|
if (strpos($url, 'https://') === 0) {
|
|
return substr($url, strlen('https://'));
|
|
} elseif (strpos($url, 'http://') === 0) {
|
|
return substr($url, strlen('http://'));
|
|
}
|
|
|
|
return $url;
|
|
}
|
|
|
|
/**
|
|
* try http post first with https and then with http as a fallback
|
|
*
|
|
* @param string $remoteDomain
|
|
* @param string $urlSuffix
|
|
* @param array $fields post parameters
|
|
* @return array
|
|
*/
|
|
private static function tryHttpPostToShareEndpoint($remoteDomain, $urlSuffix, array $fields) {
|
|
$protocol = 'https://';
|
|
$result = [
|
|
'success' => false,
|
|
'result' => '',
|
|
];
|
|
$try = 0;
|
|
$discoveryService = \OC::$server->query(\OCP\OCS\IDiscoveryService::class);
|
|
while ($result['success'] === false && $try < 2) {
|
|
$federationEndpoints = $discoveryService->discover($protocol . $remoteDomain, 'FEDERATED_SHARING');
|
|
$endpoint = isset($federationEndpoints['share']) ? $federationEndpoints['share'] : '/ocs/v2.php/cloud/shares';
|
|
$client = \OC::$server->getHTTPClientService()->newClient();
|
|
|
|
try {
|
|
$response = $client->post(
|
|
$protocol . $remoteDomain . $endpoint . $urlSuffix . '?format=' . self::RESPONSE_FORMAT,
|
|
[
|
|
'body' => $fields,
|
|
'connect_timeout' => 10,
|
|
]
|
|
);
|
|
|
|
$result = ['success' => true, 'result' => $response->getBody()];
|
|
} catch (\Exception $e) {
|
|
$result = ['success' => false, 'result' => $e->getMessage()];
|
|
}
|
|
|
|
$try++;
|
|
$protocol = 'http://';
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* send server-to-server unshare to remote server
|
|
*
|
|
* @param string $remote url
|
|
* @param int $id share id
|
|
* @param string $token
|
|
* @return bool
|
|
*/
|
|
private static function sendRemoteUnshare($remote, $id, $token) {
|
|
$url = rtrim($remote, '/');
|
|
$fields = ['token' => $token, 'format' => 'json'];
|
|
$url = self::removeProtocolFromUrl($url);
|
|
$result = self::tryHttpPostToShareEndpoint($url, '/'.$id.'/unshare', $fields);
|
|
$status = json_decode($result['result'], true);
|
|
|
|
return ($result['success'] && ($status['ocs']['meta']['statuscode'] === 100 || $status['ocs']['meta']['statuscode'] === 200));
|
|
}
|
|
|
|
/**
|
|
* @return int
|
|
*/
|
|
public static function getExpireInterval() {
|
|
return (int)\OC::$server->getConfig()->getAppValue('core', 'shareapi_expire_after_n_days', '7');
|
|
}
|
|
|
|
/**
|
|
* Checks whether the given path is reachable for the given owner
|
|
*
|
|
* @param string $path path relative to files
|
|
* @param string $ownerStorageId storage id of the owner
|
|
*
|
|
* @return boolean true if file is reachable, false otherwise
|
|
*/
|
|
private static function isFileReachable($path, $ownerStorageId) {
|
|
// if outside the home storage, file is always considered reachable
|
|
if (!(substr($ownerStorageId, 0, 6) === 'home::' ||
|
|
substr($ownerStorageId, 0, 13) === 'object::user:'
|
|
)) {
|
|
return true;
|
|
}
|
|
|
|
// if inside the home storage, the file has to be under "/files/"
|
|
$path = ltrim($path, '/');
|
|
if (substr($path, 0, 6) === 'files/') {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
}
|