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- <?php
- /**
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- *
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Björn Schießle <bjoern@schiessle.org>
- * @author Joas Schilling <coding@schilljs.com>
- * @author Lukas Reschke <lukas@statuscode.ch>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <robin@icewind.nl>
- * @author Roeland Jago Douma <roeland@famdouma.nl>
- * @author Vincent Petry <pvince81@owncloud.com>
- *
- * @license AGPL-3.0
- *
- * This code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * 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, version 3,
- * along with this program. If not, see <http://www.gnu.org/licenses/>
- *
- */
- namespace OCA\Files_Sharing;
-
- use OC\Files\Filesystem;
- use OC\Files\View;
- use OCP\Files\NotFoundException;
- use OCP\Share\Exceptions\ShareNotFound;
- use OCP\User;
-
- class Helper {
-
- public static function registerHooks() {
- \OCP\Util::connectHook('OC_Filesystem', 'post_rename', '\OCA\Files_Sharing\Updater', 'renameHook');
- \OCP\Util::connectHook('OC_Filesystem', 'post_delete', '\OCA\Files_Sharing\Hooks', 'unshareChildren');
-
- \OCP\Util::connectHook('OC_User', 'post_deleteUser', '\OCA\Files_Sharing\Hooks', 'deleteUser');
- }
-
- /**
- * Sets up the filesystem and user for public sharing
- * @param string $token string share token
- * @param string $relativePath optional path relative to the share
- * @param string $password optional password
- * @return array
- */
- public static function setupFromToken($token, $relativePath = null, $password = null) {
- \OC_User::setIncognitoMode(true);
-
- $shareManager = \OC::$server->getShareManager();
-
- try {
- $share = $shareManager->getShareByToken($token);
- } catch (ShareNotFound $e) {
- \OC_Response::setStatus(404);
- \OCP\Util::writeLog('core-preview', 'Passed token parameter is not valid', \OCP\Util::DEBUG);
- exit;
- }
-
- \OCP\JSON::checkUserExists($share->getShareOwner());
- \OC_Util::tearDownFS();
- \OC_Util::setupFS($share->getShareOwner());
-
-
- try {
- $path = Filesystem::getPath($share->getNodeId());
- } catch (NotFoundException $e) {
- \OCP\Util::writeLog('share', 'could not resolve linkItem', \OCP\Util::DEBUG);
- \OC_Response::setStatus(404);
- \OCP\JSON::error(array('success' => false));
- exit();
- }
-
- if ($share->getShareType() === \OCP\Share::SHARE_TYPE_LINK && $share->getPassword() !== null) {
- if (!self::authenticate($share, $password)) {
- \OC_Response::setStatus(403);
- \OCP\JSON::error(array('success' => false));
- exit();
- }
- }
-
- $basePath = $path;
-
- if ($relativePath !== null && Filesystem::isReadable($basePath . $relativePath)) {
- $path .= Filesystem::normalizePath($relativePath);
- }
-
- return array(
- 'share' => $share,
- 'basePath' => $basePath,
- 'realPath' => $path
- );
- }
-
- /**
- * Authenticate link item with the given password
- * or with the session if no password was given.
- * @param \OCP\Share\IShare $share
- * @param string $password optional password
- *
- * @return boolean true if authorized, false otherwise
- */
- public static function authenticate($share, $password = null) {
- $shareManager = \OC::$server->getShareManager();
-
- if ($password !== null) {
- if ($share->getShareType() === \OCP\Share::SHARE_TYPE_LINK) {
- if ($shareManager->checkPassword($share, $password)) {
- \OC::$server->getSession()->set('public_link_authenticated', (string)$share->getId());
- return true;
- }
- }
- } else {
- // not authenticated ?
- if (\OC::$server->getSession()->exists('public_link_authenticated')
- && \OC::$server->getSession()->get('public_link_authenticated') !== (string)$share->getId()) {
- return true;
- }
- }
- return false;
- }
-
- public static function getSharesFromItem($target) {
- $result = array();
- $owner = Filesystem::getOwner($target);
- Filesystem::initMountPoints($owner);
- $info = Filesystem::getFileInfo($target);
- $ownerView = new View('/'.$owner.'/files');
- if ( $owner !== User::getUser() ) {
- $path = $ownerView->getPath($info['fileid']);
- } else {
- $path = $target;
- }
-
-
- $ids = array();
- while ($path !== dirname($path)) {
- $info = $ownerView->getFileInfo($path);
- if ($info instanceof \OC\Files\FileInfo) {
- $ids[] = $info['fileid'];
- } else {
- \OCP\Util::writeLog('sharing', 'No fileinfo available for: ' . $path, \OCP\Util::WARN);
- }
- $path = dirname($path);
- }
-
- if (!empty($ids)) {
-
- $idList = array_chunk($ids, 99, true);
-
- foreach ($idList as $subList) {
- $statement = "SELECT `share_with`, `share_type`, `file_target` FROM `*PREFIX*share` WHERE `file_source` IN (" . implode(',', $subList) . ") AND `share_type` IN (0, 1, 2)";
- $query = \OCP\DB::prepare($statement);
- $r = $query->execute();
- $result = array_merge($result, $r->fetchAll());
- }
- }
-
- return $result;
- }
-
- /**
- * get the UID of the owner of the file and the path to the file relative to
- * owners files folder
- *
- * @param $filename
- * @return array
- * @throws \OC\User\NoUserException
- */
- public static function getUidAndFilename($filename) {
- $uid = Filesystem::getOwner($filename);
- $userManager = \OC::$server->getUserManager();
- // if the user with the UID doesn't exists, e.g. because the UID points
- // to a remote user with a federated cloud ID we use the current logged-in
- // user. We need a valid local user to create the share
- if (!$userManager->userExists($uid)) {
- $uid = User::getUser();
- }
- Filesystem::initMountPoints($uid);
- if ( $uid !== User::getUser() ) {
- $info = Filesystem::getFileInfo($filename);
- $ownerView = new View('/'.$uid.'/files');
- try {
- $filename = $ownerView->getPath($info['fileid']);
- } catch (NotFoundException $e) {
- $filename = null;
- }
- }
- return [$uid, $filename];
- }
-
- /**
- * Format a path to be relative to the /user/files/ directory
- * @param string $path the absolute path
- * @return string e.g. turns '/admin/files/test.txt' into 'test.txt'
- */
- public static function stripUserFilesPath($path) {
- $trimmed = ltrim($path, '/');
- $split = explode('/', $trimmed);
-
- // it is not a file relative to data/user/files
- if (count($split) < 3 || $split[1] !== 'files') {
- return false;
- }
-
- $sliced = array_slice($split, 2);
- $relPath = implode('/', $sliced);
-
- return $relPath;
- }
-
- /**
- * check if file name already exists and generate unique target
- *
- * @param string $path
- * @param array $excludeList
- * @param View $view
- * @return string $path
- */
- public static function generateUniqueTarget($path, $excludeList, $view) {
- $pathinfo = pathinfo($path);
- $ext = (isset($pathinfo['extension'])) ? '.'.$pathinfo['extension'] : '';
- $name = $pathinfo['filename'];
- $dir = $pathinfo['dirname'];
- $i = 2;
- while ($view->file_exists($path) || in_array($path, $excludeList)) {
- $path = Filesystem::normalizePath($dir . '/' . $name . ' ('.$i.')' . $ext);
- $i++;
- }
-
- return $path;
- }
-
- /**
- * get default share folder
- *
- * @param \OC\Files\View
- * @return string
- */
- public static function getShareFolder($view = null) {
- if ($view === null) {
- $view = Filesystem::getView();
- }
- $shareFolder = \OC::$server->getConfig()->getSystemValue('share_folder', '/');
- $shareFolder = Filesystem::normalizePath($shareFolder);
-
- if (!$view->file_exists($shareFolder)) {
- $dir = '';
- $subdirs = explode('/', $shareFolder);
- foreach ($subdirs as $subdir) {
- $dir = $dir . '/' . $subdir;
- if (!$view->is_dir($dir)) {
- $view->mkdir($dir);
- }
- }
- }
-
- return $shareFolder;
-
- }
-
- /**
- * set default share folder
- *
- * @param string $shareFolder
- */
- public static function setShareFolder($shareFolder) {
- \OC::$server->getConfig()->setSystemValue('share_folder', $shareFolder);
- }
-
- }
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