nextcloud/apps/files_sharing/api/share20ocs.php

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<?php
/**
* @author Roeland Jago Douma <rullzer@owncloud.com>
*
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* @copyright Copyright (c) 2016, ownCloud, Inc.
* @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\API;
use OCP\IGroupManager;
use OCP\IUserManager;
use OCP\IRequest;
use OCP\IURLGenerator;
use OCP\IUser;
use OCP\Files\IRootFolder;
class Share20OCS {
/** @var \OC\Share20\Manager */
private $shareManager;
/** @var IGroupManager */
private $groupManager;
/** @var IUserManager */
private $userManager;
/** @var IRequest */
private $request;
/** @var IRootFolder */
private $rootFolder;
/** @var IUrlGenerator */
private $urlGenerator;
/** @var IUser */
private $currentUser;
public function __construct(
\OC\Share20\Manager $shareManager,
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IGroupManager $groupManager,
IUserManager $userManager,
IRequest $request,
IRootFolder $rootFolder,
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IURLGenerator $urlGenerator,
IUser $currentUser
) {
$this->shareManager = $shareManager;
$this->userManager = $userManager;
$this->groupManager = $groupManager;
$this->request = $request;
$this->rootFolder = $rootFolder;
$this->urlGenerator = $urlGenerator;
$this->currentUser = $currentUser;
}
/**
* Convert an IShare to an array for OCS output
*
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* @param \OCP\Share\IShare $share
* @return array
*/
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protected function formatShare(\OCP\Share\IShare $share) {
$result = [
'id' => $share->getId(),
'share_type' => $share->getShareType(),
'uid_owner' => $share->getSharedBy()->getUID(),
'displayname_owner' => $share->getSharedBy()->getDisplayName(),
'permissions' => $share->getPermissions(),
'stime' => $share->getShareTime()->getTimestamp(),
'parent' => null,
'expiration' => null,
'token' => null,
'uid_file_owner' => $share->getShareOwner()->getUID(),
'displayname_file_owner' => $share->getShareOwner()->getDisplayName(),
];
$node = $share->getNode();
$result['path'] = $this->rootFolder->getUserFolder($share->getShareOwner()->getUID())->getRelativePath($node->getPath());
if ($node instanceOf \OCP\Files\Folder) {
$result['item_type'] = 'folder';
} else {
$result['item_type'] = 'file';
}
$result['storage_id'] = $node->getStorage()->getId();
$result['storage'] = $node->getStorage()->getCache()->getNumericStorageId();
$result['item_source'] = $node->getId();
$result['file_source'] = $node->getId();
$result['file_parent'] = $node->getParent()->getId();
$result['file_target'] = $share->getTarget();
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_USER) {
$sharedWith = $share->getSharedWith();
$result['share_with'] = $sharedWith->getUID();
$result['share_with_displayname'] = $sharedWith->getDisplayName();
} else if ($share->getShareType() === \OCP\Share::SHARE_TYPE_GROUP) {
$sharedWith = $share->getSharedWith();
$result['share_with'] = $sharedWith->getGID();
$result['share_with_displayname'] = $sharedWith->getGID();
} else if ($share->getShareType() === \OCP\Share::SHARE_TYPE_LINK) {
$result['share_with'] = $share->getPassword();
$result['share_with_displayname'] = $share->getPassword();
$result['token'] = $share->getToken();
$result['url'] = $this->urlGenerator->linkToRouteAbsolute('files_sharing.sharecontroller.showShare', ['token' => $share->getToken()]);
$expiration = $share->getExpirationDate();
if ($expiration !== null) {
$result['expiration'] = $expiration->format('Y-m-d 00:00:00');
}
} else if ($share->getShareType() === \OCP\Share::SHARE_TYPE_REMOTE) {
$result['share_with'] = $share->getSharedWith();
$result['share_with_displayname'] = $share->getSharedWith();
$result['token'] = $share->getToken();
}
$result['mail_send'] = $share->getMailSend() ? 1 : 0;
return $result;
}
/**
* Get a specific share by id
*
* @param string $id
* @return \OC_OCS_Result
*/
public function getShare($id) {
// Try both our default, and our federated provider..
$share = null;
// First check if it is an internal share.
try {
$share = $this->shareManager->getShareById('ocinternal:'.$id);
} catch (\OC\Share20\Exception\ShareNotFound $e) {
// Ignore for now
//return new \OC_OCS_Result(null, 404, 'wrong share ID, share doesn\'t exist.');
}
if ($share === null) {
//For now federated shares are handled by the old endpoint.
return \OCA\Files_Sharing\API\Local::getShare(['id' => $id]);
}
if ($this->canAccessShare($share)) {
$share = $this->formatShare($share);
return new \OC_OCS_Result($share);
} else {
return new \OC_OCS_Result(null, 404, 'wrong share ID, share doesn\'t exist.');
}
}
/**
* Delete a share
*
* @param string $id
* @return \OC_OCS_Result
*/
public function deleteShare($id) {
// Try both our default and our federated provider
$share = null;
try {
$share = $this->shareManager->getShareById('ocinternal:' . $id);
} catch (\OC\Share20\Exception\ShareNotFound $e) {
//Ignore for now
//return new \OC_OCS_Result(null, 404, 'wrong share ID, share doesn\'t exist.');
}
// Could not find the share as internal share... maybe it is a federated share
if ($share === null) {
return \OCA\Files_Sharing\API\Local::deleteShare(['id' => $id]);
}
if (!$this->canAccessShare($share)) {
return new \OC_OCS_Result(null, 404, 'could not delete share');
}
try {
$this->shareManager->deleteShare($share);
} catch (\OC\Share20\Exception\BackendError $e) {
return new \OC_OCS_Result(null, 404, 'could not delete share');
}
return new \OC_OCS_Result();
}
/**
* @return \OC_OCS_Result
*/
public function createShare() {
$share = $this->shareManager->newShare();
// Verify path
$path = $this->request->getParam('path', null);
if ($path === null) {
return new \OC_OCS_Result(null, 404, 'please specify a file or folder path');
}
$userFolder = $this->rootFolder->getUserFolder($this->currentUser->getUID());
try {
$path = $userFolder->get($path);
} catch (\OCP\Files\NotFoundException $e) {
return new \OC_OCS_Result(null, 404, 'wrong path, file/folder doesn\'t exist');
}
$share->setNode($path);
// Parse permissions (if available)
$permissions = $this->request->getParam('permissions', null);
if ($permissions === null) {
$permissions = \OCP\Constants::PERMISSION_ALL;
} else {
$permissions = (int)$permissions;
}
if ($permissions < 0 || $permissions > \OCP\Constants::PERMISSION_ALL) {
return new \OC_OCS_Result(null, 404, 'invalid permissions');
}
// Shares always require read permissions
$permissions |= \OCP\Constants::PERMISSION_READ;
if ($path instanceof \OCP\Files\File) {
// Single file shares should never have delete or create permissions
$permissions &= ~\OCP\Constants::PERMISSION_DELETE;
$permissions &= ~\OCP\Constants::PERMISSION_CREATE;
}
$shareWith = $this->request->getParam('shareWith', null);
$shareType = (int)$this->request->getParam('shareType', '-1');
if ($shareType === \OCP\Share::SHARE_TYPE_USER) {
// Valid user is required to share
if ($shareWith === null || !$this->userManager->userExists($shareWith)) {
return new \OC_OCS_Result(null, 404, 'please specify a valid user');
}
$share->setSharedWith($this->userManager->get($shareWith));
$share->setPermissions($permissions);
} else if ($shareType === \OCP\Share::SHARE_TYPE_GROUP) {
// Valid group is required to share
if ($shareWith === null || !$this->groupManager->groupExists($shareWith)) {
return new \OC_OCS_Result(null, 404, 'please specify a valid group');
}
$share->setSharedWith($this->groupManager->get($shareWith));
$share->setPermissions($permissions);
} else if ($shareType === \OCP\Share::SHARE_TYPE_LINK) {
//Can we even share links?
if (!$this->shareManager->shareApiAllowLinks()) {
return new \OC_OCS_Result(null, 404, 'public link sharing is disabled by the administrator');
}
$publicUpload = $this->request->getParam('publicUpload', null);
if ($publicUpload === 'true') {
// Check if public upload is allowed
if (!$this->shareManager->shareApiLinkAllowPublicUpload()) {
return new \OC_OCS_Result(null, 403, 'public upload disabled by the administrator');
}
// Public upload can only be set for folders
if ($path instanceof \OCP\Files\File) {
return new \OC_OCS_Result(null, 404, 'public upload is only possible for public shared folders');
}
$share->setPermissions(
\OCP\Constants::PERMISSION_READ |
\OCP\Constants::PERMISSION_CREATE |
\OCP\Constants::PERMISSION_UPDATE
);
} else {
$share->setPermissions(\OCP\Constants::PERMISSION_READ);
}
// Set password
$password = $this->request->getParam('password', '');
if ($password !== '') {
$share->setPassword($password);
}
//Expire date
$expireDate = $this->request->getParam('expireDate', '');
if ($expireDate !== '') {
try {
$expireDate = $this->parseDate($expireDate);
$share->setExpirationDate($expireDate);
} catch (\Exception $e) {
return new \OC_OCS_Result(null, 404, 'Invalid Date. Format must be YYYY-MM-DD.');
}
}
} else if ($shareType === \OCP\Share::SHARE_TYPE_REMOTE) {
//fixme Remote shares are handled by old code path for now
return \OCA\Files_Sharing\API\Local::createShare([]);
} else {
return new \OC_OCS_Result(null, 400, "unknown share type");
}
$share->setShareType($shareType);
$share->setSharedBy($this->currentUser);
try {
$share = $this->shareManager->createShare($share);
} catch (\OC\HintException $e) {
$code = $e->getCode() === 0 ? 403 : $e->getCode();
return new \OC_OCS_Result(null, $code, $e->getHint());
}catch (\Exception $e) {
return new \OC_OCS_Result(null, 403, $e->getMessage());
}
$share = $this->formatShare($share);
return new \OC_OCS_Result($share);
}
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private function getSharedWithMe() {
$userShares = $this->shareManager->getSharedWith($this->currentUser, \OCP\Share::SHARE_TYPE_USER, -1, 0);
$groupShares = $this->shareManager->getSharedWith($this->currentUser, \OCP\Share::SHARE_TYPE_GROUP, -1, 0);
$shares = array_merge($userShares, $groupShares);
$formatted = [];
foreach ($shares as $share) {
if ($this->canAccessShare($share)) {
$formatted[] = $this->formatShare($share);
}
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}
return new \OC_OCS_Result($formatted);
}
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/**
* @param \OCP\Files\Folder $folder
* @return \OC_OCS_Result
*/
private function getSharesInDir($folder) {
if (!($folder instanceof \OCP\Files\Folder)) {
return new \OC_OCS_Result(null, 400, "not a directory");
}
$nodes = $folder->getDirectoryListing();
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/** @var \OCP\Share\IShare[] $shares */
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$shares = [];
foreach ($nodes as $node) {
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$shares = array_merge($shares, $this->shareManager->getSharesBy($this->currentUser, \OCP\Share::SHARE_TYPE_USER, $node, false, -1, 0));
$shares = array_merge($shares, $this->shareManager->getSharesBy($this->currentUser, \OCP\Share::SHARE_TYPE_GROUP, $node, false, -1, 0));
$shares = array_merge($shares, $this->shareManager->getSharesBy($this->currentUser, \OCP\Share::SHARE_TYPE_LINK, $node, false, -1, 0));
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//TODO: Add federated shares
}
$formatted = [];
foreach ($shares as $share) {
$formatted[] = $this->formatShare($share);
}
return new \OC_OCS_Result($formatted);
}
/**
* The getShares function.
*
* - Get shares by the current user
* - Get shares by the current user and reshares (?reshares=true)
* - Get shares with the current user (?shared_with_me=true)
* - Get shares for a specific path (?path=...)
* - Get all shares in a folder (?subfiles=true&path=..)
*
* @return \OC_OCS_Result
*/
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public function getShares() {
$sharedWithMe = $this->request->getParam('shared_with_me', null);
$reshares = $this->request->getParam('reshares', null);
$subfiles = $this->request->getParam('subfiles');
$path = $this->request->getParam('path', null);
if ($sharedWithMe === 'true') {
return $this->getSharedWithMe();
}
if ($path !== null) {
$userFolder = $this->rootFolder->getUserFolder($this->currentUser->getUID());
try {
$path = $userFolder->get($path);
} catch (\OCP\Files\NotFoundException $e) {
return new \OC_OCS_Result(null, 404, 'wrong path, file/folder doesn\'t exist');
}
}
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if ($subfiles === 'true') {
return $this->getSharesInDir($path);
}
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if ($reshares === 'true') {
$reshares = true;
} else {
$reshares = false;
}
// Get all shares
$userShares = $this->shareManager->getSharesBy($this->currentUser, \OCP\Share::SHARE_TYPE_USER, $path, $reshares, -1, 0);
$groupShares = $this->shareManager->getSharesBy($this->currentUser, \OCP\Share::SHARE_TYPE_GROUP, $path, $reshares, -1, 0);
$linkShares = $this->shareManager->getSharesBy($this->currentUser, \OCP\Share::SHARE_TYPE_LINK, $path, $reshares, -1, 0);
//TODO: Add federated shares
$shares = array_merge($userShares, $groupShares, $linkShares);
$formatted = [];
foreach ($shares as $share) {
$formatted[] = $this->formatShare($share);
}
return new \OC_OCS_Result($formatted);
}
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/**
* @param int $id
* @return \OC_OCS_Result
*/
public function updateShare($id) {
// Try both our default and our federated provider
$share = null;
try {
$share = $this->shareManager->getShareById('ocinternal:' . $id);
} catch (\OC\Share20\Exception\ShareNotFound $e) {
//Ignore for now
//return new \OC_OCS_Result(null, 404, 'wrong share ID, share doesn\'t exist.');
}
// Could not find the share as internal share... maybe it is a federated share
if ($share === null) {
return \OCA\Files_Sharing\API\Local::updateShare(['id' => $id]);
}
if (!$this->canAccessShare($share)) {
return new \OC_OCS_Result(null, 404, 'wrong share Id, share doesn\'t exist.');
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}
$permissions = $this->request->getParam('permissions', null);
$password = $this->request->getParam('password', null);
$publicUpload = $this->request->getParam('publicUpload', null);
$expireDate = $this->request->getParam('expireDate', null);
/*
* expirationdate, password and publicUpload only make sense for link shares
*/
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_LINK) {
if ($permissions === null && $password === null && $publicUpload === null && $expireDate === null) {
return new \OC_OCS_Result(null, 400, 'Wrong or no update parameter given');
}
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$newPermissions = null;
if ($publicUpload === 'true') {
$newPermissions = \OCP\Constants::PERMISSION_READ | \OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_UPDATE;
} else if ($publicUpload === 'false') {
$newPermissions = \OCP\Constants::PERMISSION_READ;
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}
if ($permissions !== null) {
$newPermissions = (int)$permissions;
}
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if ($newPermissions !== null &&
$newPermissions !== \OCP\Constants::PERMISSION_READ &&
$newPermissions !== (\OCP\Constants::PERMISSION_READ | \OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_UPDATE)) {
return new \OC_OCS_Result(null, 400, 'can\'t change permission for public link share');
}
if ($newPermissions === (\OCP\Constants::PERMISSION_READ | \OCP\Constants::PERMISSION_CREATE | \OCP\Constants::PERMISSION_UPDATE)) {
if (!$this->shareManager->shareApiLinkAllowPublicUpload()) {
return new \OC_OCS_Result(null, 403, 'public upload disabled by the administrator');
}
if (!($share->getNode() instanceof \OCP\Files\Folder)) {
return new \OC_OCS_Result(null, 400, "public upload is only possible for public shared folders");
}
}
if ($newPermissions !== null) {
$share->setPermissions($newPermissions);
}
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if ($expireDate === '') {
$share->setExpirationDate(null);
} else if ($expireDate !== null) {
try {
$expireDate = $this->parseDate($expireDate);
} catch (\Exception $e) {
return new \OC_OCS_Result(null, 400, $e->getMessage());
}
$share->setExpirationDate($expireDate);
}
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if ($password === '') {
$share->setPassword(null);
} else if ($password !== null) {
$share->setPassword($password);
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}
} else {
// For other shares only permissions is valid.
if ($permissions === null) {
return new \OC_OCS_Result(null, 400, 'Wrong or no update parameter given');
} else {
$permissions = (int)$permissions;
$share->setPermissions($permissions);
}
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}
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try {
$share = $this->shareManager->updateShare($share);
} catch (\Exception $e) {
return new \OC_OCS_Result(null, 400, $e->getMessage());
}
return new \OC_OCS_Result($this->formatShare($share));
}
public function validatePermissions($permissions) {
if ($permissions < 0 || $permissions > \OCP\Constants::PERMISSION_ALL) {
return false;
}
}
/**
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* @param \OCP\Share\IShare $share
* @return bool
*/
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protected function canAccessShare(\OCP\Share\IShare $share) {
// A file with permissions 0 can't be accessed by us. So Don't show it
if ($share->getPermissions() === 0) {
return false;
}
// Owner of the file and the sharer of the file can always get share
if ($share->getShareOwner() === $this->currentUser ||
$share->getSharedBy() === $this->currentUser
) {
return true;
}
// If the share is shared with you (or a group you are a member of)
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_USER &&
$share->getSharedWith() === $this->currentUser) {
return true;
}
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_GROUP &&
$share->getSharedWith()->inGroup($this->currentUser)) {
return true;
}
return false;
}
/**
* Make sure that the passed date is valid ISO 8601
* So YYYY-MM-DD
* If not throw an exception
*
* @param string $expireDate
*
* @throws \Exception
* @return \DateTime
*/
private function parseDate($expireDate) {
try {
$date = new \DateTime($expireDate);
} catch (\Exception $e) {
throw new \Exception('Invalid date. Format must be YYYY-MM-DD');
}
if ($date === false) {
throw new \Exception('Invalid date. Format must be YYYY-MM-DD');
}
$date->setTime(0,0,0);
return $date;
}
}