292 lines
8.8 KiB
PHP
292 lines
8.8 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* @copyright Copyright (c) 2023 Varun Patil <radialapps@gmail.com>
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* @author Varun Patil <radialapps@gmail.com>
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* @license AGPL-3.0-or-later
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*
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* This program 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 as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace OCA\Memories\Controller;
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use OCA\Memories\Db\TimelineQuery;
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use OCA\Memories\Db\TimelineRoot;
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use OCA\Memories\Exif;
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use OCA\Memories\Util;
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use OCP\Files\File;
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use OCP\Files\Folder;
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use OCP\Files\IRootFolder;
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use OCP\IConfig;
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use OCP\IUserSession;
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trait GenericApiControllerFs
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{
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use GenericApiControllerParams;
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use GenericApiControllerUtils;
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protected IConfig $config;
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protected IUserSession $userSession;
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protected IRootFolder $rootFolder;
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protected TimelineQuery $timelineQuery;
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/** Get the TimelineRoot object relevant to the request */
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protected function getRequestRoot()
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{
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$user = $this->userSession->getUser();
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$root = new TimelineRoot();
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// Albums have no folder
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if ($this->albumsIsEnabled() && $this->request->getParam('album')) {
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if (null !== $user) {
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return $root;
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}
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if (($token = $this->getShareToken()) && $this->timelineQuery->getAlbumByLink($token)) {
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return $root;
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}
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}
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// Public shared folder
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if ($share = $this->getShareNode()) { // can throw
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if (!$share instanceof Folder) {
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throw new \Exception('Share is not a folder');
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}
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$root->addFolder($share);
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return $root;
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}
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// Anything else needs a user
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if (null === $user) {
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throw new \Exception('User not logged in');
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}
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$uid = $user->getUID();
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$folder = null;
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$folderPath = $this->request->getParam('folder');
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$userFolder = $this->rootFolder->getUserFolder($uid);
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try {
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if (null !== $folderPath) {
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$folder = $userFolder->get(Exif::removeExtraSlash($folderPath));
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$root->addFolder($folder);
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} else {
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$timelinePath = $this->request->getParam('timelinePath', Exif::getPhotosPath($this->config, $uid));
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$timelinePath = Exif::removeExtraSlash($timelinePath);
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// Multiple timeline path support
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$paths = explode(';', $timelinePath);
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foreach ($paths as &$path) {
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$folder = $userFolder->get(trim($path));
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$root->addFolder($folder);
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}
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$root->addMountPoints();
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}
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} catch (\OCP\Files\NotFoundException $e) {
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$msg = $e->getMessage();
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throw new \Exception("Folder not found: {$msg}");
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}
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return $root;
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}
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/**
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* Get a file with ID for the current user.
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*/
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protected function getUserFile(int $fileId): ?File
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{
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// Don't check self for share token
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if ($this->getShareToken()) {
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return $this->getShareFile($fileId);
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}
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// Check both user folder and album
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return $this->getUserFolderFile($fileId) ??
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$this->getAlbumFile($fileId);
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}
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/**
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* Get a file with ID from user's folder.
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*/
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protected function getUserFolderFile(int $id): ?File
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{
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$user = $this->userSession->getUser();
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if (null === $user) {
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return null;
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}
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$userFolder = $this->rootFolder->getUserFolder($user->getUID());
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// No need to force permissions when reading
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// from the user's own folder. This includes shared
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// folders and files from other users.
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return $this->getOneFileFromFolder($userFolder, $id);
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}
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/**
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* Get a file with ID from an album.
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*/
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protected function getAlbumFile(int $id): ?File
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{
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$user = $this->userSession->getUser();
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if (null === $user) {
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return null;
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}
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$uid = $user->getUID();
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$owner = $this->timelineQuery->albumHasUserFile($uid, $id);
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if (!$owner) {
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return null;
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}
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$folder = $this->rootFolder->getUserFolder($owner);
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// Album files are always read-only
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// Note that albums have lowest priority, so it means the
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// user doesn't have access to the file in their own folder.
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return $this->getOneFileFromFolder($folder, $id, \OCP\Constants::PERMISSION_READ);
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}
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/**
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* Get a file with ID from a public share.
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*
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* @param int $fileId
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*/
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protected function getShareFile(int $id): ?File
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{
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try {
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// Album share
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if ($this->request->getParam('album')) {
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$album = $this->timelineQuery->getAlbumByLink($this->getShareToken());
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if (null === $album) {
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return null;
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}
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$owner = $this->timelineQuery->albumHasFile((int) $album['album_id'], $id);
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if (!$owner) {
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return null;
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}
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$folder = $this->rootFolder->getUserFolder($owner);
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// Public albums are always read-only
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return $this->getOneFileFromFolder($folder, $id, \OCP\Constants::PERMISSION_READ);
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}
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// Folder share
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if ($share = $this->getShareNode()) {
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// Public shares may allow editing
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// Just use the same permissions as the share
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if ($share instanceof File) {
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return $share;
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}
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if ($share instanceof Folder) {
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return $this->getOneFileFromFolder($share, $id, $share->getPermissions());
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}
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return null;
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}
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} catch (\Exception $e) {
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}
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return null;
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}
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protected function getShareObject()
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{
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// Get token from request
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$token = $this->getShareToken();
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if (null === $token) {
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return null;
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}
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// Get share by token
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$share = \OC::$server->get(\OCP\Share\IManager::class)->getShareByToken($token);
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if (!PublicController::validateShare($share)) {
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return null;
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}
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// Check if share is password protected
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if (($password = $share->getPassword()) !== null) {
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$session = \OC::$server->get(\OCP\ISession::class);
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// https://github.com/nextcloud/server/blob/0447b53bda9fe95ea0cbed765aa332584605d652/lib/public/AppFramework/PublicShareController.php#L119
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if (
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$session->get('public_link_authenticated_token') !== $token
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|| $session->get('public_link_authenticated_password_hash') !== $password
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) {
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throw new \Exception('Share is password protected and user is not authenticated');
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}
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}
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return $share;
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}
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protected function getShareNode()
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{
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$share = $this->getShareObject();
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if (null === $share) {
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return null;
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}
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// Get node from share
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$node = $share->getNode(); // throws exception if not found
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if (!$node->isReadable() || !$node->isShareable()) {
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throw new \Exception('Share not found or invalid');
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}
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// Force permissions from the share onto the node
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Util::forcePermissions($node, $share->getPermissions());
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return $node;
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}
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/**
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* Helper to get one file or null from a fiolder.
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*
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* @param Folder $folder Folder to search in
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* @param int $id Id of the file
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* @param int $perm Permissions to force on the file
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*/
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private function getOneFileFromFolder(Folder $folder, int $id, int $perm = -1): ?File
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{
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// Check for permissions and get numeric Id
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$file = $folder->getById($id);
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if (0 === \count($file)) {
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return null;
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}
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$file = $file[0];
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// Check if node is a file
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if (!$file instanceof File) {
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return null;
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}
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// Check read permission
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if (!$file->isReadable()) {
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return null;
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}
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// Force file permissions if required
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if ($perm >= 0) {
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Util::forcePermissions($file, $perm);
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}
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return $file;
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}
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}
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