* @author Joas Schilling * @author Julius Härtl * @author Maxence Lange * @author Morris Jobke * @author Robin Appelman * @author Roeland Jago Douma * @author Vincent Petry * * @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 * */ namespace OCA\Files_Sharing; use OCP\Cache\CappedMemoryCache; use OC\Files\View; use OCA\Files_Sharing\Event\ShareMountedEvent; use OCP\EventDispatcher\IEventDispatcher; use OCP\Files\Config\IMountProvider; use OCP\Files\Storage\IStorageFactory; use OCP\ICacheFactory; use OCP\IConfig; use OCP\IUser; use OCP\Share\IManager; use OCP\Share\IShare; use Psr\Log\LoggerInterface; class MountProvider implements IMountProvider { /** * @param \OCP\IConfig $config * @param IManager $shareManager * @param LoggerInterface $logger */ public function __construct( protected IConfig $config, protected IManager $shareManager, protected LoggerInterface $logger, protected IEventDispatcher $eventDispatcher, protected ICacheFactory $cacheFactory ) { } /** * Get all mountpoints applicable for the user and check for shares where we need to update the etags * * @param \OCP\IUser $user * @param \OCP\Files\Storage\IStorageFactory $loader * @return \OCP\Files\Mount\IMountPoint[] */ public function getMountsForUser(IUser $user, IStorageFactory $loader) { $shares = $this->shareManager->getSharedWith($user->getUID(), IShare::TYPE_USER, null, -1); $shares = array_merge($shares, $this->shareManager->getSharedWith($user->getUID(), IShare::TYPE_GROUP, null, -1)); $shares = array_merge($shares, $this->shareManager->getSharedWith($user->getUID(), IShare::TYPE_CIRCLE, null, -1)); $shares = array_merge($shares, $this->shareManager->getSharedWith($user->getUID(), IShare::TYPE_ROOM, null, -1)); $shares = array_merge($shares, $this->shareManager->getSharedWith($user->getUID(), IShare::TYPE_DECK, null, -1)); $shares = array_merge($shares, $this->shareManager->getSharedWith($user->getUID(), IShare::TYPE_SCIENCEMESH, null, -1)); // filter out excluded shares and group shares that includes self $shares = array_filter($shares, function (\OCP\Share\IShare $share) use ($user) { return $share->getPermissions() > 0 && $share->getShareOwner() !== $user->getUID(); }); $superShares = $this->buildSuperShares($shares, $user); $mounts = []; $view = new View('/' . $user->getUID() . '/files'); $ownerViews = []; $sharingDisabledForUser = $this->shareManager->sharingDisabledForUser($user->getUID()); /** @var CappedMemoryCache $folderExistCache */ $foldersExistCache = new CappedMemoryCache(); foreach ($superShares as $share) { try { /** @var \OCP\Share\IShare $parentShare */ $parentShare = $share[0]; if ($parentShare->getStatus() !== IShare::STATUS_ACCEPTED && ($parentShare->getShareType() === IShare::TYPE_GROUP || $parentShare->getShareType() === IShare::TYPE_USERGROUP || $parentShare->getShareType() === IShare::TYPE_USER)) { continue; } $owner = $parentShare->getShareOwner(); if (!isset($ownerViews[$owner])) { $ownerViews[$owner] = new View('/' . $parentShare->getShareOwner() . '/files'); } $mount = new SharedMount( '\OCA\Files_Sharing\SharedStorage', $mounts, [ 'user' => $user->getUID(), // parent share 'superShare' => $parentShare, // children/component of the superShare 'groupedShares' => $share[1], 'ownerView' => $ownerViews[$owner], 'sharingDisabledForUser' => $sharingDisabledForUser ], $loader, $view, $foldersExistCache, $this->eventDispatcher, $user, $this->cacheFactory->createLocal('share-valid-mountpoint') ); $event = new ShareMountedEvent($mount); $this->eventDispatcher->dispatchTyped($event); $mounts[$mount->getMountPoint()] = $mount; foreach ($event->getAdditionalMounts() as $additionalMount) { $mounts[$additionalMount->getMountPoint()] = $additionalMount; } } catch (\Exception $e) { $this->logger->error( 'Error while trying to create shared mount', [ 'app' => 'files_sharing', 'exception' => $e, ], ); } } // array_filter removes the null values from the array return array_values(array_filter($mounts)); } /** * Groups shares by path (nodeId) and target path * * @param \OCP\Share\IShare[] $shares * @return \OCP\Share\IShare[][] array of grouped shares, each element in the * array is a group which itself is an array of shares */ private function groupShares(array $shares) { $tmp = []; foreach ($shares as $share) { if (!isset($tmp[$share->getNodeId()])) { $tmp[$share->getNodeId()] = []; } $tmp[$share->getNodeId()][] = $share; } $result = []; // sort by stime, the super share will be based on the least recent share foreach ($tmp as &$tmp2) { @usort($tmp2, function ($a, $b) { $aTime = $a->getShareTime()->getTimestamp(); $bTime = $b->getShareTime()->getTimestamp(); if ($aTime === $bTime) { return $a->getId() < $b->getId() ? -1 : 1; } return $aTime < $bTime ? -1 : 1; }); $result[] = $tmp2; } return array_values($result); } /** * Build super shares (virtual share) by grouping them by node id and target, * then for each group compute the super share and return it along with the matching * grouped shares. The most permissive permissions are used based on the permissions * of all shares within the group. * * @param \OCP\Share\IShare[] $allShares * @param \OCP\IUser $user user * @return array Tuple of [superShare, groupedShares] */ private function buildSuperShares(array $allShares, \OCP\IUser $user) { $result = []; $groupedShares = $this->groupShares($allShares); /** @var \OCP\Share\IShare[] $shares */ foreach ($groupedShares as $shares) { if (count($shares) === 0) { continue; } $superShare = $this->shareManager->newShare(); // compute super share based on first entry of the group $superShare->setId($shares[0]->getId()) ->setShareOwner($shares[0]->getShareOwner()) ->setNodeId($shares[0]->getNodeId()) ->setShareType($shares[0]->getShareType()) ->setTarget($shares[0]->getTarget()); // Gather notes from all the shares. // Since these are readly available here, storing them // enables the DAV FilesPlugin to avoid executing many // DB queries to retrieve the same information. $allNotes = implode("\n", array_map(function ($sh) { return $sh->getNote(); }, $shares)); $superShare->setNote($allNotes); // use most permissive permissions // this covers the case where there are multiple shares for the same // file e.g. from different groups and different permissions $superPermissions = 0; $superAttributes = $this->shareManager->newShare()->newAttributes(); $status = IShare::STATUS_PENDING; foreach ($shares as $share) { $superPermissions |= $share->getPermissions(); $status = max($status, $share->getStatus()); // update permissions $superPermissions |= $share->getPermissions(); // update share permission attributes $attributes = $share->getAttributes(); if ($attributes !== null) { foreach ($attributes->toArray() as $attribute) { if ($superAttributes->getAttribute($attribute['scope'], $attribute['key']) === true) { // if super share attribute is already enabled, it is most permissive continue; } // update supershare attributes with subshare attribute $superAttributes->setAttribute($attribute['scope'], $attribute['key'], $attribute['enabled']); } } // adjust target, for database consistency if needed if ($share->getTarget() !== $superShare->getTarget()) { $share->setTarget($superShare->getTarget()); try { $this->shareManager->moveShare($share, $user->getUID()); } catch (\InvalidArgumentException $e) { // ignore as it is not important and we don't want to // block FS setup // the subsequent code anyway only uses the target of the // super share // such issue can usually happen when dealing with // null groups which usually appear with group backend // caching inconsistencies $this->logger->debug( 'Could not adjust share target for share ' . $share->getId() . ' to make it consistent: ' . $e->getMessage(), ['app' => 'files_sharing'] ); } } if (!is_null($share->getNodeCacheEntry())) { $superShare->setNodeCacheEntry($share->getNodeCacheEntry()); } } $superShare->setPermissions($superPermissions); $superShare->setStatus($status); $superShare->setAttributes($superAttributes); $result[] = [$superShare, $shares]; } return $result; } }