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<?php
/**
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <icewind@owncloud.com>
*
* @copyright Copyright (c) 2015, 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\Propagation;
use Doctrine\DBAL\Connection;
use OC\Files\Cache\ChangePropagator;
use OC\Files\View;
use OC\Share\Share;
use OCP\IGroupManager;
use OCP\IUser;
/**
* Propagate etags for share recipients
*/
class RecipientPropagator {
/**
* @var string
*/
protected $userId;
/**
* @var \OC\Files\Cache\ChangePropagator
*/
protected $changePropagator;
/**
* @var \OCP\IConfig
*/
protected $config;
/**
* @var PropagationManager
*/
private $manager;
/**
* @var IGroupManager
*/
private $groupManager;
/**
* @var IUser
*/
private $user;
/**
* @param IUser $user current user, must match the propagator's
* user
* @param \OC\Files\Cache\ChangePropagator $changePropagator change propagator
* initialized with a view for $user
* @param \OCP\IConfig $config
* @param PropagationManager $manager
* @param IGroupManager $groupManager
*/
public function __construct(IUser $user, $changePropagator, $config, PropagationManager $manager, IGroupManager $groupManager) {
$this->userId = $user->getUID();
$this->user = $user;
$this->changePropagator = $changePropagator;
$this->config = $config;
$this->manager = $manager;
$this->groupManager = $groupManager;
}
/**
* Propagate the etag changes for all shares marked as dirty and mark the shares as clean
*
* @param array $shares the shares for the users
* @param int $time
*/
public function propagateDirtyMountPoints(array $shares, $time = null) {
if ($time === null) {
$time = microtime(true);
}
$dirtyShares = $this->getDirtyShares($shares);
foreach ($dirtyShares as $share) {
$this->changePropagator->addChange($share['file_target']);
}
if (count($dirtyShares)) {
$this->config->setUserValue($this->userId, 'files_sharing', 'last_propagate', $time);
$this->changePropagator->propagateChanges(floor($time));
}
}
/**
* Get all shares we need to update the etag for
*
* @param array $shares the shares for the users
* @return string[]
*/
protected function getDirtyShares($shares) {
$dirty = [];
$userTime = $this->config->getUserValue($this->userId, 'files_sharing', 'last_propagate', 0);
$sharePropagations = [];
foreach ($shares as $share) {
$sharePropagations[(int) $share['id']] = 0;
}
$sharePropagations = $this->getPropagationTimestampForShares($sharePropagations);
foreach ($shares as $share) {
if ($sharePropagations[$share['id']] >= $userTime) {
$dirty[] = $share;
}
}
return $dirty;
}
/**
* Load the last dirty timestamp from the appconfig table
*
* @param int[] $sharePropagations
* @return int[]
*/
protected function getPropagationTimestampForShares(array $sharePropagations) {
$sql = \OC::$server->getDatabaseConnection()->getQueryBuilder();
$allShareIds = array_keys($sharePropagations);
$shareIdChunks = array_chunk($allShareIds, 50);
$sql->select(['configkey', 'configvalue'])
->from('appconfig')
->where($sql->expr()->eq('appid', $sql->createParameter('appid')))
->andWhere($sql->expr()->in('configkey', $sql->createParameter('shareids')))
->setParameter('appid', 'files_sharing', \PDO::PARAM_STR);
foreach ($shareIdChunks as $shareIds) {
$sql->setParameter('shareids', $shareIds, Connection::PARAM_STR_ARRAY);
$result = $sql->execute();
while ($row = $result->fetch()) {
$sharePropagations[(int) $row['configkey']] = $row['configvalue'];
}
$result->closeCursor();
}
return $sharePropagations;
}
/**
* @param array $share
* @param float $time
*/
public function markDirty($share, $time = null) {
if ($time === null) {
$time = microtime(true);
}
$this->config->setAppValue('files_sharing', $share['id'], $time);
}
/**
* Listen on the propagator for updates made to shares owned by a user
*
* @param \OC\Files\Cache\ChangePropagator $propagator
* @param string $owner
*/
public function attachToPropagator(ChangePropagator $propagator, $owner) {
$propagator->listen('\OC\Files', 'propagate', function ($path, $entry) use ($owner) {
$this->propagateById($entry['fileid']);
});
}
protected $propagatingIds = [];
public function propagateById($id) {
if (isset($this->propagatingIds[$id])) {
return;
}
$this->propagatingIds[$id] = true;
$shares = Share::getAllSharesForFileId($id);
foreach ($shares as $share) {
// propagate down the share tree
$this->markDirty($share, microtime(true));
// propagate up the share tree
if ($this->isRecipientOfShare($share)) {
$user = $share['uid_owner'];
$view = new View('/' . $user . '/files');
$path = $view->getPath($share['file_source']);
$watcher = new ChangeWatcher($view, $this->manager->getSharePropagator($user));
$watcher->writeHook(['path' => $path]);
}
}
unset($this->propagatingIds[$id]);
}
/**
* Check if the user for this recipient propagator is the recipient of a share
*
* @param array $share
* @return bool
*/
private function isRecipientOfShare($share) {
if ($share['share_with'] === $this->userId && $share['share_type'] == \OCP\Share::SHARE_TYPE_USER) { // == since 'share_type' is a string
return true;
}
if ($share['share_type'] == \OCP\Share::SHARE_TYPE_GROUP) {
$groups = $this->groupManager->getUserGroupIds($this->user);
return in_array($share['share_with'], $groups);
}
return false;
}
}
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