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<?php
/**
* Copyright (c) 2015 Robin Appelman <icewind@owncloud.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OCA\Files_Sharing\Propagation;
use OC\Files\Filesystem;
use OC\Files\View;
use OCP\IConfig;
use OCP\IUserSession;
/**
* Keep track of all change and share propagators by owner
*/
class PropagationManager {
/**
* @var \OCP\IUserSession
*/
private $userSession;
/**
* @var \OCP\IConfig
*/
private $config;
/**
* Change propagators for share owner
*
* @var \OC\Files\Cache\ChangePropagator[]
*/
private $changePropagators = [];
/**
* Recipient propagators
*
* @var \OCA\Files_Sharing\Propagation\RecipientPropagator[]
*/
private $sharePropagators = [];
public function __construct(IUserSession $userSession, IConfig $config) {
$this->userSession = $userSession;
$this->config = $config;
}
/**
* @param string $user
* @return \OC\Files\Cache\ChangePropagator
*/
public function getChangePropagator($user) {
$activeUser = $this->userSession->getUser();
// for the local user we want to propagator from the active view, not any cached one
if ($activeUser && $activeUser->getUID() === $user && Filesystem::getView() instanceof View) {
// it's important that we take the existing propagator here to make sure we can listen to external changes
$this->changePropagators[$user] = Filesystem::getView()->getUpdater()->getPropagator();
}
if (isset($this->changePropagators[$user])) {
return $this->changePropagators[$user];
}
$view = new View('/' . $user . '/files');
$this->changePropagators[$user] = $view->getUpdater()->getPropagator();
return $this->changePropagators[$user];
}
/**
* @param string $user
* @return \OCA\Files_Sharing\Propagation\RecipientPropagator
*/
public function getSharePropagator($user) {
if (isset($this->sharePropagators[$user])) {
return $this->sharePropagators[$user];
}
$this->sharePropagators[$user] = new RecipientPropagator($user, $this->getChangePropagator($user), $this->config);
return $this->sharePropagators[$user];
}
/**
* Attach the recipient propagator for $user to the change propagator of a share owner to mark shares as dirty when the owner makes a change to a share
*
* @param string $shareOwner
* @param string $user
*/
public function listenToOwnerChanges($shareOwner, $user) {
$sharePropagator = $this->getSharePropagator($user);
$ownerPropagator = $this->getChangePropagator($shareOwner);
$sharePropagator->attachToPropagator($ownerPropagator, $shareOwner);
}
/**
* To be called from setupFS trough a hook
*
* Sets up listening to changes made to shares owned by the current user
*/
public function globalSetup() {
$user = $this->userSession->getUser();
if (!$user) {
return;
}
$watcher = new ChangeWatcher(Filesystem::getView());
// for marking shares owned by the active user as dirty when a file inside them changes
$this->listenToOwnerChanges($user->getUID(), $user->getUID());
\OC_Hook::connect('OC_Filesystem', 'post_write', $watcher, 'writeHook');
\OC_Hook::connect('OC_Filesystem', 'post_delete', $watcher, 'writeHook');
\OC_Hook::connect('OC_Filesystem', 'post_rename', $watcher, 'renameHook');
}
}
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