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- <?php
- /**
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <icewind@owncloud.com>
- * @author Vincent Petry <pvince81@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_External;
-
- use OC\Files\Filesystem;
-
- /**
- * Updates the etag of parent folders whenever a new external storage mount
- * point has been created or deleted. Updates need to be triggered using
- * the updateHook() method.
- *
- * There are two modes of operation:
- * - for personal mount points, the etag is propagated directly
- * - for system mount points, a dirty flag is saved in the configuration and
- * the etag will be updated the next time propagateDirtyMountPoints() is called
- */
- class EtagPropagator {
- /**
- * @var \OCP\IUser
- */
- protected $user;
-
- /**
- * @var \OC\Files\Cache\ChangePropagator
- */
- protected $changePropagator;
-
- /**
- * @var \OCP\IConfig
- */
- protected $config;
-
- /**
- * @param \OCP\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 $config
- */
- public function __construct($user, $changePropagator, $config) {
- $this->user = $user;
- $this->changePropagator = $changePropagator;
- $this->config = $config;
- }
-
- /**
- * Propagate the etag changes for all mountpoints marked as dirty and mark the mountpoints as clean
- *
- * @param int $time
- */
- public function propagateDirtyMountPoints($time = null) {
- if ($time === null) {
- $time = time();
- }
- $mountPoints = $this->getDirtyMountPoints();
- foreach ($mountPoints as $mountPoint) {
- $this->changePropagator->addChange($mountPoint);
- $this->config->setUserValue($this->user->getUID(), 'files_external', $mountPoint, $time);
- }
- if (count($mountPoints)) {
- $this->changePropagator->propagateChanges($time);
- }
- }
-
- /**
- * Get all mountpoints we need to update the etag for
- *
- * @return string[]
- */
- protected function getDirtyMountPoints() {
- $dirty = array();
- $mountPoints = $this->config->getAppKeys('files_external');
- foreach ($mountPoints as $mountPoint) {
- if (substr($mountPoint, 0, 1) === '/') {
- $updateTime = $this->config->getAppValue('files_external', $mountPoint);
- $userTime = $this->config->getUserValue($this->user->getUID(), 'files_external', $mountPoint);
- if ($updateTime > $userTime) {
- $dirty[] = $mountPoint;
- }
- }
- }
- return $dirty;
- }
-
- /**
- * @param string $mountPoint
- * @param int $time
- */
- protected function markDirty($mountPoint, $time = null) {
- if ($time === null) {
- $time = time();
- }
- $this->config->setAppValue('files_external', $mountPoint, $time);
- }
-
- /**
- * Update etags for mount points for known user
- * For global or group mount points, updating the etag for every user is not feasible
- * instead we mark the mount point as dirty and update the etag when the filesystem is loaded for the user
- * For personal mount points, the change is propagated directly
- *
- * @param array $params hook parameters
- * @param int $time update time to use when marking a mount point as dirty
- */
- public function updateHook($params, $time = null) {
- if ($time === null) {
- $time = time();
- }
- $users = $params[Filesystem::signal_param_users];
- $type = $params[Filesystem::signal_param_mount_type];
- $mountPoint = $params[Filesystem::signal_param_path];
- $mountPoint = Filesystem::normalizePath($mountPoint);
- if ($type === \OC_Mount_Config::MOUNT_TYPE_GROUP or $users === 'all') {
- $this->markDirty($mountPoint, $time);
- } else {
- $this->changePropagator->addChange($mountPoint);
- $this->changePropagator->propagateChanges($time);
- }
- }
- }
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