147 lines
3.9 KiB
PHP
147 lines
3.9 KiB
PHP
<?php
|
|
/**
|
|
* @copyright Copyright (c) 2016, ownCloud, Inc.
|
|
*
|
|
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
|
|
* @author Daniel Jagszent <daniel@jagszent.de>
|
|
* @author Morris Jobke <hey@morrisjobke.de>
|
|
* @author Robin Appelman <robin@icewind.nl>
|
|
* @author Roeland Jago Douma <roeland@famdouma.nl>
|
|
* @author Vincent Petry <pvince81@owncloud.com>
|
|
*
|
|
* @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 OC\Files\Cache;
|
|
use OCP\Files\Cache\ICacheEntry;
|
|
use OCP\Files\Cache\IWatcher;
|
|
|
|
/**
|
|
* check the storage backends for updates and change the cache accordingly
|
|
*/
|
|
class Watcher implements IWatcher {
|
|
|
|
protected $watchPolicy = self::CHECK_ONCE;
|
|
|
|
protected $checkedPaths = [];
|
|
|
|
/**
|
|
* @var \OC\Files\Storage\Storage $storage
|
|
*/
|
|
protected $storage;
|
|
|
|
/**
|
|
* @var Cache $cache
|
|
*/
|
|
protected $cache;
|
|
|
|
/**
|
|
* @var Scanner $scanner ;
|
|
*/
|
|
protected $scanner;
|
|
|
|
/**
|
|
* @param \OC\Files\Storage\Storage $storage
|
|
*/
|
|
public function __construct(\OC\Files\Storage\Storage $storage) {
|
|
$this->storage = $storage;
|
|
$this->cache = $storage->getCache();
|
|
$this->scanner = $storage->getScanner();
|
|
}
|
|
|
|
/**
|
|
* @param int $policy either \OC\Files\Cache\Watcher::CHECK_NEVER, \OC\Files\Cache\Watcher::CHECK_ONCE, \OC\Files\Cache\Watcher::CHECK_ALWAYS
|
|
*/
|
|
public function setPolicy($policy) {
|
|
$this->watchPolicy = $policy;
|
|
}
|
|
|
|
/**
|
|
* @return int either \OC\Files\Cache\Watcher::CHECK_NEVER, \OC\Files\Cache\Watcher::CHECK_ONCE, \OC\Files\Cache\Watcher::CHECK_ALWAYS
|
|
*/
|
|
public function getPolicy() {
|
|
return $this->watchPolicy;
|
|
}
|
|
|
|
/**
|
|
* check $path for updates and update if needed
|
|
*
|
|
* @param string $path
|
|
* @param ICacheEntry|null $cachedEntry
|
|
* @return boolean true if path was updated
|
|
*/
|
|
public function checkUpdate($path, $cachedEntry = null) {
|
|
if (is_null($cachedEntry)) {
|
|
$cachedEntry = $this->cache->get($path);
|
|
}
|
|
if ($cachedEntry === false || $this->needsUpdate($path, $cachedEntry)) {
|
|
$this->update($path, $cachedEntry);
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Update the cache for changes to $path
|
|
*
|
|
* @param string $path
|
|
* @param ICacheEntry $cachedData
|
|
*/
|
|
public function update($path, $cachedData) {
|
|
if ($this->storage->is_dir($path)) {
|
|
$this->scanner->scan($path, Scanner::SCAN_SHALLOW);
|
|
} else {
|
|
$this->scanner->scanFile($path);
|
|
}
|
|
if (is_array($cachedData) && $cachedData['mimetype'] === 'httpd/unix-directory') {
|
|
$this->cleanFolder($path);
|
|
}
|
|
if ($this->cache instanceof Cache) {
|
|
$this->cache->correctFolderSize($path);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check if the cache for $path needs to be updated
|
|
*
|
|
* @param string $path
|
|
* @param ICacheEntry $cachedData
|
|
* @return bool
|
|
*/
|
|
public function needsUpdate($path, $cachedData) {
|
|
if ($this->watchPolicy === self::CHECK_ALWAYS or ($this->watchPolicy === self::CHECK_ONCE and array_search($path, $this->checkedPaths) === false)) {
|
|
$this->checkedPaths[] = $path;
|
|
return $this->storage->hasUpdated($path, $cachedData['storage_mtime']);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* remove deleted files in $path from the cache
|
|
*
|
|
* @param string $path
|
|
*/
|
|
public function cleanFolder($path) {
|
|
$cachedContent = $this->cache->getFolderContents($path);
|
|
foreach ($cachedContent as $entry) {
|
|
if (!$this->storage->file_exists($entry['path'])) {
|
|
$this->cache->remove($entry['path']);
|
|
}
|
|
}
|
|
}
|
|
}
|