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261 lines
6.9 KiB
261 lines
6.9 KiB
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Björn Schießle <bjoern@schiessle.org>
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Daniel Jagszent <daniel@jagszent.de>
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* @author Michael Gapczynski <GapczynskiM@gmail.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Vincent Petry <pvince81@owncloud.com>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\Files\Cache;
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use OC\Files\FileInfo;
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use OCP\Files\Cache\ICacheEntry;
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use OCP\Files\Cache\IUpdater;
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use OCP\Files\Storage\IStorage;
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/**
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* Update the cache and propagate changes
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*
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*/
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class Updater implements IUpdater {
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/**
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* @var bool
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*/
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protected $enabled = true;
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/**
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* @var \OC\Files\Storage\Storage
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*/
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protected $storage;
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/**
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* @var \OC\Files\Cache\Propagator
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*/
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protected $propagator;
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/**
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* @var Scanner
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*/
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protected $scanner;
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/**
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* @var Cache
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*/
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protected $cache;
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/**
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* @param \OC\Files\Storage\Storage $storage
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*/
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public function __construct(\OC\Files\Storage\Storage $storage) {
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$this->storage = $storage;
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$this->propagator = $storage->getPropagator();
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$this->scanner = $storage->getScanner();
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$this->cache = $storage->getCache();
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}
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/**
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* Disable updating the cache trough this updater
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*/
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public function disable() {
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$this->enabled = false;
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}
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/**
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* Re-enable the updating of the cache trough this updater
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*/
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public function enable() {
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$this->enabled = true;
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}
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/**
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* Get the propagator for etags and mtime for the view the updater works on
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*
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* @return Propagator
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*/
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public function getPropagator() {
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return $this->propagator;
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}
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/**
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* Propagate etag and mtime changes for the parent folders of $path up to the root of the filesystem
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*
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* @param string $path the path of the file to propagate the changes for
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* @param int|null $time the timestamp to set as mtime for the parent folders, if left out the current time is used
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*/
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public function propagate($path, $time = null) {
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if (Scanner::isPartialFile($path)) {
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return;
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}
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$this->propagator->propagateChange($path, $time);
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}
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/**
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* Update the cache for $path and update the size, etag and mtime of the parent folders
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*
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* @param string $path
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* @param int $time
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*/
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public function update($path, $time = null) {
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if (!$this->enabled or Scanner::isPartialFile($path)) {
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return;
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}
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if (is_null($time)) {
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$time = time();
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}
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$data = $this->scanner->scan($path, Scanner::SCAN_SHALLOW, -1, false);
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if (
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isset($data['oldSize']) && isset($data['size']) &&
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!$data['encrypted'] // encryption is a pita and touches the cache itself
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) {
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$sizeDifference = $data['size'] - $data['oldSize'];
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} else {
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// scanner didn't provide size info, fallback to full size calculation
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$sizeDifference = 0;
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if ($this->cache instanceof Cache) {
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$this->cache->correctFolderSize($path, $data);
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}
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}
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$this->correctParentStorageMtime($path);
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$this->propagator->propagateChange($path, $time, $sizeDifference);
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}
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/**
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* Remove $path from the cache and update the size, etag and mtime of the parent folders
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*
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* @param string $path
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*/
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public function remove($path) {
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if (!$this->enabled or Scanner::isPartialFile($path)) {
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return;
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}
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$parent = dirname($path);
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if ($parent === '.') {
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$parent = '';
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}
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$entry = $this->cache->get($path);
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$this->cache->remove($path);
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$this->correctParentStorageMtime($path);
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if ($entry instanceof ICacheEntry) {
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$this->propagator->propagateChange($path, time(), -$entry->getSize());
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} else {
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$this->propagator->propagateChange($path, time());
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if ($this->cache instanceof Cache) {
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$this->cache->correctFolderSize($parent);
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}
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}
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}
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/**
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* Rename a file or folder in the cache and update the size, etag and mtime of the parent folders
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*
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* @param IStorage $sourceStorage
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* @param string $source
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* @param string $target
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*/
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public function renameFromStorage(IStorage $sourceStorage, $source, $target) {
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if (!$this->enabled or Scanner::isPartialFile($source) or Scanner::isPartialFile($target)) {
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return;
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}
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$time = time();
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$sourceCache = $sourceStorage->getCache();
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$sourceUpdater = $sourceStorage->getUpdater();
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$sourcePropagator = $sourceStorage->getPropagator();
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$sourceInfo = $sourceCache->get($source);
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if ($sourceInfo !== false) {
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if ($this->cache->inCache($target)) {
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$this->cache->remove($target);
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}
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if ($sourceStorage === $this->storage) {
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$this->cache->move($source, $target);
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} else {
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$this->cache->moveFromCache($sourceCache, $source, $target);
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}
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$sourceExtension = pathinfo($source, PATHINFO_EXTENSION);
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$targetExtension = pathinfo($target, PATHINFO_EXTENSION);
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$targetIsTrash = preg_match("/d\d+/", $targetExtension);
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if ($sourceExtension !== $targetExtension && $sourceInfo->getMimeType() !== FileInfo::MIMETYPE_FOLDER && !$targetIsTrash) {
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// handle mime type change
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$mimeType = $this->storage->getMimeType($target);
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$fileId = $this->cache->getId($target);
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$this->cache->update($fileId, ['mimetype' => $mimeType]);
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}
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}
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if ($sourceCache instanceof Cache) {
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$sourceCache->correctFolderSize($source);
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}
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if ($this->cache instanceof Cache) {
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$this->cache->correctFolderSize($target);
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}
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if ($sourceUpdater instanceof Updater) {
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$sourceUpdater->correctParentStorageMtime($source);
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}
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$this->correctParentStorageMtime($target);
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$this->updateStorageMTimeOnly($target);
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$sourcePropagator->propagateChange($source, $time);
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$this->propagator->propagateChange($target, $time);
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}
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private function updateStorageMTimeOnly($internalPath) {
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$fileId = $this->cache->getId($internalPath);
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if ($fileId !== -1) {
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$mtime = $this->storage->filemtime($internalPath);
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if ($mtime !== false) {
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$this->cache->update(
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$fileId, [
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'mtime' => null, // this magic tells it to not overwrite mtime
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'storage_mtime' => $mtime
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]
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);
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}
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}
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}
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/**
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* update the storage_mtime of the direct parent in the cache to the mtime from the storage
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*
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* @param string $internalPath
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*/
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private function correctParentStorageMtime($internalPath) {
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$parentId = $this->cache->getParentId($internalPath);
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$parent = dirname($internalPath);
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if ($parentId != -1) {
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$mtime = $this->storage->filemtime($parent);
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if ($mtime !== false) {
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$this->cache->update($parentId, ['storage_mtime' => $mtime]);
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}
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}
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}
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}
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