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<?php
/**
* SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OC\Files\Storage\Wrapper;
use OCP\Cache\CappedMemoryCache;
use OCP\Files\Storage\IStorage;
use Psr\Clock\ClockInterface;
/**
* Wrapper that overwrites the mtime return by stat/getMetaData if the returned value
* is lower than when we last modified the file.
*
* This is useful because some storage servers can return an outdated mtime right after writes
*/
class KnownMtime extends Wrapper {
private CappedMemoryCache $knowMtimes;
private ClockInterface $clock;
public function __construct($arguments) {
parent::__construct($arguments);
$this->knowMtimes = new CappedMemoryCache();
$this->clock = $arguments['clock'];
}
public function file_put_contents(string $path, mixed $data): int|float|false {
$result = parent::file_put_contents($path, $data);
if ($result) {
$now = $this->clock->now()->getTimestamp();
$this->knowMtimes->set($path, $this->clock->now()->getTimestamp());
}
return $result;
}
public function stat(string $path): array|false {
$stat = parent::stat($path);
if ($stat) {
$this->applyKnownMtime($path, $stat);
}
return $stat;
}
public function getMetaData(string $path): ?array {
$stat = parent::getMetaData($path);
if ($stat) {
$this->applyKnownMtime($path, $stat);
}
return $stat;
}
private function applyKnownMtime(string $path, array &$stat): void {
if (isset($stat['mtime'])) {
$knownMtime = $this->knowMtimes->get($path) ?? 0;
$stat['mtime'] = max($stat['mtime'], $knownMtime);
}
}
public function filemtime(string $path): int|false {
$knownMtime = $this->knowMtimes->get($path) ?? 0;
return max(parent::filemtime($path), $knownMtime);
}
public function mkdir(string $path): bool {
$result = parent::mkdir($path);
if ($result) {
$this->knowMtimes->set($path, $this->clock->now()->getTimestamp());
}
return $result;
}
public function rmdir(string $path): bool {
$result = parent::rmdir($path);
if ($result) {
$this->knowMtimes->set($path, $this->clock->now()->getTimestamp());
}
return $result;
}
public function unlink(string $path): bool {
$result = parent::unlink($path);
if ($result) {
$this->knowMtimes->set($path, $this->clock->now()->getTimestamp());
}
return $result;
}
public function rename(string $source, string $target): bool {
$result = parent::rename($source, $target);
if ($result) {
$this->knowMtimes->set($target, $this->clock->now()->getTimestamp());
$this->knowMtimes->set($source, $this->clock->now()->getTimestamp());
}
return $result;
}
public function copy(string $source, string $target): bool {
$result = parent::copy($source, $target);
if ($result) {
$this->knowMtimes->set($target, $this->clock->now()->getTimestamp());
}
return $result;
}
public function fopen(string $path, string $mode) {
$result = parent::fopen($path, $mode);
if ($result && $mode === 'w') {
$this->knowMtimes->set($path, $this->clock->now()->getTimestamp());
}
return $result;
}
public function touch(string $path, ?int $mtime = null): bool {
$result = parent::touch($path, $mtime);
if ($result) {
$this->knowMtimes->set($path, $mtime ?? $this->clock->now()->getTimestamp());
}
return $result;
}
public function copyFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath): bool {
$result = parent::copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
if ($result) {
$this->knowMtimes->set($targetInternalPath, $this->clock->now()->getTimestamp());
}
return $result;
}
public function moveFromStorage(IStorage $sourceStorage, string $sourceInternalPath, string $targetInternalPath): bool {
$result = parent::moveFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
if ($result) {
$this->knowMtimes->set($targetInternalPath, $this->clock->now()->getTimestamp());
}
return $result;
}
public function writeStream(string $path, $stream, ?int $size = null): int {
$result = parent::writeStream($path, $stream, $size);
if ($result) {
$this->knowMtimes->set($path, $this->clock->now()->getTimestamp());
}
return $result;
}
}
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