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<?php
/**
* @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
*
* @author Robin Appelman <robin@icewind.nl>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\Files_External\Lib\Notify;
use OC\Files\Notify\Change;
use OC\Files\Notify\RenameChange;
use OCP\Files\Notify\IChange;
use OCP\Files\Notify\INotifyHandler;
class SMBNotifyHandler implements INotifyHandler {
/**
* @var \Icewind\SMB\INotifyHandler
*/
private $shareNotifyHandler;
/**
* @var string
*/
private $root;
private $oldRenamePath = null;
/**
* SMBNotifyHandler constructor.
*
* @param \Icewind\SMB\INotifyHandler $shareNotifyHandler
* @param string $root
*/
public function __construct(\Icewind\SMB\INotifyHandler $shareNotifyHandler, $root) {
$this->shareNotifyHandler = $shareNotifyHandler;
$this->root = $root;
}
private function relativePath($fullPath) {
if ($fullPath === $this->root) {
return '';
} else if (substr($fullPath, 0, strlen($this->root)) === $this->root) {
return substr($fullPath, strlen($this->root));
} else {
return null;
}
}
public function listen(callable $callback) {
$oldRenamePath = null;
$this->shareNotifyHandler->listen(function (\Icewind\SMB\Change $shareChange) use ($callback) {
$change = $this->mapChange($shareChange);
if (!is_null($change)) {
return $callback($change);
} else {
return true;
}
});
}
/**
* Get all changes detected since the start of the notify process or the last call to getChanges
*
* @return IChange[]
*/
public function getChanges() {
$shareChanges = $this->shareNotifyHandler->getChanges();
$changes = [];
foreach ($shareChanges as $shareChange) {
$change = $this->mapChange($shareChange);
if ($change) {
$changes[] = $change;
}
}
return $changes;
}
/**
* Stop listening for changes
*
* Note that any pending changes will be discarded
*/
public function stop() {
$this->shareNotifyHandler->stop();
}
/**
* @param \Icewind\SMB\Change $change
* @return IChange|null
*/
private function mapChange(\Icewind\SMB\Change $change) {
$path = $this->relativePath($change->getPath());
if (is_null($path)) {
return null;
}
if ($change->getCode() === \Icewind\SMB\INotifyHandler::NOTIFY_RENAMED_OLD) {
$this->oldRenamePath = $path;
return null;
}
$type = $this->mapNotifyType($change->getCode());
if (is_null($type)) {
return null;
}
if ($type === IChange::RENAMED) {
if (!is_null($this->oldRenamePath)) {
$result = new RenameChange($type, $this->oldRenamePath, $path);
$this->oldRenamePath = null;
} else {
$result = null;
}
} else {
$result = new Change($type, $path);
}
return $result;
}
private function mapNotifyType($smbType) {
switch ($smbType) {
case \Icewind\SMB\INotifyHandler::NOTIFY_ADDED:
return IChange::ADDED;
case \Icewind\SMB\INotifyHandler::NOTIFY_REMOVED:
return IChange::REMOVED;
case \Icewind\SMB\INotifyHandler::NOTIFY_MODIFIED:
case \Icewind\SMB\INotifyHandler::NOTIFY_ADDED_STREAM:
case \Icewind\SMB\INotifyHandler::NOTIFY_MODIFIED_STREAM:
case \Icewind\SMB\INotifyHandler::NOTIFY_REMOVED_STREAM:
return IChange::MODIFIED;
case \Icewind\SMB\INotifyHandler::NOTIFY_RENAMED_NEW:
return IChange::RENAMED;
default:
return null;
}
}
}