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Add a more powerful notify mechanism 

Signed-off-by: Robin Appelman <robin@icewind.nl>
This commit is contained in:
Robin Appelman 2017-01-06 15:39:01 +01:00
parent 0aa211eefb
commit 269747985e
No known key found for this signature in database
GPG Key ID: 50F2B59C6DEBBCFE
8 changed files with 423 additions and 39 deletions
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150
apps/files_external/lib/Lib/Notify/SMBNotifyHandler.php Normal file
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@ -0,0 +1,150 @@
<?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;
}
}
}

50
apps/files_external/lib/Lib/Storage/SMB.php
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@ -46,6 +46,9 @@ use Icewind\Streams\IteratorDirectory;
use OC\Cache\CappedMemoryCache;
use OC\Files\Filesystem;
use OC\Files\Storage\Common;
use OCA\Files_External\Lib\Notify\SMBNotifyHandler;
use OCP\Files\Notify\IChange;
use OCP\Files\Notify\IRenameChange;
use OCP\Files\Storage\INotifyStorage;
use OCP\Files\StorageNotAvailableException;
@ -149,7 +152,7 @@ class SMB extends Common implements INotifyStorage {
foreach ($files as $file) {
$this->statCache[$path . '/' . $file->getName()] = $file;
}
return array_filter($files, function(IFileInfo $file) {
return array_filter($files, function (IFileInfo $file) {
return !$file->isHidden();
});
} catch (ConnectException $e) {
@ -486,48 +489,17 @@ class SMB extends Common implements INotifyStorage {
}
public function listen($path, callable $callback) {
$fullPath = $this->buildPath($path);
$oldRenamePath = null;
$this->share->notify($fullPath)->listen(function (Change $change) use (&$oldRenamePath, $callback) {
$path = $this->relativePath($change->getPath());
if (is_null($path)) {
return true;
}
if ($change->getCode() === INotifyHandler::NOTIFY_RENAMED_OLD) {
$oldRenamePath = $path;
return true;
}
$type = $this->mapNotifyType($change->getCode());
if (is_null($type)) {
return true;
}
if ($type === INotifyStorage::NOTIFY_RENAMED) {
if (!is_null($oldRenamePath)) {
$result = $callback($type, $oldRenamePath, $path);
$oldRenamePath = null;
}
$this->notify($path)->listen(function (IChange $change) use ($callback) {
if ($change instanceof IRenameChange) {
return $callback($change->getType(), $change->getPath(), $change->getTargetPath());
} else {
$result = $callback($type, $path);
return $callback($change->getType(), $change->getPath());
}
return $result;
});
}
private function mapNotifyType($smbType) {
switch ($smbType) {
case INotifyHandler::NOTIFY_ADDED:
return INotifyStorage::NOTIFY_ADDED;
case INotifyHandler::NOTIFY_REMOVED:
return INotifyStorage::NOTIFY_REMOVED;
case INotifyHandler::NOTIFY_MODIFIED:
case INotifyHandler::NOTIFY_ADDED_STREAM:
case INotifyHandler::NOTIFY_MODIFIED_STREAM:
case INotifyHandler::NOTIFY_REMOVED_STREAM:
return INotifyStorage::NOTIFY_MODIFIED;
case INotifyHandler::NOTIFY_RENAMED_NEW:
return INotifyStorage::NOTIFY_RENAMED;
default:
return null;
}
public function notify($path) {
$shareNotifyHandler = $this->share->notify($this->buildPath($path));
return new SMBNotifyHandler($shareNotifyHandler, $this->root);
}
}

65
lib/private/Files/Notify/Change.php Normal file
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@ -0,0 +1,65 @@
<?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 OC\Files\Notify;
use OCP\Files\Notify\IChange;
class Change implements IChange {
/** @var int */
private $type;
/** @var string */
private $path;
/**
* Change constructor.
*
* @param int $type
* @param string $path
*/
public function __construct($type, $path) {
$this->type = $type;
$this->path = $path;
}
/**
* Get the type of the change
*
* @return int IChange::ADDED, IChange::REMOVED, IChange::MODIFIED or IChange::RENAMED
*/
public function getType() {
return $this->type;
}
/**
* Get the path of the file that was changed relative to the root of the storage
*
* Note, for rename changes this path is the old path for the file
*
* @return mixed
*/
public function getPath() {
return $this->path;
}
}

52
lib/private/Files/Notify/RenameChange.php Normal file
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@ -0,0 +1,52 @@
<?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 OC\Files\Notify;
use OCP\Files\Notify\IRenameChange;
class RenameChange extends Change implements IRenameChange {
/** @var string */
private $targetPath;
/**
* Change constructor.
*
* @param int $type
* @param string $path
* @param string $targetPath
*/
public function __construct($type, $path, $targetPath) {
parent::__construct($type, $path);
$this->targetPath = $targetPath;
}
/**
* Get the new path of the renamed file relative to the storage root
*
* @return string
*/
public function getTargetPath() {
return $this->targetPath;
}
}

47
lib/public/Files/Notify/IChange.php Normal file
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@ -0,0 +1,47 @@
<?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 OCP\Files\Notify;
interface IChange {
const ADDED = 1;
const REMOVED = 2;
const MODIFIED = 3;
const RENAMED = 4;
/**
* Get the type of the change
*
* @return int IChange::ADDED, IChange::REMOVED, IChange::MODIFIED or IChange::RENAMED
*/
public function getType();
/**
* Get the path of the file that was changed relative to the root of the storage
*
* Note, for rename changes this path is the old path for the file
*
* @return mixed
*/
public function getPath();
}

52
lib/public/Files/Notify/INotifyHandler.php Normal file
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@ -0,0 +1,52 @@
<?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 OCP\Files\Notify;
interface INotifyHandler {
/**
* Start listening for update notifications
*
* The provided callback will be called for every incoming notification with the following parameters
* - IChange|IRenameChange $change
*
* Note that this call is blocking and will not exit on it's own, to stop listening for notifications return `false` from the callback
*
* @param callable $callback
*/
public function listen(callable $callback);
/**
* Get all changes detected since the start of the notify process or the last call to getChanges
*
* @return IChange[]
*/
public function getChanges();
/**
* Stop listening for changes
*
* Note that any pending changes will be discarded
*/
public function stop();
}

33
lib/public/Files/Notify/IRenameChange.php Normal file
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@ -0,0 +1,33 @@
<?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 OCP\Files\Notify;
interface IRenameChange extends IChange {
/**
* Get the new path of the renamed file relative to the storage root
*
* @return string
*/
public function getTargetPath();
}

13
lib/public/Files/Storage/INotifyStorage.php
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@ -23,6 +23,8 @@
namespace OCP\Files\Storage;
use OCP\Files\Notify\INotifyHandler;
/**
* Storage backend that support active notifications
*
@ -48,6 +50,17 @@ interface INotifyStorage {
* @param callable $callback
*
* @since 9.1.0
* @deprecated 12.0.0 use INotifyStorage::notify()->listen() instead
*/
public function listen($path, callable $callback);
/**
* Start the notification handler for this storage
*
* @param $path
* @return INotifyHandler
*
* @since 12.0.0
*/
public function notify($path);
}