From: Robin Appelman Date: Fri, 6 Jan 2017 14:39:01 +0000 (+0100) Subject: Add a more powerful notify mechanism X-Git-Tag: v12.0.0beta1~607^2~5 X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=269747985e1f17ab5cafa0ff02d811433683f7e8;p=nextcloud-server.git Add a more powerful notify mechanism Signed-off-by: Robin Appelman --- diff --git a/apps/files_external/lib/Lib/Notify/SMBNotifyHandler.php b/apps/files_external/lib/Lib/Notify/SMBNotifyHandler.php new file mode 100644 index 00000000000..9ac74b32ad8 --- /dev/null +++ b/apps/files_external/lib/Lib/Notify/SMBNotifyHandler.php @@ -0,0 +1,150 @@ + + * + * @author Robin Appelman + * + * @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 . + * + */ + +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 ($smbType) { + case \Icewind\SMB\INotifyHandler::NOTIFY_ADDED: + return IChange::ADDED; + case \Icewind\SMB\INotifyHandler::NOTIFY_REMOVED: + return IChange::REMOVED; + case \Icewind\SMB\INotifyHandler::NOTIFY_MODIFIED: + case \Icewind\SMB\INotifyHandler::NOTIFY_ADDED_STREAM: + case \Icewind\SMB\INotifyHandler::NOTIFY_MODIFIED_STREAM: + case \Icewind\SMB\INotifyHandler::NOTIFY_REMOVED_STREAM: + return IChange::MODIFIED; + case \Icewind\SMB\INotifyHandler::NOTIFY_RENAMED_NEW: + return IChange::RENAMED; + default: + return null; + } + } +} diff --git a/apps/files_external/lib/Lib/Storage/SMB.php b/apps/files_external/lib/Lib/Storage/SMB.php index 7ffc078df6f..c73288f8cc2 100644 --- a/apps/files_external/lib/Lib/Storage/SMB.php +++ b/apps/files_external/lib/Lib/Storage/SMB.php @@ -46,6 +46,9 @@ use Icewind\Streams\IteratorDirectory; use OC\Cache\CappedMemoryCache; use OC\Files\Filesystem; use OC\Files\Storage\Common; +use OCA\Files_External\Lib\Notify\SMBNotifyHandler; +use OCP\Files\Notify\IChange; +use OCP\Files\Notify\IRenameChange; use OCP\Files\Storage\INotifyStorage; use OCP\Files\StorageNotAvailableException; @@ -149,7 +152,7 @@ class SMB extends Common implements INotifyStorage { foreach ($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); } } diff --git a/lib/private/Files/Notify/Change.php b/lib/private/Files/Notify/Change.php new file mode 100644 index 00000000000..78cc007b27d --- /dev/null +++ b/lib/private/Files/Notify/Change.php @@ -0,0 +1,65 @@ + + * + * @author Robin Appelman + * + * @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 . + * + */ + +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; + } +} diff --git a/lib/private/Files/Notify/RenameChange.php b/lib/private/Files/Notify/RenameChange.php new file mode 100644 index 00000000000..b83dffa0cb2 --- /dev/null +++ b/lib/private/Files/Notify/RenameChange.php @@ -0,0 +1,52 @@ + + * + * @author Robin Appelman + * + * @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 . + * + */ + +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; + } +} diff --git a/lib/public/Files/Notify/IChange.php b/lib/public/Files/Notify/IChange.php new file mode 100644 index 00000000000..09d9500a3de --- /dev/null +++ b/lib/public/Files/Notify/IChange.php @@ -0,0 +1,47 @@ + + * + * @author Robin Appelman + * + * @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 . + * + */ + +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(); +} diff --git a/lib/public/Files/Notify/INotifyHandler.php b/lib/public/Files/Notify/INotifyHandler.php new file mode 100644 index 00000000000..be672426a06 --- /dev/null +++ b/lib/public/Files/Notify/INotifyHandler.php @@ -0,0 +1,52 @@ + + * + * @author Robin Appelman + * + * @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 . + * + */ + +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(); +} diff --git a/lib/public/Files/Notify/IRenameChange.php b/lib/public/Files/Notify/IRenameChange.php new file mode 100644 index 00000000000..710a8acf0f2 --- /dev/null +++ b/lib/public/Files/Notify/IRenameChange.php @@ -0,0 +1,33 @@ + + * + * @author Robin Appelman + * + * @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 . + * + */ + +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(); +} diff --git a/lib/public/Files/Storage/INotifyStorage.php b/lib/public/Files/Storage/INotifyStorage.php index e99124abdfd..c6fdd44724f 100644 --- a/lib/public/Files/Storage/INotifyStorage.php +++ b/lib/public/Files/Storage/INotifyStorage.php @@ -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); }