allow apps to control the trash bin

Signed-off-by: Bjoern Schiessle <bjoern@schiessle.org>

2 files changed, 117 insertions, 2 deletions

diff --git a/apps/files_trashbin/lib/Events/MoveToTrashEvent.php b/apps/files_trashbin/lib/Events/MoveToTrashEvent.php
new file mode 100644
index 00000000000..185f39f63cb
--- /dev/null
+++ b/apps/files_trashbin/lib/Events/MoveToTrashEvent.php
@@ -0,0 +1,73 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Bjoern Schiessle <bjoern@schiessle.org>
+ *
+ * @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_Trashbin\Events;
+
+
+use OCP\Files\Node;
+use Symfony\Component\EventDispatcher\Event;
+
+/**
+ * Class MoveToTrashEvent
+ *
+ * Event to allow other apps to disable the trash bin for specific files
+ *
+ * @package OCA\Files_Trashbin\Events
+ */
+class MoveToTrashEvent extends Event {
+
+	/** @var bool */
+	private $moveToTrashBin;
+
+	/** @var Node */
+	private $node;
+
+	public function __construct(Node $node) {
+		$this->moveToTrashBin = true;
+		$this->node = $node;
+	}
+
+	/**
+	 * get Node which will be deleted
+	 *
+	 * @return Node
+	 */
+	public function getNode() {
+		return $this->node;
+	}
+
+	/**
+	 * disable trash bin for this operation
+	 */
+	public function disableTrashBin() {
+		$this->moveToTrashBin = false;
+	}
+
+	/**
+	 * should the file be moved to the trash bin?
+	 *
+	 * @return bool
+	 */
+	public function shouldMoveToTrashBin() {
+		return $this->moveToTrashBin;
+	}
+}
diff --git a/apps/files_trashbin/lib/Storage.php b/apps/files_trashbin/lib/Storage.php
index fdc7081b137..cb36b4604c1 100644
--- a/apps/files_trashbin/lib/Storage.php
+++ b/apps/files_trashbin/lib/Storage.php
@@ -28,9 +28,13 @@ namespace OCA\Files_Trashbin;
 use OC\Files\Filesystem;
 use OC\Files\Storage\Wrapper\Wrapper;
 use OC\Files\View;
+use OCA\Files_Trashbin\Events\MoveToTrashEvent;
 use OCP\Encryption\Exceptions\GenericEncryptionException;
+use OCP\Files\IRootFolder;
+use OCP\Files\Node;
 use OCP\ILogger;
 use OCP\IUserManager;
+use Symfony\Component\EventDispatcher\EventDispatcher;
 
 class Storage extends Wrapper {
 
@@ -60,18 +64,31 @@ class Storage extends Wrapper {
 	/** @var ILogger */
 	private $logger;
 
+	/** @var EventDispatcher */
+	private $eventDispatcher;
+
+	/** @var IRootFolder */
+	private $rootFolder;
+
 	/**
 	 * Storage constructor.
 	 *
 	 * @param array $parameters
 	 * @param IUserManager|null $userManager
+	 * @param ILogger|null $logger
+	 * @param EventDispatcher|null $eventDispatcher
+	 * @param IRootFolder|null $rootFolder
 	 */
 	public function __construct($parameters,
 								IUserManager $userManager = null,
-								ILogger $logger = null) {
+								ILogger $logger = null,
+								EventDispatcher $eventDispatcher = null,
+								IRootFolder $rootFolder = null) {
 		$this->mountPoint = $parameters['mountPoint'];
 		$this->userManager = $userManager;
 		$this->logger = $logger;
+		$this->eventDispatcher = $eventDispatcher;
+		$this->rootFolder = $rootFolder;
 		parent::__construct($parameters);
 	}
 
@@ -200,6 +217,18 @@ class Storage extends Wrapper {
 	 * @return bool
 	 */
 	protected function shouldMoveToTrash($path){
+
+		// check if there is a app which want to disable the trash bin for this file
+		$fileId = $this->storage->getCache()->getId($path);
+		$nodes = $this->rootFolder->getById($fileId);
+		foreach ($nodes as $node) {
+			$event = $this->createMoveToTrashEvent($node);
+			$this->eventDispatcher->dispatch('OCA\Files_Trashbin::moveToTrash', $event);
+			if ($event->shouldMoveToTrashBin() === false) {
+				return false;
+			}
+		}
+
 		$normalized = Filesystem::normalizePath($this->mountPoint . '/' . $path);
 		$parts = explode('/', $normalized);
 		if (count($parts) < 4) {
@@ -214,6 +243,17 @@ class Storage extends Wrapper {
 	}
 
 	/**
+	 * get move to trash event
+	 *
+	 * @param Node $node
+	 * @return MoveToTrashEvent
+	 */
+	protected function createMoveToTrashEvent(Node $node) {
+		$event = new MoveToTrashEvent($node);
+		return $event;
+	}
+
+	/**
 	 * Run the delete operation with the given method
 	 *
 	 * @param string $path path of file or folder to delete
@@ -269,7 +309,9 @@ class Storage extends Wrapper {
 			return new \OCA\Files_Trashbin\Storage(
 				array('storage' => $storage, 'mountPoint' => $mountPoint),
 				\OC::$server->getUserManager(),
-				\OC::$server->getLogger()
+				\OC::$server->getLogger(),
+				\OC::$server->getEventDispatcher(),
+				\OC::$server->getLazyRootFolder()
 			);
 		}, 1);
 	}