List trashbin in DAV

First steps for #1332

* Add a new DAV collection
* List all files in the trashbin for this user
* Deleting files from trashbin
* Get files from trashbin (just read)

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

7 files changed, 557 insertions, 0 deletions

diff --git a/apps/files_trashbin/lib/AppInfo/Application.php b/apps/files_trashbin/lib/AppInfo/Application.php
index e9d4e6ecc1d..ea27c8c16ea 100644
--- a/apps/files_trashbin/lib/AppInfo/Application.php
+++ b/apps/files_trashbin/lib/AppInfo/Application.php
@@ -23,6 +23,7 @@
 
 namespace OCA\Files_Trashbin\AppInfo;
 
+use OCA\DAV\Connector\Sabre\Principal;
 use OCP\AppFramework\App;
 use OCA\Files_Trashbin\Expiration;
 use OCP\AppFramework\Utility\ITimeFactory;
@@ -47,5 +48,17 @@ class Application extends App {
 				$c->query(ITimeFactory::class)
 			);
 		});
+
+		/*
+		 * Register $principalBackend for the DAV collection
+		 */
+		$container->registerService('principalBackend', function () {
+			return new Principal(
+				\OC::$server->getUserManager(),
+				\OC::$server->getGroupManager(),
+				\OC::$server->getShareManager(),
+				\OC::$server->getUserSession()
+			);
+		});
 	}
 }
diff --git a/apps/files_trashbin/lib/Sabre/RootCollection.php b/apps/files_trashbin/lib/Sabre/RootCollection.php
new file mode 100644
index 00000000000..226fc33e58e
--- /dev/null
+++ b/apps/files_trashbin/lib/Sabre/RootCollection.php
@@ -0,0 +1,58 @@
+<?php
+/**
+ * @copyright 2018, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.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_Trashbin\Sabre;
+
+use Sabre\DAV\INode;
+use Sabre\DAVACL\AbstractPrincipalCollection;
+use Sabre\DAVACL\PrincipalBackend;
+
+class RootCollection extends AbstractPrincipalCollection {
+
+	public function __construct(PrincipalBackend\BackendInterface $principalBackend) {
+		parent::__construct($principalBackend, 'principals/users');
+	}
+
+	/**
+	 * This method returns a node for a principal.
+	 *
+	 * The passed array contains principal information, and is guaranteed to
+	 * at least contain a uri item. Other properties may or may not be
+	 * supplied by the authentication backend.
+	 *
+	 * @param array $principalInfo
+	 * @return INode
+	 */
+	public function getChildForPrincipal(array $principalInfo) {
+		list(,$name) = \Sabre\Uri\split($principalInfo['uri']);
+		$user = \OC::$server->getUserSession()->getUser();
+		if (is_null($user) || $name !== $user->getUID()) {
+			throw new \Sabre\DAV\Exception\Forbidden();
+		}
+		return new TrashHome($principalInfo);
+	}
+
+	public function getName() {
+		return 'trashbin';
+	}
+
+}
diff --git a/apps/files_trashbin/lib/Sabre/TrashFile.php b/apps/files_trashbin/lib/Sabre/TrashFile.php
new file mode 100644
index 00000000000..39b788a2e2c
--- /dev/null
+++ b/apps/files_trashbin/lib/Sabre/TrashFile.php
@@ -0,0 +1,77 @@
+<?php
+/**
+ * @copyright 2018, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.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_Trashbin\Sabre;
+
+use OCP\Files\FileInfo;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\IFile;
+
+class TrashFile implements IFile {
+	/** @var string */
+	private $userId;
+
+	/** @var FileInfo */
+	private $data;
+
+	public function __construct(string $userId, FileInfo $data) {
+		$this->userId = $userId;
+		$this->data = $data;
+	}
+
+	public function put($data) {
+		throw new Forbidden();
+	}
+
+	public function get() {
+		return $this->data->getStorage()->fopen($this->data->getInternalPath().'.d'.$this->getLastModified(), 'rb');
+	}
+
+	public function getContentType() {
+		return $this->data->getMimetype();
+	}
+
+	public function getETag() {
+		return $this->data->getEtag();
+	}
+
+	public function getSize() {
+		return $this->data->getSize();
+	}
+
+	public function delete() {
+		\OCA\Files_Trashbin\Trashbin::delete($this->data->getName(), $this->userId, $this->getLastModified());
+	}
+
+	public function getName() {
+		return $this->data->getName() . '.d' . $this->getLastModified();
+	}
+
+	public function setName($name) {
+		throw new Forbidden();
+	}
+
+	public function getLastModified() {
+		return $this->data->getMtime();
+	}
+
+}
diff --git a/apps/files_trashbin/lib/Sabre/TrashFolder.php b/apps/files_trashbin/lib/Sabre/TrashFolder.php
new file mode 100644
index 00000000000..2f97a73ebfd
--- /dev/null
+++ b/apps/files_trashbin/lib/Sabre/TrashFolder.php
@@ -0,0 +1,102 @@
+<?php
+/**
+ * @copyright 2018, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.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_Trashbin\Sabre;
+
+use OCP\Files\FileInfo;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\ICollection;
+
+class TrashFolder implements ICollection {
+	/** @var string */
+	private $userId;
+
+	/** @var FileInfo */
+	private $data;
+
+	public function __construct(string $root, string $userId, FileInfo $data) {
+		$this->userId = $userId;
+		$this->data = $data;
+	}
+
+	public function createFile($name, $data = null) {
+		throw new Forbidden();
+	}
+
+	public function createDirectory($name) {
+		throw new Forbidden();
+	}
+
+	public function getChild($name) {
+		$entries = \OCA\Files_Trashbin\Helper::getTrashFiles($this->getName(), $this->userId);
+
+		foreach ($entries as $entry) {
+			if ($entry->getName() === $name) {
+				if ($entry->getMimetype() === 'httpd/unix-directory') {
+					return new TrashFolderFolder($this->getName(), $this->userId, $entry);
+				}
+				return new TrashFolderFile($this->getName(), $this->userId, $entry);
+			}
+		}
+	}
+
+	public function getChildren() {
+		$entries = \OCA\Files_Trashbin\Helper::getTrashFiles($this->getName(), $this->userId);
+
+		$children = array_map(function (FileInfo $entry) {
+			if ($entry->getMimetype() === 'httpd/unix-directory') {
+				return new TrashFolderFolder($this->getName(), $this->userId, $entry);
+			}
+			return new TrashFolderFile($this->getName(), $this->userId, $entry);
+		}, $entries);
+
+		return $children;
+	}
+
+	public function childExists($name) {
+		$entries = \OCA\Files_Trashbin\Helper::getTrashFiles($this->getName(), $this->userId);
+
+		foreach ($entries as $entry) {
+			if ($entry->getName() === $name) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	public function delete() {
+		\OCA\Files_Trashbin\Trashbin::delete($this->data->getName(), $this->userId, $this->getLastModified());
+	}
+
+	public function getName() {
+		return $this->data->getName() . '.d' . $this->getLastModified();
+	}
+
+	public function setName($name) {
+		throw new Forbidden();
+	}
+
+	public function getLastModified() {
+		return $this->data->getMtime();
+	}
+}
diff --git a/apps/files_trashbin/lib/Sabre/TrashFolderFile.php b/apps/files_trashbin/lib/Sabre/TrashFolderFile.php
new file mode 100644
index 00000000000..5a9133f3adb
--- /dev/null
+++ b/apps/files_trashbin/lib/Sabre/TrashFolderFile.php
@@ -0,0 +1,81 @@
+<?php
+/**
+ * @copyright 2018, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.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_Trashbin\Sabre;
+
+use OCP\Files\FileInfo;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\IFile;
+
+class TrashFolderFile implements IFile {
+	/** @var string */
+	private $root;
+
+	/** @var string */
+	private $userId;
+
+	/** @var FileInfo */
+	private $data;
+
+	public function __construct(string $root, string $userId, FileInfo $data) {
+		$this->root = $root;
+		$this->userId = $userId;
+		$this->data = $data;
+	}
+
+	public function put($data) {
+		throw new Forbidden();
+	}
+
+	public function get() {
+		return $this->data->getStorage()->fopen($this->data->getInternalPath(), 'rb');
+	}
+
+	public function getContentType() {
+		return $this->data->getMimetype();
+	}
+
+	public function getETag() {
+		return $this->data->getEtag();
+	}
+
+	public function getSize() {
+		return $this->data->getSize();
+	}
+
+	public function delete() {
+		\OCA\Files_Trashbin\Trashbin::delete($this->root . '/' . $this->getName(), $this->userId, null);
+	}
+
+	public function getName() {
+		return $this->data->getName();
+	}
+
+	public function setName($name) {
+		throw new Forbidden();
+	}
+
+	public function getLastModified() {
+		return $this->data->getMtime();
+	}
+
+}
diff --git a/apps/files_trashbin/lib/Sabre/TrashFolderFolder.php b/apps/files_trashbin/lib/Sabre/TrashFolderFolder.php
new file mode 100644
index 00000000000..21c121c7d46
--- /dev/null
+++ b/apps/files_trashbin/lib/Sabre/TrashFolderFolder.php
@@ -0,0 +1,110 @@
+<?php
+/**
+ * @copyright 2018, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.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_Trashbin\Sabre;
+
+use OCP\Files\FileInfo;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\ICollection;
+
+class TrashFolderFolder implements ICollection {
+
+	/** @var string */
+	private $root;
+
+
+	/** @var string */
+	private $userId;
+
+	/** @var FileInfo */
+	private $data;
+
+	public function __construct(string $root, string $userId, FileInfo $data) {
+		$this->root = $root;
+		$this->userId = $userId;
+		$this->data = $data;
+	}
+
+	public function createFile($name, $data = null) {
+		throw new Forbidden();
+	}
+
+	public function createDirectory($name) {
+		throw new Forbidden();
+	}
+
+	public function getChild($name) {
+		$entries = \OCA\Files_Trashbin\Helper::getTrashFiles($this->root . '/' . $this->getName(), $this->userId);
+
+		foreach ($entries as $entry) {
+			if ($entry->getName() === $name) {
+				if ($entry->getMimetype() === 'httpd/unix-directory') {
+					return new TrashFolderFolder($this->root . '/' . $this->getName(), $this->userId, $entry);
+				}
+				return new TrashFolderFile($this->root . '/' . $this->getName(), $this->userId, $entry);
+			}
+		}
+	}
+
+	public function getChildren() {
+		$entries = \OCA\Files_Trashbin\Helper::getTrashFiles($this->root . '/' . $this->getName(), $this->userId);
+
+		$children = array_map(function (FileInfo $entry) {
+			if ($entry->getMimetype() === 'httpd/unix-directory') {
+				return new TrashFolderFolder($this->root.'/'.$this->getName(), $this->userId, $entry);
+			}
+			return new TrashFolderFile($this->root.'/'.$this->getName(), $this->userId, $entry);
+		}, $entries);
+
+		return $children;
+	}
+
+	public function childExists($name) {
+		$entries = \OCA\Files_Trashbin\Helper::getTrashFiles($this->root . '/' . $this->getName(), $this->userId);
+
+		foreach ($entries as $entry) {
+			if ($entry->getName() === $name) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	public function delete() {
+		\OCA\Files_Trashbin\Trashbin::delete($this->root . '/' . $this->getName(), $this->userId, null);
+	}
+
+	public function getName() {
+		return $this->data->getName();
+
+	}
+
+	public function setName($name) {
+		throw new Forbidden();
+	}
+
+	function getLastModified() {
+		return $this->data->getMtime();
+	}
+
+}
diff --git a/apps/files_trashbin/lib/Sabre/TrashHome.php b/apps/files_trashbin/lib/Sabre/TrashHome.php
new file mode 100644
index 00000000000..45a95ccea80
--- /dev/null
+++ b/apps/files_trashbin/lib/Sabre/TrashHome.php
@@ -0,0 +1,116 @@
+<?php
+/**
+ * @copyright 2018, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.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_Trashbin\Sabre;
+
+use OCP\Files\FileInfo;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\ICollection;
+
+class TrashHome implements ICollection {
+
+	/**
+	 * @var array
+	 */
+	private $principalInfo;
+
+	/**
+	 * FilesHome constructor.
+	 *
+	 * @param array $principalInfo
+	 */
+	public function __construct($principalInfo) {
+		$this->principalInfo = $principalInfo;
+	}
+
+	public function delete() {
+		throw new Forbidden('Permission denied to delete your trashbin');
+	}
+
+	public function getName(): string {
+		list(,$name) = \Sabre\Uri\split($this->principalInfo['uri']);
+		return $name;
+	}
+
+	public function setName($name) {
+		throw new Forbidden('Permission denied to rename this trashbin');
+	}
+
+	public function createFile($name, $data = null) {
+		throw new Forbidden('Not allowed to create files in the trashbin');
+	}
+
+	public function createDirectory($name) {
+		throw new Forbidden('Not allowed to create folders in the trashbin');
+	}
+
+	public function getChild($name) {
+		list(,$userId) = \Sabre\Uri\split($this->principalInfo['uri']);
+
+		$entries = \OCA\Files_Trashbin\Helper::getTrashFiles('/', $userId);
+
+		foreach ($entries as $entry) {
+			if ($entry->getName() . '.d'.$entry->getMtime() === $name) {
+				if ($entry->getMimetype() === 'httpd/unix-directory') {
+					return new TrashFolder('/', $userId, $entry);
+				}
+				return new TrashFile($userId, $entry);
+			}
+		}
+
+		throw new NotFound();
+	}
+
+	public function getChildren() {
+		list(,$userId) = \Sabre\Uri\split($this->principalInfo['uri']);
+
+		$entries = \OCA\Files_Trashbin\Helper::getTrashFiles('/', $userId);
+
+		$children = array_map(function (FileInfo $entry) use ($userId) {
+			if ($entry->getMimetype() === 'httpd/unix-directory') {
+				return new TrashFolder('/', $userId, $entry);
+			}
+			return new TrashFile($userId, $entry);
+		}, $entries);
+
+		return $children;
+	}
+
+	public function childExists($name) {
+		list(,$userId) = \Sabre\Uri\split($this->principalInfo['uri']);
+
+		$entries = \OCA\Files_Trashbin\Helper::getTrashFiles('/', $userId);
+
+		foreach ($entries as $entry) {
+			if ($entry->getName() . '.d'.$entry->getMtime() === $name) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	public function getLastModified() {
+		return 0;
+	}
+}