Add version collection to DAV

listed as
versions/<username>/versions/<file id>/<timastamp>

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

6 files changed, 431 insertions, 0 deletions

diff --git a/apps/files_versions/lib/AppInfo/Application.php b/apps/files_versions/lib/AppInfo/Application.php
index e09299c8bc8..4431fbf51bf 100644
--- a/apps/files_versions/lib/AppInfo/Application.php
+++ b/apps/files_versions/lib/AppInfo/Application.php
@@ -23,6 +23,7 @@
 
 namespace OCA\Files_Versions\AppInfo;
 
+use OCA\DAV\Connector\Sabre\Principal;
 use OCP\AppFramework\App;
 use OCA\Files_Versions\Expiration;
 use OCP\AppFramework\Utility\ITimeFactory;
@@ -48,5 +49,17 @@ 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_versions/lib/Sabre/RootCollection.php b/apps/files_versions/lib/Sabre/RootCollection.php
new file mode 100644
index 00000000000..397f1c55891
--- /dev/null
+++ b/apps/files_versions/lib/Sabre/RootCollection.php
@@ -0,0 +1,65 @@
+<?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_Versions\Sabre;
+
+use OCP\Files\IRootFolder;
+use Sabre\DAV\INode;
+use Sabre\DAVACL\AbstractPrincipalCollection;
+use Sabre\DAVACL\PrincipalBackend;
+
+class RootCollection extends AbstractPrincipalCollection {
+
+	/** @var IRootFolder */
+	private $rootFolder;
+
+	public function __construct(PrincipalBackend\BackendInterface $principalBackend,
+								IRootFolder $rootFolder) {
+		parent::__construct($principalBackend, 'principals/users');
+
+		$this->rootFolder = $rootFolder;
+	}
+
+	/**
+	 * 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 !== $user->getUID()) {
+			throw new \Sabre\DAV\Exception\Forbidden();
+		}
+		return new VersionHome($principalInfo, $this->rootFolder);
+	}
+
+	public function getName() {
+		return 'versions';
+	}
+
+}
diff --git a/apps/files_versions/lib/Sabre/VersionCollection.php b/apps/files_versions/lib/Sabre/VersionCollection.php
new file mode 100644
index 00000000000..a9c83fe475a
--- /dev/null
+++ b/apps/files_versions/lib/Sabre/VersionCollection.php
@@ -0,0 +1,94 @@
+<?php
+declare(strict_types=1);
+/**
+ * @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_Versions\Sabre;
+
+use OCA\Files_Versions\Storage;
+use OCP\Files\File;
+use OCP\Files\Folder;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\ICollection;
+
+class VersionCollection implements ICollection {
+	/** @var Folder */
+	private $userFolder;
+
+	/** @var File */
+	private $file;
+
+	/** @var string */
+	private $userId;
+
+	public function __construct(Folder $userFolder, File $file, string $userId) {
+		$this->userFolder = $userFolder;
+		$this->file = $file;
+		$this->userId = $userId;
+	}
+
+	public function createFile($name, $data = null) {
+		throw new Forbidden();
+	}
+
+	public function createDirectory($name) {
+		throw new Forbidden();
+	}
+
+	public function getChild($name) {
+
+		throw new NotFound();
+	}
+
+	public function getChildren(): array {
+		$versions = Storage::getVersions($this->userId, $this->userFolder->getRelativePath($this->file->getPath()));
+
+		return array_map(function (array $data) {
+			return new VersionFile($data);
+		}, $versions);
+	}
+
+	public function childExists($name): bool {
+		try {
+			$this->getChild($name);
+			return true;
+		} catch (NotFound $e) {
+			return false;
+		}
+	}
+
+	public function delete() {
+		throw new Forbidden();
+	}
+
+	public function getName(): string {
+		return (string)$this->file->getId();
+	}
+
+	public function setName($name) {
+		throw new Forbidden();
+	}
+
+	public function getLastModified(): int {
+		return 0;
+	}
+}
diff --git a/apps/files_versions/lib/Sabre/VersionFile.php b/apps/files_versions/lib/Sabre/VersionFile.php
new file mode 100644
index 00000000000..52bc9b4898b
--- /dev/null
+++ b/apps/files_versions/lib/Sabre/VersionFile.php
@@ -0,0 +1,73 @@
+<?php
+declare(strict_types=1);
+/**
+ * @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_Versions\Sabre;
+
+use OCP\Files\FileInfo;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\IFile;
+
+class VersionFile implements IFile {
+	/** @var array */
+	private $data;
+
+	public function __construct(array $data) {
+		$this->data = $data;
+	}
+
+	public function put($data) {
+		throw new Forbidden();
+	}
+
+	public function get() {
+		throw new Forbidden();
+	}
+
+	public function getContentType(): string {
+		return $this->data['mimetype'];
+	}
+
+	public function getETag(): string {
+		return $this->data['version'];
+	}
+
+	public function getSize(): int {
+		return $this->data['size'];
+	}
+
+	public function delete() {
+		throw new Forbidden();
+	}
+
+	public function getName(): string {
+		return $this->data['version'];
+	}
+
+	public function setName($name) {
+		throw new Forbidden();
+	}
+
+	public function getLastModified(): int {
+		return (int)$this->data['version'];
+	}
+}
diff --git a/apps/files_versions/lib/Sabre/VersionHome.php b/apps/files_versions/lib/Sabre/VersionHome.php
new file mode 100644
index 00000000000..8ad9345f25e
--- /dev/null
+++ b/apps/files_versions/lib/Sabre/VersionHome.php
@@ -0,0 +1,86 @@
+<?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_Versions\Sabre;
+
+use OCP\Files\IRootFolder;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\ICollection;
+
+class VersionHome implements ICollection {
+
+	/** @var array */
+	private $principalInfo;
+
+	/** @var IRootFolder */
+	private $rootFolder;
+
+	public function __construct(array $principalInfo, IRootFolder $rootFolder) {
+		$this->principalInfo = $principalInfo;
+		$this->rootFolder = $rootFolder;
+	}
+
+	public function delete() {
+		throw new Forbidden();
+	}
+
+	public function getName(): string {
+		list(,$name) = \Sabre\Uri\split($this->principalInfo['uri']);
+		return $name;
+	}
+
+	public function setName($name) {
+		throw new Forbidden();
+	}
+
+	public function createFile($name, $data = null) {
+		throw new Forbidden();
+	}
+
+	public function createDirectory($name) {
+		throw new Forbidden();
+	}
+
+	public function getChild($name) {
+		list(,$userId) = \Sabre\Uri\split($this->principalInfo['uri']);
+
+		if ($name === 'versions') {
+			return new VersionRoot($userId, $this->rootFolder);
+		}
+	}
+
+	public function getChildren() {
+		list(,$userId) = \Sabre\Uri\split($this->principalInfo['uri']);
+
+		return [
+			new VersionRoot($userId, $this->rootFolder),
+		];
+	}
+
+	public function childExists($name) {
+		return $name === 'versions' || $name === 'restore';
+	}
+
+	public function getLastModified() {
+		return 0;
+	}
+}
diff --git a/apps/files_versions/lib/Sabre/VersionRoot.php b/apps/files_versions/lib/Sabre/VersionRoot.php
new file mode 100644
index 00000000000..743b1c6ef1b
--- /dev/null
+++ b/apps/files_versions/lib/Sabre/VersionRoot.php
@@ -0,0 +1,100 @@
+<?php
+declare(strict_types=1);
+/**
+ * @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_Versions\Sabre;
+
+use OCP\Files\File;
+use OCP\Files\IRootFolder;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\ICollection;
+
+class VersionRoot implements ICollection {
+
+	/** @var string */
+	private $userId;
+
+	/** @var IRootFolder */
+	private $rootFolder;
+
+	public function __construct(string $userId, IRootFolder $rootFolder) {
+		$this->userId = $userId;
+		$this->rootFolder = $rootFolder;
+	}
+
+	public function delete() {
+		throw new Forbidden();
+	}
+
+	public function getName(): string {
+		return 'versions';
+	}
+
+	public function setName($name) {
+		throw new Forbidden();
+	}
+
+	public function createFile($name, $data = null) {
+		throw new Forbidden();
+	}
+
+	public function createDirectory($name) {
+		throw new Forbidden();
+	}
+
+	public function getChild($name) {
+		$userFolder = $this->rootFolder->getUserFolder($this->userId);
+
+		$fileId = (int)$name;
+		$nodes = $userFolder->getById($fileId);
+
+		if ($nodes === []) {
+			throw new NotFound();
+		}
+
+		$node = array_pop($nodes);
+
+		if (!$node instanceof File) {
+			throw new NotFound();
+		}
+
+		return new VersionCollection($userFolder, $node, $this->userId);
+	}
+
+	public function getChildren(): array {
+		return [];
+	}
+
+	public function childExists($name): bool {
+		try {
+			$this->getChild($name);
+			return true;
+		} catch (NotFound $e) {
+			return false;
+		}
+	}
+
+	public function getLastModified(): int {
+		return 0;
+	}
+}