Add public-files to DAV including ACL handling

apps/dav/lib/DAV/PublicAuth.php

@@ -35,6 +35,7 @@ class PublicAuth implements BackendInterface {
 	public function __construct() {
 		$this->publicURLs = [
 			'public-calendars',
+			'public-files',
 			'principals/system/public'
 		];
 	}

apps/dav/lib/Files/PublicFiles/RootCollection.php

@@ -0,0 +1,88 @@
+<?php
+/**
+ * @author Thomas Müller <[email protected]>
+ *
+ * @copyright Copyright (c) 2017, ownCloud GmbH
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\DAV\Files\PublicFiles;
+
+use OC\Share\Constants;
+use OCP\Share\Exceptions\ShareNotFound;
+use OCP\Share\IManager;
+use OCP\Share\IShare;
+use Sabre\DAV\Collection;
+use Sabre\DAV\Exception\MethodNotAllowed;
+use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\SimpleCollection;
+use Sabre\DAV\SimpleFile;
+
+class RootCollection extends Collection {
+
+	/** @var IManager */
+	private $shareManager;
+	/** @var \OCP\IL10N */
+	protected $l10n;
+
+	/**
+	 * If this value is set to true, it effectively disables listing of users
+	 * it still allows user to find other users if they have an exact url.
+	 *
+	 * @var bool
+	 */
+	public $disableListing = false;
+
+	function __construct() {
+		$this->l10n = \OC::$server->getL10N('dav');
+		$this->shareManager = \OC::$server->getShareManager();
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	function getName() {
+		return 'public-files';
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	function getChild($name) {
+		try {
+			$share = $this->shareManager->getShareByToken($name);
+			$password = $share->getPassword();
+			// TODO: check password
+			return new ShareNode($share);
+		} catch (ShareNotFound $ex) {
+			throw new NotFound();
+		}
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	function getChildren() {
+		if ($this->disableListing) {
+			throw new MethodNotAllowed('Listing members of this collection is disabled');
+		}
+
+		$shares = $this->shareManager->getAllSharedWith(null, [Constants::SHARE_TYPE_LINK]);
+		return array_map(function(IShare $share) {
+			return new ShareNode($share);
+		}, $shares);
+	}
+}

apps/dav/lib/Files/PublicFiles/ShareNode.php

@@ -0,0 +1,55 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: deepdiver
+ * Date: 26.10.17
+ * Time: 14:40
+ */
+
+namespace OCA\DAV\Files\PublicFiles;
+
+
+use OCP\Files\FileInfo;
+use OCP\Files\Node;
+use OCP\Share\IShare;
+use Sabre\DAV\Collection;
+use Sabre\DAV\INode;
+
+class ShareNode extends Collection {
+
+	/** @var IShare */
+	private $share;
+
+	public function __construct(IShare $share) {
+		$this->share = $share;
+	}
+	/**
+	 * Returns an array with all the child nodes
+	 *
+	 * @return INode[]
+	 */
+	function getChildren() {
+		if ($this->share->getNodeType() === 'folder') {
+			$nodes = $this->share->getNode()->getDirectoryListing();
+		} else {
+			$nodes = [$this->share->getNode()];
+		}
+		return array_map(function(Node $node) {
+			if ($node->getType() === FileInfo::TYPE_FOLDER) {
+				return new SharedFolder($node, $this->share);
+			}
+			return new SharedFile($node, $this->share);
+		}, $nodes);
+	}
+
+	/**
+	 * Returns the name of the node.
+	 *
+	 * This is used to generate the url.
+	 *
+	 * @return string
+	 */
+	function getName() {
+		return $this->share->getToken();
+	}
+}

apps/dav/lib/Files/PublicFiles/SharedFile.php

@@ -0,0 +1,104 @@
+<?php
+/**
+ * @author Thomas Müller <[email protected]>
+ *
+ * @copyright Copyright (c) 2017, ownCloud GmbH
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+
+namespace OCA\DAV\Files\PublicFiles;
+
+
+use OCP\Share\IShare;
+use Sabre\DAV\File;
+use Sabre\DAVACL\ACLTrait;
+use Sabre\DAVACL\IACL;
+
+/**
+ * Class MetaFile
+ * This is a Sabre based implementation of a file living in the /meta resource.
+ *
+ * @package OCA\DAV\Meta
+ */
+class SharedFile extends File implements IACL {
+
+	use ACLTrait;
+
+	/** @var \OCP\Files\File */
+	private $file;
+
+	/**
+	 * MetaFolder constructor.
+	 *
+	 * @param \OCP\Files\File $file
+	 * @param IShare $share
+	 */
+	public function __construct(\OCP\Files\File $file, IShare $share) {
+		$this->file = $file;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	function getName() {
+		return $this->file->getName();
+	}
+
+	public function getSize() {
+		return $this->file->getSize();
+	}
+
+	public function getContentType() {
+		return $this->file->getMimeType();
+	}
+
+	public function getETag() {
+		return $this->file->getETag();
+	}
+
+	function getLastModified() {
+		return $this->file->getMTime();
+	}
+
+	function delete() {
+		// TODO: check permissions - via ACL?
+		$this->file->delete();
+	}
+
+//	function setName($name) {
+//		$this->file->setName($name);
+//	}
+
+	function getOwner() {
+		return '';
+	}
+
+	function getACL() {
+		return [
+			[
+				'privilege' => '{DAV:}all',
+				'principal' => '{DAV:}owner',
+				'protected' => true,
+			],
+			[
+				'privilege' => '{DAV:}read',
+				'principal' => 'principals/system/public',
+				'protected' => true,
+			]
+		];
+	}
+}

apps/dav/lib/Files/PublicFiles/SharedFolder.php

@@ -0,0 +1,128 @@
+<?php
+/**
+ * @author Thomas Müller <[email protected]>
+ *
+ * @copyright Copyright (c) 2017, ownCloud GmbH
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+
+namespace OCA\DAV\Files\PublicFiles;
+
+
+use OCP\Constants;
+use OCP\Files\File;
+use OCP\Files\Folder;
+use OCP\Files\Node;
+use OCP\Share\IShare;
+use Sabre\DAV\Collection;
+use Sabre\DAVACL\ACLTrait;
+use Sabre\DAVACL\IACL;
+
+/**
+ * Class MetaFolder
+ * This is a Sabre based implementation of a folder living in the /meta resource.
+ *
+ * @package OCA\DAV\Meta
+ */
+class SharedFolder extends Collection implements IACL {
+	use ACLTrait;
+
+	/** @var Folder */
+	private $folder;
+	/** @var IShare */
+	private $share;
+
+	/**
+	 * MetaFolder constructor.
+	 *
+	 * @param Folder $folder
+	 */
+	public function __construct(Folder $folder, IShare $share) {
+		$this->folder = $folder;
+		$this->share = $share;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	function getChildren() {
+		$nodes = $this->folder->getDirectoryListing();
+		return array_map(function($node) {
+			return $this->nodeFactory($node);
+		}, $nodes);
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	function getName() {
+		return $this->folder->getName();
+	}
+
+	function getLastModified() {
+		return $this->folder->getMTime();
+	}
+
+	function createDirectory($name) {
+		$this->folder->newFolder($name);
+	}
+
+	function createFile($name, $data = null) {
+		$file = $this->folder->newFile($name);
+		$file->putContent($data);
+
+	}
+
+	private function nodeFactory(Node $node) {
+		if ($node instanceof Folder) {
+			return new SharedFolder($node, $this->share);
+		}
+		if ($node instanceof File) {
+			return new SharedFile($node, $this->share);
+		}
+		throw new \InvalidArgumentException();
+	}
+
+	function getACL() {
+		$acl = [
+			[
+				'privilege' => '{DAV:}all',
+				'principal' => '{DAV:}owner',
+				'protected' => true,
+			],
+			[
+				'privilege' => '{DAV:}read',
+				'principal' => 'principals/system/public',
+				'protected' => true,
+			]
+		];
+
+		// TODO: add more acl to convert the logic
+		if ($this->share->getPermissions() & Constants::PERMISSION_DELETE === Constants::PERMISSION_DELETE) {
+			$acl[]= [
+				[
+					'privilege' => '{DAV:}unbind',
+					'principal' => 'principals/system/public',
+					'protected' => true,
+				]
+			];
+		}
+
+		return $acl;
+	}
+
+}