Merge pull request #4062 from nextcloud/downstream-26872

Adding dav resource for avatars

apps/dav/lib/Avatars/AvatarHome.php

@@ -0,0 +1,120 @@
+<?php
+/**
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, 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\Avatars;
+
+
+use OCP\IAvatarManager;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\Exception\MethodNotAllowed;
+use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\ICollection;
+use Sabre\Uri;
+
+class AvatarHome implements ICollection {
+
+	/** @var array */
+	private $principalInfo;
+	/** @var IAvatarManager */
+	private $avatarManager;
+
+	/**
+	 * AvatarHome constructor.
+	 *
+	 * @param array $principalInfo
+	 * @param IAvatarManager $avatarManager
+	 */
+	public function __construct($principalInfo, IAvatarManager $avatarManager) {
+		$this->principalInfo = $principalInfo;
+		$this->avatarManager = $avatarManager;
+	}
+
+	public function createFile($name, $data = null) {
+		throw new Forbidden('Permission denied to create a file');
+	}
+
+	public function createDirectory($name) {
+		throw new Forbidden('Permission denied to create a folder');
+	}
+
+	public function getChild($name) {
+		$elements = pathinfo($name);
+		$ext = isset($elements['extension']) ? $elements['extension'] : '';
+		$size = (int)(isset($elements['filename']) ? $elements['filename'] : '64');
+		if (!in_array($ext, ['jpeg', 'png'], true)) {
+			throw new MethodNotAllowed('File format not allowed');
+		}
+		if ($size <= 0 || $size > 1024) {
+			throw new MethodNotAllowed('Invalid image size');
+		}
+		$avatar = $this->avatarManager->getAvatar($this->getName());
+		if ($avatar === null || !$avatar->exists()) {
+			throw new NotFound();
+		}
+		return new AvatarNode($size, $ext, $avatar);
+	}
+
+	public function getChildren() {
+		try {
+			return [
+				$this->getChild('96.jpeg')
+			];
+		} catch(NotFound $exception) {
+			return [];
+		}
+	}
+
+	public function childExists($name) {
+		try {
+			$ret = $this->getChild($name);
+			return $ret !== null;
+		} catch (NotFound $ex) {
+			return false;
+		} catch (MethodNotAllowed $ex) {
+			return false;
+		}
+	}
+
+	public function delete() {
+		throw new Forbidden('Permission denied to delete this folder');
+	}
+
+	public function getName() {
+		list(,$name) = Uri\split($this->principalInfo['uri']);
+		return $name;
+	}
+
+	public function setName($name) {
+		throw new Forbidden('Permission denied to rename this folder');
+	}
+
+	/**
+	 * Returns the last modification time, as a unix timestamp
+	 *
+	 * @return int|null
+	 */
+	public function getLastModified() {
+		return null;
+	}
+
+
+}

apps/dav/lib/Avatars/AvatarNode.php

@@ -0,0 +1,98 @@
+<?php
+/**
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, 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\Avatars;
+
+
+use OCP\IAvatar;
+use Sabre\DAV\File;
+
+class AvatarNode extends File {
+	private $ext;
+	private $size;
+	private $avatar;
+
+	/**
+	 * AvatarNode constructor.
+	 *
+	 * @param integer $size
+	 * @param string $ext
+	 * @param IAvatar $avatar
+	 */
+	public function __construct($size, $ext, $avatar) {
+		$this->size = $size;
+		$this->ext = $ext;
+		$this->avatar = $avatar;
+	}
+
+	/**
+	 * Returns the name of the node.
+	 *
+	 * This is used to generate the url.
+	 *
+	 * @return string
+	 */
+	public function getName() {
+		return "$this->size.$this->ext";
+	}
+
+	public function get() {
+		$image = $this->avatar->get($this->size);
+		$res = $image->resource();
+
+		ob_start();
+		if ($this->ext === 'png') {
+			imagepng($res);
+		} else {
+			imagejpeg($res);
+		}
+
+		return ob_get_clean();
+	}
+
+	/**
+	 * Returns the mime-type for a file
+	 *
+	 * If null is returned, we'll assume application/octet-stream
+	 *
+	 * @return string|null
+	 */
+	public function getContentType() {
+		if ($this->ext === 'png') {
+			return 'image/png';
+		}
+		return 'image/jpeg';
+	}
+
+	public function getETag() {
+		return $this->avatar->getFile($this->size)->getEtag();
+	}
+
+	public function getLastModified() {
+		$timestamp = $this->avatar->getFile($this->size)->getMTime();
+		if (!empty($timestamp)) {
+			return (int)$timestamp;
+		}
+		return $timestamp;
+
+	}
+}

apps/dav/lib/Avatars/RootCollection.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace OCA\DAV\Avatars;
+
+use Sabre\DAVACL\AbstractPrincipalCollection;
+
+
+class RootCollection extends AbstractPrincipalCollection {
+
+	/**
+	 * 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 AvatarHome
+	 */
+	public function getChildForPrincipal(array $principalInfo) {
+		$avatarManager = \OC::$server->getAvatarManager();
+		return new AvatarHome($principalInfo, $avatarManager);
+	}
+
+	public function getName() {
+		return 'avatars';
+	}
+
+}

apps/dav/lib/Connector/Sabre/Principal.php

@@ -223,8 +223,8 @@ protected function userToPrincipal($user) {
 		$email = $user->getEMailAddress();
 		if (!empty($email)) {
 			$principal['{http://sabredav.org/ns}email-address'] = $email;
-			return $principal;
 		}
+
 		return $principal;
 	}
 

apps/dav/lib/RootCollection.php

@@ -99,6 +99,9 @@ public function __construct() {
 		$uploadCollection = new Upload\RootCollection($userPrincipalBackend, 'principals/users');
 		$uploadCollection->disableListing = $disableListing;
 
+		$avatarCollection = new Avatars\RootCollection($userPrincipalBackend, 'principals/users');
+		$avatarCollection->disableListing = $disableListing;
+
 		$children = [
 				new SimpleCollection('principals', [
 						$userPrincipals,
@@ -114,6 +117,7 @@ public function __construct() {
 				$systemTagRelationsCollection,
 				$commentsCollection,
 				$uploadCollection,
+				$avatarCollection
 		];
 
 		parent::__construct('root', $children);