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<?php
/**
 * @author Arthur Schiwon <blizzz@owncloud.com>
 * @author Joas Schilling <nickvergessen@owncloud.com>
 * @author Lukas Reschke <lukas@owncloud.com>
 * @author Morris Jobke <hey@morrisjobke.de>
 * @author Robin McCorkell <robin@mccorkell.me.uk>
 * @author Roeland Jago Douma <rullzer@owncloud.com>
 *
 * @copyright Copyright (c) 2016, ownCloud, Inc.
 * @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 OC;

use OCP\IAvatarManager;
use OCP\IUserManager;
use OCP\Files\IRootFolder;
use OCP\IL10N;

/**
 * This class implements methods to access Avatar functionality
 */
class AvatarManager implements IAvatarManager {

	/** @var  IUserManager */
	private $userManager;

	/** @var  IRootFolder */
	private $rootFolder;

	/** @var IL10N */
	private $l;

	public function __construct(
			IUserManager $userManager,
			IRootFolder $rootFolder,
			IL10N $l) {
		$this->userManager = $userManager;
		$this->rootFolder = $rootFolder;
		$this->l = $l;
	}

	/**
	 * return a user specific instance of \OCP\IAvatar
	 * @see \OCP\IAvatar
	 * @param string $user the ownCloud user id
	 * @return \OCP\IAvatar
	 * @throws \Exception In case the username is potentially dangerous
	 */
	public function getAvatar($userId) {
		$user = $this->userManager->get($userId);
		if (is_null($user)) {
			throw new \Exception('user does not exist');
		}
		return new Avatar($this->rootFolder->getUserFolder($userId)->getParent(), $this->l, $user);
	}
}