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+<?php
+/**
+ * @author Arthur Schiwon <blizzz@owncloud.com>
+ * @author Joas Schilling <nickvergessen@owncloud.com>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Robin Appelman <icewind@owncloud.com>
+ * @author Roeland Jago Douma <rullzer@owncloud.com>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @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 OCP;
+use OCP\Files\File;
+use OCP\Files\NotFoundException;
+
+/**
+ * This class provides avatar functionality
+ * @since 6.0.0
+ */
+interface IAvatar {
+
+ /**
+ * get the users avatar
+ * @param int $size size in px of the avatar, avatars are square, defaults to 64, -1 can be used to not scale the image
+ * @return boolean|\OCP\IImage containing the avatar or false if there's no image
+ * @since 6.0.0 - size of -1 was added in 9.0.0
+ */
+ public function get($size = 64);
+
+ /**
+ * Check if an avatar exists for the user
+ *
+ * @return bool
+ * @since 8.1.0
+ */
+ public function exists();
+
+ /**
+ * sets the users avatar
+ * @param \OCP\IImage|resource|string $data An image object, imagedata or path to set a new avatar
+ * @throws \Exception if the provided file is not a jpg or png image
+ * @throws \Exception if the provided image is not valid
+ * @throws \OC\NotSquareException if the image is not square
+ * @return void
+ * @since 6.0.0
+ */
+ public function set($data);
+
+ /**
+ * remove the users avatar
+ * @return void
+ * @since 6.0.0
+ */
+ public function remove();
+
+ /**
+ * Get the file of the avatar
+ * @param int $size -1 can be used to not scale the image
+ * @return File
+ * @throws NotFoundException
+ * @since 9.0.0
+ */
+ public function getFile($size);
+}