Add \OC\User\Backend

Since some apps (ldap et al) still depend on OC_User_Backend this seemed
like the cleanest approach.

4 files changed, 185 insertions, 11 deletions

diff --git a/lib/private/User/Backend.php b/lib/private/User/Backend.php
new file mode 100644
index 00000000000..d5f82dc9621
--- /dev/null
+++ b/lib/private/User/Backend.php
@@ -0,0 +1,174 @@
+<?php
+/**
+ * @author Aldo "xoen" Giambelluca <xoen@xoen.org>
+ * @author Bart Visscher <bartv@thisnet.nl>
+ * @author Björn Schießle <schiessle@owncloud.com>
+ * @author Dominik Schmidt <dev@dominik-schmidt.de>
+ * @author Georg Ehrke <georg@owncloud.com>
+ * @author Jakob Sack <mail@jakobsack.de>
+ * @author Joas Schilling <nickvergessen@owncloud.com>
+ * @author Jörn Friedrich Dreyer <jfd@butonic.de>
+ * @author Lukas Reschke <lukas@owncloud.com>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Robin Appelman <icewind@owncloud.com>
+ * @author Sam Tuke <mail@samtuke.com>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ * @author Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
+ *
+ * @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\User;
+
+/**
+ * Abstract base class for user management. Provides methods for querying backend
+ * capabilities.
+ */
+abstract class Backend implements \OCP\UserInterface {
+	/**
+	 * error code for functions not provided by the user backend
+	 */
+	const NOT_IMPLEMENTED = -501;
+
+	/**
+	 * actions that user backends can define
+	 */
+	const CREATE_USER		= 1;			// 1 << 0
+	const SET_PASSWORD		= 16;			// 1 << 4
+	const CHECK_PASSWORD	= 256;			// 1 << 8
+	const GET_HOME			= 4096;			// 1 << 12
+	const GET_DISPLAYNAME	= 65536;		// 1 << 16
+	const SET_DISPLAYNAME	= 1048576;		// 1 << 20
+	const PROVIDE_AVATAR	= 16777216;		// 1 << 24
+	const COUNT_USERS		= 268435456;	// 1 << 28
+
+	protected $possibleActions = array(
+		self::CREATE_USER => 'createUser',
+		self::SET_PASSWORD => 'setPassword',
+		self::CHECK_PASSWORD => 'checkPassword',
+		self::GET_HOME => 'getHome',
+		self::GET_DISPLAYNAME => 'getDisplayName',
+		self::SET_DISPLAYNAME => 'setDisplayName',
+		self::PROVIDE_AVATAR => 'canChangeAvatar',
+		self::COUNT_USERS => 'countUsers',
+	);
+
+	/**
+	* Get all supported actions
+	* @return int bitwise-or'ed actions
+	*
+	* Returns the supported actions as int to be
+	* compared with self::CREATE_USER etc.
+	*/
+	public function getSupportedActions() {
+		$actions = 0;
+		foreach($this->possibleActions AS $action => $methodName) {
+			if(method_exists($this, $methodName)) {
+				$actions |= $action;
+			}
+		}
+
+		return $actions;
+	}
+
+	/**
+	* Check if backend implements actions
+	* @param int $actions bitwise-or'ed actions
+	* @return boolean
+	*
+	* Returns the supported actions as int to be
+	* compared with self::CREATE_USER etc.
+	*/
+	public function implementsActions($actions) {
+		return (bool)($this->getSupportedActions() & $actions);
+	}
+
+	/**
+	 * delete a user
+	 * @param string $uid The username of the user to delete
+	 * @return bool
+	 *
+	 * Deletes a user
+	 */
+	public function deleteUser( $uid ) {
+		return false;
+	}
+
+	/**
+	 * Get a list of all users
+	 *
+	 * @param string $search
+	 * @param null|int $limit
+	 * @param null|int $offset
+	 * @return string[] an array of all uids
+	 */
+	public function getUsers($search = '', $limit = null, $offset = null) {
+		return array();
+	}
+
+	/**
+	* check if a user exists
+	* @param string $uid the username
+	* @return boolean
+	*/
+	public function userExists($uid) {
+		return false;
+	}
+
+	/**
+	* get the user's home directory
+	* @param string $uid the username
+	* @return boolean
+	*/
+	public function getHome($uid) {
+		return false;
+	}
+
+	/**
+	 * get display name of the user
+	 * @param string $uid user ID of the user
+	 * @return string display name
+	 */
+	public function getDisplayName($uid) {
+		return $uid;
+	}
+
+	/**
+	 * Get a list of all display names and user ids.
+	 *
+	 * @param string $search
+	 * @param string|null $limit
+	 * @param string|null $offset
+	 * @return array an array of all displayNames (value) and the corresponding uids (key)
+	 */
+	public function getDisplayNames($search = '', $limit = null, $offset = null) {
+		$displayNames = array();
+		$users = $this->getUsers($search, $limit, $offset);
+		foreach ( $users as $user) {
+			$displayNames[$user] = $user;
+		}
+		return $displayNames;
+	}
+
+	/**
+	 * Check if a user list is available or not
+	 * @return boolean if users can be listed or not
+	 */
+	public function hasUserListings() {
+		return false;
+	}
+}
diff --git a/lib/private/User/Database.php b/lib/private/User/Database.php
index ac8b2f96e53..7a4b58e6f40 100644
--- a/lib/private/User/Database.php
+++ b/lib/private/User/Database.php
@@ -55,7 +55,7 @@ use OC\Cache\CappedMemoryCache;
 /**
  * Class for user management in a SQL Database (e.g. MySQL, SQLite)
  */
-class Database extends \OC_User_Backend implements \OCP\IUserBackend {
+class Database extends \OC\User\Backend implements \OCP\IUserBackend {
 	/** @var CappedMemoryCache */
 	private $cache;
 
diff --git a/lib/private/User/Manager.php b/lib/private/User/Manager.php
index 37a3e5ba134..a9d9425e24d 100644
--- a/lib/private/User/Manager.php
+++ b/lib/private/User/Manager.php
@@ -186,7 +186,7 @@ class Manager extends PublicEmitter implements IUserManager {
 		$password = str_replace("\0", '', $password);
 		
 		foreach ($this->backends as $backend) {
-			if ($backend->implementsActions(\OC_User_Backend::CHECK_PASSWORD)) {
+			if ($backend->implementsActions(\OC\User\Backend::CHECK_PASSWORD)) {
 				$uid = $backend->checkPassword($loginName, $password);
 				if ($uid !== false) {
 					return $this->getUserObject($uid, $backend);
@@ -290,7 +290,7 @@ class Manager extends PublicEmitter implements IUserManager {
 
 		$this->emit('\OC\User', 'preCreateUser', array($uid, $password));
 		foreach ($this->backends as $backend) {
-			if ($backend->implementsActions(\OC_User_Backend::CREATE_USER)) {
+			if ($backend->implementsActions(\OC\User\Backend::CREATE_USER)) {
 				$backend->createUser($uid, $password);
 				$user = $this->getUserObject($uid, $backend);
 				$this->emit('\OC\User', 'postCreateUser', array($user, $password));
@@ -308,7 +308,7 @@ class Manager extends PublicEmitter implements IUserManager {
 	public function countUsers() {
 		$userCountStatistics = array();
 		foreach ($this->backends as $backend) {
-			if ($backend->implementsActions(\OC_User_Backend::COUNT_USERS)) {
+			if ($backend->implementsActions(\OC\User\Backend::COUNT_USERS)) {
 				$backendUsers = $backend->countUsers();
 				if($backendUsers !== false) {
 					if($backend instanceof IUserBackend) {
diff --git a/lib/private/User/User.php b/lib/private/User/User.php
index 36680436769..66ecbd18534 100644
--- a/lib/private/User/User.php
+++ b/lib/private/User/User.php
@@ -110,7 +110,7 @@ class User implements IUser {
 	public function getDisplayName() {
 		if (!isset($this->displayName)) {
 			$displayName = '';
-			if ($this->backend and $this->backend->implementsActions(\OC_User_Backend::GET_DISPLAYNAME)) {
+			if ($this->backend and $this->backend->implementsActions(\OC\User\Backend::GET_DISPLAYNAME)) {
 				// get display name and strip whitespace from the beginning and end of it
 				$backendDisplayName = $this->backend->getDisplayName($this->uid);
 				if (is_string($backendDisplayName)) {
@@ -135,7 +135,7 @@ class User implements IUser {
 	 */
 	public function setDisplayName($displayName) {
 		$displayName = trim($displayName);
-		if ($this->backend->implementsActions(\OC_User_Backend::SET_DISPLAYNAME) && !empty($displayName)) {
+		if ($this->backend->implementsActions(\OC\User\Backend::SET_DISPLAYNAME) && !empty($displayName)) {
 			$result = $this->backend->setDisplayName($this->uid, $displayName);
 			if ($result) {
 				$this->displayName = $displayName;
@@ -230,7 +230,7 @@ class User implements IUser {
 		if ($this->emitter) {
 			$this->emitter->emit('\OC\User', 'preSetPassword', array($this, $password, $recoveryPassword));
 		}
-		if ($this->backend->implementsActions(\OC_User_Backend::SET_PASSWORD)) {
+		if ($this->backend->implementsActions(\OC\User\Backend::SET_PASSWORD)) {
 			$result = $this->backend->setPassword($this->uid, $password);
 			if ($this->emitter) {
 				$this->emitter->emit('\OC\User', 'postSetPassword', array($this, $password, $recoveryPassword));
@@ -248,7 +248,7 @@ class User implements IUser {
 	 */
 	public function getHome() {
 		if (!$this->home) {
-			if ($this->backend->implementsActions(\OC_User_Backend::GET_HOME) and $home = $this->backend->getHome($this->uid)) {
+			if ($this->backend->implementsActions(\OC\User\Backend::GET_HOME) and $home = $this->backend->getHome($this->uid)) {
 				$this->home = $home;
 			} elseif ($this->config) {
 				$this->home = $this->config->getSystemValue('datadirectory') . '/' . $this->uid;
@@ -277,7 +277,7 @@ class User implements IUser {
 	 * @return bool
 	 */
 	public function canChangeAvatar() {
-		if ($this->backend->implementsActions(\OC_User_Backend::PROVIDE_AVATAR)) {
+		if ($this->backend->implementsActions(\OC\User\Backend::PROVIDE_AVATAR)) {
 			return $this->backend->canChangeAvatar($this->uid);
 		}
 		return true;
@@ -289,7 +289,7 @@ class User implements IUser {
 	 * @return bool
 	 */
 	public function canChangePassword() {
-		return $this->backend->implementsActions(\OC_User_Backend::SET_PASSWORD);
+		return $this->backend->implementsActions(\OC\User\Backend::SET_PASSWORD);
 	}
 
 	/**
@@ -301,7 +301,7 @@ class User implements IUser {
 		if ($this->config->getSystemValue('allow_user_to_change_display_name') === false) {
 			return false;
 		}
-		return $this->backend->implementsActions(\OC_User_Backend::SET_DISPLAYNAME);
+		return $this->backend->implementsActions(\OC\User\Backend::SET_DISPLAYNAME);
 	}
 
 	/**