nextcloud / server

settings/Controller/UsersController.php

Indentation +928 added lines, -928 removed lines

@@ -58,933 +58,933 @@
  * @package OC\Settings\Controller
  */
 class UsersController extends Controller {
-	/** @var IL10N */
-	private $l10n;
-	/** @var IUserSession */
-	private $userSession;
-	/** @var bool */
-	private $isAdmin;
-	/** @var IUserManager */
-	private $userManager;
-	/** @var IGroupManager */
-	private $groupManager;
-	/** @var IConfig */
-	private $config;
-	/** @var ILogger */
-	private $log;
-	/** @var IMailer */
-	private $mailer;
-	/** @var bool contains the state of the encryption app */
-	private $isEncryptionAppEnabled;
-	/** @var bool contains the state of the admin recovery setting */
-	private $isRestoreEnabled = false;
-	/** @var IAvatarManager */
-	private $avatarManager;
-	/** @var AccountManager */
-	private $accountManager;
-	/** @var ISecureRandom */
-	private $secureRandom;
-	/** @var NewUserMailHelper */
-	private $newUserMailHelper;
-	/** @var ITimeFactory */
-	private $timeFactory;
-	/** @var ICrypto */
-	private $crypto;
-	/** @var Manager */
-	private $keyManager;
-	/** @var IJobList */
-	private $jobList;
-
-	/**
-	 * @param string $appName
-	 * @param IRequest $request
-	 * @param IUserManager $userManager
-	 * @param IGroupManager $groupManager
-	 * @param IUserSession $userSession
-	 * @param IConfig $config
-	 * @param bool $isAdmin
-	 * @param IL10N $l10n
-	 * @param ILogger $log
-	 * @param IMailer $mailer
-	 * @param IURLGenerator $urlGenerator
-	 * @param IAppManager $appManager
-	 * @param IAvatarManager $avatarManager
-	 * @param AccountManager $accountManager
-	 * @param ISecureRandom $secureRandom
-	 * @param NewUserMailHelper $newUserMailHelper
-	 * @param ITimeFactory $timeFactory
-	 * @param ICrypto $crypto
-	 * @param Manager $keyManager
-	 * @param IJobList $jobList
-	 */
-	public function __construct($appName,
-								IRequest $request,
-								IUserManager $userManager,
-								IGroupManager $groupManager,
-								IUserSession $userSession,
-								IConfig $config,
-								$isAdmin,
-								IL10N $l10n,
-								ILogger $log,
-								IMailer $mailer,
-								IURLGenerator $urlGenerator,
-								IAppManager $appManager,
-								IAvatarManager $avatarManager,
-								AccountManager $accountManager,
-								ISecureRandom $secureRandom,
-								NewUserMailHelper $newUserMailHelper,
-								ITimeFactory $timeFactory,
-								ICrypto $crypto,
-								Manager $keyManager,
-								IJobList $jobList) {
-		parent::__construct($appName, $request);
-		$this->userManager = $userManager;
-		$this->groupManager = $groupManager;
-		$this->userSession = $userSession;
-		$this->config = $config;
-		$this->isAdmin = $isAdmin;
-		$this->l10n = $l10n;
-		$this->log = $log;
-		$this->mailer = $mailer;
-		$this->avatarManager = $avatarManager;
-		$this->accountManager = $accountManager;
-		$this->secureRandom = $secureRandom;
-		$this->newUserMailHelper = $newUserMailHelper;
-		$this->timeFactory = $timeFactory;
-		$this->crypto = $crypto;
-		$this->keyManager = $keyManager;
-		$this->jobList = $jobList;
-
-		// check for encryption state - TODO see formatUserForIndex
-		$this->isEncryptionAppEnabled = $appManager->isEnabledForUser('encryption');
-		if($this->isEncryptionAppEnabled) {
-			// putting this directly in empty is possible in PHP 5.5+
-			$result = $config->getAppValue('encryption', 'recoveryAdminEnabled', 0);
-			$this->isRestoreEnabled = !empty($result);
-		}
-	}
-
-	/**
-	 * @param IUser $user
-	 * @param array $userGroups
-	 * @return array
-	 */
-	private function formatUserForIndex(IUser $user, array $userGroups = null) {
-
-		// TODO: eliminate this encryption specific code below and somehow
-		// hook in additional user info from other apps
-
-		// recovery isn't possible if admin or user has it disabled and encryption
-		// is enabled - so we eliminate the else paths in the conditional tree
-		// below
-		$restorePossible = false;
-
-		if ($this->isEncryptionAppEnabled) {
-			if ($this->isRestoreEnabled) {
-				// check for the users recovery setting
-				$recoveryMode = $this->config->getUserValue($user->getUID(), 'encryption', 'recoveryEnabled', '0');
-				// method call inside empty is possible with PHP 5.5+
-				$recoveryModeEnabled = !empty($recoveryMode);
-				if ($recoveryModeEnabled) {
-					// user also has recovery mode enabled
-					$restorePossible = true;
-				}
-			}
-		} else {
-			// recovery is possible if encryption is disabled (plain files are
-			// available)
-			$restorePossible = true;
-		}
-
-		$subAdminGroups = $this->groupManager->getSubAdmin()->getSubAdminsGroups($user);
-		foreach($subAdminGroups as $key => $subAdminGroup) {
-			$subAdminGroups[$key] = $subAdminGroup->getGID();
-		}
-
-		$displayName = $user->getEMailAddress();
-		if (is_null($displayName)) {
-			$displayName = '';
-		}
-
-		$avatarAvailable = false;
-		try {
-			$avatarAvailable = $this->avatarManager->getAvatar($user->getUID())->exists();
-		} catch (\Exception $e) {
-			//No avatar yet
-		}
-
-		return [
-			'name' => $user->getUID(),
-			'displayname' => $user->getDisplayName(),
-			'groups' => (empty($userGroups)) ? $this->groupManager->getUserGroupIds($user) : $userGroups,
-			'subadmin' => $subAdminGroups,
-			'quota' => $user->getQuota(),
-			'storageLocation' => $user->getHome(),
-			'lastLogin' => $user->getLastLogin() * 1000,
-			'backend' => $user->getBackendClassName(),
-			'email' => $displayName,
-			'isRestoreDisabled' => !$restorePossible,
-			'isAvatarAvailable' => $avatarAvailable,
-			'isEnabled' => $user->isEnabled(),
-		];
-	}
-
-	/**
-	 * @param array $userIDs Array with schema [$uid => $displayName]
-	 * @return IUser[]
-	 */
-	private function getUsersForUID(array $userIDs) {
-		$users = [];
-		foreach ($userIDs as $uid => $displayName) {
-			$users[$uid] = $this->userManager->get($uid);
-		}
-		return $users;
-	}
-
-	/**
-	 * @NoAdminRequired
-	 *
-	 * @param int $offset
-	 * @param int $limit
-	 * @param string $gid GID to filter for
-	 * @param string $pattern Pattern to search for in the username
-	 * @param string $backend Backend to filter for (class-name)
-	 * @return DataResponse
-	 *
-	 * TODO: Tidy up and write unit tests - code is mainly static method calls
-	 */
-	public function index($offset = 0, $limit = 10, $gid = '', $pattern = '', $backend = '') {
-		// Remove backends
-		if(!empty($backend)) {
-			$activeBackends = $this->userManager->getBackends();
-			$this->userManager->clearBackends();
-			foreach($activeBackends as $singleActiveBackend) {
-				if($backend === get_class($singleActiveBackend)) {
-					$this->userManager->registerBackend($singleActiveBackend);
-					break;
-				}
-			}
-		}
-
-		$users = [];
-		if ($this->isAdmin) {
-			if($gid !== '' && $gid !== '_disabledUsers') {
-				$batch = $this->getUsersForUID($this->groupManager->displayNamesInGroup($gid, $pattern, $limit, $offset));
-			} else {
-				$batch = $this->userManager->search($pattern, $limit, $offset);
-			}
-
-			foreach ($batch as $user) {
-				if( ($gid !== '_disabledUsers' && $user->isEnabled()) ||
-					($gid === '_disabledUsers' && !$user->isEnabled())
-				) {
-					$users[] = $this->formatUserForIndex($user);
-				}
-			}
-
-		} else {
-			$subAdminOfGroups = $this->groupManager->getSubAdmin()->getSubAdminsGroups($this->userSession->getUser());
-			// New class returns IGroup[] so convert back
-			$gids = [];
-			foreach ($subAdminOfGroups as $group) {
-				$gids[] = $group->getGID();
-			}
-			$subAdminOfGroups = $gids;
-
-			// Set the $gid parameter to an empty value if the subadmin has no rights to access a specific group
-			if($gid !== '' && $gid !== '_disabledUsers' && !in_array($gid, $subAdminOfGroups)) {
-				$gid = '';
-			}
-
-			// Batch all groups the user is subadmin of when a group is specified
-			$batch = [];
-			if($gid === '') {
-				foreach($subAdminOfGroups as $group) {
-					$groupUsers = $this->groupManager->displayNamesInGroup($group, $pattern, $limit, $offset);
-
-					foreach($groupUsers as $uid => $displayName) {
-						$batch[$uid] = $displayName;
-					}
-				}
-			} else {
-				$batch = $this->groupManager->displayNamesInGroup($gid, $pattern, $limit, $offset);
-			}
-			$batch = $this->getUsersForUID($batch);
-
-			foreach ($batch as $user) {
-				// Only add the groups, this user is a subadmin of
-				$userGroups = array_values(array_intersect(
-					$this->groupManager->getUserGroupIds($user),
-					$subAdminOfGroups
-				));
-				if( ($gid !== '_disabledUsers' && $user->isEnabled()) ||
-					($gid === '_disabledUsers' && !$user->isEnabled())
-				) {
-					$users[] = $this->formatUserForIndex($user, $userGroups);
-				}
-			}
-		}
-
-		return new DataResponse($users);
-	}
-
-	/**
-	 * @NoAdminRequired
-	 * @PasswordConfirmationRequired
-	 *
-	 * @param string $username
-	 * @param string $password
-	 * @param array $groups
-	 * @param string $email
-	 * @return DataResponse
-	 */
-	public function create($username, $password, array $groups=[], $email='') {
-		if($email !== '' && !$this->mailer->validateMailAddress($email)) {
-			return new DataResponse(
-				[
-					'message' => (string)$this->l10n->t('Invalid mail address')
-				],
-				Http::STATUS_UNPROCESSABLE_ENTITY
-			);
-		}
-
-		$currentUser = $this->userSession->getUser();
-
-		if (!$this->isAdmin) {
-			if (!empty($groups)) {
-				foreach ($groups as $key => $group) {
-					$groupObject = $this->groupManager->get($group);
-					if($groupObject === null) {
-						unset($groups[$key]);
-						continue;
-					}
-
-					if (!$this->groupManager->getSubAdmin()->isSubAdminofGroup($currentUser, $groupObject)) {
-						unset($groups[$key]);
-					}
-				}
-			}
-
-			if (empty($groups)) {
-				return new DataResponse(
-					[
-						'message' => $this->l10n->t('No valid group selected'),
-					],
-					Http::STATUS_FORBIDDEN
-				);
-			}
-		}
-
-		if ($this->userManager->userExists($username)) {
-			return new DataResponse(
-				[
-					'message' => (string)$this->l10n->t('A user with that name already exists.')
-				],
-				Http::STATUS_CONFLICT
-			);
-		}
-
-		$generatePasswordResetToken = false;
-		if ($password === '') {
-			if ($email === '') {
-				return new DataResponse(
-					[
-						'message' => (string)$this->l10n->t('To send a password link to the user an email address is required.')
-					],
-					Http::STATUS_UNPROCESSABLE_ENTITY
-				);
-			}
-
-			$password = $this->secureRandom->generate(32);
-			$generatePasswordResetToken = true;
-		}
-
-		try {
-			$user = $this->userManager->createUser($username, $password);
-		} catch (\Exception $exception) {
-			$message = $exception->getMessage();
-			if (!$message) {
-				$message = $this->l10n->t('Unable to create user.');
-			}
-			return new DataResponse(
-				[
-					'message' => (string) $message,
-				],
-				Http::STATUS_FORBIDDEN
-			);
-		}
-
-		if($user instanceof IUser) {
-			if($groups !== null) {
-				foreach($groups as $groupName) {
-					$group = $this->groupManager->get($groupName);
-
-					if(empty($group)) {
-						$group = $this->groupManager->createGroup($groupName);
-					}
-					$group->addUser($user);
-				}
-			}
-			/**
-			 * Send new user mail only if a mail is set
-			 */
-			if($email !== '') {
-				$user->setEMailAddress($email);
-				try {
-					$emailTemplate = $this->newUserMailHelper->generateTemplate($user, $generatePasswordResetToken);
-					$this->newUserMailHelper->sendMail($user, $emailTemplate);
-				} catch(\Exception $e) {
-					$this->log->error("Can't send new user mail to $email: " . $e->getMessage(), ['app' => 'settings']);
-				}
-			}
-			// fetch users groups
-			$userGroups = $this->groupManager->getUserGroupIds($user);
-
-			return new DataResponse(
-				$this->formatUserForIndex($user, $userGroups),
-				Http::STATUS_CREATED
-			);
-		}
-
-		return new DataResponse(
-			[
-				'message' => (string) $this->l10n->t('Unable to create user.')
-			],
-			Http::STATUS_FORBIDDEN
-		);
-
-	}
-
-	/**
-	 * @NoAdminRequired
-	 * @PasswordConfirmationRequired
-	 *
-	 * @param string $id
-	 * @return DataResponse
-	 */
-	public function destroy($id) {
-		$userId = $this->userSession->getUser()->getUID();
-		$user = $this->userManager->get($id);
-
-		if($userId === $id) {
-			return new DataResponse(
-				[
-					'status' => 'error',
-					'data' => [
-						'message' => (string) $this->l10n->t('Unable to delete user.')
-					]
-				],
-				Http::STATUS_FORBIDDEN
-			);
-		}
-
-		if(!$this->isAdmin && !$this->groupManager->getSubAdmin()->isUserAccessible($this->userSession->getUser(), $user)) {
-			return new DataResponse(
-				[
-					'status' => 'error',
-					'data' => [
-						'message' => (string)$this->l10n->t('Authentication error')
-					]
-				],
-				Http::STATUS_FORBIDDEN
-			);
-		}
-
-		if($user) {
-			if($user->delete()) {
-				return new DataResponse(
-					[
-						'status' => 'success',
-						'data' => [
-							'username' => $id
-						]
-					],
-					Http::STATUS_NO_CONTENT
-				);
-			}
-		}
-
-		return new DataResponse(
-			[
-				'status' => 'error',
-				'data' => [
-					'message' => (string)$this->l10n->t('Unable to delete user.')
-				]
-			],
-			Http::STATUS_FORBIDDEN
-		);
-	}
-
-	/**
-	 * @NoAdminRequired
-	 *
-	 * @param string $id
-	 * @param int $enabled
-	 * @return DataResponse
-	 */
-	public function setEnabled($id, $enabled) {
-		$enabled = (bool)$enabled;
-		if($enabled) {
-			$errorMsgGeneral = (string) $this->l10n->t('Error while enabling user.');
-		} else {
-			$errorMsgGeneral = (string) $this->l10n->t('Error while disabling user.');
-		}
-
-		$userId = $this->userSession->getUser()->getUID();
-		$user = $this->userManager->get($id);
-
-		if ($userId === $id) {
-			return new DataResponse(
-				[
-					'status' => 'error',
-					'data' => [
-						'message' => $errorMsgGeneral
-					]
-				], Http::STATUS_FORBIDDEN
-			);
-		}
-
-		if($user) {
-			if (!$this->isAdmin && !$this->groupManager->getSubAdmin()->isUserAccessible($this->userSession->getUser(), $user)) {
-				return new DataResponse(
-					[
-						'status' => 'error',
-						'data' => [
-							'message' => (string) $this->l10n->t('Authentication error')
-						]
-					],
-					Http::STATUS_FORBIDDEN
-				);
-			}
-
-			$user->setEnabled($enabled);
-			return new DataResponse(
-				[
-					'status' => 'success',
-					'data' => [
-						'username' => $id,
-						'enabled' => $enabled
-					]
-				]
-			);
-		} else {
-			return new DataResponse(
-				[
-					'status' => 'error',
-					'data' => [
-						'message' => $errorMsgGeneral
-					]
-				],
-				Http::STATUS_FORBIDDEN
-			);
-		}
-
-	}
-
-	/**
-	 * Set the mail address of a user
-	 *
-	 * @NoAdminRequired
-	 * @NoSubadminRequired
-	 * @PasswordConfirmationRequired
-	 *
-	 * @param string $account
-	 * @param bool $onlyVerificationCode only return verification code without updating the data
-	 * @return DataResponse
-	 */
-	public function getVerificationCode($account, $onlyVerificationCode) {
-
-		$user = $this->userSession->getUser();
-
-		if ($user === null) {
-			return new DataResponse([], Http::STATUS_BAD_REQUEST);
-		}
-
-		$accountData = $this->accountManager->getUser($user);
-		$cloudId = $user->getCloudId();
-		$message = "Use my Federated Cloud ID to share with me: " . $cloudId;
-		$signature = $this->signMessage($user, $message);
-
-		$code = $message . ' ' . $signature;
-		$codeMd5 = $message . ' ' . md5($signature);
-
-		switch ($account) {
-			case 'verify-twitter':
-				$accountData[AccountManager::PROPERTY_TWITTER]['verified'] = AccountManager::VERIFICATION_IN_PROGRESS;
-				$msg = $this->l10n->t('In order to verify your Twitter account, post the following tweet on Twitter (please make sure to post it without any line breaks):');
-				$code = $codeMd5;
-				$type = AccountManager::PROPERTY_TWITTER;
-				$data = $accountData[AccountManager::PROPERTY_TWITTER]['value'];
-				$accountData[AccountManager::PROPERTY_TWITTER]['signature'] = $signature;
-				break;
-			case 'verify-website':
-				$accountData[AccountManager::PROPERTY_WEBSITE]['verified'] = AccountManager::VERIFICATION_IN_PROGRESS;
-				$msg = $this->l10n->t('In order to verify your Website, store the following content in your web-root at \'.well-known/CloudIdVerificationCode.txt\' (please make sure that the complete text is in one line):');
-				$type = AccountManager::PROPERTY_WEBSITE;
-				$data = $accountData[AccountManager::PROPERTY_WEBSITE]['value'];
-				$accountData[AccountManager::PROPERTY_WEBSITE]['signature'] = $signature;
-				break;
-			default:
-				return new DataResponse([], Http::STATUS_BAD_REQUEST);
-		}
-
-		if ($onlyVerificationCode === false) {
-			$this->accountManager->updateUser($user, $accountData);
-
-			$this->jobList->add('OC\Settings\BackgroundJobs\VerifyUserData',
-				[
-					'verificationCode' => $code,
-					'data' => $data,
-					'type' => $type,
-					'uid' => $user->getUID(),
-					'try' => 0,
-					'lastRun' => $this->getCurrentTime()
-				]
-			);
-		}
-
-		return new DataResponse(['msg' => $msg, 'code' => $code]);
-	}
-
-	/**
-	 * get current timestamp
-	 *
-	 * @return int
-	 */
-	protected function getCurrentTime() {
-		return time();
-	}
-
-	/**
-	 * sign message with users private key
-	 *
-	 * @param IUser $user
-	 * @param string $message
-	 *
-	 * @return string base64 encoded signature
-	 */
-	protected function signMessage(IUser $user, $message) {
-		$privateKey = $this->keyManager->getKey($user)->getPrivate();
-		openssl_sign(json_encode($message), $signature, $privateKey, OPENSSL_ALGO_SHA512);
-		$signatureBase64 = base64_encode($signature);
-
-		return $signatureBase64;
-	}
-
-	/**
-	 * @NoAdminRequired
-	 * @NoSubadminRequired
-	 * @PasswordConfirmationRequired
-	 *
-	 * @param string $avatarScope
-	 * @param string $displayname
-	 * @param string $displaynameScope
-	 * @param string $phone
-	 * @param string $phoneScope
-	 * @param string $email
-	 * @param string $emailScope
-	 * @param string $website
-	 * @param string $websiteScope
-	 * @param string $address
-	 * @param string $addressScope
-	 * @param string $twitter
-	 * @param string $twitterScope
-	 * @return DataResponse
-	 */
-	public function setUserSettings($avatarScope,
-									$displayname,
-									$displaynameScope,
-									$phone,
-									$phoneScope,
-									$email,
-									$emailScope,
-									$website,
-									$websiteScope,
-									$address,
-									$addressScope,
-									$twitter,
-									$twitterScope
-	) {
-
-		if (!empty($email) && !$this->mailer->validateMailAddress($email)) {
-			return new DataResponse(
-				[
-					'status' => 'error',
-					'data' => [
-						'message' => (string) $this->l10n->t('Invalid mail address')
-					]
-				],
-				Http::STATUS_UNPROCESSABLE_ENTITY
-			);
-		}
-
-		$data = [
-			AccountManager::PROPERTY_AVATAR =>  ['scope' => $avatarScope],
-			AccountManager::PROPERTY_DISPLAYNAME => ['value' => $displayname, 'scope' => $displaynameScope],
-			AccountManager::PROPERTY_EMAIL=> ['value' => $email, 'scope' => $emailScope],
-			AccountManager::PROPERTY_WEBSITE => ['value' => $website, 'scope' => $websiteScope],
-			AccountManager::PROPERTY_ADDRESS => ['value' => $address, 'scope' => $addressScope],
-			AccountManager::PROPERTY_PHONE => ['value' => $phone, 'scope' => $phoneScope],
-			AccountManager::PROPERTY_TWITTER => ['value' => $twitter, 'scope' => $twitterScope]
-		];
-
-		$user = $this->userSession->getUser();
-
-		try {
-			$this->saveUserSettings($user, $data);
-			return new DataResponse(
-				[
-					'status' => 'success',
-					'data' => [
-						'userId' => $user->getUID(),
-						'avatarScope' => $avatarScope,
-						'displayname' => $displayname,
-						'displaynameScope' => $displaynameScope,
-						'email' => $email,
-						'emailScope' => $emailScope,
-						'website' => $website,
-						'websiteScope' => $websiteScope,
-						'address' => $address,
-						'addressScope' => $addressScope,
-						'message' => (string) $this->l10n->t('Settings saved')
-					]
-				],
-				Http::STATUS_OK
-			);
-		} catch (ForbiddenException $e) {
-			return new DataResponse([
-				'status' => 'error',
-				'data' => [
-					'message' => $e->getMessage()
-				],
-			]);
-		}
-
-	}
-
-
-	/**
-	 * update account manager with new user data
-	 *
-	 * @param IUser $user
-	 * @param array $data
-	 * @throws ForbiddenException
-	 */
-	protected function saveUserSettings(IUser $user, $data) {
-
-		// keep the user back-end up-to-date with the latest display name and email
-		// address
-		$oldDisplayName = $user->getDisplayName();
-		$oldDisplayName = is_null($oldDisplayName) ? '' : $oldDisplayName;
-		if (isset($data[AccountManager::PROPERTY_DISPLAYNAME]['value'])
-			&& $oldDisplayName !== $data[AccountManager::PROPERTY_DISPLAYNAME]['value']
-		) {
-			$result = $user->setDisplayName($data[AccountManager::PROPERTY_DISPLAYNAME]['value']);
-			if ($result === false) {
-				throw new ForbiddenException($this->l10n->t('Unable to change full name'));
-			}
-		}
-
-		$oldEmailAddress = $user->getEMailAddress();
-		$oldEmailAddress = is_null($oldEmailAddress) ? '' : $oldEmailAddress;
-		if (isset($data[AccountManager::PROPERTY_EMAIL]['value'])
-			&& $oldEmailAddress !== $data[AccountManager::PROPERTY_EMAIL]['value']
-		) {
-			// this is the only permission a backend provides and is also used
-			// for the permission of setting a email address
-			if (!$user->canChangeDisplayName()) {
-				throw new ForbiddenException($this->l10n->t('Unable to change email address'));
-			}
-			$user->setEMailAddress($data[AccountManager::PROPERTY_EMAIL]['value']);
-		}
-
-		$this->accountManager->updateUser($user, $data);
-	}
-
-	/**
-	 * Count all unique users visible for the current admin/subadmin.
-	 *
-	 * @NoAdminRequired
-	 *
-	 * @return DataResponse
-	 */
-	public function stats() {
-		$userCount = 0;
-		if ($this->isAdmin) {
-			$countByBackend = $this->userManager->countUsers();
-
-			if (!empty($countByBackend)) {
-				foreach ($countByBackend as $count) {
-					$userCount += $count;
-				}
-			}
-		} else {
-			$groups = $this->groupManager->getSubAdmin()->getSubAdminsGroups($this->userSession->getUser());
-
-			$uniqueUsers = [];
-			foreach ($groups as $group) {
-				foreach($group->getUsers() as $uid => $displayName) {
-					$uniqueUsers[$uid] = true;
-				}
-			}
-
-			$userCount = count($uniqueUsers);
-		}
-
-		return new DataResponse(
-			[
-				'totalUsers' => $userCount
-			]
-		);
-	}
-
-
-	/**
-	 * Set the displayName of a user
-	 *
-	 * @NoAdminRequired
-	 * @NoSubadminRequired
-	 * @PasswordConfirmationRequired
-	 * @todo merge into saveUserSettings
-	 *
-	 * @param string $username
-	 * @param string $displayName
-	 * @return DataResponse
-	 */
-	public function setDisplayName($username, $displayName) {
-		$currentUser = $this->userSession->getUser();
-		$user = $this->userManager->get($username);
-
-		if ($user === null ||
-			!$user->canChangeDisplayName() ||
-			(
-				!$this->groupManager->isAdmin($currentUser->getUID()) &&
-				!$this->groupManager->getSubAdmin()->isUserAccessible($currentUser, $user) &&
-				$currentUser->getUID() !== $username
-
-			)
-		) {
-			return new DataResponse([
-				'status' => 'error',
-				'data' => [
-					'message' => $this->l10n->t('Authentication error'),
-				],
-			]);
-		}
-
-		$userData = $this->accountManager->getUser($user);
-		$userData[AccountManager::PROPERTY_DISPLAYNAME]['value'] = $displayName;
-
-
-		try {
-			$this->saveUserSettings($user, $userData);
-			return new DataResponse([
-				'status' => 'success',
-				'data' => [
-					'message' => $this->l10n->t('Your full name has been changed.'),
-					'username' => $username,
-					'displayName' => $displayName,
-				],
-			]);
-		} catch (ForbiddenException $e) {
-			return new DataResponse([
-				'status' => 'error',
-				'data' => [
-					'message' => $e->getMessage(),
-					'displayName' => $user->getDisplayName(),
-				],
-			]);
-		}
-	}
-
-	/**
-	 * Set the mail address of a user
-	 *
-	 * @NoAdminRequired
-	 * @NoSubadminRequired
-	 * @PasswordConfirmationRequired
-	 *
-	 * @param string $id
-	 * @param string $mailAddress
-	 * @return DataResponse
-	 */
-	public function setEMailAddress($id, $mailAddress) {
-		$user = $this->userManager->get($id);
-		if (!$this->isAdmin
-			&& !$this->groupManager->getSubAdmin()->isUserAccessible($this->userSession->getUser(), $user)
-		) {
-			return new DataResponse(
-				[
-					'status' => 'error',
-					'data' => [
-						'message' => (string) $this->l10n->t('Forbidden')
-					]
-				],
-				Http::STATUS_FORBIDDEN
-			);
-		}
-
-		if($mailAddress !== '' && !$this->mailer->validateMailAddress($mailAddress)) {
-			return new DataResponse(
-				[
-					'status' => 'error',
-					'data' => [
-						'message' => (string) $this->l10n->t('Invalid mail address')
-					]
-				],
-				Http::STATUS_UNPROCESSABLE_ENTITY
-			);
-		}
-
-		if (!$user) {
-			return new DataResponse(
-				[
-					'status' => 'error',
-					'data' => [
-						'message' => (string) $this->l10n->t('Invalid user')
-					]
-				],
-				Http::STATUS_UNPROCESSABLE_ENTITY
-			);
-		}
-		// this is the only permission a backend provides and is also used
-		// for the permission of setting a email address
-		if (!$user->canChangeDisplayName()) {
-			return new DataResponse(
-				[
-					'status' => 'error',
-					'data' => [
-						'message' => (string) $this->l10n->t('Unable to change mail address')
-					]
-				],
-				Http::STATUS_FORBIDDEN
-			);
-		}
-
-		$userData = $this->accountManager->getUser($user);
-		$userData[AccountManager::PROPERTY_EMAIL]['value'] = $mailAddress;
-
-		try {
-			$this->saveUserSettings($user, $userData);
-			return new DataResponse(
-				[
-					'status' => 'success',
-					'data' => [
-						'username' => $id,
-						'mailAddress' => $mailAddress,
-						'message' => (string) $this->l10n->t('Email saved')
-					]
-				],
-				Http::STATUS_OK
-			);
-		} catch (ForbiddenException $e) {
-			return new DataResponse([
-				'status' => 'error',
-				'data' => [
-					'message' => $e->getMessage()
-				],
-			]);
-		}
-	}
+    /** @var IL10N */
+    private $l10n;
+    /** @var IUserSession */
+    private $userSession;
+    /** @var bool */
+    private $isAdmin;
+    /** @var IUserManager */
+    private $userManager;
+    /** @var IGroupManager */
+    private $groupManager;
+    /** @var IConfig */
+    private $config;
+    /** @var ILogger */
+    private $log;
+    /** @var IMailer */
+    private $mailer;
+    /** @var bool contains the state of the encryption app */
+    private $isEncryptionAppEnabled;
+    /** @var bool contains the state of the admin recovery setting */
+    private $isRestoreEnabled = false;
+    /** @var IAvatarManager */
+    private $avatarManager;
+    /** @var AccountManager */
+    private $accountManager;
+    /** @var ISecureRandom */
+    private $secureRandom;
+    /** @var NewUserMailHelper */
+    private $newUserMailHelper;
+    /** @var ITimeFactory */
+    private $timeFactory;
+    /** @var ICrypto */
+    private $crypto;
+    /** @var Manager */
+    private $keyManager;
+    /** @var IJobList */
+    private $jobList;
+
+    /**
+     * @param string $appName
+     * @param IRequest $request
+     * @param IUserManager $userManager
+     * @param IGroupManager $groupManager
+     * @param IUserSession $userSession
+     * @param IConfig $config
+     * @param bool $isAdmin
+     * @param IL10N $l10n
+     * @param ILogger $log
+     * @param IMailer $mailer
+     * @param IURLGenerator $urlGenerator
+     * @param IAppManager $appManager
+     * @param IAvatarManager $avatarManager
+     * @param AccountManager $accountManager
+     * @param ISecureRandom $secureRandom
+     * @param NewUserMailHelper $newUserMailHelper
+     * @param ITimeFactory $timeFactory
+     * @param ICrypto $crypto
+     * @param Manager $keyManager
+     * @param IJobList $jobList
+     */
+    public function __construct($appName,
+                                IRequest $request,
+                                IUserManager $userManager,
+                                IGroupManager $groupManager,
+                                IUserSession $userSession,
+                                IConfig $config,
+                                $isAdmin,
+                                IL10N $l10n,
+                                ILogger $log,
+                                IMailer $mailer,
+                                IURLGenerator $urlGenerator,
+                                IAppManager $appManager,
+                                IAvatarManager $avatarManager,
+                                AccountManager $accountManager,
+                                ISecureRandom $secureRandom,
+                                NewUserMailHelper $newUserMailHelper,
+                                ITimeFactory $timeFactory,
+                                ICrypto $crypto,
+                                Manager $keyManager,
+                                IJobList $jobList) {
+        parent::__construct($appName, $request);
+        $this->userManager = $userManager;
+        $this->groupManager = $groupManager;
+        $this->userSession = $userSession;
+        $this->config = $config;
+        $this->isAdmin = $isAdmin;
+        $this->l10n = $l10n;
+        $this->log = $log;
+        $this->mailer = $mailer;
+        $this->avatarManager = $avatarManager;
+        $this->accountManager = $accountManager;
+        $this->secureRandom = $secureRandom;
+        $this->newUserMailHelper = $newUserMailHelper;
+        $this->timeFactory = $timeFactory;
+        $this->crypto = $crypto;
+        $this->keyManager = $keyManager;
+        $this->jobList = $jobList;
+
+        // check for encryption state - TODO see formatUserForIndex
+        $this->isEncryptionAppEnabled = $appManager->isEnabledForUser('encryption');
+        if($this->isEncryptionAppEnabled) {
+            // putting this directly in empty is possible in PHP 5.5+
+            $result = $config->getAppValue('encryption', 'recoveryAdminEnabled', 0);
+            $this->isRestoreEnabled = !empty($result);
+        }
+    }
+
+    /**
+     * @param IUser $user
+     * @param array $userGroups
+     * @return array
+     */
+    private function formatUserForIndex(IUser $user, array $userGroups = null) {
+
+        // TODO: eliminate this encryption specific code below and somehow
+        // hook in additional user info from other apps
+
+        // recovery isn't possible if admin or user has it disabled and encryption
+        // is enabled - so we eliminate the else paths in the conditional tree
+        // below
+        $restorePossible = false;
+
+        if ($this->isEncryptionAppEnabled) {
+            if ($this->isRestoreEnabled) {
+                // check for the users recovery setting
+                $recoveryMode = $this->config->getUserValue($user->getUID(), 'encryption', 'recoveryEnabled', '0');
+                // method call inside empty is possible with PHP 5.5+
+                $recoveryModeEnabled = !empty($recoveryMode);
+                if ($recoveryModeEnabled) {
+                    // user also has recovery mode enabled
+                    $restorePossible = true;
+                }
+            }
+        } else {
+            // recovery is possible if encryption is disabled (plain files are
+            // available)
+            $restorePossible = true;
+        }
+
+        $subAdminGroups = $this->groupManager->getSubAdmin()->getSubAdminsGroups($user);
+        foreach($subAdminGroups as $key => $subAdminGroup) {
+            $subAdminGroups[$key] = $subAdminGroup->getGID();
+        }
+
+        $displayName = $user->getEMailAddress();
+        if (is_null($displayName)) {
+            $displayName = '';
+        }
+
+        $avatarAvailable = false;
+        try {
+            $avatarAvailable = $this->avatarManager->getAvatar($user->getUID())->exists();
+        } catch (\Exception $e) {
+            //No avatar yet
+        }
+
+        return [
+            'name' => $user->getUID(),
+            'displayname' => $user->getDisplayName(),
+            'groups' => (empty($userGroups)) ? $this->groupManager->getUserGroupIds($user) : $userGroups,
+            'subadmin' => $subAdminGroups,
+            'quota' => $user->getQuota(),
+            'storageLocation' => $user->getHome(),
+            'lastLogin' => $user->getLastLogin() * 1000,
+            'backend' => $user->getBackendClassName(),
+            'email' => $displayName,
+            'isRestoreDisabled' => !$restorePossible,
+            'isAvatarAvailable' => $avatarAvailable,
+            'isEnabled' => $user->isEnabled(),
+        ];
+    }
+
+    /**
+     * @param array $userIDs Array with schema [$uid => $displayName]
+     * @return IUser[]
+     */
+    private function getUsersForUID(array $userIDs) {
+        $users = [];
+        foreach ($userIDs as $uid => $displayName) {
+            $users[$uid] = $this->userManager->get($uid);
+        }
+        return $users;
+    }
+
+    /**
+     * @NoAdminRequired
+     *
+     * @param int $offset
+     * @param int $limit
+     * @param string $gid GID to filter for
+     * @param string $pattern Pattern to search for in the username
+     * @param string $backend Backend to filter for (class-name)
+     * @return DataResponse
+     *
+     * TODO: Tidy up and write unit tests - code is mainly static method calls
+     */
+    public function index($offset = 0, $limit = 10, $gid = '', $pattern = '', $backend = '') {
+        // Remove backends
+        if(!empty($backend)) {
+            $activeBackends = $this->userManager->getBackends();
+            $this->userManager->clearBackends();
+            foreach($activeBackends as $singleActiveBackend) {
+                if($backend === get_class($singleActiveBackend)) {
+                    $this->userManager->registerBackend($singleActiveBackend);
+                    break;
+                }
+            }
+        }
+
+        $users = [];
+        if ($this->isAdmin) {
+            if($gid !== '' && $gid !== '_disabledUsers') {
+                $batch = $this->getUsersForUID($this->groupManager->displayNamesInGroup($gid, $pattern, $limit, $offset));
+            } else {
+                $batch = $this->userManager->search($pattern, $limit, $offset);
+            }
+
+            foreach ($batch as $user) {
+                if( ($gid !== '_disabledUsers' && $user->isEnabled()) ||
+                    ($gid === '_disabledUsers' && !$user->isEnabled())
+                ) {
+                    $users[] = $this->formatUserForIndex($user);
+                }
+            }
+
+        } else {
+            $subAdminOfGroups = $this->groupManager->getSubAdmin()->getSubAdminsGroups($this->userSession->getUser());
+            // New class returns IGroup[] so convert back
+            $gids = [];
+            foreach ($subAdminOfGroups as $group) {
+                $gids[] = $group->getGID();
+            }
+            $subAdminOfGroups = $gids;
+
+            // Set the $gid parameter to an empty value if the subadmin has no rights to access a specific group
+            if($gid !== '' && $gid !== '_disabledUsers' && !in_array($gid, $subAdminOfGroups)) {
+                $gid = '';
+            }
+
+            // Batch all groups the user is subadmin of when a group is specified
+            $batch = [];
+            if($gid === '') {
+                foreach($subAdminOfGroups as $group) {
+                    $groupUsers = $this->groupManager->displayNamesInGroup($group, $pattern, $limit, $offset);
+
+                    foreach($groupUsers as $uid => $displayName) {
+                        $batch[$uid] = $displayName;
+                    }
+                }
+            } else {
+                $batch = $this->groupManager->displayNamesInGroup($gid, $pattern, $limit, $offset);
+            }
+            $batch = $this->getUsersForUID($batch);
+
+            foreach ($batch as $user) {
+                // Only add the groups, this user is a subadmin of
+                $userGroups = array_values(array_intersect(
+                    $this->groupManager->getUserGroupIds($user),
+                    $subAdminOfGroups
+                ));
+                if( ($gid !== '_disabledUsers' && $user->isEnabled()) ||
+                    ($gid === '_disabledUsers' && !$user->isEnabled())
+                ) {
+                    $users[] = $this->formatUserForIndex($user, $userGroups);
+                }
+            }
+        }
+
+        return new DataResponse($users);
+    }
+
+    /**
+     * @NoAdminRequired
+     * @PasswordConfirmationRequired
+     *
+     * @param string $username
+     * @param string $password
+     * @param array $groups
+     * @param string $email
+     * @return DataResponse
+     */
+    public function create($username, $password, array $groups=[], $email='') {
+        if($email !== '' && !$this->mailer->validateMailAddress($email)) {
+            return new DataResponse(
+                [
+                    'message' => (string)$this->l10n->t('Invalid mail address')
+                ],
+                Http::STATUS_UNPROCESSABLE_ENTITY
+            );
+        }
+
+        $currentUser = $this->userSession->getUser();
+
+        if (!$this->isAdmin) {
+            if (!empty($groups)) {
+                foreach ($groups as $key => $group) {
+                    $groupObject = $this->groupManager->get($group);
+                    if($groupObject === null) {
+                        unset($groups[$key]);
+                        continue;
+                    }
+
+                    if (!$this->groupManager->getSubAdmin()->isSubAdminofGroup($currentUser, $groupObject)) {
+                        unset($groups[$key]);
+                    }
+                }
+            }
+
+            if (empty($groups)) {
+                return new DataResponse(
+                    [
+                        'message' => $this->l10n->t('No valid group selected'),
+                    ],
+                    Http::STATUS_FORBIDDEN
+                );
+            }
+        }
+
+        if ($this->userManager->userExists($username)) {
+            return new DataResponse(
+                [
+                    'message' => (string)$this->l10n->t('A user with that name already exists.')
+                ],
+                Http::STATUS_CONFLICT
+            );
+        }
+
+        $generatePasswordResetToken = false;
+        if ($password === '') {
+            if ($email === '') {
+                return new DataResponse(
+                    [
+                        'message' => (string)$this->l10n->t('To send a password link to the user an email address is required.')
+                    ],
+                    Http::STATUS_UNPROCESSABLE_ENTITY
+                );
+            }
+
+            $password = $this->secureRandom->generate(32);
+            $generatePasswordResetToken = true;
+        }
+
+        try {
+            $user = $this->userManager->createUser($username, $password);
+        } catch (\Exception $exception) {
+            $message = $exception->getMessage();
+            if (!$message) {
+                $message = $this->l10n->t('Unable to create user.');
+            }
+            return new DataResponse(
+                [
+                    'message' => (string) $message,
+                ],
+                Http::STATUS_FORBIDDEN
+            );
+        }
+
+        if($user instanceof IUser) {
+            if($groups !== null) {
+                foreach($groups as $groupName) {
+                    $group = $this->groupManager->get($groupName);
+
+                    if(empty($group)) {
+                        $group = $this->groupManager->createGroup($groupName);
+                    }
+                    $group->addUser($user);
+                }
+            }
+            /**
+             * Send new user mail only if a mail is set
+             */
+            if($email !== '') {
+                $user->setEMailAddress($email);
+                try {
+                    $emailTemplate = $this->newUserMailHelper->generateTemplate($user, $generatePasswordResetToken);
+                    $this->newUserMailHelper->sendMail($user, $emailTemplate);
+                } catch(\Exception $e) {
+                    $this->log->error("Can't send new user mail to $email: " . $e->getMessage(), ['app' => 'settings']);
+                }
+            }
+            // fetch users groups
+            $userGroups = $this->groupManager->getUserGroupIds($user);
+
+            return new DataResponse(
+                $this->formatUserForIndex($user, $userGroups),
+                Http::STATUS_CREATED
+            );
+        }
+
+        return new DataResponse(
+            [
+                'message' => (string) $this->l10n->t('Unable to create user.')
+            ],
+            Http::STATUS_FORBIDDEN
+        );
+
+    }
+
+    /**
+     * @NoAdminRequired
+     * @PasswordConfirmationRequired
+     *
+     * @param string $id
+     * @return DataResponse
+     */
+    public function destroy($id) {
+        $userId = $this->userSession->getUser()->getUID();
+        $user = $this->userManager->get($id);
+
+        if($userId === $id) {
+            return new DataResponse(
+                [
+                    'status' => 'error',
+                    'data' => [
+                        'message' => (string) $this->l10n->t('Unable to delete user.')
+                    ]
+                ],
+                Http::STATUS_FORBIDDEN
+            );
+        }
+
+        if(!$this->isAdmin && !$this->groupManager->getSubAdmin()->isUserAccessible($this->userSession->getUser(), $user)) {
+            return new DataResponse(
+                [
+                    'status' => 'error',
+                    'data' => [
+                        'message' => (string)$this->l10n->t('Authentication error')
+                    ]
+                ],
+                Http::STATUS_FORBIDDEN
+            );
+        }
+
+        if($user) {
+            if($user->delete()) {
+                return new DataResponse(
+                    [
+                        'status' => 'success',
+                        'data' => [
+                            'username' => $id
+                        ]
+                    ],
+                    Http::STATUS_NO_CONTENT
+                );
+            }
+        }
+
+        return new DataResponse(
+            [
+                'status' => 'error',
+                'data' => [
+                    'message' => (string)$this->l10n->t('Unable to delete user.')
+                ]
+            ],
+            Http::STATUS_FORBIDDEN
+        );
+    }
+
+    /**
+     * @NoAdminRequired
+     *
+     * @param string $id
+     * @param int $enabled
+     * @return DataResponse
+     */
+    public function setEnabled($id, $enabled) {
+        $enabled = (bool)$enabled;
+        if($enabled) {
+            $errorMsgGeneral = (string) $this->l10n->t('Error while enabling user.');
+        } else {
+            $errorMsgGeneral = (string) $this->l10n->t('Error while disabling user.');
+        }
+
+        $userId = $this->userSession->getUser()->getUID();
+        $user = $this->userManager->get($id);
+
+        if ($userId === $id) {
+            return new DataResponse(
+                [
+                    'status' => 'error',
+                    'data' => [
+                        'message' => $errorMsgGeneral
+                    ]
+                ], Http::STATUS_FORBIDDEN
+            );
+        }
+
+        if($user) {
+            if (!$this->isAdmin && !$this->groupManager->getSubAdmin()->isUserAccessible($this->userSession->getUser(), $user)) {
+                return new DataResponse(
+                    [
+                        'status' => 'error',
+                        'data' => [
+                            'message' => (string) $this->l10n->t('Authentication error')
+                        ]
+                    ],
+                    Http::STATUS_FORBIDDEN
+                );
+            }
+
+            $user->setEnabled($enabled);
+            return new DataResponse(
+                [
+                    'status' => 'success',
+                    'data' => [
+                        'username' => $id,
+                        'enabled' => $enabled
+                    ]
+                ]
+            );
+        } else {
+            return new DataResponse(
+                [
+                    'status' => 'error',
+                    'data' => [
+                        'message' => $errorMsgGeneral
+                    ]
+                ],
+                Http::STATUS_FORBIDDEN
+            );
+        }
+
+    }
+
+    /**
+     * Set the mail address of a user
+     *
+     * @NoAdminRequired
+     * @NoSubadminRequired
+     * @PasswordConfirmationRequired
+     *
+     * @param string $account
+     * @param bool $onlyVerificationCode only return verification code without updating the data
+     * @return DataResponse
+     */
+    public function getVerificationCode($account, $onlyVerificationCode) {
+
+        $user = $this->userSession->getUser();
+
+        if ($user === null) {
+            return new DataResponse([], Http::STATUS_BAD_REQUEST);
+        }
+
+        $accountData = $this->accountManager->getUser($user);
+        $cloudId = $user->getCloudId();
+        $message = "Use my Federated Cloud ID to share with me: " . $cloudId;
+        $signature = $this->signMessage($user, $message);
+
+        $code = $message . ' ' . $signature;
+        $codeMd5 = $message . ' ' . md5($signature);
+
+        switch ($account) {
+            case 'verify-twitter':
+                $accountData[AccountManager::PROPERTY_TWITTER]['verified'] = AccountManager::VERIFICATION_IN_PROGRESS;
+                $msg = $this->l10n->t('In order to verify your Twitter account, post the following tweet on Twitter (please make sure to post it without any line breaks):');
+                $code = $codeMd5;
+                $type = AccountManager::PROPERTY_TWITTER;
+                $data = $accountData[AccountManager::PROPERTY_TWITTER]['value'];
+                $accountData[AccountManager::PROPERTY_TWITTER]['signature'] = $signature;
+                break;
+            case 'verify-website':
+                $accountData[AccountManager::PROPERTY_WEBSITE]['verified'] = AccountManager::VERIFICATION_IN_PROGRESS;
+                $msg = $this->l10n->t('In order to verify your Website, store the following content in your web-root at \'.well-known/CloudIdVerificationCode.txt\' (please make sure that the complete text is in one line):');
+                $type = AccountManager::PROPERTY_WEBSITE;
+                $data = $accountData[AccountManager::PROPERTY_WEBSITE]['value'];
+                $accountData[AccountManager::PROPERTY_WEBSITE]['signature'] = $signature;
+                break;
+            default:
+                return new DataResponse([], Http::STATUS_BAD_REQUEST);
+        }
+
+        if ($onlyVerificationCode === false) {
+            $this->accountManager->updateUser($user, $accountData);
+
+            $this->jobList->add('OC\Settings\BackgroundJobs\VerifyUserData',
+                [
+                    'verificationCode' => $code,
+                    'data' => $data,
+                    'type' => $type,
+                    'uid' => $user->getUID(),
+                    'try' => 0,
+                    'lastRun' => $this->getCurrentTime()
+                ]
+            );
+        }
+
+        return new DataResponse(['msg' => $msg, 'code' => $code]);
+    }
+
+    /**
+     * get current timestamp
+     *
+     * @return int
+     */
+    protected function getCurrentTime() {
+        return time();
+    }
+
+    /**
+     * sign message with users private key
+     *
+     * @param IUser $user
+     * @param string $message
+     *
+     * @return string base64 encoded signature
+     */
+    protected function signMessage(IUser $user, $message) {
+        $privateKey = $this->keyManager->getKey($user)->getPrivate();
+        openssl_sign(json_encode($message), $signature, $privateKey, OPENSSL_ALGO_SHA512);
+        $signatureBase64 = base64_encode($signature);
+
+        return $signatureBase64;
+    }
+
+    /**
+     * @NoAdminRequired
+     * @NoSubadminRequired
+     * @PasswordConfirmationRequired
+     *
+     * @param string $avatarScope
+     * @param string $displayname
+     * @param string $displaynameScope
+     * @param string $phone
+     * @param string $phoneScope
+     * @param string $email
+     * @param string $emailScope
+     * @param string $website
+     * @param string $websiteScope
+     * @param string $address
+     * @param string $addressScope
+     * @param string $twitter
+     * @param string $twitterScope
+     * @return DataResponse
+     */
+    public function setUserSettings($avatarScope,
+                                    $displayname,
+                                    $displaynameScope,
+                                    $phone,
+                                    $phoneScope,
+                                    $email,
+                                    $emailScope,
+                                    $website,
+                                    $websiteScope,
+                                    $address,
+                                    $addressScope,
+                                    $twitter,
+                                    $twitterScope
+    ) {
+
+        if (!empty($email) && !$this->mailer->validateMailAddress($email)) {
+            return new DataResponse(
+                [
+                    'status' => 'error',
+                    'data' => [
+                        'message' => (string) $this->l10n->t('Invalid mail address')
+                    ]
+                ],
+                Http::STATUS_UNPROCESSABLE_ENTITY
+            );
+        }
+
+        $data = [
+            AccountManager::PROPERTY_AVATAR =>  ['scope' => $avatarScope],
+            AccountManager::PROPERTY_DISPLAYNAME => ['value' => $displayname, 'scope' => $displaynameScope],
+            AccountManager::PROPERTY_EMAIL=> ['value' => $email, 'scope' => $emailScope],
+            AccountManager::PROPERTY_WEBSITE => ['value' => $website, 'scope' => $websiteScope],
+            AccountManager::PROPERTY_ADDRESS => ['value' => $address, 'scope' => $addressScope],
+            AccountManager::PROPERTY_PHONE => ['value' => $phone, 'scope' => $phoneScope],
+            AccountManager::PROPERTY_TWITTER => ['value' => $twitter, 'scope' => $twitterScope]
+        ];
+
+        $user = $this->userSession->getUser();
+
+        try {
+            $this->saveUserSettings($user, $data);
+            return new DataResponse(
+                [
+                    'status' => 'success',
+                    'data' => [
+                        'userId' => $user->getUID(),
+                        'avatarScope' => $avatarScope,
+                        'displayname' => $displayname,
+                        'displaynameScope' => $displaynameScope,
+                        'email' => $email,
+                        'emailScope' => $emailScope,
+                        'website' => $website,
+                        'websiteScope' => $websiteScope,
+                        'address' => $address,
+                        'addressScope' => $addressScope,
+                        'message' => (string) $this->l10n->t('Settings saved')
+                    ]
+                ],
+                Http::STATUS_OK
+            );
+        } catch (ForbiddenException $e) {
+            return new DataResponse([
+                'status' => 'error',
+                'data' => [
+                    'message' => $e->getMessage()
+                ],
+            ]);
+        }
+
+    }
+
+
+    /**
+     * update account manager with new user data
+     *
+     * @param IUser $user
+     * @param array $data
+     * @throws ForbiddenException
+     */
+    protected function saveUserSettings(IUser $user, $data) {
+
+        // keep the user back-end up-to-date with the latest display name and email
+        // address
+        $oldDisplayName = $user->getDisplayName();
+        $oldDisplayName = is_null($oldDisplayName) ? '' : $oldDisplayName;
+        if (isset($data[AccountManager::PROPERTY_DISPLAYNAME]['value'])
+            && $oldDisplayName !== $data[AccountManager::PROPERTY_DISPLAYNAME]['value']
+        ) {
+            $result = $user->setDisplayName($data[AccountManager::PROPERTY_DISPLAYNAME]['value']);
+            if ($result === false) {
+                throw new ForbiddenException($this->l10n->t('Unable to change full name'));
+            }
+        }
+
+        $oldEmailAddress = $user->getEMailAddress();
+        $oldEmailAddress = is_null($oldEmailAddress) ? '' : $oldEmailAddress;
+        if (isset($data[AccountManager::PROPERTY_EMAIL]['value'])
+            && $oldEmailAddress !== $data[AccountManager::PROPERTY_EMAIL]['value']
+        ) {
+            // this is the only permission a backend provides and is also used
+            // for the permission of setting a email address
+            if (!$user->canChangeDisplayName()) {
+                throw new ForbiddenException($this->l10n->t('Unable to change email address'));
+            }
+            $user->setEMailAddress($data[AccountManager::PROPERTY_EMAIL]['value']);
+        }
+
+        $this->accountManager->updateUser($user, $data);
+    }
+
+    /**
+     * Count all unique users visible for the current admin/subadmin.
+     *
+     * @NoAdminRequired
+     *
+     * @return DataResponse
+     */
+    public function stats() {
+        $userCount = 0;
+        if ($this->isAdmin) {
+            $countByBackend = $this->userManager->countUsers();
+
+            if (!empty($countByBackend)) {
+                foreach ($countByBackend as $count) {
+                    $userCount += $count;
+                }
+            }
+        } else {
+            $groups = $this->groupManager->getSubAdmin()->getSubAdminsGroups($this->userSession->getUser());
+
+            $uniqueUsers = [];
+            foreach ($groups as $group) {
+                foreach($group->getUsers() as $uid => $displayName) {
+                    $uniqueUsers[$uid] = true;
+                }
+            }
+
+            $userCount = count($uniqueUsers);
+        }
+
+        return new DataResponse(
+            [
+                'totalUsers' => $userCount
+            ]
+        );
+    }
+
+
+    /**
+     * Set the displayName of a user
+     *
+     * @NoAdminRequired
+     * @NoSubadminRequired
+     * @PasswordConfirmationRequired
+     * @todo merge into saveUserSettings
+     *
+     * @param string $username
+     * @param string $displayName
+     * @return DataResponse
+     */
+    public function setDisplayName($username, $displayName) {
+        $currentUser = $this->userSession->getUser();
+        $user = $this->userManager->get($username);
+
+        if ($user === null ||
+            !$user->canChangeDisplayName() ||
+            (
+                !$this->groupManager->isAdmin($currentUser->getUID()) &&
+                !$this->groupManager->getSubAdmin()->isUserAccessible($currentUser, $user) &&
+                $currentUser->getUID() !== $username
+
+            )
+        ) {
+            return new DataResponse([
+                'status' => 'error',
+                'data' => [
+                    'message' => $this->l10n->t('Authentication error'),
+                ],
+            ]);
+        }
+
+        $userData = $this->accountManager->getUser($user);
+        $userData[AccountManager::PROPERTY_DISPLAYNAME]['value'] = $displayName;
+
+
+        try {
+            $this->saveUserSettings($user, $userData);
+            return new DataResponse([
+                'status' => 'success',
+                'data' => [
+                    'message' => $this->l10n->t('Your full name has been changed.'),
+                    'username' => $username,
+                    'displayName' => $displayName,
+                ],
+            ]);
+        } catch (ForbiddenException $e) {
+            return new DataResponse([
+                'status' => 'error',
+                'data' => [
+                    'message' => $e->getMessage(),
+                    'displayName' => $user->getDisplayName(),
+                ],
+            ]);
+        }
+    }
+
+    /**
+     * Set the mail address of a user
+     *
+     * @NoAdminRequired
+     * @NoSubadminRequired
+     * @PasswordConfirmationRequired
+     *
+     * @param string $id
+     * @param string $mailAddress
+     * @return DataResponse
+     */
+    public function setEMailAddress($id, $mailAddress) {
+        $user = $this->userManager->get($id);
+        if (!$this->isAdmin
+            && !$this->groupManager->getSubAdmin()->isUserAccessible($this->userSession->getUser(), $user)
+        ) {
+            return new DataResponse(
+                [
+                    'status' => 'error',
+                    'data' => [
+                        'message' => (string) $this->l10n->t('Forbidden')
+                    ]
+                ],
+                Http::STATUS_FORBIDDEN
+            );
+        }
+
+        if($mailAddress !== '' && !$this->mailer->validateMailAddress($mailAddress)) {
+            return new DataResponse(
+                [
+                    'status' => 'error',
+                    'data' => [
+                        'message' => (string) $this->l10n->t('Invalid mail address')
+                    ]
+                ],
+                Http::STATUS_UNPROCESSABLE_ENTITY
+            );
+        }
+
+        if (!$user) {
+            return new DataResponse(
+                [
+                    'status' => 'error',
+                    'data' => [
+                        'message' => (string) $this->l10n->t('Invalid user')
+                    ]
+                ],
+                Http::STATUS_UNPROCESSABLE_ENTITY
+            );
+        }
+        // this is the only permission a backend provides and is also used
+        // for the permission of setting a email address
+        if (!$user->canChangeDisplayName()) {
+            return new DataResponse(
+                [
+                    'status' => 'error',
+                    'data' => [
+                        'message' => (string) $this->l10n->t('Unable to change mail address')
+                    ]
+                ],
+                Http::STATUS_FORBIDDEN
+            );
+        }
+
+        $userData = $this->accountManager->getUser($user);
+        $userData[AccountManager::PROPERTY_EMAIL]['value'] = $mailAddress;
+
+        try {
+            $this->saveUserSettings($user, $userData);
+            return new DataResponse(
+                [
+                    'status' => 'success',
+                    'data' => [
+                        'username' => $id,
+                        'mailAddress' => $mailAddress,
+                        'message' => (string) $this->l10n->t('Email saved')
+                    ]
+                ],
+                Http::STATUS_OK
+            );
+        } catch (ForbiddenException $e) {
+            return new DataResponse([
+                'status' => 'error',
+                'data' => [
+                    'message' => $e->getMessage()
+                ],
+            ]);
+        }
+    }
 
 }