Move dav app to PSR-4 (#24527)

* Move Application to correct namespace and PSR-4 it

* Move dav app to PSR-4

11 files changed, 0 insertions, 2198 deletions

diff --git a/apps/dav/lib/carddav/addressbook.php b/apps/dav/lib/carddav/addressbook.php
deleted file mode 100644
index 8b1b600ec3d..00000000000
--- a/apps/dav/lib/carddav/addressbook.php
+++ /dev/null
@@ -1,182 +0,0 @@
-<?php
-/**
- * @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 OCA\DAV\CardDAV;
-
-use OCA\DAV\DAV\Sharing\IShareable;
-use Sabre\CardDAV\Card;
-use Sabre\DAV\Exception\Forbidden;
-use Sabre\DAV\Exception\NotFound;
-use Sabre\DAV\PropPatch;
-
-class AddressBook extends \Sabre\CardDAV\AddressBook implements IShareable {
-
-	/**
-	 * Updates the list of shares.
-	 *
-	 * The first array is a list of people that are to be added to the
-	 * addressbook.
-	 *
-	 * Every element in the add array has the following properties:
-	 *   * href - A url. Usually a mailto: address
-	 *   * commonName - Usually a first and last name, or false
-	 *   * summary - A description of the share, can also be false
-	 *   * readOnly - A boolean value
-	 *
-	 * Every element in the remove array is just the address string.
-	 *
-	 * @param array $add
-	 * @param array $remove
-	 * @return void
-	 */
-	function updateShares(array $add, array $remove) {
-		/** @var CardDavBackend $carddavBackend */
-		$carddavBackend = $this->carddavBackend;
-		$carddavBackend->updateShares($this, $add, $remove);
-	}
-
-	/**
-	 * Returns the list of people whom this addressbook is shared with.
-	 *
-	 * Every element in this array should have the following properties:
-	 *   * href - Often a mailto: address
-	 *   * commonName - Optional, for example a first + last name
-	 *   * status - See the Sabre\CalDAV\SharingPlugin::STATUS_ constants.
-	 *   * readOnly - boolean
-	 *   * summary - Optional, a description for the share
-	 *
-	 * @return array
-	 */
-	function getShares() {
-		/** @var CardDavBackend $carddavBackend */
-		$carddavBackend = $this->carddavBackend;
-		return $carddavBackend->getShares($this->getResourceId());
-	}
-
-	function getACL() {
-		$acl =  [
-			[
-				'privilege' => '{DAV:}read',
-				'principal' => $this->getOwner(),
-				'protected' => true,
-			]];
-		$acl[] = [
-				'privilege' => '{DAV:}write',
-				'principal' => $this->getOwner(),
-				'protected' => true,
-			];
-		if ($this->getOwner() !== parent::getOwner()) {
-			$acl[] =  [
-					'privilege' => '{DAV:}read',
-					'principal' => parent::getOwner(),
-					'protected' => true,
-				];
-			if ($this->canWrite()) {
-				$acl[] = [
-					'privilege' => '{DAV:}write',
-					'principal' => parent::getOwner(),
-					'protected' => true,
-				];
-			}
-		}
-		if ($this->getOwner() === 'principals/system/system') {
-			$acl[] = [
-					'privilege' => '{DAV:}read',
-					'principal' => '{DAV:}authenticated',
-					'protected' => true,
-			];
-		}
-
-		/** @var CardDavBackend $carddavBackend */
-		$carddavBackend = $this->carddavBackend;
-		return $carddavBackend->applyShareAcl($this->getResourceId(), $acl);
-	}
-
-	function getChildACL() {
-		return $this->getACL();
-	}
-
-	function getChild($name) {
-
-		$obj = $this->carddavBackend->getCard($this->addressBookInfo['id'], $name);
-		if (!$obj) {
-			throw new NotFound('Card not found');
-		}
-		$obj['acl'] = $this->getChildACL();
-		return new Card($this->carddavBackend, $this->addressBookInfo, $obj);
-
-	}
-
-	/**
-	 * @return int
-	 */
-	public function getResourceId() {
-		return $this->addressBookInfo['id'];
-	}
-
-	function getOwner() {
-		if (isset($this->addressBookInfo['{http://owncloud.org/ns}owner-principal'])) {
-			return $this->addressBookInfo['{http://owncloud.org/ns}owner-principal'];
-		}
-		return parent::getOwner();
-	}
-
-	function delete() {
-		if (isset($this->addressBookInfo['{http://owncloud.org/ns}owner-principal'])) {
-			$principal = 'principal:' . parent::getOwner();
-			$shares = $this->getShares();
-			$shares = array_filter($shares, function($share) use ($principal){
-				return $share['href'] === $principal;
-			});
-			if (empty($shares)) {
-				throw new Forbidden();
-			}
-
-			/** @var CardDavBackend $cardDavBackend */
-			$cardDavBackend = $this->carddavBackend;
-			$cardDavBackend->updateShares($this, [], [
-				'href' => $principal
-			]);
-			return;
-		}
-		parent::delete();
-	}
-
-	function propPatch(PropPatch $propPatch) {
-		if (isset($this->addressBookInfo['{http://owncloud.org/ns}owner-principal'])) {
-			throw new Forbidden();
-		}
-		parent::propPatch($propPatch);
-	}
-
-	public function getContactsGroups() {
-		/** @var CardDavBackend $cardDavBackend */
-		$cardDavBackend = $this->carddavBackend;
-
-		return $cardDavBackend->collectCardProperties($this->getResourceId(), 'CATEGORIES');
-	}
-
-	private function canWrite() {
-		if (isset($this->addressBookInfo['{http://owncloud.org/ns}read-only'])) {
-			return !$this->addressBookInfo['{http://owncloud.org/ns}read-only'];
-		}
-		return true;
-	}
-}
diff --git a/apps/dav/lib/carddav/addressbookimpl.php b/apps/dav/lib/carddav/addressbookimpl.php
deleted file mode 100644
index 8b29d6d5c0c..00000000000
--- a/apps/dav/lib/carddav/addressbookimpl.php
+++ /dev/null
@@ -1,224 +0,0 @@
-<?php
-/**
- * @author Björn Schießle <schiessle@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 OCA\DAV\CardDAV;
-
-use OCP\Constants;
-use OCP\IAddressBook;
-use Sabre\VObject\Component\VCard;
-use Sabre\VObject\Property\Text;
-use Sabre\VObject\Reader;
-use Sabre\VObject\UUIDUtil;
-
-class AddressBookImpl implements IAddressBook {
-
-	/** @var CardDavBackend */
-	private $backend;
-
-	/** @var array */
-	private $addressBookInfo;
-
-	/** @var AddressBook */
-	private $addressBook;
-
-	/**
-	 * AddressBookImpl constructor.
-	 *
-	 * @param AddressBook $addressBook
-	 * @param array $addressBookInfo
-	 * @param CardDavBackend $backend
-	 */
-	public function __construct(
-			AddressBook $addressBook,
-			array $addressBookInfo,
-			CardDavBackend $backend) {
-
-		$this->addressBook = $addressBook;
-		$this->addressBookInfo = $addressBookInfo;
-		$this->backend = $backend;
-	}
-
-	/**
-	 * @return string defining the technical unique key
-	 * @since 5.0.0
-	 */
-	public function getKey() {
-		return $this->addressBookInfo['id'];
-	}
-
-	/**
-	 * In comparison to getKey() this function returns a human readable (maybe translated) name
-	 *
-	 * @return mixed
-	 * @since 5.0.0
-	 */
-	public function getDisplayName() {
-		return $this->addressBookInfo['{DAV:}displayname'];
-	}
-
-	/**
-	 * @param string $pattern which should match within the $searchProperties
-	 * @param array $searchProperties defines the properties within the query pattern should match
-	 * @param array $options - for future use. One should always have options!
-	 * @return array an array of contacts which are arrays of key-value-pairs
-	 * @since 5.0.0
-	 */
-	public function search($pattern, $searchProperties, $options) {
-		$result = $this->backend->search($this->getKey(), $pattern, $searchProperties);
-
-		$vCards = [];
-		foreach ($result as $cardData) {
-			$vCards[] = $this->vCard2Array($this->readCard($cardData));
-		}
-
-		return $vCards;
-	}
-
-	/**
-	 * @param array $properties this array if key-value-pairs defines a contact
-	 * @return array an array representing the contact just created or updated
-	 * @since 5.0.0
-	 */
-	public function createOrUpdate($properties) {
-		$update = false;
-		if (!isset($properties['UID'])) { // create a new contact
-			$uid = $this->createUid();
-			$uri = $uid . '.vcf';
-			$vCard = $this->createEmptyVCard($uid);
-		} else { // update existing contact
-			$uid = $properties['UID'];
-			$uri = $uid . '.vcf';
-			$vCardData = $this->backend->getCard($this->getKey(), $uri);
-			$vCard = $this->readCard($vCardData['carddata']);
-			$update = true;
-		}
-
-		foreach ($properties as $key => $value) {
-			$vCard->$key = $vCard->createProperty($key, $value);
-		}
-
-		if ($update) {
-			$this->backend->updateCard($this->getKey(), $uri, $vCard->serialize());
-		} else {
-			$this->backend->createCard($this->getKey(), $uri, $vCard->serialize());
-		}
-
-		return $this->vCard2Array($vCard);
-
-	}
-
-	/**
-	 * @return mixed
-	 * @since 5.0.0
-	 */
-	public function getPermissions() {
-		$permissions = $this->addressBook->getACL();
-		$result = 0;
-		foreach ($permissions as $permission) {
-			switch($permission['privilege']) {
-				case '{DAV:}read':
-					$result |= Constants::PERMISSION_READ;
-					break;
-				case '{DAV:}write':
-					$result |= Constants::PERMISSION_CREATE;
-					$result |= Constants::PERMISSION_UPDATE;
-					break;
-				case '{DAV:}all':
-					$result |= Constants::PERMISSION_ALL;
-					break;
-			}
-		}
-
-		return $result;
-	}
-
-	/**
-	 * @param object $id the unique identifier to a contact
-	 * @return bool successful or not
-	 * @since 5.0.0
-	 */
-	public function delete($id) {
-		$uri = $this->backend->getCardUri($id);
-		return $this->backend->deleteCard($this->addressBookInfo['id'], $uri);
-	}
-
-	/**
-	 * read vCard data into a vCard object
-	 *
-	 * @param string $cardData
-	 * @return VCard
-	 */
-	protected function readCard($cardData) {
-		return  Reader::read($cardData);
-	}
-
-	/**
-	 * create UID for contact
-	 *
-	 * @return string
-	 */
-	protected function createUid() {
-		do {
-			$uid = $this->getUid();
-			$contact = $this->backend->getContact($this->getKey(), $uid . '.vcf');
-		} while (!empty($contact));
-
-		return $uid;
-	}
-
-	/**
-	 * getUid is only there for testing, use createUid instead
-	 */
-	protected function getUid() {
-		return UUIDUtil::getUUID();
-	}
-
-	/**
-	 * create empty vcard
-	 *
-	 * @param string $uid
-	 * @return VCard
-	 */
-	protected function createEmptyVCard($uid) {
-		$vCard = new VCard();
-		$vCard->add(new Text($vCard, 'UID', $uid));
-		return $vCard;
-	}
-
-	/**
-	 * create array with all vCard properties
-	 *
-	 * @param VCard $vCard
-	 * @return array
-	 */
-	protected function vCard2Array(VCard $vCard) {
-		$result = [];
-		foreach ($vCard->children as $property) {
-			$result[$property->name] = $property->getValue();
-		}
-		if ($this->addressBookInfo['principaluri'] === 'principals/system/system' &&
-			$this->addressBookInfo['uri'] === 'system') {
-			$result['isLocalSystemBook'] = true;
-		}
-		return $result;
-	}
-}
diff --git a/apps/dav/lib/carddav/addressbookroot.php b/apps/dav/lib/carddav/addressbookroot.php
deleted file mode 100644
index 99c36c2e767..00000000000
--- a/apps/dav/lib/carddav/addressbookroot.php
+++ /dev/null
@@ -1,54 +0,0 @@
-<?php
-/**
- * @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 OCA\DAV\CardDAV;
-
-class AddressBookRoot extends \Sabre\CardDAV\AddressBookRoot {
-
-	/**
-	 * 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 $principal
-	 * @return \Sabre\DAV\INode
-	 */
-	function getChildForPrincipal(array $principal) {
-
-		return new UserAddressBooks($this->carddavBackend, $principal['uri']);
-
-	}
-
-	function getName() {
-
-		if ($this->principalPrefix === 'principals') {
-			return parent::getName();
-		}
-		// Grabbing all the components of the principal path.
-		$parts = explode('/', $this->principalPrefix);
-
-		// We are only interested in the second part.
-		return $parts[1];
-
-	}
-
-}
diff --git a/apps/dav/lib/carddav/carddavbackend.php b/apps/dav/lib/carddav/carddavbackend.php
deleted file mode 100644
index 28d5ed1ae99..00000000000
--- a/apps/dav/lib/carddav/carddavbackend.php
+++ /dev/null
@@ -1,987 +0,0 @@
-<?php
-/**
- * @author Arthur Schiwon <blizzz@owncloud.com>
- * @author Björn Schießle <schiessle@owncloud.com>
- * @author Joas Schilling <nickvergessen@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 OCA\DAV\CardDAV;
-
-use OCA\DAV\Connector\Sabre\Principal;
-use OCP\DB\QueryBuilder\IQueryBuilder;
-use OCA\DAV\DAV\Sharing\Backend;
-use OCA\DAV\DAV\Sharing\IShareable;
-use OCP\IDBConnection;
-use PDO;
-use Sabre\CardDAV\Backend\BackendInterface;
-use Sabre\CardDAV\Backend\SyncSupport;
-use Sabre\CardDAV\Plugin;
-use Sabre\DAV\Exception\BadRequest;
-use Sabre\HTTP\URLUtil;
-use Sabre\VObject\Component\VCard;
-use Sabre\VObject\Reader;
-use Symfony\Component\EventDispatcher\EventDispatcherInterface;
-use Symfony\Component\EventDispatcher\GenericEvent;
-
-class CardDavBackend implements BackendInterface, SyncSupport {
-
-	/** @var Principal */
-	private $principalBackend;
-
-	/** @var string */
-	private $dbCardsTable = 'cards';
-
-	/** @var string */
-	private $dbCardsPropertiesTable = 'cards_properties';
-
-	/** @var IDBConnection */
-	private $db;
-
-	/** @var Backend */
-	private $sharingBackend;
-
-	/** @var array properties to index */
-	public static $indexProperties = array(
-			'BDAY', 'UID', 'N', 'FN', 'TITLE', 'ROLE', 'NOTE', 'NICKNAME',
-			'ORG', 'CATEGORIES', 'EMAIL', 'TEL', 'IMPP', 'ADR', 'URL', 'GEO', 'CLOUD');
-
-	/** @var EventDispatcherInterface */
-	private $dispatcher;
-
-	/**
-	 * CardDavBackend constructor.
-	 *
-	 * @param IDBConnection $db
-	 * @param Principal $principalBackend
-	 * @param EventDispatcherInterface $dispatcher
-	 */
-	public function __construct(IDBConnection $db,
-								Principal $principalBackend,
-								EventDispatcherInterface $dispatcher = null) {
-		$this->db = $db;
-		$this->principalBackend = $principalBackend;
-		$this->dispatcher = $dispatcher;
-		$this->sharingBackend = new Backend($this->db, $principalBackend, 'addressbook');
-	}
-
-	/**
-	 * Returns the list of address books for a specific user.
-	 *
-	 * Every addressbook should have the following properties:
-	 *   id - an arbitrary unique id
-	 *   uri - the 'basename' part of the url
-	 *   principaluri - Same as the passed parameter
-	 *
-	 * Any additional clark-notation property may be passed besides this. Some
-	 * common ones are :
-	 *   {DAV:}displayname
-	 *   {urn:ietf:params:xml:ns:carddav}addressbook-description
-	 *   {http://calendarserver.org/ns/}getctag
-	 *
-	 * @param string $principalUri
-	 * @return array
-	 */
-	function getAddressBooksForUser($principalUri) {
-		$principalUriOriginal = $principalUri;
-		$principalUri = $this->convertPrincipal($principalUri, true);
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
-			->from('addressbooks')
-			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)));
-
-		$addressBooks = [];
-
-		$result = $query->execute();
-		while($row = $result->fetch()) {
-			$addressBooks[$row['id']] = [
-				'id'  => $row['id'],
-				'uri' => $row['uri'],
-				'principaluri' => $this->convertPrincipal($row['principaluri'], false),
-				'{DAV:}displayname' => $row['displayname'],
-				'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
-				'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			];
-		}
-		$result->closeCursor();
-
-		// query for shared calendars
-		$principals = $this->principalBackend->getGroupMembership($principalUriOriginal, true);
-		$principals[]= $principalUri;
-
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select(['a.id', 'a.uri', 'a.displayname', 'a.principaluri', 'a.description', 'a.synctoken', 's.access'])
-			->from('dav_shares', 's')
-			->join('s', 'addressbooks', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
-			->where($query->expr()->in('s.principaluri', $query->createParameter('principaluri')))
-			->andWhere($query->expr()->eq('s.type', $query->createParameter('type')))
-			->setParameter('type', 'addressbook')
-			->setParameter('principaluri', $principals, IQueryBuilder::PARAM_STR_ARRAY)
-			->execute();
-
-		while($row = $result->fetch()) {
-			list(, $name) = URLUtil::splitPath($row['principaluri']);
-			$uri = $row['uri'] . '_shared_by_' . $name;
-			$displayName = $row['displayname'] . "($name)";
-			if (!isset($addressBooks[$row['id']])) {
-				$addressBooks[$row['id']] = [
-					'id'  => $row['id'],
-					'uri' => $uri,
-					'principaluri' => $principalUri,
-					'{DAV:}displayname' => $displayName,
-					'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
-					'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
-					'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-					'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $row['principaluri'],
-					'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => (int)$row['access'] === Backend::ACCESS_READ,
-				];
-			}
-		}
-		$result->closeCursor();
-
-		return array_values($addressBooks);
-	}
-
-	/**
-	 * @param int $addressBookId
-	 */
-	public function getAddressBookById($addressBookId) {
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
-			->from('addressbooks')
-			->where($query->expr()->eq('id', $query->createNamedParameter($addressBookId)))
-			->execute();
-
-		$row = $result->fetch();
-		$result->closeCursor();
-		if ($row === false) {
-			return null;
-		}
-
-		return [
-			'id'  => $row['id'],
-			'uri' => $row['uri'],
-			'principaluri' => $row['principaluri'],
-			'{DAV:}displayname' => $row['displayname'],
-			'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
-			'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-		];
-	}
-
-	/**
-	 * @param $addressBookUri
-	 * @return array|null
-	 */
-	public function getAddressBooksByUri($principal, $addressBookUri) {
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
-			->from('addressbooks')
-			->where($query->expr()->eq('uri', $query->createNamedParameter($addressBookUri)))
-			->andWhere($query->expr()->eq('principaluri', $query->createNamedParameter($principal)))
-			->setMaxResults(1)
-			->execute();
-
-		$row = $result->fetch();
-		$result->closeCursor();
-		if ($row === false) {
-			return null;
-		}
-
-		return [
-				'id'  => $row['id'],
-				'uri' => $row['uri'],
-				'principaluri' => $row['principaluri'],
-				'{DAV:}displayname' => $row['displayname'],
-				'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
-				'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			];
-	}
-
-	/**
-	 * Updates properties for an address book.
-	 *
-	 * The list of mutations is stored in a Sabre\DAV\PropPatch object.
-	 * To do the actual updates, you must tell this object which properties
-	 * you're going to process with the handle() method.
-	 *
-	 * Calling the handle method is like telling the PropPatch object "I
-	 * promise I can handle updating this property".
-	 *
-	 * Read the PropPatch documentation for more info and examples.
-	 *
-	 * @param string $addressBookId
-	 * @param \Sabre\DAV\PropPatch $propPatch
-	 * @return void
-	 */
-	function updateAddressBook($addressBookId, \Sabre\DAV\PropPatch $propPatch) {
-		$supportedProperties = [
-			'{DAV:}displayname',
-			'{' . Plugin::NS_CARDDAV . '}addressbook-description',
-		];
-
-		$propPatch->handle($supportedProperties, function($mutations) use ($addressBookId) {
-
-			$updates = [];
-			foreach($mutations as $property=>$newValue) {
-
-				switch($property) {
-					case '{DAV:}displayname' :
-						$updates['displayname'] = $newValue;
-						break;
-					case '{' . Plugin::NS_CARDDAV . '}addressbook-description' :
-						$updates['description'] = $newValue;
-						break;
-				}
-			}
-			$query = $this->db->getQueryBuilder();
-			$query->update('addressbooks');
-
-			foreach($updates as $key=>$value) {
-				$query->set($key, $query->createNamedParameter($value));
-			}
-			$query->where($query->expr()->eq('id', $query->createNamedParameter($addressBookId)))
-			->execute();
-
-			$this->addChange($addressBookId, "", 2);
-
-			return true;
-
-		});
-	}
-
-	/**
-	 * Creates a new address book
-	 *
-	 * @param string $principalUri
-	 * @param string $url Just the 'basename' of the url.
-	 * @param array $properties
-	 * @return int
-	 * @throws BadRequest
-	 */
-	function createAddressBook($principalUri, $url, array $properties) {
-		$values = [
-			'displayname' => null,
-			'description' => null,
-			'principaluri' => $principalUri,
-			'uri' => $url,
-			'synctoken' => 1
-		];
-
-		foreach($properties as $property=>$newValue) {
-
-			switch($property) {
-				case '{DAV:}displayname' :
-					$values['displayname'] = $newValue;
-					break;
-				case '{' . Plugin::NS_CARDDAV . '}addressbook-description' :
-					$values['description'] = $newValue;
-					break;
-				default :
-					throw new BadRequest('Unknown property: ' . $property);
-			}
-
-		}
-
-		// Fallback to make sure the displayname is set. Some clients may refuse
-		// to work with addressbooks not having a displayname.
-		if(is_null($values['displayname'])) {
-			$values['displayname'] = $url;
-		}
-
-		$query = $this->db->getQueryBuilder();
-		$query->insert('addressbooks')
-			->values([
-				'uri' => $query->createParameter('uri'),
-				'displayname' => $query->createParameter('displayname'),
-				'description' => $query->createParameter('description'),
-				'principaluri' => $query->createParameter('principaluri'),
-				'synctoken' => $query->createParameter('synctoken'),
-			])
-			->setParameters($values)
-			->execute();
-
-		return $query->getLastInsertId();
-	}
-
-	/**
-	 * Deletes an entire addressbook and all its contents
-	 *
-	 * @param mixed $addressBookId
-	 * @return void
-	 */
-	function deleteAddressBook($addressBookId) {
-		$query = $this->db->getQueryBuilder();
-		$query->delete('cards')
-			->where($query->expr()->eq('addressbookid', $query->createParameter('addressbookid')))
-			->setParameter('addressbookid', $addressBookId)
-			->execute();
-
-		$query->delete('addressbookchanges')
-			->where($query->expr()->eq('addressbookid', $query->createParameter('addressbookid')))
-			->setParameter('addressbookid', $addressBookId)
-			->execute();
-
-		$query->delete('addressbooks')
-			->where($query->expr()->eq('id', $query->createParameter('id')))
-			->setParameter('id', $addressBookId)
-			->execute();
-
-		$this->sharingBackend->deleteAllShares($addressBookId);
-
-		$query->delete($this->dbCardsPropertiesTable)
-			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
-			->execute();
-
-	}
-
-	/**
-	 * Returns all cards for a specific addressbook id.
-	 *
-	 * This method should return the following properties for each card:
-	 *   * carddata - raw vcard data
-	 *   * uri - Some unique url
-	 *   * lastmodified - A unix timestamp
-	 *
-	 * It's recommended to also return the following properties:
-	 *   * etag - A unique etag. This must change every time the card changes.
-	 *   * size - The size of the card in bytes.
-	 *
-	 * If these last two properties are provided, less time will be spent
-	 * calculating them. If they are specified, you can also ommit carddata.
-	 * This may speed up certain requests, especially with large cards.
-	 *
-	 * @param mixed $addressBookId
-	 * @return array
-	 */
-	function getCards($addressBookId) {
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'lastmodified', 'etag', 'size', 'carddata'])
-			->from('cards')
-			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)));
-
-		$cards = [];
-
-		$result = $query->execute();
-		while($row = $result->fetch()) {
-			$row['etag'] = '"' . $row['etag'] . '"';
-			$row['carddata'] = $this->readBlob($row['carddata']);
-			$cards[] = $row;
-		}
-		$result->closeCursor();
-
-		return $cards;
-	}
-
-	/**
-	 * Returns a specific card.
-	 *
-	 * The same set of properties must be returned as with getCards. The only
-	 * exception is that 'carddata' is absolutely required.
-	 *
-	 * If the card does not exist, you must return false.
-	 *
-	 * @param mixed $addressBookId
-	 * @param string $cardUri
-	 * @return array
-	 */
-	function getCard($addressBookId, $cardUri) {
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'lastmodified', 'etag', 'size', 'carddata'])
-			->from('cards')
-			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
-			->andWhere($query->expr()->eq('uri', $query->createNamedParameter($cardUri)))
-			->setMaxResults(1);
-
-		$result = $query->execute();
-		$row = $result->fetch();
-		if (!$row) {
-			return false;
-		}
-		$row['etag'] = '"' . $row['etag'] . '"';
-		$row['carddata'] = $this->readBlob($row['carddata']);
-
-		return $row;
-	}
-
-	/**
-	 * Returns a list of cards.
-	 *
-	 * This method should work identical to getCard, but instead return all the
-	 * cards in the list as an array.
-	 *
-	 * If the backend supports this, it may allow for some speed-ups.
-	 *
-	 * @param mixed $addressBookId
-	 * @param string[] $uris
-	 * @return array
-	 */
-	function getMultipleCards($addressBookId, array $uris) {
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'lastmodified', 'etag', 'size', 'carddata'])
-			->from('cards')
-			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
-			->andWhere($query->expr()->in('uri', $query->createParameter('uri')))
-			->setParameter('uri', $uris, IQueryBuilder::PARAM_STR_ARRAY);
-
-		$cards = [];
-
-		$result = $query->execute();
-		while($row = $result->fetch()) {
-			$row['etag'] = '"' . $row['etag'] . '"';
-			$row['carddata'] = $this->readBlob($row['carddata']);
-			$cards[] = $row;
-		}
-		$result->closeCursor();
-
-		return $cards;
-	}
-
-	/**
-	 * Creates a new card.
-	 *
-	 * The addressbook id will be passed as the first argument. This is the
-	 * same id as it is returned from the getAddressBooksForUser method.
-	 *
-	 * The cardUri is a base uri, and doesn't include the full path. The
-	 * cardData argument is the vcard body, and is passed as a string.
-	 *
-	 * It is possible to return an ETag from this method. This ETag is for the
-	 * newly created resource, and must be enclosed with double quotes (that
-	 * is, the string itself must contain the double quotes).
-	 *
-	 * You should only return the ETag if you store the carddata as-is. If a
-	 * subsequent GET request on the same card does not have the same body,
-	 * byte-by-byte and you did return an ETag here, clients tend to get
-	 * confused.
-	 *
-	 * If you don't return an ETag, you can just return null.
-	 *
-	 * @param mixed $addressBookId
-	 * @param string $cardUri
-	 * @param string $cardData
-	 * @return string
-	 */
-	function createCard($addressBookId, $cardUri, $cardData) {
-		$etag = md5($cardData);
-
-		$query = $this->db->getQueryBuilder();
-		$query->insert('cards')
-			->values([
-				'carddata' => $query->createNamedParameter($cardData, IQueryBuilder::PARAM_LOB),
-				'uri' => $query->createNamedParameter($cardUri),
-				'lastmodified' => $query->createNamedParameter(time()),
-				'addressbookid' => $query->createNamedParameter($addressBookId),
-				'size' => $query->createNamedParameter(strlen($cardData)),
-				'etag' => $query->createNamedParameter($etag),
-			])
-			->execute();
-
-		$this->addChange($addressBookId, $cardUri, 1);
-		$this->updateProperties($addressBookId, $cardUri, $cardData);
-
-		if (!is_null($this->dispatcher)) {
-			$this->dispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::createCard',
-				new GenericEvent(null, [
-					'addressBookId' => $addressBookId,
-					'cardUri' => $cardUri,
-					'cardData' => $cardData]));
-		}
-
-		return '"' . $etag . '"';
-	}
-
-	/**
-	 * Updates a card.
-	 *
-	 * The addressbook id will be passed as the first argument. This is the
-	 * same id as it is returned from the getAddressBooksForUser method.
-	 *
-	 * The cardUri is a base uri, and doesn't include the full path. The
-	 * cardData argument is the vcard body, and is passed as a string.
-	 *
-	 * It is possible to return an ETag from this method. This ETag should
-	 * match that of the updated resource, and must be enclosed with double
-	 * quotes (that is: the string itself must contain the actual quotes).
-	 *
-	 * You should only return the ETag if you store the carddata as-is. If a
-	 * subsequent GET request on the same card does not have the same body,
-	 * byte-by-byte and you did return an ETag here, clients tend to get
-	 * confused.
-	 *
-	 * If you don't return an ETag, you can just return null.
-	 *
-	 * @param mixed $addressBookId
-	 * @param string $cardUri
-	 * @param string $cardData
-	 * @return string
-	 */
-	function updateCard($addressBookId, $cardUri, $cardData) {
-
-		$etag = md5($cardData);
-		$query = $this->db->getQueryBuilder();
-		$query->update('cards')
-			->set('carddata', $query->createNamedParameter($cardData, IQueryBuilder::PARAM_LOB))
-			->set('lastmodified', $query->createNamedParameter(time()))
-			->set('size', $query->createNamedParameter(strlen($cardData)))
-			->set('etag', $query->createNamedParameter($etag))
-			->where($query->expr()->eq('uri', $query->createNamedParameter($cardUri)))
-			->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
-			->execute();
-
-		$this->addChange($addressBookId, $cardUri, 2);
-		$this->updateProperties($addressBookId, $cardUri, $cardData);
-
-		if (!is_null($this->dispatcher)) {
-			$this->dispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::updateCard',
-				new GenericEvent(null, [
-					'addressBookId' => $addressBookId,
-					'cardUri' => $cardUri,
-					'cardData' => $cardData]));
-		}
-
-		return '"' . $etag . '"';
-	}
-
-	/**
-	 * Deletes a card
-	 *
-	 * @param mixed $addressBookId
-	 * @param string $cardUri
-	 * @return bool
-	 */
-	function deleteCard($addressBookId, $cardUri) {
-		try {
-			$cardId = $this->getCardId($addressBookId, $cardUri);
-		} catch (\InvalidArgumentException $e) {
-			$cardId = null;
-		}
-		$query = $this->db->getQueryBuilder();
-		$ret = $query->delete('cards')
-			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
-			->andWhere($query->expr()->eq('uri', $query->createNamedParameter($cardUri)))
-			->execute();
-
-		$this->addChange($addressBookId, $cardUri, 3);
-
-		if (!is_null($this->dispatcher)) {
-			$this->dispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::deleteCard',
-				new GenericEvent(null, [
-					'addressBookId' => $addressBookId,
-					'cardUri' => $cardUri]));
-		}
-
-		if ($ret === 1) {
-			if ($cardId !== null) {
-				$this->purgeProperties($addressBookId, $cardId);
-			}
-			return true;
-		}
-
-		return false;
-	}
-
-	/**
-	 * The getChanges method returns all the changes that have happened, since
-	 * the specified syncToken in the specified address book.
-	 *
-	 * This function should return an array, such as the following:
-	 *
-	 * [
-	 *   'syncToken' => 'The current synctoken',
-	 *   'added'   => [
-	 *      'new.txt',
-	 *   ],
-	 *   'modified'   => [
-	 *      'modified.txt',
-	 *   ],
-	 *   'deleted' => [
-	 *      'foo.php.bak',
-	 *      'old.txt'
-	 *   ]
-	 * ];
-	 *
-	 * The returned syncToken property should reflect the *current* syncToken
-	 * of the calendar, as reported in the {http://sabredav.org/ns}sync-token
-	 * property. This is needed here too, to ensure the operation is atomic.
-	 *
-	 * If the $syncToken argument is specified as null, this is an initial
-	 * sync, and all members should be reported.
-	 *
-	 * The modified property is an array of nodenames that have changed since
-	 * the last token.
-	 *
-	 * The deleted property is an array with nodenames, that have been deleted
-	 * from collection.
-	 *
-	 * The $syncLevel argument is basically the 'depth' of the report. If it's
-	 * 1, you only have to report changes that happened only directly in
-	 * immediate descendants. If it's 2, it should also include changes from
-	 * the nodes below the child collections. (grandchildren)
-	 *
-	 * The $limit argument allows a client to specify how many results should
-	 * be returned at most. If the limit is not specified, it should be treated
-	 * as infinite.
-	 *
-	 * If the limit (infinite or not) is higher than you're willing to return,
-	 * you should throw a Sabre\DAV\Exception\TooMuchMatches() exception.
-	 *
-	 * If the syncToken is expired (due to data cleanup) or unknown, you must
-	 * return null.
-	 *
-	 * The limit is 'suggestive'. You are free to ignore it.
-	 *
-	 * @param string $addressBookId
-	 * @param string $syncToken
-	 * @param int $syncLevel
-	 * @param int $limit
-	 * @return array
-	 */
-	function getChangesForAddressBook($addressBookId, $syncToken, $syncLevel, $limit = null) {
-		// Current synctoken
-		$stmt = $this->db->prepare('SELECT `synctoken` FROM `*PREFIX*addressbooks` WHERE `id` = ?');
-		$stmt->execute([ $addressBookId ]);
-		$currentToken = $stmt->fetchColumn(0);
-
-		if (is_null($currentToken)) return null;
-
-		$result = [
-			'syncToken' => $currentToken,
-			'added'     => [],
-			'modified'  => [],
-			'deleted'   => [],
-		];
-
-		if ($syncToken) {
-
-			$query = "SELECT `uri`, `operation` FROM `*PREFIX*addressbookchanges` WHERE `synctoken` >= ? AND `synctoken` < ? AND `addressbookid` = ? ORDER BY `synctoken`";
-			if ($limit>0) {
-				$query .= " `LIMIT` " . (int)$limit;
-			}
-
-			// Fetching all changes
-			$stmt = $this->db->prepare($query);
-			$stmt->execute([$syncToken, $currentToken, $addressBookId]);
-
-			$changes = [];
-
-			// This loop ensures that any duplicates are overwritten, only the
-			// last change on a node is relevant.
-			while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-
-				$changes[$row['uri']] = $row['operation'];
-
-			}
-
-			foreach($changes as $uri => $operation) {
-
-				switch($operation) {
-					case 1:
-						$result['added'][] = $uri;
-						break;
-					case 2:
-						$result['modified'][] = $uri;
-						break;
-					case 3:
-						$result['deleted'][] = $uri;
-						break;
-				}
-
-			}
-		} else {
-			// No synctoken supplied, this is the initial sync.
-			$query = "SELECT `uri` FROM `*PREFIX*cards` WHERE `addressbookid` = ?";
-			$stmt = $this->db->prepare($query);
-			$stmt->execute([$addressBookId]);
-
-			$result['added'] = $stmt->fetchAll(\PDO::FETCH_COLUMN);
-		}
-		return $result;
-	}
-
-	/**
-	 * Adds a change record to the addressbookchanges table.
-	 *
-	 * @param mixed $addressBookId
-	 * @param string $objectUri
-	 * @param int $operation 1 = add, 2 = modify, 3 = delete
-	 * @return void
-	 */
-	protected function addChange($addressBookId, $objectUri, $operation) {
-		$sql = 'INSERT INTO `*PREFIX*addressbookchanges`(`uri`, `synctoken`, `addressbookid`, `operation`) SELECT ?, `synctoken`, ?, ? FROM `*PREFIX*addressbooks` WHERE `id` = ?';
-		$stmt = $this->db->prepare($sql);
-		$stmt->execute([
-			$objectUri,
-			$addressBookId,
-			$operation,
-			$addressBookId
-		]);
-		$stmt = $this->db->prepare('UPDATE `*PREFIX*addressbooks` SET `synctoken` = `synctoken` + 1 WHERE `id` = ?');
-		$stmt->execute([
-			$addressBookId
-		]);
-	}
-
-	private function readBlob($cardData) {
-		if (is_resource($cardData)) {
-			return stream_get_contents($cardData);
-		}
-
-		return $cardData;
-	}
-
-	/**
-	 * @param IShareable $shareable
-	 * @param string[] $add
-	 * @param string[] $remove
-	 */
-	public function updateShares(IShareable $shareable, $add, $remove) {
-		$this->sharingBackend->updateShares($shareable, $add, $remove);
-	}
-
-	/**
-	 * search contact
-	 *
-	 * @param int $addressBookId
-	 * @param string $pattern which should match within the $searchProperties
-	 * @param array $searchProperties defines the properties within the query pattern should match
-	 * @return array an array of contacts which are arrays of key-value-pairs
-	 */
-	public function search($addressBookId, $pattern, $searchProperties) {
-		$query = $this->db->getQueryBuilder();
-		$query2 = $this->db->getQueryBuilder();
-		$query2->selectDistinct('cp.cardid')->from($this->dbCardsPropertiesTable, 'cp');
-		foreach ($searchProperties as $property) {
-			$query2->orWhere(
-				$query2->expr()->andX(
-					$query2->expr()->eq('cp.name', $query->createNamedParameter($property)),
-					$query2->expr()->ilike('cp.value', $query->createNamedParameter('%' . $this->db->escapeLikeParameter($pattern) . '%'))
-				)
-			);
-		}
-		$query2->andWhere($query2->expr()->eq('cp.addressbookid', $query->createNamedParameter($addressBookId)));
-
-		$query->select('c.carddata')->from($this->dbCardsTable, 'c')
-			->where($query->expr()->in('c.id', $query->createFunction($query2->getSQL())));
-
-		$result = $query->execute();
-		$cards = $result->fetchAll();
-
-		$result->closeCursor();
-
-		return array_map(function($array) {return $this->readBlob($array['carddata']);}, $cards);
-
-	}
-
-	/**
-	 * @param int $bookId
-	 * @param string $name
-	 * @return array
-	 */
-	public function collectCardProperties($bookId, $name) {
-		$query = $this->db->getQueryBuilder();
-		$result = $query->selectDistinct('value')
-			->from($this->dbCardsPropertiesTable)
-			->where($query->expr()->eq('name', $query->createNamedParameter($name)))
-			->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($bookId)))
-			->execute();
-
-		$all = $result->fetchAll(PDO::FETCH_COLUMN);
-		$result->closeCursor();
-
-		return $all;
-	}
-
-	/**
-	 * get URI from a given contact
-	 *
-	 * @param int $id
-	 * @return string
-	 */
-	public function getCardUri($id) {
-		$query = $this->db->getQueryBuilder();
-		$query->select('uri')->from($this->dbCardsTable)
-				->where($query->expr()->eq('id', $query->createParameter('id')))
-				->setParameter('id', $id);
-
-		$result = $query->execute();
-		$uri = $result->fetch();
-		$result->closeCursor();
-
-		if (!isset($uri['uri'])) {
-			throw new \InvalidArgumentException('Card does not exists: ' . $id);
-		}
-
-		return $uri['uri'];
-	}
-
-	/**
-	 * return contact with the given URI
-	 *
-	 * @param int $addressBookId
-	 * @param string $uri
-	 * @returns array
-	 */
-	public function getContact($addressBookId, $uri) {
-		$result = [];
-		$query = $this->db->getQueryBuilder();
-		$query->select('*')->from($this->dbCardsTable)
-				->where($query->expr()->eq('uri', $query->createNamedParameter($uri)))
-				->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)));
-		$queryResult = $query->execute();
-		$contact = $queryResult->fetch();
-		$queryResult->closeCursor();
-
-		if (is_array($contact)) {
-			$result = $contact;
-		}
-
-		return $result;
-	}
-
-	/**
-	 * Returns the list of people whom this address book is shared with.
-	 *
-	 * Every element in this array should have the following properties:
-	 *   * href - Often a mailto: address
-	 *   * commonName - Optional, for example a first + last name
-	 *   * status - See the Sabre\CalDAV\SharingPlugin::STATUS_ constants.
-	 *   * readOnly - boolean
-	 *   * summary - Optional, a description for the share
-	 *
-	 * @return array
-	 */
-	public function getShares($addressBookId) {
-		return $this->sharingBackend->getShares($addressBookId);
-	}
-
-	/**
-	 * update properties table
-	 *
-	 * @param int $addressBookId
-	 * @param string $cardUri
-	 * @param string $vCardSerialized
-	 */
-	protected function updateProperties($addressBookId, $cardUri, $vCardSerialized) {
-		$cardId = $this->getCardId($addressBookId, $cardUri);
-		$vCard = $this->readCard($vCardSerialized);
-
-		$this->purgeProperties($addressBookId, $cardId);
-
-		$query = $this->db->getQueryBuilder();
-		$query->insert($this->dbCardsPropertiesTable)
-			->values(
-				[
-					'addressbookid' => $query->createNamedParameter($addressBookId),
-					'cardid' => $query->createNamedParameter($cardId),
-					'name' => $query->createParameter('name'),
-					'value' => $query->createParameter('value'),
-					'preferred' => $query->createParameter('preferred')
-				]
-			);
-
-		foreach ($vCard->children as $property) {
-			if(!in_array($property->name, self::$indexProperties)) {
-				continue;
-			}
-			$preferred = 0;
-			foreach($property->parameters as $parameter) {
-				if ($parameter->name == 'TYPE' && strtoupper($parameter->getValue()) == 'PREF') {
-					$preferred = 1;
-					break;
-				}
-			}
-			$query->setParameter('name', $property->name);
-			$query->setParameter('value', substr($property->getValue(), 0, 254));
-			$query->setParameter('preferred', $preferred);
-			$query->execute();
-		}
-	}
-
-	/**
-	 * read vCard data into a vCard object
-	 *
-	 * @param string $cardData
-	 * @return VCard
-	 */
-	protected function readCard($cardData) {
-		return  Reader::read($cardData);
-	}
-
-	/**
-	 * delete all properties from a given card
-	 *
-	 * @param int $addressBookId
-	 * @param int $cardId
-	 */
-	protected function purgeProperties($addressBookId, $cardId) {
-		$query = $this->db->getQueryBuilder();
-		$query->delete($this->dbCardsPropertiesTable)
-			->where($query->expr()->eq('cardid', $query->createNamedParameter($cardId)))
-			->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)));
-		$query->execute();
-	}
-
-	/**
-	 * get ID from a given contact
-	 *
-	 * @param int $addressBookId
-	 * @param string $uri
-	 * @return int
-	 */
-	protected function getCardId($addressBookId, $uri) {
-		$query = $this->db->getQueryBuilder();
-		$query->select('id')->from($this->dbCardsTable)
-			->where($query->expr()->eq('uri', $query->createNamedParameter($uri)))
-			->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)));
-
-		$result = $query->execute();
-		$cardIds = $result->fetch();
-		$result->closeCursor();
-
-		if (!isset($cardIds['id'])) {
-			throw new \InvalidArgumentException('Card does not exists: ' . $uri);
-		}
-
-		return (int)$cardIds['id'];
-	}
-
-	/**
-	 * For shared address books the sharee is set in the ACL of the address book
-	 * @param $addressBookId
-	 * @param $acl
-	 * @return array
-	 */
-	public function applyShareAcl($addressBookId, $acl) {
-		return $this->sharingBackend->applyShareAcl($addressBookId, $acl);
-	}
-
-	private function convertPrincipal($principalUri, $toV2) {
-		if ($this->principalBackend->getPrincipalPrefix() === 'principals') {
-			list(, $name) = URLUtil::splitPath($principalUri);
-			if ($toV2 === true) {
-				return "principals/users/$name";
-			}
-			return "principals/$name";
-		}
-		return $principalUri;
-	}
-}
diff --git a/apps/dav/lib/carddav/contactsmanager.php b/apps/dav/lib/carddav/contactsmanager.php
deleted file mode 100644
index 7900c6ccae0..00000000000
--- a/apps/dav/lib/carddav/contactsmanager.php
+++ /dev/null
@@ -1,65 +0,0 @@
-<?php
-/**
- * @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 OCA\DAV\CardDAV;
-
-use OCP\Contacts\IManager;
-
-class ContactsManager {
-
-	/**
-	 * ContactsManager constructor.
-	 *
-	 * @param CardDavBackend $backend
-	 */
-	public function __construct(CardDavBackend $backend) {
-		$this->backend = $backend;
-	}
-
-	/**
-	 * @param IManager $cm
-	 * @param string $userId
-	 */
-	public function setupContactsProvider(IManager $cm, $userId) {
-		$addressBooks = $this->backend->getAddressBooksForUser("principals/users/$userId");
-		$this->register($cm, $addressBooks);
-		$addressBooks = $this->backend->getAddressBooksForUser("principals/system/system");
-		$this->register($cm, $addressBooks);
-	}
-
-	/**
-	 * @param IManager $cm
-	 * @param $addressBooks
-	 */
-	private function register(IManager $cm, $addressBooks) {
-		foreach ($addressBooks as $addressBookInfo) {
-			$addressBook = new \OCA\DAV\CardDAV\AddressBook($this->backend, $addressBookInfo);
-			$cm->registerAddressBook(
-				new AddressBookImpl(
-					$addressBook,
-					$addressBookInfo,
-					$this->backend
-				)
-			);
-		}
-	}
-
-}
diff --git a/apps/dav/lib/carddav/converter.php b/apps/dav/lib/carddav/converter.php
deleted file mode 100644
index c8d9b94c267..00000000000
--- a/apps/dav/lib/carddav/converter.php
+++ /dev/null
@@ -1,171 +0,0 @@
-<?php
-/**
- * @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 OCA\DAV\CardDAV;
-
-use OCP\IImage;
-use OCP\IUser;
-use Sabre\VObject\Component\VCard;
-use Sabre\VObject\Property\Text;
-
-class Converter {
-
-	/**
-	 * @param IUser $user
-	 * @return VCard
-	 */
-	public function createCardFromUser(IUser $user) {
-
-		$uid = $user->getUID();
-		$displayName = $user->getDisplayName();
-		$displayName = empty($displayName ) ? $uid : $displayName;
-		$emailAddress = $user->getEMailAddress();
-		$cloudId = $user->getCloudId();
-		$image = $this->getAvatarImage($user);
-
-		$vCard = new VCard();
-		$vCard->add(new Text($vCard, 'UID', $uid));
-		if (!empty($displayName)) {
-			$vCard->add(new Text($vCard, 'FN', $displayName));
-			$vCard->add(new Text($vCard, 'N', $this->splitFullName($displayName)));
-		}
-		if (!empty($emailAddress)) {
-			$vCard->add(new Text($vCard, 'EMAIL', $emailAddress, ['TYPE' => 'OTHER']));
-		}
-		if (!empty($cloudId)) {
-			$vCard->add(new Text($vCard, 'CLOUD', $cloudId));
-		}
-		if ($image) {
-			$vCard->add('PHOTO', $image->data(), ['ENCODING' => 'b', 'TYPE' => $image->mimeType()]);
-		}
-		$vCard->validate();
-
-		return $vCard;
-	}
-
-	/**
-	 * @param VCard $vCard
-	 * @param IUser $user
-	 * @return bool
-	 */
-	public function updateCard(VCard $vCard, IUser $user) {
-		$uid = $user->getUID();
-		$displayName = $user->getDisplayName();
-		$displayName = empty($displayName ) ? $uid : $displayName;
-		$emailAddress = $user->getEMailAddress();
-		$cloudId = $user->getCloudId();
-		$image = $this->getAvatarImage($user);
-
-		$updated = false;
-		if($this->propertyNeedsUpdate($vCard, 'FN', $displayName)) {
-			$vCard->FN = new Text($vCard, 'FN', $displayName);
-			unset($vCard->N);
-			$vCard->add(new Text($vCard, 'N', $this->splitFullName($displayName)));
-			$updated = true;
-		}
-		if($this->propertyNeedsUpdate($vCard, 'EMAIL', $emailAddress)) {
-			$vCard->EMAIL = new Text($vCard, 'EMAIL', $emailAddress);
-			$updated = true;
-		}
-		if($this->propertyNeedsUpdate($vCard, 'CLOUD', $cloudId)) {
-			$vCard->CLOUD = new Text($vCard, 'CLOUD', $cloudId);
-			$updated = true;
-		}
-
-		if($this->propertyNeedsUpdate($vCard, 'PHOTO', $image)) {
-			$vCard->add('PHOTO', $image->data(), ['ENCODING' => 'b', 'TYPE' => $image->mimeType()]);
-			$updated = true;
-		}
-
-		if (empty($emailAddress) && !is_null($vCard->EMAIL)) {
-			unset($vCard->EMAIL);
-			$updated = true;
-		}
-		if (empty($cloudId) && !is_null($vCard->CLOUD)) {
-			unset($vCard->CLOUD);
-			$updated = true;
-		}
-		if (empty($image) && !is_null($vCard->PHOTO)) {
-			unset($vCard->PHOTO);
-			$updated = true;
-		}
-
-		return $updated;
-	}
-
-	/**
-	 * @param VCard $vCard
-	 * @param string $name
-	 * @param string|IImage $newValue
-	 * @return bool
-	 */
-	private function propertyNeedsUpdate(VCard $vCard, $name, $newValue) {
-		if (is_null($newValue)) {
-			return false;
-		}
-		$value = $vCard->__get($name);
-		if (!is_null($value)) {
-			$value = $value->getValue();
-			$newValue = $newValue instanceof IImage ? $newValue->data() : $newValue;
-
-			return $value !== $newValue;
-		}
-		return true;
-	}
-
-	/**
-	 * @param string $fullName
-	 * @return string[]
-	 */
-	public function splitFullName($fullName) {
-		// Very basic western style parsing. I'm not gonna implement
-		// https://github.com/android/platform_packages_providers_contactsprovider/blob/master/src/com/android/providers/contacts/NameSplitter.java ;)
-
-		$elements = explode(' ', $fullName);
-		$result = ['', '', '', '', ''];
-		if (count($elements) > 2) {
-			$result[0] = implode(' ', array_slice($elements, count($elements)-1));
-			$result[1] = $elements[0];
-			$result[2] = implode(' ', array_slice($elements, 1, count($elements)-2));
-		} elseif (count($elements) === 2) {
-			$result[0] = $elements[1];
-			$result[1] = $elements[0];
-		} else {
-			$result[0] = $elements[0];
-		}
-
-		return $result;
-	}
-
-	/**
-	 * @param IUser $user
-	 * @return null|IImage
-	 */
-	private function getAvatarImage(IUser $user) {
-		try {
-			$image = $user->getAvatarImage(-1);
-			return $image;
-		} catch (\Exception $ex) {
-			return null;
-		}
-	}
-
-}
diff --git a/apps/dav/lib/carddav/plugin.php b/apps/dav/lib/carddav/plugin.php
deleted file mode 100644
index e02cc5686b8..00000000000
--- a/apps/dav/lib/carddav/plugin.php
+++ /dev/null
@@ -1,79 +0,0 @@
-<?php
-/**
- * @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 OCA\DAV\CardDAV;
-
-use OCA\DAV\CardDAV\Xml\Groups;
-use Sabre\DAV\INode;
-use Sabre\DAV\PropFind;
-use Sabre\DAV\Server;
-use Sabre\HTTP\URLUtil;
-
-class Plugin extends \Sabre\CardDAV\Plugin {
-
-	function initialize(Server $server) {
-		$server->on('propFind', [$this, 'propFind']);
-		parent::initialize($server);
-	}
-
-	/**
-	 * Returns the addressbook home for a given principal
-	 *
-	 * @param string $principal
-	 * @return string
-	 */
-	protected function getAddressbookHomeForPrincipal($principal) {
-
-		if (strrpos($principal, 'principals/users', -strlen($principal)) !== false) {
-			list(, $principalId) = URLUtil::splitPath($principal);
-			return self::ADDRESSBOOK_ROOT . '/users/' . $principalId;
-		}
-		if (strrpos($principal, 'principals/groups', -strlen($principal)) !== false) {
-			list(, $principalId) = URLUtil::splitPath($principal);
-			return self::ADDRESSBOOK_ROOT . '/groups/' . $principalId;
-		}
-		if (strrpos($principal, 'principals/system', -strlen($principal)) !== false) {
-			list(, $principalId) = URLUtil::splitPath($principal);
-			return self::ADDRESSBOOK_ROOT . '/system/' . $principalId;
-		}
-
-		throw new \LogicException('This is not supposed to happen');
-	}
-
-	/**
-	 * Adds all CardDAV-specific properties
-	 *
-	 * @param PropFind $propFind
-	 * @param INode $node
-	 * @return void
-	 */
-	function propFind(PropFind $propFind, INode $node) {
-
-		$ns = '{http://owncloud.org/ns}';
-
-		if ($node instanceof AddressBook) {
-
-			$propFind->handle($ns . 'groups', function () use ($node) {
-				return new Groups($node->getContactsGroups());
-			});
-		}
-	}
-}
diff --git a/apps/dav/lib/carddav/syncjob.php b/apps/dav/lib/carddav/syncjob.php
deleted file mode 100644
index 0554af6fbf1..00000000000
--- a/apps/dav/lib/carddav/syncjob.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-/**
- * @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 OCA\DAV\CardDAV;
-
-use OC\BackgroundJob\TimedJob;
-use OCA\Dav\AppInfo\Application;
-
-class SyncJob extends TimedJob {
-
-	public function __construct() {
-		// Run once a day
-		$this->setInterval(24 * 60 * 60);
-	}
-
-	protected function run($argument) {
-		$app = new Application();
-		/** @var SyncService $ss */
-		$ss = $app->getSyncService();
-		$ss->syncInstance();
-	}
-}
diff --git a/apps/dav/lib/carddav/syncservice.php b/apps/dav/lib/carddav/syncservice.php
deleted file mode 100644
index c4741a01772..00000000000
--- a/apps/dav/lib/carddav/syncservice.php
+++ /dev/null
@@ -1,284 +0,0 @@
-<?php
-/**
- * @author Björn Schießle <schiessle@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 OCA\DAV\CardDAV;
-
-use OCP\AppFramework\Http;
-use OCP\ILogger;
-use OCP\IUser;
-use OCP\IUserManager;
-use Sabre\DAV\Client;
-use Sabre\DAV\Xml\Response\MultiStatus;
-use Sabre\DAV\Xml\Service;
-use Sabre\HTTP\ClientHttpException;
-use Sabre\VObject\Reader;
-
-class SyncService {
-
-	/** @var CardDavBackend */
-	private $backend;
-
-	/** @var IUserManager */
-	private $userManager;
-
-	/** @var ILogger */
-	private $logger;
-
-	/** @var array */
-	private $localSystemAddressBook;
-
-	public function __construct(CardDavBackend $backend, IUserManager $userManager, ILogger $logger) {
-		$this->backend = $backend;
-		$this->userManager = $userManager;
-		$this->logger = $logger;
-	}
-
-	/**
-	 * @param string $url
-	 * @param string $userName
-	 * @param string $sharedSecret
-	 * @param string $syncToken
-	 * @param int $targetBookId
-	 * @param string $targetPrincipal
-	 * @param array $targetProperties
-	 * @return string
-	 * @throws \Exception
-	 */
-	public function syncRemoteAddressBook($url, $userName, $sharedSecret, $syncToken, $targetBookId, $targetPrincipal, $targetProperties) {
-		// 1. create addressbook
-		$book = $this->ensureSystemAddressBookExists($targetPrincipal, $targetBookId, $targetProperties);
-		$addressBookId = $book['id'];
-
-		// 2. query changes
-		try {
-			$response = $this->requestSyncReport($url, $userName, $sharedSecret, $syncToken);
-		} catch (ClientHttpException $ex) {
-			if ($ex->getCode() === Http::STATUS_UNAUTHORIZED) {
-				// remote server revoked access to the address book, remove it
-				$this->backend->deleteAddressBook($addressBookId);
-				$this->logger->info('Authorization failed, remove address book: ' . $url, ['app' => 'dav']);
-				throw $ex;
-			}
-		}
-
-		// 3. apply changes
-		// TODO: use multi-get for download
-		foreach ($response['response'] as $resource => $status) {
-			$cardUri = basename($resource);
-			if (isset($status[200])) {
-				$vCard = $this->download($url, $sharedSecret, $resource);
-				$existingCard = $this->backend->getCard($addressBookId, $cardUri);
-				if ($existingCard === false) {
-					$this->backend->createCard($addressBookId, $cardUri, $vCard['body']);
-				} else {
-					$this->backend->updateCard($addressBookId, $cardUri, $vCard['body']);
-				}
-			} else {
-				$this->backend->deleteCard($addressBookId, $cardUri);
-			}
-		}
-
-		return $response['token'];
-	}
-
-	/**
-	 * @param string $principal
-	 * @param string $id
-	 * @param array $properties
-	 * @return array|null
-	 * @throws \Sabre\DAV\Exception\BadRequest
-	 */
-	public function ensureSystemAddressBookExists($principal, $id, $properties) {
-		$book = $this->backend->getAddressBooksByUri($principal, $id);
-		if (!is_null($book)) {
-			return $book;
-		}
-		$this->backend->createAddressBook($principal, $id, $properties);
-
-		return $this->backend->getAddressBooksByUri($principal, $id);
-	}
-
-	/**
-	 * @param string $url
-	 * @param string $userName
-	 * @param string $sharedSecret
-	 * @param string $syncToken
-	 * @return array
-	 */
-	protected function requestSyncReport($url, $userName, $sharedSecret, $syncToken) {
-		$settings = [
-			'baseUri' => $url . '/',
-			'userName' => $userName,
-			'password' => $sharedSecret,
-		];
-		$client = new Client($settings);
-		$client->setThrowExceptions(true);
-
-		$addressBookUrl = "remote.php/dav/addressbooks/system/system/system";
-		$body = $this->buildSyncCollectionRequestBody($syncToken);
-
-		$response = $client->request('REPORT', $addressBookUrl, $body, [
-			'Content-Type' => 'application/xml'
-		]);
-
-		$result = $this->parseMultiStatus($response['body']);
-
-		return $result;
-	}
-
-	/**
-	 * @param string $url
-	 * @param string $sharedSecret
-	 * @param string $resourcePath
-	 * @return array
-	 */
-	protected function download($url, $sharedSecret, $resourcePath) {
-		$settings = [
-			'baseUri' => $url,
-			'userName' => 'system',
-			'password' => $sharedSecret,
-		];
-		$client = new Client($settings);
-		$client->setThrowExceptions(true);
-
-		$response = $client->request('GET', $resourcePath);
-		return $response;
-	}
-
-	/**
-	 * @param string|null $syncToken
-	 * @return string
-	 */
-	private function buildSyncCollectionRequestBody($syncToken) {
-
-		$dom = new \DOMDocument('1.0', 'UTF-8');
-		$dom->formatOutput = true;
-		$root = $dom->createElementNS('DAV:', 'd:sync-collection');
-		$sync = $dom->createElement('d:sync-token', $syncToken);
-		$prop = $dom->createElement('d:prop');
-		$cont = $dom->createElement('d:getcontenttype');
-		$etag = $dom->createElement('d:getetag');
-
-		$prop->appendChild($cont);
-		$prop->appendChild($etag);
-		$root->appendChild($sync);
-		$root->appendChild($prop);
-		$dom->appendChild($root);
-		$body = $dom->saveXML();
-
-		return $body;
-	}
-
-	/**
-	 * @param string $body
-	 * @return array
-	 * @throws \Sabre\Xml\ParseException
-	 */
-	private function parseMultiStatus($body) {
-		$xml = new Service();
-
-		/** @var MultiStatus $multiStatus */
-		$multiStatus = $xml->expect('{DAV:}multistatus', $body);
-
-		$result = [];
-		foreach ($multiStatus->getResponses() as $response) {
-			$result[$response->getHref()] = $response->getResponseProperties();
-		}
-
-		return ['response' => $result, 'token' => $multiStatus->getSyncToken()];
-	}
-
-	/**
-	 * @param IUser $user
-	 */
-	public function updateUser($user) {
-		$systemAddressBook = $this->getLocalSystemAddressBook();
-		$addressBookId = $systemAddressBook['id'];
-		$converter = new Converter();
-		$name = $user->getBackendClassName();
-		$userId = $user->getUID();
-
-		$cardId = "$name:$userId.vcf";
-		$card = $this->backend->getCard($addressBookId, $cardId);
-		if ($card === false) {
-			$vCard = $converter->createCardFromUser($user);
-			$this->backend->createCard($addressBookId, $cardId, $vCard->serialize());
-		} else {
-			$vCard = Reader::read($card['carddata']);
-			if ($converter->updateCard($vCard, $user)) {
-				$this->backend->updateCard($addressBookId, $cardId, $vCard->serialize());
-			}
-		}
-	}
-
-	/**
-	 * @param IUser|string $userOrCardId
-	 */
-	public function deleteUser($userOrCardId) {
-		$systemAddressBook = $this->getLocalSystemAddressBook();
-		if ($userOrCardId instanceof IUser){
-			$name = $userOrCardId->getBackendClassName();
-			$userId = $userOrCardId->getUID();
-
-			$userOrCardId = "$name:$userId.vcf";
-		}
-		$this->backend->deleteCard($systemAddressBook['id'], $userOrCardId);
-	}
-
-	/**
-	 * @return array|null
-	 */
-	public function getLocalSystemAddressBook() {
-		if (is_null($this->localSystemAddressBook)) {
-			$systemPrincipal = "principals/system/system";
-			$this->localSystemAddressBook = $this->ensureSystemAddressBookExists($systemPrincipal, 'system', [
-				'{' . Plugin::NS_CARDDAV . '}addressbook-description' => 'System addressbook which holds all users of this instance'
-			]);
-		}
-
-		return $this->localSystemAddressBook;
-	}
-
-	public function syncInstance(\Closure $progressCallback = null) {
-		$systemAddressBook = $this->getLocalSystemAddressBook();
-		$this->userManager->callForAllUsers(function($user) use ($systemAddressBook, $progressCallback) {
-			$this->updateUser($user);
-			if (!is_null($progressCallback)) {
-				$progressCallback();
-			}
-		});
-
-		// remove no longer existing
-		$allCards = $this->backend->getCards($systemAddressBook['id']);
-		foreach($allCards as $card) {
-			$vCard = Reader::read($card['carddata']);
-			$uid = $vCard->UID->getValue();
-			// load backend and see if user exists
-			if (!$this->userManager->userExists($uid)) {
-				$this->deleteUser($card['uri']);
-			}
-		}
-	}
-
-
-}
diff --git a/apps/dav/lib/carddav/useraddressbooks.php b/apps/dav/lib/carddav/useraddressbooks.php
deleted file mode 100644
index 734e3829e69..00000000000
--- a/apps/dav/lib/carddav/useraddressbooks.php
+++ /dev/null
@@ -1,67 +0,0 @@
-<?php
-/**
- * @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 OCA\DAV\CardDAV;
-
-class UserAddressBooks extends \Sabre\CardDAV\AddressBookHome {
-
-	/**
-	 * Returns a list of addressbooks
-	 *
-	 * @return array
-	 */
-	function getChildren() {
-
-		$addressBooks = $this->carddavBackend->getAddressBooksForUser($this->principalUri);
-		$objects = [];
-		foreach($addressBooks as $addressBook) {
-			$objects[] = new AddressBook($this->carddavBackend, $addressBook);
-		}
-		return $objects;
-
-	}
-
-	/**
-	 * Returns a list of ACE's for this node.
-	 *
-	 * Each ACE has the following properties:
-	 *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
-	 *     currently the only supported privileges
-	 *   * 'principal', a url to the principal who owns the node
-	 *   * 'protected' (optional), indicating that this ACE is not allowed to
-	 *      be updated.
-	 *
-	 * @return array
-	 */
-	function getACL() {
-
-		$acl = parent::getACL();
-		if ($this->principalUri === 'principals/system/system') {
-			$acl[] = [
-					'privilege' => '{DAV:}read',
-					'principal' => '{DAV:}authenticated',
-					'protected' => true,
-			];
-		}
-
-		return $acl;
-	}
-
-}
diff --git a/apps/dav/lib/carddav/xml/groups.php b/apps/dav/lib/carddav/xml/groups.php
deleted file mode 100644
index b39615db033..00000000000
--- a/apps/dav/lib/carddav/xml/groups.php
+++ /dev/null
@@ -1,45 +0,0 @@
-<?php
-/**
- * @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 OCA\DAV\CardDAV\Xml;
-
-use Sabre\Xml\XmlSerializable;
-use Sabre\Xml\Element;
-use Sabre\Xml\Writer;
-
-class Groups implements XmlSerializable {
-	const NS_OWNCLOUD = 'http://owncloud.org/ns';
-
-	/** @var string[] of TYPE:CHECKSUM */
-	private $groups;
-
-	/**
-	 * @param string $groups
-	 */
-	public function __construct($groups) {
-		$this->groups = $groups;
-	}
-
-	function xmlSerialize(Writer $writer) {
-		foreach ($this->groups as $group) {
-			$writer->writeElement('{' . self::NS_OWNCLOUD . '}group', $group);
-		}
-	}
-}