owncloud / core

		$propPatch->handle($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');

			'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.