owncloud / core

	 */

	public static function registerBackend($itemType, $class, $collectionOf = null, $supportedFileExtensions = null) {

		if (self::isEnabled()) {

			if ($itemType === 'file' || $itemType === 'folder') {

				throw new \InvalidArgumentException('Item type "' . $itemType . '" not supported by old share API any more');

			}

			if (!isset(self::$backendTypes[$itemType])) {

				self::$backendTypes[$itemType] = [

					'class' => $class,

	 * @return array Return list of items with item_target, permissions and expiration

	 */

	public static function getItemSharedWithUser($itemType, $itemSource, $user, $owner = null, $shareType = null) {

		if ($itemType === 'file' || $itemType === 'folder') {

			throw new \InvalidArgumentException('Item type "' . $itemType . '" not supported by old share API any more');

		}

		$shares = [];

		$where = 'WHERE';

	 * Unsharing from self is not allowed for items inside collections

	 */

	public static function unshareFromSelf($itemType, $itemOrigin, $originIsSource = false) {

		if ($itemType === 'file' || $itemType === 'folder') {

			throw new \InvalidArgumentException('Item type "' . $itemType . '" not supported by old share API any more');

		}

		$originType = ($originIsSource) ? 'source' : 'target';

		$uid = \OCP\User::getUser();

		if (!self::isEnabled()) {

			return [];

		}

		if ($itemType === 'file' || $itemType === 'folder') {

			throw new \InvalidArgumentException('Item type "' . $itemType . '" not supported by old share API any more');

		}

		$backend = self::getBackend($itemType);

		$collectionTypes = false;

		// Get filesystem root to add it to the file target and remove from the

	 * @return array of grouped items

	 */

	protected static function groupItems($items, $itemType) {

		if ($itemType === 'file' || $itemType === 'folder') {

			throw new \InvalidArgumentException('Item type "' . $itemType . '" not supported by old share API any more');

		}

		$fileSharing = false;

		$result = [];

	 */

	private static function put($itemType, $itemSource, $shareType, $shareWith, $uidOwner,

								$permissions, $parentFolder = null, $token = null, $itemSourceName = null, \DateTime $expirationDate = null) {

		if ($itemType === 'file' || $itemType === 'folder') {

			throw new \InvalidArgumentException('Item type "' . $itemType . '" not supported by old share API any more');

		}

		$queriesToExecute = [];

		$suggestedItemTarget = null;

	 * @param null|\DateTime $expirationDate

	 */

	private static function checkReshare($itemType, $itemSource, $shareType, $shareWith, $uidOwner, $permissions, $itemSourceName, $expirationDate) {

		if ($itemType === 'file' || $itemType === 'folder') {

			throw new \InvalidArgumentException('Item type "' . $itemType . '" not supported by old share API any more');

		}

		$backend = self::getBackend($itemType);

		$l = \OC::$server->getL10N('lib');