nextcloud / server

				throw new \Exception($message_t);

			}

			// verify that the user has share permission

			if (!\OC\Files\Filesystem::isSharable($path) || \OCP\Util::isSharingDisabledForUser()) {

				$message = 'You are not allowed to share %s';

				$message_t = $l->t('You are not allowed to share %s', [$path]);

				\OCP\Util::writeLog('OCP\Share', sprintf($message, $path), \OCP\Util::DEBUG);

				throw new \Exception($message_t);

			}

		}

		//verify that we don't share a folder which already contains a share mount point

			$class = self::$backendTypes[$itemType]['class'];

			if (class_exists($class)) {

				self::$backends[$itemType] = new $class;

				if (!(self::$backends[$itemType] instanceof \OCP\Share_Backend)) {

					$message = 'Sharing backend %s must implement the interface OCP\Share_Backend';

					$message_t = $l->t('Sharing backend %s must implement the interface OCP\Share_Backend', array($class));

					\OCP\Util::writeLog('OCP\Share', sprintf($message, $class), \OCP\Util::ERROR);

					throw new \Exception($message_t);

				}

				return self::$backends[$itemType];

			} else {

				$message = 'Sharing backend %s not found';