1 files changed, 251 insertions, 0 deletions
diff --git a/lib/private/Files/Mount/MountPoint.php b/lib/private/Files/Mount/MountPoint.php
new file mode 100644
index 00000000000..7b9294fc1e0
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+++ b/lib/private/Files/Mount/MountPoint.php
@@ -0,0 +1,251 @@
+<?php
+/**
+ * @author Björn Schießle <schiessle@owncloud.com>
+ * @author Jörn Friedrich Dreyer <jfd@butonic.de>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Robin Appelman <icewind@owncloud.com>
+ * @author Robin McCorkell <robin@mccorkell.me.uk>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ * @author Vincent Petry <pvince81@owncloud.com>
+ *
+ * @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 OC\Files\Mount;
+
+use \OC\Files\Filesystem;
+use OC\Files\Storage\StorageFactory;
+use OC\Files\Storage\Storage;
+use OCP\Files\Mount\IMountPoint;
+
+class MountPoint implements IMountPoint {
+	/**
+	 * @var \OC\Files\Storage\Storage $storage
+	 */
+	protected $storage = null;
+	protected $class;
+	protected $storageId;
+
+	/**
+	 * Configuration options for the storage backend
+	 *
+	 * @var array
+	 */
+	protected $arguments = array();
+	protected $mountPoint;
+
+	/**
+	 * Mount specific options
+	 *
+	 * @var array
+	 */
+	protected $mountOptions = array();
+
+	/**
+	 * @var \OC\Files\Storage\StorageFactory $loader
+	 */
+	private $loader;
+
+	/**
+	 * Specified whether the storage is invalid after failing to
+	 * instantiate it.
+	 *
+	 * @var bool
+	 */
+	private $invalidStorage = false;
+
+	/**
+	 * @param string|\OC\Files\Storage\Storage $storage
+	 * @param string $mountpoint
+	 * @param array $arguments (optional) configuration for the storage backend
+	 * @param \OCP\Files\Storage\IStorageFactory $loader
+	 * @param array $mountOptions mount specific options
+	 */
+	public function __construct($storage, $mountpoint, $arguments = null, $loader = null, $mountOptions = null) {
+		if (is_null($arguments)) {
+			$arguments = array();
+		}
+		if (is_null($loader)) {
+			$this->loader = new StorageFactory();
+		} else {
+			$this->loader = $loader;
+		}
+
+		if (!is_null($mountOptions)) {
+			$this->mountOptions = $mountOptions;
+		}
+
+		$mountpoint = $this->formatPath($mountpoint);
+		$this->mountPoint = $mountpoint;
+		if ($storage instanceof Storage) {
+			$this->class = get_class($storage);
+			$this->storage = $this->loader->wrap($this, $storage);
+		} else {
+			// Update old classes to new namespace
+			if (strpos($storage, 'OC_Filestorage_') !== false) {
+				$storage = '\OC\Files\Storage\\' . substr($storage, 15);
+			}
+			$this->class = $storage;
+			$this->arguments = $arguments;
+		}
+	}
+
+	/**
+	 * get complete path to the mount point, relative to data/
+	 *
+	 * @return string
+	 */
+	public function getMountPoint() {
+		return $this->mountPoint;
+	}
+
+	/**
+	 * Sets the mount point path, relative to data/
+	 *
+	 * @param string $mountPoint new mount point
+	 */
+	public function setMountPoint($mountPoint) {
+		$this->mountPoint = $this->formatPath($mountPoint);
+	}
+
+	/**
+	 * create the storage that is mounted
+	 *
+	 * @return \OC\Files\Storage\Storage
+	 */
+	private function createStorage() {
+		if ($this->invalidStorage) {
+			return null;
+		}
+
+		if (class_exists($this->class)) {
+			try {
+				return $this->loader->getInstance($this, $this->class, $this->arguments);
+			} catch (\Exception $exception) {
+				$this->invalidStorage = true;
+				if ($this->mountPoint === '/') {
+					// the root storage could not be initialized, show the user!
+					throw new \Exception('The root storage could not be initialized. Please contact your local administrator.', $exception->getCode(), $exception);
+				} else {
+					\OCP\Util::writeLog('core', $exception->getMessage(), \OCP\Util::ERROR);
+				}
+				return null;
+			}
+		} else {
+			\OCP\Util::writeLog('core', 'storage backend ' . $this->class . ' not found', \OCP\Util::ERROR);
+			$this->invalidStorage = true;
+			return null;
+		}
+	}
+
+	/**
+	 * @return \OC\Files\Storage\Storage
+	 */
+	public function getStorage() {
+		if (is_null($this->storage)) {
+			$this->storage = $this->createStorage();
+		}
+		return $this->storage;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getStorageId() {
+		if (!$this->storageId) {
+			if (is_null($this->storage)) {
+				$storage = $this->createStorage(); //FIXME: start using exceptions
+				if (is_null($storage)) {
+					return null;
+				}
+
+				$this->storage = $storage;
+			}
+			$this->storageId = $this->storage->getId();
+			if (strlen($this->storageId) > 64) {
+				$this->storageId = md5($this->storageId);
+			}
+		}
+		return $this->storageId;
+	}
+
+	/**
+	 * @param string $path
+	 * @return string
+	 */
+	public function getInternalPath($path) {
+		if ($this->mountPoint === $path or $this->mountPoint . '/' === $path) {
+			$internalPath = '';
+		} else {
+			$internalPath = substr($path, strlen($this->mountPoint));
+		}
+		// substr returns false instead of an empty string, we always want a string
+		return (string)$internalPath;
+	}
+
+	/**
+	 * @param string $path
+	 * @return string
+	 */
+	private function formatPath($path) {
+		$path = Filesystem::normalizePath($path);
+		if (strlen($path) > 1) {
+			$path .= '/';
+		}
+		return $path;
+	}
+
+	/**
+	 * @param callable $wrapper
+	 */
+	public function wrapStorage($wrapper) {
+		$storage = $this->getStorage();
+		// storage can be null if it couldn't be initialized
+		if ($storage != null) {
+			$this->storage = $wrapper($this->mountPoint, $storage, $this);
+		}
+	}
+
+	/**
+	 * Get a mount option
+	 *
+	 * @param string $name Name of the mount option to get
+	 * @param mixed $default Default value for the mount option
+	 * @return mixed
+	 */
+	public function getOption($name, $default) {
+		return isset($this->mountOptions[$name]) ? $this->mountOptions[$name] : $default;
+	}
+
+	/**
+	 * Get all options for the mount
+	 *
+	 * @return array
+	 */
+	public function getOptions() {
+		return $this->mountOptions;
+	}
+
+	/**
+	 * Get the file id of the root of the storage
+	 *
+	 * @return int
+	 */
+	public function getStorageRootId() {
+		return (int)$this->getStorage()->getCache()->getId('');
+	}
+}