1 files changed, 148 insertions, 0 deletions
diff --git a/lib/private/files/mount/mount.php b/lib/private/files/mount/mount.php
new file mode 100644
index 00000000000..0ce2f5975c7
--- /dev/null
+++ b/lib/private/files/mount/mount.php
@@ -0,0 +1,148 @@
+<?php
+/**
+ * Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OC\Files\Mount;
+
+use \OC\Files\Filesystem;
+use OC\Files\Storage\Loader;
+use OC\Files\Storage\Storage;
+
+class Mount {
+	/**
+	 * @var \OC\Files\Storage\Storage $storage
+	 */
+	private $storage = null;
+	private $class;
+	private $storageId;
+	private $arguments = array();
+	private $mountPoint;
+
+	/**
+	 * @var \OC\Files\Storage\Loader $loader
+	 */
+	private $loader;
+
+	/**
+	 * @param string | \OC\Files\Storage\Storage $storage
+	 * @param string $mountpoint
+	 * @param array $arguments (optional)\
+	 * @param \OC\Files\Storage\Loader $loader
+	 */
+	public function __construct($storage, $mountpoint, $arguments = null, $loader = null) {
+		if (is_null($arguments)) {
+			$arguments = array();
+		}
+		if (is_null($loader)) {
+			$this->loader = new Loader();
+		} else {
+			$this->loader = $loader;
+		}
+
+		$mountpoint = $this->formatPath($mountpoint);
+		if ($storage instanceof Storage) {
+			$this->class = get_class($storage);
+			$this->storage = $this->loader->wrap($mountpoint, $storage);
+		} else {
+			// Update old classes to new namespace
+			if (strpos($storage, 'OC_Filestorage_') !== false) {
+				$storage = '\OC\Files\Storage\\' . substr($storage, 15);
+			}
+			$this->class = $storage;
+			$this->arguments = $arguments;
+		}
+		$this->mountPoint = $mountpoint;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function getMountPoint() {
+		return $this->mountPoint;
+	}
+
+	/**
+	 * create the storage that is mounted
+	 *
+	 * @return \OC\Files\Storage\Storage
+	 */
+	private function createStorage() {
+		if (class_exists($this->class)) {
+			try {
+				return $this->loader->load($this->mountPoint, $this->class, $this->arguments);
+			} catch (\Exception $exception) {
+				\OC_Log::write('core', $exception->getMessage(), \OC_Log::ERROR);
+				return null;
+			}
+		} else {
+			\OC_Log::write('core', 'storage backend ' . $this->class . ' not found', \OC_Log::ERROR);
+			return null;
+		}
+	}
+
+	/**
+	 * @return \OC\Files\Storage\Storage
+	 */
+	public function getStorage() {
+		if (is_null($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));
+		}
+		return $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) {
+		$this->storage = $wrapper($this->mountPoint, $this->storage);
+	}
+}