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<?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\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);
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;
}
/**
* get complete path to the mount point, relative to data/
*
* @return string
*/
public function getMountPoint() {
return $this->mountPoint;
}
/**
* @param string $mountPoint new mount point
*/
public function setMountPoint($mountPoint) {
$this->mountPoint = $mountPoint;
}
/**
* create the storage that is mounted
*
* @return \OC\Files\Storage\Storage
*/
private function createStorage() {
if ($this->invalidStorage) {
return null;
}
if (class_exists($this->class)) {
try {
return $this->loader->getInstance($this->mountPoint, $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 {
\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);
$this->invalidStorage = true;
return null;
}
}
/**
* @return \OC\Files\Storage\Storage
*/
public function getStorage() {
if (is_null($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);
}
}
/**
* 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;
}
}
|
