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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;
class Mount {
/**
* @var \OC\Files\Storage\Storage $storage
*/
private $storage = null;
private $class;
private $storageId;
private $arguments = array();
private $mountPoint;
/**
* @var callable[] $storageWrappers
*/
private $storageWrappers = array();
/**
* @param string|\OC\Files\Storage\Storage $storage
* @param string $mountpoint
* @param array $arguments (optional)
*/
public function __construct($storage, $mountpoint, $arguments = null) {
if (is_null($arguments)) {
$arguments = array();
}
$mountpoint = $this->formatPath($mountpoint);
if ($storage instanceof \OC\Files\Storage\Storage) {
$this->class = get_class($storage);
$this->storage = $storage;
} else {
// Update old classes to new namespace
if (strpos($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 $this->loadStorage($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;
}
}
/**
* allow modifier storage behaviour by adding wrappers around storages
*
* $callback should be a function of type (string $mountPoint, Storage $storage) => Storage
*
* @param callable $callback
*/
public function addStorageWrapper($callback) {
$this->storageWrappers[] = $callback;
}
private function loadStorage($class, $arguments) {
$storage = new $class($arguments);
foreach ($this->storageWrappers as $wrapper) {
$storage = $wrapper($this->mountPoint, $storage);
}
return $storage;
}
/**
* @return \OC\Files\Storage\Storage
*/
public function getStorage() {
if (is_null($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;
}
}
|
