79 lines
2.3 KiB
PHP
79 lines
2.3 KiB
PHP
<?php
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/**
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* Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
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* This file is licensed under the Affero General Public License version 3 or
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* later.
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* See the COPYING-README file.
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*/
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namespace OC\Files\Storage;
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use OCP\Files\Mount\IMountPoint;
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use OCP\Files\Storage\IStorageFactory;
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class StorageFactory implements IStorageFactory {
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/**
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* @var callable[] $storageWrappers
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*/
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private $storageWrappers = array();
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/**
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* allow modifier storage behaviour by adding wrappers around storages
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*
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* $callback should be a function of type (string $mountPoint, Storage $storage) => Storage
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*
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* @param string $wrapperName name of the wrapper
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* @param callable $callback callback
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* @param \OCP\Files\Mount\IMountPoint[] $existingMounts existing mount points to apply the wrapper to
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* @return bool true if the wrapper was added, false if there was already a wrapper with this
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* name registered
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*/
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public function addStorageWrapper($wrapperName, $callback, $existingMounts = []) {
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if (isset($this->storageWrappers[$wrapperName])) {
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return false;
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}
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// apply to existing mounts before registering it to prevent applying it double in MountPoint::createStorage
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foreach ($existingMounts as $mount) {
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$mount->wrapStorage($callback);
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}
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$this->storageWrappers[$wrapperName] = $callback;
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return true;
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}
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/**
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* Remove a storage wrapper by name.
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* Note: internal method only to be used for cleanup
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*
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* @param string $wrapperName name of the wrapper
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* @internal
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*/
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public function removeStorageWrapper($wrapperName) {
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unset($this->storageWrappers[$wrapperName]);
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}
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/**
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* Create an instance of a storage and apply the registered storage wrappers
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*
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* @param \OCP\Files\Mount\IMountPoint $mountPoint
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* @param string $class
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* @param array $arguments
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* @return \OCP\Files\Storage
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*/
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public function getInstance(IMountPoint $mountPoint, $class, $arguments) {
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return $this->wrap($mountPoint, new $class($arguments));
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}
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/**
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* @param \OCP\Files\Mount\IMountPoint $mountPoint
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* @param \OCP\Files\Storage $storage
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* @return \OCP\Files\Storage
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*/
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public function wrap(IMountPoint $mountPoint, $storage) {
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foreach ($this->storageWrappers as $wrapper) {
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$storage = $wrapper($mountPoint->getMountPoint(), $storage, $mountPoint);
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}
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return $storage;
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}
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}
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