122 lines
3.8 KiB
PHP
122 lines
3.8 KiB
PHP
<?php
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/**
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* @author Lukas Reschke <lukas@owncloud.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <icewind@owncloud.com>
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* @author Vincent Petry <pvince81@owncloud.com>
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*
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* @copyright Copyright (c) 2015, ownCloud, Inc.
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OCA\Files_Sharing\External;
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use OC\ForbiddenException;
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use OCP\Files\NotFoundException;
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use OCP\Files\StorageInvalidException;
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use OCP\Files\StorageNotAvailableException;
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class Scanner extends \OC\Files\Cache\Scanner {
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/** @var \OCA\Files_Sharing\External\Storage */
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protected $storage;
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/** {@inheritDoc} */
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public function scan($path, $recursive = self::SCAN_RECURSIVE, $reuse = -1, $lock = true) {
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$this->scanAll();
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}
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/**
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* Scan a single file and store it in the cache.
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* If an exception happened while accessing the external storage,
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* the storage will be checked for availability and removed
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* if it is not available any more.
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*
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* @param string $file file to scan
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* @param int $reuseExisting
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* @param int $parentId
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* @param array | null $cacheData existing data in the cache for the file to be scanned
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* @param bool $lock set to false to disable getting an additional read lock during scanning
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* @return array an array of metadata of the scanned file
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*/
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public function scanFile($file, $reuseExisting = 0, $parentId = -1, $cacheData = null, $lock = true) {
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try {
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return parent::scanFile($file, $reuseExisting);
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} catch (ForbiddenException $e) {
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$this->storage->checkStorageAvailability();
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} catch (NotFoundException $e) {
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// if the storage isn't found, the call to
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// checkStorageAvailable() will verify it and remove it
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// if appropriate
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$this->storage->checkStorageAvailability();
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} catch (StorageInvalidException $e) {
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$this->storage->checkStorageAvailability();
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} catch (StorageNotAvailableException $e) {
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$this->storage->checkStorageAvailability();
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}
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}
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/**
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* Checks the remote share for changes.
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* If changes are available, scan them and update
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* the cache.
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* @throws NotFoundException
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* @throws StorageInvalidException
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* @throws \Exception
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*/
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public function scanAll() {
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try {
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$data = $this->storage->getShareInfo();
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} catch (\Exception $e) {
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$this->storage->checkStorageAvailability();
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throw new \Exception(
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'Error while scanning remote share: "' .
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$this->storage->getRemote() . '" ' .
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$e->getMessage()
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);
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}
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if ($data['status'] === 'success') {
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$this->addResult($data['data'], '');
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} else {
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throw new \Exception(
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'Error while scanning remote share: "' .
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$this->storage->getRemote() . '"'
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);
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}
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}
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/**
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* @param array $data
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* @param string $path
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*/
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private function addResult($data, $path) {
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$id = $this->cache->put($path, $data);
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if (isset($data['children'])) {
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$children = [];
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foreach ($data['children'] as $child) {
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$children[$child['name']] = true;
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$this->addResult($child, ltrim($path . '/' . $child['name'], '/'));
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}
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$existingCache = $this->cache->getFolderContentsById($id);
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foreach ($existingCache as $existingChild) {
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// if an existing child is not in the new data, remove it
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if (!isset($children[$existingChild['name']])) {
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$this->cache->remove(ltrim($path . '/' . $existingChild['name'], '/'));
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}
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}
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}
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}
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}
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