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<?php
/**
* Copyright (c) 2014 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 OCA\Files_Sharing\External;
use OC\ForbiddenException;
use OCP\Files\NotFoundException;
use OCP\Files\StorageInvalidException;
use OCP\Files\StorageNotAvailableException;
class Scanner extends \OC\Files\Cache\Scanner {
/**
* @var \OCA\Files_Sharing\External\Storage
*/
protected $storage;
public function scan($path, $recursive = self::SCAN_RECURSIVE, $reuse = -1) {
$this->scanAll();
}
/**
* Scan a single file and store it in the cache.
* If an exception happened while accessing the external storage,
* the storage will be checked for availability and removed
* if it is not available any more.
*
* @param string $file file to scan
* @param int $reuseExisting
* @return array an array of metadata of the scanned file
*/
public function scanFile($file, $reuseExisting = 0) {
try {
return parent::scanFile($file, $reuseExisting);
} catch (ForbiddenException $e) {
$this->storage->checkStorageAvailability();
} catch (NotFoundException $e) {
// if the storage isn't found, the call to
// checkStorageAvailable() will verify it and remove it
// if appropriate
$this->storage->checkStorageAvailability();
} catch (StorageInvalidException $e) {
$this->storage->checkStorageAvailability();
} catch (StorageNotAvailableException $e) {
$this->storage->checkStorageAvailability();
}
}
/**
* Checks the remote share for changes.
* If changes are available, scan them and update
* the cache.
*/
public function scanAll() {
try {
$data = $this->storage->getShareInfo();
} catch (\Exception $e) {
$this->storage->checkStorageAvailability();
throw new \Exception(
'Error while scanning remote share: "' .
$this->storage->getRemote() . '" ' .
$e->getMessage()
);
}
if ($data['status'] === 'success') {
$this->addResult($data['data'], '');
} else {
throw new \Exception(
'Error while scanning remote share: "' .
$this->storage->getRemote() . '"'
);
}
}
private function addResult($data, $path) {
$id = $this->cache->put($path, $data);
if (isset($data['children'])) {
$children = array();
foreach ($data['children'] as $child) {
$children[$child['name']] = true;
$this->addResult($child, ltrim($path . '/' . $child['name'], '/'));
}
$existingCache = $this->cache->getFolderContentsById($id);
foreach ($existingCache as $existingChild) {
// if an existing child is not in the new data, remove it
if (!isset($children[$existingChild['name']])) {
$this->cache->remove(ltrim($path . '/' . $existingChild['name'], '/'));
}
}
}
}
}
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