268 lines
8 KiB
PHP
268 lines
8 KiB
PHP
<?php
|
|
/**
|
|
* @copyright Copyright (c) 2016, ownCloud, Inc.
|
|
*
|
|
* @author Robin Appelman <robin@icewind.nl>
|
|
*
|
|
* @license AGPL-3.0
|
|
*
|
|
* This code is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License, version 3,
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License, version 3,
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>
|
|
*
|
|
*/
|
|
|
|
namespace OCP\Files\Cache;
|
|
use OCP\Files\Search\ISearchQuery;
|
|
|
|
/**
|
|
* Metadata cache for a storage
|
|
*
|
|
* The cache stores the metadata for all files and folders in a storage and is kept up to date trough the following mechanisms:
|
|
*
|
|
* - Scanner: scans the storage and updates the cache where needed
|
|
* - Watcher: checks for changes made to the filesystem outside of the ownCloud instance and rescans files and folder when a change is detected
|
|
* - Updater: listens to changes made to the filesystem inside of the ownCloud instance and updates the cache where needed
|
|
* - ChangePropagator: updates the mtime and etags of parent folders whenever a change to the cache is made to the cache by the updater
|
|
*
|
|
* @since 9.0.0
|
|
*/
|
|
interface ICache {
|
|
const NOT_FOUND = 0;
|
|
const PARTIAL = 1; //only partial data available, file not cached in the database
|
|
const SHALLOW = 2; //folder in cache, but not all child files are completely scanned
|
|
const COMPLETE = 3;
|
|
|
|
/**
|
|
* Get the numeric storage id for this cache's storage
|
|
*
|
|
* @return int
|
|
* @since 9.0.0
|
|
*/
|
|
public function getNumericStorageId();
|
|
|
|
/**
|
|
* get the stored metadata of a file or folder
|
|
*
|
|
* @param string | int $file either the path of a file or folder or the file id for a file or folder
|
|
* @return ICacheEntry|false the cache entry or false if the file is not found in the cache
|
|
* @since 9.0.0
|
|
*/
|
|
public function get($file);
|
|
|
|
/**
|
|
* get the metadata of all files stored in $folder
|
|
*
|
|
* Only returns files one level deep, no recursion
|
|
*
|
|
* @param string $folder
|
|
* @return ICacheEntry[]
|
|
* @since 9.0.0
|
|
*/
|
|
public function getFolderContents($folder);
|
|
|
|
/**
|
|
* get the metadata of all files stored in $folder
|
|
*
|
|
* Only returns files one level deep, no recursion
|
|
*
|
|
* @param int $fileId the file id of the folder
|
|
* @return ICacheEntry[]
|
|
* @since 9.0.0
|
|
*/
|
|
public function getFolderContentsById($fileId);
|
|
|
|
/**
|
|
* store meta data for a file or folder
|
|
* This will automatically call either insert or update depending on if the file exists
|
|
*
|
|
* @param string $file
|
|
* @param array $data
|
|
*
|
|
* @return int file id
|
|
* @throws \RuntimeException
|
|
* @since 9.0.0
|
|
*/
|
|
public function put($file, array $data);
|
|
|
|
/**
|
|
* insert meta data for a new file or folder
|
|
*
|
|
* @param string $file
|
|
* @param array $data
|
|
*
|
|
* @return int file id
|
|
* @throws \RuntimeException
|
|
* @since 9.0.0
|
|
*/
|
|
public function insert($file, array $data);
|
|
|
|
/**
|
|
* update the metadata of an existing file or folder in the cache
|
|
*
|
|
* @param int $id the fileid of the existing file or folder
|
|
* @param array $data [$key => $value] the metadata to update, only the fields provided in the array will be updated, non-provided values will remain unchanged
|
|
* @since 9.0.0
|
|
*/
|
|
public function update($id, array $data);
|
|
|
|
/**
|
|
* get the file id for a file
|
|
*
|
|
* A file id is a numeric id for a file or folder that's unique within an owncloud instance which stays the same for the lifetime of a file
|
|
*
|
|
* File ids are easiest way for apps to store references to a file since unlike paths they are not affected by renames or sharing
|
|
*
|
|
* @param string $file
|
|
* @return int
|
|
* @since 9.0.0
|
|
*/
|
|
public function getId($file);
|
|
|
|
/**
|
|
* get the id of the parent folder of a file
|
|
*
|
|
* @param string $file
|
|
* @return int
|
|
* @since 9.0.0
|
|
*/
|
|
public function getParentId($file);
|
|
|
|
/**
|
|
* check if a file is available in the cache
|
|
*
|
|
* @param string $file
|
|
* @return bool
|
|
* @since 9.0.0
|
|
*/
|
|
public function inCache($file);
|
|
|
|
/**
|
|
* remove a file or folder from the cache
|
|
*
|
|
* when removing a folder from the cache all files and folders inside the folder will be removed as well
|
|
*
|
|
* @param string $file
|
|
* @since 9.0.0
|
|
*/
|
|
public function remove($file);
|
|
|
|
/**
|
|
* Move a file or folder in the cache
|
|
*
|
|
* @param string $source
|
|
* @param string $target
|
|
* @since 9.0.0
|
|
*/
|
|
public function move($source, $target);
|
|
|
|
/**
|
|
* Move a file or folder in the cache
|
|
*
|
|
* Note that this should make sure the entries are removed from the source cache
|
|
*
|
|
* @param \OCP\Files\Cache\ICache $sourceCache
|
|
* @param string $sourcePath
|
|
* @param string $targetPath
|
|
* @throws \OC\DatabaseException
|
|
* @since 9.0.0
|
|
*/
|
|
public function moveFromCache(ICache $sourceCache, $sourcePath, $targetPath);
|
|
|
|
/**
|
|
* Get the scan status of a file
|
|
*
|
|
* - ICache::NOT_FOUND: File is not in the cache
|
|
* - ICache::PARTIAL: File is not stored in the cache but some incomplete data is known
|
|
* - ICache::SHALLOW: The folder and it's direct children are in the cache but not all sub folders are fully scanned
|
|
* - ICache::COMPLETE: The file or folder, with all it's children) are fully scanned
|
|
*
|
|
* @param string $file
|
|
*
|
|
* @return int ICache::NOT_FOUND, ICache::PARTIAL, ICache::SHALLOW or ICache::COMPLETE
|
|
* @since 9.0.0
|
|
*/
|
|
public function getStatus($file);
|
|
|
|
/**
|
|
* search for files matching $pattern, files are matched if their filename matches the search pattern
|
|
*
|
|
* @param string $pattern the search pattern using SQL search syntax (e.g. '%searchstring%')
|
|
* @return ICacheEntry[] an array of cache entries where the name matches the search pattern
|
|
* @since 9.0.0
|
|
* @deprecated 9.0.0 due to lack of pagination, not all backends might implement this
|
|
*/
|
|
public function search($pattern);
|
|
|
|
/**
|
|
* search for files by mimetype
|
|
*
|
|
* @param string $mimetype either a full mimetype to search ('text/plain') or only the first part of a mimetype ('image')
|
|
* where it will search for all mimetypes in the group ('image/*')
|
|
* @return ICacheEntry[] an array of cache entries where the mimetype matches the search
|
|
* @since 9.0.0
|
|
* @deprecated 9.0.0 due to lack of pagination, not all backends might implement this
|
|
*/
|
|
public function searchByMime($mimetype);
|
|
|
|
/**
|
|
* Search for files with a flexible query
|
|
*
|
|
* @param ISearchQuery $query
|
|
* @return ICacheEntry[]
|
|
* @throw \InvalidArgumentException if the cache is unable to perform the query
|
|
* @since 12.0.0
|
|
*/
|
|
public function searchQuery(ISearchQuery $query);
|
|
|
|
/**
|
|
* Search for files by tag of a given users.
|
|
*
|
|
* Note that every user can tag files differently.
|
|
*
|
|
* @param string|int $tag name or tag id
|
|
* @param string $userId owner of the tags
|
|
* @return ICacheEntry[] file data
|
|
* @since 9.0.0
|
|
* @deprecated 9.0.0 due to lack of pagination, not all backends might implement this
|
|
*/
|
|
public function searchByTag($tag, $userId);
|
|
|
|
/**
|
|
* find a folder in the cache which has not been fully scanned
|
|
*
|
|
* If multiple incomplete folders are in the cache, the one with the highest id will be returned,
|
|
* use the one with the highest id gives the best result with the background scanner, since that is most
|
|
* likely the folder where we stopped scanning previously
|
|
*
|
|
* @return string|bool the path of the folder or false when no folder matched
|
|
* @since 9.0.0
|
|
*/
|
|
public function getIncomplete();
|
|
|
|
/**
|
|
* get the path of a file on this storage by it's file id
|
|
*
|
|
* @param int $id the file id of the file or folder to search
|
|
* @return string|null the path of the file (relative to the storage) or null if a file with the given id does not exists within this cache
|
|
* @since 9.0.0
|
|
*/
|
|
public function getPathById($id);
|
|
|
|
/**
|
|
* normalize the given path for usage in the cache
|
|
*
|
|
* @param string $path
|
|
* @return string
|
|
* @since 9.0.0
|
|
*/
|
|
public function normalize($path);
|
|
}
|