mirror of https://github.com/nextcloud/desktop
65 lines
2.7 KiB
Swift
65 lines
2.7 KiB
Swift
/*
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* Copyright (C) 2022 by Claudio Cambra <claudio.cambra@nextcloud.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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import FileProvider
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class FileProviderEnumerator: NSObject, NSFileProviderEnumerator {
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private let enumeratedItemIdentifier: NSFileProviderItemIdentifier
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private let anchor = NSFileProviderSyncAnchor("an anchor".data(using: .utf8)!)
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init(enumeratedItemIdentifier: NSFileProviderItemIdentifier) {
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self.enumeratedItemIdentifier = enumeratedItemIdentifier
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super.init()
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}
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func invalidate() {
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// TODO: perform invalidation of server connection if necessary
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}
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func enumerateItems(for observer: NSFileProviderEnumerationObserver, startingAt page: NSFileProviderPage) {
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/* TODO:
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- inspect the page to determine whether this is an initial or a follow-up request
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If this is an enumerator for a directory, the root container or all directories:
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- perform a server request to fetch directory contents
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If this is an enumerator for the active set:
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- perform a server request to update your local database
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- fetch the active set from your local database
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- inform the observer about the items returned by the server (possibly multiple times)
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- inform the observer that you are finished with this page
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*/
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observer.didEnumerate([FileProviderItem(identifier: NSFileProviderItemIdentifier("a file"))])
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observer.finishEnumerating(upTo: nil)
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}
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func enumerateChanges(for observer: NSFileProviderChangeObserver, from anchor: NSFileProviderSyncAnchor) {
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/* TODO:
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- query the server for updates since the passed-in sync anchor
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If this is an enumerator for the active set:
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- note the changes in your local database
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- inform the observer about item deletions and updates (modifications + insertions)
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- inform the observer when you have finished enumerating up to a subsequent sync anchor
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*/
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observer.finishEnumeratingChanges(upTo: anchor, moreComing: false)
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}
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func currentSyncAnchor(completionHandler: @escaping (NSFileProviderSyncAnchor?) -> Void) {
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completionHandler(anchor)
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}
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}
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