// // FileProviderExtension.swift // Files // // Created by Marino Faggiana on 26/03/18. // Copyright © 2018 Marino Faggiana. All rights reserved. // // Author Marino Faggiana // // This program is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // 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 General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program. If not, see . // import FileProvider import NCCommunication import Alamofire /* ----------------------------------------------------------------------------------------------------------------------------------------------- STRUCT item ----------------------------------------------------------------------------------------------------------------------------------------------- itemIdentifier = NSFileProviderItemIdentifier.rootContainer.rawValue --> root parentItemIdentifier = NSFileProviderItemIdentifier.rootContainer.rawValue --> root ↓ itemIdentifier = metadata.ocId (ex. 00ABC1) --> func getItemIdentifier(metadata: tableMetadata) -> NSFileProviderItemIdentifier parentItemIdentifier = NSFileProviderItemIdentifier.rootContainer.rawValue --> func getParentItemIdentifier(metadata: tableMetadata) -> NSFileProviderItemIdentifier? ↓ itemIdentifier = metadata.ocId (ex. 00CCC) --> func getItemIdentifier(metadata: tableMetadata) -> NSFileProviderItemIdentifier parentItemIdentifier = parent itemIdentifier (00ABC1) --> func getParentItemIdentifier(metadata: tableMetadata) -> NSFileProviderItemIdentifier? ↓ itemIdentifier = metadata.ocId (ex. 000DD) --> func getItemIdentifier(metadata: tableMetadata) -> NSFileProviderItemIdentifier parentItemIdentifier = parent itemIdentifier (00CCC) --> func getParentItemIdentifier(metadata: tableMetadata) -> NSFileProviderItemIdentifier? -------------------------------------------------------------------------------------------------------------------------------------------- */ class FileProviderExtension: NSFileProviderExtension { var outstandingSessionTasks = [URL: URLSessionTask]() var outstandingOcIdTemp = [String:String]() override init() { super.init() // Create directory File Provider Storage CCUtility.getDirectoryProviderStorage() } // MARK: - Enumeration override func enumerator(for containerItemIdentifier: NSFileProviderItemIdentifier) throws -> NSFileProviderEnumerator { var maybeEnumerator: NSFileProviderEnumerator? = nil if Int(k_fileProvider_domain) == 1 { if (containerItemIdentifier != NSFileProviderItemIdentifier.workingSet) { if containerItemIdentifier == NSFileProviderItemIdentifier.rootContainer && self.domain?.identifier.rawValue == nil { throw NSError(domain: NSFileProviderErrorDomain, code: NSFileProviderError.notAuthenticated.rawValue, userInfo:[:]) } else if self.domain?.identifier.rawValue != nil { if fileProviderData.sharedInstance.setupActiveAccount(domain: self.domain?.identifier.rawValue, providerExtension: self) == false { throw NSError(domain: NSFileProviderErrorDomain, code: NSFileProviderError.notAuthenticated.rawValue, userInfo:[:]) } } else { if fileProviderData.sharedInstance.setupActiveAccount(itemIdentifier: containerItemIdentifier, providerExtension: self) == false { throw NSError(domain: NSFileProviderErrorDomain, code: NSFileProviderError.notAuthenticated.rawValue, userInfo:[:]) } } } } else { if (containerItemIdentifier != NSFileProviderItemIdentifier.workingSet) { if fileProviderData.sharedInstance.setupActiveAccount(domain: nil, providerExtension: self) == false { throw NSError(domain: NSFileProviderErrorDomain, code: NSFileProviderError.notAuthenticated.rawValue, userInfo:[:]) } } } if (containerItemIdentifier == NSFileProviderItemIdentifier.rootContainer) { maybeEnumerator = FileProviderEnumerator(enumeratedItemIdentifier: containerItemIdentifier) } else if (containerItemIdentifier == NSFileProviderItemIdentifier.workingSet) { maybeEnumerator = FileProviderEnumerator(enumeratedItemIdentifier: containerItemIdentifier) } else { // determine if the item is a directory or a file // - for a directory, instantiate an enumerator of its subitems // - for a file, instantiate an enumerator that observes changes to the file let item = try self.item(for: containerItemIdentifier) if item.typeIdentifier == kUTTypeFolder as String { maybeEnumerator = FileProviderEnumerator(enumeratedItemIdentifier: containerItemIdentifier) } else { maybeEnumerator = FileProviderEnumerator(enumeratedItemIdentifier: containerItemIdentifier) } } guard let enumerator = maybeEnumerator else { throw NSError(domain: NSCocoaErrorDomain, code: NSFeatureUnsupportedError, userInfo:[:]) } return enumerator } // MARK: - Item override func item(for identifier: NSFileProviderItemIdentifier) throws -> NSFileProviderItem { if identifier == .rootContainer { let metadata = tableMetadata() metadata.account = fileProviderData.sharedInstance.account metadata.directory = true metadata.ocId = NSFileProviderItemIdentifier.rootContainer.rawValue metadata.fileName = "root" metadata.fileNameView = "root" metadata.serverUrl = fileProviderData.sharedInstance.homeServerUrl metadata.typeFile = k_metadataTypeFile_directory return FileProviderItem(metadata: metadata, parentItemIdentifier: NSFileProviderItemIdentifier(NSFileProviderItemIdentifier.rootContainer.rawValue)) } else { guard let metadata = fileProviderUtility.sharedInstance.getTableMetadataFromItemIdentifier(identifier) else { throw NSFileProviderError(.noSuchItem) } guard let parentItemIdentifier = fileProviderUtility.sharedInstance.getParentItemIdentifier(metadata: metadata, homeServerUrl: fileProviderData.sharedInstance.homeServerUrl) else { throw NSFileProviderError(.noSuchItem) } let item = FileProviderItem(metadata: metadata, parentItemIdentifier: parentItemIdentifier) return item } } override func urlForItem(withPersistentIdentifier identifier: NSFileProviderItemIdentifier) -> URL? { // resolve the given identifier to a file on disk guard let item = try? item(for: identifier) else { return nil } // in this implementation, all paths are structured as // let manager = NSFileProviderManager.default var url = manager.documentStorageURL.appendingPathComponent(identifier.rawValue, isDirectory: true) if item.typeIdentifier == (kUTTypeFolder as String) { url = url.appendingPathComponent(item.filename, isDirectory:true) } else { url = url.appendingPathComponent(item.filename, isDirectory:false) } return url } override func persistentIdentifierForItem(at url: URL) -> NSFileProviderItemIdentifier? { // resolve the given URL to a persistent identifier using a database let pathComponents = url.pathComponents // exploit the fact that the path structure has been defined as // // above assert(pathComponents.count > 2) let itemIdentifier = NSFileProviderItemIdentifier(pathComponents[pathComponents.count - 2]) return itemIdentifier } override func providePlaceholder(at url: URL, completionHandler: @escaping (Error?) -> Void) { guard let identifier = persistentIdentifierForItem(at: url) else { completionHandler(NSFileProviderError(.noSuchItem)) return } do { let fileProviderItem = try item(for: identifier) let placeholderURL = NSFileProviderManager.placeholderURL(for: url) try NSFileProviderManager.writePlaceholder(at: placeholderURL,withMetadata: fileProviderItem) completionHandler(nil) } catch { completionHandler(error) } } override func startProvidingItem(at url: URL, completionHandler: @escaping ((_ error: Error?) -> Void)) { let pathComponents = url.pathComponents let identifier = NSFileProviderItemIdentifier(pathComponents[pathComponents.count - 2]) var downloadRequest: DownloadRequest? var task: URLSessionTask? if let _ = outstandingSessionTasks[url] { completionHandler(nil) return } guard var metadata = fileProviderUtility.sharedInstance.getTableMetadataFromItemIdentifier(identifier) else { completionHandler(NSFileProviderError(.noSuchItem)) return } let tableLocalFile = NCManageDatabase.sharedInstance.getTableLocalFile(predicate: NSPredicate(format: "ocId == %@", metadata.ocId)) if tableLocalFile != nil && CCUtility.fileProviderStorageExists(metadata.ocId, fileNameView: metadata.fileNameView) && tableLocalFile?.etag == metadata.etag { completionHandler(nil) return } let serverUrlFileName = metadata.serverUrl + "/" + metadata.fileName let fileNameLocalPath = CCUtility.getDirectoryProviderStorageOcId(metadata.ocId, fileNameView: metadata.fileName)! NCCommunication.shared.download(serverUrlFileName: serverUrlFileName, fileNameLocalPath: fileNameLocalPath, requestHandler: { (request) in metadata.status = Int(k_metadataStatusDownloading) if let result = NCManageDatabase.sharedInstance.addMetadata(metadata) { metadata = result } downloadRequest = request self.outstandingSessionTasks[url] = task }, progressHandler: { (progress) in if task == nil && downloadRequest?.task != nil { task = downloadRequest?.task self.outstandingSessionTasks[url] = task NSFileProviderManager.default.register(task!, forItemWithIdentifier: NSFileProviderItemIdentifier(identifier.rawValue)) { (error) in } } }) { (account, etag, date, length, error, errorCode, errorDescription) in self.outstandingSessionTasks.removeValue(forKey: url) if errorCode == 0 { metadata.status = Int(k_metadataStatusNormal) metadata.date = date ?? NSDate() metadata.etag = etag ?? "" NCManageDatabase.sharedInstance.addLocalFile(metadata: metadata) if let result = NCManageDatabase.sharedInstance.addMetadata(metadata) { metadata = result } completionHandler(nil) } else { metadata.status = Int(k_metadataStatusDownloadError) metadata.sessionError = errorDescription NCManageDatabase.sharedInstance.addMetadata(metadata) completionHandler(NSFileProviderError(.noSuchItem)) } } } override func itemChanged(at url: URL) { let pathComponents = url.pathComponents assert(pathComponents.count > 2) let itemIdentifier = NSFileProviderItemIdentifier(pathComponents[pathComponents.count - 2]) let fileName = pathComponents[pathComponents.count - 1] var ocId = itemIdentifier.rawValue // Temp ocId ? if outstandingOcIdTemp[ocId] != nil && outstandingOcIdTemp[ocId] != ocId { ocId = outstandingOcIdTemp[ocId]! let atPath = CCUtility.getDirectoryProviderStorageOcId(itemIdentifier.rawValue, fileNameView: fileName) let toPath = CCUtility.getDirectoryProviderStorageOcId(ocId, fileNameView: fileName) CCUtility.copyFile(atPath: atPath, toPath: toPath) } guard let metadata = NCManageDatabase.sharedInstance.getMetadata(predicate: NSPredicate(format: "ocId == %@", ocId)) else { return } let serverUrlFileName = metadata.serverUrl + "/" + fileName let fileNameLocalPath = url.path if let task = NCCommunicationBackground.shared.upload(serverUrlFileName: serverUrlFileName, fileNameLocalPath: fileNameLocalPath, dateCreationFile: nil, dateModificationFile: nil, description: metadata.ocId, session: NCCommunicationBackground.shared.sessionManagerTransferExtension) { NSFileProviderManager.default.register(task, forItemWithIdentifier: NSFileProviderItemIdentifier(metadata.fileId)) { (error) in } } } override func stopProvidingItem(at url: URL) { let fileHasLocalChanges = false if !fileHasLocalChanges { // remove the existing file to free up space do { _ = try fileProviderUtility.sharedInstance.fileManager.removeItem(at: url) } catch let error { print("error: \(error)") } // write out a placeholder to facilitate future property lookups self.providePlaceholder(at: url, completionHandler: { error in // handle any error, do any necessary cleanup }) } // Download task if let downloadTask = outstandingSessionTasks[url] { downloadTask.cancel() outstandingSessionTasks.removeValue(forKey: url) } } override func importDocument(at fileURL: URL, toParentItemIdentifier parentItemIdentifier: NSFileProviderItemIdentifier, completionHandler: @escaping (NSFileProviderItem?, Error?) -> Void) { DispatchQueue.main.async { autoreleasepool { var size = 0 as Double var error: NSError? guard let tableDirectory = fileProviderUtility.sharedInstance.getTableDirectoryFromParentItemIdentifier(parentItemIdentifier, account: fileProviderData.sharedInstance.account, homeServerUrl: fileProviderData.sharedInstance.homeServerUrl) else { completionHandler(nil, NSFileProviderError(.noSuchItem)) return } _ = fileURL.startAccessingSecurityScopedResource() // typefile directory ? (NOT PERMITTED) do { let attributes = try fileProviderUtility.sharedInstance.fileManager.attributesOfItem(atPath: fileURL.path) size = attributes[FileAttributeKey.size] as! Double let typeFile = attributes[FileAttributeKey.type] as! FileAttributeType if typeFile == FileAttributeType.typeDirectory { completionHandler(nil, NSFileProviderError(.noSuchItem)) return } } catch { completionHandler(nil, NSFileProviderError(.noSuchItem)) return } let fileName = NCUtility.sharedInstance.createFileName(fileURL.lastPathComponent, serverUrl: tableDirectory.serverUrl, account: fileProviderData.sharedInstance.account) let ocIdTemp = NSUUID().uuidString.lowercased() NSFileCoordinator().coordinate(readingItemAt: fileURL, options: .withoutChanges, error: &error) { (url) in _ = fileProviderUtility.sharedInstance.copyFile(url.path, toPath: CCUtility.getDirectoryProviderStorageOcId(ocIdTemp, fileNameView: fileName)) } fileURL.stopAccessingSecurityScopedResource() let metadata = NCManageDatabase.sharedInstance.createMetadata(account: fileProviderData.sharedInstance.account, fileName: fileName, ocId: ocIdTemp, serverUrl: tableDirectory.serverUrl, url: "", contentType: "") metadata.session = NCCommunicationCommon.shared.sessionIdentifierExtension metadata.size = size metadata.status = Int(k_metadataStatusInUpload) guard let metadataForUpload = NCManageDatabase.sharedInstance.addMetadata(metadata) else { completionHandler(nil, NSFileProviderError(.noSuchItem)) return } let serverUrlFileName = tableDirectory.serverUrl + "/" + fileName let fileNameLocalPath = CCUtility.getDirectoryProviderStorageOcId(ocIdTemp, fileNameView: fileName)! if let task = NCCommunicationBackground.shared.upload(serverUrlFileName: serverUrlFileName, fileNameLocalPath: fileNameLocalPath, dateCreationFile: nil, dateModificationFile: nil, description: ocIdTemp, session: NCCommunicationBackground.shared.sessionManagerTransferExtension) { self.outstandingSessionTasks[URL(fileURLWithPath: fileNameLocalPath)] = task as URLSessionTask NSFileProviderManager.default.register(task, forItemWithIdentifier: NSFileProviderItemIdentifier(ocIdTemp)) { (error) in } } let item = FileProviderItem(metadata: metadataForUpload, parentItemIdentifier: parentItemIdentifier) completionHandler(item, nil) } } } }