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basic UI for iroh-share backup transfer
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,239 @@ | ||
| import Foundation | ||
| import UIKit | ||
| import DcCore | ||
| import SDWebImageSVGKitPlugin | ||
|
|
||
| protocol QrBackupViewControllerDelegate: NSObject { | ||
| func onBackupFinished(sender: QrBackupViewController) | ||
| func onBackupStarted() | ||
| func isPreviousBackupRunning() -> Bool | ||
| func onDismissed() | ||
| } | ||
|
|
||
| class QrBackupViewController: UIViewController { | ||
|
|
||
| private let dcContext: DcContext | ||
| private let dcAccounts: DcAccounts | ||
| private var dcBackupSender: DcBackupSender? | ||
| // this delegate is not weak on purpose: we manually remove the referece once the ViewController has | ||
| // been dismissed if no backup is in progress OR if the ongoing backup finished and the | ||
| // ViewController has been dismissed in the past | ||
| public var delegate: QrBackupViewControllerDelegate? | ||
|
|
||
| private lazy var qrContentView: UIImageView = { | ||
| let view = UIImageView() | ||
| view.contentMode = .scaleAspectFit | ||
| view.translatesAutoresizingMaskIntoConstraints = false | ||
| view.accessibilityHint = String.localized("scan_to_transfer") | ||
| return view | ||
| }() | ||
|
|
||
| private lazy var progressContainer: UIView = { | ||
| let view = UIView() | ||
| view.translatesAutoresizingMaskIntoConstraints = false | ||
| view.layer.cornerRadius = 20 | ||
| view.clipsToBounds = true | ||
| view.layer.borderColor = DcColors.grey50.cgColor | ||
| view.layer.borderWidth = 1 | ||
| view.backgroundColor = DcColors.defaultInverseColor.withAlphaComponent(0.5) | ||
| return view | ||
| }() | ||
|
|
||
| private lazy var progress: UIActivityIndicatorView = { | ||
| let progress = UIActivityIndicatorView(style: .white) | ||
| progress.translatesAutoresizingMaskIntoConstraints = false | ||
| return progress | ||
| }() | ||
|
|
||
| private lazy var blurView: UIVisualEffectView = { | ||
| let blurEffect = UIBlurEffect(style: .light) | ||
| let view = UIVisualEffectView(effect: blurEffect) | ||
| view.translatesAutoresizingMaskIntoConstraints = false | ||
| return view | ||
| }() | ||
|
|
||
| private var isBackupRunning = false | ||
| private var progressObserver: NSObjectProtocol? | ||
|
|
||
| init(dcAccounts: DcAccounts) { | ||
| self.dcAccounts = dcAccounts | ||
| self.dcContext = dcAccounts.getSelected() | ||
| super.init(nibName: nil, bundle: nil) | ||
| } | ||
|
|
||
| required init?(coder _: NSCoder) { | ||
| fatalError("init(coder:) has not been implemented") | ||
| } | ||
|
|
||
| // MARK: - lifecycle | ||
| override func viewDidLoad() { | ||
| super.viewDidLoad() | ||
| logger.debug(">>>>>>>>>>>>>>>>> viewDidLoad") | ||
| title = String.localized("setup_new_device") | ||
| setupSubviews() | ||
| view.backgroundColor = DcColors.defaultBackgroundColor | ||
| if let delegate = delegate, !delegate.isPreviousBackupRunning() { | ||
| logger.debug(">>>> viewDidLoad no previous Backup Running starting Backup") | ||
| startBackup() | ||
| } | ||
| } | ||
|
|
||
| override func viewDidDisappear(_ animated: Bool) { | ||
| logger.debug(">>>> onViewDidDisappear") | ||
| delegate?.onDismissed() | ||
| if isBackupRunning { | ||
| logger.debug(">>>> stop ongoingProcess") | ||
| self.dcContext.stopOngoingProcess() | ||
| } else { | ||
| delegate = nil | ||
| dcBackupSender = nil | ||
| logger.debug(">>>> nil delegate") | ||
| } | ||
| } | ||
|
|
||
| public func startBackup() { | ||
| let documents = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true) | ||
| if !documents.isEmpty { | ||
| self.isBackupRunning = true | ||
| logger.debug(">>>> startBackup isBackupRunning: \(isBackupRunning)") | ||
| DispatchQueue.global(qos: .userInitiated).async { [weak self] in | ||
| guard let self = self else { return } | ||
| self.delegate?.onBackupStarted() | ||
| self.dcAccounts.stopIo() | ||
| self.dcBackupSender = self.dcContext.send_backup(directory: documents[0], passphrase: nil) | ||
| self.dcAccounts.startIo() | ||
| self.delegate?.onBackupFinished(sender: self) | ||
| DispatchQueue.main.async { | ||
| self.isBackupRunning = false | ||
| logger.debug(">>>> startBackup finishing - isBackupRunning: \(self.isBackupRunning)") | ||
| logger.debug(">>>> startBackup has parent: \(self.parent != nil)") | ||
| if self.parent == nil { | ||
| logger.debug(">>>> nil delegate") | ||
| self.delegate = nil | ||
| self.dcBackupSender = nil | ||
| } else { | ||
| let image = self.getQrImage(svg: self.dcBackupSender?.qr_code(context: self.dcContext)) | ||
| self.qrContentView.image = image | ||
| self.progress.stopAnimating() | ||
| self.progressContainer.isHidden = true | ||
| } | ||
| } | ||
| } | ||
| } else { | ||
| logger.error("document directory not found") | ||
| self.dcBackupSender = nil | ||
| } | ||
| } | ||
|
|
||
| // MARK: - setup | ||
| private func setupSubviews() { | ||
| view.addSubview(qrContentView) | ||
| view.addSubview(progressContainer) | ||
| progressContainer.addSubview(blurView) | ||
| progressContainer.addSubview(progress) | ||
| let qrDefaultWidth = qrContentView.widthAnchor.constraint(equalTo: view.safeAreaLayoutGuide.widthAnchor, multiplier: 0.75) | ||
| qrDefaultWidth.priority = UILayoutPriority(500) | ||
| qrDefaultWidth.isActive = true | ||
| let qrMinWidth = qrContentView.widthAnchor.constraint(lessThanOrEqualToConstant: 260) | ||
| qrMinWidth.priority = UILayoutPriority(999) | ||
| qrMinWidth.isActive = true | ||
| view.addConstraints([ | ||
| qrContentView.heightAnchor.constraint(equalTo: view.safeAreaLayoutGuide.heightAnchor, multiplier: 1.05), | ||
| qrContentView.centerYAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerYAnchor), | ||
| qrContentView.centerXAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerXAnchor), | ||
| progressContainer.centerYAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerYAnchor), | ||
| progressContainer.centerXAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerXAnchor), | ||
| progressContainer.constraintHeightTo(100), | ||
| progressContainer.constraintWidthTo(100), | ||
| progress.constraintCenterXTo(progressContainer), | ||
| progress.constraintCenterYTo(progressContainer) | ||
| ]) | ||
| blurView.fillSuperview() | ||
| progressContainer.isHidden = false | ||
| progress.startAnimating() | ||
| } | ||
|
|
||
| private func getQrImage(svg: String?) -> UIImage? { | ||
| if let svg = svg { | ||
| let svgData = svg.data(using: .utf8) | ||
| return SDImageSVGKCoder.shared.decodedImage(with: svgData, options: [:]) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| } | ||
|
|
||
|
|
||
| /// Does a best effort attempt to trigger the local network privacy alert. | ||
| /// | ||
| /// It works by sending a UDP datagram to the discard service (port 9) of every | ||
| /// IP address associated with a broadcast-capable interface. This should | ||
| /// trigger the local network privacy alert, assuming the alert hasn’t already | ||
| /// been displayed for this app. | ||
| /// | ||
| /// This code takes a ‘best effort’. It handles errors by ignoring them. As | ||
| /// such, there’s guarantee that it’ll actually trigger the alert. | ||
| /// | ||
| /// - note: iOS devices don’t actually run the discard service. I’m using it | ||
| /// here because I need a port to send the UDP datagram to and port 9 is | ||
| /// always going to be safe (either the discard service is running, in which | ||
| /// case it will discard the datagram, or it’s not, in which case the TCP/IP | ||
| /// stack will discard it). | ||
| /// | ||
| /// There should be a proper API for this (r. 69157424). | ||
| /// | ||
| /// For more background on this, see [Triggering the Local Network Privacy Alert](https://developer.apple.com/forums/thread/663768). | ||
| /// [via https://developer.apple.com/forums/thread/663768 ] | ||
| func triggerLocalNetworkPrivacyAlert() { | ||
| let sock4 = socket(AF_INET, SOCK_DGRAM, 0) | ||
| guard sock4 >= 0 else { return } | ||
| defer { close(sock4) } | ||
| let sock6 = socket(AF_INET6, SOCK_DGRAM, 0) | ||
| guard sock6 >= 0 else { return } | ||
| defer { close(sock6) } | ||
|
|
||
| let addresses = addressesOfDiscardServiceOnBroadcastCapableInterfaces() | ||
| var message = [UInt8]("!".utf8) | ||
| for address in addresses { | ||
| address.withUnsafeBytes { buf in | ||
| let sa = buf.baseAddress!.assumingMemoryBound(to: sockaddr.self) | ||
| let saLen = socklen_t(buf.count) | ||
| let sock = sa.pointee.sa_family == AF_INET ? sock4 : sock6 | ||
| _ = sendto(sock, &message, message.count, MSG_DONTWAIT, sa, saLen) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /// Returns the addresses of the discard service (port 9) on every | ||
| /// broadcast-capable interface. | ||
| /// | ||
| /// Each array entry is contains either a `sockaddr_in` or `sockaddr_in6`. | ||
| private func addressesOfDiscardServiceOnBroadcastCapableInterfaces() -> [Data] { | ||
| var addrList: UnsafeMutablePointer<ifaddrs>? = nil | ||
| let err = getifaddrs(&addrList) | ||
| guard err == 0, let start = addrList else { return [] } | ||
| defer { freeifaddrs(start) } | ||
| return sequence(first: start, next: { $0.pointee.ifa_next }) | ||
| .compactMap { i -> Data? in | ||
| guard | ||
| (i.pointee.ifa_flags & UInt32(bitPattern: IFF_BROADCAST)) != 0, | ||
| let sa = i.pointee.ifa_addr | ||
| else { return nil } | ||
| var result = Data(UnsafeRawBufferPointer(start: sa, count: Int(sa.pointee.sa_len))) | ||
| switch CInt(sa.pointee.sa_family) { | ||
| case AF_INET: | ||
| result.withUnsafeMutableBytes { buf in | ||
| let sin = buf.baseAddress!.assumingMemoryBound(to: sockaddr_in.self) | ||
| sin.pointee.sin_port = UInt16(9).bigEndian | ||
| } | ||
| case AF_INET6: | ||
| result.withUnsafeMutableBytes { buf in | ||
| let sin6 = buf.baseAddress!.assumingMemoryBound(to: sockaddr_in6.self) | ||
| sin6.pointee.sin6_port = UInt16(9).bigEndian | ||
| } | ||
| default: | ||
| return nil | ||
| } | ||
| return result | ||
| } | ||
| } |
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