diff options
Diffstat (limited to 'WireGuard/WireGuard/UI/iOS/EditTunnel/TunnelEditTableViewController.swift')
| -rw-r--r-- | WireGuard/WireGuard/UI/iOS/EditTunnel/TunnelEditTableViewController.swift | 488 |
1 files changed, 488 insertions, 0 deletions
diff --git a/WireGuard/WireGuard/UI/iOS/EditTunnel/TunnelEditTableViewController.swift b/WireGuard/WireGuard/UI/iOS/EditTunnel/TunnelEditTableViewController.swift new file mode 100644 index 0000000..8d055d2 --- /dev/null +++ b/WireGuard/WireGuard/UI/iOS/EditTunnel/TunnelEditTableViewController.swift @@ -0,0 +1,488 @@ +// SPDX-License-Identifier: MIT +// Copyright © 2018 WireGuard LLC. All Rights Reserved. + +import UIKit + +protocol TunnelEditTableViewControllerDelegate: class { + func tunnelSaved(tunnel: TunnelContainer) + func tunnelEditingCancelled() +} + +// MARK: TunnelEditTableViewController + +class TunnelEditTableViewController: UITableViewController { + + private enum Section { + case interface + case peer(_ peer: TunnelViewModel.PeerData) + case addPeer + case onDemand + } + + weak var delegate: TunnelEditTableViewControllerDelegate? + + let interfaceFieldsBySection: [[TunnelViewModel.InterfaceField]] = [ + [.name], + [.privateKey, .publicKey, .generateKeyPair], + [.addresses, .listenPort, .mtu, .dns] + ] + + let peerFields: [TunnelViewModel.PeerField] = [ + .publicKey, .preSharedKey, .endpoint, + .allowedIPs, .excludePrivateIPs, .persistentKeepAlive, + .deletePeer + ] + + let activateOnDemandOptions: [ActivateOnDemandOption] = [ + .useOnDemandOverWiFiOrCellular, + .useOnDemandOverWiFiOnly, + .useOnDemandOverCellularOnly + ] + + let tunnelsManager: TunnelsManager + let tunnel: TunnelContainer? + let tunnelViewModel: TunnelViewModel + var activateOnDemandSetting: ActivateOnDemandSetting + private var sections = [Section]() + + init(tunnelsManager: TunnelsManager, tunnel: TunnelContainer) { + // Use this initializer to edit an existing tunnel. + self.tunnelsManager = tunnelsManager + self.tunnel = tunnel + tunnelViewModel = TunnelViewModel(tunnelConfiguration: tunnel.tunnelConfiguration()) + activateOnDemandSetting = tunnel.activateOnDemandSetting() + super.init(style: .grouped) + loadSections() + } + + init(tunnelsManager: TunnelsManager, tunnelConfiguration: TunnelConfiguration?) { + // Use this initializer to create a new tunnel. + // If tunnelConfiguration is passed, data will be prepopulated from that configuration. + self.tunnelsManager = tunnelsManager + tunnel = nil + tunnelViewModel = TunnelViewModel(tunnelConfiguration: tunnelConfiguration) + activateOnDemandSetting = ActivateOnDemandSetting.defaultSetting + super.init(style: .grouped) + loadSections() + } + + required init?(coder aDecoder: NSCoder) { + fatalError("init(coder:) has not been implemented") + } + + override func viewDidLoad() { + super.viewDidLoad() + self.title = tunnel == nil ? "New configuration" : "Edit configuration" + self.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .save, target: self, action: #selector(saveTapped)) + self.navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(cancelTapped)) + + self.tableView.estimatedRowHeight = 44 + self.tableView.rowHeight = UITableView.automaticDimension + + self.tableView.register(TunnelEditKeyValueCell.self) + self.tableView.register(TunnelEditReadOnlyKeyValueCell.self) + self.tableView.register(TunnelEditButtonCell.self) + self.tableView.register(TunnelEditSwitchCell.self) + self.tableView.register(TunnelEditSelectionListCell.self) + } + + private func loadSections() { + sections.removeAll() + interfaceFieldsBySection.forEach { _ in sections.append(.interface) } + tunnelViewModel.peersData.forEach { sections.append(.peer($0)) } + sections.append(.addPeer) + sections.append(.onDemand) + } + + @objc func saveTapped() { + self.tableView.endEditing(false) + let tunnelSaveResult = tunnelViewModel.save() + switch tunnelSaveResult { + case .error(let errorMessage): + let erroringConfiguration = (tunnelViewModel.interfaceData.validatedConfiguration == nil) ? "Interface" : "Peer" + ErrorPresenter.showErrorAlert(title: "Invalid \(erroringConfiguration)", message: errorMessage, from: self) + self.tableView.reloadData() // Highlight erroring fields + case .saved(let tunnelConfiguration): + if let tunnel = tunnel { + // We're modifying an existing tunnel + tunnelsManager.modify(tunnel: tunnel, + tunnelConfiguration: tunnelConfiguration, + activateOnDemandSetting: activateOnDemandSetting) { [weak self] error in + if let error = error { + ErrorPresenter.showErrorAlert(error: error, from: self) + } else { + self?.dismiss(animated: true, completion: nil) + self?.delegate?.tunnelSaved(tunnel: tunnel) + } + } + } else { + // We're adding a new tunnel + tunnelsManager.add(tunnelConfiguration: tunnelConfiguration, + activateOnDemandSetting: activateOnDemandSetting) { [weak self] result in + if let error = result.error { + ErrorPresenter.showErrorAlert(error: error, from: self) + } else { + let tunnel: TunnelContainer = result.value! + self?.dismiss(animated: true, completion: nil) + self?.delegate?.tunnelSaved(tunnel: tunnel) + } + } + } + } + } + + @objc func cancelTapped() { + dismiss(animated: true, completion: nil) + self.delegate?.tunnelEditingCancelled() + } +} + +// MARK: UITableViewDataSource + +extension TunnelEditTableViewController { + override func numberOfSections(in tableView: UITableView) -> Int { + return sections.count + } + + override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { + switch sections[section] { + case .interface: + return interfaceFieldsBySection[section].count + case .peer(let peerData): + let peerFieldsToShow = peerData.shouldAllowExcludePrivateIPsControl ? peerFields : peerFields.filter { $0 != .excludePrivateIPs } + return peerFieldsToShow.count + case .addPeer: + return 1 + case .onDemand: + if activateOnDemandSetting.isActivateOnDemandEnabled { + return 4 + } else { + return 1 + } + } + } + + override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? { + switch sections[section] { + case .interface: + return section == 0 ? "Interface" : nil + case .peer: + return "Peer" + case .addPeer: + return nil + case .onDemand: + return "On-Demand Activation" + } + } + + override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { + switch sections[indexPath.section] { + case .interface: + return interfaceFieldCell(for: tableView, at: indexPath) + case .peer(let peerData): + return peerCell(for: tableView, at: indexPath, with: peerData) + case .addPeer: + return addPeerCell(for: tableView, at: indexPath) + case .onDemand: + return onDemandCell(for: tableView, at: indexPath) + } + } + + private func interfaceFieldCell(for tableView: UITableView, at indexPath: IndexPath) -> UITableViewCell { + let field = interfaceFieldsBySection[indexPath.section][indexPath.row] + switch field { + case .generateKeyPair: + return generateKeyPairCell(for: tableView, at: indexPath, with: field) + case .publicKey: + return publicKeyCell(for: tableView, at: indexPath, with: field) + default: + return interfaceFieldKeyValueCell(for: tableView, at: indexPath, with: field) + } + } + + private func generateKeyPairCell(for tableView: UITableView, at indexPath: IndexPath, with field: TunnelViewModel.InterfaceField) -> UITableViewCell { + let cell: TunnelEditButtonCell = tableView.dequeueReusableCell(for: indexPath) + cell.buttonText = field.rawValue + cell.onTapped = { [weak self] in + guard let self = self else { return } + + self.tunnelViewModel.interfaceData[.privateKey] = Curve25519.generatePrivateKey().base64EncodedString() + if let privateKeyRow = self.interfaceFieldsBySection[indexPath.section].firstIndex(of: .privateKey), + let publicKeyRow = self.interfaceFieldsBySection[indexPath.section].firstIndex(of: .publicKey) { + let privateKeyIndex = IndexPath(row: privateKeyRow, section: indexPath.section) + let publicKeyIndex = IndexPath(row: publicKeyRow, section: indexPath.section) + self.tableView.reloadRows(at: [privateKeyIndex, publicKeyIndex], with: .fade) + } + } + return cell + } + + private func publicKeyCell(for tableView: UITableView, at indexPath: IndexPath, with field: TunnelViewModel.InterfaceField) -> UITableViewCell { + let cell: TunnelEditReadOnlyKeyValueCell = tableView.dequeueReusableCell(for: indexPath) + cell.key = field.rawValue + cell.value = tunnelViewModel.interfaceData[field] + return cell + } + + private func interfaceFieldKeyValueCell(for tableView: UITableView, at indexPath: IndexPath, with field: TunnelViewModel.InterfaceField) -> UITableViewCell { + let cell: TunnelEditKeyValueCell = tableView.dequeueReusableCell(for: indexPath) + cell.key = field.rawValue + + switch field { + case .name, .privateKey: + cell.placeholderText = "Required" + cell.keyboardType = .default + case .addresses, .dns: + cell.placeholderText = "Optional" + cell.keyboardType = .numbersAndPunctuation + case .listenPort, .mtu: + cell.placeholderText = "Automatic" + cell.keyboardType = .numberPad + case .publicKey, .generateKeyPair: + cell.keyboardType = .default + } + + cell.isValueValid = (!tunnelViewModel.interfaceData.fieldsWithError.contains(field)) + // Bind values to view model + cell.value = tunnelViewModel.interfaceData[field] + if field == .dns { // While editing DNS, you might directly set exclude private IPs + cell.onValueChanged = nil + cell.onValueBeingEdited = { [weak self] value in + self?.tunnelViewModel.interfaceData[field] = value + } + } else { + cell.onValueChanged = { [weak self] value in + self?.tunnelViewModel.interfaceData[field] = value + } + cell.onValueBeingEdited = nil + } + // Compute public key live + if field == .privateKey { + cell.onValueBeingEdited = { [weak self] value in + guard let self = self else { return } + + self.tunnelViewModel.interfaceData[.privateKey] = value + if let row = self.interfaceFieldsBySection[indexPath.section].firstIndex(of: .publicKey) { + self.tableView.reloadRows(at: [IndexPath(row: row, section: indexPath.section)], with: .none) + } + } + } else { + cell.onValueBeingEdited = nil + } + return cell + } + + private func peerCell(for tableView: UITableView, at indexPath: IndexPath, with peerData: TunnelViewModel.PeerData) -> UITableViewCell { + let peerFieldsToShow = peerData.shouldAllowExcludePrivateIPsControl ? peerFields : peerFields.filter { $0 != .excludePrivateIPs } + let field = peerFieldsToShow[indexPath.row] + + switch field { + case .deletePeer: + return deletePeerCell(for: tableView, at: indexPath, peerData: peerData, field: field) + case .excludePrivateIPs: + return excludePrivateIPsCell(for: tableView, at: indexPath, peerData: peerData, field: field) + default: + return peerFieldKeyValueCell(for: tableView, at: indexPath, peerData: peerData, field: field) + } + } + + private func deletePeerCell(for tableView: UITableView, at indexPath: IndexPath, peerData: TunnelViewModel.PeerData, field: TunnelViewModel.PeerField) -> UITableViewCell { + let cell: TunnelEditButtonCell = tableView.dequeueReusableCell(for: indexPath) + cell.buttonText = field.rawValue + cell.hasDestructiveAction = true + cell.onTapped = { [weak self, weak peerData] in + guard let peerData = peerData else { return } + guard let self = self else { return } + self.showConfirmationAlert(message: "Delete this peer?", buttonTitle: "Delete", from: cell) { [weak self] in + guard let self = self else { return } + let removedSectionIndices = self.deletePeer(peer: peerData) + let shouldShowExcludePrivateIPs = (self.tunnelViewModel.peersData.count == 1 && self.tunnelViewModel.peersData[0].shouldAllowExcludePrivateIPsControl) + tableView.performBatchUpdates({ + self.tableView.deleteSections(removedSectionIndices, with: .fade) + if shouldShowExcludePrivateIPs { + if let row = self.peerFields.firstIndex(of: .excludePrivateIPs) { + let rowIndexPath = IndexPath(row: row, section: self.interfaceFieldsBySection.count /* First peer section */) + self.tableView.insertRows(at: [rowIndexPath], with: .fade) + } + + } + }) + } + } + return cell + } + + private func excludePrivateIPsCell(for tableView: UITableView, at indexPath: IndexPath, peerData: TunnelViewModel.PeerData, field: TunnelViewModel.PeerField) -> UITableViewCell { + let cell: TunnelEditSwitchCell = tableView.dequeueReusableCell(for: indexPath) + cell.message = field.rawValue + cell.isEnabled = peerData.shouldAllowExcludePrivateIPsControl + cell.isOn = peerData.excludePrivateIPsValue + cell.onSwitchToggled = { [weak self] isOn in + guard let self = self else { return } + peerData.excludePrivateIPsValueChanged(isOn: isOn, dnsServers: self.tunnelViewModel.interfaceData[.dns]) + if let row = self.peerFields.firstIndex(of: .allowedIPs) { + self.tableView.reloadRows(at: [IndexPath(row: row, section: indexPath.section)], with: .none) + } + } + return cell + } + + private func peerFieldKeyValueCell(for tableView: UITableView, at indexPath: IndexPath, peerData: TunnelViewModel.PeerData, field: TunnelViewModel.PeerField) -> UITableViewCell { + let cell: TunnelEditKeyValueCell = tableView.dequeueReusableCell(for: indexPath) + cell.key = field.rawValue + + switch field { + case .publicKey: + cell.placeholderText = "Required" + cell.keyboardType = .default + case .preSharedKey, .endpoint: + cell.placeholderText = "Optional" + cell.keyboardType = .default + case .allowedIPs: + cell.placeholderText = "Optional" + cell.keyboardType = .numbersAndPunctuation + case .persistentKeepAlive: + cell.placeholderText = "Off" + cell.keyboardType = .numberPad + case .excludePrivateIPs, .deletePeer: + cell.keyboardType = .default + } + + cell.isValueValid = !peerData.fieldsWithError.contains(field) + cell.value = peerData[field] + + if field == .allowedIPs { + cell.onValueBeingEdited = { [weak self, weak peerData] value in + guard let self = self, let peerData = peerData else { return } + + let oldValue = peerData.shouldAllowExcludePrivateIPsControl + peerData[.allowedIPs] = value + if oldValue != peerData.shouldAllowExcludePrivateIPsControl { + if let row = self.peerFields.firstIndex(of: .excludePrivateIPs) { + if peerData.shouldAllowExcludePrivateIPsControl { + self.tableView.insertRows(at: [IndexPath(row: row, section: indexPath.section)], with: .fade) + } else { + self.tableView.deleteRows(at: [IndexPath(row: row, section: indexPath.section)], with: .fade) + } + } + } + } + } else { + cell.onValueChanged = { [weak peerData] value in + peerData?[field] = value + } + } + + return cell + } + + private func addPeerCell(for tableView: UITableView, at indexPath: IndexPath) -> UITableViewCell { + let cell: TunnelEditButtonCell = tableView.dequeueReusableCell(for: indexPath) + cell.buttonText = "Add peer" + cell.onTapped = { [weak self] in + guard let self = self else { return } + let shouldHideExcludePrivateIPs = (self.tunnelViewModel.peersData.count == 1 && self.tunnelViewModel.peersData[0].shouldAllowExcludePrivateIPsControl) + let addedSectionIndices = self.appendEmptyPeer() + tableView.performBatchUpdates({ + tableView.insertSections(addedSectionIndices, with: .fade) + if shouldHideExcludePrivateIPs { + if let row = self.peerFields.firstIndex(of: .excludePrivateIPs) { + let rowIndexPath = IndexPath(row: row, section: self.interfaceFieldsBySection.count /* First peer section */) + self.tableView.deleteRows(at: [rowIndexPath], with: .fade) + } + } + }, completion: nil) + } + return cell + } + + private func onDemandCell(for tableView: UITableView, at indexPath: IndexPath) -> UITableViewCell { + if indexPath.row == 0 { + let cell: TunnelEditSwitchCell = tableView.dequeueReusableCell(for: indexPath) + cell.message = "Activate on demand" + cell.isOn = activateOnDemandSetting.isActivateOnDemandEnabled + cell.onSwitchToggled = { [weak self] isOn in + guard let self = self else { return } + let indexPaths = (1 ..< 4).map { IndexPath(row: $0, section: indexPath.section) } + if isOn { + self.activateOnDemandSetting.isActivateOnDemandEnabled = true + if self.activateOnDemandSetting.activateOnDemandOption == .none { + self.activateOnDemandSetting.activateOnDemandOption = TunnelViewModel.defaultActivateOnDemandOption() + } + self.loadSections() + self.tableView.insertRows(at: indexPaths, with: .fade) + } else { + self.activateOnDemandSetting.isActivateOnDemandEnabled = false + self.loadSections() + self.tableView.deleteRows(at: indexPaths, with: .fade) + } + } + return cell + } else { + let cell: TunnelEditSelectionListCell = tableView.dequeueReusableCell(for: indexPath) + let rowOption = activateOnDemandOptions[indexPath.row - 1] + let selectedOption = activateOnDemandSetting.activateOnDemandOption + assert(selectedOption != .none) + cell.message = TunnelViewModel.activateOnDemandOptionText(for: rowOption) + cell.isChecked = (selectedOption == rowOption) + return cell + } + } + + func appendEmptyPeer() -> IndexSet { + tunnelViewModel.appendEmptyPeer() + loadSections() + let addedPeerIndex = tunnelViewModel.peersData.count - 1 + return IndexSet(integer: interfaceFieldsBySection.count + addedPeerIndex) + } + + func deletePeer(peer: TunnelViewModel.PeerData) -> IndexSet { + tunnelViewModel.deletePeer(peer: peer) + loadSections() + return IndexSet(integer: interfaceFieldsBySection.count + peer.index) + } + + func showConfirmationAlert(message: String, buttonTitle: String, from sourceView: UIView, onConfirmed: @escaping (() -> Void)) { + let destroyAction = UIAlertAction(title: buttonTitle, style: .destructive) { _ in + onConfirmed() + } + let cancelAction = UIAlertAction(title: "Cancel", style: .cancel) + let alert = UIAlertController(title: "", message: message, preferredStyle: .actionSheet) + alert.addAction(destroyAction) + alert.addAction(cancelAction) + + // popoverPresentationController will be nil on iPhone and non-nil on iPad + alert.popoverPresentationController?.sourceView = sourceView + alert.popoverPresentationController?.sourceRect = sourceView.bounds + + self.present(alert, animated: true, completion: nil) + } +} + +// MARK: UITableViewDelegate + +extension TunnelEditTableViewController { + override func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath? { + if case .onDemand = sections[indexPath.section], indexPath.row > 0 { + return indexPath + } else { + return nil + } + } + + override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { + switch sections[indexPath.section] { + case .onDemand: + let option = activateOnDemandOptions[indexPath.row - 1] + assert(option != .none) + activateOnDemandSetting.activateOnDemandOption = option + + let indexPaths = (1 ..< 4).map { IndexPath(row: $0, section: indexPath.section) } + UIView.performWithoutAnimation { + tableView.reloadRows(at: indexPaths, with: .none) + } + default: + assertionFailure() + } + } +} |