Jason A. Donenfeld
75 lines
3.3 KiB
Swift
75 lines
3.3 KiB
Swift
// SPDX-License-Identifier: MIT
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// Copyright © 2018 WireGuard LLC. All Rights Reserved.
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import UIKit
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import os.log
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class ErrorPresenter {
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static func errorMessage(for error: Error) -> (String, String)? {
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switch (error) {
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// TunnelManagementError
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case TunnelManagementError.tunnelAlreadyExistsWithThatName:
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return ("Name already exists", "A tunnel with that name already exists. Please choose a different name.")
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case TunnelManagementError.vpnSystemErrorOnAddTunnel:
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return ("Unable to create tunnel", "Internal error")
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case TunnelManagementError.vpnSystemErrorOnModifyTunnel:
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return ("Unable to modify tunnel", "Internal error")
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case TunnelManagementError.vpnSystemErrorOnRemoveTunnel:
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return ("Unable to remove tunnel", "Internal error")
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// TunnelActivationError
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case TunnelActivationError.noEndpoint:
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return ("Endpoint missing", "There must be at least one peer with an endpoint")
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case TunnelActivationError.dnsResolutionFailed:
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return ("DNS resolution failure", "One or more endpoint domains could not be resolved")
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case TunnelActivationError.tunnelActivationFailed:
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return ("Activation failure", "The tunnel could not be activated due to an internal error")
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case TunnelActivationError.attemptingActivationWhenAnotherTunnelIsBusy(let otherTunnelStatus):
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let statusString: String = {
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switch (otherTunnelStatus) {
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case .active: fallthrough
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case .reasserting: fallthrough
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case .restarting:
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return "active"
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case .activating: fallthrough
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case .resolvingEndpointDomains:
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return "being activated"
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case .deactivating:
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return "being deactivated"
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case .inactive:
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fatalError()
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}
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}()
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return ("Activation failure", "Another tunnel is currently \(statusString). Only one tunnel may be in operation at a time.")
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default:
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os_log("ErrorPresenter: Error not presented: %{public}@", log: OSLog.default, type: .error, "\(error)")
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return nil
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}
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}
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static func showErrorAlert(error: Error, from sourceVC: UIViewController?, onDismissal: (() -> Void)? = nil) {
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guard let sourceVC = sourceVC else { return }
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guard let (title, message) = ErrorPresenter.errorMessage(for: error) else { return }
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let okAction = UIAlertAction(title: "OK", style: .default) { (_) in
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onDismissal?()
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}
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let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
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alert.addAction(okAction)
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sourceVC.present(alert, animated: true)
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}
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static func showErrorAlert(title: String, message: String, from sourceVC: UIViewController?, onDismissal: (() -> Void)? = nil) {
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guard let sourceVC = sourceVC else { return }
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let okAction = UIAlertAction(title: "OK", style: .default) { (_) in
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onDismissal?()
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}
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let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
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alert.addAction(okAction)
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sourceVC.present(alert, animated: true)
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}
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}
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