iOS: Refactor importFromFile

So that it can be used in macOS as well

WireGuard/WireGuard.xcodeproj/project.pbxproj

@@ -107,6 +107,10 @@
 		6FB1BDDA21D5170800A991BF /* NetworkExtension.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 6FB1BDB621D4F8B800A991BF /* NetworkExtension.framework */; };
 		6FBA101521D613F90051C35F /* Application.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FBA101321D613F30051C35F /* Application.swift */; };
 		6FBA101821D656000051C35F /* StatusMenu.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FBA101621D655340051C35F /* StatusMenu.swift */; };
+		6FBA103B21D6B4290051C35F /* ErrorPresenterProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FBA103A21D6B4280051C35F /* ErrorPresenterProtocol.swift */; };
+		6FBA103E21D6B6D70051C35F /* TunnelImporter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FBA103D21D6B6D70051C35F /* TunnelImporter.swift */; };
+		6FBA103F21D6B6FF0051C35F /* TunnelImporter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FBA103D21D6B6D70051C35F /* TunnelImporter.swift */; };
+		6FBA104021D6B7040051C35F /* ErrorPresenterProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FBA103A21D6B4280051C35F /* ErrorPresenterProtocol.swift */; };
 		6FDEF7E421846C1A00D8FBF6 /* libwg-go.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 6FDEF7E321846C1A00D8FBF6 /* libwg-go.a */; };
 		6FDEF7E62185EFB200D8FBF6 /* QRScanViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FDEF7E52185EFAF00D8FBF6 /* QRScanViewController.swift */; };
 		6FDEF7FB21863B6100D8FBF6 /* unzip.c in Sources */ = {isa = PBXBuildFile; fileRef = 6FDEF7F621863B6100D8FBF6 /* unzip.c */; };
@@ -250,6 +254,8 @@
 		6FB1BDB621D4F8B800A991BF /* NetworkExtension.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = NetworkExtension.framework; path = Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/NetworkExtension.framework; sourceTree = DEVELOPER_DIR; };
 		6FBA101321D613F30051C35F /* Application.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Application.swift; sourceTree = "<group>"; };
 		6FBA101621D655340051C35F /* StatusMenu.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StatusMenu.swift; sourceTree = "<group>"; };
+		6FBA103A21D6B4280051C35F /* ErrorPresenterProtocol.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ErrorPresenterProtocol.swift; sourceTree = "<group>"; };
+		6FBA103D21D6B6D70051C35F /* TunnelImporter.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = TunnelImporter.swift; sourceTree = "<group>"; };
 		6FDEF7E321846C1A00D8FBF6 /* libwg-go.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; path = "libwg-go.a"; sourceTree = BUILT_PRODUCTS_DIR; };
 		6FDEF7E52185EFAF00D8FBF6 /* QRScanViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = QRScanViewController.swift; sourceTree = "<group>"; };
 		6FDEF7F621863B6100D8FBF6 /* unzip.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = unzip.c; sourceTree = "<group>"; };
@@ -383,6 +389,8 @@
 				6FB1BD5E21D2607A00A991BF /* macOS */,
 				6F7774DE217181B1006A79B3 /* iOS */,
 				6F628C3C217F09E9003482A3 /* TunnelViewModel.swift */,
+				6FBA103D21D6B6D70051C35F /* TunnelImporter.swift */,
+				6FBA103A21D6B4280051C35F /* ErrorPresenterProtocol.swift */,
 			);
 			path = UI;
 			sourceTree = "<group>";
@@ -1022,12 +1030,14 @@
 				6FB1BDBB21D50F0200A991BF /* Localizable.strings in Sources */,
 				6FB1BDBC21D50F0200A991BF /* ringlogger.c in Sources */,
 				6FB1BDBD21D50F0200A991BF /* ringlogger.h in Sources */,
+				6FBA103F21D6B6FF0051C35F /* TunnelImporter.swift in Sources */,
 				6FB1BDBE21D50F0200A991BF /* Logger.swift in Sources */,
 				6FB1BDBF21D50F0200A991BF /* TunnelConfiguration+WgQuickConfig.swift in Sources */,
 				6FB1BDC021D50F0200A991BF /* NETunnelProviderProtocol+Extension.swift in Sources */,
 				6FBA101821D656000051C35F /* StatusMenu.swift in Sources */,
 				6FB1BDC121D50F0200A991BF /* String+ArrayConversion.swift in Sources */,
 				6FB1BDC221D50F0300A991BF /* LegacyConfigMigration.swift in Sources */,
+				6FBA104021D6B7040051C35F /* ErrorPresenterProtocol.swift in Sources */,
 				6FB1BDC321D50F0300A991BF /* TunnelConfiguration.swift in Sources */,
 				6FB1BDC421D50F0300A991BF /* IPAddressRange.swift in Sources */,
 				6FB1BDC521D50F0300A991BF /* Endpoint.swift in Sources */,
@@ -1090,6 +1100,7 @@
 				6F628C3D217F09E9003482A3 /* TunnelViewModel.swift in Sources */,
 				5F4541A621C4449E00994C13 /* ButtonCell.swift in Sources */,
 				5F45419821C2D60500994C13 /* KeyValueCell.swift in Sources */,
+				6FBA103E21D6B6D70051C35F /* TunnelImporter.swift in Sources */,
 				6F919EC3218A2AE90023B400 /* ErrorPresenter.swift in Sources */,
 				5F9696AA21CD6AE6008063FE /* LegacyConfigMigration.swift in Sources */,
 				6F5A2B4821AFF49A0081EDD8 /* FileManager+Extension.swift in Sources */,
@@ -1104,6 +1115,7 @@
 				6F628C41217F47DB003482A3 /* TunnelDetailTableViewController.swift in Sources */,
 				6F61F1EB21B937EF00483816 /* WireGuardResult.swift in Sources */,
 				6F7774F321774263006A79B3 /* TunnelEditTableViewController.swift in Sources */,
+				6FBA103B21D6B4290051C35F /* ErrorPresenterProtocol.swift in Sources */,
 				6FDEF802218646BA00D8FBF6 /* ZipArchive.swift in Sources */,
 				5F45419021C2D53800994C13 /* SwitchCell.swift in Sources */,
 				6FB1017921C57DE600766195 /* MockTunnels.swift in Sources */,

WireGuard/WireGuard/UI/ErrorPresenterProtocol.swift

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: MIT
+// Copyright © 2018 WireGuard LLC. All Rights Reserved.
+
+protocol ErrorPresenterProtocol {
+    static func showErrorAlert(title: String, message: String, from sourceVC: AnyObject?, onPresented: (() -> Void)?, onDismissal: (() -> Void)?)
+}
+
+extension ErrorPresenterProtocol {
+    static func showErrorAlert(title: String, message: String, from sourceVC: AnyObject?, onPresented: (() -> Void)?) {
+        showErrorAlert(title: title, message: message, from: sourceVC, onPresented: onPresented, onDismissal: nil)
+    }
+
+    static func showErrorAlert(title: String, message: String, from sourceVC: AnyObject?, onDismissal: (() -> Void)?) {
+        showErrorAlert(title: title, message: message, from: sourceVC, onPresented: nil, onDismissal: onDismissal)
+    }
+
+    static func showErrorAlert(title: String, message: String, from sourceVC: AnyObject?) {
+        showErrorAlert(title: title, message: message, from: sourceVC, onPresented: nil, onDismissal: nil)
+    }
+
+    static func showErrorAlert(error: WireGuardAppError, from sourceVC: AnyObject?, onPresented: (() -> Void)? = nil, onDismissal: (() -> Void)? = nil) {
+        let (title, message) = error.alertText
+        showErrorAlert(title: title, message: message, from: sourceVC, onPresented: onPresented, onDismissal: onDismissal)
+    }
+}

WireGuard/WireGuard/UI/TunnelImporter.swift

@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: MIT
+// Copyright © 2018 WireGuard LLC. All Rights Reserved.
+
+import Foundation
+
+class TunnelImporter {
+    static func importFromFile(url: URL, into tunnelsManager: TunnelsManager, sourceVC: AnyObject?, errorPresenterType: ErrorPresenterProtocol.Type, completionHandler: (() -> Void)? = nil) {
+        if url.pathExtension == "zip" {
+            ZipImporter.importConfigFiles(from: url) { result in
+                if let error = result.error {
+                    errorPresenterType.showErrorAlert(error: error, from: sourceVC)
+                    return
+                }
+                let configs = result.value!
+                tunnelsManager.addMultiple(tunnelConfigurations: configs.compactMap { $0 }) { numberSuccessful in
+                    if numberSuccessful == configs.count {
+                        completionHandler?()
+                        return
+                    }
+                    let title = tr(format: "alertImportedFromZipTitle (%d)", numberSuccessful)
+                    let message = tr(format: "alertImportedFromZipMessage (%1$d of %2$d)", numberSuccessful, configs.count)
+                    errorPresenterType.showErrorAlert(title: title, message: message, from: sourceVC, onPresented: completionHandler)
+                }
+            }
+        } else /* if (url.pathExtension == "conf") -- we assume everything else is a conf */ {
+            let fileBaseName = url.deletingPathExtension().lastPathComponent.trimmingCharacters(in: .whitespacesAndNewlines)
+            if let fileContents = try? String(contentsOf: url),
+                let tunnelConfiguration = try? TunnelConfiguration(fromWgQuickConfig: fileContents, called: fileBaseName) {
+                tunnelsManager.add(tunnelConfiguration: tunnelConfiguration) { result in
+                    if let error = result.error {
+                        errorPresenterType.showErrorAlert(error: error, from: sourceVC, onPresented: completionHandler)
+                    } else {
+                        completionHandler?()
+                    }
+                }
+            } else {
+                errorPresenterType.showErrorAlert(title: tr("alertUnableToImportTitle"), message: tr("alertUnableToImportMessage"),
+                                              from: sourceVC, onPresented: completionHandler)
+            }
+        }
+    }
+
+}

WireGuard/WireGuard/UI/iOS/AppDelegate.swift

@@ -27,7 +27,8 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     }
 
     func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey: Any] = [:]) -> Bool {
-        mainVC?.tunnelsListVC?.importFromFile(url: url) {
+        guard let tunnelsManager = mainVC?.tunnelsManager else { return true }
+        TunnelImporter.importFromFile(url: url, into: tunnelsManager, sourceVC: mainVC, errorPresenterType: ErrorPresenter.self) {
             _ = FileManager.deleteFile(at: url)
         }
         return true

WireGuard/WireGuard/UI/iOS/ErrorPresenter.swift

@@ -4,14 +4,9 @@
 import UIKit
 import os.log
 
-class ErrorPresenter {
+class ErrorPresenter: ErrorPresenterProtocol {
-    static func showErrorAlert(error: WireGuardAppError, from sourceVC: UIViewController?, onPresented: (() -> Void)? = nil, onDismissal: (() -> Void)? = nil) {
+    static func showErrorAlert(title: String, message: String, from sourceVC: AnyObject?, onPresented: (() -> Void)?, onDismissal: (() -> Void)?) {
-        let (title, message) = error.alertText
+        guard let sourceVC = sourceVC as? UIViewController else { return }
-        showErrorAlert(title: title, message: message, from: sourceVC, onPresented: onPresented, onDismissal: onDismissal)
-    }
-
-    static func showErrorAlert(title: String, message: String, from sourceVC: UIViewController?, onPresented: (() -> Void)? = nil, onDismissal: (() -> Void)? = nil) {
-        guard let sourceVC = sourceVC else { return }
 
         let okAction = UIAlertAction(title: "OK", style: .default) { _ in
             onDismissal?()

WireGuard/WireGuard/UI/iOS/ViewController/TunnelsListTableViewController.swift

@@ -157,49 +157,13 @@ class TunnelsListTableViewController: UIViewController {
         scanQRCodeNC.modalPresentationStyle = .fullScreen
         present(scanQRCodeNC, animated: true)
     }
-
-    func importFromFile(url: URL, completionHandler: (() -> Void)?) {
-        guard let tunnelsManager = tunnelsManager else { return }
-        if url.pathExtension == "zip" {
-            ZipImporter.importConfigFiles(from: url) { [weak self] result in
-                if let error = result.error {
-                    ErrorPresenter.showErrorAlert(error: error, from: self)
-                    return
-                }
-                let configs = result.value!
-                tunnelsManager.addMultiple(tunnelConfigurations: configs.compactMap { $0 }) { [weak self] numberSuccessful in
-                    if numberSuccessful == configs.count {
-                        completionHandler?()
-                        return
-                    }
-                    let title = tr(format: "alertImportedFromZipTitle (%d)", numberSuccessful)
-                    let message = tr(format: "alertImportedFromZipMessage (%1$d of %2$d)", numberSuccessful, configs.count)
-                    ErrorPresenter.showErrorAlert(title: title, message: message, from: self, onPresented: completionHandler)
-                }
-            }
-        } else /* if (url.pathExtension == "conf") -- we assume everything else is a conf */ {
-            let fileBaseName = url.deletingPathExtension().lastPathComponent.trimmingCharacters(in: .whitespacesAndNewlines)
-            if let fileContents = try? String(contentsOf: url),
-                let tunnelConfiguration = try? TunnelConfiguration(fromWgQuickConfig: fileContents, called: fileBaseName) {
-                tunnelsManager.add(tunnelConfiguration: tunnelConfiguration) { [weak self] result in
-                    if let error = result.error {
-                        ErrorPresenter.showErrorAlert(error: error, from: self, onPresented: completionHandler)
-                    } else {
-                        completionHandler?()
-                    }
-                }
-            } else {
-                ErrorPresenter.showErrorAlert(title: tr("alertUnableToImportTitle"), message: tr("alertUnableToImportMessage"),
-                                              from: self, onPresented: completionHandler)
-            }
-        }
-    }
 }
 
 extension TunnelsListTableViewController: UIDocumentPickerDelegate {
     func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
-        urls.forEach {
+        guard let tunnelsManager = tunnelsManager else { return }
-            importFromFile(url: $0, completionHandler: nil)
+        urls.forEach { url in
+            TunnelImporter.importFromFile(url: url, into: tunnelsManager, sourceVC: self, errorPresenterType: ErrorPresenter.self)
         }
     }
 }