on-demand: Introducing ActivateOnDemandViewModel

Signed-off-by: Roopesh Chander <roop@roopc.net>

WireGuard/WireGuard.xcodeproj/project.pbxproj

@@ -77,6 +77,8 @@
 		6F7F7E5F21C7D74B00527607 /* TunnelErrors.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F7F7E5E21C7D74B00527607 /* TunnelErrors.swift */; };
 		6F89E17A21EDEB0E00C97BB9 /* StatusItemController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F89E17921EDEB0E00C97BB9 /* StatusItemController.swift */; };
 		6F89E17C21F090CC00C97BB9 /* TunnelsTracker.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F89E17B21F090CC00C97BB9 /* TunnelsTracker.swift */; };
+		6F8F0D7122258153000E8335 /* ActivateOnDemandViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F8F0D7022258153000E8335 /* ActivateOnDemandViewModel.swift */; };
+		6F8F0D7222258153000E8335 /* ActivateOnDemandViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F8F0D7022258153000E8335 /* ActivateOnDemandViewModel.swift */; };
 		6F919EC3218A2AE90023B400 /* ErrorPresenter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F919EC2218A2AE90023B400 /* ErrorPresenter.swift */; };
 		6F919ED9218C65C50023B400 /* wireguard_doc_logo_22x29.png in Resources */ = {isa = PBXBuildFile; fileRef = 6F919ED5218C65C50023B400 /* wireguard_doc_logo_22x29.png */; };
 		6F919EDA218C65C50023B400 /* wireguard_doc_logo_44x58.png in Resources */ = {isa = PBXBuildFile; fileRef = 6F919ED6218C65C50023B400 /* wireguard_doc_logo_44x58.png */; };
@@ -294,6 +296,7 @@
 		6F7F7E5E21C7D74B00527607 /* TunnelErrors.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TunnelErrors.swift; sourceTree = "<group>"; };
 		6F89E17921EDEB0E00C97BB9 /* StatusItemController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StatusItemController.swift; sourceTree = "<group>"; };
 		6F89E17B21F090CC00C97BB9 /* TunnelsTracker.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TunnelsTracker.swift; sourceTree = "<group>"; };
+		6F8F0D7022258153000E8335 /* ActivateOnDemandViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ActivateOnDemandViewModel.swift; sourceTree = "<group>"; };
 		6F919EC2218A2AE90023B400 /* ErrorPresenter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ErrorPresenter.swift; sourceTree = "<group>"; };
 		6F919ED5218C65C50023B400 /* wireguard_doc_logo_22x29.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = wireguard_doc_logo_22x29.png; sourceTree = "<group>"; };
 		6F919ED6218C65C50023B400 /* wireguard_doc_logo_44x58.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = wireguard_doc_logo_44x58.png; sourceTree = "<group>"; };
@@ -474,6 +477,7 @@
 				6FB1BD5E21D2607A00A991BF /* macOS */,
 				6F7774DE217181B1006A79B3 /* iOS */,
 				6F628C3C217F09E9003482A3 /* TunnelViewModel.swift */,
+				6F8F0D7022258153000E8335 /* ActivateOnDemandViewModel.swift */,
 				6FBA103D21D6B6D70051C35F /* TunnelImporter.swift */,
 				6FBA103A21D6B4280051C35F /* ErrorPresenterProtocol.swift */,
 				6B62E45E220A6FA900EF34A6 /* PrivateDataConfirmation.swift */,
@@ -1132,6 +1136,7 @@
 			files = (
 				6FBA101521D613F90051C35F /* Application.swift in Sources */,
 				6FB1BDCC21D50F5300A991BF /* TunnelsManager.swift in Sources */,
+				6F8F0D7222258153000E8335 /* ActivateOnDemandViewModel.swift in Sources */,
 				6FB1BDCD21D50F5300A991BF /* ActivateOnDemandSetting.swift in Sources */,
 				6FB1BDCE21D50F5300A991BF /* TunnelStatus.swift in Sources */,
 				6FB1BDD021D50F5300A991BF /* TunnelErrors.swift in Sources */,
@@ -1232,6 +1237,7 @@
 				5F45417D21C1B23600994C13 /* UITableViewCell+Reuse.swift in Sources */,
 				5F45419221C2D55800994C13 /* CheckmarkCell.swift in Sources */,
 				6FE254FF219C60290028284D /* ZipExporter.swift in Sources */,
+				6F8F0D7122258153000E8335 /* ActivateOnDemandViewModel.swift in Sources */,
 				6B586C53220CBA6D00427C51 /* Data+KeyEncoding.swift in Sources */,
 				6F693A562179E556008551C1 /* Endpoint.swift in Sources */,
 				6FDEF7E62185EFB200D8FBF6 /* QRScanViewController.swift in Sources */,

WireGuard/WireGuard/Base.lproj/Localizable.strings

@@ -81,6 +81,17 @@
 
 "tunnelSectionTitleOnDemand" = "On-Demand Activation";
 
+"tunnelOnDemandCellular" = "Cellular";
+"tunnelOnDemandEthernet" = "Ethernet";
+"tunnelOnDemandWiFi" = "Wi-Fi";
+"tunnelOnDemandSSIDDescription" = "Selected SSIDs";
+"tunnelOnDemandSSIDescriptionMac" = "SSIDs";
+"tunnelOnDemandSSIDEdit" = "Select SSIDs";
+
+"tunnelOnDemandAnySSID" = "Any SSID";
+"tunnelOnDemandOnlySelectedSSIDs" = "Only selected SSIDs";
+"tunnelOnDemandExceptSelectedSSIDs" = "Except selected SSIDs";
+
 "tunnelOnDemandKey" = "Activate on demand";
 "tunnelOnDemandOptionOff" = "Off";
 "tunnelOnDemandOptionWiFiOnly" = "Wi-Fi only";

WireGuard/WireGuard/UI/ActivateOnDemandViewModel.swift

@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: MIT
+// Copyright © 2018-2019 WireGuard LLC. All Rights Reserved.
+
+import Foundation
+
+class ActivateOnDemandViewModel {
+    enum OnDemandField {
+        case nonWiFiInterface
+        case wiFiInterface
+        case ssidDescription
+        case ssidEdit
+
+        var localizedUIString: String {
+            switch self {
+            case .nonWiFiInterface:
+                #if os(iOS)
+                return tr("tunnelOnDemandCellular")
+                #elseif os(macOS)
+                return tr("tunnelOnDemandEthernet")
+                #else
+                #error("Unimplemented")
+                #endif
+            case .wiFiInterface: return tr("tunnelOnDemandWiFi")
+            case .ssidDescription: return tr("tunnelOnDemandSSIDDescription")
+            case .ssidEdit: return tr("tunnelOnDemandSSIDEdit")
+            }
+        }
+    }
+
+    enum OnDemandSSIDOption {
+        case anySSID
+        case onlySpecificSSIDs
+        case exceptSpecificSSIDs
+
+        var localizedUIString: String {
+            switch self {
+            case .anySSID: return tr("tunnelOnDemandAnySSID")
+            case .onlySpecificSSIDs: return tr("tunnelOnDemandOnlySelectedSSIDs")
+            case .exceptSpecificSSIDs: return tr("tunnelOnDemandExceptSelectedSSIDs")
+            }
+        }
+    }
+
+    var isNonWiFiInterfaceEnabled = false
+    var isWiFiInterfaceEnabled = false
+    var selectedSSIDs = [String]()
+    var ssidOption: OnDemandSSIDOption = .anySSID
+}
+
+extension ActivateOnDemandViewModel {
+    convenience init(from option: ActivateOnDemandOption) {
+        self.init()
+        switch option {
+        case .none:
+            break
+        case .wiFiInterfaceOnly(let onDemandSSIDOption):
+            isWiFiInterfaceEnabled = true
+            (ssidOption, selectedSSIDs) = ssidViewModel(from: onDemandSSIDOption)
+        case .nonWiFiInterfaceOnly:
+            isNonWiFiInterfaceEnabled = true
+        case .anyInterface(let onDemandSSIDOption):
+            isWiFiInterfaceEnabled = true
+            isNonWiFiInterfaceEnabled = true
+            (ssidOption, selectedSSIDs) = ssidViewModel(from: onDemandSSIDOption)
+        }
+    }
+
+    func toOnDemandOption() -> ActivateOnDemandOption {
+        switch (isWiFiInterfaceEnabled, isNonWiFiInterfaceEnabled) {
+        case (false, false):
+            return .none
+        case (false, true):
+            return .nonWiFiInterfaceOnly
+        case (true, false):
+            return .wiFiInterfaceOnly(toSSIDOption())
+        case (true, true):
+            return .anyInterface(toSSIDOption())
+        }
+    }
+}
+
+extension ActivateOnDemandViewModel {
+    func isEnabled(field: OnDemandField) -> Bool {
+        switch field {
+        case .nonWiFiInterface:
+            return isNonWiFiInterfaceEnabled
+        case .wiFiInterface:
+            return isWiFiInterfaceEnabled
+        default:
+            return false
+        }
+    }
+
+    func setEnabled(field: OnDemandField, isEnabled: Bool) {
+        switch field {
+        case .nonWiFiInterface:
+            isNonWiFiInterfaceEnabled = isEnabled
+        case .wiFiInterface:
+            isWiFiInterfaceEnabled = isEnabled
+        default:
+            break
+        }
+    }
+}
+
+private extension ActivateOnDemandViewModel {
+    func ssidViewModel(from ssidOption: ActivateOnDemandSSIDOption) -> (OnDemandSSIDOption, [String]) {
+        switch ssidOption {
+        case .anySSID:
+            return (.anySSID, [])
+        case .onlySpecificSSIDs(let ssids):
+            return (.onlySpecificSSIDs, ssids)
+        case .exceptSpecificSSIDs(let ssids):
+            return (.exceptSpecificSSIDs, ssids)
+        }
+    }
+
+    func toSSIDOption() -> ActivateOnDemandSSIDOption {
+        switch ssidOption {
+        case .anySSID:
+            return .anySSID
+        case .onlySpecificSSIDs:
+            return .onlySpecificSSIDs(selectedSSIDs)
+        case .exceptSpecificSSIDs:
+            return .exceptSpecificSSIDs(selectedSSIDs)
+        }
+    }
+}