Issue #2: Use ViewModel to evaluate server to use for counting number of blocked domains.

dns.xcodeproj/project.pbxproj

@@ -8,6 +8,9 @@
 
 /* Begin PBXFileReference section */
 		069DCCFA2F8C0DCE00F1EB16 /* dns.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = dns.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		A06A74772F8E95410093A9E4 /* .gitignore */ = {isa = PBXFileReference; lastKnownFileType = text; path = .gitignore; sourceTree = "<group>"; };
+		A06A74782F8E95410093A9E4 /* LICENCE */ = {isa = PBXFileReference; lastKnownFileType = text; path = LICENCE; sourceTree = "<group>"; };
+		A06A74792F8E95410093A9E4 /* README.md */ = {isa = PBXFileReference; lastKnownFileType = net.daringfireball.markdown; path = README.md; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFileSystemSynchronizedRootGroup section */
@@ -32,6 +35,9 @@
 		069DCCF12F8C0DCD00F1EB16 = {
 			isa = PBXGroup;
 			children = (
+				A06A74772F8E95410093A9E4 /* .gitignore */,
+				A06A74782F8E95410093A9E4 /* LICENCE */,
+				A06A74792F8E95410093A9E4 /* README.md */,
 				069DCCFC2F8C0DCE00F1EB16 /* dns */,
 				069DCCFB2F8C0DCE00F1EB16 /* Products */,
 			);
@@ -251,6 +257,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				CODE_SIGN_ENTITLEMENTS = dns/dns.entitlements;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
@@ -262,6 +269,7 @@
 				INFOPLIST_KEY_UILaunchScreen_Generation = YES;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -285,6 +293,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				CODE_SIGN_ENTITLEMENTS = dns/dns.entitlements;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
@@ -296,6 +305,7 @@
 				INFOPLIST_KEY_UILaunchScreen_Generation = YES;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",

dns/BlockedCount.swift

@@ -4,7 +4,10 @@ import Foundation
 
 struct BlockedCount: View {
 
-    @State private var txtRecord: String = "..."
+    @EnvironmentObject
+    private var viewModel: ViewModel
+
+    @State private var txtRecord: String = "…"
 
     private static let startIndex = 44
 
@@ -44,33 +47,29 @@ struct BlockedCount: View {
     }
     
     func fetchTXTRecord() {
-        let dohURL = URL(string: "https://dns.sr2.uk/dns-query?dns=DoQBAAABAAAAAAAABXN0YXRzB2ludmFsaWQAABAAAQ")!
+        let dohURL = URL(string: "https://\(viewModel.blocklist.server)/dns-query?dns=DoQBAAABAAAAAAAABXN0YXRzB2ludmFsaWQAABAAAQ")!
 
         let request = URLRequest(url: dohURL)
 
-        URLSession.shared.dataTask(with: request) { data, response, error in
-            DispatchQueue.main.async {
-                if error != nil {
-                    txtRecord = "Error"
-                    return
-                }
+        Task {
+            do {
+                let (data, _) = try await URLSession.shared.data(for: request)
 
-                guard let data = data else {
-                    txtRecord = "Error"
-                    return
+                if let count = parseResponse(data: data) {
+                    txtRecord = count
                 }
-
-                guard let count = parseResponse(data: data) else {
+                else {
                     txtRecord = "Error"
-                    return
                 }
-
-                txtRecord = count
             }
-        }.resume()
+            catch {
+                txtRecord = "Error"
+            }
+        }
     }
 }
 
 #Preview {
     BlockedCount()
+        .environmentObject(ViewModel())
 }

dns/BlocklistOption.swift

@@ -0,0 +1,69 @@
+//
+//  BlocklistOption.swift
+//  dns
+//
+//  Created by Benjamin Erhart on 14.04.26.
+//
+
+import Foundation
+
+enum BlocklistOption: String, CaseIterable, Identifiable {
+    case secure = "Secure"
+    case securePlusAdblock = "Secure + Adblock"
+
+    var id: String { rawValue }
+
+    var enabled: Bool {
+        switch self {
+        case .secure:
+            return true
+        case .securePlusAdblock:
+            return true //false
+        }
+    }
+
+    var description: String {
+        switch self {
+        case .secure:
+            return "Malware and phishing protection"
+        case .securePlusAdblock:
+            return "Security plus ad and tracker blocking"
+        }
+    }
+
+    var icon: String {
+        switch self {
+        case .secure:
+            return "shield"
+        case .securePlusAdblock:
+            return "shield.righthalf.filled"
+        }
+    }
+
+    var server: String {
+        switch self {
+        case .secure:
+            return "dns.sr2.uk"
+        case .securePlusAdblock:
+            return "dnsplus.sr2.uk"
+        }
+    }
+
+    var ipv4: String {
+        switch self {
+        case .secure:
+            return "144.76.160.194"
+        case .securePlusAdblock:
+            return "192.0.2.1"
+        }
+    }
+
+    var ipv6: String {
+        switch self {
+        case .secure:
+            return "2a01:4f8:2210:23ea::4"
+        case .securePlusAdblock:
+            return "2001:db8::1"
+        }
+    }
+}

dns/DnsApp.swift

@@ -0,0 +1,16 @@
+
+import SwiftUI
+
+@main
+struct DnsApp: App {
+
+    @StateObject
+    var viewModel = ViewModel()
+
+    var body: some Scene {
+        WindowGroup {
+            HomeView()
+                .environmentObject(viewModel)
+        }
+    }
+}

dns/HomeView.swift

@@ -1,67 +1,6 @@
 
 import SwiftUI
 
-enum BlocklistOption: String, CaseIterable, Identifiable {
-    case secure = "Secure"
-    case securePlusAdblock = "Secure + Adblock"
-
-    var id: String { rawValue }
-
-    var enabled: Bool {
-        switch self {
-        case .secure:
-            return true
-        case .securePlusAdblock:
-            return false
-        }
-    }
-    
-    var description: String {
-        switch self {
-        case .secure:
-            return "Malware and phishing protection"
-        case .securePlusAdblock:
-            return "Security plus ad and tracker blocking"
-        }
-    }
-
-    var icon: String {
-        switch self {
-        case .secure:
-            return "shield"
-        case .securePlusAdblock:
-            return "shield.righthalf.filled"
-        }
-    }
-    
-    var server: String {
-        switch self {
-        case .secure:
-            return "dns.sr2.uk"
-        case .securePlusAdblock:
-            return "dnsplus.sr2.uk"
-        }
-    }
-    
-    var ipv4: String {
-        switch self {
-        case .secure:
-            return "144.76.160.194"
-        case .securePlusAdblock:
-            return "192.0.2.1"
-        }
-    }
-    
-    var ipv6: String {
-        switch self {
-        case .secure:
-            return "2a01:4f8:2210:23ea::4"
-        case .securePlusAdblock:
-            return "2001:db8::1"
-        }
-    }
-}
-
 enum ServiceStatus {
     case pending
     case operational
@@ -96,8 +35,11 @@ enum ServiceStatus {
 }
 
 struct HomeView: View {
+
+    @EnvironmentObject
+    private var viewModel: ViewModel
+
     @State private var isEnabled = false
-    @State private var selectedBlocklist: BlocklistOption = .secure
     @State private var serviceStatus: ServiceStatus = .operational
 
     private let falsePositiveURL = URL(string: "https://www.sr2.uk/contact")!
@@ -135,13 +77,13 @@ struct HomeView: View {
                     ForEach(BlocklistOption.allCases) { option in
                         BlocklistRow(
                             option: option,
-                            isSelected: selectedBlocklist == option
+                            isSelected: viewModel.blocklist == option
                         )
                         .contentShape(Rectangle())
                         .onTapGesture {
                             guard option.enabled else { return }
                             withAnimation(.spring(duration: 0.3)) {
-                                selectedBlocklist = option
+                                viewModel.blocklist = option
                             }
                         }
                         .opacity(option.enabled ? 1 : 0.6)
@@ -166,7 +108,7 @@ struct HomeView: View {
                         HStack {
                             Label("Server", systemImage: "server.rack")
                             Spacer()
-                            Text(selectedBlocklist.server)
+                            Text(viewModel.blocklist.server)
                                 .foregroundStyle(.secondary)
                                 .font(.system(.body, design: .monospaced))
                         }
@@ -174,7 +116,7 @@ struct HomeView: View {
                         HStack {
                             Label("IPv4", systemImage: "globe")
                             Spacer()
-                            Text(selectedBlocklist.ipv4)
+                            Text(viewModel.blocklist.ipv4)
                                 .foregroundStyle(.secondary)
                                 .font(.system(.body, design: .monospaced))
                         }
@@ -182,7 +124,7 @@ struct HomeView: View {
                         HStack {
                             Label("IPv6", systemImage: "globe")
                             Spacer()
-                            Text(selectedBlocklist.ipv6)
+                            Text(viewModel.blocklist.ipv6)
                                 .foregroundStyle(.secondary)
                                 .font(.system(.body, design: .monospaced))
                         }
@@ -278,4 +220,5 @@ struct HomeView: View {
 
 #Preview {
     HomeView()
+        .environmentObject(ViewModel())
 }

dns/ViewModel.swift

@@ -0,0 +1,16 @@
+//
+//  ViewModel.swift
+//  dns
+//
+//  Created by Benjamin Erhart on 14.04.26.
+//
+
+import Foundation
+import Combine
+
+class ViewModel: NSObject, ObservableObject {
+
+    @Published
+    var blocklist: BlocklistOption = .secure
+
+}

dns/dns.entitlements

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.developer.networking.networkextension</key>
+	<array>
+		<string>dns-settings</string>
+	</array>
+</dict>
+</plist>

dns/dnsApp.swift

@@ -1,11 +0,0 @@
-
-import SwiftUI
-
-@main
-struct dnsApp: App {
-    var body: some Scene {
-        WindowGroup {
-            HomeView()
-        }
-    }
-}