home: show confirmation popup for UTM downloads

Resolves #6156

Platform/Shared/ContentView.swift

@@ -35,6 +35,7 @@ struct ContentView: View {
     @StateObject private var releaseHelper = UTMReleaseHelper()
     @State private var newPopupPresented = false
     @State private var openSheetPresented = false
+    @State private var alertItem: AlertItem?
     @Environment(\.openURL) var openURL
     @AppStorage("ServerAutostart") private var isServerAutostart: Bool = false
 
@@ -50,6 +51,14 @@ struct ContentView: View {
         }, content: {
             VMReleaseNotesView(helper: releaseHelper).padding()
         })
+        .alert(item: $alertItem) { item in
+            switch item {
+            case .downloadUrl(let url):
+                return Alert(title: Text("Download VM"), message: Text("Do you want to download '\(url)'?"), primaryButton: .cancel(), secondaryButton: .default(Text("Download")) {
+                    data.downloadUTMZip(from: url)
+                })
+            }
+        }
         .onReceive(NSNotification.ShowReleaseNotes) { _ in
             Task {
                 await releaseHelper.fetchReleaseNotes(force: true)
@@ -115,13 +124,17 @@ struct ContentView: View {
     }
     
     private func handleURL(url: URL) {
-        data.busyWorkAsync {
-            if url.isFileURL {
+        if let components = URLComponents(url: url, resolvingAgainstBaseURL: false),
+           components.scheme?.lowercased() == "utm",
+           components.host == "downloadVM",
+           let urlParameter = components.queryItems?.first(where: { $0.name == "url" })?.value,
+           let url = URL(string: urlParameter) {
+            if alertItem == nil {
+                alertItem = .downloadUrl(url)
+            }
+        } else if url.isFileURL {
+            data.busyWorkAsync {
                 try await importUTM(url: url)
-            } else if let components = URLComponents(url: url, resolvingAgainstBaseURL: false),
-                      let scheme = components.scheme,
-                      scheme.lowercased() == "utm" {
-                try await handleUTMURL(with: components)
             }
         }
     }
@@ -197,9 +210,6 @@ struct ContentView: View {
                     data.automationSendMouse(to: vm, urlComponents: components)
                 }
                 break
-            case "downloadVM":
-                await data.downloadUTMZip(from: components)
-                break
             default:
                 return
             }
@@ -246,6 +256,19 @@ extension ContentView: DropDelegate {
     }
 }
 
+extension ContentView {
+    private enum AlertItem: Identifiable {
+        case downloadUrl(URL)
+
+        var id: Int {
+            switch self {
+            case .downloadUrl(let url):
+                return url.hashValue
+            }
+        }
+    }
+}
+
 struct ContentView_Previews: PreviewProvider {
     static var previews: some View {
         ContentView()

Platform/UTMData.swift

@@ -699,12 +699,7 @@ struct AlertMessage: Identifiable {
 
     /// Create a new VM by downloading a .zip and extracting it
     /// - Parameter components: Download URL components
-    func downloadUTMZip(from components: URLComponents) async {
-        guard let urlParameter = components.queryItems?.first(where: { $0.name == "url" })?.value,
-           let url = URL(string: urlParameter) else {
-               showErrorAlert(message: NSLocalizedString("Failed to parse download URL.", comment: "UTMData"))
-               return
-        }
+    func downloadUTMZip(from url: URL) {
         let task = UTMDownloadVMTask(for: url)
         listAdd(pendingVM: task.pendingVM)
         Task {