Basic no stores view (#66)

Secretive/Views/ContentView.swift

@@ -20,6 +20,7 @@ struct ContentView<UpdaterType: UpdaterProtocol, AgentStatusCheckerType: AgentSt
             if !agentStatusChecker.running {
                 agentNotice()
             }
+            if storeList.anyAvailable {
             NavigationView {
                 List(selection: $active) {
                     ForEach(storeList.stores) { store in
@@ -68,6 +69,9 @@ struct ContentView<UpdaterType: UpdaterProtocol, AgentStatusCheckerType: AgentSt
                     }
                 }
             }
+            } else {
+                NoStoresView()
+            }
         }
     }
 

Secretive/Views/NoStoresView.swift

@@ -0,0 +1,29 @@
+//
+//  NoStoresView.swift
+//  Secretive
+//
+//  Created by Max Goedjen on 3/20/20.
+//  Copyright © 2020 Max Goedjen. All rights reserved.
+//
+
+import SwiftUI
+
+struct NoStoresView: View {
+    var body: some View {
+        VStack {
+            Text("No Secure Storage Available").bold()
+            Text("Your Mac doesn't have a Secure Enclave, and there's not a compatible Smart Card inserted.")
+            Button(action: {
+                NSWorkspace.shared.open(URL(string: "https://www.yubico.com/products/compare-yubikey-5-series/")!)
+            }) {
+                Text("If you're looking to add one to your Mac, the YubiKey 5 Series are great.")
+            }
+        }.padding()
+    }
+}
+
+struct NoStoresView_Previews: PreviewProvider {
+    static var previews: some View {
+        NoStoresView()
+    }
+}