Stop to download additional provider resources

Passepartout-iOS/Scenes/ServiceViewController.swift

@@ -247,7 +247,14 @@ class ServiceViewController: UIViewController, TableModelHost {
             }
             vpn.reconnect { (error) in
                 guard error == nil else {
+
+                    // XXX: delay to avoid weird toggle state
+                    DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(500)) {
                         cell.setOn(false, animated: true)
+                        if error as? ApplicationError == .externalResources {
+                            self.requireDownload()
+                        }
+                    }
                     return
                 }
                 self.reloadModel()
@@ -439,6 +446,27 @@ class ServiceViewController: UIViewController, TableModelHost {
         IssueReporter.shared.present(in: self, withAttachments: attach)
     }
     
+    private func requireDownload() {
+        guard let providerProfile = profile as? ProviderConnectionProfile else {
+            return
+        }
+        guard let downloadURL = AppConstants.URLs.externalResources[providerProfile.name] else {
+            return
+        }
+        
+        let alert = Macros.alert(
+            L10n.Service.Alerts.Download.title,
+            L10n.Service.Alerts.Download.message(providerProfile.name.rawValue)
+        )
+        alert.addCancelAction(L10n.Global.cancel)
+        alert.addDefaultAction(L10n.Global.ok) {
+            
+            // FIXME: start external download
+            print(downloadURL)
+        }
+        present(alert, animated: true, completion: nil)
+    }
+    
     // MARK: Notifications
     
     @objc private func vpnDidUpdate() {

Passepartout/Resources/en.lproj/Localizable.strings

@@ -132,6 +132,8 @@
 "service.alerts.data_count.messages.not_available" = "Information not available, are you connected?";
 "service.alerts.masks_private_data.messages.must_reconnect" = "In order to safely reset the current debug log and apply the new masking preference, you must reconnect to the VPN now.";
 "service.alerts.buttons.reconnect" = "Reconnect";
+"service.alerts.download.title" = "Download required";
+"service.alerts.download.message" = "%@ requires the download of additional configuration files.\n\nConfirm to start the download.";
 
 "account.sections.credentials.header" = "Credentials";
 "account.sections.guidance.footer.infrastructure.mullvad" = "Use your %@ website account number and password \"m\".";

Passepartout/Sources/AppConstants.swift

@@ -202,6 +202,8 @@ public class AppConstants {
             .tunnelBear: "https://click.tunnelbear.com/aff_c?offer_id=2&aff_id=7464",
             .windscribe: "https://secure.link/kCsD0prd"
         ]
+
+        public static let externalResources: [Infrastructure.Name: String] = [:]
     }
 
     public class Repos {

Passepartout/Sources/ApplicationError.swift

@@ -33,4 +33,6 @@ public enum ApplicationError: String, Error {
     case migration
 
     case inactiveProfile
+    
+    case externalResources
 }

Passepartout/Sources/Model/Profiles/ProviderConnectionProfile.swift

@@ -124,7 +124,7 @@ public class ProviderConnectionProfile: ConnectionProfile, Codable, Equatable {
         do {
             try preset.injectExternalConfiguration(&builder, with: name, pool: pool)
         } catch {
-            fatalError("Could not find external preset resources")
+            throw ApplicationError.externalResources
         }
 
         if let address = manualAddress {

Passepartout/Sources/SwiftGen+Strings.swift

@@ -593,6 +593,14 @@ public enum L10n {
           public static let notAvailable = L10n.tr("Localizable", "service.alerts.data_count.messages.not_available")
         }
       }
+      public enum Download {
+        /// %@ requires the download of additional configuration files.\n\nConfirm to start the download.
+        public static func message(_ p1: String) -> String {
+          return L10n.tr("Localizable", "service.alerts.download.message", p1)
+        }
+        /// Download required
+        public static let title = L10n.tr("Localizable", "service.alerts.download.title")
+      }
       public enum MasksPrivateData {
         public enum Messages {
           /// In order to safely reset the current debug log and apply the new masking preference, you must reconnect to the VPN now.

Passepartout/Sources/VPN/GracefulVPN.swift

@@ -75,6 +75,10 @@ public class GracefulVPN {
             log.info("Reconnecting...")
             try vpn.reconnect(configuration: service.vpnConfiguration(), completionHandler: completionHandler)
         } catch let e {
+            guard e as? ApplicationError != .externalResources else {
+                completionHandler?(e)
+                return
+            }
             log.error("Could not reconnect: \(e)")
         }
     }
@@ -89,6 +93,10 @@ public class GracefulVPN {
             log.info("Reinstalling...")
             try vpn.install(configuration: service.vpnConfiguration(), completionHandler: completionHandler)
         } catch let e {
+            guard e as? ApplicationError != .externalResources else {
+                completionHandler?(e)
+                return
+            }
             log.error("Could not reinstall: \(e)")
         }
     }