Implemented displaying an error message if account couldn't be added and navigation back if adding account was successful

ui/BankingiOSApp/BankingiOSApp/Base.lproj/Localizable.strings

@@ -7,3 +7,6 @@
 "Bank code" = "Bank code";
 "Customer ID" = "Online banking login name";
 "Password" = "Online banking password";
+
+"Could not add account" = "Could not add account";
+"Error message from your bank %@" = "Error message from your bank:\n\n%@";

ui/BankingiOSApp/BankingiOSApp/de.lproj/Localizable.strings

@@ -7,3 +7,6 @@
 "Bank code" = "Bankleitzahl";
 "Customer ID" = "Onlinebanking Login Name";
 "Password" = "Online banking password";
+
+"Could not add account" = "Konto konnte nicht hinzugefügt werden.";
+"Error message from your bank %@" = "Fehlermeldung Ihrer Bank:\n\n%@";

ui/BankingiOSApp/BankingiOSApp/ui/Message.swift

@@ -0,0 +1,8 @@
+import Foundation
+
+
+struct Message: Identifiable {
+    let id = UUID()
+    
+    let text: String
+}

ui/BankingiOSApp/BankingiOSApp/ui/views/AddAccountDialog.swift

@@ -4,12 +4,16 @@ import BankingUiSwift
 
 struct AddAccountDialog: View {
     
+    @Environment(\.presentationMode) var presentation
+    
     @State private var enteredBank = ""
     @State private var customerId = ""
     @State private var password = ""
     
     @State private var bank: BankFinderBankInfo? = BankFinderBankInfo()
     
+    @State private var errorMessage: Message? = nil
+    
     
     @Inject private var presenter: BankingPresenterSwift
     
@@ -43,6 +47,9 @@ struct AddAccountDialog: View {
                 }
             }
         }
+        .alert(item: $errorMessage) { message in
+            Alert(title: Text("Could not add account"), message: Text("Error message from your bank \(message.text)"), dismissButton: Alert.Button.cancel())
+        }
         .navigationBarTitle(Text("Add account"), displayMode: NavigationBarItem.TitleDisplayMode.inline)
     }
     
@@ -58,14 +65,21 @@ struct AddAccountDialog: View {
     }
     
     func addAccount() {
-        
         if let bank = bank {
-
+            presenter.addAccountAsync(bankInfo: bank, customerId: customerId, pin: password) { (response) in
-            presenter.addAccountAsync(bankInfo: bank, customerId: customerId, pin: password) { (response: BUCAddAccountResponse) in
+                self.handleAddAccountResponse(response)
-                NSLog("Is successful? \(response.isSuccessful), name = \(response.customer.customerName), \(response.customer.accounts.count) accounts, \(response.bookedTransactionsOfLast90Days.flatMap( { $1 }).count) transactions")
             }
         }
     }
+    
+    func handleAddAccountResponse(_ response: BUCAddAccountResponse) {
+        if (response.isSuccessful) {
+            presentation.wrappedValue.dismiss()
+        }
+        else {
+            self.errorMessage = Message(text: (response.errorToShowToUser ?? ""))
+        }
+    }
 }