Implemented disabling 'Add account' and 'Transfer money' button and added an activity indicator during action to show that in background work is being done and to avoid that user hits button twice

ui/BankingiOSApp/BankingiOSApp.xcodeproj/project.pbxproj

@@ -20,6 +20,7 @@
 		3608D6C224FBA9C6006C93A8 /* TrianglePointingDown.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3608D6C124FBA9C6006C93A8 /* TrianglePointingDown.swift */; };
 		3608D6C624FBAB41006C93A8 /* TanGeneratorPositionMarker.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3608D6C524FBAB41006C93A8 /* TanGeneratorPositionMarker.swift */; };
 		3642F00A2500F5AE005186FE /* Divider.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3642F0092500F5AE005186FE /* Divider.swift */; };
+		3642F00C25010021005186FE /* UIKitActivityIndicator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3642F00B25010021005186FE /* UIKitActivityIndicator.swift */; };
 		366744E224FC4E96002B235A /* SectionWithRightAlignedEditButton.swift in Sources */ = {isa = PBXBuildFile; fileRef = 366744E124FC4E96002B235A /* SectionWithRightAlignedEditButton.swift */; };
 		366FA4DA24C472A90094F009 /* Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 366FA4D924C472A90094F009 /* Extensions.swift */; };
 		366FA4DC24C479120094F009 /* BankInfoListItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = 366FA4DB24C479120094F009 /* BankInfoListItem.swift */; };
@@ -152,6 +153,7 @@
 		3608D6C124FBA9C6006C93A8 /* TrianglePointingDown.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TrianglePointingDown.swift; sourceTree = "<group>"; };
 		3608D6C524FBAB41006C93A8 /* TanGeneratorPositionMarker.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TanGeneratorPositionMarker.swift; sourceTree = "<group>"; };
 		3642F0092500F5AE005186FE /* Divider.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Divider.swift; sourceTree = "<group>"; };
+		3642F00B25010021005186FE /* UIKitActivityIndicator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UIKitActivityIndicator.swift; sourceTree = "<group>"; };
 		366744E124FC4E96002B235A /* SectionWithRightAlignedEditButton.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SectionWithRightAlignedEditButton.swift; sourceTree = "<group>"; };
 		366FA4D924C472A90094F009 /* Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Extensions.swift; sourceTree = "<group>"; };
 		366FA4DB24C479120094F009 /* BankInfoListItem.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BankInfoListItem.swift; sourceTree = "<group>"; };
@@ -474,6 +476,7 @@
 				3608D6C524FBAB41006C93A8 /* TanGeneratorPositionMarker.swift */,
 				366744E124FC4E96002B235A /* SectionWithRightAlignedEditButton.swift */,
 				3642F0092500F5AE005186FE /* Divider.swift */,
+				3642F00B25010021005186FE /* UIKitActivityIndicator.swift */,
 			);
 			path = views;
 			sourceTree = "<group>";
@@ -646,6 +649,7 @@
 				36BE064F24C9A17F00CBBB68 /* ImageTanView.swift in Sources */,
 				36E21EDB24DC990300649DC8 /* LabelledUIKitTextField.swift in Sources */,
 				36BE068D24CE41E700CBBB68 /* Styles.swift in Sources */,
+				3642F00C25010021005186FE /* UIKitActivityIndicator.swift in Sources */,
 				36E21ECB24D88DF000649DC8 /* UIKitExtensions.swift in Sources */,
 				360782C524E541970098FEFE /* ScaleImageView.swift in Sources */,
 				366744E224FC4E96002B235A /* SectionWithRightAlignedEditButton.swift in Sources */,

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

@@ -13,6 +13,8 @@ struct AddAccountDialog: View {
     @State private var password = ""
 
     
+    @State private var isTryingToAddAccount = false
+    
     @State private var errorMessage: Message? = nil
     
     
@@ -48,11 +50,13 @@ struct AddAccountDialog: View {
             Section {
                 HStack {
                     Spacer()
-                    Button(action: { self.addAccount() },
+                    
-                           label: { Text("Add") })
+                    Button("Add") { self.addAccount() }
-                        .disabled(!self.isRequiredDataEntered())
+                        .disabled( !self.isRequiredDataEntered() || isTryingToAddAccount)
+                    
                     Spacer()
                 }
+                .overlay(UIKitActivityIndicator($isTryingToAddAccount), alignment: .leading)
             }
             
         }
@@ -65,7 +69,7 @@ struct AddAccountDialog: View {
     
 
     func handleReturnKeyPress() -> Bool {
-        if self.isRequiredDataEntered() {
+        if self.isRequiredDataEntered() && isTryingToAddAccount == false {
             self.addAccount()
             
             return true
@@ -82,6 +86,8 @@ struct AddAccountDialog: View {
     
     func addAccount() {
         if let bank = bank {
+            isTryingToAddAccount = true
+            
             presenter.addAccountAsync(bankInfo: bank, customerId: customerId, pin: password) { (response) in
                 self.handleAddAccountResponse(response)
             }
@@ -89,6 +95,8 @@ struct AddAccountDialog: View {
     }
     
     func handleAddAccountResponse(_ response: AddAccountResponse) {
+        isTryingToAddAccount = false
+        
         if (response.isSuccessful) {
             DispatchQueue.main.async { // dispatch async as may EnterTanDialog is still displayed so dismiss() won't dismiss this view
                 self.presentation.wrappedValue.dismiss()

ui/BankingiOSApp/BankingiOSApp/ui/views/TransferMoneyDialog.swift

@@ -43,6 +43,8 @@ struct TransferMoneyDialog: View {
     
     @State private var instantPayment = false
     
+    @State private var isTransferringMoney = false
+    
     @State private var transferMoneyResponseMessage: Message? = nil
     
     private let inputValidator = InputValidator()
@@ -165,11 +167,13 @@ struct TransferMoneyDialog: View {
             Section {
                 HStack {
                     Spacer()
-                    Button(action: { self.transferMoney() },
+                    
-                           label: { Text("Transfer Money") })
+                    Button("Transfer Money") { self.transferMoney() }
-                        .disabled( !self.isRequiredDataEntered())
+                        .disabled( !self.isRequiredDataEntered() || isTransferringMoney)
+                    
                     Spacer()
                 }
+                .overlay(UIKitActivityIndicator($isTransferringMoney), alignment: .leading)
             }
         }
         .onAppear {
@@ -197,7 +201,7 @@ struct TransferMoneyDialog: View {
     
     
     private func handleReturnKeyPress() -> Bool {
-        if self.isRequiredDataEntered() {
+        if self.isRequiredDataEntered() && isTransferringMoney == false {
             self.transferMoney()
             
             return true
@@ -371,6 +375,8 @@ struct TransferMoneyDialog: View {
     
     private func transferMoney() {
         if let amount = inputValidator.convertAmountString(enteredAmountString: self.amount) {
+            isTransferringMoney = true
+            
             let data = TransferMoneyData(account: account!, creditorName: remitteeName, creditorIban: remitteeIban, creditorBic: remitteeBic, amount: amount, usage: usage, instantPayment: instantPayment)
             
             presenter.transferMoneyAsync(data: data) { response in
@@ -380,6 +386,8 @@ struct TransferMoneyDialog: View {
     }
     
     private func handleTransferMoneyResponse(_ data: TransferMoneyData, _ response: BankingClientResponse) {
+        isTransferringMoney = false
+        
         if (response.isSuccessful) {
             self.transferMoneyResponseMessage = Message(message: Text("Successfully transferred \(data.amount) \("€") to \(data.creditorName)"), primaryButton: .ok {
                 self.presentation.wrappedValue.dismiss()

ui/BankingiOSApp/BankingiOSApp/ui/views/UIKitActivityIndicator.swift

@@ -0,0 +1,40 @@
+import SwiftUI
+import UIKit
+
+
+struct UIKitActivityIndicator: UIViewRepresentable {
+    
+    private let style: UIActivityIndicatorView.Style
+
+    @Binding private var isAnimating: Bool
+    
+    
+    init(_ isAnimating: Binding<Bool> = .constant(true), _ style: UIActivityIndicatorView.Style = .medium) {
+        _isAnimating = isAnimating
+        
+        self.style = style
+    }
+    
+
+    func makeUIView(context: UIViewRepresentableContext<UIKitActivityIndicator>) -> UIActivityIndicatorView {
+        let indicatorView = UIActivityIndicatorView(style: style)
+        
+        indicatorView.hidesWhenStopped = true
+        
+        return indicatorView
+    }
+
+    func updateUIView(_ uiView: UIActivityIndicatorView, context: UIViewRepresentableContext<UIKitActivityIndicator>) {
+        isAnimating ? uiView.startAnimating() : uiView.stopAnimating()
+    }
+    
+}
+
+
+struct UIKitActivityIndicator_Previews: PreviewProvider {
+
+    static var previews: some View {
+        UIKitActivityIndicator()
+    }
+
+}