Added account deletion feature on settings (#1621)

* Added account deletion feature on settings

* Disabled using Microsoft.AppCenter.Crashes for FDroid

* Moved drawable on Android.csproj to be with the others

Co-authored-by: Federico Maccaroni <fmaccaroni@bitwarden.com>

src/Android/Android.csproj

@@ -172,6 +172,7 @@
     <AndroidResource Include="Resources\drawable\cog.xml" />
     <AndroidResource Include="Resources\drawable\icon.xml" />
     <AndroidResource Include="Resources\drawable\ic_launcher_foreground.xml" />
+    <AndroidResource Include="Resources\drawable\ic_warning.xml" />
     <AndroidResource Include="Resources\drawable\id.xml" />
     <AndroidResource Include="Resources\drawable\info.xml" />
     <AndroidResource Include="Resources\drawable\list_item_bg.xml" />

src/Android/Resources/drawable/ic_warning.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="22dp"
+    android:height="19dp"
+    android:viewportWidth="22"
+    android:viewportHeight="19">
+    <path
+        android:fillColor="#175DDC"
+        android:pathData="M19.16 18.71H2.64c-0.36 0-0.72-0.09-1.03-0.27c-0.31-0.2-0.57-0.46-0.74-0.78c-0.18-0.32-0.27-0.67-0.27-1.04c0-0.36 0.1-0.72 0.28-1.03L9.14 1.1C9.32 0.76 9.58 0.5 9.89 0.32c0.3-0.18 0.65-0.28 1-0.28c0.36 0 0.7 0.1 1.02 0.28c0.3 0.18 0.56 0.44 0.74 0.75l8.26 14.51c0.18 0.31 0.28 0.67 0.28 1.03c0 0.37-0.09 0.72-0.26 1.04c-0.18 0.32-0.44 0.59-0.75 0.78c-0.31 0.18-0.66 0.28-1.02 0.27zM10.9 1.38c-0.13 0-0.26 0.04-0.38 0.1c-0.11 0.07-0.2 0.16-0.27 0.28L1.99 16.27c-0.07 0.11-0.1 0.24-0.1 0.36C1.9 16.76 1.92 16.9 2 17c0.06 0.12 0.16 0.22 0.27 0.3c0.12 0.06 0.25 0.1 0.38 0.1h16.52c0.13 0 0.26-0.04 0.37-0.1c0.12-0.08 0.21-0.18 0.28-0.3c0.06-0.1 0.1-0.23 0.1-0.36c0-0.12-0.04-0.25-0.1-0.36l-8.26-14.5c-0.07-0.13-0.17-0.22-0.28-0.29c-0.11-0.06-0.24-0.1-0.37-0.1zm0 11.42c-0.17 0-0.34-0.07-0.46-0.2c-0.12-0.12-0.19-0.29-0.19-0.46v-6.1c0-0.18 0.07-0.35 0.2-0.47c0.11-0.13 0.28-0.2 0.45-0.2c0.17 0 0.33 0.07 0.45 0.2c0.12 0.12 0.19 0.3 0.19 0.47v6.1c0 0.17-0.07 0.34-0.19 0.47c-0.12 0.12-0.28 0.2-0.45 0.2zm0 3.3c0.42 0 0.76-0.36 0.76-0.8c0-0.43-0.34-0.78-0.76-0.78c-0.43 0-0.77 0.35-0.77 0.79c0 0.43 0.34 0.79 0.77 0.79z"/>
+</vector>

src/App/Abstractions/IPasswordRepromptService.cs

@@ -7,6 +7,8 @@ namespace Bit.App.Abstractions
         string[] ProtectedFields { get; }
 
         Task<bool> ShowPasswordPromptAsync();
+        
+        Task<(string password, bool valid)> ShowPasswordPromptAndGetItAsync();
 
         Task<bool> Enabled();
     }

src/App/Pages/Accounts/DeleteAccountPage.xaml

@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<pages:BaseContentPage
+    xmlns="http://xamarin.com/schemas/2014/forms"
+    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+    x:Class="Bit.App.Pages.Accounts.DeleteAccountPage"
+    xmlns:pages="clr-namespace:Bit.App.Pages"
+    xmlns:u="clr-namespace:Bit.App.Utilities"
+    x:DataType="pages:DeleteAccountViewModel"
+    Title="{Binding PageTitle}">
+    <ContentPage.BindingContext>
+        <pages:DeleteAccountViewModel />
+    </ContentPage.BindingContext>
+
+    <ContentPage.ToolbarItems>
+        <ToolbarItem Text="{u:I18n Close}" Clicked="Close_Clicked" Order="Primary" Priority="-1" />
+    </ContentPage.ToolbarItems>
+
+    <ContentPage.Content>
+        <StackLayout Padding="20, 30" Spacing="0">
+            <Image
+                Source="ic_warning"
+                WidthRequest="28"
+                HeightRequest="25"
+                HorizontalOptions="Start" />
+            <Label
+                Text="{u:I18n DeletingYourAccountIsPermanent}"
+                HorizontalOptions="Start"
+                StyleClass="text-body"
+                Margin="0,15,0,0"/>
+            <Label
+                Text="{u:I18n DeleteAccountExplanation}"
+                HorizontalOptions="Start"
+                Margin="0,6,50,0"
+                Opacity="0.6" />
+            <Button
+                Text="{u:I18n Cancel}"
+                StyleClass="btn-primary"
+                HorizontalOptions="Start"
+                Margin="0,26,0,0"
+                Padding="16,6"
+                CornerRadius="2"
+                TextTransform="Uppercase"
+                Clicked="Close_Clicked" />
+            <Button
+                Text="{u:I18n DeleteAccount}"
+                StyleClass="btn-secondary"
+                TextColor="#99000000"
+                HorizontalOptions="Start"
+                Margin="0,12,0,0"
+                Padding="16,6"
+                CornerRadius="2"
+                TextTransform="Uppercase"
+                Clicked="DeleteAccount_Clicked"/>
+        </StackLayout>
+    </ContentPage.Content>
+</pages:BaseContentPage>

src/App/Pages/Accounts/DeleteAccountPage.xaml.cs

@@ -0,0 +1,33 @@
+using System;
+using Xamarin.Forms;
+
+namespace Bit.App.Pages.Accounts
+{
+    public partial class DeleteAccountPage : BaseContentPage
+    {
+        DeleteAccountViewModel _vm;
+
+        public DeleteAccountPage()
+        {
+            InitializeComponent();
+            _vm = BindingContext as DeleteAccountViewModel;
+            _vm.Page = this;
+        }
+
+        private async void Close_Clicked(object sender, EventArgs e)
+        {
+            if (DoOnce())
+            {
+                await Navigation.PopModalAsync();
+            }
+        }
+
+        private async void DeleteAccount_Clicked(object sender, EventArgs e)
+        {
+            if (DoOnce())
+            {
+                await _vm.DeleteAccountAsync();
+            }
+        }
+    }
+}

src/App/Pages/Accounts/DeleteAccountViewModel.cs

@@ -0,0 +1,84 @@
+using System.Threading.Tasks;
+using Bit.App.Abstractions;
+using Bit.App.Resources;
+using Bit.Core.Abstractions;
+using Bit.Core.Exceptions;
+using Bit.Core.Utilities;
+#if !FDROID
+using Microsoft.AppCenter.Crashes;
+#endif
+
+namespace Bit.App.Pages
+{
+    public class DeleteAccountViewModel : BaseViewModel
+    {
+        readonly IApiService _apiService;
+        readonly IPasswordRepromptService _passwordRepromptService;
+        readonly IMessagingService _messagingService;
+        readonly ICryptoService _cryptoService;
+        readonly IPlatformUtilsService _platformUtilsService;
+        readonly IDeviceActionService _deviceActionService;
+
+        public DeleteAccountViewModel()
+        {
+            _apiService = ServiceContainer.Resolve<IApiService>("apiService");
+            _passwordRepromptService = ServiceContainer.Resolve<IPasswordRepromptService>("passwordRepromptService");
+            _messagingService = ServiceContainer.Resolve<IMessagingService>("messagingService");
+            _cryptoService = ServiceContainer.Resolve<ICryptoService>("cryptoService");
+            _platformUtilsService = ServiceContainer.Resolve<IPlatformUtilsService>("platformUtilsService");
+            _deviceActionService = ServiceContainer.Resolve<IDeviceActionService>("deviceActionService");
+
+            PageTitle = AppResources.DeleteAccount;
+        }
+
+        public async Task DeleteAccountAsync()
+        {
+            try
+            {
+                if (Xamarin.Essentials.Connectivity.NetworkAccess == Xamarin.Essentials.NetworkAccess.None)
+                {
+                    await _platformUtilsService.ShowDialogAsync(AppResources.InternetConnectionRequiredMessage,
+                        AppResources.InternetConnectionRequiredTitle, AppResources.Ok);
+                    return;
+                }
+
+                var (password, valid) = await _passwordRepromptService.ShowPasswordPromptAndGetItAsync();
+                if (!valid)
+                {
+                    return;
+                }
+
+                await _deviceActionService.ShowLoadingAsync(AppResources.DeletingYourAccount);
+
+                var masterPasswordHashKey = await _cryptoService.HashPasswordAsync(password, null);
+                await _apiService.DeleteAccountAsync(new Core.Models.Request.DeleteAccountRequest
+                {
+                    MasterPasswordHash = masterPasswordHashKey
+                });
+
+                await _deviceActionService.HideLoadingAsync();
+
+                _messagingService.Send("logout");
+
+                await _platformUtilsService.ShowDialogAsync(AppResources.YourAccountHasBeenPermanentlyDeleted);
+            }
+            catch (ApiException apiEx)
+            {
+                await _deviceActionService.HideLoadingAsync();
+
+                if (apiEx?.Error != null)
+                {
+                    await _platformUtilsService.ShowDialogAsync(apiEx.Error.GetSingleMessage(), AppResources.AnErrorHasOccurred);
+                }
+            }
+            catch (System.Exception ex)
+            {
+                await _deviceActionService.HideLoadingAsync();
+#if !FDROID
+                Crashes.TrackError(ex);
+#endif
+                await _platformUtilsService.ShowDialogAsync(AppResources.AnErrorHasOccurred);
+            }
+        }
+    }
+}

src/App/Pages/Settings/SettingsPage/SettingsPage.xaml.cs

@@ -1,10 +1,11 @@
 using System.ComponentModel;
-using Bit.App.Abstractions;
-using Bit.App.Resources;
-using Bit.Core.Utilities;
 using System.Linq;
 using System.Threading.Tasks;
+using Bit.App.Abstractions;
 using Bit.App.Controls;
+using Bit.App.Pages.Accounts;
+using Bit.App.Resources;
+using Bit.Core.Utilities;
 using Xamarin.Forms;
 
 namespace Bit.App.Pages
@@ -134,6 +135,10 @@ namespace Bit.App.Pages
             {
                 await _vm.LogOutAsync();
             }
+            else if (item.Name == AppResources.DeleteAccount)
+            {
+                await Navigation.PushModalAsync(new NavigationPage(new DeleteAccountPage()));
+            }
             else if (item.Name == AppResources.LockNow)
             {
                 await _vm.LockAsync();

src/App/Pages/Settings/SettingsPage/SettingsPageViewModel.cs

@@ -490,7 +490,8 @@ namespace Bit.App.Pages
                 new SettingsPageListItem { Name = AppResources.Options },
                 new SettingsPageListItem { Name = AppResources.About },
                 new SettingsPageListItem { Name = AppResources.HelpAndFeedback },
-                new SettingsPageListItem { Name = AppResources.RateTheApp }
+                new SettingsPageListItem { Name = AppResources.RateTheApp },
+                new SettingsPageListItem { Name = AppResources.DeleteAccount }
             };
             GroupedItems.ResetWithRange(new List<SettingsPageListGroup>
             {

src/App/Resources/AppResources.Designer.cs

@@ -3719,6 +3719,36 @@ namespace Bit.App.Resources {
             }
         }
         
+        public static string DeleteAccount {
+            get {
+                return ResourceManager.GetString("DeleteAccount", resourceCulture);
+            }
+        }
+        
+        public static string DeletingYourAccountIsPermanent {
+            get {
+                return ResourceManager.GetString("DeletingYourAccountIsPermanent", resourceCulture);
+            }
+        }
+        
+        public static string DeleteAccountExplanation {
+            get {
+                return ResourceManager.GetString("DeleteAccountExplanation", resourceCulture);
+            }
+        }
+        
+        public static string DeletingYourAccount {
+            get {
+                return ResourceManager.GetString("DeletingYourAccount", resourceCulture);
+            }
+        }
+        
+        public static string YourAccountHasBeenPermanentlyDeleted {
+            get {
+                return ResourceManager.GetString("YourAccountHasBeenPermanentlyDeleted", resourceCulture);
+            }
+        }
+        
         public static string InvalidVerificationCode {
             get {
                 return ResourceManager.GetString("InvalidVerificationCode", resourceCulture);

src/App/Resources/AppResources.resx

@@ -2093,6 +2093,21 @@
   <data name="DisablePersonalVaultExportPolicyInEffect">
     <value>One or more organization policies prevents your from exporting your personal vault.</value>
   </data>
+  <data name="DeleteAccount" xml:space="preserve">
+    <value>Delete Account</value>
+  </data>
+  <data name="DeletingYourAccountIsPermanent" xml:space="preserve">
+    <value>Deleting your account is permanent</value>
+  </data>
+  <data name="DeleteAccountExplanation" xml:space="preserve">
+    <value>Your account and all associated data will be erased and unrecoverable. Are you sure you want to continue?</value>
+  </data>
+  <data name="DeletingYourAccount" xml:space="preserve">
+    <value>Deleting your account</value>
+  </data>
+  <data name="YourAccountHasBeenPermanentlyDeleted" xml:space="preserve">
+    <value>Your account has been permanently deleted</value>
+  </data>
   <data name="InvalidVerificationCode" xml:space="preserve">
     <value>Invalid Verification Code.</value>
   </data>

src/App/Services/MobilePasswordRepromptService.cs

@@ -1,7 +1,7 @@
 using System.Threading.Tasks;
-using Bit.Core.Abstractions;
 using Bit.App.Abstractions;
 using Bit.App.Resources;
+using Bit.Core.Abstractions;
 using System;
 using Bit.Core.Utilities;
 
@@ -22,23 +22,23 @@ namespace Bit.App.Services
 
         public async Task<bool> ShowPasswordPromptAsync()
         {
-            if (!await Enabled())
+            return await _platformUtilsService.ShowPasswordDialogAsync(AppResources.PasswordConfirmation, AppResources.PasswordConfirmationDesc, ValidatePasswordAsync);
-            {
+        }
-                return true;
-            }
 
-            Func<string, Task<bool>> validator = async (string password) =>
+        public async Task<(string password, bool valid)> ShowPasswordPromptAndGetItAsync()
-            {
+        {
-                // Assume user has canceled.
+            return await _platformUtilsService.ShowPasswordDialogAndGetItAsync(AppResources.PasswordConfirmation, AppResources.PasswordConfirmationDesc, ValidatePasswordAsync);
-                if (string.IsNullOrWhiteSpace(password))
+        }
-                {
-                    return false;
-                };
 
-                return await _cryptoService.CompareAndUpdateKeyHashAsync(password, null);
+        private async Task<bool> ValidatePasswordAsync(string password)
+        {
+            // Assume user has canceled.
+            if (string.IsNullOrWhiteSpace(password))
+            {
+                return false;
             };
 
-            return await _platformUtilsService.ShowPasswordDialogAsync(AppResources.PasswordConfirmation, AppResources.PasswordConfirmationDesc, validator);
+            return await _cryptoService.CompareAndUpdateKeyHashAsync(password, null);
         }
 
         public async Task<bool> Enabled()

src/App/Services/MobilePlatformUtilsService.cs

@@ -167,13 +167,18 @@ namespace Bit.App.Services
         }
 
         public async Task<bool> ShowPasswordDialogAsync(string title, string body, Func<string, Task<bool>> validator)
+        {
+            return (await ShowPasswordDialogAndGetItAsync(title, body, validator)).valid;
+        }
+
+        public async Task<(string password, bool valid)> ShowPasswordDialogAndGetItAsync(string title, string body, Func<string, Task<bool>> validator)
         {
             var password = await _deviceActionService.DisplayPromptAync(AppResources.PasswordConfirmation,
                 AppResources.PasswordConfirmationDesc, null, AppResources.Submit, AppResources.Cancel, password: true);
 
             if (password == null)
             {
-                return false;
+                return (password, false);
             }
 
             var valid = await validator(password);
@@ -183,7 +188,7 @@ namespace Bit.App.Services
                 await ShowDialogAsync(AppResources.InvalidMasterPassword, null, AppResources.Ok);
             }
 
-            return valid;
+            return (password, valid);
         }
 
         public bool IsDev()

src/App/Styles/Android.xaml

@@ -151,6 +151,39 @@
             </VisualStateGroupList>
         </Setter>
     </Style>
+    
+    <Style TargetType="Button"
+           Class="btn-secondary">
+        <Setter Property="BackgroundColor"
+                Value="Transparent" />
+        <Setter Property="BorderColor"
+                Value="{DynamicResource ButtonBorderColor}" />
+        <Setter Property="BorderWidth" 
+                Value="1" />
+        <Setter Property="TextColor"
+                Value="{DynamicResource ButtonTextColor}" />
+        <Setter Property="FontSize"
+                Value="Medium" />
+        <Setter Property="CornerRadius"
+                Value="5" />
+        <Setter Property="VisualStateManager.VisualStateGroups">
+            <VisualStateGroupList>
+                <VisualStateGroup x:Name="CommonStates">
+                    <VisualState x:Name="Normal" />
+                    <VisualState x:Name="Disabled">
+                        <VisualState.Setters>
+                            <Setter Property="TextColor"
+                                    Value="{DynamicResource ButtonTextColorDisabled}" />
+                            <Setter Property="BackgroundColor"
+                                    Value="{DynamicResource ButtonBackgroundColorDisabled}" />
+                            <Setter Property="BorderColor"
+                                    Value="{DynamicResource ButtonBackgroundColorDisabled}" />
+                        </VisualState.Setters>
+                    </VisualState>
+                </VisualStateGroup>
+            </VisualStateGroupList>
+        </Setter>
+    </Style>
     <Style TargetType="Button"
            ApplyToDerivedTypes="True"
            Class="btn-icon-platform">

src/App/Styles/Base.xaml

@@ -67,6 +67,13 @@
         <Setter Property="TextType"
                 Value="Html" />
     </Style>
+    <Style TargetType="Label"
+           Class="text-body">
+        <Setter Property="FontSize"
+                Value="Body" />
+        <Setter Property="TextColor"
+                Value="{DynamicResource TextColor}" />
+    </Style>
 
     <!-- Pages -->
     <Style TargetType="TabbedPage"

src/App/Styles/iOS.xaml

@@ -172,6 +172,44 @@
             </VisualStateGroupList>
         </Setter>
     </Style>
+    <Style TargetType="Button"
+           Class="btn-secondary">
+        <Setter Property="BackgroundColor"
+                Value="Transparent" />
+        <Setter Property="BorderColor"
+                Value="{DynamicResource ButtonBorderColor}" />
+        <Setter Property="BorderWidth" 
+                Value="1" />
+        <Setter Property="TextColor"
+                Value="{DynamicResource ButtonTextColor}" />
+        <Setter Property="FontSize"
+                Value="Medium" />
+        <Setter Property="CornerRadius"
+                Value="5" />
+        <Setter Property="VisualStateManager.VisualStateGroups">
+            <VisualStateGroupList>
+                <VisualStateGroup x:Name="CommonStates">
+                    <VisualState x:Name="Normal" />
+                    <VisualState x:Name="Pressed">
+                        <VisualState.Setters>
+                            <Setter Property="BackgroundColor" 
+                                    Value="{DynamicResource ButtonBackgroundColorPressed}" />
+                        </VisualState.Setters>
+                    </VisualState>
+                    <VisualState x:Name="Disabled">
+                        <VisualState.Setters>
+                            <Setter Property="TextColor"
+                                    Value="{DynamicResource ButtonTextColorDisabled}" />
+                            <Setter Property="BackgroundColor"
+                                    Value="{DynamicResource ButtonBackgroundColorDisabled}" />
+                            <Setter Property="BorderColor"
+                                    Value="{DynamicResource ButtonBackgroundColorDisabled}" />
+                        </VisualState.Setters>
+                    </VisualState>
+                </VisualStateGroup>
+            </VisualStateGroupList>
+        </Setter>
+    </Style>
     <Style TargetType="Button"
            ApplyToDerivedTypes="True"
            Class="btn-icon-platform">

src/Core/Abstractions/IApiService.cs

@@ -61,6 +61,7 @@ namespace Bit.Core.Abstractions
         Task PutDeviceTokenAsync(string identifier, DeviceTokenRequest request);
         Task PostEventsCollectAsync(IEnumerable<EventRequest> request);
         Task PutUpdateTempPasswordAsync(UpdateTempPasswordRequest request);
+        Task DeleteAccountAsync(DeleteAccountRequest request);
         Task<OrganizationKeysResponse> GetOrganizationKeysAsync(string id);
         Task<OrganizationAutoEnrollStatusResponse> GetOrganizationAutoEnrollStatusAsync(string identifier);
         Task PutOrganizationUserResetPasswordEnrollmentAsync(string orgId, string userId,

src/Core/Abstractions/IPlatformUtilsService.cs

@@ -22,6 +22,7 @@ namespace Bit.Core.Abstractions
         Task<bool> ShowDialogAsync(string text, string title = null, string confirmText = null,
             string cancelText = null, string type = null);
         Task<bool> ShowPasswordDialogAsync(string title, string body, Func<string, Task<bool>> validator);
+        Task<(string password, bool valid)> ShowPasswordDialogAndGetItAsync(string title, string body, Func<string, Task<bool>> validator);
         void ShowToast(string type, string title, string text, Dictionary<string, object> options = null);
         void ShowToast(string type, string title, string[] text, Dictionary<string, object> options = null);
         bool SupportsFido2();

src/Core/Models/Request/DeleteAccountRequest.cs

@@ -0,0 +1,7 @@
+namespace Bit.Core.Models.Request
+{
+    public class DeleteAccountRequest
+    {
+        public string MasterPasswordHash { get; set; }
+    }
+}

src/Core/Services/ApiService.cs

@@ -195,6 +195,11 @@ namespace Bit.Core.Services
                 request, true, false);
         }
 
+        public Task DeleteAccountAsync(DeleteAccountRequest request)
+        {
+            return SendAsync<DeleteAccountRequest, object>(HttpMethod.Delete, "/accounts", request, true, false);
+        }
+        
         public Task PostConvertToKeyConnector()
         {
             return SendAsync<object, object>(HttpMethod.Post, "/accounts/convert-to-key-connector", null, true, false);

src/iOS/Resources/Assets.xcassets/ic_warning.imageset/Contents.json

@@ -0,0 +1,528 @@
+{
+  "images": [
+    {
+      "filename": "ic_warning.pdf",
+      "idiom": "universal"
+    },
+    {
+      "scale": "1x",
+      "idiom": "universal"
+    },
+    {
+      "scale": "2x",
+      "idiom": "universal"
+    },
+    {
+      "scale": "3x",
+      "idiom": "universal"
+    },
+    {
+      "idiom": "iphone"
+    },
+    {
+      "scale": "1x",
+      "idiom": "iphone"
+    },
+    {
+      "scale": "2x",
+      "idiom": "iphone"
+    },
+    {
+      "subtype": "retina4",
+      "scale": "2x",
+      "idiom": "iphone"
+    },
+    {
+      "scale": "3x",
+      "idiom": "iphone"
+    },
+    {
+      "idiom": "ipad"
+    },
+    {
+      "scale": "1x",
+      "idiom": "ipad"
+    },
+    {
+      "scale": "2x",
+      "idiom": "ipad"
+    },
+    {
+      "idiom": "watch"
+    },
+    {
+      "scale": "2x",
+      "idiom": "watch"
+    },
+    {
+      "screenWidth": "{130,145}",
+      "scale": "2x",
+      "idiom": "watch"
+    },
+    {
+      "screenWidth": "{146,165}",
+      "scale": "2x",
+      "idiom": "watch"
+    },
+    {
+      "idiom": "mac"
+    },
+    {
+      "scale": "1x",
+      "idiom": "mac"
+    },
+    {
+      "scale": "2x",
+      "idiom": "mac"
+    },
+    {
+      "idiom": "car"
+    },
+    {
+      "scale": "2x",
+      "idiom": "car"
+    },
+    {
+      "scale": "3x",
+      "idiom": "car"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "idiom": "universal"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "1x",
+      "idiom": "universal"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "universal"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "3x",
+      "idiom": "universal"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "idiom": "iphone"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "1x",
+      "idiom": "iphone"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "iphone"
+    },
+    {
+      "subtype": "retina4",
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "iphone"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "3x",
+      "idiom": "iphone"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "idiom": "ipad"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "1x",
+      "idiom": "ipad"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "ipad"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "idiom": "watch"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "watch"
+    },
+    {
+      "screenWidth": "{130,145}",
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "watch"
+    },
+    {
+      "screenWidth": "{146,165}",
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "watch"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "idiom": "mac"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "1x",
+      "idiom": "mac"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "mac"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "idiom": "car"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "car"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "scale": "3x",
+      "idiom": "car"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "idiom": "universal"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "1x",
+      "idiom": "universal"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "universal"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "3x",
+      "idiom": "universal"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "idiom": "iphone"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "1x",
+      "idiom": "iphone"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "iphone"
+    },
+    {
+      "subtype": "retina4",
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "iphone"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "3x",
+      "idiom": "iphone"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "idiom": "ipad"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "1x",
+      "idiom": "ipad"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "ipad"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "idiom": "watch"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "watch"
+    },
+    {
+      "screenWidth": "{130,145}",
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "watch"
+    },
+    {
+      "screenWidth": "{146,165}",
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "watch"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "idiom": "mac"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "1x",
+      "idiom": "mac"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "mac"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "idiom": "car"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "2x",
+      "idiom": "car"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "light"
+        }
+      ],
+      "scale": "3x",
+      "idiom": "car"
+    }
+  ],
+  "info": {
+    "version": 1,
+    "author": "xcode"
+  }
+}

src/iOS/iOS.csproj

@@ -151,6 +151,8 @@
     <ImageAsset Include="Resources\Assets.xcassets\LaunchScreen.imageset\logo_white.png" />
     <ImageAsset Include="Resources\Assets.xcassets\LaunchScreen.imageset\logo_white%402x.png" />
     <ImageAsset Include="Resources\Assets.xcassets\LaunchScreen.imageset\logo_white%403x.png" />
+    <ImageAsset Include="Resources\Assets.xcassets\ic_warning.imageset\Contents.json" />
+    <ImageAsset Include="Resources\Assets.xcassets\ic_warning.imageset\ic_warning.pdf" />
   </ItemGroup>
   <ItemGroup>
     <InterfaceDefinition Include="LaunchScreen.storyboard" />
@@ -415,5 +417,6 @@
   </ItemGroup>
   <ItemGroup>
     <Folder Include="Resources\Assets.xcassets\LaunchScreen.imageset\" />
+    <Folder Include="Resources\Assets.xcassets\ic_warning.imageset\" />
   </ItemGroup>
 </Project>