Calendar account management page basics.

Wino.Core.UWP/Services/DialogServiceBase.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
 using CommunityToolkit.Mvvm.Messaging;
@@ -11,6 +12,8 @@ using Windows.UI.Xaml.Controls;
 using Wino.Core.Domain;
 using Wino.Core.Domain.Enums;
 using Wino.Core.Domain.Interfaces;
+using Wino.Core.Domain.Models.Accounts;
+using Wino.Core.UWP.Dialogs;
 using Wino.Core.UWP.Extensions;
 using Wino.Dialogs;
 using Wino.Messaging.Client.Shell;
@@ -54,6 +57,14 @@ namespace Wino.Core.UWP.Services
             return file;
         }
 
+        public virtual IAccountCreationDialog GetAccountCreationDialog(MailProviderType type)
+        {
+            return new AccountCreationDialog
+            {
+                RequestedTheme = ThemeService.RootTheme.ToWindowsElementTheme()
+            };
+        }
+
         public async Task<byte[]> PickWindowsFileContentAsync(params object[] typeFilters)
         {
             var file = await PickFileAsync(typeFilters);
@@ -201,5 +212,18 @@ namespace Wino.Core.UWP.Services
 
             return dialogResult == ContentDialogResult.Primary;
         }
+
+        public async Task<AccountCreationDialogResult> ShowAccountProviderSelectionDialogAsync(List<IProviderDetail> availableProviders)
+        {
+            var dialog = new NewAccountDialog
+            {
+                Providers = availableProviders,
+                RequestedTheme = ThemeService.RootTheme.ToWindowsElementTheme()
+            };
+
+            await HandleDialogPresentationAsync(dialog);
+
+            return dialog.Result;
+        }
     }
 }

Wino.Core.UWP/Services/WinoServerConnectionManager.cs

@@ -288,6 +288,8 @@ namespace Wino.Core.UWP.Services
             if (Status != WinoServerConnectionStatus.Connected)
                 await ConnectAsync();
 
+            if (Connection == null) return WinoServerResponse<TResponse>.CreateErrorResponse("Server connection is not established.");
+
             string serializedMessage = string.Empty;
 
             try