Introduced IUnsubscriptionService and replaced the usage in rendering page view model.

Wino.Core.Domain/Interfaces/IUnsubscriptionService.cs

@@ -0,0 +1,15 @@
+using System.Threading.Tasks;
+using Wino.Core.Domain.Models.Reader;
+
+namespace Wino.Core.Domain.Interfaces
+{
+    public interface IUnsubscriptionService
+    {
+        /// <summary>
+        /// Unsubscribes from the subscription using one-click method.
+        /// </summary>
+        /// <param name="info">Unsubscribtion information.</param>
+        /// <returns>Whether the unsubscription is succeeded or not.</returns>
+        Task<bool> OneClickUnsubscribeAsync(UnsubscribeInfo info);
+    }
+}

Wino.Core/CoreContainerSetup.cs

@@ -37,6 +37,7 @@ namespace Wino.Core
             services.AddTransient<IAutoDiscoveryService, AutoDiscoveryService>();
             services.AddTransient<IContextMenuItemService, ContextMenuItemService>();
             services.AddTransient<IFontService, FontService>();
+            services.AddTransient<IUnsubscriptionService, UnsubscriptionService>();
 
             services.AddTransient<OutlookThreadingStrategy>();
             services.AddTransient<GmailThreadingStrategy>();

Wino.Core/Services/UnsubscriptionService.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Net.Http;
+using System.Text;
+using System.Threading.Tasks;
+using Serilog;
+using Wino.Core.Domain.Interfaces;
+using Wino.Core.Domain.Models.Reader;
+
+namespace Wino.Core.Services
+{
+    public class UnsubscriptionService : IUnsubscriptionService
+    {
+        public async Task<bool> OneClickUnsubscribeAsync(UnsubscribeInfo info)
+        {
+            try
+            {
+                using var httpClient = new HttpClient();
+
+                var unsubscribeRequest = new HttpRequestMessage(HttpMethod.Post, info.HttpLink)
+                {
+                    Content = new StringContent("List-Unsubscribe=One-Click", Encoding.UTF8, "application/x-www-form-urlencoded")
+                };
+
+                var result = await httpClient.SendAsync(unsubscribeRequest).ConfigureAwait(false);
+
+                return result.IsSuccessStatusCode;
+            }
+            catch (Exception ex)
+            {
+                Log.Error("Failed to unsubscribe from {HttpLink} - {Message}", info.HttpLink, ex.Message);
+            }
+
+            return false;
+        }
+    }
+}

Wino.Mail.ViewModels/MailRenderingPageViewModel.cs

@@ -2,8 +2,6 @@
 using System.Collections.ObjectModel;
 using System.IO;
 using System.Linq;
-using System.Net.Http;
-using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using CommunityToolkit.Mvvm.ComponentModel;
@@ -40,6 +38,7 @@ namespace Wino.Mail.ViewModels
         private readonly IWinoSynchronizerFactory _winoSynchronizerFactory;
         private readonly IWinoRequestDelegator _requestDelegator;
         private readonly IClipboardService _clipboardService;
+        private readonly IUnsubscriptionService _unsubscriptionService;
 
         private bool forceImageLoading = false;
 
@@ -127,6 +126,7 @@ namespace Wino.Mail.ViewModels
                                           IWinoRequestDelegator requestDelegator,
                                           IStatePersistanceService statePersistanceService,
                                           IClipboardService clipboardService,
+                                          IUnsubscriptionService unsubscriptionService,
                                           IPreferencesService preferencesService) : base(dialogService)
         {
             NativeAppService = nativeAppService;
@@ -134,6 +134,7 @@ namespace Wino.Mail.ViewModels
             PreferencesService = preferencesService;
 
             _clipboardService = clipboardService;
+            _unsubscriptionService = unsubscriptionService;
             _underlyingThemeService = underlyingThemeService;
             _mimeFileService = mimeFileService;
             _mailService = mailService;
@@ -194,15 +195,9 @@ namespace Wino.Mail.ViewModels
                     confirmed = await DialogService.ShowConfirmationDialogAsync(string.Format(Translator.DialogMessage_UnsubscribeConfirmationOneClickMessage, FromName), Translator.DialogMessage_UnsubscribeConfirmationTitle, Translator.Unsubscribe);
                     if (!confirmed) return;
 
-                    using var httpClient = new HttpClient();
+                    bool isOneClickUnsubscribed = await _unsubscriptionService.OneClickUnsubscribeAsync(CurrentRenderModel.UnsubscribeInfo);
 
-                    var unsubscribeRequest = new HttpRequestMessage(HttpMethod.Post, CurrentRenderModel.UnsubscribeInfo.HttpLink)
+                    if (isOneClickUnsubscribed)
-                    {
-                        Content = new StringContent("List-Unsubscribe=One-Click", Encoding.UTF8, "application/x-www-form-urlencoded")
-                    };
-
-                    var result = await httpClient.SendAsync(unsubscribeRequest);
-                    if (result.IsSuccessStatusCode)
                     {
                         DialogService.InfoBarMessage(Translator.Unsubscribe, string.Format(Translator.Info_UnsubscribeSuccessMessage, FromName), InfoBarMessageType.Success);
                     }