Initial plan

Wino.Core.Domain/CalendarReminderSnoozeOptions.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Wino.Core.Domain;
+
+public static class CalendarReminderSnoozeOptions
+{
+    private static readonly int[] SupportedSnoozeMinutes = [5, 10, 15, 30];
+
+    public static IReadOnlyList<int> GetAllowedSnoozeMinutes(long reminderDurationInSeconds, long defaultReminderDurationInSeconds)
+    {
+        var reminderMinutes = (int)Math.Max(0, reminderDurationInSeconds / 60);
+
+        if (reminderMinutes <= 0)
+            return [];
+
+        var maxSnoozeMinutes = reminderMinutes;
+        var defaultReminderMinutes = (int)Math.Max(0, defaultReminderDurationInSeconds / 60);
+
+        if (defaultReminderMinutes > 0)
+            maxSnoozeMinutes = Math.Min(maxSnoozeMinutes, defaultReminderMinutes);
+
+        return SupportedSnoozeMinutes.Where(minutes => minutes <= maxSnoozeMinutes).ToArray();
+    }
+}

Wino.Core.Domain/Constants.cs

@@ -16,6 +16,8 @@ public static class Constants
     public const string ToastCalendarItemIdKey = nameof(ToastCalendarItemIdKey);
     public const string ToastCalendarActionKey = nameof(ToastCalendarActionKey);
     public const string ToastCalendarNavigateAction = nameof(ToastCalendarNavigateAction);
+    public const string ToastCalendarSnoozeAction = nameof(ToastCalendarSnoozeAction);
+    public const string ToastCalendarSnoozeDurationInputId = nameof(ToastCalendarSnoozeDurationInputId);
     public const string ToastModeKey = nameof(ToastModeKey);
     public const string ToastModeMail = nameof(ToastModeMail);
     public const string ToastModeCalendar = nameof(ToastModeCalendar);

Wino.Core.Domain/Entities/Calendar/CalendarItem.cs

@@ -138,6 +138,7 @@ public class CalendarItem : ICalendarItem
     // TODO
     public string CustomEventColorHex { get; set; }
     public string HtmlLink { get; set; }
+    public DateTime? SnoozedUntil { get; set; }
     public CalendarItemStatus Status { get; set; }
     public CalendarItemVisibility Visibility { get; set; }
 

Wino.Core.Domain/Interfaces/ICalendarService.cs

@@ -42,6 +42,7 @@ public interface ICalendarService
     Task UpdateCalendarItemAsync(CalendarItem calendarItem, List<CalendarEventAttendee> attendees);
     Task<List<Reminder>> GetRemindersAsync(Guid calendarItemId);
     Task SaveRemindersAsync(Guid calendarItemId, List<Reminder> reminders);
+    Task SnoozeCalendarItemAsync(Guid calendarItemId, DateTime snoozedUntilLocal);
 
     /// <summary>
     /// Checks due reminder windows and returns reminder notifications that should trigger now.

Wino.Core.Domain/Translations/en_US/resources.json

@@ -133,6 +133,7 @@
     "CalendarEventDetails_People": "People",
     "CalendarEventDetails_ReadOnlyEvent": "Read-only event",
     "CalendarEventDetails_Reminder": "Reminder",
+    "CalendarReminder_SnoozeMinutesOption": "{0} minutes",
     "CalendarEventDetails_ShowAs": "Show as",
     "CalendarShowAs_Free": "Free",
     "CalendarShowAs_Tentative": "Tentative",

Wino.Core.Tests/CalendarReminderSnoozeOptionsTests.cs

@@ -0,0 +1,48 @@
+using FluentAssertions;
+using Wino.Core.Domain;
+using Xunit;
+
+namespace Wino.Core.Tests;
+
+public class CalendarReminderSnoozeOptionsTests
+{
+    [Fact]
+    public void GetAllowedSnoozeMinutes_WhenDefaultIs15AndReminderIs15_Excludes30()
+    {
+        var options = CalendarReminderSnoozeOptions.GetAllowedSnoozeMinutes(
+            reminderDurationInSeconds: 15 * 60,
+            defaultReminderDurationInSeconds: 15 * 60);
+
+        options.Should().Equal(5, 10, 15);
+    }
+
+    [Fact]
+    public void GetAllowedSnoozeMinutes_WhenReminderIs5AndDefaultIs15_DoesNotPassEventStart()
+    {
+        var options = CalendarReminderSnoozeOptions.GetAllowedSnoozeMinutes(
+            reminderDurationInSeconds: 5 * 60,
+            defaultReminderDurationInSeconds: 15 * 60);
+
+        options.Should().Equal(5);
+    }
+
+    [Fact]
+    public void GetAllowedSnoozeMinutes_WhenDefaultReminderIsNone_UsesReminderDurationOnly()
+    {
+        var options = CalendarReminderSnoozeOptions.GetAllowedSnoozeMinutes(
+            reminderDurationInSeconds: 30 * 60,
+            defaultReminderDurationInSeconds: 0);
+
+        options.Should().Equal(5, 10, 15, 30);
+    }
+
+    [Fact]
+    public void GetAllowedSnoozeMinutes_WhenReminderIsUnderFiveMinutes_ReturnsNoOptions()
+    {
+        var options = CalendarReminderSnoozeOptions.GetAllowedSnoozeMinutes(
+            reminderDurationInSeconds: 60,
+            defaultReminderDurationInSeconds: 15 * 60);
+
+        options.Should().BeEmpty();
+    }
+}

Wino.Core.Tests/Services/CalendarReminderServiceTests.cs

@@ -68,8 +68,8 @@ public class CalendarReminderServiceTests : IAsyncLifetime
         due.Should().HaveCount(1);
         due[0].CalendarItem.Id.Should().Be(calendarItem.Id);
         due[0].ReminderDurationInSeconds.Should().Be(5 * 60);
-        due[0].ReminderKey.Should().Be($"{calendarItem.Id:N}:{5 * 60}");
-        sentReminderKeys.Should().Contain($"{calendarItem.Id:N}:{5 * 60}");
+        due[0].ReminderKey.Should().StartWith($"{calendarItem.Id:N}:{5 * 60}:");
+        sentReminderKeys.Should().ContainSingle(k => k.StartsWith($"{calendarItem.Id:N}:{5 * 60}:"));
     }
 
     [Fact]
@@ -108,7 +108,7 @@ public class CalendarReminderServiceTests : IAsyncLifetime
 
         firstRun.Should().HaveCount(1);
         secondRun.Should().BeEmpty();
-        sentReminderKeys.Should().Contain($"{calendarItem.Id:N}:{5 * 60}");
+        sentReminderKeys.Should().ContainSingle(k => k.StartsWith($"{calendarItem.Id:N}:{5 * 60}:"));
     }
 
     [Fact]
@@ -189,6 +189,35 @@ public class CalendarReminderServiceTests : IAsyncLifetime
         due.Should().BeEmpty();
     }
 
+
+    [Fact]
+    public async Task CheckAndNotifyAsync_WhenItemIsSnoozed_TriggersAtSnoozedTime()
+    {
+        var nowLocal = new DateTime(2026, 1, 1, 10, 0, 0);
+        var lastCheckLocal = nowLocal.AddSeconds(-30);
+
+        var calendarItem = await CreateCalendarItemWithReminderAsync(
+            startDate: nowLocal.AddMinutes(5),
+            reminderDurationInSeconds: 5 * 60,
+            reminderType: CalendarItemReminderType.Popup);
+
+        await _calendarService.SnoozeCalendarItemAsync(calendarItem.Id, nowLocal.AddMinutes(10));
+
+        HashSet<string> sentReminderKeys = [];
+
+        var dueAtOriginalTrigger = await _calendarService.CheckAndNotifyAsync(lastCheckLocal, nowLocal, sentReminderKeys);
+        dueAtOriginalTrigger.Should().BeEmpty();
+
+        var snoozeTriggerWindowStart = nowLocal.AddMinutes(10).AddSeconds(-30);
+        var snoozeTriggerWindowEnd = nowLocal.AddMinutes(10);
+
+        var dueAtSnoozeTime = await _calendarService.CheckAndNotifyAsync(snoozeTriggerWindowStart, snoozeTriggerWindowEnd, sentReminderKeys);
+
+        dueAtSnoozeTime.Should().HaveCount(1);
+        dueAtSnoozeTime[0].CalendarItem.Id.Should().Be(calendarItem.Id);
+        dueAtSnoozeTime[0].ReminderKey.Should().StartWith($"{calendarItem.Id:N}:{5 * 60}:");
+    }
+
     private async Task<CalendarItem> CreateCalendarItemWithReminderAsync(
         DateTime startDate,
         long reminderDurationInSeconds,

Wino.Mail.WinUI/App.xaml.cs

@@ -215,14 +215,22 @@ public partial class App : WinoApplication,
 
         // Check calendar reminder toast activation first.
         if (toastArguments.TryGetValue(Constants.ToastCalendarActionKey, out string calendarAction) &&
-            calendarAction == Constants.ToastCalendarNavigateAction &&
             toastArguments.TryGetValue(Constants.ToastCalendarItemIdKey, out string calendarItemIdString) &&
             Guid.TryParse(calendarItemIdString, out Guid calendarItemId))
+        {
+            if (calendarAction == Constants.ToastCalendarNavigateAction)
             {
                 await HandleCalendarToastNavigationAsync(calendarItemId);
                 return;
             }
 
+            if (calendarAction == Constants.ToastCalendarSnoozeAction)
+            {
+                await HandleCalendarToastSnoozeAsync(toastArgs, calendarItemId);
+                return;
+            }
+        }
+
         // Check if this is a navigation toast (user clicked the notification).
         if (toastArguments.TryGetValue(Constants.ToastActionKey, out MailOperation action) &&
             Guid.TryParse(toastArguments[Constants.ToastMailUniqueIdKey], out Guid mailItemUniqueId))
@@ -267,6 +275,33 @@ public partial class App : WinoApplication,
         navigationService.Navigate(WinoPage.EventDetailsPage, target);
     }
 
+    private async Task HandleCalendarToastSnoozeAsync(AppNotificationActivatedEventArgs toastArgs, Guid calendarItemId)
+    {
+        if (!TryGetSnoozeDurationMinutes(toastArgs, out var snoozeDurationMinutes))
+            return;
+
+        var calendarService = Services.GetRequiredService<ICalendarService>();
+        var snoozedUntilLocal = DateTime.Now.AddMinutes(snoozeDurationMinutes);
+
+        await calendarService.SnoozeCalendarItemAsync(calendarItemId, snoozedUntilLocal).ConfigureAwait(false);
+    }
+
+    private static bool TryGetSnoozeDurationMinutes(AppNotificationActivatedEventArgs toastArgs, out int snoozeDurationMinutes)
+    {
+        snoozeDurationMinutes = 0;
+
+        if (toastArgs.UserInput == null ||
+            !toastArgs.UserInput.TryGetValue(Constants.ToastCalendarSnoozeDurationInputId, out var selectedValue) ||
+            selectedValue == null)
+        {
+            return false;
+        }
+
+        var selectedText = selectedValue.ToString();
+
+        return int.TryParse(selectedText, out snoozeDurationMinutes) && snoozeDurationMinutes > 0;
+    }
+
     /// <summary>
     /// Handles toast notification click for navigation.
     /// Creates window if not running, sets up navigation parameter.

Wino.Mail.WinUI/Services/NotificationBuilder.cs

@@ -5,7 +5,6 @@ using System.Threading.Tasks;
 using CommunityToolkit.Mvvm.Messaging;
 using Microsoft.Toolkit.Uwp.Notifications;
 using Serilog;
-using Windows.ApplicationModel;
 using Windows.Data.Xml.Dom;
 using Windows.UI.Notifications;
 using Wino.Core.Domain.Entities.Calendar;
@@ -26,16 +25,19 @@ public class NotificationBuilder : INotificationBuilder
     private readonly IFolderService _folderService;
     private readonly IMailService _mailService;
     private readonly IThumbnailService _thumbnailService;
+    private readonly IPreferencesService _preferencesService;
 
     public NotificationBuilder(IAccountService accountService,
                                IFolderService folderService,
                                IMailService mailService,
-                               IThumbnailService thumbnailService)
+                               IThumbnailService thumbnailService,
+                               IPreferencesService preferencesService)
     {
         _accountService = accountService;
         _folderService = folderService;
         _mailService = mailService;
         _thumbnailService = thumbnailService;
+        _preferencesService = preferencesService;
 
         WeakReferenceMessenger.Default.Register<MailReadStatusChanged>(this, (r, msg) =>
         {
@@ -96,7 +98,7 @@ public class NotificationBuilder : INotificationBuilder
                     Src = new Uri("ms-winsoundevent:Notification.Mail")
                 });
 
-                ShowToast(builder, ToastTargetApp.Mail);
+                ShowToast(builder);
             }
             else
             {
@@ -151,7 +153,7 @@ public class NotificationBuilder : INotificationBuilder
         });
 
         // Use UniqueId as tag to allow removal
-        ShowToast(builder, ToastTargetApp.Mail, mailItem.UniqueId.ToString());
+        ShowToast(builder, mailItem.UniqueId.ToString());
     }
 
     private ToastButton GetDismissButton()
@@ -242,7 +244,7 @@ public class NotificationBuilder : INotificationBuilder
     {
         try
         {
-            ToastNotificationManager.History.Remove(mailUniqueId.ToString(), null, GetAppUserModelId(ToastTargetApp.Mail));
+            ToastNotificationManager.History.Remove(mailUniqueId.ToString());
         }
         catch (Exception ex)
         {
@@ -263,7 +265,7 @@ public class NotificationBuilder : INotificationBuilder
         builder.AddArgument(Constants.ToastMailAccountIdKey, account.Id.ToString());
         builder.AddArgument(Constants.ToastModeKey, Constants.ToastModeMail);
         builder.AddButton(new ToastButton().SetContent(Translator.Buttons_FixAccount));
-        ShowToast(builder, ToastTargetApp.Mail);
+        ShowToast(builder);
     }
 
     public void CreateWebView2RuntimeMissingNotification()
@@ -276,7 +278,7 @@ public class NotificationBuilder : INotificationBuilder
 
         builder.AddButton(GetDismissButton());
         builder.AddArgument(Constants.ToastModeKey, Constants.ToastModeMail);
-        ShowToast(builder, ToastTargetApp.Mail);
+        ShowToast(builder);
     }
 
     public Task CreateCalendarReminderNotificationAsync(CalendarItem calendarItem, long reminderDurationInSeconds)
@@ -302,19 +304,54 @@ public class NotificationBuilder : INotificationBuilder
         builder.AddArgument(Constants.ToastCalendarActionKey, Constants.ToastCalendarNavigateAction);
         builder.AddArgument(Constants.ToastCalendarItemIdKey, calendarItem.Id.ToString());
         builder.AddArgument(Constants.ToastModeKey, Constants.ToastModeCalendar);
-        builder.AddButton(GetDismissButton());
+
+        var allowedSnoozeMinutes = CalendarReminderSnoozeOptions.GetAllowedSnoozeMinutes(
+            reminderDurationInSeconds,
+            _preferencesService.DefaultReminderDurationInSeconds);
+
+        if (allowedSnoozeMinutes.Count > 0)
+        {
+            var selectionBox = new ToastSelectionBox(Constants.ToastCalendarSnoozeDurationInputId)
+            {
+                DefaultSelectionBoxItemId = allowedSnoozeMinutes[0].ToString()
+            };
+
+            foreach (var snoozeMinutes in allowedSnoozeMinutes)
+            {
+                selectionBox.Items.Add(new ToastSelectionBoxItem(
+                    snoozeMinutes.ToString(),
+                    string.Format(Translator.CalendarReminder_SnoozeMinutesOption, snoozeMinutes)));
+            }
+
+            builder.AddInput(selectionBox);
+            builder.AddButton(new ToastButtonSnooze()
+                .SetSelectionBoxId(Constants.ToastCalendarSnoozeDurationInputId)
+                .AddArgument(Constants.ToastCalendarActionKey, Constants.ToastCalendarSnoozeAction)
+                .AddArgument(Constants.ToastCalendarItemIdKey, calendarItem.Id.ToString())
+                .AddArgument(Constants.ToastModeKey, Constants.ToastModeCalendar));
+        }
+
+        builder.AddButton(new ToastButtonDismiss());
+
+        if (Uri.TryCreate(calendarItem.HtmlLink, UriKind.Absolute, out var joinUri))
+        {
+            builder.AddButton(new ToastButton()
+                .SetContent(Translator.CalendarEventDetails_JoinOnline)
+                .SetProtocolActivation(joinUri));
+        }
+
         builder.AddAudio(new ToastAudio()
         {
             Src = new Uri("ms-winsoundevent:Notification.Reminder")
         });
 
         var tag = $"calendar-reminder-{calendarItem.Id:N}-{reminderDurationInSeconds}";
-        ShowToast(builder, ToastTargetApp.Calendar, tag);
+        ShowToast(builder, tag);
 
         return Task.CompletedTask;
     }
 
-    private static void ShowToast(ToastContentBuilder builder, ToastTargetApp targetApp, string? tag = null)
+    private static void ShowToast(ToastContentBuilder builder, string? tag = null)
     {
         var toastNotification = new ToastNotification(builder.GetToastContent().GetXml());
 
@@ -323,20 +360,7 @@ public class NotificationBuilder : INotificationBuilder
             toastNotification.Tag = tag;
         }
 
-        var appUserModelId = GetAppUserModelId(targetApp);
-        var notifier = ToastNotificationManager.CreateToastNotifier(appUserModelId);
+        var notifier = ToastNotificationManager.CreateToastNotifier();
         notifier.Show(toastNotification);
     }
-
-    private static string GetAppUserModelId(ToastTargetApp targetApp)
-    {
-        _ = targetApp;
-        return $"{Package.Current.Id.FamilyName}!{MailApplicationId}";
-    }
-
-    private enum ToastTargetApp
-    {
-        Mail,
-        Calendar
-    }
 }

Wino.Services/CalendarService.cs

@@ -336,6 +336,12 @@ public class CalendarService : BaseDatabaseService, ICalendarService
         });
     }
 
+    public Task SnoozeCalendarItemAsync(Guid calendarItemId, DateTime snoozedUntilLocal)
+        => Connection.ExecuteAsync(
+            $"UPDATE {nameof(CalendarItem)} SET {nameof(CalendarItem.SnoozedUntil)} = ? WHERE {nameof(CalendarItem.Id)} = ?",
+            snoozedUntilLocal,
+            calendarItemId);
+
     public async Task<List<CalendarReminderNotificationRequest>> CheckAndNotifyAsync(DateTime lastCheckLocal, DateTime nowLocal, ISet<string> sentReminderKeys, CancellationToken cancellationToken = default)
     {
         if (sentReminderKeys == null)
@@ -347,7 +353,8 @@ public class CalendarService : BaseDatabaseService, ICalendarService
                 c.Id AS CalendarItemId,
                 c.StartDate,
                 c.StartTimeZone,
-                r.DurationInSeconds AS ReminderDurationInSeconds
+                r.DurationInSeconds AS ReminderDurationInSeconds,
+                c.SnoozedUntil
             FROM CalendarItem c
             INNER JOIN Reminder r ON r.CalendarItemId = c.Id
             INNER JOIN AccountCalendar ac ON ac.Id = c.CalendarId
@@ -367,11 +374,14 @@ public class CalendarService : BaseDatabaseService, ICalendarService
 
             var eventStartLocal = candidate.StartDate.ToLocalTimeFromTimeZone(candidate.StartTimeZone);
             var triggerTimeLocal = eventStartLocal.AddSeconds(-candidate.ReminderDurationInSeconds);
+            var effectiveTriggerTimeLocal = candidate.SnoozedUntil.HasValue
+                ? MaxDateTime(triggerTimeLocal, candidate.SnoozedUntil.Value)
+                : triggerTimeLocal;
 
-            if (triggerTimeLocal <= lastCheckLocal || triggerTimeLocal > nowLocal)
+            if (effectiveTriggerTimeLocal <= lastCheckLocal || effectiveTriggerTimeLocal > nowLocal)
                 continue;
 
-            var reminderKey = $"{candidate.CalendarItemId:N}:{candidate.ReminderDurationInSeconds}";
+            var reminderKey = $"{candidate.CalendarItemId:N}:{candidate.ReminderDurationInSeconds}:{effectiveTriggerTimeLocal.Ticks}";
             if (!sentReminderKeys.Add(reminderKey))
                 continue;
 
@@ -438,11 +448,15 @@ public class CalendarService : BaseDatabaseService, ICalendarService
 
     #endregion
 
+    private static DateTime MaxDateTime(DateTime first, DateTime second)
+        => first >= second ? first : second;
+
     private sealed class CalendarReminderCandidate
     {
         public Guid CalendarItemId { get; set; }
         public DateTime StartDate { get; set; }
         public string StartTimeZone { get; set; }
         public long ReminderDurationInSeconds { get; set; }
+        public DateTime? SnoozedUntil { get; set; }
     }
 }

Wino.Services/DatabaseService.cs

@@ -117,6 +117,15 @@ public class DatabaseService : IDatabaseService
                 .ExecuteAsync($"ALTER TABLE {nameof(CustomServerInformation)} ADD COLUMN {nameof(CustomServerInformation.CalendarSupportMode)} INTEGER NOT NULL DEFAULT 0")
                 .ConfigureAwait(false);
         }
+
+        var calendarItemColumns = await Connection.GetTableInfoAsync(nameof(CalendarItem)).ConfigureAwait(false);
+
+        if (!calendarItemColumns.Any(c => c.Name == nameof(CalendarItem.SnoozedUntil)))
+        {
+            await Connection
+                .ExecuteAsync($"ALTER TABLE {nameof(CalendarItem)} ADD COLUMN {nameof(CalendarItem.SnoozedUntil)} TEXT NULL")
+                .ConfigureAwait(false);
+        }
     }
 
     private async Task EnsureIndexesAsync()