Add unread and mention badges with notification sounds for channels

src/Decho/Decho.csproj

@@ -24,6 +24,7 @@
       <PrivateAssets Condition="'$(Configuration)' != 'Debug'">All</PrivateAssets>
     </PackageReference>
     <PackageReference Include="MessageBox.Avalonia" Version="3.2.0" />
+    <PackageReference Include="NetCoreAudio" Version="2.0.1" />
     <PackageReference Include="Projektanker.Icons.Avalonia.FontAwesome" Version="9.6.2" />
     <PackageReference Include="ReactiveUI.Avalonia" Version="11.3.8" />
     <PackageReference Include="Romzetron.Avalonia" Version="11.3.4" />

src/Decho/ViewModels/ChannelViewModel.cs

@@ -36,9 +36,68 @@ public sealed class ChannelViewModel(ChannelModel model) : ViewModelBase
         set => this.RaiseAndSetIfChanged(ref field, value);
     }
 
+    public int UnreadCount
+    {
+        get => field;
+        set
+        {
+            if (field == value)
+            {
+                return;
+            }
+
+            field = value;
+            this.RaisePropertyChanged();
+            this.RaisePropertyChanged(nameof(HasUnread));
+            this.RaisePropertyChanged(nameof(BadgeText));
+            this.RaisePropertyChanged(nameof(BadgeColor));
+        }
+    }
+
+    public bool HasUnread => UnreadCount > 0;
+
+    public int MentionCount
+    {
+        get => field;
+        set
+        {
+            if (field == value)
+            {
+                return;
+            }
+
+            field = value;
+            this.RaisePropertyChanged();
+            this.RaisePropertyChanged(nameof(HasMentions));
+            this.RaisePropertyChanged(nameof(BadgeText));
+            this.RaisePropertyChanged(nameof(BadgeColor));
+        }
+    }
+
+    public bool HasMentions => MentionCount > 0;
+
+    public string BadgeColor => HasMentions ? "#E53935" : "#78909C";
+
+    public string BadgeText => HasMentions ? MentionCount.ToString() : UnreadCount.ToString();
+
     public ObservableCollection<MessageViewModel> Messages { get; } = new ObservableCollection<MessageViewModel>(
             model.Messages.Select(message => new MessageViewModel(message)));
 
+    public void IncrementUnread(bool isMention = false)
+    {
+        UnreadCount++;
+        if (isMention)
+        {
+            MentionCount++;
+        }
+    }
+
+    public void ClearUnread()
+    {
+        UnreadCount = 0;
+        MentionCount = 0;
+    }
+
     public void ClearMessages()
     {
         Model.Messages.Clear();

src/Decho/ViewModels/MainWindowViewModel.cs

@@ -6,6 +6,7 @@ using Decho.Views;
 
 using EchoHub.Client.Commands;
 using EchoHub.Client.Config;
+using EchoHub.Client.Services;
 using EchoHub.Core.Constants;
 using EchoHub.Core.DTOs;
 using EchoHub.Core.Models;
@@ -22,6 +23,7 @@ namespace Decho.ViewModels;
 public sealed class MainWindowViewModel : ViewModelBase
 {
     private readonly CommandHandler _commandHandler;
+    private readonly NotificationSoundService _notificationService;
     private Window? _mainWindow;
 
     public string Title { get; } = "Decho";
@@ -44,6 +46,7 @@ public sealed class MainWindowViewModel : ViewModelBase
     {
         ConnectionService = new ConnectionService();
         _commandHandler = new CommandHandler();
+        _notificationService = new NotificationSoundService(ConfigManager.Load().Notifications);
 
         Sidebar = new SidebarViewModel();
         Chat = new ChatViewModel();
@@ -360,7 +363,7 @@ public sealed class MainWindowViewModel : ViewModelBase
             await ConnectionService.NukeChannelAsync(serverUrl, channel);
         };
 
-        _commandHandler.OnTestSound += () => Task.CompletedTask;
+        _commandHandler.OnTestSound += _notificationService.PlayTestAsync;
 
         _commandHandler.OnQuit += () =>
         {
@@ -554,11 +557,29 @@ public sealed class MainWindowViewModel : ViewModelBase
 
         ConnectionService.MessageReceived += (serverUrl, message) =>
         {
+            string? username = ConnectionService.GetCurrentUsername(serverUrl);
+            bool isMention = !string.IsNullOrEmpty(username)
+                && message.Content.Contains($"@{username}", StringComparison.OrdinalIgnoreCase);
+
             Avalonia.Threading.Dispatcher.UIThread.Post(() =>
             {
                 ChannelViewModel? channelVm = FindChannelViewModel(serverUrl, message.ChannelName);
-                channelVm?.AddMessage(message);
+                if (channelVm is not null)
+                {
+                    channelVm.AddMessage(message);
+                    bool isSelected = string.Equals(Chat.CurrentChannelName, message.ChannelName, StringComparison.OrdinalIgnoreCase)
+                        && string.Equals(Chat.CurrentServerUrl, serverUrl, StringComparison.OrdinalIgnoreCase);
+                    if (!isSelected)
+                    {
+                        channelVm.IncrementUnread(isMention);
+                    }
+                }
             });
+
+            if (isMention)
+            {
+                _ = _notificationService.PlayAsync();
+            }
         };
 
         ConnectionService.ErrorOccurred += (serverUrl, error) =>
@@ -646,6 +667,8 @@ public sealed class MainWindowViewModel : ViewModelBase
             return;
         }
 
+        channel.ClearUnread();
+
         string serverUrl = FindServerUrlForChannel(channel);
         bool isServerConnected = Sidebar.GetServer(serverUrl)?.IsConnected ?? false;
         Chat.SetChannel(channel, serverUrl, isServerConnected);

src/Decho/ViewModels/MessageViewModel.cs

@@ -25,12 +25,12 @@ public sealed class MessageViewModel(MessageModel model) : ViewModelBase
                 return Brushes.White;
             }
 
-            try 
-            { 
+            try
+            {
                 return new SolidColorBrush(Color.Parse(color));
             }
             catch
-            { 
+            {
                 return null;
             }
         }

src/Decho/Views/ChannelListView.axaml

@@ -12,12 +12,24 @@
              SelectedItem="{Binding SelectedChannel, Mode=TwoWay}">
         <ListBox.ItemTemplate>
             <DataTemplate x:DataType="vm:ChannelViewModel">
-                <TextBlock>
-                    <InlineUIContainer BaselineAlignment="Bottom">
-                        <i:Icon Value="fa-hashtag" FontWeight="Bold" Margin="0 0 0 1" />
-                    </InlineUIContainer>
-                    <Run Text="{Binding Name}" />
-                </TextBlock>
+                <Grid ColumnDefinitions="Auto, *, Auto" Margin="2 0">
+                    <i:Icon Grid.Column="0" Value="fa-hashtag" FontWeight="Bold" Margin="0 0 4 1" VerticalAlignment="Center" />
+                    <TextBlock Grid.Column="1" Text="{Binding Name}" TextTrimming="CharacterEllipsis" VerticalAlignment="Center" />
+                    <Border Grid.Column="2"
+                            IsVisible="{Binding HasUnread}"
+                            Background="{Binding BadgeColor}"
+                            CornerRadius="8"
+                            MinWidth="16"
+                            Height="16"
+                            Padding="4 0"
+                            Margin="4 0 0 0">
+                        <TextBlock Text="{Binding BadgeText}"
+                                   FontSize="11"
+                                   Foreground="White"
+                                   HorizontalAlignment="Center"
+                                   VerticalAlignment="Center" />
+                    </Border>
+                </Grid>
             </DataTemplate>
         </ListBox.ItemTemplate>
     </ListBox>