6 files changed, 546 insertions, 380 deletions
diff --git a/Ryujinx.Ava/Assets/Locales/en_US.json b/Ryujinx.Ava/Assets/Locales/en_US.json
index db8d2424..fb8f800c 100644
--- a/Ryujinx.Ava/Assets/Locales/en_US.json
+++ b/Ryujinx.Ava/Assets/Locales/en_US.json
@@ -583,10 +583,10 @@
   "SelectUpdateDialogTitle": "Select update files",
   "UserProfileWindowTitle": "User Profiles Manager",
   "CheatWindowTitle": "Cheats Manager",
-  "DlcWindowTitle": "Downloadable Content Manager",
+  "DlcWindowTitle": "Manage Downloadable Content for {0} ({1})",
   "UpdateWindowTitle": "Title Update Manager",
   "CheatWindowHeading": "Cheats Available for {0} [{1}]",
-  "DlcWindowHeading": "{0} Downloadable Content(s) available for {1} ({2})",
+  "DlcWindowHeading": "{0} Downloadable Content(s)",
   "UserProfilesEditProfile": "Edit Selected",
   "Cancel": "Cancel",
   "Save": "Save",
diff --git a/Ryujinx.Ava/UI/Models/DownloadableContentModel.cs b/Ryujinx.Ava/UI/Models/DownloadableContentModel.cs
index 3070fc02..b2ad0d31 100644
--- a/Ryujinx.Ava/UI/Models/DownloadableContentModel.cs
+++ b/Ryujinx.Ava/UI/Models/DownloadableContentModel.cs
@@ -1,4 +1,5 @@
 using Ryujinx.Ava.UI.ViewModels;
+using System.IO;
 
 namespace Ryujinx.Ava.UI.Models
 {
@@ -21,6 +22,8 @@ namespace Ryujinx.Ava.UI.Models
         public string ContainerPath { get; }
         public string FullPath      { get; }
 
+        public string FileName => Path.GetFileName(ContainerPath);
+
         public DownloadableContentModel(string titleId, string containerPath, string fullPath, bool enabled)
         {
             TitleId       = titleId;
diff --git a/Ryujinx.Ava/UI/ViewModels/DownloadableContentManagerViewModel.cs b/Ryujinx.Ava/UI/ViewModels/DownloadableContentManagerViewModel.cs
new file mode 100644
index 00000000..e5e4f66b
--- /dev/null
+++ b/Ryujinx.Ava/UI/ViewModels/DownloadableContentManagerViewModel.cs
@@ -0,0 +1,340 @@
+using Avalonia.Collections;
+using Avalonia.Controls;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Threading;
+using DynamicData;
+using LibHac.Common;
+using LibHac.Fs;
+using LibHac.Fs.Fsa;
+using LibHac.FsSystem;
+using LibHac.Tools.Fs;
+using LibHac.Tools.FsSystem;
+using LibHac.Tools.FsSystem.NcaUtils;
+using Ryujinx.Ava.Common.Locale;
+using Ryujinx.Ava.UI.Helpers;
+using Ryujinx.Ava.UI.Models;
+using Ryujinx.Common.Configuration;
+using Ryujinx.Common.Logging;
+using Ryujinx.Common.Utilities;
+using Ryujinx.HLE.FileSystem;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Path = System.IO.Path;
+
+namespace Ryujinx.Ava.UI.ViewModels
+{
+    public class DownloadableContentManagerViewModel : BaseModel
+    {
+        private readonly List<DownloadableContentContainer> _downloadableContentContainerList;
+        private readonly string                             _downloadableContentJsonPath;
+
+        private VirtualFileSystem                      _virtualFileSystem;
+        private AvaloniaList<DownloadableContentModel> _downloadableContents = new();
+        private AvaloniaList<DownloadableContentModel> _views = new();
+        private AvaloniaList<DownloadableContentModel> _selectedDownloadableContents = new();
+
+        private string _search;
+        private ulong _titleId;
+        private string _titleName;
+
+        public AvaloniaList<DownloadableContentModel> DownloadableContents
+        {
+            get => _downloadableContents;
+            set
+            {
+                _downloadableContents = value;
+                OnPropertyChanged();
+                OnPropertyChanged(nameof(UpdateCount));
+                Sort();
+            }
+        }
+
+        public AvaloniaList<DownloadableContentModel> Views
+        {
+            get => _views;
+            set
+            {
+                _views = value;
+                OnPropertyChanged();
+            }
+        }
+
+        public AvaloniaList<DownloadableContentModel> SelectedDownloadableContents
+        {
+            get => _selectedDownloadableContents;
+            set
+            {
+                _selectedDownloadableContents = value;
+                OnPropertyChanged();
+            }
+        }
+
+        public string Search
+        {
+            get => _search;
+            set
+            {
+                _search = value;
+                OnPropertyChanged();
+                Sort();
+            }
+        }
+
+        public string UpdateCount
+        {
+            get => string.Format(LocaleManager.Instance[LocaleKeys.DlcWindowHeading], DownloadableContents.Count);
+        }
+
+        public DownloadableContentManagerViewModel(VirtualFileSystem virtualFileSystem, ulong titleId, string titleName)
+        {
+            _virtualFileSystem = virtualFileSystem;
+
+            _titleId   = titleId;
+            _titleName = titleName;
+
+            _downloadableContentJsonPath = Path.Combine(AppDataManager.GamesDirPath, titleId.ToString("x16"), "dlc.json");
+
+            try
+            {
+                _downloadableContentContainerList = JsonHelper.DeserializeFromFile<List<DownloadableContentContainer>>(_downloadableContentJsonPath);
+            }
+            catch
+            {
+                Logger.Error?.Print(LogClass.Configuration, "Downloadable Content JSON failed to deserialize.");
+                _downloadableContentContainerList = new List<DownloadableContentContainer>();
+            }
+
+            LoadDownloadableContents();
+        }
+
+        private void LoadDownloadableContents()
+        {
+            foreach (DownloadableContentContainer downloadableContentContainer in _downloadableContentContainerList)
+            {
+                if (File.Exists(downloadableContentContainer.ContainerPath))
+                {
+                    using FileStream containerFile = File.OpenRead(downloadableContentContainer.ContainerPath);
+
+                    PartitionFileSystem partitionFileSystem = new(containerFile.AsStorage());
+
+                    _virtualFileSystem.ImportTickets(partitionFileSystem);
+
+                    foreach (DownloadableContentNca downloadableContentNca in downloadableContentContainer.DownloadableContentNcaList)
+                    {
+                        using UniqueRef<IFile> ncaFile = new();
+
+                        partitionFileSystem.OpenFile(ref ncaFile.Ref, downloadableContentNca.FullPath.ToU8Span(), OpenMode.Read).ThrowIfFailure();
+
+                        Nca nca = TryOpenNca(ncaFile.Get.AsStorage(), downloadableContentContainer.ContainerPath);
+                        if (nca != null)
+                        {   
+                            var content = new DownloadableContentModel(nca.Header.TitleId.ToString("X16"),
+                                downloadableContentContainer.ContainerPath,
+                                downloadableContentNca.FullPath,
+                                downloadableContentNca.Enabled);
+
+                            DownloadableContents.Add(content);
+
+                            if (content.Enabled)
+                            {
+                                SelectedDownloadableContents.Add(content);
+                            }
+
+                            OnPropertyChanged(nameof(UpdateCount));
+                        }
+                    }
+                }
+            }
+
+            // NOTE: Save the list again to remove leftovers.
+            Save();
+            Sort();
+        }
+
+        public void Sort()
+        {
+            DownloadableContents.AsObservableChangeSet()
+                .Filter(Filter)
+                .Bind(out var view).AsObservableList();
+
+            _views.Clear();
+            _views.AddRange(view);
+            OnPropertyChanged(nameof(Views));
+        }
+
+        private bool Filter(object arg)
+        {
+            if (arg is DownloadableContentModel content)
+            {
+                return string.IsNullOrWhiteSpace(_search) || content.FileName.ToLower().Contains(_search.ToLower()) || content.TitleId.ToLower().Contains(_search.ToLower());
+            }
+
+            return false;
+        }
+
+        private Nca TryOpenNca(IStorage ncaStorage, string containerPath)
+        {
+            try
+            {
+                return new Nca(_virtualFileSystem.KeySet, ncaStorage);
+            }
+            catch (Exception ex)
+            {
+                Dispatcher.UIThread.InvokeAsync(async () =>
+                {
+                    await ContentDialogHelper.CreateErrorDialog(string.Format(LocaleManager.Instance[LocaleKeys.DialogLoadNcaErrorMessage], ex.Message, containerPath));
+                });
+            }
+
+            return null;
+        }
+
+        public async void Add()
+        {
+            OpenFileDialog dialog = new OpenFileDialog()
+            {
+                Title         = LocaleManager.Instance[LocaleKeys.SelectDlcDialogTitle],
+                AllowMultiple = true
+            };
+
+            dialog.Filters.Add(new FileDialogFilter
+            {
+                Name       = "NSP",
+                Extensions = { "nsp" }
+            });
+
+            if (Avalonia.Application.Current.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+            {
+                string[] files = await dialog.ShowAsync(desktop.MainWindow);
+
+                if (files != null)
+                {
+                    foreach (string file in files)
+                    {
+                        await AddDownloadableContent(file);
+                    }
+                }
+            }
+        }
+
+        private async Task AddDownloadableContent(string path)
+        {
+            if (!File.Exists(path) || DownloadableContents.FirstOrDefault(x => x.ContainerPath == path) != null)
+            {
+                return;
+            }
+
+            using FileStream containerFile = File.OpenRead(path);
+
+            PartitionFileSystem partitionFileSystem         = new(containerFile.AsStorage());
+            bool                containsDownloadableContent = false;
+
+            _virtualFileSystem.ImportTickets(partitionFileSystem);
+
+            foreach (DirectoryEntryEx fileEntry in partitionFileSystem.EnumerateEntries("/", "*.nca"))
+            {
+                using var ncaFile = new UniqueRef<IFile>();
+
+                partitionFileSystem.OpenFile(ref ncaFile.Ref, fileEntry.FullPath.ToU8Span(), OpenMode.Read).ThrowIfFailure();
+
+                Nca nca = TryOpenNca(ncaFile.Get.AsStorage(), path);
+                if (nca == null)
+                {
+                    continue;
+                }
+
+                if (nca.Header.ContentType == NcaContentType.PublicData)
+                {
+                    if ((nca.Header.TitleId & 0xFFFFFFFFFFFFE000) != _titleId)
+                    {
+                        break;
+                    }
+
+                    var content = new DownloadableContentModel(nca.Header.TitleId.ToString("X16"), path, fileEntry.FullPath, true);
+                    DownloadableContents.Add(content);
+                    SelectedDownloadableContents.Add(content);
+
+                    OnPropertyChanged(nameof(UpdateCount));
+                    Sort();
+
+                    containsDownloadableContent = true;
+                }
+            }
+
+            if (!containsDownloadableContent)
+            {
+                await ContentDialogHelper.CreateErrorDialog(LocaleManager.Instance[LocaleKeys.DialogDlcNoDlcErrorMessage]);
+            }
+        }
+
+        public void Remove(DownloadableContentModel model)
+        {
+            DownloadableContents.Remove(model);
+            OnPropertyChanged(nameof(UpdateCount));
+            Sort();
+        }
+
+        public void RemoveAll()
+        {
+            DownloadableContents.Clear();
+            OnPropertyChanged(nameof(UpdateCount));
+            Sort();
+        }
+
+        public void EnableAll()
+        {
+            SelectedDownloadableContents = new(DownloadableContents);
+        }
+
+        public void DisableAll()
+        {
+            SelectedDownloadableContents.Clear();
+        }
+
+        public void Save()
+        {
+            _downloadableContentContainerList.Clear();
+
+            DownloadableContentContainer container = default;
+
+            foreach (DownloadableContentModel downloadableContent in DownloadableContents)
+            {
+                if (container.ContainerPath != downloadableContent.ContainerPath)
+                {
+                    if (!string.IsNullOrWhiteSpace(container.ContainerPath))
+                    {
+                        _downloadableContentContainerList.Add(container);
+                    }
+
+                    container = new DownloadableContentContainer
+                    {
+                        ContainerPath              = downloadableContent.ContainerPath,
+                        DownloadableContentNcaList = new List<DownloadableContentNca>()
+                    };
+                }
+
+                container.DownloadableContentNcaList.Add(new DownloadableContentNca
+                {
+                    Enabled  = downloadableContent.Enabled,
+                    TitleId  = Convert.ToUInt64(downloadableContent.TitleId, 16),
+                    FullPath = downloadableContent.FullPath
+                });
+            }
+
+            if (!string.IsNullOrWhiteSpace(container.ContainerPath))
+            {
+                _downloadableContentContainerList.Add(container);
+            }
+
+            using (FileStream downloadableContentJsonStream = File.Create(_downloadableContentJsonPath, 4096, FileOptions.WriteThrough))
+            {
+                downloadableContentJsonStream.Write(Encoding.UTF8.GetBytes(JsonHelper.Serialize(_downloadableContentContainerList, true)));
+            }
+        }
+
+    }
+}
+\ No newline at end of file
diff --git a/Ryujinx.Ava/UI/ViewModels/MainWindowViewModel.cs b/Ryujinx.Ava/UI/ViewModels/MainWindowViewModel.cs
index 489dfe62..a3663af3 100644
--- a/Ryujinx.Ava/UI/ViewModels/MainWindowViewModel.cs
+++ b/Ryujinx.Ava/UI/ViewModels/MainWindowViewModel.cs
@@ -1564,7 +1564,7 @@ namespace Ryujinx.Ava.UI.ViewModels
         {
             if (SelectedApplication != null)
             {
-                await new DownloadableContentManagerWindow(VirtualFileSystem, ulong.Parse(SelectedApplication.TitleId, NumberStyles.HexNumber), SelectedApplication.TitleName).ShowDialog(TopLevel as Window);
+                await DownloadableContentManagerWindow.Show(VirtualFileSystem, ulong.Parse(SelectedApplication.TitleId, NumberStyles.HexNumber), SelectedApplication.TitleName);
             }
         }
 
diff --git a/Ryujinx.Ava/UI/Windows/DownloadableContentManagerWindow.axaml b/Ryujinx.Ava/UI/Windows/DownloadableContentManagerWindow.axaml
index e524d6e4..fe446fb3 100644
--- a/Ryujinx.Ava/UI/Windows/DownloadableContentManagerWindow.axaml
+++ b/Ryujinx.Ava/UI/Windows/DownloadableContentManagerWindow.axaml
@@ -1,172 +1,194 @@
-<window:StyleableWindow
+<UserControl
     x:Class="Ryujinx.Ava.UI.Windows.DownloadableContentManagerWindow"
     xmlns="https://github.com/avaloniaui"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:locale="clr-namespace:Ryujinx.Ava.Common.Locale"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-    xmlns:window="clr-namespace:Ryujinx.Ava.UI.Windows"
-    Width="800"
-    Height="500"
-    MinWidth="800"
-    MinHeight="500"
-    MaxWidth="800"
-    MaxHeight="500"
-    SizeToContent="Height"
-    WindowStartupLocation="CenterOwner"
+    xmlns:viewModels="clr-namespace:Ryujinx.Ava.UI.ViewModels"
+    xmlns:models="clr-namespace:Ryujinx.Ava.UI.Models"
+    xmlns:ui="clr-namespace:FluentAvalonia.UI.Controls;assembly=FluentAvalonia"
+    Width="500"
+    Height="380"
     mc:Ignorable="d"
+    x:CompileBindings="True"
+    x:DataType="viewModels:DownloadableContentManagerViewModel"
     Focusable="True">
-    <Grid Name="DownloadableContentGrid" Margin="15">
+    <Grid>
         <Grid.RowDefinitions>
             <RowDefinition Height="Auto" />
-            <RowDefinition Height="Auto" />
-            <RowDefinition Height="Auto" />
             <RowDefinition Height="*" />
             <RowDefinition Height="Auto" />
         </Grid.RowDefinitions>
-        <TextBlock
-            Name="Heading"
-            Grid.Row="1"
-            MaxWidth="500"
-            Margin="20,15,20,20"
-            HorizontalAlignment="Center"
-            VerticalAlignment="Center"
-            LineHeight="18"
-            TextAlignment="Center"
-            TextWrapping="Wrap" />
-        <DockPanel
-            Grid.Row="2"
-            Margin="0"
-            HorizontalAlignment="Left">
-            <Button
-                Name="EnableAllButton"
-                MinWidth="90"
-                Margin="5"
-                Command="{Binding EnableAll}">
-                <TextBlock Text="{locale:Locale DlcManagerEnableAllButton}" />
-            </Button>
-            <Button
-                Name="DisableAllButton"
-                MinWidth="90"
-                Margin="5"
-                Command="{Binding DisableAll}">
-                <TextBlock Text="{locale:Locale DlcManagerDisableAllButton}" />
-            </Button>
-        </DockPanel>
+        <Panel
+            Margin="0 0 0 10"
+            Grid.Row="0">
+            <Grid>
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="Auto" />
+                    <ColumnDefinition Width="Auto" />
+                    <ColumnDefinition Width="*" />
+                </Grid.ColumnDefinitions>
+                <TextBlock
+                    Grid.Column="0"
+                    Text="{Binding UpdateCount}" />
+                <StackPanel
+                    Margin="10 0"
+                    Grid.Column="1"
+                    Orientation="Horizontal">
+                    <Button
+                        Name="EnableAllButton"
+                        MinWidth="90"
+                        Margin="5"
+                        Command="{ReflectionBinding EnableAll}">
+                        <TextBlock Text="{locale:Locale DlcManagerEnableAllButton}" />
+                    </Button>
+                    <Button
+                        Name="DisableAllButton"
+                        MinWidth="90"
+                        Margin="5"
+                        Command="{ReflectionBinding DisableAll}">
+                        <TextBlock Text="{locale:Locale DlcManagerDisableAllButton}" />
+                    </Button>
+                </StackPanel>
+                <TextBox
+                    Grid.Column="2"
+                    MinHeight="27"
+                    MaxHeight="27"
+                    HorizontalAlignment="Stretch"
+                    Watermark="{locale:Locale Search}"
+                    Text="{Binding Search}" />
+            </Grid>
+        </Panel>
         <Border
-            Grid.Row="3"
-            Margin="5"
+            Grid.Row="1"
+            Margin="0 0 0 24"
             HorizontalAlignment="Stretch"
             VerticalAlignment="Stretch"
-            BorderBrush="Gray"
-            BorderThickness="1">
-            <ScrollViewer
-                VerticalAlignment="Stretch"
-                HorizontalScrollBarVisibility="Auto"
-                VerticalScrollBarVisibility="Auto">
-                <DataGrid
-                    Name="DlcDataGrid"
-                    MinHeight="200"
-                    HorizontalAlignment="Stretch"
-                    VerticalAlignment="Stretch"
-                    CanUserReorderColumns="False"
-                    CanUserResizeColumns="True"
-                    CanUserSortColumns="True"
-                    HorizontalScrollBarVisibility="Auto"
-                    Items="{Binding _downloadableContents}"
-                    SelectionMode="Extended"
-                    VerticalScrollBarVisibility="Auto">
-                    <DataGrid.Styles>
-                        <Styles>
-                            <Style Selector="DataGridCell:nth-child(3), DataGridCell:nth-child(4)">
-                                <Setter Property="HorizontalAlignment" Value="Left" />
-                                <Setter Property="HorizontalContentAlignment" Value="Left" />
-                            </Style>
-                        </Styles>
-                        <Styles>
-                            <Style Selector="DataGridCell:nth-child(1)">
-                                <Setter Property="HorizontalAlignment" Value="Right" />
-                                <Setter Property="HorizontalContentAlignment" Value="Right" />
-                            </Style>
-                        </Styles>
-                    </DataGrid.Styles>
-                    <DataGrid.Columns>
-                        <DataGridTemplateColumn Width="90">
-                            <DataGridTemplateColumn.CellTemplate>
-                                <DataTemplate>
-                                    <CheckBox
-                                        Width="50"
-                                        MinWidth="40"
-                                        HorizontalAlignment="Center"
-                                        IsChecked="{Binding Enabled}" />
-                                </DataTemplate>
-                            </DataGridTemplateColumn.CellTemplate>
-                            <DataGridTemplateColumn.Header>
-                                <TextBlock Text="{locale:Locale DlcManagerTableHeadingEnabledLabel}" />
-                            </DataGridTemplateColumn.Header>
-                        </DataGridTemplateColumn>
-                        <DataGridTextColumn Width="140" Binding="{Binding TitleId}">
-                            <DataGridTextColumn.Header>
-                                <TextBlock Text="{locale:Locale DlcManagerTableHeadingTitleIdLabel}" />
-                            </DataGridTextColumn.Header>
-                        </DataGridTextColumn>
-                        <DataGridTextColumn Width="280" Binding="{Binding FullPath}">
-                            <DataGridTextColumn.Header>
-                                <TextBlock Text="{locale:Locale DlcManagerTableHeadingFullPathLabel}" />
-                            </DataGridTextColumn.Header>
-                        </DataGridTextColumn>
-                        <DataGridTextColumn Binding="{Binding ContainerPath}">
-                            <DataGridTextColumn.Header>
-                                <TextBlock Text="{locale:Locale DlcManagerTableHeadingContainerPathLabel}" />
-                            </DataGridTextColumn.Header>
-                        </DataGridTextColumn>
-                    </DataGrid.Columns>
-                </DataGrid>
-            </ScrollViewer>
+            BorderBrush="{DynamicResource AppListHoverBackgroundColor}"
+            BorderThickness="1"
+            CornerRadius="5"
+            Padding="2.5">
+            <ListBox
+                AutoScrollToSelectedItem="False"
+                VirtualizationMode="None"
+                SelectionMode="Multiple, Toggle"
+                Background="Transparent"
+                SelectionChanged="OnSelectionChanged"
+                SelectedItems="{Binding SelectedDownloadableContents, Mode=TwoWay}"
+                Items="{Binding Views}">
+                <ListBox.DataTemplates>
+                    <DataTemplate
+                        DataType="models:DownloadableContentModel">
+                        <Panel Margin="10">
+                            <Grid>
+                                <Grid.ColumnDefinitions>
+                                    <ColumnDefinition Width="*" />
+                                    <ColumnDefinition Width="Auto" />
+                                </Grid.ColumnDefinitions>
+                                <Grid
+                                    Grid.Column="0">
+                                    <Grid.ColumnDefinitions>
+                                        <ColumnDefinition Width="*"></ColumnDefinition>
+                                        <ColumnDefinition Width="Auto"></ColumnDefinition>
+                                    </Grid.ColumnDefinitions>
+                                    <TextBlock
+                                        Grid.Column="0"
+                                        HorizontalAlignment="Left"
+                                        VerticalAlignment="Center"
+                                        MaxLines="2"
+                                        TextWrapping="Wrap"
+                                        TextTrimming="CharacterEllipsis"
+                                        Text="{Binding FileName}" />
+                                    <TextBlock
+                                        Grid.Column="1"
+                                        Margin="10 0"
+                                        HorizontalAlignment="Left"
+                                        VerticalAlignment="Center"
+                                        Text="{Binding TitleId}" />
+                                </Grid>
+                                <StackPanel
+                                    Grid.Column="1"
+                                    Spacing="10"
+                                    Orientation="Horizontal"
+                                    HorizontalAlignment="Right">
+                                    <Button
+                                        VerticalAlignment="Center"
+                                        HorizontalAlignment="Right"
+                                        Padding="10"
+                                        MinWidth="0"
+                                        MinHeight="0"
+                                        Click="OpenLocation">
+                                        <ui:SymbolIcon
+                                            Symbol="OpenFolder"
+                                            HorizontalAlignment="Center"
+                                            VerticalAlignment="Center" />
+                                    </Button>
+                                    <Button
+                                        VerticalAlignment="Center"
+                                        HorizontalAlignment="Right"
+                                        Padding="10"
+                                        MinWidth="0"
+                                        MinHeight="0"
+                                        Click="RemoveDLC">
+                                        <ui:SymbolIcon
+                                            Symbol="Cancel"
+                                            HorizontalAlignment="Center"
+                                            VerticalAlignment="Center" />
+                                    </Button>
+                                </StackPanel>
+                            </Grid>
+                        </Panel>
+                    </DataTemplate>
+                </ListBox.DataTemplates>
+                <ListBox.Styles>
+                    <Style Selector="ListBoxItem">
+                        <Setter Property="Background" Value="Transparent" />
+                    </Style>
+                </ListBox.Styles>
+            </ListBox>
         </Border>
-        <DockPanel
-            Grid.Row="4"
-            Margin="0"
+        <Panel
+            Grid.Row="2"
             HorizontalAlignment="Stretch">
-            <DockPanel Margin="0" HorizontalAlignment="Left">
+            <StackPanel
+                Orientation="Horizontal"
+                Spacing="10"
+                HorizontalAlignment="Left">
                 <Button
                     Name="AddButton"
                     MinWidth="90"
                     Margin="5"
-                    Command="{Binding Add}">
+                    Command="{ReflectionBinding Add}">
                     <TextBlock Text="{locale:Locale SettingsTabGeneralAdd}" />
                 </Button>
                 <Button
-                    Name="RemoveButton"
-                    MinWidth="90"
-                    Margin="5"
-                    Command="{Binding RemoveSelected}">
-                    <TextBlock Text="{locale:Locale SettingsTabGeneralRemove}" />
-                </Button>
-                <Button
                     Name="RemoveAllButton"
                     MinWidth="90"
                     Margin="5"
-                    Command="{Binding RemoveAll}">
+                    Command="{ReflectionBinding RemoveAll}">
                     <TextBlock Text="{locale:Locale DlcManagerRemoveAllButton}" />
                 </Button>
-            </DockPanel>
-            <DockPanel Margin="0" HorizontalAlignment="Right">
+            </StackPanel>
+            <StackPanel
+                Orientation="Horizontal"
+                Spacing="10"
+                HorizontalAlignment="Right">
                 <Button
                     Name="SaveButton"
                     MinWidth="90"
                     Margin="5"
-                    Command="{Binding SaveAndClose}">
+                    Click="SaveAndClose">
                     <TextBlock Text="{locale:Locale SettingsButtonSave}" />
                 </Button>
                 <Button
                     Name="CancelButton"
                     MinWidth="90"
                     Margin="5"
-                    Command="{Binding Close}">
+                    Click="Close">
                     <TextBlock Text="{locale:Locale InputDialogCancel}" />
                 </Button>
-            </DockPanel>
-        </DockPanel>
+            </StackPanel>
+        </Panel>
     </Grid>
-</window:StyleableWindow>
-\ No newline at end of file
+</UserControl>
+\ No newline at end of file
diff --git a/Ryujinx.Ava/UI/Windows/DownloadableContentManagerWindow.axaml.cs b/Ryujinx.Ava/UI/Windows/DownloadableContentManagerWindow.axaml.cs
index 2dab1d35..6dc99fb5 100644
--- a/Ryujinx.Ava/UI/Windows/DownloadableContentManagerWindow.axaml.cs
+++ b/Ryujinx.Ava/UI/Windows/DownloadableContentManagerWindow.axaml.cs
@@ -1,314 +1,115 @@
-using Avalonia.Collections;
 using Avalonia.Controls;
-using Avalonia.Threading;
-using LibHac.Common;
-using LibHac.Fs;
-using LibHac.Fs.Fsa;
-using LibHac.FsSystem;
-using LibHac.Tools.Fs;
-using LibHac.Tools.FsSystem;
-using LibHac.Tools.FsSystem.NcaUtils;
+using Avalonia.Interactivity;
+using Avalonia.Styling;
+using FluentAvalonia.UI.Controls;
 using Ryujinx.Ava.Common.Locale;
-using Ryujinx.Ava.UI.Controls;
 using Ryujinx.Ava.UI.Helpers;
 using Ryujinx.Ava.UI.Models;
-using Ryujinx.Common.Configuration;
-using Ryujinx.Common.Utilities;
+using Ryujinx.Ava.UI.ViewModels;
 using Ryujinx.HLE.FileSystem;
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Reactive.Linq;
-using System.Text;
+using Ryujinx.Ui.Common.Helper;
 using System.Threading.Tasks;
-using Path = System.IO.Path;
+using Button = Avalonia.Controls.Button;
 
 namespace Ryujinx.Ava.UI.Windows
 {
-    public partial class DownloadableContentManagerWindow : StyleableWindow
+    public partial class DownloadableContentManagerWindow : UserControl
     {
-        private readonly List<DownloadableContentContainer> _downloadableContentContainerList;
-        private readonly string                             _downloadableContentJsonPath;
-
-        private VirtualFileSystem                      _virtualFileSystem    { get; }
-        private AvaloniaList<DownloadableContentModel> _downloadableContents { get; set; }
-
-        private ulong  _titleId   { get; }
-        private string _titleName { get; }
+        public DownloadableContentManagerViewModel ViewModel;
 
         public DownloadableContentManagerWindow()
         {
             DataContext = this;
 
             InitializeComponent();
-
-            Title = $"Ryujinx {Program.Version} - {LocaleManager.Instance[LocaleKeys.DlcWindowTitle]} - {_titleName} ({_titleId:X16})";
         }
 
         public DownloadableContentManagerWindow(VirtualFileSystem virtualFileSystem, ulong titleId, string titleName)
         {
-            _virtualFileSystem    = virtualFileSystem;
-            _downloadableContents = new AvaloniaList<DownloadableContentModel>();
-
-            _titleId   = titleId;
-            _titleName = titleName;
-
-            _downloadableContentJsonPath = Path.Combine(AppDataManager.GamesDirPath, titleId.ToString("x16"), "dlc.json");
-
-            try
-            {
-                _downloadableContentContainerList = JsonHelper.DeserializeFromFile<List<DownloadableContentContainer>>(_downloadableContentJsonPath);
-            }
-            catch
-            {
-                _downloadableContentContainerList = new List<DownloadableContentContainer>();
-            }
-
-            DataContext = this;
+            DataContext = ViewModel = new DownloadableContentManagerViewModel(virtualFileSystem, titleId, titleName);
 
             InitializeComponent();
+        }
 
-            RemoveButton.IsEnabled = false;
+        public static async Task Show(VirtualFileSystem virtualFileSystem, ulong titleId, string titleName)
+        {
+            ContentDialog contentDialog = new()
+            {
+                PrimaryButtonText   = "",
+                SecondaryButtonText = "",
+                CloseButtonText     = "",
+                Content             = new DownloadableContentManagerWindow(virtualFileSystem, titleId, titleName),
+                Title               = string.Format(LocaleManager.Instance[LocaleKeys.DlcWindowTitle], titleName, titleId.ToString("X16"))
+            };
 
-            DlcDataGrid.SelectionChanged += DlcDataGrid_SelectionChanged;
+            Style bottomBorder = new(x => x.OfType<Grid>().Name("DialogSpace").Child().OfType<Border>());
+            bottomBorder.Setters.Add(new Setter(IsVisibleProperty, false));
 
-            Title = $"Ryujinx {Program.Version} - {LocaleManager.Instance[LocaleKeys.DlcWindowTitle]} - {_titleName} ({_titleId:X16})";
+            contentDialog.Styles.Add(bottomBorder);
 
-            LoadDownloadableContents();
-            PrintHeading();
+            await ContentDialogHelper.ShowAsync(contentDialog);
         }
 
-        private void DlcDataGrid_SelectionChanged(object sender, SelectionChangedEventArgs e)
+        private void SaveAndClose(object sender, RoutedEventArgs routedEventArgs)
         {
-            RemoveButton.IsEnabled = (DlcDataGrid.SelectedItems.Count > 0);
+            ViewModel.Save();
+            ((ContentDialog)Parent).Hide();
         }
 
-        private void PrintHeading()
+        private void Close(object sender, RoutedEventArgs e)
         {
-            Heading.Text = LocaleManager.Instance.UpdateAndGetDynamicValue(LocaleKeys.DlcWindowHeading, _downloadableContents.Count, _titleName, _titleId.ToString("X16"));
+            ((ContentDialog)Parent).Hide();
         }
 
-        private void LoadDownloadableContents()
+        private void RemoveDLC(object sender, RoutedEventArgs e)
         {
-            foreach (DownloadableContentContainer downloadableContentContainer in _downloadableContentContainerList)
+            if (sender is Button button)
             {
-                if (File.Exists(downloadableContentContainer.ContainerPath))
+                if (button.DataContext is DownloadableContentModel model)
                 {
-                    using FileStream containerFile = File.OpenRead(downloadableContentContainer.ContainerPath);
-
-                    PartitionFileSystem partitionFileSystem = new(containerFile.AsStorage());
-
-                    _virtualFileSystem.ImportTickets(partitionFileSystem);
-
-                    foreach (DownloadableContentNca downloadableContentNca in downloadableContentContainer.DownloadableContentNcaList)
-                    {
-                        using UniqueRef<IFile> ncaFile = new();
-
-                        partitionFileSystem.OpenFile(ref ncaFile.Ref, downloadableContentNca.FullPath.ToU8Span(), OpenMode.Read).ThrowIfFailure();
-
-                        Nca nca = TryOpenNca(ncaFile.Get.AsStorage(), downloadableContentContainer.ContainerPath);
-                        if (nca != null)
-                        {
-                            _downloadableContents.Add(new DownloadableContentModel(nca.Header.TitleId.ToString("X16"),
-                                                                                   downloadableContentContainer.ContainerPath,
-                                                                                   downloadableContentNca.FullPath,
-                                                                                   downloadableContentNca.Enabled));
-                        }
-                    }
+                    ViewModel.Remove(model);
                 }
             }
-
-            // NOTE: Save the list again to remove leftovers.
-            Save();
         }
 
-        private Nca TryOpenNca(IStorage ncaStorage, string containerPath)
+        private void OpenLocation(object sender, RoutedEventArgs e)
         {
-            try
-            {
-                return new Nca(_virtualFileSystem.KeySet, ncaStorage);
-            }
-            catch (Exception ex)
+            if (sender is Button button)
             {
-                Dispatcher.UIThread.InvokeAsync(async () =>
+                if (button.DataContext is DownloadableContentModel model)
                 {
-                    await ContentDialogHelper.CreateErrorDialog(LocaleManager.Instance.UpdateAndGetDynamicValue(LocaleKeys.DialogLoadNcaErrorMessage, ex.Message, containerPath));
-                });
+                    OpenHelper.LocateFile(model.ContainerPath);
+                }
             }
-
-            return null;
         }
 
-        private async Task AddDownloadableContent(string path)
+        private void OnSelectionChanged(object sender, SelectionChangedEventArgs e)
         {
-            if (!File.Exists(path) || _downloadableContents.FirstOrDefault(x => x.ContainerPath == path) != null)
+            foreach (var content in e.AddedItems)
             {
-                return;
-            }
-
-            using FileStream containerFile = File.OpenRead(path);
-
-            PartitionFileSystem partitionFileSystem         = new(containerFile.AsStorage());
-            bool                containsDownloadableContent = false;
-
-            _virtualFileSystem.ImportTickets(partitionFileSystem);
-
-            foreach (DirectoryEntryEx fileEntry in partitionFileSystem.EnumerateEntries("/", "*.nca"))
-            {
-                using var ncaFile = new UniqueRef<IFile>();
-
-                partitionFileSystem.OpenFile(ref ncaFile.Ref, fileEntry.FullPath.ToU8Span(), OpenMode.Read).ThrowIfFailure();
-
-                Nca nca = TryOpenNca(ncaFile.Get.AsStorage(), path);
-                if (nca == null)
+                if (content is DownloadableContentModel model)
                 {
-                    continue;
-                }
+                    var index = ViewModel.DownloadableContents.IndexOf(model);
 
-                if (nca.Header.ContentType == NcaContentType.PublicData)
-                {
-                    if ((nca.Header.TitleId & 0xFFFFFFFFFFFFE000) != _titleId)
+                    if (index != -1)
                     {
-                        break;
+                        ViewModel.DownloadableContents[index].Enabled = true;
                     }
-
-                    _downloadableContents.Add(new DownloadableContentModel(nca.Header.TitleId.ToString("X16"), path, fileEntry.FullPath, true));
-
-                    containsDownloadableContent = true;
                 }
             }
 
-            if (!containsDownloadableContent)
+            foreach (var content in e.RemovedItems)
             {
-                await ContentDialogHelper.CreateErrorDialog(LocaleManager.Instance[LocaleKeys.DialogDlcNoDlcErrorMessage]);
-            }
-        }
-
-        private void RemoveDownloadableContents(bool removeSelectedOnly = false)
-        {
-            if (removeSelectedOnly)
-            {
-                AvaloniaList<DownloadableContentModel> removedItems = new();
-
-                foreach (var item in DlcDataGrid.SelectedItems)
+                if (content is DownloadableContentModel model)
                 {
-                    removedItems.Add(item as DownloadableContentModel);
-                }
-
-                DlcDataGrid.SelectedItems.Clear();
+                    var index = ViewModel.DownloadableContents.IndexOf(model);
 
-                foreach (var item in removedItems)
-                {
-                    _downloadableContents.RemoveAll(_downloadableContents.Where(x => x.TitleId == item.TitleId).ToList());
-                }
-            }
-            else
-            {
-                _downloadableContents.Clear();
-            }
-
-            PrintHeading();
-        }
-
-        public void RemoveSelected()
-        {
-            RemoveDownloadableContents(true);
-        }
-
-        public void RemoveAll()
-        {
-            RemoveDownloadableContents();
-        }
-
-        public void EnableAll()
-        {
-            foreach(var item in _downloadableContents)
-            {
-                item.Enabled = true;
-            }
-        }
-
-        public void DisableAll()
-        {
-            foreach (var item in _downloadableContents)
-            {
-                item.Enabled = false;
-            }
-        }
-
-        public async void Add()
-        {
-            OpenFileDialog dialog = new OpenFileDialog()
-            { 
-                Title         = LocaleManager.Instance[LocaleKeys.SelectDlcDialogTitle],
-                AllowMultiple = true
-            };
-
-            dialog.Filters.Add(new FileDialogFilter
-            {
-                Name       = "NSP",
-                Extensions = { "nsp" }
-            });
-
-            string[] files = await dialog.ShowAsync(this);
-
-            if (files != null)
-            {
-                foreach (string file in files)
-                {
-                   await AddDownloadableContent(file);
-                }
-            }
-
-            PrintHeading();
-        }
-
-        public void Save()
-        {
-            _downloadableContentContainerList.Clear();
-
-            DownloadableContentContainer container = default;
-
-            foreach (DownloadableContentModel downloadableContent in _downloadableContents)
-            {
-                if (container.ContainerPath != downloadableContent.ContainerPath)
-                {
-                    if (!string.IsNullOrWhiteSpace(container.ContainerPath))
+                    if (index != -1)
                     {
-                        _downloadableContentContainerList.Add(container);
+                        ViewModel.DownloadableContents[index].Enabled = false;
                     }
-
-                    container = new DownloadableContentContainer
-                    {
-                        ContainerPath              = downloadableContent.ContainerPath,
-                        DownloadableContentNcaList = new List<DownloadableContentNca>()
-                    };
                 }
-
-                container.DownloadableContentNcaList.Add(new DownloadableContentNca
-                {
-                    Enabled  = downloadableContent.Enabled,
-                    TitleId  = Convert.ToUInt64(downloadableContent.TitleId, 16),
-                    FullPath = downloadableContent.FullPath
-                });
-            }
-
-            if (!string.IsNullOrWhiteSpace(container.ContainerPath))
-            {
-                _downloadableContentContainerList.Add(container);
             }
-
-            using (FileStream downloadableContentJsonStream = File.Create(_downloadableContentJsonPath, 4096, FileOptions.WriteThrough))
-            {
-                downloadableContentJsonStream.Write(Encoding.UTF8.GetBytes(JsonHelper.Serialize(_downloadableContentContainerList, true)));
-            }
-        }
-
-        public void SaveAndClose()
-        {
-            Save();
-            Close();
         }
     }
 }
 \ No newline at end of file