Initial commit: Futonizer MKV track stripper

Models/TrackItem.cs

@@ -0,0 +1,70 @@
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace Futonizer.Models;
+
+/// <summary>
+/// Represents one track of a queued MKV file, as shown in the track table.
+/// The <see cref="Copy"/> property is user-editable and drives which tracks
+/// are passed to mkvmerge when stripping.
+/// </summary>
+public class TrackItem : INotifyPropertyChanged
+{
+    private bool _copy;
+
+    public int Id { get; init; }
+    public string Type { get; init; } = string.Empty;
+    public string Codec { get; init; } = string.Empty;
+    public string Language { get; init; } = string.Empty;
+    public string Name { get; init; } = string.Empty;
+    public bool ForcedDisplay { get; init; }
+
+    private bool _defaultTrack;
+
+    /// <summary>
+    /// Whether this track should be flagged as the default track of its type
+    /// when stripped. For subtitles this is kept in sync with <see cref="Copy"/>
+    /// (selecting a subtitle also makes it the default one).
+    /// </summary>
+    public bool DefaultTrack
+    {
+        get => _defaultTrack;
+        set
+        {
+            if (_defaultTrack == value) return;
+            _defaultTrack = value;
+            OnPropertyChanged();
+        }
+    }
+
+    /// <summary>
+    /// Text shown in the track table's Name column. Subtitle tracks are shown
+    /// as "Codec/Name" so tracks that share a display name but use a different
+    /// codec are easy to tell apart.
+    /// </summary>
+    public string DisplayName => Type == "subtitles" ? $"{Codec}/{Name}" : Name;
+
+    public bool Copy
+    {
+        get => _copy;
+        set
+        {
+            if (_copy == value) return;
+            _copy = value;
+            OnPropertyChanged();
+        }
+    }
+
+    /// <summary>
+    /// Key used to match subtitle tracks with the same identity across different
+    /// queued files when propagating a subtitle selection. Subtitles are matched
+    /// on "Codec/Name" so tracks with the same name but a different codec are
+    /// treated as distinct.
+    /// </summary>
+    public string PropagationKey => DisplayName;
+
+    public event PropertyChangedEventHandler? PropertyChanged;
+
+    private void OnPropertyChanged([CallerMemberName] string? name = null)
+        => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
+}