1  using Ryujinx.UI.App.Common;
 2  using System;
 3  
 4  namespace Ryujinx.Ava.UI.ViewModels
 5  {
 6      /// <summary>
 7      /// Implements a custom comparer which is used for sorting titles by favorite on a UI.
 8      /// Returns a sorted list of favorites in alphabetical order, followed by all non-favorites sorted alphabetical.
 9      /// </summary>
10      public readonly struct AppListFavoriteComparable : IComparable
11      {
12          /// <summary>
13          /// The application data being compared.
14          /// </summary>
15          private readonly ApplicationData app;
16  
17          /// <summary>
18          /// Constructs a new <see cref="AppListFavoriteComparable"/> with the specified application data.
19          /// </summary>
20          /// <param name="app">The app data being compared.</param>
21          public AppListFavoriteComparable(ApplicationData app)
22          {
23              ArgumentNullException.ThrowIfNull(app, nameof(app));
24              this.app = app;
25          }
26  
27          /// <inheritdoc/>
28          public readonly int CompareTo(object o)
29          {
30              if (o is AppListFavoriteComparable other)
31              {
32                  if (app.Favorite == other.app.Favorite)
33                  {
34                      return string.Compare(app.Name, other.app.Name, StringComparison.OrdinalIgnoreCase);
35                  }
36  
37                  return app.Favorite ? -1 : 1;
38              }
39  
40              throw new InvalidCastException($"Cannot cast {o.GetType()} to {nameof(AppListFavoriteComparable)}");
41          }
42      }
43  }