Mesen2/UI/ViewModels/VideoRecordConfigViewModel.cs

using Mesen.Config;
using Mesen.Interop;
using ReactiveUI;
using ReactiveUI.Fody.Helpers;
using System;
using System.IO;
using System.Reactive.Linq;

namespace Mesen.ViewModels
{
	public class VideoRecordConfigViewModel : DisposableViewModel
	{
		[Reactive] public string SavePath { get; set; }
		[Reactive] public VideoRecordConfig Config { get; set; }
		
		[ObservableAsProperty] public bool CompressionAvailable { get; set; }
		
		public VideoRecordConfigViewModel()
		{
			Config = ConfigManager.Config.VideoRecord.Clone();

			SavePath = Path.Join(ConfigManager.AviFolder, EmuApi.GetRomInfo().GetRomName() + (Config.Codec == VideoCodec.GIF ? ".gif" : ".avi"));

			AddDisposable(this.WhenAnyValue(x => x.Config.Codec).Select(x => x == VideoCodec.ZMBV || x == VideoCodec.CSCD).ToPropertyEx(this, x => x.CompressionAvailable));
			AddDisposable(this.WhenAnyValue(x => x.Config.Codec).Subscribe((codec) => {
				if(codec == VideoCodec.GIF && Path.GetExtension(SavePath).ToLowerInvariant() != ".gif") {
					SavePath = Path.ChangeExtension(SavePath, ".gif");
				} else if(codec != VideoCodec.GIF && Path.GetExtension(SavePath).ToLowerInvariant() == ".gif") {
					SavePath = Path.ChangeExtension(SavePath, ".avi");
				}
			}));
		}

		public void SaveConfig()
		{
			ConfigManager.Config.VideoRecord = Config.Clone();
		}
   }
}