feat: wip...migrating to proper app

src/StreamShorts.Console/Commands/DefaultCommand.cs

@@ -0,0 +1,45 @@
+namespace StreamShorts.Console.Commands;
+
+internal class DefaultCommand(
+  IFileSystem fileSystem,
+  IAnsiConsole console
+) : AsyncCommand<DefaultCommand.Settings>
+{
+  private readonly IFileSystem _fileSystem = fileSystem ?? throw new ArgumentNullException(nameof(fileSystem));
+  private readonly IAnsiConsole _console = console ?? throw new ArgumentNullException(nameof(console));
+
+  internal class Settings : CommandSettings
+  {
+    [CommandArgument(0, "[Stream]")]
+    [Description("The path to the stream")]
+    public string Stream { get; init; } = string.Empty;
+  }
+
+  public override ValidationResult Validate(CommandContext context, Settings settings)
+  {
+    if (string.IsNullOrWhiteSpace(settings.Stream))
+    {
+      return ValidationResult.Error("Stream path must be provided.");
+    }
+
+    if (_fileSystem.File.Exists(settings.Stream) is false)
+    {
+      return ValidationResult.Error($"The specified stream file '{settings.Stream}' does not exist.");
+    }
+
+    var fileExtension = _fileSystem.Path.GetExtension(settings.Stream).ToUpperInvariant();
+
+    if (fileExtension != ".MP4")
+    {
+      return ValidationResult.Error("The specified stream file must be an .mp4 file.");
+    }
+
+    return base.Validate(context, settings);
+  }
+
+  public override Task<int> ExecuteAsync(CommandContext context, Settings settings)
+  {
+    _console.Write($"[green]Processing stream:[/] {settings.Stream}");
+    return Task.FromResult(0);
+  }
+}