Adds DeadSessionController

src/Tgstation.Server.Host/Components/Watchdog/DeadSessionController.cs

@@ -0,0 +1,99 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Tgstation.Server.Host.Components.Watchdog
+{
+	/// <summary>
+	/// Implements a fake "dead" <see cref="ISessionController"/>
+	/// </summary>
+	sealed class DeadSessionController : ISessionController
+	{
+		/// <inheritdoc />
+		public Task<LaunchResult> LaunchResult { get; }
+
+		/// <inheritdoc />
+		public bool IsPrimary => false;
+
+		/// <inheritdoc />
+		public bool TerminationWasRequested => true;
+
+		/// <inheritdoc />
+		public ApiValidationStatus ApiValidationStatus => throw new NotSupportedException();
+
+		/// <inheritdoc />
+		public IDmbProvider Dmb { get; }
+
+		/// <inheritdoc />
+		public ushort? Port => null;
+
+		/// <inheritdoc />
+		public bool ClosePortOnReboot
+		{
+			get => throw new NotSupportedException();
+			set => throw new NotSupportedException();
+		}
+
+		/// <inheritdoc />
+		public RebootState RebootState => throw new NotSupportedException();
+
+		/// <inheritdoc />
+		public Task OnReboot { get; }
+
+		/// <inheritdoc />
+		public Task<int> Lifetime { get; }
+
+		/// <summary>
+		/// If the <see cref="DeadSessionController"/> was <see cref="Dispose"/>d
+		/// </summary>
+		bool disposed;
+
+		/// <summary>
+		/// Construct a <see cref="DeadSessionController"/>
+		/// </summary>
+		/// <param name="dmbProvider">The value of <see cref="Dmb"/></param>
+		public DeadSessionController(IDmbProvider dmbProvider)
+		{
+			Dmb = dmbProvider ?? throw new ArgumentNullException(nameof(dmbProvider));
+			LaunchResult = Task.FromResult(new LaunchResult
+			{
+				StartupTime = TimeSpan.FromSeconds(0)
+			});
+			Lifetime = Task.FromResult(-1);
+			OnReboot = new TaskCompletionSource<object>().Task;
+		}
+
+		/// <inheritdoc />
+		public void Dispose()
+		{
+			lock (this)
+			{
+				if (disposed)
+					return;
+				disposed = true;
+			}
+			Dmb.Dispose();
+		}
+
+		/// <inheritdoc />
+		public void EnableCustomChatCommands() => throw new NotSupportedException();
+
+		/// <inheritdoc />
+		public ReattachInformation Release() => throw new NotSupportedException();
+
+		/// <inheritdoc />
+		public void ResetRebootState() => throw new NotSupportedException();
+
+		/// <inheritdoc />
+		public Task<string> SendCommand(string command, CancellationToken cancellationToken) => throw new NotSupportedException();
+
+		/// <inheritdoc />
+		public void SetHighPriority() => throw new NotSupportedException();
+
+		/// <inheritdoc />
+		public Task<bool> SetPort(ushort newPort, CancellationToken cancellatonToken) => throw new NotSupportedException();
+
+		/// <inheritdoc />
+		public Task<bool> SetRebootState(RebootState newRebootState, CancellationToken cancellationToken) => throw new NotSupportedException();
+	}
+}