Fix CustomCommands never getting their ICustomCommandHandler

src/Tgstation.Server.Host/Components/Chat/ChatManager.cs

@@ -645,6 +645,7 @@ namespace Tgstation.Server.Host.Components.Chat
 			IChatTrackingContext context = null;
 			lock (mappedChannels)
 				context = new ChatTrackingContext(
+					customCommandHandler,
 					mappedChannels.Select(y => y.Value.Channel),
 					loggerFactory.CreateLogger<ChatTrackingContext>(),
 					() =>

src/Tgstation.Server.Host/Components/Chat/ChatTrackingContext.cs

@@ -26,7 +26,22 @@ namespace Tgstation.Server.Host.Components.Chat
 		public IReadOnlyCollection<ChannelRepresentation> Channels { get; private set; }
 
 		/// <inheritdoc />
-		public IReadOnlyCollection<CustomCommand> CustomCommands { get; set; }
+		public IEnumerable<CustomCommand> CustomCommands
+		{
+			get => customCommands;
+			set => customCommands = (value ?? throw new InvalidOperationException("value cannot be null!"))
+				.Select(customCommand =>
+				{
+					customCommand.SetHandler(customCommandHandler);
+					return customCommand;
+				})
+				.ToList();
+		}
+
+		/// <summary>
+		/// The <see cref="ICustomCommandHandler"/> for the <see cref="ChatTrackingContext"/>.
+		/// </summary>
+		readonly ICustomCommandHandler customCommandHandler;
 
 		/// <summary>
 		/// The <see cref="ILogger"/> for the <see cref="ChatTrackingContext"/>.
@@ -38,6 +53,11 @@ namespace Tgstation.Server.Host.Components.Chat
 		/// </summary>
 		readonly object synchronizationLock;
 
+		/// <summary>
+		/// Backing field for <see cref="CustomCommands"/>.
+		/// </summary>
+		IReadOnlyCollection<CustomCommand> customCommands;
+
 		/// <summary>
 		/// The <see cref="IChannelSink"/> if any.
 		/// </summary>
@@ -56,20 +76,24 @@ namespace Tgstation.Server.Host.Components.Chat
 		/// <summary>
 		/// Initializes a new instance of the <see cref="ChatTrackingContext"/> <see langword="class"/>.
 		/// </summary>
+		/// <param name="customCommandHandler">The value of <see cref="customCommandHandler"/>.</param>
 		/// <param name="initialChannels">The initial value of <see cref="Channels"/>.</param>
 		/// <param name="logger">The value of <see cref="logger"/>.</param>
 		/// <param name="onDispose">The value of <see cref="onDispose"/>.</param>
 		public ChatTrackingContext(
+			ICustomCommandHandler customCommandHandler,
 			IEnumerable<ChannelRepresentation> initialChannels,
 			ILogger<ChatTrackingContext> logger,
 			Action onDispose)
 		{
+			this.customCommandHandler = customCommandHandler ?? throw new ArgumentNullException(nameof(customCommandHandler));
 			Channels = initialChannels?.ToList() ?? throw new ArgumentNullException(nameof(initialChannels));
 			this.logger = logger ?? throw new ArgumentNullException(nameof(logger));
 			this.onDispose = onDispose ?? throw new ArgumentNullException(nameof(onDispose));
 
 			synchronizationLock = new object();
 			Active = true;
+			customCommands = Array.Empty<CustomCommand>();
 		}
 
 		/// <inheritdoc />

src/Tgstation.Server.Host/Components/Chat/IChatTrackingContext.cs

@@ -22,7 +22,7 @@ namespace Tgstation.Server.Host.Components.Chat
 		/// <summary>
 		/// <see cref="IReadOnlyCollection{T}"/> of <see cref="CustomCommand"/>s in the <see cref="IChatTrackingContext"/>.
 		/// </summary>
-		IReadOnlyCollection<CustomCommand> CustomCommands { get; set; }
+		IEnumerable<CustomCommand> CustomCommands { get; set; }
 
 		/// <summary>
 		/// Sets the <paramref name="channelSink"/> for the <see cref="IChatTrackingContext"/>.