Code/SboxSuperuser/Components/SuperuserBootstrap.Presence.cs
Partial of SuperuserBootstrap that hooks the network listener's OnActive and OnDisconnected callbacks. On the host it applies and clears engine claims, records connections, notifies PropTrackingSystem, and broadcasts catalog-rendered join and leave chat lines. Also has a helper that detects the engine's built-in presence messages by their emoji prefix and suffix.
using Sandbox;
namespace SboxSuperuser.Components;
/// <summary>Replaces the engine's join and leave lines with the server's own wording, without the emoji.</summary>
public sealed partial class SuperuserBootstrap
{
private const string EngineJoinPrefix = "👋 ";
void Component.INetworkListener.OnActive( Connection connection )
{
if ( Networking.IsHost )
{
_session?.GetRuntime()?.ApplyEngineClaims( connection );
_session?.GetRuntime()?.RecordConnection( connection );
Scene.GetSystem<Systems.PropTrackingSystem>()?.PlayerReturned( connection.SteamId.ToString() );
}
AnnouncePresence( connection, "join" );
}
void Component.INetworkListener.OnDisconnected( Connection connection )
{
if ( Networking.IsHost )
{
var runtime = _session?.GetRuntime();
runtime?.ForgetEngineClaims( connection );
if ( runtime is not null ) Scene.GetSystem<Systems.PropTrackingSystem>()?.PlayerLeft( connection.SteamId.ToString(), runtime.PropCleanup.Current.Delay );
}
AnnouncePresence( connection, "leave" );
}
private static void AnnouncePresence( Connection connection, string message )
{
if ( !Networking.IsHost || connection is null ) return;
var catalog = Superuser.MessageCatalog;
if ( catalog.Render( message, target: connection.DisplayName ) is { } line ) Superuser.BroadcastChatLine( line );
}
/// <summary>The engine's own "👋 name has joined the game" and "👋 name left the game" notices.</summary>
private static bool IsEnginePresence( ChatMessageEvent message ) => message.Sender is null && message.Message is { } text
&& text.StartsWith( EngineJoinPrefix, StringComparison.Ordinal )
&& (text.EndsWith( " has joined the game", StringComparison.Ordinal ) || text.EndsWith( " left the game", StringComparison.Ordinal ));
}