NPC refactor (#10122)

Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Client/NPC/HTN/HTNComponent.cs

@@ -0,0 +1,7 @@
+namespace Content.Client.NPC.HTN;
+
+[RegisterComponent]
+public sealed class HTNComponent : NPCComponent
+{
+    public string DebugText = string.Empty;
+}

Content.Client/NPC/HTN/HTNOverlay.cs

@@ -0,0 +1,41 @@
+using Robust.Client.Graphics;
+using Robust.Client.ResourceManagement;
+using Robust.Shared.Enums;
+
+namespace Content.Client.NPC.HTN;
+
+public sealed class HTNOverlay : Overlay
+{
+    private readonly IEntityManager _entManager = default!;
+    private readonly Font _font = default!;
+
+    public override OverlaySpace Space => OverlaySpace.ScreenSpace;
+
+    public HTNOverlay(IEntityManager entManager, IResourceCache resourceCache)
+    {
+        _entManager = entManager;
+        _font = new VectorFont(resourceCache.GetResource<FontResource>("/Fonts/NotoSans/NotoSans-Regular.ttf"), 10);
+    }
+
+    protected override void Draw(in OverlayDrawArgs args)
+    {
+        if (args.ViewportControl == null)
+            return;
+
+        var handle = args.ScreenHandle;
+
+        foreach (var (comp, xform) in _entManager.EntityQuery<HTNComponent, TransformComponent>(true))
+        {
+            if (string.IsNullOrEmpty(comp.DebugText) || xform.MapID != args.MapId)
+                continue;
+
+            var worldPos = xform.WorldPosition;
+
+            if (!args.WorldAABB.Contains(worldPos))
+                continue;
+
+            var screenPos = args.ViewportControl.WorldToScreen(worldPos);
+            handle.DrawString(_font, screenPos + new Vector2(0, 10f), comp.DebugText);
+        }
+    }
+}

Content.Client/NPC/HTN/HTNSystem.cs

@@ -0,0 +1,54 @@
+using Content.Shared.NPC;
+using Robust.Client.Graphics;
+using Robust.Client.ResourceManagement;
+
+namespace Content.Client.NPC.HTN;
+
+public sealed class HTNSystem : EntitySystem
+{
+    /*
+     * Mainly handles clientside debugging for HTN NPCs.
+     */
+    public bool EnableOverlay
+    {
+        get => _enableOverlay;
+        set
+        {
+            var overlayManager = IoCManager.Resolve<IOverlayManager>();
+            _enableOverlay = value;
+
+            if (_enableOverlay)
+            {
+                overlayManager.AddOverlay(new HTNOverlay(EntityManager, IoCManager.Resolve<IResourceCache>()));
+                RaiseNetworkEvent(new RequestHTNMessage()
+                {
+                    Enabled = true,
+                });
+            }
+            else
+            {
+                overlayManager.RemoveOverlay<HTNOverlay>();
+                RaiseNetworkEvent(new RequestHTNMessage()
+                {
+                    Enabled = false,
+                });
+            }
+        }
+    }
+
+    private bool _enableOverlay;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+        SubscribeNetworkEvent<HTNMessage>(OnHTNMessage);
+    }
+
+    private void OnHTNMessage(HTNMessage ev)
+    {
+        if (!TryComp<HTNComponent>(ev.Uid, out var htn))
+            return;
+
+        htn.DebugText = ev.Text;
+    }
+}