Carcat night vision (#1046)

* carcat night vision

* Update nightVision.yml

Content.Client/_CP14/NightVision/CP14ClientNightVisionSystem.cs

@@ -0,0 +1,65 @@
+using Content.Shared._CP14.NightVision;
+using Robust.Client.Player;
+using Robust.Shared.Player;
+
+namespace Content.Client._CP14.NightVision;
+
+public sealed class CP14ClientNightVisionSystem : CP14SharedNightVisionSystem
+{
+    [Dependency] private readonly SharedTransformSystem _transform = default!;
+    [Dependency] private readonly IPlayerManager _playerManager = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<CP14NightVisionComponent, CP14ToggleNightVisionEvent>(OnToggleNightVision);
+        SubscribeLocalEvent<CP14NightVisionComponent, PlayerDetachedEvent>(OnPlayerDetached);
+    }
+
+    protected override void OnRemove(Entity<CP14NightVisionComponent> ent, ref ComponentRemove args)
+    {
+        base.OnRemove(ent, ref args);
+
+        NightVisionOff(ent);
+    }
+
+    private void OnPlayerDetached(Entity<CP14NightVisionComponent> ent, ref PlayerDetachedEvent args)
+    {
+        NightVisionOff(ent);
+    }
+
+    private void OnToggleNightVision(Entity<CP14NightVisionComponent> ent, ref CP14ToggleNightVisionEvent args)
+    {
+        NightVisionToggle(ent);
+    }
+
+    private void NightVisionOn(Entity<CP14NightVisionComponent> ent)
+    {
+        if (_playerManager.LocalSession?.AttachedEntity != ent)
+            return;
+
+        var nightVisionLight = Spawn(ent.Comp.LightPrototype, Transform(ent).Coordinates);
+        _transform.SetParent(nightVisionLight, ent);
+        _transform.SetWorldRotation(nightVisionLight, _transform.GetWorldRotation(ent));
+        ent.Comp.LocalLightEntity = nightVisionLight;
+    }
+
+    private void NightVisionOff(Entity<CP14NightVisionComponent> ent)
+    {
+        QueueDel(ent.Comp.LocalLightEntity);
+        ent.Comp.LocalLightEntity = null;
+    }
+
+    private void NightVisionToggle(Entity<CP14NightVisionComponent> ent)
+    {
+        if (ent.Comp.LocalLightEntity == null)
+        {
+            NightVisionOn(ent);
+        }
+        else
+        {
+            NightVisionOff(ent);
+        }
+    }
+}