NPC refactor (#10122)

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

Content.Server/NPC/HTN/PrimitiveTasks/Operators/RotateToTargetOperator.cs

@@ -0,0 +1,53 @@
+using Content.Shared.Interaction;
+
+namespace Content.Server.NPC.HTN.PrimitiveTasks.Operators;
+
+public sealed class RotateToTargetOperator : HTNOperator
+{
+    [Dependency] private readonly IEntityManager _entityManager = default!;
+    private RotateToFaceSystem _rotate = default!;
+
+    [ViewVariables, DataField("targetKey")]
+    public string TargetKey = "RotateTarget";
+
+    [ViewVariables, DataField("rotateSpeedKey")]
+    public string RotationSpeedKey = NPCBlackboard.RotateSpeed;
+
+    // Didn't use a key because it's likely the same between all NPCs
+    [ViewVariables, DataField("tolerance")]
+    public Angle Tolerance = Angle.FromDegrees(1);
+
+    public override void Initialize(IEntitySystemManager sysManager)
+    {
+        base.Initialize(sysManager);
+        _rotate = sysManager.GetEntitySystem<RotateToFaceSystem>();
+    }
+
+    public override void Shutdown(NPCBlackboard blackboard, HTNOperatorStatus status)
+    {
+        base.Shutdown(blackboard, status);
+        blackboard.Remove<Angle>(TargetKey);
+    }
+
+    public override HTNOperatorStatus Update(NPCBlackboard blackboard, float frameTime)
+    {
+        if (!blackboard.TryGetValue<Angle>(TargetKey, out var rotateTarget, _entityManager))
+        {
+            return HTNOperatorStatus.Failed;
+        }
+
+        if (!blackboard.TryGetValue<float>(RotationSpeedKey, out var rotateSpeed, _entityManager))
+        {
+            return HTNOperatorStatus.Failed;
+        }
+
+        var owner = blackboard.GetValue<EntityUid>(NPCBlackboard.Owner);
+
+        if (_rotate.TryRotateTo(owner, rotateTarget, frameTime, Tolerance, rotateSpeed))
+        {
+            return HTNOperatorStatus.Finished;
+        }
+
+        return HTNOperatorStatus.Continuing;
+    }
+}