Brain behavior (#2284)

* brain moment + zoom is 0.5 by default

* Address reviews

Content.Client/GameObjects/EntitySystems/MoverSystem.cs

@@ -25,12 +25,11 @@ namespace Content.Client.GameObjects.EntitySystems
         {
             var playerEnt = _playerManager.LocalPlayer?.ControlledEntity;
 
-            if (playerEnt == null || !playerEnt.TryGetComponent(out IMoverComponent? mover))
+            if (playerEnt == null || !playerEnt.TryGetComponent(out IMoverComponent? mover) || !playerEnt.TryGetComponent(out IPhysicsComponent? physics))
             {
                 return;
             }
 
-            var physics = playerEnt.GetComponent<IPhysicsComponent>();
             physics.Predict = true;
 
             UpdateKinematics(playerEnt.Transform, mover, physics);

Content.Server/GameObjects/Components/Body/Behavior/BrainBehaviorComponent.cs

@@ -0,0 +1,74 @@
+#nullable enable
+using Content.Server.GameObjects.Components.Mobs;
+using Content.Server.Mobs;
+using Content.Shared.GameObjects.Components.Body;
+using Content.Shared.GameObjects.Components.Body.Behavior;
+using Content.Shared.GameObjects.Components.Body.Part;
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameObjects.ComponentDependencies;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Log;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Server.GameObjects.Components.Body.Behavior
+{
+    [RegisterComponent]
+    public class BrainBehaviorComponent : MechanismBehaviorComponent
+    {
+        public override string Name => "Brain";
+
+        protected override void OnAddedToBody()
+        {
+            base.OnAddedToBody();
+
+            HandleMind(Body!.Owner, Owner);
+        }
+
+        protected override void OnAddedToPart()
+        {
+            base.OnAddedToPart();
+
+            HandleMind(Part!.Owner, Owner);
+        }
+
+        protected override void OnAddedToPartInBody()
+        {
+            base.OnAddedToPartInBody();
+
+            HandleMind(Body!.Owner, Owner);
+        }
+
+        protected override void OnRemovedFromBody(IBody old)
+        {
+            base.OnRemovedFromBody(old);
+
+            HandleMind(Part!.Owner, old.Owner);
+        }
+
+        protected override void OnRemovedFromPart(IBodyPart old)
+        {
+            base.OnRemovedFromPart(old);
+
+            HandleMind(Owner, old.Owner);
+        }
+
+        protected override void OnRemovedFromPartInBody(IBody? oldBody, IBodyPart? oldPart)
+        {
+            base.OnRemovedFromPartInBody(oldBody, oldPart);
+
+            HandleMind(oldBody!.Owner, Owner);
+        }
+
+        private void HandleMind(IEntity newEntity, IEntity oldEntity)
+        {
+            var newMind = newEntity.EnsureComponent<MindComponent>();
+            var oldMind = oldEntity.EnsureComponent<MindComponent>();
+
+            oldMind.Mind?.TransferTo(newEntity);
+        }
+
+        public override void Update(float frameTime)
+        {
+        }
+    }
+}

Content.Shared/GameObjects/Components/Body/Behavior/BrainBehaviorComponent.cs

@@ -1,15 +0,0 @@
-using Robust.Shared.GameObjects;
-
-namespace Content.Shared.GameObjects.Components.Body.Behavior
-{
-    [RegisterComponent]
-    public class BrainBehaviorComponent : MechanismBehaviorComponent
-    {
-        public override string Name => "Brain";
-
-        public override void Update(float frameTime)
-        {
-            // TODO BODY
-        }
-    }
-}

Content.Shared/GameObjects/Components/Body/Mechanism/SharedMechanismComponent.cs

@@ -1,5 +1,6 @@
 #nullable enable
 using System.Collections.Generic;
+using System.Linq;
 using Content.Shared.GameObjects.Components.Body.Behavior;
 using Content.Shared.GameObjects.Components.Body.Part;
 using Robust.Shared.GameObjects;
@@ -132,7 +133,7 @@ namespace Content.Shared.GameObjects.Components.Body.Mechanism
             Owner.Transform.AttachParent(Part!.Owner);
             OnAddedToPart();
 
-            foreach (var behavior in Owner.GetAllComponents<IMechanismBehavior>())
+            foreach (var behavior in Owner.GetAllComponents<IMechanismBehavior>().ToArray())
             {
                 behavior.AddedToPart();
             }